X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=shell%2Fmsh.c;h=aa6fb1d2613acdce30237ae398b6a51bc2b233d3;hb=29eb3599e4014c225365f2c5539cf8a3ef46136e;hp=b491a08a4bb85597883345cb3968b20976a241ef;hpb=c9c1a41c581101f53cc36efae53cd8ebb568962f;p=oweals%2Fbusybox.git diff --git a/shell/msh.c b/shell/msh.c index b491a08a4..aa6fb1d26 100644 --- a/shell/msh.c +++ b/shell/msh.c @@ -13,53 +13,121 @@ * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. */ -#include "busybox.h" -#include #include +#include -#include "cmdedit.h" +#ifdef STANDALONE +# ifndef _GNU_SOURCE +# define _GNU_SOURCE +# endif +# include +# include +# include +# include +# include +# include +# include +# include +# include +# include +# include +# include +# include +# define bb_dev_null "/dev/null" +# define DEFAULT_SHELL "/proc/self/exe" +# define CONFIG_BUSYBOX_EXEC_PATH "/proc/self/exe" +# define bb_banner "busybox standalone" +# define ENABLE_FEATURE_SH_STANDALONE 0 +# define bb_msg_memory_exhausted "memory exhausted" +# define xmalloc(size) malloc(size) +# define msh_main(argc,argv) main(argc,argv) +# define safe_read(fd,buf,count) read(fd,buf,count) +# define nonblock_safe_read(fd,buf,count) read(fd,buf,count) +# define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1]) +# define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1]) +# define ATTRIBUTE_NORETURN __attribute__ ((__noreturn__)) +static int find_applet_by_name(const char *applet) +{ + return -1; +} +static char *utoa_to_buf(unsigned n, char *buf, unsigned buflen) +{ + unsigned i, out, res; + assert(sizeof(unsigned) == 4); + if (buflen) { + out = 0; + for (i = 1000000000; i; i /= 10) { + res = n / i; + if (res || out || i == 1) { + if (!--buflen) break; + out++; + n -= res*i; + *buf++ = '0' + res; + } + } + } + return buf; +} +static char *itoa_to_buf(int n, char *buf, unsigned buflen) +{ + if (buflen && n < 0) { + n = -n; + *buf++ = '-'; + buflen--; + } + return utoa_to_buf((unsigned)n, buf, buflen); +} +static char local_buf[12]; +static char *itoa(int n) +{ + *(itoa_to_buf(n, local_buf, sizeof(local_buf))) = '\0'; + return local_buf; +} +#else +# include "busybox.h" /* for applet_names */ +#endif -/*#define MSHDEBUG 1*/ +//#define MSHDEBUG 4 #ifdef MSHDEBUG -int mshdbg = MSHDEBUG; +static int mshdbg = MSHDEBUG; -#define DBGPRINTF(x) if(mshdbg>0)printf x -#define DBGPRINTF0(x) if(mshdbg>0)printf x -#define DBGPRINTF1(x) if(mshdbg>1)printf x -#define DBGPRINTF2(x) if(mshdbg>2)printf x -#define DBGPRINTF3(x) if(mshdbg>3)printf x -#define DBGPRINTF4(x) if(mshdbg>4)printf x -#define DBGPRINTF5(x) if(mshdbg>5)printf x -#define DBGPRINTF6(x) if(mshdbg>6)printf x -#define DBGPRINTF7(x) if(mshdbg>7)printf x -#define DBGPRINTF8(x) if(mshdbg>8)printf x -#define DBGPRINTF9(x) if(mshdbg>9)printf x +#define DBGPRINTF(x) if (mshdbg>0) printf x +#define DBGPRINTF0(x) if (mshdbg>0) printf x +#define DBGPRINTF1(x) if (mshdbg>1) printf x +#define DBGPRINTF2(x) if (mshdbg>2) printf x +#define DBGPRINTF3(x) if (mshdbg>3) printf x +#define DBGPRINTF4(x) if (mshdbg>4) printf x +#define DBGPRINTF5(x) if (mshdbg>5) printf x +#define DBGPRINTF6(x) if (mshdbg>6) printf x +#define DBGPRINTF7(x) if (mshdbg>7) printf x +#define DBGPRINTF8(x) if (mshdbg>8) printf x +#define DBGPRINTF9(x) if (mshdbg>9) printf x -int mshdbg_rc = 0; +static int mshdbg_rc = 0; -#define RCPRINTF(x) if(mshdbg_rc)printf x +#define RCPRINTF(x) if (mshdbg_rc) printf x #else #define DBGPRINTF(x) -#define DBGPRINTF0(x) -#define DBGPRINTF1(x) -#define DBGPRINTF2(x) -#define DBGPRINTF3(x) -#define DBGPRINTF4(x) -#define DBGPRINTF5(x) -#define DBGPRINTF6(x) -#define DBGPRINTF7(x) -#define DBGPRINTF8(x) -#define DBGPRINTF9(x) - -#define RCPRINTF(x) +#define DBGPRINTF0(x) ((void)0) +#define DBGPRINTF1(x) ((void)0) +#define DBGPRINTF2(x) ((void)0) +#define DBGPRINTF3(x) ((void)0) +#define DBGPRINTF4(x) ((void)0) +#define DBGPRINTF5(x) ((void)0) +#define DBGPRINTF6(x) ((void)0) +#define DBGPRINTF7(x) ((void)0) +#define DBGPRINTF8(x) ((void)0) +#define DBGPRINTF9(x) ((void)0) + +#define RCPRINTF(x) ((void)0) #endif /* MSHDEBUG */ -#ifdef CONFIG_FEATURE_SH_FANCY_PROMPT +#if ENABLE_FEATURE_EDITING_FANCY_PROMPT # define DEFAULT_ROOT_PROMPT "\\u:\\w> " # define DEFAULT_USER_PROMPT "\\u:\\w$ " #else @@ -84,61 +152,78 @@ int mshdbg_rc = 0; /* * values returned by wait */ -#define WAITSIG(s) ((s)&0177) -#define WAITVAL(s) (((s)>>8)&0377) -#define WAITCORE(s) (((s)&0200)!=0) +#define WAITSIG(s) ((s) & 0177) +#define WAITVAL(s) (((s) >> 8) & 0377) +#define WAITCORE(s) (((s) & 0200) != 0) /* * library and system definitions */ -typedef void xint; /* base type of jmp_buf, for not broken compilers */ +typedef void xint; /* base type of jmp_buf, for not broken compilers */ /* * shell components */ - -#define QUOTE 0200 - #define NOBLOCK ((struct op *)NULL) #define NOWORD ((char *)NULL) #define NOWORDS ((char **)NULL) #define NOPIPE ((int *)NULL) +/* + * redirection + */ +struct ioword { + smallint io_flag; /* action (below) */ + int io_fd; /* fd affected */ + char *io_name; /* file name */ +}; + +#define IOREAD 1 /* < */ +#define IOHERE 2 /* << (here file) */ +#define IOWRITE 4 /* > */ +#define IOCAT 8 /* >> */ +#define IOXHERE 16 /* ${}, ` in << */ +#define IODUP 32 /* >&digit */ +#define IOCLOSE 64 /* >&- */ + +#define IODEFAULT (-1) /* "default" IO fd */ + + /* * Description of a command or an operation on commands. * Might eventually use a union. */ struct op { - int type; /* operation type, see below */ - char **words; /* arguments to a command */ - struct ioword **ioact; /* IO actions (eg, < > >>) */ + smallint op_type; /* operation type, see Txxxx below */ + char **op_words; /* arguments to a command */ + struct ioword **ioact; /* IO actions (eg, < > >>) */ struct op *left; struct op *right; - char *str; /* identifier for case and for */ + char *str; /* identifier for case and for */ }; -#define TCOM 1 /* command */ -#define TPAREN 2 /* (c-list) */ -#define TPIPE 3 /* a | b */ -#define TLIST 4 /* a [&;] b */ -#define TOR 5 /* || */ -#define TAND 6 /* && */ -#define TFOR 7 -#define TDO 8 -#define TCASE 9 -#define TIF 10 -#define TWHILE 11 -#define TUNTIL 12 -#define TELIF 13 -#define TPAT 14 /* pattern in case */ -#define TBRACE 15 /* {c-list} */ -#define TASYNC 16 /* c & */ +#define TCOM 1 /* command */ +#define TPAREN 2 /* (c-list) */ +#define TPIPE 3 /* a | b */ +#define TLIST 4 /* a [&;] b */ +#define TOR 5 /* || */ +#define TAND 6 /* && */ +#define TFOR 7 +#define TDO 8 +#define TCASE 9 +#define TIF 10 +#define TWHILE 11 +#define TUNTIL 12 +#define TELIF 13 +#define TPAT 14 /* pattern in case */ +#define TBRACE 15 /* {c-list} */ +#define TASYNC 16 /* c & */ /* Added to support "." file expansion */ -#define TDOT 17 +#define TDOT 17 /* Strings for names to make debug easier */ #ifdef MSHDEBUG -static char *T_CMD_NAMES[] = { +static const char *const T_CMD_NAMES[] = { "PLACEHOLDER", "TCOM", "TPAREN", @@ -160,32 +245,18 @@ static char *T_CMD_NAMES[] = { }; #endif -/* - * actions determining the environment of a process - */ -#define BIT(i) (1<<(i)) -#define FEXEC BIT(0) /* execute without forking */ - -#define AREASIZE (90000) +#define AREASIZE (90000) /* * flags to control evaluation of words */ -#define DOSUB 1 /* interpret $, `, and quotes */ -#define DOBLANK 2 /* perform blank interpretation */ -#define DOGLOB 4 /* interpret [?* */ -#define DOKEY 8 /* move words with `=' to 2nd arg. list */ -#define DOTRIM 16 /* trim resulting string */ +#define DOSUB 1 /* interpret $, `, and quotes */ +#define DOBLANK 2 /* perform blank interpretation */ +#define DOGLOB 4 /* interpret [?* */ +#define DOKEY 8 /* move words with `=' to 2nd arg. list */ +#define DOTRIM 16 /* trim resulting string */ -#define DOALL (DOSUB|DOBLANK|DOGLOB|DOKEY|DOTRIM) - - -/* PROTOTYPES */ -static int newfile(char *s); -static char *findeq(char *cp); -static char *cclass(char *p, int sub); -static void initarea(void); -extern int msh_main(int argc, char **argv); +#define DOALL (DOSUB|DOBLANK|DOGLOB|DOKEY|DOTRIM) struct brkcon { @@ -194,78 +265,25 @@ struct brkcon { }; -/* - * redirection - */ -struct ioword { - short io_unit; /* unit affected */ - short io_flag; /* action (below) */ - char *io_name; /* file name */ -}; - -#define IOREAD 1 /* < */ -#define IOHERE 2 /* << (here file) */ -#define IOWRITE 4 /* > */ -#define IOCAT 8 /* >> */ -#define IOXHERE 16 /* ${}, ` in << */ -#define IODUP 32 /* >&digit */ -#define IOCLOSE 64 /* >&- */ - -#define IODEFAULT (-1) /* token for default IO unit */ - - - -/* - * parsing & execution environment - */ -static struct env { - char *linep; - struct io *iobase; - struct io *iop; - xint *errpt; /* void * */ - int iofd; - struct env *oenv; -} e; - -/* - * flags: - * -e: quit on error - * -k: look for name=value everywhere on command line - * -n: no execution - * -t: exit after reading and executing one command - * -v: echo as read - * -x: trace - * -u: unset variables net diagnostic - */ -static char *flag; - -static char *null; /* null value for variable */ -static int intr; /* interrupt pending */ - -static char *trap[_NSIG + 1]; -static char ourtrap[_NSIG + 1]; -static int trapset; /* trap pending */ +static smallint trapset; /* trap pending (signal number) */ -static int heedint; /* heed interrupt signals */ +static smallint yynerrs; /* yacc (flag) */ -static int yynerrs; /* yacc */ +/* moved to G: static char line[LINELIM]; */ -static char line[LINELIM]; -static char *elinep; +#if ENABLE_FEATURE_EDITING +static char *current_prompt; +static line_input_t *line_input_state; +#endif /* * other functions */ -static int (*inbuilt(char *s)) (struct op *); - -static char *rexecve(char *c, char **v, char **envp); -static char *space(int n); -static char *strsave(char *s, int a); +static const char *rexecve(char *c, char **v, char **envp); static char *evalstr(char *cp, int f); static char *putn(int n); static char *unquote(char *as); -static struct var *lookup(char *n); static int rlookup(char *n); static struct wdblock *glob(char *cp, struct wdblock *wb); static int my_getc(int ec); @@ -279,35 +297,21 @@ static void onintr(int s); /* SIGINT handler */ static int newenv(int f); static void quitenv(void); -static void err(char *s); -static int anys(char *s1, char *s2); -static int any(int c, char *s); static void next(int f); static void setdash(void); static void onecommand(void); static void runtrap(int i); -static int gmatch(char *s, char *p); - - -/* - * error handling - */ -static void leave(void); /* abort shell (or fail in subshell) */ -static void fail(void); /* fail but return to process next command */ -static void warn(char *s); -static void sig(int i); /* default signal handler */ - /* -------- area stuff -------- */ -#define REGSIZE sizeof(struct region) -#define GROWBY (256) -/* #define SHRINKBY (64) */ -#undef SHRINKBY -#define FREE (32767) -#define BUSY (0) -#define ALIGN (sizeof(int)-1) +#define REGSIZE sizeof(struct region) +#define GROWBY (256) +/* #define SHRINKBY (64) */ +#undef SHRINKBY +#define FREE (32767) +#define BUSY (0) +#define ALIGN (sizeof(int)-1) struct region { @@ -316,7 +320,6 @@ struct region { }; - /* -------- grammar stuff -------- */ typedef union { char *cp; @@ -325,32 +328,30 @@ typedef union { struct op *o; } YYSTYPE; -#define WORD 256 -#define LOGAND 257 -#define LOGOR 258 -#define BREAK 259 -#define IF 260 -#define THEN 261 -#define ELSE 262 -#define ELIF 263 -#define FI 264 -#define CASE 265 -#define ESAC 266 -#define FOR 267 -#define WHILE 268 -#define UNTIL 269 -#define DO 270 -#define DONE 271 -#define IN 272 +#define WORD 256 +#define LOGAND 257 +#define LOGOR 258 +#define BREAK 259 +#define IF 260 +#define THEN 261 +#define ELSE 262 +#define ELIF 263 +#define FI 264 +#define CASE 265 +#define ESAC 266 +#define FOR 267 +#define WHILE 268 +#define UNTIL 269 +#define DO 270 +#define DONE 271 +#define IN 272 /* Added for "." file expansion */ -#define DOT 273 +#define DOT 273 #define YYERRCODE 300 /* flags to yylex */ -#define CONTIN 01 /* skip new lines to complete command */ - -#define SYNTAXERR zzerr() +#define CONTIN 01 /* skip new lines to complete command */ static struct op *pipeline(int cf); static struct op *andor(void); @@ -375,8 +376,6 @@ static char **copyw(void); static void word(char *cp); static struct ioword **copyio(void); static struct ioword *io(int u, int f, char *cp); -static void zzerr(void); -static void yyerror(char *s); static int yylex(int cf); static int collect(int c, int c1); static int dual(int c); @@ -398,62 +397,42 @@ struct var { #define GETCELL 04 /* name & value space was got with getcell */ static int yyparse(void); -static struct var *lookup(char *n); -static void setval(struct var *vp, char *val); -static void nameval(struct var *vp, char *val, char *name); -static void export(struct var *vp); -static void ronly(struct var *vp); -static int isassign(char *s); -static int checkname(char *cp); -static int assign(char *s, int cf); -static void putvlist(int f, int out); -static int eqname(char *n1, char *n2); - -static int execute(struct op *t, int *pin, int *pout, int act); /* -------- io.h -------- */ /* io buffer */ struct iobuf { - unsigned id; /* buffer id */ - char buf[512]; /* buffer */ - char *bufp; /* pointer into buffer */ - char *ebufp; /* pointer to end of buffer */ + unsigned id; /* buffer id */ + char buf[512]; /* buffer */ + char *bufp; /* pointer into buffer */ + char *ebufp; /* pointer to end of buffer */ }; /* possible arguments to an IO function */ struct ioarg { - char *aword; + const char *aword; char **awordlist; - int afile; /* file descriptor */ - unsigned afid; /* buffer id */ - long afpos; /* file position */ - struct iobuf *afbuf; /* buffer for this file */ + int afile; /* file descriptor */ + unsigned afid; /* buffer id */ + off_t afpos; /* file position */ + struct iobuf *afbuf; /* buffer for this file */ }; -//static struct ioarg ioargstack[NPUSH]; -#define AFID_NOBUF (~0) -#define AFID_ID 0 - /* an input generator's state */ struct io { int (*iofn) (struct ioarg *, struct io *); struct ioarg *argp; int peekc; - char prev; /* previous character read by readc() */ - char nlcount; /* for `'s */ - char xchar; /* for `'s */ - char task; /* reason for pushed IO */ + char prev; /* previous character read by readc() */ + char nlcount; /* for `'s */ + char xchar; /* for `'s */ + char task; /* reason for pushed IO */ }; - -//static struct io iostack[NPUSH]; -#define XOTHER 0 /* none of the below */ -#define XDOLL 1 /* expanding ${} */ -#define XGRAVE 2 /* expanding `'s */ -#define XIO 3 /* file IO */ - -/* in substitution */ -#define INSUB() (e.iop->task == XGRAVE || e.iop->task == XDOLL) +/* ->task: */ +#define XOTHER 0 /* none of the below */ +#define XDOLL 1 /* expanding ${} */ +#define XGRAVE 2 /* expanding `'s */ +#define XIO 3 /* file IO */ /* @@ -477,31 +456,22 @@ static int herein(char *hname, int xdoll); static int run(struct ioarg *argp, int (*f) (struct ioarg *)); -/* - * IO functions - */ static int eofc(void); static int readc(void); static void unget(int c); static void ioecho(char c); -static void prs(const char *s); -static void prn(unsigned u); -static void closef(int i); -static void closeall(void); /* * IO control */ static void pushio(struct ioarg *argp, int (*f) (struct ioarg *)); +#define PUSHIO(what,arg,gen) ((temparg.what = (arg)), pushio(&temparg,(gen))) static int remap(int fd); static int openpipe(int *pv); static void closepipe(int *pv); static struct io *setbase(struct io *ip); -#define PUSHIO(what,arg,gen) ((temparg.what = (arg)),pushio(&temparg,(gen))) -#define RUN(what,arg,gen) ((temparg.what = (arg)), run(&temparg,(gen))) - /* -------- word.h -------- */ #define NSTART 16 /* default number of words to allow for initially */ @@ -517,85 +487,60 @@ static struct wdblock *addword(char *wd, struct wdblock *wb); static struct wdblock *newword(int nw); static char **getwords(struct wdblock *wb); -/* -------- area.h -------- */ - -/* - * storage allocation - */ -static char *getcell(unsigned nbytes); -static void garbage(void); -static void setarea(char *cp, int a); -static int getarea(char *cp); -static void freearea(int a); -static void freecell(char *cp); -static int areanum; /* current allocation area */ - -#define NEW(type) (type *)getcell(sizeof(type)) -#define DELETE(obj) freecell((char *)obj) - - /* -------- misc stuff -------- */ -static int forkexec(struct op *t, int *pin, int *pout, int act, char **wp); +static int dolabel(struct op *t, char **args); +static int dohelp(struct op *t, char **args); +static int dochdir(struct op *t, char **args); +static int doshift(struct op *t, char **args); +static int dologin(struct op *t, char **args); +static int doumask(struct op *t, char **args); +static int doexec(struct op *t, char **args); +static int dodot(struct op *t, char **args); +static int dowait(struct op *t, char **args); +static int doread(struct op *t, char **args); +static int doeval(struct op *t, char **args); +static int dotrap(struct op *t, char **args); +static int dobreak(struct op *t, char **args); +static int doexit(struct op *t, char **args); +static int doexport(struct op *t, char **args); +static int doreadonly(struct op *t, char **args); +static int doset(struct op *t, char **args); +static int dotimes(struct op *t, char **args); +static int docontinue(struct op *t, char **args); + +static int forkexec(struct op *t, int *pin, int *pout, int no_fork, char **wp); +static int execute(struct op *t, int *pin, int *pout, int no_fork); static int iosetup(struct ioword *iop, int pipein, int pipeout); -static void echo(char **wp); -static struct op **find1case(struct op *t, char *w); -static struct op *findcase(struct op *t, char *w); static void brkset(struct brkcon *bc); -static int dolabel(struct op *t); -static int dohelp(struct op *t); -static int dochdir(struct op *t); -static int doshift(struct op *t); -static int dologin(struct op *t); -static int doumask(struct op *t); -static int doexec(struct op *t); -static int dodot(struct op *t); -static int dowait(struct op *t); -static int doread(struct op *t); -static int doeval(struct op *t); -static int dotrap(struct op *t); static int getsig(char *s); static void setsig(int n, sighandler_t f); static int getn(char *as); -static int dobreak(struct op *t); -static int docontinue(struct op *t); static int brkcontin(char *cp, int val); -static int doexit(struct op *t); -static int doexport(struct op *t); -static int doreadonly(struct op *t); static void rdexp(char **wp, void (*f) (struct var *), int key); static void badid(char *s); -static int doset(struct op *t); static void varput(char *s, int out); -static int dotimes(struct op *t); -static int expand(char *cp, struct wdblock **wbp, int f); +static int expand(const char *cp, struct wdblock **wbp, int f); static char *blank(int f); static int dollar(int quoted); static int grave(int quoted); static void globname(char *we, char *pp); static char *generate(char *start1, char *end1, char *middle, char *end); static int anyspcl(struct wdblock *wb); -static int xstrcmp(char *p1, char *p2); -static void glob0(char *a0, unsigned int a1, int a2, - int (*a3) (char *, char *)); -static void glob1(char *base, char *lim); -static void glob2(char *i, char *j); -static void glob3(char *i, char *j, char *k); static void readhere(char **name, char *s, int ec); -static void pushio(struct ioarg *argp, int (*f) (struct ioarg *)); static int xxchar(struct ioarg *ap); struct here { char *h_tag; - int h_dosub; + char h_dosub; struct ioword *h_iop; struct here *h_next; }; -static const char * const signame[] = { +static const char *const signame[] = { "Signal 0", "Hangup", - (char *) NULL, /* interrupt */ + NULL, /* interrupt */ "Quit", "Illegal instruction", "Trace/BPT trap", @@ -606,94 +551,61 @@ static const char * const signame[] = { "SIGUSR1", "SIGSEGV", "SIGUSR2", - (char *) NULL, /* broken pipe */ + NULL, /* broken pipe */ "Alarm clock", - "Terminated", + "Terminated" }; -#define NSIGNAL (sizeof(signame)/sizeof(signame[0])) - -struct res { - const char *r_name; - int r_val; -}; -static const struct res restab[] = { - {"for", FOR}, - {"case", CASE}, - {"esac", ESAC}, - {"while", WHILE}, - {"do", DO}, - {"done", DONE}, - {"if", IF}, - {"in", IN}, - {"then", THEN}, - {"else", ELSE}, - {"elif", ELIF}, - {"until", UNTIL}, - {"fi", FI}, - {";;", BREAK}, - {"||", LOGOR}, - {"&&", LOGAND}, - {"{", '{'}, - {"}", '}'}, - {".", DOT}, - {0, 0}, -}; +typedef int (*builtin_func_ptr)(struct op *, char **); struct builtincmd { const char *name; - int (*builtinfunc) (struct op * t); + builtin_func_ptr builtinfunc; }; + static const struct builtincmd builtincmds[] = { - {".", dodot}, - {":", dolabel}, - {"break", dobreak}, - {"cd", dochdir}, - {"continue", docontinue}, - {"eval", doeval}, - {"exec", doexec}, - {"exit", doexit}, - {"export", doexport}, - {"help", dohelp}, - {"login", dologin}, - {"newgrp", dologin}, - {"read", doread}, - {"readonly", doreadonly}, - {"set", doset}, - {"shift", doshift}, - {"times", dotimes}, - {"trap", dotrap}, - {"umask", doumask}, - {"wait", dowait}, - {0, 0} + { "." , dodot }, + { ":" , dolabel }, + { "break" , dobreak }, + { "cd" , dochdir }, + { "continue", docontinue }, + { "eval" , doeval }, + { "exec" , doexec }, + { "exit" , doexit }, + { "export" , doexport }, + { "help" , dohelp }, + { "login" , dologin }, + { "newgrp" , dologin }, + { "read" , doread }, + { "readonly", doreadonly }, + { "set" , doset }, + { "shift" , doshift }, + { "times" , dotimes }, + { "trap" , dotrap }, + { "umask" , doumask }, + { "wait" , dowait }, + { NULL , NULL }, }; -static struct op *scantree(struct op *); -static struct op *dowholefile(int, int); +static struct op *dowholefile(int /*, int*/); -/* Globals */ -extern char **environ; /* environment pointer */ +/* Globals */ static char **dolv; static int dolc; static int exstat; -static char gflg; -static int interactive; /* Is this an interactive shell */ -static int execflg; -static int multiline; /* \n changed to ; */ -static struct op *outtree; /* result from parser */ +static smallint gflg; /* (seems to be a parse error indicator) */ +static smallint interactive; /* Is this an interactive shell */ +static smallint execflg; +static smallint isbreak; /* "break" statement was seen */ +static int multiline; /* '\n' changed to ';' (counter) */ +static struct op *outtree; /* result from parser */ static xint *failpt; static xint *errpt; static struct brkcon *brklist; -static int isbreak; static struct wdblock *wdlist; static struct wdblock *iolist; -static char *trap[_NSIG + 1]; -static char ourtrap[_NSIG + 1]; -static int trapset; /* trap pending */ -static int yynerrs; /* yacc */ -static char line[LINELIM]; #ifdef MSHDEBUG static struct var *mshdbg_var; @@ -706,61 +618,107 @@ static struct var *path; /* search path for commands */ static struct var *shell; /* shell to interpret command files */ static struct var *ifs; /* field separators */ -static int areanum; /* current allocation area */ -static int intr; +static int areanum; /* current allocation area */ +static smallint intr; /* interrupt pending (bool) */ +static smallint heedint = 1; /* heed interrupt signals (bool) */ static int inparse; -static char flags['z' - 'a' + 1]; -static char *flag = flags - 'a'; -static char *null = ""; -static int heedint = 1; -static void (*qflag) (int) = SIG_IGN; +static char *null = (char*)""; /* null value for variable */ +static void (*qflag)(int) = SIG_IGN; static int startl; static int peeksym; static int nlseen; static int iounit = IODEFAULT; static YYSTYPE yylval; -static char *elinep = line + sizeof(line) - 5; - -static struct ioarg temparg = { 0, 0, 0, AFID_NOBUF, 0 }; /* temporary for PUSHIO */ -static struct ioarg ioargstack[NPUSH]; -static struct io iostack[NPUSH]; -static struct iobuf sharedbuf = { AFID_NOBUF }; -static struct iobuf mainbuf = { AFID_NOBUF }; -static unsigned bufid = AFID_ID; /* buffer id counter */ - -static struct here *inhere; /* list of hear docs while parsing */ -static struct here *acthere; /* list of active here documents */ -static struct region *areabot; /* bottom of area */ -static struct region *areatop; /* top of area */ -static struct region *areanxt; /* starting point of scan */ +static char *elinep; /* done in main(): = line + sizeof(line) - 5 */ + +static struct here *inhere; /* list of hear docs while parsing */ +static struct here *acthere; /* list of active here documents */ +static struct region *areabot; /* bottom of area */ +static struct region *areatop; /* top of area */ +static struct region *areanxt; /* starting point of scan */ static void *brktop; static void *brkaddr; -static struct env e = { - line, /* linep: char ptr */ - iostack, /* iobase: struct io ptr */ - iostack - 1, /* iop: struct io ptr */ - (xint *) NULL, /* errpt: void ptr for errors? */ - FDBASE, /* iofd: file desc */ - (struct env *) NULL /* oenv: struct env ptr */ +#define AFID_NOBUF (~0) +#define AFID_ID 0 + + +/* + * parsing & execution environment + */ +struct env { + char *linep; + struct io *iobase; + struct io *iop; + xint *errpt; /* void * */ + int iofd; + struct env *oenv; +}; + + +struct globals { + struct env global_env; + struct ioarg temparg; // = { .afid = AFID_NOBUF }; /* temporary for PUSHIO */ + unsigned bufid; // = AFID_ID; /* buffer id counter */ + char ourtrap[_NSIG + 1]; + char *trap[_NSIG + 1]; + struct iobuf sharedbuf; /* in main(): set to { AFID_NOBUF } */ + struct iobuf mainbuf; /* in main(): set to { AFID_NOBUF } */ + struct ioarg ioargstack[NPUSH]; + /* + * flags: + * -e: quit on error + * -k: look for name=value everywhere on command line + * -n: no execution + * -t: exit after reading and executing one command + * -v: echo as read + * -x: trace + * -u: unset variables net diagnostic + */ + char flags['z' - 'a' + 1]; + char filechar_cmdbuf[BUFSIZ]; + char line[LINELIM]; + char child_cmd[LINELIM]; + + struct io iostack[NPUSH]; + + char grave__var_name[LINELIM]; + char grave__alt_value[LINELIM]; }; -#ifdef MSHDEBUG -void print_t(struct op *t); -void print_t(struct op *t) -{ - DBGPRINTF(("T: t=%p, type %s, words=%p, IOword=%p\n", t, - T_CMD_NAMES[t->type], t->words, t->ioact)); +#define G (*ptr_to_globals) +#define global_env (G.global_env ) +#define temparg (G.temparg ) +#define bufid (G.bufid ) +#define ourtrap (G.ourtrap ) +#define trap (G.trap ) +#define sharedbuf (G.sharedbuf ) +#define mainbuf (G.mainbuf ) +#define ioargstack (G.ioargstack ) +/* this looks weird, but is OK ... we index FLAG with 'a'...'z' */ +#define FLAG (G.flags - 'a' ) +#define filechar_cmdbuf (G.filechar_cmdbuf) +#define line (G.line ) +#define child_cmd (G.child_cmd ) +#define iostack (G.iostack ) +#define INIT_G() do { \ + SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ + global_env.linep = line; \ + global_env.iobase = iostack; \ + global_env.iop = iostack - 1; \ + global_env.iofd = FDBASE; \ + temparg.afid = AFID_NOBUF; \ + bufid = AFID_ID; \ +} while (0) - if (t->words) { - DBGPRINTF(("T: W1: %s", t->words[0])); - } - return; -} +/* in substitution */ +#define INSUB() (global_env.iop->task == XGRAVE || global_env.iop->task == XDOLL) -void print_tree(struct op *head); -void print_tree(struct op *head) +#define RUN(what, arg, gen) ((temparg.what = (arg)), run(&temparg, (gen))) + +#ifdef MSHDEBUG +static void print_tree(struct op *head) { if (head == NULL) { DBGPRINTF(("PRINT_TREE: no tree\n")); @@ -775,212 +733,514 @@ void print_tree(struct op *head) if (head->right) print_tree(head->right); - - return; } -#endif /* MSHDEBUG */ +#endif /* MSHDEBUG */ -#ifdef CONFIG_FEATURE_COMMAND_EDITING -static char *current_prompt; -#endif - -/* -------- sh.c -------- */ /* - * shell + * IO functions */ +static void prs(const char *s) +{ + if (*s) + write(2, s, strlen(s)); +} - -int msh_main(int argc, char **argv) +static void prn(unsigned u) { - int f; - char *s; - int cflag; - char *name, **ap; - int (*iof) (struct ioarg *); + prs(itoa(u)); +} - DBGPRINTF(("MSH_MAIN: argc %d, environ %p\n", argc, environ)); +static void echo(char **wp) +{ + int i; - initarea(); - if ((ap = environ) != NULL) { - while (*ap) - assign(*ap++, !COPYV); - for (ap = environ; *ap;) - export(lookup(*ap++)); + prs("+"); + for (i = 0; wp[i]; i++) { + if (i) + prs(" "); + prs(wp[i]); } - closeall(); - areanum = 1; + prs("\n"); +} - shell = lookup("SHELL"); - if (shell->value == null) - setval(shell, (char *)DEFAULT_SHELL); - export(shell); +static void closef(int i) +{ + if (i > 2) + close(i); +} - homedir = lookup("HOME"); - if (homedir->value == null) - setval(homedir, "/"); - export(homedir); +static void closeall(void) +{ + int u; - setval(lookup("$"), putn(getpid())); + for (u = NUFILE; u < NOFILE;) + close(u++); +} - path = lookup("PATH"); - if (path->value == null) { - if (geteuid() == 0) - setval(path, "/sbin:/bin:/usr/sbin:/usr/bin"); - else - setval(path, "/bin:/usr/bin"); - } - export(path); - ifs = lookup("IFS"); - if (ifs->value == null) - setval(ifs, " \t\n"); +/* fail but return to process next command */ +static void fail(void) ATTRIBUTE_NORETURN; +static void fail(void) +{ + longjmp(failpt, 1); + /* NOTREACHED */ +} -#ifdef MSHDEBUG - mshdbg_var = lookup("MSHDEBUG"); - if (mshdbg_var->value == null) - setval(mshdbg_var, "0"); -#endif +/* abort shell (or fail in subshell) */ +static void leave(void) ATTRIBUTE_NORETURN; +static void leave(void) +{ + DBGPRINTF(("LEAVE: leave called!\n")); - prompt = lookup("PS1"); -#ifdef CONFIG_FEATURE_SH_FANCY_PROMPT - if (prompt->value == null) -#endif - setval(prompt, DEFAULT_USER_PROMPT); - if (geteuid() == 0) { - setval(prompt, DEFAULT_ROOT_PROMPT); - prompt->status &= ~EXPORT; + if (execflg) + fail(); + scraphere(); + freehere(1); + runtrap(0); + _exit(exstat); + /* NOTREACHED */ +} + +static void warn(const char *s) +{ + if (*s) { + prs(s); + exstat = -1; } - cprompt = lookup("PS2"); -#ifdef CONFIG_FEATURE_SH_FANCY_PROMPT - if (cprompt->value == null) -#endif - setval(cprompt, "> "); + prs("\n"); + if (FLAG['e']) + leave(); +} - iof = filechar; - cflag = 0; - name = *argv++; - if (--argc >= 1) { - if (argv[0][0] == '-' && argv[0][1] != '\0') { - for (s = argv[0] + 1; *s; s++) - switch (*s) { - case 'c': - prompt->status &= ~EXPORT; - cprompt->status &= ~EXPORT; - setval(prompt, ""); - setval(cprompt, ""); - cflag = 1; - if (--argc > 0) - PUSHIO(aword, *++argv, iof = nlchar); - break; +static void err(const char *s) +{ + warn(s); + if (FLAG['n']) + return; + if (!interactive) + leave(); + if (global_env.errpt) + longjmp(global_env.errpt, 1); + closeall(); + global_env.iop = global_env.iobase = iostack; +} - case 'q': - qflag = SIG_DFL; - break; - case 's': - /* standard input */ - break; +/* -------- area.c -------- */ - case 't': - prompt->status &= ~EXPORT; - setval(prompt, ""); - iof = linechar; - break; +/* + * All memory between (char *)areabot and (char *)(areatop+1) is + * exclusively administered by the area management routines. + * It is assumed that sbrk() and brk() manipulate the high end. + */ - case 'i': - interactive++; - default: - if (*s >= 'a' && *s <= 'z') - flag[(int) *s]++; - } - } else { - argv--; - argc++; +#define sbrk(X) ({ \ + void * __q = (void *)-1; \ + if (brkaddr + (int)(X) < brktop) { \ + __q = brkaddr; \ + brkaddr += (int)(X); \ + } \ + __q; \ +}) + +static void initarea(void) +{ + brkaddr = xmalloc(AREASIZE); + brktop = brkaddr + AREASIZE; + + while ((long) sbrk(0) & ALIGN) + sbrk(1); + areabot = (struct region *) sbrk(REGSIZE); + + areabot->next = areabot; + areabot->area = BUSY; + areatop = areabot; + areanxt = areabot; +} + +static char *getcell(unsigned nbytes) +{ + int nregio; + struct region *p, *q; + int i; + + if (nbytes == 0) { + puts("getcell(0)"); + abort(); + } + /* silly and defeats the algorithm */ + /* + * round upwards and add administration area + */ + nregio = (nbytes + (REGSIZE - 1)) / REGSIZE + 1; + p = areanxt; + for (;;) { + if (p->area > areanum) { + /* + * merge free cells + */ + while ((q = p->next)->area > areanum && q != areanxt) + p->next = q->next; + /* + * exit loop if cell big enough + */ + if (q >= p + nregio) + goto found; } + p = p->next; + if (p == areanxt) + break; + } + i = nregio >= GROWBY ? nregio : GROWBY; + p = (struct region *) sbrk(i * REGSIZE); + if (p == (struct region *) -1) + return NULL; + p--; + if (p != areatop) { + puts("not contig"); + abort(); /* allocated areas are contiguous */ + } + q = p + i; + p->next = q; + p->area = FREE; + q->next = areabot; + q->area = BUSY; + areatop = q; + found: + /* + * we found a FREE area big enough, pointed to by 'p', and up to 'q' + */ + areanxt = p + nregio; + if (areanxt < q) { + /* + * split into requested area and rest + */ + if (areanxt + 1 > q) { + puts("OOM"); + abort(); /* insufficient space left for admin */ + } + areanxt->next = q; + areanxt->area = FREE; + p->next = areanxt; + } + p->area = areanum; + return (char *) (p + 1); +} - if (iof == filechar && --argc > 0) { - setval(prompt, ""); - setval(cprompt, ""); - prompt->status &= ~EXPORT; - cprompt->status &= ~EXPORT; +static void freecell(char *cp) +{ + struct region *p; -/* Shell is non-interactive, activate printf-based debug */ -#ifdef MSHDEBUG - mshdbg = (int) (((char) (mshdbg_var->value[0])) - '0'); - if (mshdbg < 0) - mshdbg = 0; + p = (struct region *) cp; + if (p != NULL) { + p--; + if (p < areanxt) + areanxt = p; + p->area = FREE; + } +} +#define DELETE(obj) freecell((char *)obj) + +static void freearea(int a) +{ + struct region *p, *top; + + top = areatop; + for (p = areabot; p != top; p = p->next) + if (p->area >= a) + p->area = FREE; +} + +static void setarea(char *cp, int a) +{ + struct region *p; + + p = (struct region *) cp; + if (p != NULL) + (p - 1)->area = a; +} + +static int getarea(char *cp) +{ + return ((struct region *) cp - 1)->area; +} + +static void garbage(void) +{ + struct region *p, *q, *top; + + top = areatop; + for (p = areabot; p != top; p = p->next) { + if (p->area > areanum) { + while ((q = p->next)->area > areanum) + p->next = q->next; + areanxt = p; + } + } +#ifdef SHRINKBY + if (areatop >= q + SHRINKBY && q->area > areanum) { + brk((char *) (q + 1)); + q->next = areabot; + q->area = BUSY; + areatop = q; + } #endif - DBGPRINTF(("MSH_MAIN: calling newfile()\n")); +} - if (newfile(name = *++argv)) - exit(1); /* Exit on error */ +static void *get_space(int n) +{ + char *cp; + + cp = getcell(n); + if (cp == NULL) + err("out of string space"); + return cp; +} + +static char *strsave(const char *s, int a) +{ + char *cp; + + cp = get_space(strlen(s) + 1); + if (cp == NULL) { +// FIXME: I highly doubt this is good. + return (char*)""; + } + setarea(cp, a); + strcpy(cp, s); + return cp; +} + + +/* -------- var.c -------- */ + +static int eqname(const char *n1, const char *n2) +{ + for (; *n1 != '=' && *n1 != '\0'; n1++) + if (*n2++ != *n1) + return 0; + return *n2 == '\0' || *n2 == '='; +} + +static const char *findeq(const char *cp) +{ + while (*cp != '\0' && *cp != '=') + cp++; + return cp; +} + +/* + * Find the given name in the dictionary + * and return its value. If the name was + * not previously there, enter it now and + * return a null value. + */ +static struct var *lookup(const char *n) +{ +// FIXME: dirty hack + static struct var dummy; + + struct var *vp; + const char *cp; + char *xp; + int c; + + if (isdigit(*n)) { + dummy.name = (char*)n; + for (c = 0; isdigit(*n) && c < 1000; n++) + c = c * 10 + *n - '0'; + dummy.status = RONLY; + dummy.value = (c <= dolc ? dolv[c] : null); + return &dummy; + } + + for (vp = vlist; vp; vp = vp->next) + if (eqname(vp->name, n)) + return vp; + + cp = findeq(n); + vp = get_space(sizeof(*vp)); + if (vp == 0 || (vp->name = get_space((int) (cp - n) + 2)) == NULL) { + dummy.name = dummy.value = (char*)""; + return &dummy; + } + + xp = vp->name; + while ((*xp = *n++) != '\0' && *xp != '=') + xp++; + *xp++ = '='; + *xp = '\0'; + setarea((char *) vp, 0); + setarea((char *) vp->name, 0); + vp->value = null; + vp->next = vlist; + vp->status = GETCELL; + vlist = vp; + return vp; +} + +/* + * if name is not NULL, it must be + * a prefix of the space `val', + * and end with `='. + * this is all so that exporting + * values is reasonably painless. + */ +static void nameval(struct var *vp, const char *val, const char *name) +{ + const char *cp; + char *xp; + int fl; + + if (vp->status & RONLY) { + xp = vp->name; + while (*xp && *xp != '=') + fputc(*xp++, stderr); + err(" is read-only"); + return; + } + fl = 0; + if (name == NULL) { + xp = get_space(strlen(vp->name) + strlen(val) + 2); + if (xp == NULL) + return; + /* make string: name=value */ + setarea(xp, 0); + name = xp; + cp = vp->name; + while ((*xp = *cp++) != '\0' && *xp != '=') + xp++; + *xp++ = '='; + strcpy(xp, val); + val = xp; + fl = GETCELL; + } + if (vp->status & GETCELL) + freecell(vp->name); /* form new string `name=value' */ + vp->name = (char*)name; + vp->value = (char*)val; + vp->status |= fl; +} + +/* + * give variable at `vp' the value `val'. + */ +static void setval(struct var *vp, const char *val) +{ + nameval(vp, val, NULL); +} + +static void export(struct var *vp) +{ + vp->status |= EXPORT; +} + +static void ronly(struct var *vp) +{ + if (isalpha(vp->name[0]) || vp->name[0] == '_') /* not an internal symbol */ + vp->status |= RONLY; +} + +static int isassign(const char *s) +{ + unsigned char c; + DBGPRINTF7(("ISASSIGN: enter, s=%s\n", s)); + + c = *s; + /* no isalpha() - we shouldn't use locale */ + /* c | 0x20 - lowercase (Latin) letters */ + if (c != '_' && (unsigned)((c|0x20) - 'a') > 25) + /* not letter */ + return 0; + + while (1) { + c = *++s; + if (c == '=') + return 1; + if (c == '\0') + return 0; + if (c != '_' + && (unsigned)(c - '0') > 9 /* not number */ + && (unsigned)((c|0x20) - 'a') > 25 /* not letter */ + ) { + return 0; } } +} - setdash(); +static int assign(const char *s, int cf) +{ + const char *cp; + struct var *vp; - /* This won't be true if PUSHIO has been called, say from newfile() above */ - if (e.iop < iostack) { - PUSHIO(afile, 0, iof); - if (isatty(0) && isatty(1) && !cflag) { - interactive++; -#ifndef CONFIG_FEATURE_SH_EXTRA_QUIET -#ifdef MSHDEBUG - printf("\n\n%s Built-in shell (msh with debug)\n", BB_BANNER); -#else - printf("\n\n%s Built-in shell (msh)\n", BB_BANNER); -#endif - printf("Enter 'help' for a list of built-in commands.