* Original copyright notice is retained at the end of this file.
*/
+#include "busybox.h"
#include <ctype.h>
#include <dirent.h>
#include <errno.h>
#include <sys/wait.h>
#include "cmdedit.h"
-#include "busybox.h"
+
+
+/* Conditional use of "register" keyword */
+#define REGISTER register
+
+
+/*#define MSHDEBUG 1*/
+
+#ifdef MSHDEBUG
+int mshdbg = 0;
+
+#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;
+
+#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)
+
+#endif /* MSHDEBUG */
+
+
+#ifdef CONFIG_FEATURE_SH_FANCY_PROMPT
+# define DEFAULT_ROOT_PROMPT "\\u:\\w> "
+# define DEFAULT_USER_PROMPT "\\u:\\w$ "
+#else
+# define DEFAULT_ROOT_PROMPT "# "
+# define DEFAULT_USER_PROMPT "$ "
+#endif
/* -------- sh.h -------- */
* shell
*/
-#define LINELIM 2100
-#define NPUSH 8 /* limit to input nesting */
+#define LINELIM 2100
+#define NPUSH 8 /* limit to input nesting */
#undef NOFILE
-#define NOFILE 20 /* Number of open files */
-#define NUFILE 10 /* Number of user-accessible files */
-#define FDBASE 10 /* First file usable by Shell */
+#define NOFILE 20 /* Number of open files */
+#define NUFILE 10 /* Number of user-accessible files */
+#define FDBASE 10 /* First file usable by Shell */
/*
* values returned by wait
*/
-#define WAITSIG(s) ((s)&0177)
-#define WAITVAL(s) (((s)>>8)&0377)
+#define WAITSIG(s) ((s)&0177)
+#define WAITVAL(s) (((s)>>8)&0377)
#define WAITCORE(s) (((s)&0200)!=0)
/*
#define TPAREN 2 /* (c-list) */
#define TPIPE 3 /* a | b */
#define TLIST 4 /* a [&;] b */
-#define TOR 5 /* || */
+#define TOR 5 /* || */
#define TAND 6 /* && */
#define TFOR 7
-#define TDO 8
+#define TDO 8
#define TCASE 9
-#define TIF 10
+#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
+
+/* Strings for names to make debug easier */
+#ifdef MSHDEBUG
+static char *T_CMD_NAMES[] = {
+ "PLACEHOLDER",
+ "TCOM",
+ "TPAREN",
+ "TPIPE",
+ "TLIST",
+ "TOR",
+ "TAND",
+ "TFOR",
+ "TDO",
+ "TCASE",
+ "TIF",
+ "TWHILE",
+ "TUNTIL",
+ "TELIF",
+ "TPAT",
+ "TBRACE",
+ "TASYNC",
+ "TDOT",
+};
+#endif
/*
* actions determining the environment of a process
#define BIT(i) (1<<(i))
#define FEXEC BIT(0) /* execute without forking */
+#if 0 /* Original value */
+#define AREASIZE (65000)
+#else
+#define AREASIZE (90000)
+#endif
+
/*
* 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)
-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 xint *failpt;
-static xint *errpt;
-static struct brkcon *brklist;
-static int isbreak;
+/* PROTOTYPES */
static int newfile(char *s);
static char *findeq(char *cp);
static char *cclass(char *p, int sub);
struct brkcon *nextlev;
};
+
/*
* redirection
*/
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 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 */
-static struct wdblock *wdlist;
-static struct wdblock *iolist;
+
/*
* parsing & execution environment
char *linep;
struct io *iobase;
struct io *iop;
- xint *errpt;
+ xint *errpt; /* void * */
int iofd;
struct env *oenv;
} e;
static char line[LINELIM];
static char *elinep;
+
/*
* 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 struct wdblock *glob(char *cp, struct wdblock *wb);
static int my_getc(int ec);
static int subgetc(int ec, int quoted);
-static char **makenv(void);
+static char **makenv(int all, struct wdblock *wb);
static char **eval(char **ap, int f);
static int setstatus(int s);
static int waitfor(int lastpid, int canintr);
static void runtrap(int i);
static int gmatch(char *s, char *p);
+
/*
* error handling
*/
/* -------- area stuff -------- */
-#define REGSIZE sizeof(struct region)
-#define GROWBY 256
-//#define SHRINKBY 64
+#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 FREE (32767)
+#define BUSY (0)
+#define ALIGN (sizeof(int)-1)
struct region {
#define LOGAND 257
#define LOGOR 258
#define BREAK 259
-#define IF 260
+#define IF 260
#define THEN 261
#define ELSE 262
#define ELIF 263
-#define FI 264
+#define FI 264
#define CASE 265
#define ESAC 266
-#define FOR 267
+#define FOR 267
#define WHILE 268
#define UNTIL 269
-#define DO 270
+#define DO 270
#define DONE 271
-#define IN 272
+#define IN 272
+/* Added for "." file expansion */
+#define DOT 273
+
#define YYERRCODE 300
/* flags to yylex */
#define CONTIN 01 /* skip new lines to complete command */
#define SYNTAXERR zzerr()
+
static struct op *pipeline(int cf);
static struct op *andor(void);
static struct op *c_list(void);
#define EXPORT 02 /* variable is to be exported */
#define GETCELL 04 /* name & value space was got with getcell */
-static struct var *vlist; /* dictionary */
-
-static struct var *homedir; /* home directory */
-static struct var *prompt; /* main prompt */
-static struct var *cprompt; /* continuation prompt */
-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 yyparse(void);
static struct var *lookup(char *n);
static void setval(struct var *vp, char *val);
static int execute(struct op *t, int *pin, int *pout, int act);
+
/* -------- io.h -------- */
/* io buffer */
struct iobuf {
/* in substitution */
#define INSUB() (e.iop->task == XGRAVE || e.iop->task == XDOLL)
+
/*
* input generators for IO structure
*/
static int herein(char *hname, int xdoll);
static int run(struct ioarg *argp, int (*f) (struct ioarg *));
+
/*
* IO functions
*/
static int readc(void);
static void unget(int c);
static void ioecho(int c);
-static void prs(char *s);
+static void prs(const char *s);
static void prn(unsigned u);
static void closef(int i);
static void closeall(void);
+
/*
* IO control
*/
static void closepipe(int *pv);
static struct io *setbase(struct io *ip);
-static struct ioarg temparg; /* temporary for PUSHIO */
-
#define PUSHIO(what,arg,gen) ((temparg.what = (arg)),pushio(&temparg,(gen)))
#define RUN(what,arg,gen) ((temparg.what = (arg)), run(&temparg,(gen)))
static void freecell(char *cp);
static int areanum; /* current allocation area */
-#define NEW(type) (type *)getcell(sizeof(type))
+#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,
- int *pforked);
+static int forkexec(struct op *t, int *pin, int *pout, int act, char **wp);
static int iosetup(struct ioword *iop, int pipein, int pipeout);
static void echo(char **wp);
static struct op **find1case(struct op *t, char *w);
struct here *h_next;
};
-static char *signame[] = {
+static const char * const signame[] = {
"Signal 0",
"Hangup",
(char *) NULL, /* interrupt */
#define NSIGNAL (sizeof(signame)/sizeof(signame[0]))
struct res {
- char *r_name;
+ const char *r_name;
int r_val;
};
-static struct res restab[] = {
+static const struct res restab[] = {
{"for", FOR},
{"case", CASE},
{"esac", ESAC},
{"elif", ELIF},
{"until", UNTIL},
{"fi", FI},
-
{";;", BREAK},
{"||", LOGOR},
{"&&", LOGAND},
{"{", '{'},
{"}", '}'},
+ {".", DOT},
{0, 0},
};
{0, 0}
};
+static struct op *scantree(struct op *);
+static struct op *dowholefile(int, int);
+
/* Globals */
extern char **environ; /* environment pointer */
+
static char **dolv;
static int dolc;
static int exstat;
static int trapset; /* trap pending */
static int yynerrs; /* yacc */
static char line[LINELIM];
+
+#ifdef MSHDEBUG
+static struct var *mshdbg_var;
+#endif
static struct var *vlist; /* dictionary */