\n\n"); -#endif + DBGPRINTF7(("ASSIGN: enter, s=%s, cf=%d\n", s, cf)); + + if (!isalpha(*s) && *s != '_') + return 0; + for (cp = s; *cp != '='; cp++) + if (*cp == '\0' || (!isalnum(*cp) && *cp != '_')) + return 0; + vp = lookup(s); + nameval(vp, ++cp, cf == COPYV ? NULL : s); + if (cf != COPYV) + vp->status &= ~GETCELL; + return 1; +} + +static int checkname(char *cp) +{ + DBGPRINTF7(("CHECKNAME: enter, cp=%s\n", cp)); + + if (!isalpha(*cp++) && *(cp - 1) != '_') + return 0; + while (*cp) + if (!isalnum(*cp++) && *(cp - 1) != '_') + return 0; + return 1; +} + +static void putvlist(int f, int out) +{ + struct var *vp; + + for (vp = vlist; vp; vp = vp->next) { + if (vp->status & f && (isalpha(*vp->name) || *vp->name == '_')) { + if (vp->status & EXPORT) + write(out, "export ", 7); + if (vp->status & RONLY) + write(out, "readonly ", 9); + write(out, vp->name, (int) (findeq(vp->name) - vp->name)); + write(out, "\n", 1); } } +} - signal(SIGQUIT, qflag); - if (name && name[0] == '-') { - interactive++; - if ((f = open(".profile", 0)) >= 0) - next(remap(f)); - if ((f = open("/etc/profile", 0)) >= 0) - next(remap(f)); - } - if (interactive) - signal(SIGTERM, sig); - if (signal(SIGINT, SIG_IGN) != SIG_IGN) - signal(SIGINT, onintr); - dolv = argv; - dolc = argc; - dolv[0] = name; - if (dolc > 1) { - for (ap = ++argv; --argc > 0;) { - if (assign(*ap = *argv++, !COPYV)) { - dolc--; /* keyword */ - } else { - ap++; - } - } - } - setval(lookup("#"), putn((--dolc < 0) ? (dolc = 0) : dolc)); +/* + * trap handling + */ +static void sig(int i) +{ + trapset = i; + signal(i, sig); +} - DBGPRINTF(("MSH_MAIN: begin FOR loop, interactive %d, e.iop %p, iostack %p\n", interactive, e.iop, iostack)); +static void runtrap(int i) +{ + char *trapstr; - for (;;) { - if (interactive && e.iop <= iostack) { -#ifdef CONFIG_FEATURE_COMMAND_EDITING - current_prompt = prompt->value; -#else - prs(prompt->value); -#endif - } - onecommand(); - /* Ensure that getenv("PATH") stays current */ - setenv("PATH", path->value, 1); - } + trapstr = trap[i]; + if (trapstr == NULL) + return; - DBGPRINTF(("MSH_MAIN: returning.\n")); + if (i == 0) + trap[i] = NULL; + + RUN(aword, trapstr, nlchar); } + static void setdash(void) { char *cp; @@ -989,9 +1249,9 @@ static void setdash(void) cp = m; for (c = 'a'; c <= 'z'; c++) - if (flag[(int) c]) + if (FLAG[c]) *cp++ = c; - *cp = 0; + *cp = '\0'; setval(lookup("-"), m); } @@ -1001,53 +1261,55 @@ static int newfile(char *s) DBGPRINTF7(("NEWFILE: opening %s\n", s)); - if (strcmp(s, "-") != 0) { + f = 0; + if (NOT_LONE_DASH(s)) { DBGPRINTF(("NEWFILE: s is %s\n", s)); - f = open(s, 0); + f = open(s, O_RDONLY); if (f < 0) { prs(s); err(": cannot open"); - return (1); + return 1; } - } else - f = 0; + } next(remap(f)); - return (0); + return 0; } +#ifdef UNUSED struct op *scantree(struct op *head) { struct op *dotnode; if (head == NULL) - return (NULL); + return NULL; if (head->left != NULL) { dotnode = scantree(head->left); if (dotnode) - return (dotnode); + return dotnode; } if (head->right != NULL) { dotnode = scantree(head->right); if (dotnode) - return (dotnode); + return dotnode; } - if (head->words == NULL) - return (NULL); + if (head->op_words == NULL) + return NULL; DBGPRINTF5(("SCANTREE: checking node %p\n", head)); - if ((head->type != TDOT) && (strcmp(".", head->words[0]) == 0)) { + if ((head->op_type != TDOT) && LONE_CHAR(head->op_words[0], '.')) { DBGPRINTF5(("SCANTREE: dot found in node %p\n", head)); - return (head); + return head; } - return (NULL); + return NULL; } +#endif static void onecommand(void) @@ -1057,29 +1319,30 @@ static void onecommand(void) DBGPRINTF(("ONECOMMAND: enter, outtree=%p\n", outtree)); - while (e.oenv) + while (global_env.oenv) quitenv(); areanum = 1; freehere(areanum); freearea(areanum); garbage(); - wdlist = 0; - iolist = 0; - e.errpt = 0; - e.linep = line; + wdlist = NULL; + iolist = NULL; + global_env.errpt = NULL; + global_env.linep = line; yynerrs = 0; multiline = 0; inparse = 1; intr = 0; execflg = 0; - setjmp(failpt = m1); /* Bruce Evans' fix */ - if (setjmp(failpt = m1) || yyparse() || intr) { - + failpt = m1; + setjmp(failpt); /* Bruce Evans' fix */ + failpt = m1; + if (setjmp(failpt) || yyparse() || intr) { DBGPRINTF(("ONECOMMAND: this is not good.\n")); - while (e.oenv) + while (global_env.oenv) quitenv(); scraphere(); if (!interactive && intr) @@ -1094,10 +1357,10 @@ static void onecommand(void) intr = 0; execflg = 0; - if (!flag['n']) { + if (!FLAG['n']) { DBGPRINTF(("ONECOMMAND: calling execute, t=outtree=%p\n", outtree)); - execute(outtree, NOPIPE, NOPIPE, 0); + execute(outtree, NOPIPE, NOPIPE, /* no_fork: */ 0); } if (!interactive && intr) { @@ -1105,55 +1368,13 @@ static void onecommand(void) leave(); } - if ((i = trapset) != 0) { + i = trapset; + if (i != 0) { trapset = 0; runtrap(i); } } -static void fail(void) -{ - longjmp(failpt, 1); - /* NOTREACHED */ -} - -static void leave(void) -{ - DBGPRINTF(("LEAVE: leave called!\n")); - - if (execflg) - fail(); - scraphere(); - freehere(1); - runtrap(0); - _exit(exstat); - /* NOTREACHED */ -} - -static void warn(char *s) -{ - if (*s) { - prs(s); - exstat = -1; - } - prs("\n"); - if (flag['e']) - leave(); -} - -static void err(char *s) -{ - warn(s); - if (flag['n']) - return; - if (!interactive) - leave(); - if (e.errpt) - longjmp(e.errpt, 1); - closeall(); - e.iop = e.iobase = iostack; -} - static int newenv(int f) { struct env *ep; @@ -1162,20 +1383,20 @@ static int newenv(int f) if (f) { quitenv(); - return (1); + return 1; } - ep = (struct env *) space(sizeof(*ep)); + ep = get_space(sizeof(*ep)); if (ep == NULL) { - while (e.oenv) + while (global_env.oenv) quitenv(); fail(); } - *ep = e; - e.oenv = ep; - e.errpt = errpt; + *ep = global_env; + global_env.oenv = ep; + global_env.errpt = errpt; - return (0); + return 0; } static void quitenv(void) @@ -1183,43 +1404,44 @@ static void quitenv(void) struct env *ep; int fd; - DBGPRINTF(("QUITENV: e.oenv=%p\n", e.oenv)); + DBGPRINTF(("QUITENV: global_env.oenv=%p\n", global_env.oenv)); - if ((ep = e.oenv) != NULL) { - fd = e.iofd; - e = *ep; + ep = global_env.oenv; + if (ep != NULL) { + fd = global_env.iofd; + global_env = *ep; /* should close `'d files */ DELETE(ep); - while (--fd >= e.iofd) + while (--fd >= global_env.iofd) close(fd); } } /* - * Is any character from s1 in s2? + * Is character c in s? */ -static int anys(char *s1, char *s2) +static int any(int c, const char *s) { - while (*s1) - if (any(*s1++, s2)) - return (1); - return (0); + while (*s) + if (*s++ == c) + return 1; + return 0; } /* - * Is character c in s? + * Is any character from s1 in s2? */ -static int any(int c, char *s) +static int anys(const char *s1, const char *s2) { - while (*s) - if (*s++ == c) - return (1); - return (0); + while (*s1) + if (any(*s1++, s2)) + return 1; + return 0; } static char *putn(int n) { - return (itoa(n)); + return itoa(n); } static void next(int f) @@ -1227,7 +1449,7 @@ static void next(int f) PUSHIO(afile, f, filechar); } -static void onintr(int s) /* ANSI C requires a parameter */ +static void onintr(int s ATTRIBUTE_UNUSED) /* ANSI C requires a parameter */ { signal(SIGINT, onintr); intr = 1; @@ -1242,228 +1464,6 @@ static void onintr(int s) /* ANSI C requires a parameter */ } } -static char *space(int n) -{ - char *cp; - - if ((cp = getcell(n)) == 0) - err("out of string space"); - return (cp); -} - -static char *strsave(char *s, int a) -{ - char *cp, *xp; - - if ((cp = space(strlen(s) + 1)) != NULL) { - setarea((char *) cp, a); - for (xp = cp; (*xp++ = *s++) != '\0';); - return (cp); - } - return (""); -} - -/* - * trap handling - */ -static void sig(int i) -{ - trapset = i; - signal(i, sig); -} - -static void runtrap(int i) -{ - char *trapstr; - - if ((trapstr = trap[i]) == NULL) - return; - - if (i == 0) - trap[i] = 0; - - RUN(aword, trapstr, nlchar); -} - -/* -------- var.c -------- */ - -/* - * Find the given name in the dictionary - * and return its value. If the name was - * not previously there, enter it now and - * return a null value. - */ -static struct var *lookup(char *n) -{ - struct var *vp; - char *cp; - int c; - static struct var dummy; - - if (isdigit(*n)) { - dummy.name = n; - for (c = 0; isdigit(*n) && c < 1000; n++) - c = c * 10 + *n - '0'; - dummy.status = RONLY; - dummy.value = c <= dolc ? dolv[c] : null; - return (&dummy); - } - for (vp = vlist; vp; vp = vp->next) - if (eqname(vp->name, n)) - return (vp); - cp = findeq(n); - vp = (struct var *) space(sizeof(*vp)); - if (vp == 0 || (vp->name = space((int) (cp - n) + 2)) == 0) { - dummy.name = dummy.value = ""; - return (&dummy); - } - for (cp = vp->name; (*cp = *n++) && *cp != '='; cp++); - if (*cp == 0) - *cp = '='; - *++cp = 0; - setarea((char *) vp, 0); - setarea((char *) vp->name, 0); - vp->value = null; - vp->next = vlist; - vp->status = GETCELL; - vlist = vp; - return (vp); -} - -/* - * give variable at `vp' the value `val'. - */ -static void setval(struct var *vp, char *val) -{ - nameval(vp, val, (char *) NULL); -} - -/* - * if name is not NULL, it must be - * a prefix of the space `val', - * and end with `='. - * this is all so that exporting - * values is reasonably painless. - */ -static void nameval(struct var *vp, char *val, char *name) -{ - char *cp, *xp; - char *nv; - int fl; - - if (vp->status & RONLY) { - for (xp = vp->name; *xp && *xp != '=';) - putc(*xp++, stderr); - err(" is read-only"); - return; - } - fl = 0; - if (name == NULL) { - xp = space(strlen(vp->name) + strlen(val) + 2); - if (xp == 0) - return; - /* make string: name=value */ - setarea((char *) xp, 0); - name = xp; - for (cp = vp->name; (*xp = *cp++) && *xp != '='; xp++); - if (*xp++ == 0) - xp[-1] = '='; - nv = xp; - for (cp = val; (*xp++ = *cp++) != '\0';); - val = nv; - fl = GETCELL; - } - if (vp->status & GETCELL) - freecell(vp->name); /* form new string `name=value' */ - vp->name = name; - vp->value = val; - vp->status |= fl; -} - -static void export(struct var *vp) -{ - vp->status |= EXPORT; -} - -static void ronly(struct var *vp) -{ - if (isalpha(vp->name[0]) || vp->name[0] == '_') /* not an internal symbol */ - vp->status |= RONLY; -} - -static int isassign(char *s) -{ - DBGPRINTF7(("ISASSIGN: enter, s=%s\n", s)); - - if (!isalpha((int) *s) && *s != '_') - return (0); - for (; *s != '='; s++) - if (*s == 0 || (!isalnum(*s) && *s != '_')) - return (0); - - return (1); -} - -static int assign(char *s, int cf) -{ - char *cp; - struct var *vp; - - DBGPRINTF7(("ASSIGN: enter, s=%s, cf=%d\n", s, cf)); - - if (!isalpha(*s) && *s != '_') - return (0); - for (cp = s; *cp != '='; cp++) - if (*cp == 0 || (!isalnum(*cp) && *cp != '_')) - return (0); - vp = lookup(s); - nameval(vp, ++cp, cf == COPYV ? (char *) NULL : s); - if (cf != COPYV) - vp->status &= ~GETCELL; - return (1); -} - -static int checkname(char *cp) -{ - DBGPRINTF7(("CHECKNAME: enter, cp=%s\n", cp)); - - if (!isalpha(*cp++) && *(cp - 1) != '_') - return (0); - while (*cp) - if (!isalnum(*cp++) && *(cp - 1) != '_') - return (0); - return (1); -} - -static void putvlist(int f, int out) -{ - struct var *vp; - - for (vp = vlist; vp; vp = vp->next) - if (vp->status & f && (isalpha(*vp->name) || *vp->name == '_')) { - if (vp->status & EXPORT) - write(out, "export ", 7); - if (vp->status & RONLY) - write(out, "readonly ", 9); - write(out, vp->name, (int) (findeq(vp->name) - vp->name)); - write(out, "\n", 1); - } -} - -static int eqname(char *n1, char *n2) -{ - for (; *n1 != '=' && *n1 != 0; n1++) - if (*n2++ != *n1) - return (0); - return (*n2 == 0 || *n2 == '='); -} - -static char *findeq(char *cp) -{ - while (*cp != '\0' && *cp != '=') - cp++; - return (cp); -} /* -------- gmatch.c -------- */ /* @@ -1475,222 +1475,94 @@ static char *findeq(char *cp) #define CMASK 0377 #define QUOTE 0200 -#define QMASK (CMASK&~QUOTE) +#define QMASK (CMASK & ~QUOTE) #define NOT '!' /* might use ^ */ -static int gmatch(char *s, char *p) +static const char *cclass(const char *p, int sub) +{ + int c, d, not, found; + + not = (*p == NOT); + if (not != 0) + p++; + found = not; + do { + if (*p == '\0') + return NULL; + c = *p & CMASK; + if (p[1] == '-' && p[2] != ']') { + d = p[2] & CMASK; + p++; + } else + d = c; + if (c == sub || (c <= sub && sub <= d)) + found = !not; + } while (*++p != ']'); + return found ? p + 1 : NULL; +} + +static int gmatch(const char *s, const char *p) { int sc, pc; if (s == NULL || p == NULL) - return (0); + return 0; + while ((pc = *p++ & CMASK) != '\0') { sc = *s++ & QMASK; switch (pc) { case '[': - if ((p = cclass(p, sc)) == NULL) - return (0); + p = cclass(p, sc); + if (p == NULL) + return 0; break; case '?': if (sc == 0) - return (0); + return 0; break; case '*': s--; do { if (*p == '\0' || gmatch(s, p)) - return (1); + return 1; } while (*s++ != '\0'); - return (0); + return 0; default: if (sc != (pc & ~QUOTE)) - return (0); + return 0; } } - return (*s == 0); -} - -static char *cclass(char *p, int sub) -{ - int c, d, not, found; - - if ((not = *p == NOT) != 0) - p++; - found = not; - do { - if (*p == '\0') - return ((char *) NULL); - c = *p & CMASK; - if (p[1] == '-' && p[2] != ']') { - d = p[2] & CMASK; - p++; - } else - d = c; - if (c == sub || (c <= sub && sub <= d)) - found = !not; - } while (*++p != ']'); - return (found ? p + 1 : (char *) NULL); + return *s == '\0'; } -/* -------- area.c -------- */ - +/* -------- csyn.c -------- */ /* - * All memory between (char *)areabot and (char *)(areatop+1) is - * exclusively administered by the area management routines. - * It is assumed that sbrk() and brk() manipulate the high end. + * shell: syntax (C version) */ -#define sbrk(X) ({ void * __q = (void *)-1; if (brkaddr + (int)(X) < brktop) { __q = brkaddr; brkaddr+=(int)(X); } __q;}) - -static void initarea(void) -{ - brkaddr = xmalloc(AREASIZE); - brktop = brkaddr + AREASIZE; - - while ((long) sbrk(0) & ALIGN) - sbrk(1); - areabot = (struct region *) sbrk(REGSIZE); - - areabot->next = areabot; - areabot->area = BUSY; - areatop = areabot; - areanxt = areabot; -} - -char *getcell(unsigned nbytes) -{ - int nregio; - struct region *p, *q; - int i; - - if (nbytes == 0) { - puts("getcell(0)"); - abort(); - } - /* silly and defeats the algorithm */ - /* - * round upwards and add administration area - */ - nregio = (nbytes + (REGSIZE - 1)) / REGSIZE + 1; - for (p = areanxt;;) { - if (p->area > areanum) { - /* - * merge free cells - */ - while ((q = p->next)->area > areanum && q != areanxt) - p->next = q->next; - /* - * exit loop if cell big enough - */ - if (q >= p + nregio) - goto found; - } - p = p->next; - if (p == areanxt) - break; - } - i = nregio >= GROWBY ? nregio : GROWBY; - p = (struct region *) sbrk(i * REGSIZE); - if (p == (struct region *) -1) - return ((char *) NULL); - p--; - if (p != areatop) { - puts("not contig"); - abort(); /* allocated areas are contiguous */ - } - q = p + i; - p->next = q; - p->area = FREE; - q->next = areabot; - q->area = BUSY; - areatop = q; - found: - /* - * we found a FREE area big enough, pointed to by 'p', and up to 'q' - */ - areanxt = p + nregio; - if (areanxt < q) { - /* - * split into requested area and rest - */ - if (areanxt + 1 > q) { - puts("OOM"); - abort(); /* insufficient space left for admin */ - } - areanxt->next = q; - areanxt->area = FREE; - p->next = areanxt; - } - p->area = areanum; - return ((char *) (p + 1)); -} - -static void freecell(char *cp) +static void yyerror(const char *s) ATTRIBUTE_NORETURN; +static void yyerror(const char *s) { - struct region *p; - - if ((p = (struct region *) cp) != NULL) { - p--; - if (p < areanxt) - areanxt = p; - p->area = FREE; + yynerrs = 1; + if (interactive && global_env.iop <= iostack) { + multiline = 0; + while (eofc() == 0 && yylex(0) != '\n') + continue; } + err(s); + fail(); } -static void freearea(int a) -{ - struct region *p, *top; - - top = areatop; - for (p = areabot; p != top; p = p->next) - if (p->area >= a) - p->area = FREE; -} - -static void setarea(char *cp, int a) -{ - struct region *p; - - if ((p = (struct region *) cp) != NULL) - (p - 1)->area = a; -} - -int getarea(char *cp) -{ - return ((struct region *) cp - 1)->area; -} - -static void garbage(void) +static void zzerr(void) ATTRIBUTE_NORETURN; +static void zzerr(void) { - struct region *p, *q, *top; - - top = areatop; - for (p = areabot; p != top; p = p->next) { - if (p->area > areanum) { - while ((q = p->next)->area > areanum) - p->next = q->next; - areanxt = p; - } - } -#ifdef SHRINKBY - if (areatop >= q + SHRINKBY && q->area > areanum) { - brk((char *) (q + 1)); - q->next = areabot; - q->area = BUSY; - areatop = q; - } -#endif + yyerror("syntax error"); } -/* -------- csyn.c -------- */ -/* - * shell: syntax (C version) - */ - int yyparse(void) { DBGPRINTF7(("YYPARSE: enter...