static struct var *homedir; /* home directory */
static struct var *prompt; /* main prompt */
static struct var *path; /* search path for commands */
static struct var *shell; /* shell to interpret command files */
static struct var *ifs; /* field separators */
-static struct ioarg ioargstack[NPUSH];
-static struct io iostack[NPUSH];
+
static int areanum; /* current allocation area */
static int intr;
static int inparse;
static char flags['z' - 'a' + 1];
static char *flag = flags - 'a';
-static char *elinep = line + sizeof(line) - 5;
static char *null = "";
static int heedint = 1;
-static struct env e =
- { line, iostack, iostack - 1, (xint *) NULL, FDBASE,
-(struct env *) NULL };
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 ioarg temparg = { 0, 0, 0, AFID_NOBUF, 0 };
+
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 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 */
+};
+
+#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));
+
+ if (t->words) {
+ DBGPRINTF(("T: W1: %s", t->words[0]));
+ }
+
+ return;
+}
+
+void print_tree(struct op *head);
+void print_tree(struct op *head)
+{
+ if (head == NULL) {
+ DBGPRINTF(("PRINT_TREE: no tree\n"));
+ return;
+ }
+
+ DBGPRINTF(("NODE: %p, left %p, right %p\n", head, head->left,
+ head->right));
+
+ if (head->left)
+ print_tree(head->left);
+
+ if (head->right)
+ print_tree(head->right);
+
+ return;
+}
+#endif /* MSHDEBUG */
+
#ifdef CONFIG_FEATURE_COMMAND_EDITING
static char *current_prompt;
*/
-extern int msh_main(int argc, char **argv)
+int msh_main(int argc, char **argv)
{
- register int f;
- register char *s;
+ REGISTER int f;
+ REGISTER char *s;
int cflag;
char *name, **ap;
int (*iof) (struct ioarg *);
+ DBGPRINTF(("MSH_MAIN: argc %d, environ %p\n", argc, environ));
+
initarea();
if ((ap = environ) != NULL) {
while (*ap)
shell = lookup("SHELL");
if (shell->value == null)
- setval(shell, DEFAULT_SHELL);
+ setval(shell, (char *)DEFAULT_SHELL);
export(shell);
homedir = lookup("HOME");
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");
#ifdef CONFIG_FEATURE_SH_FANCY_PROMPT
if (prompt->value == null)
#endif
- setval(prompt, "$ ");
+ setval(prompt, DEFAULT_USER_PROMPT);
if (geteuid() == 0) {
- setval(prompt, "# ");
+ setval(prompt, DEFAULT_ROOT_PROMPT);
prompt->status &= ~EXPORT;
}
cprompt = lookup("PS2");
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"));
+
if (newfile(name = *++argv))
- exit(1);
+ exit(1); /* Exit on error */
}
}
+
setdash();
+
+ /* 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
- printf("\n\n" BB_BANNER " Built-in shell (msh)\n");
+#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++;
}
if (interactive)
signal(SIGTERM, sig);
+
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
signal(SIGINT, onintr);
dolv = argv;
}
setval(lookup("#"), putn((--dolc < 0) ? (dolc = 0) : dolc));
+ DBGPRINTF(("MSH_MAIN: begin FOR loop, interactive %d, e.iop %p, iostack %p\n", interactive, e.iop, iostack));
+
for (;;) {
if (interactive && e.iop <= iostack) {
#ifdef CONFIG_FEATURE_COMMAND_EDITING
/* Ensure that getenv("PATH") stays current */
setenv("PATH", path->value, 1);
}
+
+ DBGPRINTF(("MSH_MAIN: returning.\n"));
}
static void setdash()
{
- register char *cp;
- register int c;
+ REGISTER char *cp;
+ REGISTER int c;
char m['z' - 'a' + 1];
cp = m;
}
static int newfile(s)
-register char *s;
+REGISTER char *s;
{
- register int f;
+ REGISTER int f;
+
+ DBGPRINTF7(("NEWFILE: opening %s\n", s));
if (strcmp(s, "-") != 0) {
+ DBGPRINTF(("NEWFILE: s is %s\n", s));
f = open(s, 0);
if (f < 0) {
prs(s);
}
} else
f = 0;
+
next(remap(f));
return (0);
}
+
+struct op *scantree(head)
+struct op *head;
+{
+ struct op *dotnode;
+
+ if (head == NULL)
+ return (NULL);
+
+ if (head->left != NULL) {
+ dotnode = scantree(head->left);
+ if (dotnode)
+ return (dotnode);
+ }
+
+ if (head->right != NULL) {
+ dotnode = scantree(head->right);
+ if (dotnode)
+ return (dotnode);
+ }
+
+ if (head->words == NULL)
+ return (NULL);
+
+ DBGPRINTF5(("SCANTREE: checking node %p\n", head));
+
+ if ((head->type != TDOT) && (strcmp(".", head->words[0]) == 0)) {
+ DBGPRINTF5(("SCANTREE: dot found in node %p\n", head));
+ return (head);
+ }
+
+ return (NULL);
+}
+
+
static void onecommand()
{
- register int i;
+ REGISTER int i;
jmp_buf m1;
+ DBGPRINTF(("ONECOMMAND: enter, outtree=%p\n", outtree));
+
while (e.oenv)
quitenv();
+
areanum = 1;
freehere(areanum);
freearea(areanum);
inparse = 1;
intr = 0;
execflg = 0;
+
setjmp(failpt = m1); /* Bruce Evans' fix */
if (setjmp(failpt = m1) || yyparse() || intr) {
+
+ DBGPRINTF(("ONECOMMAND: this is not good.\n"));
+
while (e.oenv)
quitenv();
scraphere();
intr = 0;
return;
}
+
inparse = 0;
brklist = 0;
intr = 0;
execflg = 0;
- if (!flag['n'])
+
+ if (!flag['n']) {
+ DBGPRINTF(("ONECOMMAND: calling execute, t=outtree=%p\n",
+ outtree));
execute(outtree, NOPIPE, NOPIPE, 0);
+ }
+
if (!interactive && intr) {
execflg = 0;
leave();
}
+
if ((i = trapset) != 0) {
trapset = 0;
runtrap(i);
static void leave()
{
+ DBGPRINTF(("LEAVE: leave called!\n"));
+
if (execflg)
fail();
scraphere();
freehere(1);
runtrap(0);
- exit(exstat);
+ _exit(exstat);
/* NOTREACHED */
}
static void warn(s)
-register char *s;
+REGISTER char *s;
{
if (*s) {
prs(s);
static int newenv(f)
int f;
{
- register struct env *ep;
+ REGISTER struct env *ep;
+
+ DBGPRINTF(("NEWENV: f=%d (indicates quitenv and return)\n", f));
if (f) {
quitenv();
return (1);
}
+
ep = (struct env *) space(sizeof(*ep));
if (ep == NULL) {
while (e.oenv)
*ep = e;
e.oenv = ep;
e.errpt = errpt;
+
return (0);
}
static void quitenv()
{
- register struct env *ep;
- register int fd;
+ REGISTER struct env *ep;
+ REGISTER int fd;
+
+ DBGPRINTF(("QUITENV: e.oenv=%p\n", e.oenv));
if ((ep = e.oenv) != NULL) {
fd = e.iofd;
* Is any character from s1 in s2?
*/
static int anys(s1, s2)
-register char *s1, *s2;
+REGISTER char *s1, *s2;
{
while (*s1)
if (any(*s1++, s2))
* Is character c in s?
*/
static int any(c, s)
-register int c;
-register char *s;
+REGISTER int c;
+REGISTER char *s;
{
while (*s)
if (*s++ == c)
}
static char *putn(n)
-register int n;
+REGISTER int n;
{
return (itoa(n));
}
static char *itoa(n)
-register int n;
+REGISTER int n;
{
static char s[20];
return (s);
}
+
static void next(int f)
{
PUSHIO(afile, f, filechar);
static char *space(n)
int n;
{
- register char *cp;
+ REGISTER char *cp;
if ((cp = getcell(n)) == 0)
err("out of string space");
}
static char *strsave(s, a)
-register char *s;
+REGISTER char *s;
int a;
{
- register char *cp, *xp;
+ REGISTER char *cp, *xp;
if ((cp = space(strlen(s) + 1)) != NULL) {
setarea((char *) cp, a);
* trap handling
*/
static void sig(i)
-register int i;
+REGISTER int i;
{
trapset = i;
signal(i, sig);
if ((trapstr = trap[i]) == NULL)
return;
+
if (i == 0)
trap[i] = 0;
+
RUN(aword, trapstr, nlchar);
}
* return a null value.
*/
static struct var *lookup(n)
-register char *n;
+REGISTER char *n;
{
- register struct var *vp;
- register char *cp;
- register int c;
+ REGISTER struct var *vp;
+ REGISTER char *cp;
+ REGISTER int c;
static struct var dummy;
if (isdigit(*n)) {
* values is reasonably painless.