\n")); @@ -1700,7 +1572,7 @@ int yyparse(void) yynerrs = 0; outtree = c_list(); musthave('\n', 0); - return (yynerrs != 0); + return yynerrs; /* 0/1 */ } static struct op *pipeline(int cf) @@ -1716,12 +1588,13 @@ static struct op *pipeline(int cf) if (t != NULL) { while ((c = yylex(0)) == '|') { - if ((p = command(CONTIN)) == NULL) { + p = command(CONTIN); + if (p == NULL) { DBGPRINTF8(("PIPELINE: error!\n")); - SYNTAXERR; + zzerr(); } - if (t->type != TPAREN && t->type != TCOM) { + if (t->op_type != TPAREN && t->op_type != TCOM) { /* shell statement */ t = block(TPAREN, t, NOBLOCK, NOWORDS); } @@ -1732,7 +1605,7 @@ static struct op *pipeline(int cf) } DBGPRINTF7(("PIPELINE: returning t=%p\n", t)); - return (t); + return t; } static struct op *andor(void) @@ -1748,19 +1621,20 @@ static struct op *andor(void) if (t != NULL) { while ((c = yylex(0)) == LOGAND || c == LOGOR) { - if ((p = pipeline(CONTIN)) == NULL) { + p = pipeline(CONTIN); + if (p == NULL) { DBGPRINTF8(("ANDOR: error!\n")); - SYNTAXERR; + zzerr(); } t = block(c == LOGAND ? TAND : TOR, t, p, NOWORDS); - } /* WHILE */ + } peeksym = c; } DBGPRINTF7(("ANDOR: returning t=%p\n", t)); - return (t); + return t; } static struct op *c_list(void) @@ -1773,16 +1647,19 @@ static struct op *c_list(void) t = andor(); if (t != NULL) { - if ((peeksym = yylex(0)) == '&') + peeksym = yylex(0); + if (peeksym == '&') t = block(TASYNC, t, NOBLOCK, NOWORDS); while ((c = yylex(0)) == ';' || c == '&' - || (multiline && c == '\n')) { - - if ((p = andor()) == NULL) - return (t); - - if ((peeksym = yylex(0)) == '&') + || (multiline && c == '\n') + ) { + p = andor(); + if (p== NULL) + return t; + + peeksym = yylex(0); + if (peeksym == '&') p = block(TASYNC, p, NOBLOCK, NOWORDS); t = list(t, p); @@ -1792,7 +1669,7 @@ static struct op *c_list(void) } /* IF */ DBGPRINTF7(("C_LIST: returning t=%p\n", t)); - return (t); + return t; } static int synio(int cf) @@ -1803,9 +1680,10 @@ static int synio(int cf) DBGPRINTF7(("SYNIO: enter, cf=%d\n", cf)); - if ((c = yylex(cf)) != '<' && c != '>') { + c = yylex(cf); + if (c != '<' && c != '>') { peeksym = c; - return (0); + return 0; } i = yylval.i; @@ -1817,14 +1695,15 @@ static int synio(int cf) markhere(yylval.cp, iop); DBGPRINTF7(("SYNIO: returning 1\n")); - return (1); + return 1; } static void musthave(int c, int cf) { - if ((peeksym = yylex(cf)) != c) { + peeksym = yylex(cf); + if (peeksym != c) { DBGPRINTF7(("MUSTHAVE: error!\n")); - SYNTAXERR; + zzerr(); } peeksym = 0; @@ -1845,14 +1724,14 @@ static struct op *simple(void) case WORD: if (t == NULL) { t = newtp(); - t->type = TCOM; + t->op_type = TCOM; } peeksym = 0; word(yylval.cp); break; default: - return (t); + return t; } } } @@ -1867,7 +1746,7 @@ static struct op *nested(int type, int mark) t = c_list(); musthave(mark, 0); multiline--; - return (block(type, t, NOBLOCK, NOWORDS)); + return block(type, t, NOBLOCK, NOWORDS); } static struct op *command(int cf) @@ -1892,11 +1771,12 @@ static struct op *command(int cf) switch (c) { default: peeksym = c; - if ((t = simple()) == NULL) { + t = simple(); + if (t == NULL) { if (iolist == NULL) - return ((struct op *) NULL); + return NULL; t = newtp(); - t->type = TCOM; + t->op_type = TCOM; } break; @@ -1910,13 +1790,14 @@ static struct op *command(int cf) case FOR: t = newtp(); - t->type = TFOR; + t->op_type = TFOR; musthave(WORD, 0); startl = 1; t->str = yylval.cp; multiline++; - t->words = wordlist(); - if ((c = yylex(0)) != '\n' && c != ';') + t->op_words = wordlist(); + c = yylex(0); + if (c != '\n' && c != ';') peeksym = c; t->left = dogroup(0); multiline--; @@ -1926,16 +1807,16 @@ static struct op *command(int cf) case UNTIL: multiline++; t = newtp(); - t->type = c == WHILE ? TWHILE : TUNTIL; + t->op_type = (c == WHILE ? TWHILE : TUNTIL); t->left = c_list(); t->right = dogroup(1); - t->words = NULL; + /* t->op_words = NULL; - newtp() did this */ multiline--; break; case CASE: t = newtp(); - t->type = TCASE; + t->op_type = TCASE; musthave(WORD, 0); t->str = yylval.cp; startl++; @@ -1952,7 +1833,7 @@ static struct op *command(int cf) case IF: multiline++; t = newtp(); - t->type = TIF; + t->op_type = TIF; t->left = c_list(); t->right = thenpart(); musthave(FI, 0); @@ -1961,40 +1842,41 @@ static struct op *command(int cf) case DOT: t = newtp(); - t->type = TDOT; + t->op_type = TDOT; - musthave(WORD, 0); /* gets name of file */ + musthave(WORD, 0); /* gets name of file */ DBGPRINTF7(("COMMAND: DOT clause, yylval.cp is %s\n", yylval.cp)); - word(yylval.cp); /* add word to wdlist */ - word(NOWORD); /* terminate wdlist */ - t->words = copyw(); /* dup wdlist */ + word(yylval.cp); /* add word to wdlist */ + word(NOWORD); /* terminate wdlist */ + t->op_words = copyw(); /* dup wdlist */ break; } - while (synio(0)); + while (synio(0)) + continue; t = namelist(t); iolist = iosave; DBGPRINTF(("COMMAND: returning %p\n", t)); - return (t); + return t; } -static struct op *dowholefile(int type, int mark) +static struct op *dowholefile(int type /*, int mark*/) { struct op *t; - DBGPRINTF(("DOWHOLEFILE: enter, type=%d, mark=%d\n", type, mark)); + DBGPRINTF(("DOWHOLEFILE: enter, type=%d\n", type /*, mark*/)); multiline++; t = c_list(); multiline--; t = block(type, t, NOBLOCK, NOWORDS); DBGPRINTF(("DOWHOLEFILE: return t=%p\n", t)); - return (t); + return t; } static struct op *dogroup(int onlydone) @@ -2004,12 +1886,12 @@ static struct op *dogroup(int onlydone) c = yylex(CONTIN); if (c == DONE && onlydone) - return ((struct op *) NULL); + return NULL; if (c != DO) - SYNTAXERR; + zzerr(); mylist = c_list(); musthave(DONE, 0); - return (mylist); + return mylist; } static struct op *thenpart(void) @@ -2017,17 +1899,18 @@ static struct op *thenpart(void) int c; struct op *t; - if ((c = yylex(0)) != THEN) { + c = yylex(0); + if (c != THEN) { peeksym = c; - return ((struct op *) NULL); + return NULL; } t = newtp(); - t->type = 0; + /*t->op_type = 0; - newtp() did this */ t->left = c_list(); if (t->left == NULL) - SYNTAXERR; + zzerr(); t->right = elsepart(); - return (t); + return t; } static struct op *elsepart(void) @@ -2037,20 +1920,21 @@ static struct op *elsepart(void) switch (c = yylex(0)) { case ELSE: - if ((t = c_list()) == NULL) - SYNTAXERR; - return (t); + t = c_list(); + if (t == NULL) + zzerr(); + return t; case ELIF: t = newtp(); - t->type = TELIF; + t->op_type = TELIF; t->left = c_list(); t->right = thenpart(); - return (t); + return t; default: peeksym = c; - return ((struct op *) NULL); + return NULL; } } @@ -2065,7 +1949,7 @@ static struct op *caselist(void) } DBGPRINTF(("CASELIST, returning t=%p\n", t)); - return (t); + return t; } static struct op *casepart(void) @@ -2075,16 +1959,17 @@ static struct op *casepart(void) DBGPRINTF7(("CASEPART: enter...\n")); t = newtp(); - t->type = TPAT; - t->words = pattern(); + t->op_type = TPAT; + t->op_words = pattern(); musthave(')', 0); t->left = c_list(); - if ((peeksym = yylex(CONTIN)) != ESAC) + peeksym = yylex(CONTIN); + if (peeksym != ESAC) musthave(BREAK, CONTIN); DBGPRINTF7(("CASEPART: made newtp(TPAT, t=%p)\n", t)); - return (t); + return t; } static char **pattern(void) @@ -2096,27 +1981,29 @@ static char **pattern(void) musthave(WORD, cf); word(yylval.cp); cf = 0; - } while ((c = yylex(0)) == '|'); + c = yylex(0); + } while (c == '|'); peeksym = c; word(NOWORD); - return (copyw()); + return copyw(); } static char **wordlist(void) { int c; - if ((c = yylex(0)) != IN) { + c = yylex(0); + if (c != IN) { peeksym = c; - return ((char **) NULL); + return NULL; } startl = 0; while ((c = yylex(0)) == WORD) word(yylval.cp); word(NOWORD); peeksym = c; - return (copyw()); + return copyw(); } /* @@ -2127,11 +2014,11 @@ static struct op *list(struct op *t1, struct op *t2) DBGPRINTF7(("LIST: enter, t1=%p, t2=%p\n", t1, t2)); if (t1 == NULL) - return (t2); + return t2; if (t2 == NULL) - return (t1); + return t1; - return (block(TLIST, t1, t2, NOWORDS)); + return block(TLIST, t1, t2, NOWORDS); } static struct op *block(int type, struct op *t1, struct op *t2, char **wp) @@ -2141,32 +2028,58 @@ static struct op *block(int type, struct op *t1, struct op *t2, char **wp) DBGPRINTF7(("BLOCK: enter, type=%d (%s)\n", type, T_CMD_NAMES[type])); t = newtp(); - t->type = type; + t->op_type = type; t->left = t1; t->right = t2; - t->words = wp; + t->op_words = wp; - DBGPRINTF7(("BLOCK: inserted %p between %p and %p\n", t, t1, - t2)); + DBGPRINTF7(("BLOCK: inserted %p between %p and %p\n", t, t1, t2)); - return (t); + return t; } /* See if given string is a shell multiline (FOR, IF, etc) */ static int rlookup(char *n) { + struct res { + char r_name[6]; + int16_t r_val; + }; + static const struct res restab[] = { + { "for" , FOR }, + { "case" , CASE }, + { "esac" , ESAC }, + { "while", WHILE }, + { "do" , DO }, + { "done" , DONE }, + { "if" , IF }, + { "in" , IN }, + { "then" , THEN }, + { "else" , ELSE }, + { "elif" , ELIF }, + { "until", UNTIL }, + { "fi" , FI }, + { ";;" , BREAK }, + { "||" , LOGOR }, + { "&&" , LOGAND }, + { "{" , '{' }, + { "}" , '}' }, + { "." , DOT }, + { }, + }; + const struct res *rp; DBGPRINTF7(("RLOOKUP: enter, n is %s\n", n)); - for (rp = restab; rp->r_name; rp++) + for (rp = restab; rp->r_name[0]; rp++) if (strcmp(rp->r_name, n) == 0) { DBGPRINTF7(("RLOOKUP: match, returning %d\n", rp->r_val)); - return (rp->r_val); /* Return numeric code for shell multiline */ + return rp->r_val; /* Return numeric code for shell multiline */ } DBGPRINTF7(("RLOOKUP: NO match, returning 0\n")); - return (0); /* Not a shell multiline */ + return 0; /* Not a shell multiline */ } static struct op *newtp(void) @@ -2174,23 +2087,17 @@ static struct op *newtp(void) struct op *t; t = (struct op *) tree(sizeof(*t)); - t->type = 0; - t->words = NULL; - t->ioact = NULL; - t->left = NULL; - t->right = NULL; - t->str = NULL; + memset(t, 0, sizeof(*t)); DBGPRINTF3(("NEWTP: allocated %p\n", t)); - return (t); + return t; } static struct op *namelist(struct op *t) { - DBGPRINTF7(("NAMELIST: enter, t=%p, type %s, iolist=%p\n", t, - T_CMD_NAMES[t->type], iolist)); + T_CMD_NAMES[t->op_type], iolist)); if (iolist) { iolist = addword((char *) NULL, iolist); @@ -2198,20 +2105,19 @@ static struct op *namelist(struct op *t) } else t->ioact = NULL; - if (t->type != TCOM) { - if (t->type != TPAREN && t->ioact != NULL) { + if (t->op_type != TCOM) { + if (t->op_type != TPAREN && t->ioact != NULL) { t = block(TPAREN, t, NOBLOCK, NOWORDS); t->ioact = t->left->ioact; t->left->ioact = NULL; } - return (t); + return t; } word(NOWORD); - t->words = copyw(); - + t->op_words = copyw(); - return (t); + return t; } static char **copyw(void) @@ -2219,8 +2125,8 @@ static char **copyw(void) char **wd; wd = getwords(wdlist); - wdlist = 0; - return (wd); + wdlist = NULL; + return wd; } static void word(char *cp) @@ -2233,8 +2139,8 @@ static struct ioword **copyio(void) struct ioword **iop; iop = (struct ioword **) getwords(iolist); - iolist = 0; - return (iop); + iolist = NULL; + return iop; } static struct ioword *io(int u, int f, char *cp) @@ -2242,27 +2148,11 @@ static struct ioword *io(int u, int f, char *cp) struct ioword *iop; iop = (struct ioword *) tree(sizeof(*iop)); - iop->io_unit = u; + iop->io_fd = u; iop->io_flag = f; iop->io_name = cp; iolist = addword((char *) iop, iolist); - return (iop); -} - -static void zzerr(void) -{ - yyerror("syntax error"); -} - -static void yyerror(char *s) -{ - yynerrs++; - if (interactive && e.iop <= iostack) { - multiline = 0; - while (eofc() == 0 && yylex(0) != '\n'); - } - err(s); - fail(); + return iop; } static int yylex(int cf) @@ -2270,55 +2160,59 @@ static int yylex(int cf) int c, c1; int atstart; - if ((c = peeksym) > 0) { + c = peeksym; + if (c > 0) { peeksym = 0; if (c == '\n') startl = 1; - return (c); + return c; } - nlseen = 0; atstart = startl; startl = 0; yylval.i = 0; - e.linep = line; + global_env.linep = line; /* MALAMO */ line[LINELIM - 1] = '\0'; - loop: + loop: while ((c = my_getc(0)) == ' ' || c == '\t') /* Skip whitespace */ - ; + continue; switch (c) { default: if (any(c, "0123456789")) { - unget(c1 = my_getc(0)); + c1 = my_getc(0); + unget(c1); if (c1 == '<' || c1 == '>') { iounit = c - '0'; goto loop; } - *e.linep++ = c; + *global_env.linep++ = c; c = c1; } break; - case '#': /* Comment, skip to next newline or End-of-string */ - while ((c = my_getc(0)) != 0 && c != '\n'); + case '#': /* Comment, skip to next newline or End-of-string */ + while ((c = my_getc(0)) != '\0' && c != '\n') + continue; unget(c); goto loop; case 0: DBGPRINTF5(("YYLEX: return 0, c=%d\n", c)); - return (c); + return c; case '$': DBGPRINTF9(("YYLEX: found $\n")); - *e.linep++ = c; - if ((c = my_getc(0)) == '{') { - if ((c = collect(c, '}')) != '\0') - return (c); + *global_env.linep++ = c; + c = my_getc(0); + if (c == '{') { + c = collect(c, '}'); + if (c != '\0') + return c; goto pack; } break; @@ -2326,8 +2220,9 @@ static int yylex(int cf) case '`': case '\'': case '"': - if ((c = collect(c, c)) != '\0') - return (c); + c = collect(c, c); + if (c != '\0') + return c; goto pack; case '|': @@ -2335,26 +2230,26 @@ static int yylex(int cf) case ';': startl = 1; /* If more chars process them, else return NULL char */ - if ((c1 = dual(c)) != '\0') - return (c1); - else - return (c); + c1 = dual(c); + if (c1 != '\0') + return c1; + return c; case '^': startl = 1; - return ('|'); + return '|'; case '>': case '<': diag(c); - return (c); + return c; case '\n': nlseen++; gethere(); startl = 1; if (multiline || cf & CONTIN) { - if (interactive && e.iop <= iostack) { -#ifdef CONFIG_FEATURE_COMMAND_EDITING + if (interactive && global_env.iop <= iostack) { +#if ENABLE_FEATURE_EDITING current_prompt = cprompt->value; #else prs(cprompt->value); @@ -2363,22 +2258,22 @@ static int yylex(int cf) if (cf & CONTIN) goto loop; } - return (c); + return c; case '(': case ')': startl = 1; - return (c); + return c; } unget(c); - pack: - while ((c = my_getc(0)) != 0 && !any(c, "`$ '\"\t;&<>()|^\n")) { - if (e.linep >= elinep) + pack: + while ((c = my_getc(0)) != '\0' && !any(c, "`$ '\"\t;&<>()|^\n")) { + if (global_env.linep >= elinep) err("word too long"); else - *e.linep++ = c; + *global_env.linep++ = c; }; unget(c); @@ -2386,15 +2281,18 @@ static int yylex(int cf) if (any(c, "\"'`$")) goto loop; - *e.linep++ = '\0'; + *global_env.linep++ = '\0'; - if (atstart && (c = rlookup(line)) != 0) { - startl = 1; - return (c); + if (atstart) { + c = rlookup(line); + if (c != 0) { + startl = 1; + return c; + } } yylval.cp = strsave(line, areanum); - return (WORD); + return WORD; } @@ -2404,7 +2302,7 @@ static int collect(int c, int c1) DBGPRINTF8(("COLLECT: enter, c=%d, c1=%d\n", c, c1)); - *e.linep++ = c; + *global_env.linep++ = c; while ((c = my_getc(c1)) != c1) { if (c == 0) { unget(c); @@ -2412,23 +2310,23 @@ static int collect(int c, int c1) s[1] = 0; prs("no closing "); yyerror(s); - return (YYERRCODE); + return YYERRCODE; } - if (interactive && c == '\n' && e.iop <= iostack) { -#ifdef CONFIG_FEATURE_COMMAND_EDITING + if (interactive && c == '\n' && global_env.iop <= iostack) { +#if ENABLE_FEATURE_EDITING current_prompt = cprompt->value; #else prs(cprompt->value); #endif } - *e.linep++ = c; + *global_env.linep++ = c; } - *e.linep++ = c; + *global_env.linep++ = c; DBGPRINTF8(("COLLECT: return 0, line is %s\n", line)); - return (0); + return 0; } /* "multiline commands" helper func */ @@ -2440,15 +2338,15 @@ static int dual(int c) DBGPRINTF8(("DUAL: enter, c=%d\n", c)); - *cp++ = c; /* c is the given "peek" char */ - *cp++ = my_getc(0); /* get next char of input */ - *cp = 0; /* add EOS marker */ + *cp++ = c; /* c is the given "peek" char */ + *cp++ = my_getc(0); /* get next char of input */ + *cp = '\0'; /* add EOS marker */ - c = rlookup(s); /* see if 2 chars form a shell multiline */ + c = rlookup(s); /* see if 2 chars form a shell multiline */ if (c == 0) - unget(*--cp); /* String is not a shell multiline, put peek char back */ + unget(*--cp); /* String is not a shell multiline, put peek char back */ - return (c); /* String is multiline, return numeric multiline (restab) code */ + return c; /* String is multiline, return numeric multiline (restab) code */ } static void diag(int ec) @@ -2461,10 +2359,10 @@ static void diag(int ec) if (c == '>' || c == '<') { if (c != ec) zzerr(); - yylval.i = ec == '>' ? IOWRITE | IOCAT : IOHERE; + yylval.i = (ec == '>' ? IOWRITE | IOCAT : IOHERE); c = my_getc(0); } else - yylval.i = ec == '>' ? IOWRITE : IOREAD; + yylval.i = (ec == '>' ? IOWRITE : IOREAD); if (c != '&' || yylval.i == IOHERE) unget(c); else @@ -2475,30 +2373,78 @@ static char *tree(unsigned size) { char *t; - if ((t = getcell(size)) == NULL) { + t = getcell(size); + if (t == NULL) { DBGPRINTF2(("TREE: getcell(%d) failed!