*/
static void nameval(vp, val, name)
-register struct var *vp;
+REGISTER struct var *vp;
char *val, *name;
{
- register char *cp, *xp;
+ REGISTER char *cp, *xp;
char *nv;
int fl;
}
static int isassign(s)
-register char *s;
+REGISTER 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(s, cf)
-register char *s;
+REGISTER char *s;
int cf;
{
- register char *cp;
+ REGISTER 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++)
}
static int checkname(cp)
-register char *cp;
+REGISTER char *cp;
{
+ DBGPRINTF7(("CHECKNAME: enter, cp=%s\n", cp));
+
if (!isalpha(*cp++) && *(cp - 1) != '_')
return (0);
while (*cp)
}
static void putvlist(f, out)
-register int f, out;
+REGISTER int f, out;
{
- register struct var *vp;
+ REGISTER struct var *vp;
for (vp = vlist; vp; vp = vp->next)
if (vp->status & f && (isalpha(*vp->name) || *vp->name == '_')) {
}
static int eqname(n1, n2)
-register char *n1, *n2;
+REGISTER char *n1, *n2;
{
for (; *n1 != '=' && *n1 != 0; n1++)
if (*n2++ != *n1)
}
static char *findeq(cp)
-register char *cp;
+REGISTER char *cp;
{
while (*cp != '\0' && *cp != '=')
cp++;
#define NOT '!' /* might use ^ */
static int gmatch(s, p)
-register char *s, *p;
+REGISTER char *s, *p;
{
- register int sc, pc;
+ REGISTER int sc, pc;
if (s == NULL || p == NULL)
return (0);
}
static char *cclass(p, sub)
-register char *p;
-register int sub;
+REGISTER char *p;
+REGISTER int sub;
{
- register int c, d, not, found;
+ REGISTER int c, d, not, found;
if ((not = *p == NOT) != 0)
p++;
static void initarea()
{
- brkaddr = malloc(65000);
- brktop = brkaddr + 65000;
+ brkaddr = xmalloc(AREASIZE);
+ brktop = brkaddr + AREASIZE;
- while ((int) sbrk(0) & ALIGN)
+ while ((long) sbrk(0) & ALIGN)
sbrk(1);
areabot = (struct region *) sbrk(REGSIZE);
char *getcell(nbytes)
unsigned nbytes;
{
- register int nregio;
- register struct region *p, *q;
- register int i;
+ REGISTER int nregio;
+ REGISTER struct region *p, *q;
+ REGISTER int i;
if (nbytes == 0) {
puts("getcell(0)");
static void freecell(cp)
char *cp;
{
- register struct region *p;
+ REGISTER struct region *p;
if ((p = (struct region *) cp) != NULL) {
p--;
}
static void freearea(a)
-register int a;
+REGISTER int a;
{
- register struct region *p, *top;
+ REGISTER struct region *p, *top;
top = areatop;
for (p = areabot; p != top; p = p->next)
char *cp;
int a;
{
- register struct region *p;
+ REGISTER struct region *p;
if ((p = (struct region *) cp) != NULL)
(p - 1)->area = a;
static void garbage()
{
- register struct region *p, *q, *top;
+ REGISTER struct region *p, *q, *top;
top = areatop;
for (p = areabot; p != top; p = p->next) {
* shell: syntax (C version)
*/
-
int yyparse()
{
+ DBGPRINTF7(("YYPARSE: enter...\n"));
+
startl = 1;
peeksym = 0;
yynerrs = 0;
static struct op *pipeline(cf)
int cf;
{
- register struct op *t, *p;
- register int c;
+ REGISTER struct op *t, *p;
+ REGISTER int c;
+
+ DBGPRINTF7(("PIPELINE: enter, cf=%d\n", cf));
t = command(cf);
+
+ DBGPRINTF9(("PIPELINE: t=%p\n", t));
+
if (t != NULL) {
while ((c = yylex(0)) == '|') {
- if ((p = command(CONTIN)) == NULL)
+ if ((p = command(CONTIN)) == NULL) {
+ DBGPRINTF8(("PIPELINE: error!\n"));
SYNTAXERR;
+ }
+
if (t->type != TPAREN && t->type != TCOM) {
/* shell statement */
t = block(TPAREN, t, NOBLOCK, NOWORDS);
}
+
t = block(TPIPE, t, p, NOWORDS);
}
peeksym = c;
}
+
+ DBGPRINTF7(("PIPELINE: returning t=%p\n", t));
return (t);
}
static struct op *andor()
{
- register struct op *t, *p;
- register int c;
+ REGISTER struct op *t, *p;
+ REGISTER int c;
+
+ DBGPRINTF7(("ANDOR: enter...\n"));
t = pipeline(0);
+
+ DBGPRINTF9(("ANDOR: t=%p\n", t));
+
if (t != NULL) {
while ((c = yylex(0)) == LOGAND || c == LOGOR) {
- if ((p = pipeline(CONTIN)) == NULL)
+ if ((p = pipeline(CONTIN)) == NULL) {
+ DBGPRINTF8(("ANDOR: error!\n"));
SYNTAXERR;
+ }
+
t = block(c == LOGAND ? TAND : TOR, t, p, NOWORDS);
- }
+ } /* WHILE */
+
peeksym = c;
}
+
+ DBGPRINTF7(("ANDOR: returning t=%p\n", t));
return (t);
}
static struct op *c_list()
{
- register struct op *t, *p;
- register int c;
+ REGISTER struct op *t, *p;
+ REGISTER int c;
+
+ DBGPRINTF7(("C_LIST: enter...\n"));
t = andor();
+
if (t != NULL) {
if ((peeksym = yylex(0)) == '&')
t = block(TASYNC, t, NOBLOCK, NOWORDS);
+
while ((c = yylex(0)) == ';' || c == '&'
|| (multiline && c == '\n')) {
+
if ((p = andor()) == NULL)
return (t);
+
if ((peeksym = yylex(0)) == '&')
p = block(TASYNC, p, NOBLOCK, NOWORDS);
+
t = list(t, p);
- }
+ } /* WHILE */
+
peeksym = c;
}
+ /* IF */
+ DBGPRINTF7(("C_LIST: returning t=%p\n", t));
return (t);
}
-
static int synio(cf)
int cf;
{
- register struct ioword *iop;
- register int i;
- register int c;
+ REGISTER struct ioword *iop;
+ REGISTER int i;
+ REGISTER int c;
+
+ DBGPRINTF7(("SYNIO: enter, cf=%d\n", cf));
if ((c = yylex(cf)) != '<' && c != '>') {
peeksym = c;
return (0);
}
+
i = yylval.i;
musthave(WORD, 0);
iop = io(iounit, i, yylval.cp);
iounit = IODEFAULT;
+
if (i & IOHERE)
markhere(yylval.cp, iop);
+
+ DBGPRINTF7(("SYNIO: returning 1\n"));
return (1);
}
static void musthave(c, cf)
int c, cf;
{
- if ((peeksym = yylex(cf)) != c)
+ if ((peeksym = yylex(cf)) != c) {
+ DBGPRINTF7(("MUSTHAVE: error!\n"));
SYNTAXERR;
+ }
+
peeksym = 0;
}
static struct op *simple()
{
- register struct op *t;
+ REGISTER struct op *t;
t = NULL;
for (;;) {
static struct op *nested(type, mark)
int type, mark;
{
- register struct op *t;
+ REGISTER struct op *t;
+
+ DBGPRINTF3(("NESTED: enter, type=%d, mark=%d\n", type, mark));
multiline++;
t = c_list();
static struct op *command(cf)
int cf;
{
- register struct op *t;
+ REGISTER struct op *t;
struct wdblock *iosave;
- register int c;
+ REGISTER int c;
+
+ DBGPRINTF(("COMMAND: enter, cf=%d\n", cf));
iosave = iolist;
iolist = NULL;
+
if (multiline)
cf |= CONTIN;
+
while (synio(cf))
cf = 0;
- switch (c = yylex(cf)) {
+
+ c = yylex(cf);
+
+ switch (c) {
default:
peeksym = c;
if ((t = simple()) == NULL) {
multiline++;
musthave(IN, CONTIN);
startl++;
+
t->left = caselist();
+
musthave(ESAC, 0);
multiline--;
break;
musthave(FI, 0);
multiline--;
break;
+
+ case DOT:
+ t = newtp();
+ t->type = TDOT;
+
+ 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 */
+ break;
+
}
+
while (synio(0));
+
t = namelist(t);
iolist = iosave;
+
+ DBGPRINTF(("COMMAND: returning %p\n", t));
+
+ return (t);
+}
+
+static struct op *dowholefile(type, mark)
+int type;
+int mark;
+{
+ REGISTER struct op *t;
+
+ DBGPRINTF(("DOWHOLEFILE: enter, type=%d, mark=%d\n", type, mark));
+
+ multiline++;
+ t = c_list();
+ multiline--;
+ t = block(type, t, NOBLOCK, NOWORDS);
+ DBGPRINTF(("DOWHOLEFILE: return t=%p\n", t));
return (t);
}
static struct op *dogroup(onlydone)
int onlydone;
{
- register int c;
- register struct op *mylist;
+ REGISTER int c;
+ REGISTER struct op *mylist;
c = yylex(CONTIN);
if (c == DONE && onlydone)
static struct op *thenpart()
{
- register int c;
- register struct op *t;
+ REGISTER int c;
+ REGISTER struct op *t;
if ((c = yylex(0)) != THEN) {
peeksym = c;
static struct op *elsepart()
{
- register int c;
- register struct op *t;
+ REGISTER int c;
+ REGISTER struct op *t;
switch (c = yylex(0)) {
case ELSE:
static struct op *caselist()
{
- register struct op *t;
+ REGISTER struct op *t;
t = NULL;
- while ((peeksym = yylex(CONTIN)) != ESAC)
+ while ((peeksym = yylex(CONTIN)) != ESAC) {
+ DBGPRINTF(("CASELIST, doing yylex, peeksym=%d\n", peeksym));
t = list(t, casepart());
+ }
+
+ DBGPRINTF(("CASELIST, returning t=%p\n", t));
return (t);
}
static struct op *casepart()
{
- register struct op *t;
+ REGISTER struct op *t;
+
+ DBGPRINTF7(("CASEPART: enter...\n"));
t = newtp();
t->type = TPAT;
t->left = c_list();
if ((peeksym = yylex(CONTIN)) != ESAC)
musthave(BREAK, CONTIN);
+
+ DBGPRINTF7(("CASEPART: made newtp(TPAT, t=%p)\n", t));
+
return (t);
}
static char **pattern()
{
- register int c, cf;
+ REGISTER int c, cf;
cf = CONTIN;
do {
} while ((c = yylex(0)) == '|');
peeksym = c;
word(NOWORD);
+
return (copyw());
}
static char **wordlist()
{
- register int c;
+ REGISTER int c;
if ((c = yylex(0)) != IN) {
peeksym = c;
* supporting functions
*/
static struct op *list(t1, t2)
-register struct op *t1, *t2;
+REGISTER struct op *t1, *t2;
{
+ DBGPRINTF7(("LIST: enter, t1=%p, t2=%p\n", t1, t2));
+
if (t1 == NULL)
return (t2);
if (t2 == NULL)
return (t1);
+
return (block(TLIST, t1, t2, NOWORDS));
}
struct op *t1, *t2;
char **wp;
{
- register struct op *t;
+ REGISTER struct op *t;
+
+ DBGPRINTF7(("BLOCK: enter, type=%d (%s)\n", type, T_CMD_NAMES[type]));
t = newtp();
t->type = type;
t->left = t1;
t->right = t2;
t->words = wp;
+
+ DBGPRINTF7(("BLOCK: inserted %p between %p and %p\n", t, t1,
+ t2));
+
return (t);
}
+/* See if given string is a shell multiline (FOR, IF, etc) */
static int rlookup(n)
-register char *n;
+REGISTER char *n;
{
- register struct res *rp;
+ REGISTER const struct res *rp;
+
+ DBGPRINTF7(("RLOOKUP: enter, n is %s\n", n));
for (rp = restab; rp->r_name; rp++)
- if (strcmp(rp->r_name, n) == 0)
- return (rp->r_val);
- return (0);
+ 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 */
+ }
+
+ DBGPRINTF7(("RLOOKUP: NO match, returning 0\n"));
+ return (0); /* Not a shell multiline */
}
static struct op *newtp()
{
- register struct op *t;
+ REGISTER struct op *t;
t = (struct op *) tree(sizeof(*t));
t->type = 0;
t->left = NULL;
t->right = NULL;
t->str = NULL;
+
+ DBGPRINTF3(("NEWTP: allocated %p\n", t));
+
return (t);
}
static struct op *namelist(t)
-register struct op *t;
+REGISTER struct op *t;
{
+
+ DBGPRINTF7(("NAMELIST: enter, t=%p, type %s, iolist=%p\n", t,
+ T_CMD_NAMES[t->type], iolist));
+
if (iolist) {
iolist = addword((char *) NULL, iolist);
t->ioact = copyio();
} else
t->ioact = NULL;
+
if (t->type != TCOM) {
if (t->type != TPAREN && t->ioact != NULL) {
t = block(TPAREN, t, NOBLOCK, NOWORDS);
}
return (t);
}
+
word(NOWORD);
t->words = copyw();
+
+
return (t);
}
static char **copyw()
{
- register char **wd;
+ REGISTER char **wd;
wd = getwords(wdlist);
wdlist = 0;
static struct ioword **copyio()
{
- register struct ioword **iop;
+ REGISTER struct ioword **iop;
iop = (struct ioword **) getwords(iolist);
iolist = 0;
int f;
char *cp;
{
- register struct ioword *iop;
+ REGISTER struct ioword *iop;
iop = (struct ioword *) tree(sizeof(*iop));
iop->io_unit = u;
static int yylex(cf)
int cf;
{
- register int c, c1;
+ REGISTER int c, c1;
int atstart;
if ((c = peeksym) > 0) {
startl = 1;
return (c);
}
+
+
nlseen = 0;
- e.linep = line;
atstart = startl;
startl = 0;
yylval.i = 0;
+ e.linep = line;
+
+/* MALAMO */
+ line[LINELIM - 1] = '\0';
loop:
- while ((c = my_getc(0)) == ' ' || c == '\t');
+ while ((c = my_getc(0)) == ' ' || c == '\t') /* Skip whitespace */
+ ;
+
switch (c) {
default:
if (any(c, "0123456789")) {
}
break;
- case '#':
+ case '#': /* Comment, skip to next newline or End-of-string */
while ((c = my_getc(0)) != 0 && c != '\n');
unget(c);
goto loop;
case 0:
+ DBGPRINTF5(("YYLEX: return 0, c=%d\n", c));
return (c);
case '$':
+ DBGPRINTF9(("YYLEX: found $\n"));
*e.linep++ = c;
if ((c = my_getc(0)) == '{') {
if ((c = collect(c, '}')) != '\0')
case '|':
case '&':
case ';':
- if ((c1 = dual(c)) != '\0') {
- startl = 1;
- return (c1);
- }
startl = 1;
- return (c);
+ /* If more chars process them, else return NULL char */
+ if ((c1 = dual(c)) != '\0')
+ return (c1);
+ else
+ return (c);
+
case '^':
startl = 1;
return ('|');
unget(c);
pack:
- while ((c = my_getc(0)) != 0 && !any(c, "`$ '\"\t;&<>()|^\n"))
+ while ((c = my_getc(0)) != 0 && !any(c, "`$ '\"\t;&<>()|^\n")) {
if (e.linep >= elinep)
err("word too long");
else
*e.linep++ = c;
+ };
+
unget(c);
+
if (any(c, "\"'`$"))
goto loop;
+
*e.linep++ = '\0';
+
if (atstart && (c = rlookup(line)) != 0) {
startl = 1;
return (c);
}
+
yylval.cp = strsave(line, areanum);
return (WORD);
}
+
static int collect(c, c1)
-register int c, c1;
+REGISTER int c, c1;
{
char s[2];
+ DBGPRINTF8(("COLLECT: enter, c=%d, c1=%d\n", c, c1));
+
*e.linep++ = c;
while ((c = my_getc(c1)) != c1) {
if (c == 0) {
}
*e.linep++ = c;
}
+
*e.linep++ = c;
+
+ DBGPRINTF8(("COLLECT: return 0, line is %s\n", line));
+
return (0);
}
+/* "multiline commands" helper func */
+/* see if next 2 chars form a shell multiline */
static int dual(c)
-register int c;
+REGISTER int c;
{
char s[3];
- register char *cp = s;
+ REGISTER char *cp = s;
- *cp++ = c;
- *cp++ = my_getc(0);
- *cp = 0;
- if ((c = rlookup(s)) == 0)
- unget(*--cp);
- return (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 */
+
+ 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 */
+
+ return (c); /* String is multiline, return numeric multiline (restab) code */
}
static void diag(ec)
-register int ec;
+REGISTER int ec;
{
- register int c;
+ REGISTER int c;
+
+ DBGPRINTF8(("DIAG: enter, ec=%d\n", ec));
c = my_getc(0);
if (c == '>' || c == '<') {
static char *tree(size)
unsigned size;
{
- register char *t;
+ REGISTER char *t;
if ((t = getcell(size)) == NULL) {
+ DBGPRINTF2(("TREE: getcell(%d) failed!\n", size));
prs("command line too complicated\n");
fail();
/* NOTREACHED */
static int execute(t, pin, pout, act)
-register struct op *t;
+REGISTER struct op *t;
int *pin, *pout;
int act;
{
- register struct op *t1;
+ REGISTER struct op *t1;
volatile int i, rv, a;
char *cp, **wp, **wp2;
struct var *vp;
+ struct op *outtree_save;
struct brkcon bc;
#if __GNUC__
(void) ℘
#endif
-
- if (t == NULL)
+ if (t == NULL) {
+ DBGPRINTF4(("EXECUTE: enter, t==null, returning.\n"));
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])));
+
rv = 0;
a = areanum++;