\n", size)); prs("command line too complicated\n"); fail(); /* NOTREACHED */ } - return (t); + return t; } + /* VARARGS1 */ /* ARGSUSED */ /* -------- exec.c -------- */ +static struct op **find1case(struct op *t, const char *w) +{ + struct op *t1; + struct op **tp; + char **wp; + char *cp; + + if (t == NULL) { + DBGPRINTF3(("FIND1CASE: enter, t==NULL, returning.\n")); + return NULL; + } + + DBGPRINTF3(("FIND1CASE: enter, t->op_type=%d (%s)\n", t->op_type, + T_CMD_NAMES[t->op_type])); + + if (t->op_type == TLIST) { + tp = find1case(t->left, w); + if (tp != NULL) { + DBGPRINTF3(("FIND1CASE: found one to the left, returning tp=%p\n", tp)); + return tp; + } + t1 = t->right; /* TPAT */ + } else + t1 = t; + + for (wp = t1->op_words; *wp;) { + cp = evalstr(*wp++, DOSUB); + if (cp && gmatch(w, cp)) { + DBGPRINTF3(("FIND1CASE: returning &t1->left= %p.\n", + &t1->left)); + return &t1->left; + } + } + + DBGPRINTF(("FIND1CASE: returning NULL\n")); + return NULL; +} + +static struct op *findcase(struct op *t, const char *w) +{ + struct op **tp; + + tp = find1case(t, w); + return tp != NULL ? *tp : NULL; +} + /* * execute tree */ - -static int execute(struct op *t, int *pin, int *pout, int act) +static int execute(struct op *t, int *pin, int *pout, int no_fork) { struct op *t1; volatile int i, rv, a; - char *cp, **wp, **wp2; + const char *cp; + char **wp, **wp2; struct var *vp; struct op *outtree_save; struct brkcon bc; @@ -2510,87 +2456,74 @@ static int execute(struct op *t, int *pin, int *pout, int act) if (t == NULL) { DBGPRINTF4(("EXECUTE: enter, t==null, returning.\n")); - return (0); + return 0; } - DBGPRINTF(("EXECUTE: t=%p, t->type=%d (%s), t->words is %s\n", t, - t->type, T_CMD_NAMES[t->type], - ((t->words == NULL) ? "NULL" : t->words[0]))); + DBGPRINTF(("EXECUTE: t=%p, t->op_type=%d (%s), t->op_words is %s\n", t, + t->op_type, T_CMD_NAMES[t->op_type], + ((t->op_words == NULL) ? "NULL" : t->op_words[0]))); rv = 0; a = areanum++; - wp = (wp2 = t->words) != NULL - ? eval(wp2, t->type == TCOM ? DOALL : DOALL & ~DOKEY) + wp2 = t->op_words; + wp = (wp2 != NULL) + ? eval(wp2, t->op_type == TCOM ? DOALL : DOALL & ~DOKEY) : NULL; - switch (t->type) { + switch (t->op_type) { case TDOT: DBGPRINTF3(("EXECUTE: TDOT\n")); outtree_save = outtree; - newfile(evalstr(t->words[0], DOALL)); + newfile(evalstr(t->op_words[0], DOALL)); - t->left = dowholefile(TLIST, 0); + t->left = dowholefile(TLIST /*, 0*/); t->right = NULL; outtree = outtree_save; if (t->left) - rv = execute(t->left, pin, pout, 0); + rv = execute(t->left, pin, pout, /* no_fork: */ 0); if (t->right) - rv = execute(t->right, pin, pout, 0); + rv = execute(t->right, pin, pout, /* no_fork: */ 0); break; case TPAREN: - rv = execute(t->left, pin, pout, 0); + rv = execute(t->left, pin, pout, /* no_fork: */ 0); break; case TCOM: - { - rv = forkexec(t, pin, pout, act, wp); - } + rv = forkexec(t, pin, pout, no_fork, wp); break; case TPIPE: { int pv[2]; - if ((rv = openpipe(pv)) < 0) + rv = openpipe(pv); + if (rv < 0) break; pv[0] = remap(pv[0]); pv[1] = remap(pv[1]); - (void) execute(t->left, pin, pv, 0); - rv = execute(t->right, pv, pout, 0); + (void) execute(t->left, pin, pv, /* no_fork: */ 0); + rv = execute(t->right, pv, pout, /* no_fork: */ 0); } break; case TLIST: - (void) execute(t->left, pin, pout, 0); - rv = execute(t->right, pin, pout, 0); + (void) execute(t->left, pin, pout, /* no_fork: */ 0); + rv = execute(t->right, pin, pout, /* no_fork: */ 0); break; case TASYNC: { - int hinteractive = interactive; + smallint hinteractive = interactive; DBGPRINTF7(("EXECUTE: TASYNC clause, calling vfork()...\n")); i = vfork(); - if (i != 0) { - interactive = hinteractive; - if (i != -1) { - setval(lookup("!"), putn(i)); - if (pin != NULL) - closepipe(pin); - if (interactive) { - prs(putn(i)); - prs("\n"); - } - } else - rv = -1; - setstatus(rv); - } else { + if (i == 0) { /* child */ signal(SIGINT, SIG_IGN); signal(SIGQUIT, SIG_IGN); if (interactive) @@ -2598,28 +2531,42 @@ static int execute(struct op *t, int *pin, int *pout, int act) interactive = 0; if (pin == NULL) { close(0); - open(bb_dev_null, 0); + xopen(bb_dev_null, O_RDONLY); } - _exit(execute(t->left, pin, pout, FEXEC)); + _exit(execute(t->left, pin, pout, /* no_fork: */ 1)); } + interactive = hinteractive; + if (i != -1) { + setval(lookup("!"), putn(i)); + closepipe(pin); + if (interactive) { + prs(putn(i)); + prs("\n"); + } + } else + rv = -1; + setstatus(rv); } break; case TOR: case TAND: - rv = execute(t->left, pin, pout, 0); - if ((t1 = t->right) != NULL && (rv == 0) == (t->type == TAND)) - rv = execute(t1, pin, pout, 0); + rv = execute(t->left, pin, pout, /* no_fork: */ 0); + t1 = t->right; + if (t1 != NULL && (rv == 0) == (t->op_type == TAND)) + rv = execute(t1, pin, pout, /* no_fork: */ 0); break; case TFOR: if (wp == NULL) { wp = dolv + 1; - if ((i = dolc) < 0) + i = dolc; + if (i < 0) i = 0; } else { i = -1; - while (*wp++ != NULL); + while (*wp++ != NULL) + continue; } vp = lookup(t->str); while (setjmp(bc.brkpt)) @@ -2628,7 +2575,7 @@ static int execute(struct op *t, int *pin, int *pout, int act) brkset(&bc); for (t1 = t->left; i-- && *wp != NULL;) { setval(vp, *wp++); - rv = execute(t1, pin, pout, 0); + rv = execute(t1, pin, pout, /* no_fork: */ 0); } brklist = brklist->nextlev; break; @@ -2640,52 +2587,61 @@ static int execute(struct op *t, int *pin, int *pout, int act) goto broken; brkset(&bc); t1 = t->left; - while ((execute(t1, pin, pout, 0) == 0) == (t->type == TWHILE)) - rv = execute(t->right, pin, pout, 0); + while ((execute(t1, pin, pout, /* no_fork: */ 0) == 0) == (t->op_type == TWHILE)) + rv = execute(t->right, pin, pout, /* no_fork: */ 0); brklist = brklist->nextlev; break; case TIF: case TELIF: if (t->right != NULL) { - rv = !execute(t->left, pin, pout, 0) ? - execute(t->right->left, pin, pout, 0) : - execute(t->right->right, pin, pout, 0); + rv = !execute(t->left, pin, pout, /* no_fork: */ 0) ? + execute(t->right->left, pin, pout, /* no_fork: */ 0) : + execute(t->right->right, pin, pout, /* no_fork: */ 0); } break; case TCASE: - if ((cp = evalstr(t->str, DOSUB | DOTRIM)) == 0) + cp = evalstr(t->str, DOSUB | DOTRIM); + if (cp == NULL) cp = ""; DBGPRINTF7(("EXECUTE: TCASE, t->str is %s, cp is %s\n", ((t->str == NULL) ? "NULL" : t->str), ((cp == NULL) ? "NULL" : cp))); - if ((t1 = findcase(t->left, cp)) != NULL) { + t1 = findcase(t->left, cp); + if (t1 != NULL) { DBGPRINTF7(("EXECUTE: TCASE, calling execute(t=%p, t1=%p)...\n", t, t1)); - rv = execute(t1, pin, pout, 0); + rv = execute(t1, pin, pout, /* no_fork: */ 0); DBGPRINTF7(("EXECUTE: TCASE, back from execute(t=%p, t1=%p)...\n", t, t1)); } break; case TBRACE: /* - if (iopp = t->ioact) + iopp = t->ioact; + if (i) while (*iopp) if (iosetup(*iopp++, pin!=NULL, pout!=NULL)) { rv = -1; break; } */ - if (rv >= 0 && (t1 = t->left)) - rv = execute(t1, pin, pout, 0); + if (rv >= 0) { + t1 = t->left; + if (t1) { + rv = execute(t1, pin, pout, /* no_fork: */ 0); + } + } break; }; - broken: - t->words = wp2; + broken: +// Restoring op_words is most likely not needed now: see comment in forkexec() +// (also take a look at exec builtin (doexec) - it touches t->op_words) + t->op_words = wp2; isbreak = 0; freehere(areanum); freearea(areanum); @@ -2695,84 +2651,105 @@ static int execute(struct op *t, int *pin, int *pout, int act) fail(); } - if ((i = trapset) != 0) { + i = trapset; + if (i != 0) { trapset = 0; runtrap(i); } DBGPRINTF(("EXECUTE: returning from t=%p, rv=%d\n", t, rv)); - return (rv); + return rv; +} + +static builtin_func_ptr inbuilt(const char *s) +{ + const struct builtincmd *bp; + + for (bp = builtincmds; bp->name; bp++) + if (strcmp(bp->name, s) == 0) + return bp->builtinfunc; + return NULL; } -static int -forkexec(struct op *t, int *pin, int *pout, int act, char **wp) +static int forkexec(struct op *t, int *pin, int *pout, int no_fork, char **wp) { pid_t newpid; - int i, rv; - int (*shcom) (struct op *) = NULL; - int f; - char *cp = NULL; + int i; + builtin_func_ptr bltin = NULL; + const char *bltin_name = NULL; + const char *cp; struct ioword **iopp; int resetsig; char **owp; - int forked = 0; + int forked; int *hpin = pin; int *hpout = pout; char *hwp; - int hinteractive; - int hintr; + smallint hinteractive; + smallint hintr; + smallint hexecflg; struct brkcon *hbrklist; - int hexecflg; #if __GNUC__ /* Avoid longjmp clobbering */ (void) &pin; (void) &pout; (void) ℘ - (void) &shcom; + (void) &bltin; (void) &cp; (void) &resetsig; (void) &owp; #endif - DBGPRINTF(("FORKEXEC: t=%p, pin %p, pout %p, act %d\n", t, pin, - pout, act)); - DBGPRINTF7(("FORKEXEC: t->words is %s\n", - ((t->words == NULL) ? "NULL" : t->words[0]))); - + DBGPRINTF(("FORKEXEC: t=%p, pin %p, pout %p, no_fork %d\n", t, pin, + pout, no_fork)); + DBGPRINTF7(("FORKEXEC: t->op_words is %s\n", + ((t->op_words == NULL) ? "NULL" : t->op_words[0]))); owp = wp; resetsig = 0; - rv = -1; /* system-detected error */ - if (t->type == TCOM) { - while ((cp = *wp++) != NULL); + if (t->op_type == TCOM) { + while (*wp++ != NULL) + continue; cp = *wp; /* strip all initial assignments */ - /* not correct wrt PATH=yyy command etc */ - if (flag['x']) { + /* FIXME: not correct wrt PATH=yyy command etc */ + if (FLAG['x']) { DBGPRINTF9(("FORKEXEC: echo'ing, cp=%p, wp=%p, owp=%p\n", cp, wp, owp)); echo(cp ? wp : owp); } - if (cp == NULL && t->ioact == NULL) { - while ((cp = *owp++) != NULL && assign(cp, COPYV)); - DBGPRINTF(("FORKEXEC: returning setstatus()\n")); - return (setstatus(0)); - } else if (cp != NULL) { - shcom = inbuilt(cp); + if (cp == NULL) { + if (t->ioact == NULL) { + while ((cp = *owp++) != NULL && assign(cp, COPYV)) + continue; + DBGPRINTF(("FORKEXEC: returning setstatus(0)\n")); + return setstatus(0); + } + } else { /* cp != NULL */ + bltin_name = cp; + bltin = inbuilt(cp); } } - t->words = wp; - f = act; - - DBGPRINTF(("FORKEXEC: shcom %p, f&FEXEC 0x%x, owp %p\n", shcom, - f & FEXEC, owp)); - - if (shcom == NULL && (f & FEXEC) == 0) { - /* Save values in case the child process alters them */ + forked = 0; + // We were pointing t->op_words to temporary (expanded) arg list: + // t->op_words = wp; + // and restored it later (in execute()), but "break" + // longjmps away (at "Run builtin" below), leaving t->op_words clobbered! + // See http://bugs.busybox.net/view.php?id=846. + // Now we do not touch t->op_words, but separately pass wp as param list + // to builtins + DBGPRINTF(("FORKEXEC: bltin %p, no_fork %d, owp %p\n", bltin, + no_fork, owp)); + /* Don't fork if it is a lone builtin (not in pipe) + * OR we are told to _not_ fork */ + if ((!bltin || pin || pout) /* not lone bltin AND */ + && !no_fork /* not told to avoid fork */ + ) { + /* Save values in case child alters them after vfork */ hpin = pin; hpout = pout; hwp = *wp; @@ -2782,17 +2759,13 @@ forkexec(struct op *t, int *pin, int *pout, int act, char **wp) hexecflg = execflg; DBGPRINTF3(("FORKEXEC: calling vfork()...\n")); - newpid = vfork(); - if (newpid == -1) { - DBGPRINTF(("FORKEXEC: ERROR, unable to vfork()!\n")); - return (-1); + DBGPRINTF(("FORKEXEC: ERROR, cannot vfork()!\n")); + return -1; } - - if (newpid > 0) { /* Parent */ - + if (newpid > 0) { /* Parent */ /* Restore values */ pin = hpin; pout = hpout; @@ -2802,20 +2775,12 @@ forkexec(struct op *t, int *pin, int *pout, int act, char **wp) brklist = hbrklist; execflg = hexecflg; -/* moved up - if (i == -1) - return(rv); -*/ - - if (pin != NULL) - closepipe(pin); - + closepipe(pin); return (pout == NULL ? setstatus(waitfor(newpid, 0)) : 0); } - /* Must be the child process, pid should be 0 */ - DBGPRINTF(("FORKEXEC: child process, shcom=%p\n", shcom)); - + /* Child */ + DBGPRINTF(("FORKEXEC: child process, bltin=%p (%s)\n", bltin, bltin_name)); if (interactive) { signal(SIGINT, SIG_IGN); signal(SIGQUIT, SIG_IGN); @@ -2828,52 +2793,55 @@ forkexec(struct op *t, int *pin, int *pout, int act, char **wp) execflg = 0; } - - if (owp != NULL) + if (owp) while ((cp = *owp++) != NULL && assign(cp, COPYV)) - if (shcom == NULL) + if (!bltin) export(lookup(cp)); -#ifdef COMPIPE - if ((pin != NULL || pout != NULL) && shcom != NULL && shcom != doexec) { - err("piping to/from shell builtins not yet done"); - if (forked) - _exit(-1); - return (-1); - } -#endif - - if (pin != NULL) { - dup2(pin[0], 0); - closepipe(pin); + if (pin) { /* NB: close _first_, then move fds! */ + close(pin[1]); + xmove_fd(pin[0], 0); } - if (pout != NULL) { - dup2(pout[1], 1); - closepipe(pout); + if (pout) { + close(pout[0]); + xmove_fd(pout[1], 1); } - if ((iopp = t->ioact) != NULL) { - if (shcom != NULL && shcom != doexec) { - prs(cp); + iopp = t->ioact; + if (iopp) { + if (bltin && bltin != doexec) { + prs(bltin_name); err(": cannot redirect shell command"); if (forked) _exit(-1); - return (-1); + return -1; } - while (*iopp) + while (*iopp) { if (iosetup(*iopp++, pin != NULL, pout != NULL)) { + /* system-detected error */ if (forked) - _exit(rv); - return (rv); + _exit(-1); + return -1; } + } } - if (shcom) { - i = setstatus((*shcom) (t)); + if (bltin) { + if (forked || pin || pout) { + /* Builtin in pipe: disallowed */ + /* TODO: allow "exec"? */ + prs(bltin_name); + err(": cannot run builtin as part of pipe"); + if (forked) + _exit(-1); + return -1; + } + /* Run builtin */ + i = setstatus(bltin(t, wp)); if (forked) _exit(i); DBGPRINTF(("FORKEXEC: returning i=%d\n", i)); - return (i); + return i; } /* should use FIOCEXCL */ @@ -2884,8 +2852,8 @@ forkexec(struct op *t, int *pin, int *pout, int act, char **wp) signal(SIGQUIT, SIG_DFL); } - if (t->type == TPAREN) - _exit(execute(t->left, NOPIPE, NOPIPE, FEXEC)); + if (t->op_type == TPAREN) + _exit(execute(t->left, NOPIPE, NOPIPE, /* no_fork: */ 1)); if (wp[0] == NULL) _exit(0); @@ -2896,11 +2864,11 @@ forkexec(struct op *t, int *pin, int *pout, int act, char **wp) if (!execflg) trap[0] = NULL; - DBGPRINTF(("FORKEXEC: calling leave(), pid=%d\n", newpid)); + DBGPRINTF(("FORKEXEC: calling leave(), pid=%d\n", getpid())); leave(); /* NOTREACHED */ - _exit(1); + return 0; } /* @@ -2910,132 +2878,80 @@ forkexec(struct op *t, int *pin, int *pout, int act, char **wp) static int iosetup(struct ioword *iop, int pipein, int pipeout) { int u = -1; - char *cp = NULL, *msg; + char *cp = NULL; + const char *msg; DBGPRINTF(("IOSETUP: iop %p, pipein %i, pipeout %i\n", iop, pipein, pipeout)); - if (iop->io_unit == IODEFAULT) /* take default */ - iop->io_unit = iop->io_flag & (IOREAD | IOHERE) ? 0 : 1; + if (iop->io_fd == IODEFAULT) /* take default */ + iop->io_fd = iop->io_flag & (IOREAD | IOHERE) ? 0 : 1; - if (pipein && iop->io_unit == 0) - return (0); + if (pipein && iop->io_fd == 0) + return 0; - if (pipeout && iop->io_unit == 1) - return (0); + if (pipeout && iop->io_fd == 1) + return 0; msg = iop->io_flag & (IOREAD | IOHERE) ? "open" : "create"; if ((iop->io_flag & IOHERE) == 0) { - cp = iop->io_name; - if ((cp = evalstr(cp, DOSUB | DOTRIM)) == NULL) - return (1); + cp = iop->io_name; /* huh?? */ + cp = evalstr(cp, DOSUB | DOTRIM); + if (cp == NULL) + return 1; } if (iop->io_flag & IODUP) { if (cp[1] || (!isdigit(*cp) && *cp != '-')) { prs(cp); err(": illegal >& argument"); - return (1); + return 1; } if (*cp == '-') iop->io_flag = IOCLOSE; iop->io_flag &= ~(IOREAD | IOWRITE); } + switch (iop->io_flag) { case IOREAD: - u = open(cp, 0); + u = open(cp, O_RDONLY); break; case IOHERE: case IOHERE | IOXHERE: u = herein(iop->io_name, iop->io_flag & IOXHERE); - cp = "here file"; + cp = (char*)"here file"; break; case IOWRITE | IOCAT: - if ((u = open(cp, 1)) >= 0) { - lseek(u, (long) 0, 2); + u = open(cp, O_WRONLY); + if (u >= 0) { + lseek(u, (long) 0, SEEK_END); break; } + /* fall through to creation if >>file doesn't exist */ + case IOWRITE: u = creat(cp, 0666); break; case IODUP: - u = dup2(*cp - '0', iop->io_unit); + u = dup2(*cp - '0', iop->io_fd); break; case IOCLOSE: - close(iop->io_unit); - return (0); + close(iop->io_fd); + return 0; } + if (u < 0) { prs(cp); prs(": cannot "); warn(msg); - return (1); - } else { - if (u != iop->io_unit) { - dup2(u, iop->io_unit); - close(u); - } - } - return (0); -} - -static void echo(char **wp) -{ - int i; - - prs("+"); - for (i = 0; wp[i]; i++) { - if (i) - prs(" "); - prs(wp[i]); - } - prs("\n"); -} - -static struct op **find1case(struct op *t, char *w) -{ - struct op *t1; - struct op **tp; - char **wp, *cp; - - - if (t == NULL) { - DBGPRINTF3(("FIND1CASE: enter, t==NULL, returning.\n")); - return ((struct op **) NULL); + return 1; } - - DBGPRINTF3(("FIND1CASE: enter, t->type=%d (%s)\n", t->type, - T_CMD_NAMES[t->type])); - - if (t->type == TLIST) { - if ((tp = find1case(t->left, w)) != NULL) { - DBGPRINTF3(("FIND1CASE: found one to the left, returning tp=%p\n", tp)); - return (tp); - } - t1 = t->right; /* TPAT */ - } else - t1 = t; - - for (wp = t1->words; *wp;) - if ((cp = evalstr(*wp++, DOSUB)) && gmatch(w, cp)) { - DBGPRINTF3(("FIND1CASE: returning &t1->left= %p.\n", - &t1->left)); - return (&t1->left); - } - - DBGPRINTF(("FIND1CASE: returning NULL\n")); - return ((struct op **) NULL); -} - -static struct op *findcase(struct op *t, char *w) -{ - struct op **tp; - - return ((tp = find1case(t, w)) != NULL ? *tp : (struct op *) NULL); + xmove_fd(u, iop->io_fd); + return 0; } /* @@ -3058,7 +2974,7 @@ static int waitfor(int lastpid, int canintr) { int pid, rv; int s; - int oheedint = heedint; + smallint oheedint = heedint; heedint = 0; rv = 0; @@ -3068,8 +2984,9 @@ static int waitfor(int lastpid, int canintr) if (errno != EINTR || canintr) break; } else { - if ((rv = WAITSIG(s)) != 0) { - if (rv < NSIGNAL) { + rv = WAITSIG(s); + if (rv != 0) { + if (rv < ARRAY_SIZE(signame)) { if (signame[rv] != NULL) { if (pid != lastpid) { prn(pid); @@ -3088,9 +3005,9 @@ static int waitfor(int lastpid, int canintr) } if (WAITCORE(s)) prs(" - core dumped"); - if (rv >= NSIGNAL || signame[rv]) + if (rv >= ARRAY_SIZE(signame) || signame[rv]) prs("\n"); - rv = -1; + rv |= 0x80; } else rv = WAITVAL(s); } @@ -3106,14 +3023,14 @@ static int waitfor(int lastpid, int canintr) onintr(0); } } - return (rv); + return rv; } static int setstatus(int s) { exstat = s; setval(lookup("?"), putn(s)); - return (s); + return s; } /* @@ -3121,65 +3038,64 @@ static int setstatus(int s) * If getenv("PATH") were kept up-to-date, * execvp might be used. */ -static char *rexecve(char *c, char **v, char **envp) +static const char *rexecve(char *c, char **v, char **envp) { - int i; - char *sp, *tp; - int eacces = 0, asis = 0; - -#ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL + const char *sp; + char *tp; + int asis = 0; char *name = c; - optind = 1; - if (find_applet_by_name(name)) { - /* We have to exec here since we vforked. Running - * run_applet_by_name() won't work and bad things - * will happen. */ - execve(CONFIG_BUSYBOX_EXEC_PATH, v, envp); + if (ENABLE_FEATURE_SH_STANDALONE) { + if (find_applet_by_name(name) >= 0) { + /* We have to exec here since we vforked. Running + * run_applet_and_exit() won't work and bad things + * will happen. */ + execve(bb_busybox_exec_path, v, envp); + } } -#endif DBGPRINTF(("REXECVE: c=%p, v=%p, envp=%p\n", c, v, envp)); sp = any('/', c) ? "" : path->value; - asis = *sp == '\0'; + asis = (*sp == '\0'); while (asis || *sp != '\0') { asis = 0; - tp = e.linep; - for (; *sp != '\0'; tp++) - if ((*tp = *sp++) == ':') { - asis = *sp == '\0'; + tp = global_env.linep; + for (; *sp != '\0'; tp++) { + *tp = *sp++; + if (*tp == ':') { + asis = (*sp == '\0'); break; } - if (tp != e.linep) + } + if (tp != global_env.linep) *tp++ = '/'; - for (i = 0; (*tp++ = c[i++]) != '\0';); + strcpy(tp, c); + //for (i = 0; (*tp++ = c[i++]) != '\0';) + // continue; - DBGPRINTF3(("REXECVE: e.linep is %s\n", e.linep)); + DBGPRINTF3(("REXECVE: global_env.linep is %s\n", global_env.linep)); - execve(e.linep, v, envp); + execve(global_env.linep, v, envp); switch (errno) { case ENOEXEC: - *v = e.linep; - tp = *--v; - *v = e.linep; + *v = global_env.linep; + v--; + tp = *v; + *v = global_env.linep; execve(DEFAULT_SHELL, v, envp); *v = tp; - return ("no Shell"); + return "no shell"; case ENOMEM: - return ((char *) bb_msg_memory_exhausted); + return (char *) bb_msg_memory_exhausted; case E2BIG: - return ("argument list too long"); - - case EACCES: - eacces++; - break; + return "argument list too long"; } } - return (errno == ENOENT ? "not found" : "cannot execute"); + return errno == ENOENT ? "not found" : "cannot execute"; } /* @@ -3210,14 +3126,16 @@ static int run(struct ioarg *argp, int (*f) (struct ioarg *)) ofail = failpt; rv = -1; - if (newenv(setjmp(errpt = ev)) == 0) { - wdlist = 0; - iolist = 0; + errpt = ev; + if (newenv(setjmp(errpt)) == 0) { + wdlist = NULL; + iolist = NULL; pushio(argp, f); - e.iobase = e.iop; + global_env.iobase = global_env.iop; yynerrs = 0; - if (setjmp(failpt = rt) == 0 && yyparse() == 0) - rv = execute(outtree, NOPIPE, NOPIPE, 0); + failpt = rt; + if (setjmp(failpt) == 0 && yyparse() == 0) + rv = execute(outtree, NOPIPE, NOPIPE, /* no_fork: */ 0); quitenv(); } else { DBGPRINTF(("RUN: error from newenv()!\n")); @@ -3229,7 +3147,7 @@ static int run(struct ioarg *argp, int (*f) (struct ioarg *)) outtree = otree; freearea(areanum--); - return (rv); + return rv; } /* -------- do.c -------- */ @@ -3238,241 +3156,260 @@ static int run(struct ioarg *argp, int (*f) (struct ioarg *)) * built-in commands: doX */ -static int dohelp(struct op *t) +static int dohelp(struct op *t ATTRIBUTE_UNUSED, char **args ATTRIBUTE_UNUSED) { int col; const struct builtincmd *x; - printf("\nBuilt-in commands:\n"); - printf("-------------------\n"); + puts("\nBuilt-in commands:\n" + "-------------------"); - for (col = 0, x = builtincmds; x->builtinfunc != NULL; x++) { - if (!x->name) - continue; - col += printf("%s%s", ((col == 0) ? "\t" : " "), x->name); + col = 0; + x = builtincmds; + while (x->name) { + col += printf("%c%s", ((col == 0) ? '\t' : ' '), x->name); if (col > 60) { - printf("\n"); + bb_putchar('\n'); col = 0; } + x++; } -#ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL +#if ENABLE_FEATURE_SH_STANDALONE { - int i; - const struct BB_applet *applet; - extern const struct BB_applet applets[]; - extern const size_t NUM_APPLETS; + const char *applet = applet_names; - for (i = 0, applet = applets; i < NUM_APPLETS; applet++, i++) { - if (!applet->name) - continue; - - col += printf("%s%s", ((col == 0) ? "\t" : " "), applet->name); + while (*applet) { + col += printf("%c%s", ((col == 0) ? '\t' : ' '), applet); if (col > 60) { - printf("\n"); + bb_putchar('\n'); col = 0; } + applet += strlen(applet) + 1; } } #endif - printf("\n\n"); + puts("\n"); return EXIT_SUCCESS; } - - -static int dolabel(struct op *t) +static int dolabel(struct op *t ATTRIBUTE_UNUSED, char **args ATTRIBUTE_UNUSED) { - return (0); + return 0; } -static int dochdir(struct op *t) +static int dochdir(struct op *t ATTRIBUTE_UNUSED, char **args) { - char *cp, *er; + const char *cp, *er; - if ((cp = t->words[1]) == NULL && (cp = homedir->value) == NULL) + cp = args[1]; + if (cp == NULL) { + cp = homedir->value; + if (cp != NULL) + goto do_cd; er = ": no home directory"; - else if (chdir(cp) < 0) + } else { + do_cd: + if (chdir(cp) >= 0) + return 0; er = ": bad directory"; - else - return (0); + } prs(cp != NULL ? cp : "cd"); err(er); - return (1); + return 1; } -static int doshift(struct op *t) +static int doshift(struct op *t ATTRIBUTE_UNUSED, char **args) { int n; - n = t->words[1] ? getn(t->words[1]) : 1; + n = args[1] ? getn(args[1]) : 1; if (dolc < n) { err("nothing to shift"); - return (1); + return 1; } dolv[n] = dolv[0]; dolv += n; dolc -= n; setval(lookup("#"), putn(dolc)); - return (0); + return 0; } /* * execute login and newgrp directly */ -static int dologin(struct op *t) +static int dologin(struct op *t ATTRIBUTE_UNUSED, char **args) { - char *cp; + const char *cp; if (interactive) { signal(SIGINT, SIG_DFL); signal(SIGQUIT, SIG_DFL); } - cp = rexecve(t->words[0], t->words, makenv(0, NULL)); - prs(t->words[0]); + cp = rexecve(args[0], args, makenv(0, NULL)); + prs(args[0]); prs(": "); err(cp); - return (1); + return 1; } -static int doumask(struct op *t) +static int doumask(struct op *t ATTRIBUTE_UNUSED, char **args) { - int i, n; + int i; char *cp; - if ((cp = t->words[1]) == NULL) { + cp = args[1]; + if (cp == NULL) { i = umask(0); umask(i); - for (n = 3 * 4; (n -= 3) >= 0;) - putc('0' + ((i >> n) & 07), stderr); - putc('\n', stderr); + printf("%04o\n", i); } else { - for (n = 0; *cp >= '0' && *cp <= '9'; cp++) - n = n * 8 + (*cp - '0'); - umask(n); + i = bb_strtou(cp, NULL, 8); + if (errno) { + err("umask: bad octal number"); + return 1; + } + umask(i); } - return (0); + return 0; } -static int doexec(struct op *t) +static int doexec(struct op *t, char **args) { - int i; jmp_buf ex; xint *ofail; + char **sv_words; t->ioact = NULL; - for (i = 0; (t->words[i] = t->words[i + 1]) != NULL; i++); - if (i == 0) - return (1); + if (!args[1]) + return 1; + execflg = 1; ofail = failpt; - if (setjmp(failpt = ex) == 0) - execute(t, NOPIPE, NOPIPE, FEXEC); + failpt = ex; + + sv_words = t->op_words; + t->op_words = args + 1; +// TODO: test what will happen with "exec break" - +// will it leave t->op_words pointing to garbage? +// (see http://bugs.busybox.net/view.php?id=846) + if (setjmp(failpt) == 0) + execute(t, NOPIPE, NOPIPE, /* no_fork: */ 1); + t->op_words = sv_words; + failpt = ofail; execflg = 0; - return (1); + + return 1; } -static int dodot(struct op *t) +static int dodot(struct op *t ATTRIBUTE_UNUSED, char **args) { int i; - char *sp, *tp; + const char *sp; + char *tp; char *cp; int maltmp; - DBGPRINTF(("DODOT: enter, t=%p, tleft %p, tright %p, e.linep is %s\n", t, t->left, t->right, ((e.linep == NULL) ? "NULL" : e.linep))); + DBGPRINTF(("DODOT: enter, t=%p, tleft %p, tright %p, global_env.linep is %s\n", + t, t->left, t->right, ((global_env.linep == NULL) ? "NULL" : global_env.linep))); - if ((cp = t->words[1]) == NULL) { + cp = args[1]; + if (cp == NULL) { DBGPRINTF(("DODOT: bad args, ret 0\n")); - return (0); - } else { - DBGPRINTF(("DODOT: cp is %s\n", cp)); + return 0; } + DBGPRINTF(("DODOT: cp is %s\n", cp)); sp = any('/', cp) ? ":" : path->value; - DBGPRINTF(("DODOT: sp is %s, e.linep is %s\n", + DBGPRINTF(("DODOT: sp is %s, global_env.linep is %s\n", ((sp == NULL) ? "NULL" : sp), - ((e.linep == NULL) ? "NULL" : e.linep))); + ((global_env.linep == NULL) ? "NULL" : global_env.linep))); while (*sp) { - tp = e.linep; + tp = global_env.linep; while (*sp && (*tp = *sp++) != ':') tp++; - if (tp != e.linep) + if (tp != global_env.linep) *tp++ = '/'; - - for (i = 0; (*tp++ = cp[i++]) != '\0';); + strcpy(tp, cp); /* Original code */ - if ((i = open(e.linep, 0)) >= 0) { + i = open(global_env.linep, O_RDONLY); + if (i >= 0) { exstat = 0; maltmp = remap(i); - DBGPRINTF(("DODOT: remap=%d, exstat=%d, e.iofd %d, i %d, e.linep is %s\n", maltmp, exstat, e.iofd, i, e.linep)); + DBGPRINTF(("DODOT: remap=%d, exstat=%d, global_env.iofd %d, i %d, global_env.linep is %s\n", + maltmp, exstat, global_env.iofd, i, global_env.linep)); next(maltmp); /* Basically a PUSHIO */ DBGPRINTF(("DODOT: returning exstat=%d\n", exstat)); - return (exstat); + return exstat; } - - } /* While */ + } /* while */ prs(cp); err(": not found"); - return (-1); + return -1; } -static int dowait(struct op *t) +static int dowait(struct op *t ATTRIBUTE_UNUSED, char **args) { int i; char *cp; - if ((cp = t->words[1]) != NULL) { + cp = args[1]; + if (cp != NULL) { i = getn(cp); if (i == 0) - return (0); + return 0; } else i = -1; setstatus(waitfor(i, 1)); - return (0); + return 0; } -static int doread(struct op *t) +static int doread(struct op *t ATTRIBUTE_UNUSED, char **args) { char *cp, **wp; int nb = 0; int nl = 0; - if (t->words[1] == NULL) { + if (args[1] == NULL) { err("Usage: read name ..."); - return (1); + return 1; } - for (wp = t->words + 1; *wp; wp++) { - for (cp = e.linep; !nl && cp < elinep - 1; cp++) - if ((nb = read(0, cp, sizeof(*cp))) != sizeof(*cp) || - (nl = (*cp == '\n')) || (wp[1] && any(*cp, ifs->value))) + for (wp = args + 1; *wp; wp++) { + for (cp = global_env.linep; !nl && cp < elinep - 1; cp++) { + nb = nonblock_safe_read(0, cp, sizeof(*cp)); + if (nb != sizeof(*cp)) break; - *cp = 0; + nl = (*cp == '\n'); + if (nl || (wp[1] && any(*cp, ifs->value))) + break; + } + *cp = '\0'; if (nb <= 0) break; - setval(lookup(*wp), e.linep); + setval(lookup(*wp), global_env.linep); } - return (nb <= 0); + return nb <= 0; } -static int doeval(struct op *t) +static int doeval(struct op *t ATTRIBUTE_UNUSED, char **args) { - return (RUN(awordlist, t->words + 1, wdchar)); + return RUN(awordlist, args + 1, wdchar); } -static int dotrap(struct op *t) +static int dotrap(struct op *t ATTRIBUTE_UNUSED, char **args) { int n, i; int resetsig; - if (t->words[1] == NULL) { + if (args[1] == NULL) { for (i = 0; i <= _NSIG; i++) if (trap[i]) { prn(i); @@ -3480,41 +3417,42 @@ static int dotrap(struct op *t) prs(trap[i]); prs("\n"); } - return (0); + return 0; } - resetsig = isdigit(*t->words[1]); - for (i = resetsig ? 1 : 2; t->words[i] != NULL; ++i) { - n = getsig(t->words[i]); + resetsig = isdigit(args[1][0]); + for (i = resetsig ? 1 : 2; args[i] != NULL; ++i) { + n = getsig(args[i]); freecell(trap[n]); trap[n] = 0; if (!resetsig) { - if (*t->words[1] != '\0') { - trap[n] = strsave(t->words[1], 0); + if (args[1][0] != '\0') { + trap[n] = strsave(args[1], 0); setsig(n, sig); } else setsig(n, SIG_IGN); } else { - if (interactive) + if (interactive) { if (n == SIGINT) setsig(n, onintr); else setsig(n, n == SIGQUIT ? SIG_IGN : SIG_DFL); - else + } else setsig(n, SIG_DFL); } } - return (0); + return 0; } static int getsig(char *s) { int n; - if ((n = getn(s)) < 0 || n > _NSIG) { + n = getn(s); + if (n < 0 || n > _NSIG) { err("trap: bad signal number"); n = 0; } - return (n); + return n; } static void setsig(int n, sighandler_t f) @@ -3544,17 +3482,17 @@ static int getn(char *as) prs(as); err(": bad number"); } - return (n * m); + return n * m; } -static int dobreak(struct op *t) +static int dobreak(struct op *t ATTRIBUTE_UNUSED, char **args) { - return (brkcontin(t->words[1], 1)); + return brkcontin(args[1], 1); } -static int docontinue(struct op *t) +static int docontinue(struct op *t ATTRIBUTE_UNUSED, char **args) { - return (brkcontin(t->words[1], 0)); + return brkcontin(args[1], 0); } static int brkcontin(char *cp, int val) @@ -3566,44 +3504,46 @@ static int brkcontin(char *cp, int val) if (nl <= 0) nl = 999; do { - if ((bc = brklist) == NULL) + bc = brklist; + if (bc == NULL) break; brklist = bc->nextlev; } while (--nl); if (nl) { err("bad break/continue level"); - return (1); + return 1; } - isbreak = val; + isbreak = (val != 0); longjmp(bc->brkpt, 1); /* NOTREACHED */ } -static int doexit(struct op *t) +static int doexit(struct op *t ATTRIBUTE_UNUSED, char **args) { char *cp; execflg = 0; - if ((cp = t->words[1]) != NULL) + cp = args[1]; + if (cp != NULL) setstatus(getn(cp)); DBGPRINTF(("DOEXIT: calling leave(), t=%p\n", t)); leave(); /* NOTREACHED */ - return (0); + return 0; } -static int doexport(struct op *t) +static int doexport(struct op *t ATTRIBUTE_UNUSED, char **args) { - rdexp(t->words + 1, export, EXPORT); - return (0); + rdexp(args + 1, export, EXPORT); + return 0; } -static int doreadonly(struct op *t) +static int doreadonly(struct op *t ATTRIBUTE_UNUSED, char **args) { - rdexp(t->words + 1, ronly, RONLY); - return (0); + rdexp(args + 1, ronly, RONLY); + return 0; } static void rdexp(char **wp, void (*f) (struct var *), int key) @@ -3617,7 +3557,8 @@ static void rdexp(char **wp, void (*f) (struct var *), int key) char *cp; assign(*wp, COPYV); - for (cp = *wp; *cp != '='; cp++); + for (cp = *wp; *cp != '='; cp++) + continue; *cp = '\0'; } if (checkname(*wp)) @@ -3635,47 +3576,49 @@ static void badid(char *s) err(": bad identifier"); } -static int doset(struct op *t) +static int doset(struct op *t ATTRIBUTE_UNUSED, char **args) { struct var *vp; char *cp; int n; - if ((cp = t->words[1]) == NULL) { + cp = args[1]; + if (cp == NULL) { for (vp = vlist; vp; vp = vp->next) varput(vp->name, 1); - return (0); + return 0; } if (*cp == '-') { - /* bad: t->words++; */ - for (n = 0; (t->words[n] = t->words[n + 1]) != NULL; n++); + args++; if (*++cp == 0) - flag['x'] = flag['v'] = 0; - else - for (; *cp; cp++) + FLAG['x'] = FLAG['v'] = 0; + else { + for (; *cp; cp++) { switch (*cp) { case 'e': if (!interactive) - flag['e']++; + FLAG['e']++; break; default: if (*cp >= 'a' && *cp <= 'z') - flag[(int) *cp]++; + FLAG[(int) *cp]++; break; } + } + } setdash(); } - if (t->words[1]) { - t->words[0] = dolv[0]; - for (n = 1; t->words[n]; n++) - setarea((char *) t->words[n], 0); + if (args[1]) { + args[0] = dolv[0]; + for (n = 1; args[n]; n++) + setarea((char *) args[n], 0); dolc = n - 1; - dolv = t->words; + dolv = args; setval(lookup("#"), putn(dolc)); setarea((char *) (dolv - 1), 0); } - return (0); + return 0; } static void varput(char *s, int out) @@ -3691,35 +3634,44 @@ static void varput(char *s, int out) * Copyright (c) 1999 Herbert Xu * This file contains code for the times builtin. */ -static int dotimes(struct op *t) +static void times_fmt(char *buf, clock_t val, unsigned clk_tck) { - struct tms buf; - long int clk_tck = sysconf(_SC_CLK_TCK); - - times(&buf); - printf("%dm%fs %dm%fs\n%dm%fs %dm%fs\n", - (int) (buf.tms_utime / clk_tck / 60), - ((double) buf.tms_utime) / clk_tck, - (int) (buf.tms_stime / clk_tck / 60), - ((double) buf.tms_stime) / clk_tck, - (int) (buf.tms_cutime / clk_tck / 60), - ((double) buf.tms_cutime) / clk_tck, - (int) (buf.tms_cstime / clk_tck / 60), - ((double) buf.tms_cstime) / clk_tck); - return 0; + unsigned min, sec; + if (sizeof(val) > sizeof(int)) + sec = ((unsigned long)val) / clk_tck; + else + sec = ((unsigned)val) / clk_tck; + min = sec / 60; +#if ENABLE_DESKTOP + sprintf(buf, "%um%u.