wp = (wp2 = t->words) != NULL
? eval(wp2, t->type == TCOM ? DOALL : DOALL & ~DOKEY)
: NULL;
+/* Hard to know how many words there are, be careful of garbage pointer values */
+/* They are likely to cause "PCI bus fault" errors */
+#if 0
+ DBGPRINTF(("EXECUTE: t->left=%p, t->right=%p, t->words[1] is %s\n",
+ t->left, t->right,
+ ((t->words[1] == NULL) ? "NULL" : t->words[1])));
+ DBGPRINTF7(("EXECUTE: t->words[2] is %s, t->words[3] is %s\n",
+ ((t->words[2] == NULL) ? "NULL" : t->words[2]),
+ ((t->words[3] == NULL) ? "NULL" : t->words[3])));
+#endif
+
+
switch (t->type) {
+ case TDOT:
+ DBGPRINTF3(("EXECUTE: TDOT\n"));
+
+ outtree_save = outtree;
+
+ newfile(evalstr(t->words[0], DOALL));
+
+ t->left = dowholefile(TLIST, 0);
+ t->right = NULL;
+
+ outtree = outtree_save;
+
+ if (t->left)
+ rv = execute(t->left, pin, pout, 0);
+ if (t->right)
+ rv = execute(t->right, pin, pout, 0);
+ break;
+
case TPAREN:
rv = execute(t->left, pin, pout, 0);
break;
case TCOM:
{
- int child;
-
- rv = forkexec(t, pin, pout, act, wp, &child);
- if (child) {
- exstat = rv;
- leave();
- }
+ rv = forkexec(t, pin, pout, act, wp);
}
break;
{
int hinteractive = interactive;
+ DBGPRINTF7(("EXECUTE: TASYNC clause, calling vfork()...\n"));
+
i = vfork();
if (i != 0) {
interactive = hinteractive;
interactive = 0;
if (pin == NULL) {
close(0);
- open("/dev/null", 0);
+ open(bb_dev_null, 0);
}
- exit(execute(t->left, pin, pout, FEXEC));
+ _exit(execute(t->left, pin, pout, FEXEC));
}
}
break;
case TCASE:
if ((cp = evalstr(t->str, DOSUB | DOTRIM)) == 0)
cp = "";
- if ((t1 = findcase(t->left, cp)) != NULL)
+
+ 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) {
+ DBGPRINTF7(("EXECUTE: TCASE, calling execute(t=%p, t1=%p)...\n", t, t1));
rv = execute(t1, pin, pout, 0);
+ DBGPRINTF7(("EXECUTE: TCASE, back from execute(t=%p, t1=%p)...\n", t, t1));
+ }
break;
case TBRACE:
if (rv >= 0 && (t1 = t->left))
rv = execute(t1, pin, pout, 0);
break;
- }
+
+ };
broken:
t->words = wp2;
closeall();
fail();
}
+
if ((i = trapset) != 0) {
trapset = 0;
runtrap(i);
}
+
+ DBGPRINTF(("EXECUTE: returning from t=%p, rv=%d\n", t, rv));
return (rv);
}
static int
-forkexec(register struct op *t, int *pin, int *pout, int act, char **wp,
- int *pforked)
+forkexec(REGISTER struct op *t, int *pin, int *pout, int act, char **wp)
{
+ pid_t newpid;
int i, rv;
int (*shcom) (struct op *) = NULL;
- register int f;
+ REGISTER int f;
char *cp = NULL;
struct ioword **iopp;
int resetsig;
char **owp;
+ int forked = 0;
int *hpin = pin;
int *hpout = pout;
- int hforked;
char *hwp;
int hinteractive;
int hintr;
(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])));
+
+/* Hard to know how many words there are, be careful of garbage pointer values */
+/* They are likely to cause "PCI bus fault" errors */
+#if 0
+ DBGPRINTF7(("FORKEXEC: t->words is %s, t->words[1] is %s\n",
+ ((t->words == NULL) ? "NULL" : t->words[0]),
+ ((t->words == NULL) ? "NULL" : t->words[1])));
+ DBGPRINTF7(("FORKEXEC: wp is %s, wp[1] is %s\n",
+ ((wp == NULL) ? "NULL" : wp[0]),
+ ((wp[1] == NULL) ? "NULL" : wp[1])));
+ DBGPRINTF7(("FORKEXEC: wp2 is %s, wp[3] is %s\n",
+ ((wp[2] == NULL) ? "NULL" : wp[2]),
+ ((wp[3] == NULL) ? "NULL" : wp[3])));
+#endif
+
+
owp = wp;
resetsig = 0;
- *pforked = 0;
rv = -1; /* system-detected error */
if (t->type == TCOM) {
while ((cp = *wp++) != NULL);
/* strip all initial assignments */
/* not correct wrt PATH=yyy command etc */
- if (flag['x'])
+ if (flag['x']) {
+ DBGPRINTF9(("FORKEXEC: echo'ing, cp=%p, wp=%p, owp=%p\n",
+ cp, wp, owp));
echo(cp ? wp : owp);
+ }
+#if 0
+ DBGPRINTF9(("FORKEXEC: t->words is %s, t->words[1] is %s\n",
+ ((t->words == NULL) ? "NULL" : t->words[0]),
+ ((t->words == NULL) ? "NULL" : t->words[1])));
+ DBGPRINTF9(("FORKEXEC: wp is %s, wp[1] is %s\n",
+ ((wp == NULL) ? "NULL" : wp[0]),
+ ((wp == NULL) ? "NULL" : wp[1])));
+#endif
+
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)
+ } else if (cp != NULL) {
shcom = inbuilt(cp);
+ }
}
+
t->words = wp;
f = act;
- if (shcom == NULL && (f & FEXEC) == 0) {
+#if 0
+ DBGPRINTF3(("FORKEXEC: t->words is %s, t->words[1] is %s\n",
+ ((t->words == NULL) ? "NULL" : t->words[0]),
+ ((t->words == NULL) ? "NULL" : t->words[1])));
+#endif
+ 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 */
hpin = pin;
hpout = pout;
- hforked = *pforked;
hwp = *wp;
hinteractive = interactive;
hintr = intr;
hbrklist = brklist;
hexecflg = execflg;
- i = vfork();
- if (i != 0) {
- /* who wrote this crappy non vfork safe shit? */
+ DBGPRINTF3(("FORKEXEC: calling vfork()...\n"));
+
+ newpid = vfork();
+
+ if (newpid == -1) {
+ DBGPRINTF(("FORKEXEC: ERROR, unable to vfork()!\n"));
+ return (-1);
+ }
+
+
+ if (newpid > 0) { /* Parent */
+
+ /* Restore values */
pin = hpin;
pout = hpout;
- *pforked = hforked;
*wp = hwp;
interactive = hinteractive;
intr = hintr;
brklist = hbrklist;
execflg = hexecflg;
- *pforked = 0;
+/* moved up
if (i == -1)
- return (rv);
+ return(rv);
+*/
+
if (pin != NULL)
closepipe(pin);
- return (pout == NULL ? setstatus(waitfor(i, 0)) : 0);
+
+ 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));
+
if (interactive) {
signal(SIGINT, SIG_IGN);
signal(SIGQUIT, SIG_IGN);
}
interactive = 0;
intr = 0;
- (*pforked)++;
+ forked = 1;
brklist = 0;
execflg = 0;
}
+
+
if (owp != NULL)
while ((cp = *owp++) != NULL && assign(cp, COPYV))
if (shcom == NULL)
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);
dup2(pout[1], 1);
closepipe(pout);
}
+
if ((iopp = t->ioact) != NULL) {
if (shcom != NULL && shcom != doexec) {
prs(cp);
err(": cannot redirect shell command");
+ if (forked)
+ _exit(-1);
return (-1);
}
while (*iopp)
- if (iosetup(*iopp++, pin != NULL, pout != NULL))
+ if (iosetup(*iopp++, pin != NULL, pout != NULL)) {
+ if (forked)
+ _exit(rv);
return (rv);
+ }
}
- if (shcom)
- return (setstatus((*shcom) (t)));
+
+ if (shcom) {
+ i = setstatus((*shcom) (t));
+ if (forked)
+ _exit(i);
+ DBGPRINTF(("FORKEXEC: returning i=%d\n", i));
+ return (i);
+ }
+
/* should use FIOCEXCL */
for (i = FDBASE; i < NOFILE; i++)
close(i);
if (resetsig) {
signal(SIGINT, SIG_DFL);
signal(SIGQUIT, SIG_DFL);
+ } else {
+ /* put non-interactive processes into a different process group.
+ * we don't support jobs, but this is at least sane: see Bug 659 */
+ bb_setpgrp;
}
+
if (t->type == TPAREN)
- exit(execute(t->left, NOPIPE, NOPIPE, FEXEC));
+ _exit(execute(t->left, NOPIPE, NOPIPE, FEXEC));
if (wp[0] == NULL)
- exit(0);
+ _exit(0);
- cp = rexecve(wp[0], wp, makenv());
+ cp = rexecve(wp[0], wp, makenv(0, NULL));
prs(wp[0]);
prs(": ");
- warn(cp);
+ err(cp);
if (!execflg)
trap[0] = NULL;
+
+ DBGPRINTF(("FORKEXEC: calling leave(), pid=%d\n", newpid));
+
leave();
/* NOTREACHED */
- exit(1);
+ _exit(1);
}
/*
* within pipelines.