%03us", min, (sec - min * 60), + /* msec: */ ((unsigned)(val - (clock_t)sec * clk_tck)) * 1000 / clk_tck + ); +#else + sprintf(buf, "%um%us", min, (sec - min * 60)); +#endif } +static int dotimes(struct op *t ATTRIBUTE_UNUSED, char **args ATTRIBUTE_UNUSED) +{ + struct tms buf; + unsigned clk_tck = sysconf(_SC_CLK_TCK); + /* How much do we need for "NmN.NNNs" ? */ + enum { TIMEBUF_SIZE = sizeof(int)*3 + sizeof(int)*3 + 6 }; + char u[TIMEBUF_SIZE], s[TIMEBUF_SIZE]; + char cu[TIMEBUF_SIZE], cs[TIMEBUF_SIZE]; -static int (*inbuilt(char *s)) (struct op *) { - const struct builtincmd *bp; + times(&buf); - for (bp = builtincmds; bp->name != NULL; bp++) - if (strcmp(bp->name, s) == 0) - return (bp->builtinfunc); + times_fmt(u, buf.tms_utime, clk_tck); + times_fmt(s, buf.tms_stime, clk_tck); + times_fmt(cu, buf.tms_cutime, clk_tck); + times_fmt(cs, buf.tms_cstime, clk_tck); - return (NULL); + printf("%s %s\n%s %s\n", u, s, cu, cs); + return 0; } + /* -------- eval.c -------- */ /* @@ -3748,17 +3700,18 @@ static char **eval(char **ap, int f) wp = NULL; wb = NULL; wf = NULL; - if (newenv(setjmp(errpt = ev)) == 0) { + errpt = ev; + if (newenv(setjmp(errpt)) == 0) { while (*ap && isassign(*ap)) expand(*ap++, &wb, f & ~DOGLOB); - if (flag['k']) { + if (FLAG['k']) { for (wf = ap; *wf; wf++) { if (isassign(*wf)) expand(*wf, &wb, f & ~DOGLOB); } } - for (wb = addword((char *) 0, wb); *ap; ap++) { - if (!flag['k'] || !isassign(*ap)) + for (wb = addword((char *) NULL, wb); *ap; ap++) { + if (!FLAG['k'] || !isassign(*ap)) expand(*ap, &wb, f & ~DOKEY); } wb = addword((char *) 0, wb); @@ -3767,9 +3720,10 @@ static char **eval(char **ap, int f) } else gflg = 1; - return (gflg ? (char **) NULL : wp); + return gflg ? (char **) NULL : wp; } + /* * Make the exported environment from the exported * names in the dictionary. Keyword assignments @@ -3785,29 +3739,13 @@ static char **makenv(int all, struct wdblock *wb) if (all || vp->status & EXPORT) wb = addword(vp->name, wb); wb = addword((char *) 0, wb); - return (getwords(wb)); + return getwords(wb); } -static char *evalstr(char *cp, int f) -{ - struct wdblock *wb; - - DBGPRINTF6(("EVALSTR: enter, cp=%p, f=%d\n", cp, f)); - - wb = NULL; - if (expand(cp, &wb, f)) { - if (wb == NULL || wb->w_nword == 0 - || (cp = wb->w_words[0]) == NULL) - cp = ""; - DELETE(wb); - } else - cp = NULL; - return (cp); -} - -static int expand(char *cp, struct wdblock **wbp, int f) +static int expand(const char *cp, struct wdblock **wbp, int f) { jmp_buf ev; + char *xp; #if __GNUC__ /* Avoid longjmp clobbering */ @@ -3819,35 +3757,60 @@ static int expand(char *cp, struct wdblock **wbp, int f) gflg = 0; if (cp == NULL) - return (0); + return 0; - if (!anys("$`'\"", cp) && - !anys(ifs->value, cp) && ((f & DOGLOB) == 0 || !anys("[*?", cp))) { - cp = strsave(cp, areanum); + if (!anys("$`'\"", cp) && !anys(ifs->value, cp) + && ((f & DOGLOB) == 0 || !anys("[*?", cp)) + ) { + xp = strsave(cp, areanum); if (f & DOTRIM) - unquote(cp); - *wbp = addword(cp, *wbp); - return (1); + unquote(xp); + *wbp = addword(xp, *wbp); + return 1; } - if (newenv(setjmp(errpt = ev)) == 0) { + errpt = ev; + if (newenv(setjmp(errpt)) == 0) { PUSHIO(aword, cp, strchar); - e.iobase = e.iop; - while ((cp = blank(f)) && gflg == 0) { - e.linep = cp; - cp = strsave(cp, areanum); + global_env.iobase = global_env.iop; + while ((xp = blank(f)) && gflg == 0) { + global_env.linep = xp; + xp = strsave(xp, areanum); if ((f & DOGLOB) == 0) { if (f & DOTRIM) - unquote(cp); - *wbp = addword(cp, *wbp); + unquote(xp); + *wbp = addword(xp, *wbp); } else - *wbp = glob(cp, *wbp); + *wbp = glob(xp, *wbp); } quitenv(); } else gflg = 1; - return (gflg == 0); + return gflg == 0; +} + +static char *evalstr(char *cp, int f) +{ + struct wdblock *wb; + + DBGPRINTF6(("EVALSTR: enter, cp=%p, f=%d\n", cp, f)); + + wb = NULL; + if (expand(cp, &wb, f)) { + if (wb == NULL || wb->w_nword == 0 + || (cp = wb->w_words[0]) == NULL + ) { +// TODO: I suspect that +// char *evalstr(char *cp, int f) is actually +// const char *evalstr(const char *cp, int f)! + cp = (char*)""; + } + DELETE(wb); + } else + cp = NULL; + return cp; } + /* * Blank interpretation and quoting */ @@ -3859,17 +3822,18 @@ static char *blank(int f) DBGPRINTF3(("BLANK: enter, f=%d\n", f)); - sp = e.linep; + sp = global_env.linep; scanequals = f & DOKEY; foundequals = 0; - loop: - switch (c = subgetc('"', foundequals)) { + loop: + c = subgetc('"', foundequals); + switch (c) { case 0: - if (sp == e.linep) - return (0); - *e.linep++ = 0; - return (sp); + if (sp == global_env.linep) + return 0; + *global_env.linep++ = 0; + return sp; default: if (f & DOBLANK && any(c, ifs->value)) @@ -3886,7 +3850,7 @@ static char *blank(int f) break; if (c == '\'' || !any(c, "$`\"")) c |= QUOTE; - *e.linep++ = c; + *global_env.linep++ = c; } c = 0; } @@ -3911,10 +3875,10 @@ static char *blank(int f) } else if (!isalnum(c) && c != '_') scanequals = 0; } - *e.linep++ = c; + *global_env.linep++ = c; } - *e.linep++ = 0; - return (sp); + *global_env.linep++ = 0; + return sp; } /* @@ -3926,21 +3890,24 @@ static int subgetc(char ec, int quoted) DBGPRINTF3(("SUBGETC: enter, quoted=%d\n", quoted)); - again: + again: c = my_getc(ec); if (!INSUB() && ec != '\'') { if (c == '`') { if (grave(quoted) == 0) - return (0); - e.iop->task = XGRAVE; + return 0; + global_env.iop->task = XGRAVE; goto again; } - if (c == '$' && (c = dollar(quoted)) == 0) { - e.iop->task = XDOLL; - goto again; + if (c == '$') { + c = dollar(quoted); + if (c == 0) { + global_env.iop->task = XDOLL; + goto again; + } } } - return (c); + return c; } /* @@ -3957,38 +3924,38 @@ static int dollar(int quoted) DBGPRINTF3(("DOLLAR: enter, quoted=%d\n", quoted)); c = readc(); - s = e.linep; + s = global_env.linep; if (c != '{') { - *e.linep++ = c; + *global_env.linep++ = c; if (isalpha(c) || c == '_') { while ((c = readc()) != 0 && (isalnum(c) || c == '_')) - if (e.linep < elinep) - *e.linep++ = c; + if (global_env.linep < elinep) + *global_env.linep++ = c; unget(c); } c = 0; } else { - oiop = e.iop; - otask = e.iop->task; + oiop = global_env.iop; + otask = global_env.iop->task; - e.iop->task = XOTHER; + global_env.iop->task = XOTHER; while ((c = subgetc('"', 0)) != 0 && c != '}' && c != '\n') - if (e.linep < elinep) - *e.linep++ = c; - if (oiop == e.iop) - e.iop->task = otask; + if (global_env.linep < elinep) + *global_env.linep++ = c; + if (oiop == global_env.iop) + global_env.iop->task = otask; if (c != '}') { err("unclosed ${"); - gflg++; - return (c); + gflg = 1; + return c; } } - if (e.linep >= elinep) { + if (global_env.linep >= elinep) { err("string in ${} too long"); - gflg++; - e.linep -= 10; + gflg = 1; + global_env.linep -= 10; } - *e.linep = 0; + *global_env.linep = 0; if (*s) for (cp = s + 1; *cp; cp++) if (any(*cp, "=-+?")) { @@ -4000,21 +3967,22 @@ static int dollar(int quoted) if (dolc > 1) { /* currently this does not distinguish $* and $@ */ /* should check dollar */ - e.linep = s; + global_env.linep = s; PUSHIO(awordlist, dolv + 1, dolchar); - return (0); + return 0; } else { /* trap the nasty ${=} */ s[0] = '1'; - s[1] = 0; + s[1] = '\0'; } } vp = lookup(s); - if ((dolp = vp->value) == null) { + dolp = vp->value; + if (dolp == null) { switch (c) { case '=': if (isdigit(*s)) { err("cannot use ${...=...} with $n"); - gflg++; + gflg = 1; break; } setval(vp, cp); @@ -4031,19 +3999,19 @@ static int dollar(int quoted) err(s); } else err(cp); - gflg++; + gflg = 1; break; } } else if (c == '+') dolp = strsave(cp, areanum); - if (flag['u'] && dolp == null) { + if (FLAG['u'] && dolp == null) { prs("unset variable: "); err(s); - gflg++; + gflg = 1; } - e.linep = s; + global_env.linep = s; PUSHIO(aword, dolp, quoted ? qstrchar : strchar); - return (0); + return 0; } /* @@ -4052,12 +4020,13 @@ static int dollar(int quoted) static int grave(int quoted) { - char *cp; + /* moved to G: static char child_cmd[LINELIM]; */ + + const char *cp; int i; int j; int pf[2]; - static char child_cmd[LINELIM]; - char *src; + const char *src; char *dest; int count; int ignore; @@ -4070,14 +4039,15 @@ static int grave(int quoted) (void) &cp; #endif - for (cp = e.iop->argp->aword; *cp != '`'; cp++) + for (cp = global_env.iop->argp->aword; *cp != '`'; cp++) { if (*cp == 0) { err("no closing `"); - return (0); + return 0; } + } /* string copy with dollar expansion */ - src = e.iop->argp->aword; + src = global_env.iop->argp->aword; dest = child_cmd; count = 0; ignore = 0; @@ -4089,8 +4059,12 @@ static int grave(int quoted) ignore_once = 1; if (*src == '$' && !ignore && !ignore_once) { struct var *vp; + /* moved to G to reduce stack usage char var_name[LINELIM]; char alt_value[LINELIM]; + */ +#define var_name (G.grave__var_name) +#define alt_value (G.grave__alt_value) int var_index = 0; int alt_index = 0; char operator = 0; @@ -4120,7 +4094,7 @@ static int grave(int quoted) break; default: err("unclosed ${\n"); - return (0); + return 0; } if (operator) { src++; @@ -4130,7 +4104,7 @@ static int grave(int quoted) alt_value[alt_index] = 0; if (*src != '}') { err("unclosed ${\n"); - return (0); + return 0; } } src++; @@ -4165,7 +4139,7 @@ static int grave(int quoted) alt_value : vp->value; else if (operator == '?') { err(alt_value); - return (0); + return 0; } else if (alt_index && (operator != '+')) { value = alt_value; if (operator == '=') @@ -4178,6 +4152,8 @@ static int grave(int quoted) count++; } } +#undef var_name +#undef alt_value } else { *dest++ = *src++; count++; @@ -4187,25 +4163,25 @@ static int grave(int quoted) *dest = '\0'; if (openpipe(pf) < 0) - return (0); + return 0; - while ((i = vfork()) == -1 && errno == EAGAIN); + while ((i = vfork()) == -1 && errno == EAGAIN) + continue; DBGPRINTF3(("GRAVE: i is %p\n", io)); if (i < 0) { closepipe(pf); err((char *) bb_msg_memory_exhausted); - return (0); + return 0; } if (i != 0) { - waitpid(i, NULL, 0); - e.iop->argp->aword = ++cp; + waitpid(i, NULL, 0); // safe_waitpid? + global_env.iop->argp->aword = ++cp; close(pf[1]); PUSHIO(afile, remap(pf[0]), - (int (*)(struct ioarg *)) ((quoted) ? qgravechar : - gravechar)); - return (1); + (int (*)(struct ioarg *)) ((quoted) ? qgravechar : gravechar)); + return 1; } /* allow trapped signals */ /* XXX - Maybe this signal stuff should go as well? */ @@ -4213,13 +4189,19 @@ static int grave(int quoted) if (ourtrap[j] && signal(j, SIG_IGN) != SIG_IGN) signal(j, SIG_DFL); - dup2(pf[1], 1); - closepipe(pf); + /* Testcase where below checks are needed: + * close stdout & run this script: + * files=`ls` + * echo "$files" >zz + */ + xmove_fd(pf[1], 1); + if (pf[0] != 1) + close(pf[0]); argument_list[0] = (char *) DEFAULT_SHELL; - argument_list[1] = "-c"; + argument_list[1] = (char *) "-c"; argument_list[2] = child_cmd; - argument_list[3] = 0; + argument_list[3] = NULL; cp = rexecve(argument_list[0], argument_list, makenv(1, wb)); prs(argument_list[0]); @@ -4233,10 +4215,11 @@ static char *unquote(char *as) { char *s; - if ((s = as) != NULL) + s = as; + if (s != NULL) while (*s) *s++ &= ~QUOTE; - return (as); + return as; } /* -------- glob.c -------- */ @@ -4250,7 +4233,7 @@ static char *unquote(char *as) #define NDENT ((BLKSIZ+sizeof(struct dirent)-1)/sizeof(struct dirent)) static struct wdblock *cl, *nl; -static char spcl[] = "[?*"; +static const char spcl[] ALIGN1= "[?*"; static struct wdblock *glob(char *cp, struct wdblock *wb) { @@ -4258,7 +4241,7 @@ static struct wdblock *glob(char *cp, struct wdblock *wb) char *pp; if (cp == 0) - return (wb); + return wb; i = 0; for (pp = cp; *pp; pp++) if (any(*pp, spcl)) @@ -4266,8 +4249,7 @@ static struct wdblock *glob(char *cp, struct wdblock *wb) else if (!any(*pp & ~QUOTE, spcl)) *pp &= ~QUOTE; if (i != 0) { - for (cl = addword(scopy(cp), (struct wdblock *) 0); anyspcl(cl); - cl = nl) { + for (cl = addword(scopy(cp), NULL); anyspcl(cl); cl = nl) { nl = newword(cl->w_nword * 2); for (i = 0; i < cl->w_nword; i++) { /* for each argument */ for (pp = cl->w_words[i]; *pp; pp++) @@ -4282,18 +4264,18 @@ static struct wdblock *glob(char *cp, struct wdblock *wb) DELETE(cl->w_words[i]); DELETE(cl); } - for (i = 0; i < cl->w_nword; i++) - unquote(cl->w_words[i]); - glob0((char *) cl->w_words, cl->w_nword, sizeof(char *), xstrcmp); if (cl->w_nword) { + for (i = 0; i < cl->w_nword; i++) + unquote(cl->w_words[i]); + qsort_string_vector(cl->w_words, cl->w_nword); for (i = 0; i < cl->w_nword; i++) wb = addword(cl->w_words[i], wb); DELETE(cl); - return (wb); + return wb; } } wb = addword(unquote(cp), wb); - return (wb); + return wb; } static void globname(char *we, char *pp) @@ -4309,11 +4291,13 @@ static void globname(char *we, char *pp) for (np = we; np != pp; pp--) if (pp[-1] == '/') break; - for (dp = cp = space((int) (pp - np) + 3); np < pp;) + dp = cp = get_space((int) (pp - np) + 3); + while (np < pp) *cp++ = *np++; *cp++ = '.'; *cp = '\0'; - for (gp = cp = space(strlen(pp) + 1); *np && *np != '/';) + gp = cp = get_space(strlen(pp) + 1); + while (*np && *np != '/') *cp++ = *np++; *cp = '\0'; dirp = opendir(dp); @@ -4327,7 +4311,7 @@ static void globname(char *we, char *pp) /* XXX Hmmm... What this could be? (abial) */ /* if (ent[j].d_ino == 0) - continue; + continue; */ strncpy(dname, de->d_name, NAME_MAX); if (dname[0] == '.') @@ -4362,14 +4346,15 @@ static char *generate(char *start1, char *end1, char *middle, char *end) char *p; char *op, *xp; - p = op = - space((int) (end1 - start1) + strlen(middle) + strlen(end) + 2); - for (xp = start1; xp != end1;) + p = op = get_space((int)(end1 - start1) + strlen(middle) + strlen(end) + 2); + xp = start1; + while (xp != end1) + *op++ = *xp++; + xp = middle; + while (*xp != '\0') *op++ = *xp++; - for (xp = middle; (*op++ = *xp++) != '\0';); - op--; - for (xp = end; (*op++ = *xp++) != '\0';); - return (p); + strcpy(op, end); + return p; } static int anyspcl(struct wdblock *wb) @@ -4380,14 +4365,10 @@ static int anyspcl(struct wdblock *wb) wd = wb->w_words; for (i = 0; i < wb->w_nword; i++) if (anys(spcl, *wd++)) - return (1); - return (0); + return 1; + return 0; } -static int xstrcmp(char *p1, char *p2) -{ - return (strcmp(*(char **) p1, *(char **) p2)); -} /* -------- word.c -------- */ @@ -4395,10 +4376,10 @@ static struct wdblock *newword(int nw) { struct wdblock *wb; - wb = (struct wdblock *) space(sizeof(*wb) + nw * sizeof(char *)); + wb = get_space(sizeof(*wb) + nw * sizeof(char *)); wb->w_bsize = nw; wb->w_nword = 0; - return (wb); + return wb; } static struct wdblock *addword(char *wd, struct wdblock *wb) @@ -4408,7 +4389,8 @@ static struct wdblock *addword(char *wd, struct wdblock *wb) if (wb == NULL) wb = newword(NSTART); - if ((nw = wb->w_nword) >= wb->w_bsize) { + nw = wb->w_nword; + if (nw >= wb->w_bsize) { wb2 = newword(nw * 2); memcpy((char *) wb2->w_words, (char *) wb->w_words, nw * sizeof(char *)); @@ -4417,139 +4399,28 @@ static struct wdblock *addword(char *wd, struct wdblock *wb) wb = wb2; } wb->w_words[wb->w_nword++] = wd; - return (wb); + return wb; } -static -char **getwords(struct wdblock *wb) +static char **getwords(struct wdblock *wb) { char **wd; - int nb; - - if (wb == NULL) - return ((char **) NULL); - if (wb->w_nword == 0) { - DELETE(wb); - return ((char **) NULL); - } - wd = (char **) space(nb = sizeof(*wd) * wb->w_nword); - memcpy((char *) wd, (char *) wb->w_words, nb); - DELETE(wb); /* perhaps should done by caller */ - return (wd); -} - -static int (*func) (char *, char *); -static int globv; - -static void glob0(char *a0, unsigned a1, int a2, int (*a3) (char *, char *)) -{ - func = a3; - globv = a2; - glob1(a0, a0 + a1 * a2); -} - -static void glob1(char *base, char *lim) -{ - char *i, *j; - int v2; - char *lptr, *hptr; - int c; - unsigned n; - - - v2 = globv; - - top: - if ((n = (int) (lim - base)) <= v2) - return; - n = v2 * (n / (2 * v2)); - hptr = lptr = base + n; - i = base; - j = lim - v2; - for (;;) { - if (i < lptr) { - if ((c = (*func) (i, lptr)) == 0) { - glob2(i, lptr -= v2); - continue; - } - if (c < 0) { - i += v2; - continue; - } - } - - begin: - if (j > hptr) { - if ((c = (*func) (hptr, j)) == 0) { - glob2(hptr += v2, j); - goto begin; - } - if (c > 0) { - if (i == lptr) { - glob3(i, hptr += v2, j); - i = lptr += v2; - goto begin; - } - glob2(i, j); - j -= v2; - i += v2; - continue; - } - j -= v2; - goto begin; - } - - - if (i == lptr) { - if (lptr - base >= lim - hptr) { - glob1(hptr + v2, lim); - lim = lptr; - } else { - glob1(base, lptr); - base = hptr + v2; - } - goto top; - } - - - glob3(j, lptr -= v2, i); - j = hptr -= v2; - } -} - -static void glob2(char *i, char *j) -{ - char *index1, *index2, c; - int m; - - m = globv; - index1 = i; - index2 = j; - do { - c = *index1; - *index1++ = *index2; - *index2++ = c; - } while (--m); -} - -static void glob3(char *i, char *j, char *k) -{ - char *index1, *index2, *index3; - int c; - int m; + int nb; - m = globv; - index1 = i; - index2 = j; - index3 = k; - do { - c = *index1; - *index1++ = *index3; - *index3++ = *index2; - *index2++ = c; - } while (--m); + if (wb == NULL) + return NULL; + if (wb->w_nword == 0) { + DELETE(wb); + return NULL; + } + nb = sizeof(*wd) * wb->w_nword; + wd = get_space(nb); + memcpy(wd, wb->w_words, nb); + DELETE(wb); /* perhaps should done by caller */ + return wd; } + /* -------- io.c -------- */ /* @@ -4560,170 +4431,170 @@ static int my_getc(int ec) { int c; - if (e.linep > elinep) { - while ((c = readc()) != '\n' && c); + if (global_env.linep > elinep) { + while ((c = readc()) != '\n' && c) + continue; err("input line too long"); - gflg++; - return (c); + gflg = 1; + return c; } c = readc(); - if ((ec != '\'') && (ec != '`') && (e.iop->task != XGRAVE)) { + if ((ec != '\'') && (ec != '`') && (global_env.iop->task != XGRAVE)) { if (c == '\\') { c = readc(); if (c == '\n' && ec != '\"') - return (my_getc(ec)); + return my_getc(ec); c |= QUOTE; } } - return (c); + return c; } static void unget(int c) { - if (e.iop >= e.iobase) - e.iop->peekc = c; + if (global_env.iop >= global_env.iobase) + global_env.iop->peekc = c; } static int eofc(void) { - return e.iop < e.iobase || (e.iop->peekc == 0 && e.iop->prev == 0); + return global_env.iop < global_env.iobase || (global_env.iop->peekc == 0 && global_env.iop->prev == 0); } static int readc(void) { int c; - RCPRINTF(("READC: e.iop %p, e.iobase %p\n", e.iop, e.iobase)); + RCPRINTF(("READC: global_env.iop %p, global_env.iobase %p\n", global_env.iop, global_env.iobase)); - for (; e.iop >= e.iobase; e.iop--) { - RCPRINTF(("READC: e.iop %p, peekc 0x%x\n", e.iop, e.iop->peekc)); - if ((c = e.iop->peekc) != '\0') { - e.iop->peekc = 0; - return (c); - } else { - if (e.iop->prev != 0) { - if ((c = (*e.iop->iofn) (e.iop->argp, e.iop)) != '\0') { - if (c == -1) { - e.iop++; - continue; - } - if (e.iop == iostack) - ioecho(c); - return (e.iop->prev = c); - } else if (e.iop->task == XIO && e.iop->prev != '\n') { - e.iop->prev = 0; - if (e.iop == iostack) - ioecho('\n'); - return '\n'; + for (; global_env.iop >= global_env.iobase; global_env.iop--) { + RCPRINTF(("READC: global_env.iop %p, peekc 0x%x\n", global_env.iop, global_env.iop->peekc)); + c = global_env.iop->peekc; + if (c != '\0') { + global_env.iop->peekc = 0; + return c; + } + if (global_env.iop->prev != 0) { + c = (*global_env.iop->iofn)(global_env.iop->argp, global_env.iop); + if (c != '\0') { + if (c == -1) { + global_env.iop++; + continue; } + if (global_env.iop == iostack) + ioecho(c); + global_env.iop->prev = c; + return c; } - if (e.iop->task == XIO) { - if (multiline) { - return e.iop->prev = 0; - } - if (interactive && e.iop == iostack + 1) { -#ifdef CONFIG_FEATURE_COMMAND_EDITING - current_prompt = prompt->value; + if (global_env.iop->task == XIO && global_env.iop->prev != '\n') { + global_env.iop->prev = 0; + if (global_env.iop == iostack) + ioecho('\n'); + return '\n'; + } + } + if (global_env.iop->task == XIO) { + if (multiline) { + global_env.iop->prev = 0; + return 0; + } + if (interactive && global_env.iop == iostack + 1) { +#if ENABLE_FEATURE_EDITING + current_prompt = prompt->value; #else - prs(prompt->value); + prs(prompt->value); #endif - } } } - } /* FOR */ - if (e.iop >= iostack) { - RCPRINTF(("READC: return 0, e.iop %p\n", e.iop)); - return (0); + if (global_env.iop >= iostack) { + RCPRINTF(("READC: return 0, global_env.iop %p\n", global_env.iop)); + return 0; } DBGPRINTF(("READC: leave()...\n")); leave(); - /* NOTREACHED */ - return (0); + return 0; } static void ioecho(char c) { - if (flag['v']) + if (FLAG['v']) write(2, &c, sizeof c); } - static void pushio(struct ioarg *argp, int (*fn) (struct ioarg *)) { - DBGPRINTF(("PUSHIO: argp %p, argp->afid 0x%x, e.iop %p\n", argp, - argp->afid, e.iop)); + DBGPRINTF(("PUSHIO: argp %p, argp->afid 0x%x, global_env.iop %p\n", argp, + argp->afid, global_env.iop)); /* Set env ptr for io source to next array spot and check for array overflow */ - if (++e.iop >= &iostack[NPUSH]) { - e.iop--; + if (++global_env.iop >= &iostack[NPUSH]) { + global_env.iop--; err("Shell input nested too deeply"); - gflg++; + gflg = 1; return; } /* We did not overflow the NPUSH array spots so setup data structs */ - e.iop->iofn = (int (*)(struct ioarg *, struct io *)) fn; /* Store data source func ptr */ + global_env.iop->iofn = (int (*)(struct ioarg *, struct io *)) fn; /* Store data source func ptr */ if (argp->afid != AFID_NOBUF) - e.iop->argp = argp; + global_env.iop->argp = argp; else { - e.iop->argp = ioargstack + (e.iop - iostack); /* MAL - index into stack */ - *e.iop->argp = *argp; /* copy data from temp area into stack spot */ + global_env.iop->argp = ioargstack + (global_env.iop - iostack); /* MAL - index into stack */ + *global_env.iop->argp = *argp; /* copy data from temp area into stack spot */ /* MAL - mainbuf is for 1st data source (command line?) and all nested use a single shared buffer? */ - if (e.iop == &iostack[0]) - e.iop->argp->afbuf = &mainbuf; + if (global_env.iop == &iostack[0]) + global_env.iop->argp->afbuf = &mainbuf; else - e.iop->argp->afbuf = &sharedbuf; + global_env.iop->argp->afbuf = &sharedbuf; /* MAL - if not a termimal AND (commandline OR readable file) then give it a buffer id? */ /* This line appears to be active when running scripts from command line */ - if ((isatty(e.iop->argp->afile) == 0) - && (e.iop == &iostack[0] - || lseek(e.iop->argp->afile, 0L, 1) != -1)) { + if ((isatty(global_env.iop->argp->afile) == 0) + && (global_env.iop == &iostack[0] + || lseek(global_env.iop->argp->afile, 0L, SEEK_CUR) != -1)) { if (++bufid == AFID_NOBUF) /* counter rollover check, AFID_NOBUF = 11111111 */ bufid = AFID_ID; /* AFID_ID = 0 */ - e.iop->argp->afid = bufid; /* assign buffer id */ + global_env.iop->argp->afid = bufid; /* assign buffer id */ } - DBGPRINTF(("PUSHIO: iostack %p, e.iop %p, afbuf %p\n", - iostack, e.iop, e.iop->argp->afbuf)); - DBGPRINTF(("PUSHIO: mbuf %p, sbuf %p, bid %d, e.iop %p\n", - &mainbuf, &sharedbuf, bufid, e.iop)); + DBGPRINTF(("PUSHIO: iostack %p, global_env.iop %p, afbuf %p\n", + iostack, global_env.iop, global_env.iop->argp->afbuf)); + DBGPRINTF(("PUSHIO: mbuf %p, sbuf %p, bid %d, global_env.iop %p\n", + &mainbuf, &sharedbuf, bufid, global_env.iop)); } - e.iop->prev = ~'\n'; - e.iop->peekc = 0; - e.iop->xchar = 0; - e.iop->nlcount = 0; + global_env.iop->prev = ~'\n'; + global_env.iop->peekc = 0; + global_env.iop->xchar = 0; + global_env.iop->nlcount = 0; if (fn == filechar || fn == linechar) - e.iop->task = XIO; + global_env.iop->task = XIO; else if (fn == (int (*)(struct ioarg *)) gravechar - || fn == (int (*)(struct ioarg *)) qgravechar) - e.iop->task = XGRAVE; + || fn == (int (*)(struct ioarg *)) qgravechar) + global_env.iop->task = XGRAVE; else - e.iop->task = XOTHER; - - return; + global_env.iop->task = XOTHER; } static struct io *setbase(struct io *ip) { struct io *xp; - xp = e.iobase; - e.iobase = ip; - return (xp); + xp = global_env.iobase; + global_env.iobase = ip; + return xp; } /* @@ -4731,19 +4602,20 @@ static struct io *setbase(struct io *ip) */ /* - * Produce the characters of a string, then a newline, then EOF. + * Produce the characters of a string, then a newline, then NUL. */ static int nlchar(struct ioarg *ap) { - int c; + char c; if (ap->aword == NULL) - return (0); - if ((c = *ap->aword++) == 0) { + return '\0'; + c = *ap->aword++; + if (c == '\0') { ap->aword = NULL; - return ('\n'); + return '\n'; } - return (c); + return c; } /* @@ -4755,16 +4627,18 @@ static int wdchar(struct ioarg *ap) char c; char **wl; - if ((wl = ap->awordlist) == NULL) - return (0); + wl = ap->awordlist; + if (wl == NULL) + return 0; if (*wl != NULL) { - if ((c = *(*wl)++) != 0) - return (c & 0177); + c = *(*wl)++; + if (c != 0) + return c & 0177; ap->awordlist++; - return (' '); + return ' '; } ap->awordlist = NULL; - return ('\n'); + return '\n'; } /* @@ -4775,11 +4649,12 @@ static int dolchar(struct ioarg *ap) { char *wp; - if ((wp = *ap->awordlist++) != NULL) { + wp = *ap->awordlist++; + if (wp != NULL) { PUSHIO(aword, wp, *ap->awordlist == NULL ? strchar : xxchar); - return (-1); + return -1; } - return (0); + return 0; } static int xxchar(struct ioarg *ap) @@ -4787,12 +4662,13 @@ static int xxchar(struct ioarg *ap) int c; if (ap->aword == NULL) - return (0); - if ((c = *ap->aword++) == '\0') { + return 0; + c = *ap->aword++; + if (c == '\0') { ap->aword = NULL; - return (' '); + return ' '; } - return (c); + return c; } /* @@ -4800,11 +4676,9 @@ static int xxchar(struct ioarg *ap) */ static int strchar(struct ioarg *ap) { - int c; - - if (ap->aword == NULL || (c = *ap->aword++) == 0) - return (0); - return (c); + if (ap->aword == NULL) + return 0; + return *ap->aword++; } /* @@ -4814,9 +4688,12 @@ static int qstrchar(struct ioarg *ap) { int c; - if (ap->aword == NULL || (c = *ap->aword++) == 0) - return (0); - return (c | QUOTE); + if (ap->aword == NULL) + return 0; + c = *ap->aword++; + if (c) + c |= QUOTE; + return c; } /* @@ -4829,45 +4706,44 @@ static int filechar(struct ioarg *ap) struct iobuf *bp = ap->afbuf; if (ap->afid != AFID_NOBUF) { - if ((i = ap->afid != bp->id) || bp->bufp == bp->ebufp) { - + i = (ap->afid != bp->id); + if (i || bp->bufp == bp->ebufp) { if (i) - lseek(ap->afile, ap->afpos, 0); - - i = safe_read(ap->afile, bp->buf, sizeof(bp->buf)); + lseek(ap->afile, ap->afpos, SEEK_SET); + i = nonblock_safe_read(ap->afile, bp->buf, sizeof(bp->buf)); if (i <= 0) { closef(ap->afile); return 0; } bp->id = ap->afid; - bp->ebufp = (bp->bufp = bp->buf) + i; + bp->bufp = bp->buf; + bp->ebufp = bp->bufp + i; } ap->afpos++; return *bp->bufp++ & 0177; } -#ifdef CONFIG_FEATURE_COMMAND_EDITING +#if ENABLE_FEATURE_EDITING if (interactive && isatty(ap->afile)) { - static char mycommand[BUFSIZ]; + /* moved to G: static char filechar_cmdbuf[BUFSIZ]; */ static int position = 0, size = 0; while (size == 0 || position >= size) { - cmdedit_read_input(current_prompt, mycommand); - size = strlen(mycommand); + size = read_line_input(current_prompt, filechar_cmdbuf, BUFSIZ, line_input_state); + if (size < 0) /* Error/EOF */ + exit(0); position = 0; + /* if Ctrl-C, size == 0 and loop will repeat */ } - c = mycommand[position]; + c = filechar_cmdbuf[position]; position++; - return (c); - } else -#endif - - { - i = safe_read(ap->afile, &c, sizeof(c)); - return (i == sizeof(c) ? (c & 0x7f) : (closef(ap->afile), 0)); + return c; } +#endif + i = nonblock_safe_read(ap->afile, &c, sizeof(c)); + return i == sizeof(c) ? (c & 0x7f) : (closef(ap->afile), 0); } /* @@ -4877,13 +4753,11 @@ static int herechar(struct ioarg *ap) { char c; - - if (read(ap->afile, &c, sizeof(c)) != sizeof(c)) { + if (nonblock_safe_read(ap->afile, &c, sizeof(c)) != sizeof(c)) { close(ap->afile); - c = 0; + c = '\0'; } - return (c); - + return c; } /* @@ -4894,9 +4768,10 @@ static int gravechar(struct ioarg *ap, struct io *iop) { int c; - if ((c = qgravechar(ap, iop) & ~QUOTE) == '\n') + c = qgravechar(ap, iop) & ~QUOTE; + if (c == '\n') c = ' '; - return (c); + return c; } static int qgravechar(struct ioarg *ap, struct io *iop) @@ -4908,7 +4783,7 @@ static int qgravechar(struct ioarg *ap, struct io *iop) if (iop->xchar) { if (iop->nlcount) { iop->nlcount--; - return ('\n' | QUOTE); + return '\n' | QUOTE; } c = iop->xchar; iop->xchar = 0; @@ -4918,11 +4793,11 @@ static int qgravechar(struct ioarg *ap, struct io *iop) iop->nlcount++; iop->xchar = c; if (c == 0) - return (c); + return c; iop->nlcount--; c = '\n'; } - return (c != 0 ? c | QUOTE : 0); + return c != 0 ? c | QUOTE : 0; } /* @@ -4932,41 +4807,16 @@ static int linechar(struct ioarg *ap) { int c; - if ((c = filechar(ap)) == '\n') { + c = filechar(ap); + if (c == '\n') { if (!multiline) { closef(ap->afile); ap->afile = -1; /* illegal value */ } } - return (c); -} - -static void prs(const char *s) -{ - if (*s) - write(2, s, strlen(s)); -} - -static void prn(unsigned u) -{ - prs(itoa(u)); -} - -static void closef(int i) -{ - if (i > 2) - close(i); -} - -static void closeall(void) -{ - int u; - - for (u = NUFILE; u < NOFILE;) - close(u++); + return c; } - /* * remap fd into Shell's fd space */ @@ -4976,10 +4826,9 @@ static int remap(int fd) int map[NOFILE]; int newfd; + DBGPRINTF(("REMAP: fd=%d, global_env.iofd=%d\n", fd, global_env.iofd)); - DBGPRINTF(("REMAP: fd=%d, e.iofd=%d\n", fd, e.iofd)); - - if (fd < e.iofd) { + if (fd < global_env.iofd) { for (i = 0; i < NOFILE; i++) map[i] = 0; @@ -4987,7 +4836,7 @@ static int remap(int fd) map[fd] = 1; newfd = dup(fd); fd = newfd; - } while (fd >= 0 && fd < e.iofd); + } while (fd >= 0 && fd < global_env.iofd); for (i = 0; i < NOFILE; i++) if (map[i]) @@ -4997,26 +4846,28 @@ static int remap(int fd) err("too many files open in shell"); } - return (fd); + return fd; } static int openpipe(int *pv) { int i; - if ((i = pipe(pv)) < 0) + i = pipe(pv); + if (i < 0) err("can't create pipe - try again"); - return (i); + return i; } static void closepipe(int *pv) { if (pv != NULL) { - close(*pv++); - close(*pv); + close(pv[0]); + close(pv[1]); } } + /* -------- here.c -------- */ /* @@ -5029,8 +4880,8 @@ static void markhere(char *s, struct ioword *iop) DBGPRINTF7(("MARKHERE: enter, s=%p\n", s)); - h = (struct here *) space(sizeof(struct here)); - if (h == 0) + h = get_space(sizeof(struct here)); + if (h == NULL) return; h->h_tag = evalstr(s, DOSUB); @@ -5042,19 +4893,22 @@ static void markhere(char *s, struct ioword *iop) h->h_next = NULL; if (inhere == 0) inhere = h; - else - for (lh = inhere; lh != NULL; lh = lh->h_next) + else { + for (lh = inhere; lh != NULL; lh = lh->h_next) { if (lh->h_next == 0) { lh->h_next = h; break; } + } + } iop->io_flag |= IOHERE | IOXHERE; - for (s = h->h_tag; *s; s++) + for (s = h->h_tag; *s; s++) { if (*s & QUOTE) { iop->io_flag &= ~IOXHERE; *s &= ~QUOTE; } - h->h_dosub = iop->io_flag & IOXHERE; + } + h->h_dosub = ((iop->io_flag & IOXHERE) ? '\0' : '\''); } static void gethere(void) @@ -5065,7 +4919,7 @@ static void gethere(void) /* Scan here files first leaving inhere list in place */ for (hp = h = inhere; h != NULL; hp = h, h = h->h_next) - readhere(&h->h_iop->io_name, h->h_tag, h->h_dosub ? 0 : '\''); + readhere(&h->h_iop->io_name, h->h_tag, h->h_dosub /* NUL or ' */); /* Make inhere list active - keep list intact for scraphere */ if (hp != NULL) { @@ -5091,14 +4945,15 @@ static void readhere(char **name, char *s, int ec) return; *name = strsave(tname, areanum); - if (newenv(setjmp(errpt = ev)) != 0) + errpt = ev; + if (newenv(setjmp(errpt)) != 0) unlink(tname); else { - pushio(e.iop->argp, (int (*)(struct ioarg *)) e.iop->iofn); - e.iobase = e.iop; + pushio(global_env.iop->argp, (int (*)(struct ioarg *)) global_env.iop->iofn); + global_env.iobase = global_env.iop; for (;;) { - if (interactive && e.iop <= iostack) { -#ifdef CONFIG_FEATURE_COMMAND_EDITING + if (interactive && global_env.iop <= iostack) { +#if ENABLE_FEATURE_EDITING current_prompt = cprompt->value; #else prs(cprompt->value); @@ -5144,13 +4999,13 @@ static int herein(char *hname, int xdoll) (void) &tf; #endif if (hname == NULL) - return (-1); + return -1; DBGPRINTF7(("HEREIN: hname is %s, xdoll=%d\n", hname, xdoll)); - hf = open(hname, 0); + hf = open(hname, O_RDONLY); if (hf < 0) - return (-1); + return -1; if (xdoll) { char c; @@ -5159,10 +5014,11 @@ static int herein(char *hname, int xdoll) tf = mkstemp(tname); if (tf < 0) - return (-1); - if (newenv(setjmp(errpt = ev)) == 0) { + return -1; + errpt = ev; + if (newenv(setjmp(errpt)) == 0) { PUSHIO(afile, hf, herechar); - setbase(e.iop); + setbase(global_env.iop); while ((c = subgetc(0, 0)) != 0) { c &= ~QUOTE; write(tf, &c, sizeof c); @@ -5171,11 +5027,11 @@ static int herein(char *hname, int xdoll) } else unlink(tname); close(tf); - tf = open(tname, 0); + tf = open(tname, O_RDONLY); unlink(tname); - return (tf); - } else - return (hf); + return tf; + } + return hf; } static void scraphere(void) @@ -5199,7 +5055,7 @@ static void freehere(int area) DBGPRINTF6(("FREEHERE: enter, area=%d\n", area)); hl = NULL; - for (h = acthere; h != NULL; h = h->h_next) + for (h = acthere; h != NULL; h = h->h_next) { if (getarea((char *) h) >= area) { if (h->h_iop->io_name != NULL) unlink(h->h_iop->io_name); @@ -5207,11 +5063,228 @@ static void freehere(int area) acthere = h->h_next; else hl->h_next = h->h_next; - } else + } else { hl = h; + } + } } +/* -------- sh.c -------- */ +/* + * shell + */ + +int msh_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int msh_main(int argc, char **argv) +{ + int f; + char *s; + int cflag; + char *name, **ap; + int (*iof) (struct ioarg *); + + INIT_G(); + + sharedbuf.id = AFID_NOBUF; + mainbuf.id = AFID_NOBUF; + elinep = line + sizeof(line) - 5; + +#if ENABLE_FEATURE_EDITING + line_input_state = new_line_input_t(FOR_SHELL); +#endif + + DBGPRINTF(("MSH_MAIN: argc %d, environ %p\n", argc, environ)); + + initarea(); + ap = environ; + if (ap != NULL) { + while (*ap) + assign(*ap++, !COPYV); + for (ap = environ; *ap;) + export(lookup(*ap++)); + } + closeall(); + areanum = 1; + + shell = lookup("SHELL"); + if (shell->value == null) + setval(shell, (char *)DEFAULT_SHELL); + export(shell); + + homedir = lookup("HOME"); + if (homedir->value == null) + setval(homedir, "/"); + export(homedir); + + setval(lookup("$"), putn(getpid())); + + path = lookup("PATH"); + if (path->value == null) { + /* Can be merged with same string elsewhere in bbox */ + if (geteuid() == 0) + setval(path, bb_default_root_path); + else + setval(path, bb_default_path); + } + export(path); + + ifs = lookup("IFS"); + if (ifs->value == null) + setval(ifs, " \t\n"); + +#ifdef MSHDEBUG + mshdbg_var = lookup("MSHDEBUG"); + if (mshdbg_var->value == null) + setval(mshdbg_var, "0"); +#endif + + prompt = lookup("PS1"); +#if ENABLE_FEATURE_EDITING_FANCY_PROMPT + if (prompt->value == null) +#endif + setval(prompt, DEFAULT_USER_PROMPT); + if (geteuid() == 0) { + setval(prompt, DEFAULT_ROOT_PROMPT); + prompt->status &= ~EXPORT; + } + cprompt = lookup("PS2"); +#if ENABLE_FEATURE_EDITING_FANCY_PROMPT + if (cprompt->value == null) +#endif + setval(cprompt, "> "); + + iof = filechar; + cflag = 0; + name = *argv++; + if (--argc >= 1) { + if (argv[0][0] == '-' && argv[0][1] != '\0') { + for (s = argv[0] + 1; *s; s++) + switch (*s) { + case 'c': + prompt->status &= ~EXPORT; + cprompt->status &= ~EXPORT; + setval(prompt, ""); + setval(cprompt, ""); + cflag = 1; + if (--argc > 0) + PUSHIO(aword, *++argv, iof = nlchar); + break; + + case 'q': + qflag = SIG_DFL; + break; + + case 's': + /* standard input */ + break; + + case 't': + prompt->status &= ~EXPORT; + setval(prompt, ""); + iof = linechar; + break; + + case 'i': + interactive = 1; + default: + if (*s >= 'a' && *s <= 'z') + FLAG[(int) *s]++; + } + } else { + argv--; + argc++; + } + + if (iof == filechar && --argc > 0) { + setval(prompt, ""); + setval(cprompt, ""); + prompt->status &= ~EXPORT; + cprompt->status &= ~EXPORT; + +/* Shell is non-interactive, activate printf-based debug */ +#ifdef MSHDEBUG + mshdbg = (int) (((char) (mshdbg_var->value[0])) - '0'); + if (mshdbg < 0) + mshdbg = 0; +#endif + DBGPRINTF(("MSH_MAIN: calling newfile()\n")); + + name = *++argv; + if (newfile(name)) + exit(1); /* Exit on error */ + } + } + + setdash(); + + /* This won't be true if PUSHIO has been called, say from newfile() above */ + if (global_env.iop < iostack) { + PUSHIO(afile, 0, iof); + if (isatty(0) && isatty(1) && !cflag) { + interactive = 1; +#if !ENABLE_FEATURE_SH_EXTRA_QUIET +#ifdef MSHDEBUG + printf("\n\n%s built-in shell (msh with debug)\n", bb_banner); +#else + printf("\n\n%s built-in shell (msh)\n", bb_banner); +#endif + printf("Enter 'help' for a list of built-in commands.\n\n"); +#endif + } + } + + signal(SIGQUIT, qflag); + if (name && name[0] == '-') { + interactive = 1; + f = open(".profile", O_RDONLY); + if (f >= 0) + next(remap(f)); + f = open("/etc/profile", O_RDONLY); + if (f >= 0) + next(remap(f)); + } + if (interactive) + signal(SIGTERM, sig); + + if (signal(SIGINT, SIG_IGN) != SIG_IGN) + signal(SIGINT, onintr); + +/* Handle "msh SCRIPT VAR=val params..." */ +/* Disabled: bash does not do it! */ +#if 0 + argv++; + /* skip leading args of the form VAR=val */ + while (*argv && assign(*argv, !COPYV)) { + argc--; + argv++; + } + argv--; +#endif + dolv = argv; + dolc = argc; + dolv[0] = name; + + setval(lookup("#"), putn((--dolc < 0) ? (dolc = 0) : dolc)); + + DBGPRINTF(("MSH_MAIN: begin FOR loop, interactive %d, global_env.iop %p, iostack %p\n", interactive, global_env.iop, iostack)); + + for (;;) { + if (interactive && global_env.iop <= iostack) { +#if ENABLE_FEATURE_EDITING + current_prompt = prompt->value; +#else + prs(prompt->value); +#endif + } + onecommand(); + /* Ensure that getenv("PATH") stays current */ + setenv("PATH", path->value, 1); + } + + DBGPRINTF(("MSH_MAIN: returning.\n")); +} + /* * Copyright (c) 1987,1997, Prentice Hall