*/
static int iosetup(iop, pipein, pipeout)
-register struct ioword *iop;
+REGISTER struct ioword *iop;
int pipein, pipeout;
{
- register int u = -1;
+ REGISTER int u = -1;
char *cp = NULL, *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 (pipein && iop->io_unit == 0)
return (0);
+
if (pipeout && iop->io_unit == 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);
}
+
if (iop->io_flag & IODUP) {
if (cp[1] || (!isdigit(*cp) && *cp != '-')) {
prs(cp);
}
static void echo(wp)
-register char **wp;
+REGISTER char **wp;
{
- register int i;
+ REGISTER int i;
prs("+");
for (i = 0; wp[i]; i++) {
struct op *t;
char *w;
{
- register struct op *t1;
+ REGISTER struct op *t1;
struct op **tp;
- register char **wp, *cp;
+ REGISTER char **wp, *cp;
+
- if (t == NULL)
+ if (t == NULL) {
+ DBGPRINTF3(("FIND1CASE: enter, t==NULL, returning.\n"));
return ((struct op **) NULL);
+ }
+
+ 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)
+ 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))
+ 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);
}
struct op *t;
char *w;
{
- register struct op **tp;
+ REGISTER struct op **tp;
return ((tp = find1case(t, w)) != NULL ? *tp : (struct op *) NULL);
}
* unless `canintr' is true.
*/
static int waitfor(lastpid, canintr)
-register int lastpid;
+REGISTER int lastpid;
int canintr;
{
- register int pid, rv;
+ REGISTER int pid, rv;
int s;
int oheedint = heedint;
}
static int setstatus(s)
-register int s;
+REGISTER int s;
{
exstat = s;
setval(lookup("?"), putn(s));
static char *rexecve(c, v, envp)
char *c, **v, **envp;
{
- register int i;
- register char *sp, *tp;
+ REGISTER int i;
+ REGISTER char *sp, *tp;
int eacces = 0, asis = 0;
#ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL
}
#endif
+ DBGPRINTF(("REXECVE: c=%p, v=%p, envp=%p\n", c, v, envp));
+
sp = any('/', c) ? "" : path->value;
asis = *sp == '\0';
while (asis || *sp != '\0') {
*tp++ = '/';
for (i = 0; (*tp++ = c[i++]) != '\0';);
+ DBGPRINTF3(("REXECVE: e.linep is %s\n", e.linep));
+
execve(e.linep, v, envp);
+
switch (errno) {
case ENOEXEC:
*v = e.linep;
(void) &rv;
#endif
+ DBGPRINTF(("RUN: enter, areanum %d, outtree %p, failpt %p\n",
+ areanum, outtree, failpt));
+
areanum++;
swdlist = wdlist;
siolist = iolist;
otree = outtree;
ofail = failpt;
rv = -1;
+
if (newenv(setjmp(errpt = ev)) == 0) {
wdlist = 0;
iolist = 0;
if (setjmp(failpt = rt) == 0 && yyparse() == 0)
rv = execute(outtree, NOPIPE, NOPIPE, 0);
quitenv();
+ } else {
+ DBGPRINTF(("RUN: error from newenv()!\n"));
}
+
wdlist = swdlist;
iolist = siolist;
failpt = ofail;
outtree = otree;
freearea(areanum--);
+
return (rv);
}
}
static int dochdir(t)
-register struct op *t;
+REGISTER struct op *t;
{
- register char *cp, *er;
+ REGISTER char *cp, *er;
if ((cp = t->words[1]) == NULL && (cp = homedir->value) == NULL)
er = ": no home directory";
}
static int doshift(t)
-register struct op *t;
+REGISTER struct op *t;
{
- register int n;
+ REGISTER int n;
n = t->words[1] ? getn(t->words[1]) : 1;
if (dolc < n) {
static int dologin(t)
struct op *t;
{
- register char *cp;
+ REGISTER char *cp;
if (interactive) {
signal(SIGINT, SIG_DFL);
signal(SIGQUIT, SIG_DFL);
}
- cp = rexecve(t->words[0], t->words, makenv());
+ cp = rexecve(t->words[0], t->words, makenv(0, NULL));
prs(t->words[0]);
prs(": ");
err(cp);
}
static int doumask(t)
-register struct op *t;
+REGISTER struct op *t;
{
- register int i, n;
- register char *cp;
+ REGISTER int i, n;
+ REGISTER char *cp;
if ((cp = t->words[1]) == NULL) {
i = umask(0);
}
static int doexec(t)
-register struct op *t;
+REGISTER struct op *t;
{
- register int i;
+ REGISTER int i;
jmp_buf ex;
xint *ofail;
static int dodot(t)
struct op *t;
{
- register int i;
- register char *sp, *tp;
+ REGISTER int i;
+ REGISTER char *sp, *tp;
char *cp;
+ int maltmp;
- if ((cp = t->words[1]) == NULL)
+ 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)));
+
+ if ((cp = t->words[1]) == NULL) {
+ DBGPRINTF(("DODOT: bad args, ret 0\n"));
return (0);
+ } else {
+ DBGPRINTF(("DODOT: cp is %s\n", cp));
+ }
+
sp = any('/', cp) ? ":" : path->value;
+
+ DBGPRINTF(("DODOT: sp is %s, e.linep is %s\n",
+ ((sp == NULL) ? "NULL" : sp),
+ ((e.linep == NULL) ? "NULL" : e.linep)));
+
while (*sp) {
tp = e.linep;
while (*sp && (*tp = *sp++) != ':')
tp++;
if (tp != e.linep)
*tp++ = '/';
+
for (i = 0; (*tp++ = cp[i++]) != '\0';);
+
+ /* Original code */
if ((i = open(e.linep, 0)) >= 0) {
exstat = 0;
- next(remap(i));
+ 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));
+
+ next(maltmp); /* Basically a PUSHIO */
+
+ DBGPRINTF(("DODOT: returning exstat=%d\n", exstat));
+
return (exstat);
}
- }
+
+ } /* While */
+
prs(cp);
err(": not found");
+
return (-1);
}
static int dowait(t)
struct op *t;
{
- register int i;
- register char *cp;
+ REGISTER int i;
+ REGISTER char *cp;
if ((cp = t->words[1]) != NULL) {
i = getn(cp);
static int doread(t)
struct op *t;
{
- register char *cp, **wp;
- register int nb = 0;
- register int nl = 0;
+ REGISTER char *cp, **wp;
+ REGISTER int nb = 0;
+ REGISTER int nl = 0;
if (t->words[1] == NULL) {
err("Usage: read name ...");
}
static int doeval(t)
-register struct op *t;
+REGISTER struct op *t;
{
return (RUN(awordlist, t->words + 1, wdchar));
}
static int dotrap(t)
-register struct op *t;
+REGISTER struct op *t;
{
- register int n, i;
- register int resetsig;
+ REGISTER int n, i;
+ REGISTER int resetsig;
if (t->words[1] == NULL) {
for (i = 0; i <= _NSIG; i++)
static int getsig(s)
char *s;
{
- register int n;
+ REGISTER int n;
if ((n = getn(s)) < 0 || n > _NSIG) {
err("trap: bad signal number");
return (n);
}
-static void setsig(register int n, sighandler_t f)
+static void setsig(REGISTER int n, sighandler_t f)
{
if (n == 0)
return;
static int getn(as)
char *as;
{
- register char *s;
- register int n, m;
+ REGISTER char *s;
+ REGISTER int n, m;
s = as;
m = 1;
}
static int brkcontin(cp, val)
-register char *cp;
+REGISTER char *cp;
int val;
{
- register struct brkcon *bc;
- register int nl;
+ REGISTER struct brkcon *bc;
+ REGISTER int nl;
nl = cp == NULL ? 1 : getn(cp);
if (nl <= 0)
static int doexit(t)
struct op *t;
{
- register char *cp;
+ REGISTER char *cp;
execflg = 0;
if ((cp = t->words[1]) != NULL)
setstatus(getn(cp));
+
+ DBGPRINTF(("DOEXIT: calling leave(), t=%p\n", t));
+
leave();
/* NOTREACHED */
return (0);
static void rdexp(char **wp, void (*f) (struct var *), int key)
{
+ DBGPRINTF6(("RDEXP: enter, wp=%p, func=%p, key=%d\n", wp, f, key));
+ DBGPRINTF6(("RDEXP: *wp=%s\n", *wp));
+
if (*wp != NULL) {
for (; *wp != NULL; wp++) {
if (isassign(*wp)) {
}
static void badid(s)
-register char *s;
+REGISTER char *s;
{
prs(s);
err(": bad identifier");
}
static int doset(t)
-register struct op *t;
+REGISTER struct op *t;
{
- register struct var *vp;
- register char *cp;
- register int n;
+ REGISTER struct var *vp;
+ REGISTER char *cp;
+ REGISTER int n;
if ((cp = t->words[1]) == NULL) {
for (vp = vlist; vp; vp = vp->next)
}
static void varput(s, out)
-register char *s;
+REGISTER char *s;
int out;
{
if (isalnum(*s) || *s == '_') {
(void) ℘
(void) ≈
#endif
+
+ DBGPRINTF4(("EVAL: enter, f=%d\n", f));
+
wp = NULL;
wb = NULL;
wf = NULL;
quitenv();
} else
gflg = 1;
+
return (gflg ? (char **) NULL : wp);
}
* names in the dictionary. Keyword assignments
* will already have been done.
*/
-static char **makenv()
+static char **makenv(int all, struct wdblock *wb)
{
- register struct wdblock *wb;
- register struct var *vp;
+ REGISTER struct var *vp;
+
+ DBGPRINTF5(("MAKENV: enter, all=%d\n", all));
- wb = NULL;
for (vp = vlist; vp; vp = vp->next)
- if (vp->status & EXPORT)
+ if (all || vp->status & EXPORT)
wb = addword(vp->name, wb);
wb = addword((char *) 0, wb);
return (getwords(wb));
}
static char *evalstr(cp, f)
-register char *cp;
+REGISTER 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
return (cp);
}
-static int expand(char *cp, register struct wdblock **wbp, int f)
+static int expand(char *cp, REGISTER struct wdblock **wbp, int f)
{
jmp_buf ev;
/* Avoid longjmp clobbering */
(void) &cp;
#endif
+
+ DBGPRINTF3(("EXPAND: enter, f=%d\n", f));
+
gflg = 0;
+
if (cp == NULL)
return (0);
+
if (!anys("$`'\"", cp) &&
!anys(ifs->value, cp) && ((f & DOGLOB) == 0 || !anys("[*?", cp))) {
cp = strsave(cp, areanum);
static char *blank(f)
int f;
{
- register int c, c1;
- register char *sp;
+ REGISTER int c, c1;
+ REGISTER char *sp;
int scanequals, foundequals;
+ DBGPRINTF3(("BLANK: enter, f=%d\n", f));
+
sp = e.linep;
scanequals = f & DOKEY;
foundequals = 0;
* Get characters, substituting for ` and $
*/
static int subgetc(ec, quoted)
-register char ec;
+REGISTER char ec;
int quoted;
{
- register char c;
+ REGISTER char c;
+
+ DBGPRINTF3(("SUBGETC: enter, quoted=%d\n", quoted));
again:
c = my_getc(ec);
int otask;
struct io *oiop;
char *dolp;
- register char *s, c, *cp = NULL;
+ REGISTER char *s, c, *cp = NULL;
struct var *vp;
+ DBGPRINTF3(("DOLLAR: enter, quoted=%d\n", quoted));
+
c = readc();
s = e.linep;
if (c != '{') {
} else {
oiop = e.iop;
otask = e.iop->task;
+
e.iop->task = XOTHER;
while ((c = subgetc('"', 0)) != 0 && c != '}' && c != '\n')
if (e.linep < elinep)
int quoted;
{
char *cp;
- register int i;
+ REGISTER int i;
int j;
int pf[2];
static char child_cmd[LINELIM];
int ignore;
int ignore_once;
char *argument_list[4];
+ struct wdblock *wb = NULL;
#if __GNUC__
/* Avoid longjmp clobbering */
}
var_name[var_index++] = *src++;
- while (isalnum(*src))
+ while (isalnum(*src) || *src=='_')
var_name[var_index++] = *src++;
var_name[var_index] = 0;
src++;
}
- vp = lookup(var_name);
- if (vp->value != null)
- value = (operator == '+') ? alt_value : vp->value;
- else if (operator == '?') {
- err(alt_value);
- return (0);
- } else if (alt_index && (operator != '+')) {
- value = alt_value;
- if (operator == '=')
- setval(vp, value);
- } else
- continue;
+ if (isalpha(*var_name)) {
+ /* let subshell handle it instead */
+
+ char *namep = var_name;
- while (*value && (count < LINELIM)) {
- *dest++ = *value++;
- count++;
+ *dest++ = '$';
+ if (braces)
+ *dest++ = '{';
+ while (*namep)
+ *dest++ = *namep++;
+ if (operator) {
+ char *altp = alt_value;
+ *dest++ = operator;
+ while (*altp)
+ *dest++ = *altp++;
+ }
+ if (braces)
+ *dest++ = '}';
+
+ wb = addword(lookup(var_name)->name, wb);
+ } else {
+ /* expand */
+
+ vp = lookup(var_name);
+ if (vp->value != null)
+ value = (operator == '+') ?
+ alt_value : vp->value;
+ else if (operator == '?') {
+ err(alt_value);
+ return (0);
+ } else if (alt_index && (operator != '+')) {
+ value = alt_value;
+ if (operator == '=')
+ setval(vp, value);
+ } else
+ continue;
+
+ while (*value && (count < LINELIM)) {
+ *dest++ = *value++;
+ count++;
+ }
}
} else {
*dest++ = *src++;
if (openpipe(pf) < 0)
return (0);
+
while ((i = vfork()) == -1 && errno == EAGAIN);
+
+ DBGPRINTF3(("GRAVE: i is %p\n", io));
+
if (i < 0) {
closepipe(pf);
err((char *) bb_msg_memory_exhausted);
argument_list[2] = child_cmd;
argument_list[3] = 0;
- prs(rexecve(argument_list[0], argument_list, makenv()));
+ cp = rexecve(argument_list[0], argument_list, makenv(1, wb));
+ prs(argument_list[0]);
+ prs(": ");
+ err(cp);
_exit(1);
}
static char *unquote(as)
-register char *as;
+REGISTER char *as;
{
- register char *s;
+ REGISTER char *s;
if ((s = as) != NULL)
while (*s)
char *cp;
struct wdblock *wb;
{
- register int i;
- register char *pp;
+ REGISTER int i;
+ REGISTER char *pp;
if (cp == 0)
return (wb);
static void globname(we, pp)
char *we;
-register char *pp;
+REGISTER char *pp;
{
- register char *np, *cp;
+ REGISTER char *np, *cp;
char *name, *gp, *dp;
int k;
DIR *dirp;
*/
static char *generate(start1, end1, middle, end)
char *start1;
-register char *end1;
+REGISTER char *end1;
char *middle, *end;
{
char *p;
- register char *op, *xp;
+ REGISTER char *op, *xp;
p = op =
space((int) (end1 - start1) + strlen(middle) + strlen(end) + 2);
}
static int anyspcl(wb)
-register struct wdblock *wb;
+REGISTER struct wdblock *wb;
{
- register int i;
- register char **wd;
+ REGISTER int i;
+ REGISTER char **wd;
wd = wb->w_words;
for (i = 0; i < wb->w_nword; i++)
/* -------- word.c -------- */
static struct wdblock *newword(nw)
-register int nw;
+REGISTER int nw;
{
- register struct wdblock *wb;
+ REGISTER struct wdblock *wb;
wb = (struct wdblock *) space(sizeof(*wb) + nw * sizeof(char *));
wb->w_bsize = nw;
static struct wdblock *addword(wd, wb)
char *wd;
-register struct wdblock *wb;
+REGISTER struct wdblock *wb;
{
- register struct wdblock *wb2;
- register int nw;
+ REGISTER struct wdblock *wb2;
+ REGISTER int nw;
if (wb == NULL)
wb = newword(NSTART);
static
char **getwords(wb)
-register struct wdblock *wb;
+REGISTER struct wdblock *wb;
{
- register char **wd;
- register int nb;
+ REGISTER char **wd;
+ REGISTER int nb;
if (wb == NULL)
return ((char **) NULL);
return (wd);
}
-int (*func) (char *, char *);
-int globv;
+static int (*func) (char *, char *);
+static int globv;
static void glob0(a0, a1, a2, a3)
char *a0;
static void glob1(base, lim)
char *base, *lim;
{
- register char *i, *j;
+ REGISTER char *i, *j;
int v2;
char *lptr, *hptr;
int c;
static void glob2(i, j)
char *i, *j;
{
- register char *index1, *index2, c;
+ REGISTER char *index1, *index2, c;
int m;
m = globv;
static void glob3(i, j, k)
char *i, *j, *k;
{
- register char *index1, *index2, *index3;
+ REGISTER char *index1, *index2, *index3;
int c;
int m;
static int my_getc(int ec)
{
- register int c;
+ REGISTER int c;
if (e.linep > elinep) {
while ((c = readc()) != '\n' && c);
static int readc()
{
- register int c;
+ REGISTER int c;
- for (; e.iop >= e.iobase; e.iop--)
+ RCPRINTF(("READC: e.iop %p, e.iobase %p\n", e.iop, e.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);
}
}
if (e.iop->task == XIO) {
- if (multiline)
+ if (multiline) {
return e.iop->prev = 0;
+ }
if (interactive && e.iop == iostack + 1) {
#ifdef CONFIG_FEATURE_COMMAND_EDITING
current_prompt = prompt->value;
}
}
}
- if (e.iop >= iostack)
+
+ } /* FOR */
+
+ if (e.iop >= iostack) {
+ RCPRINTF(("READC: return 0, e.iop %p\n", e.iop));
return (0);
+ }
+
+ DBGPRINTF(("READC: leave()...\n"));
leave();
+
/* NOTREACHED */
return (0);
}
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));
+
+ /* Set env ptr for io source to next array spot and check for array overflow */
if (++e.iop >= &iostack[NPUSH]) {
e.iop--;
err("Shell input nested too deeply");
gflg++;
return;
}
- e.iop->iofn = (int (*)(struct ioarg *, struct io *)) fn;
+
+ /* 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 */
if (argp->afid != AFID_NOBUF)
e.iop->argp = argp;
else {
- e.iop->argp = ioargstack + (e.iop - iostack);
- *e.iop->argp = *argp;
- e.iop->argp->afbuf = e.iop == &iostack[0] ? &mainbuf : &sharedbuf;
- if (isatty(e.iop->argp->afile) == 0 &&
- (e.iop == &iostack[0] ||
- lseek(e.iop->argp->afile, 0L, 1) != -1)) {
- if (++bufid == AFID_NOBUF)
- bufid = AFID_ID;
- e.iop->argp->afid = bufid;
+
+ e.iop->argp = ioargstack + (e.iop - iostack); /* MAL - index into stack */
+ *e.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;
+ else
+ e.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 (++bufid == AFID_NOBUF) /* counter rollover check, AFID_NOBUF = 11111111 */
+ bufid = AFID_ID; /* AFID_ID = 0 */
+
+ e.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));
+
}
e.iop->prev = ~'\n';
e.iop->peekc = 0;
e.iop->xchar = 0;
e.iop->nlcount = 0;
+
if (fn == filechar || fn == linechar)
e.iop->task = XIO;
else if (fn == (int (*)(struct ioarg *)) gravechar
e.iop->task = XGRAVE;
else
e.iop->task = XOTHER;
+
+ return;
}
static struct io *setbase(ip)
struct io *ip;
{
- register struct io *xp;
+ REGISTER struct io *xp;
xp = e.iobase;
e.iobase = ip;
* Produce the characters of a string, then a newline, then EOF.
*/
static int nlchar(ap)
-register struct ioarg *ap;
+REGISTER struct ioarg *ap;
{
- register int c;
+ REGISTER int c;
if (ap->aword == NULL)
return (0);
* in them, with a space after each word.
*/
static int wdchar(ap)
-register struct ioarg *ap;
+REGISTER struct ioarg *ap;
{
- register char c;
- register char **wl;
+ REGISTER char c;
+ REGISTER char **wl;
if ((wl = ap->awordlist) == NULL)
return (0);
* producing a space between them.
*/
static int dolchar(ap)
-register struct ioarg *ap;
+REGISTER struct ioarg *ap;
{
- register char *wp;
+ REGISTER char *wp;
if ((wp = *ap->awordlist++) != NULL) {
PUSHIO(aword, wp, *ap->awordlist == NULL ? strchar : xxchar);
}
static int xxchar(ap)
-register struct ioarg *ap;
+REGISTER struct ioarg *ap;
{
- register int c;
+ REGISTER int c;
if (ap->aword == NULL)
return (0);
* Produce the characters from a single word (string).
*/
static int strchar(ap)
-register struct ioarg *ap;
+REGISTER struct ioarg *ap;
{
- register int c;
+ REGISTER int c;
if (ap->aword == NULL || (c = *ap->aword++) == 0)
return (0);
* Produce quoted characters from a single word (string).
*/
static int qstrchar(ap)
-register struct ioarg *ap;
+REGISTER struct ioarg *ap;
{
- register int c;
+ REGISTER int c;
if (ap->aword == NULL || (c = *ap->aword++) == 0)
return (0);
* Return the characters from a file.
*/
static int filechar(ap)
-register struct ioarg *ap;
+REGISTER struct ioarg *ap;
{
- register int i;
+ REGISTER int i;
char c;
struct iobuf *bp = ap->afbuf;
if (ap->afid != AFID_NOBUF) {
if ((i = ap->afid != bp->id) || bp->bufp == bp->ebufp) {
+
if (i)
lseek(ap->afile, ap->afpos, 0);
+
i = 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;
}
+
ap->afpos++;
return *bp->bufp++ & 0177;
}
return (c);
} else
#endif
+
{
i = safe_read(ap->afile, &c, sizeof(c));
- return (i == sizeof(c) ? c & 0177 : (closef(ap->afile), 0));
+ return (i == sizeof(c) ? (c & 0x7f) : (closef(ap->afile), 0));
}
}
* Return the characters from a here temp file.
*/
static int herechar(ap)
-register struct ioarg *ap;
+REGISTER struct ioarg *ap;
{
char c;
struct ioarg *ap;
struct io *iop;
{
- register int c;
+ REGISTER int c;
if ((c = qgravechar(ap, iop) & ~QUOTE) == '\n')
c = ' ';
}
static int qgravechar(ap, iop)
-register struct ioarg *ap;
+REGISTER struct ioarg *ap;
struct io *iop;
{
- register int c;
+ REGISTER int c;
+
+ DBGPRINTF3(("QGRAVECHAR: enter, ap=%p, iop=%p\n", ap, iop));
if (iop->xchar) {
if (iop->nlcount) {
* Return a single command (usually the first line) from a file.
*/
static int linechar(ap)
-register struct ioarg *ap;
+REGISTER struct ioarg *ap;
{
- register int c;
+ REGISTER int c;
if ((c = filechar(ap)) == '\n') {
if (!multiline) {
}
static void prs(s)
-register char *s;
+REGISTER const char *s;
{
if (*s)
write(2, s, strlen(s));
}
static void closef(i)
-register int i;
+REGISTER int i;
{
if (i > 2)
close(i);
static void closeall()
{
- register int u;
+ REGISTER int u;
for (u = NUFILE; u < NOFILE;)
close(u++);
}
+
/*
* remap fd into Shell's fd space
*/
static int remap(fd)
-register int fd;
+REGISTER int fd;
{
- register int i;
+ REGISTER int i;
int map[NOFILE];
+ int newfd;
+
+
+ DBGPRINTF(("REMAP: fd=%d, e.iofd=%d\n", fd, e.iofd));
if (fd < e.iofd) {
for (i = 0; i < NOFILE; i++)
map[i] = 0;
+
do {
map[fd] = 1;
- fd = dup(fd);
+ newfd = dup(fd);
+ fd = newfd;
} while (fd >= 0 && fd < e.iofd);
+
for (i = 0; i < NOFILE; i++)
if (map[i])
close(i);
+
if (fd < 0)
err("too many files open in shell");
}
+
return (fd);
}
static int openpipe(pv)
-register int *pv;
+REGISTER int *pv;
{
- register int i;
+ REGISTER int i;
if ((i = pipe(pv)) < 0)
err("can't create pipe - try again");
}
static void closepipe(pv)
-register int *pv;
+REGISTER int *pv;
{
if (pv != NULL) {
close(*pv++);
*/
static void markhere(s, iop)
-register char *s;
+REGISTER char *s;
struct ioword *iop;
{
- register struct here *h, *lh;
+ REGISTER struct here *h, *lh;
+
+ DBGPRINTF7(("MARKHERE: enter, s=%p\n", s));
h = (struct here *) space(sizeof(struct here));
if (h == 0)
return;
+
h->h_tag = evalstr(s, DOSUB);
if (h->h_tag == 0)
return;
+
h->h_iop = iop;
iop->io_name = 0;
h->h_next = NULL;
static void gethere()
{
- register struct here *h, *hp;
+ REGISTER struct here *h, *hp;
+
+ DBGPRINTF7(("GETHERE: enter...\n"));
/* Scan here files first leaving inhere list in place */
for (hp = h = inhere; h != NULL; hp = h, h = h->h_next)
static void readhere(name, s, ec)
char **name;
-register char *s;
+REGISTER char *s;
int ec;
{
int tf;
char tname[30] = ".msh_XXXXXX";
- register int c;
+ REGISTER int c;
jmp_buf ev;
char myline[LINELIM + 1];
char *thenext;
+ DBGPRINTF7(("READHERE: enter, name=%p, s=%p\n", name, s));
+
tf = mkstemp(tname);
if (tf < 0)
return;
+
*name = strsave(tname, areanum);
if (newenv(setjmp(errpt = ev)) != 0)
unlink(tname);
char *hname;
int xdoll;
{
- register int hf;
+ REGISTER int hf;
int tf;
#if __GNUC__
/* Avoid longjmp clobbering */
(void) &tf;
#endif
- if (hname == 0)
+ if (hname == NULL)
return (-1);
+
+ DBGPRINTF7(("HEREIN: hname is %s, xdoll=%d\n", hname, xdoll));
+
hf = open(hname, 0);
if (hf < 0)
return (-1);
+
if (xdoll) {
char c;
char tname[30] = ".msh_XXXXXX";
static void scraphere()
{
- register struct here *h;
+ REGISTER struct here *h;
+
+ DBGPRINTF7(("SCRAPHERE: enter...\n"));
for (h = inhere; h != NULL; h = h->h_next) {
if (h->h_iop && h->h_iop->io_name)
static void freehere(area)
int area;
{
- register struct here *h, *hl;
+ REGISTER struct here *h, *hl;
+
+ DBGPRINTF6(("FREEHERE: enter, area=%d\n", area));
hl = NULL;
for (h = acthere; h != NULL; h = h->h_next)
projects / oweals / busybox.git / blobdiff