* maybe change map[] to use 2-bit entries
* (eventually) remove all the printf's
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
+
+#include "busybox.h"
#include <ctype.h> /* isalpha, isdigit */
#include <unistd.h> /* getpid */
#include <stdlib.h> /* getenv, atoi */
/* #include <dmalloc.h> */
/* #define DEBUG_SHELL */
-#if 1
-#include "busybox.h"
#include "cmdedit.h"
-#else
-#define bb_applet_name "hush"
-#include "standalone.h"
-#define hush_main main
-#undef CONFIG_FEATURE_SH_FANCY_PROMPT
-#define BB_BANNER
-#endif
+
#define SPECIAL_VAR_SYMBOL 03
#define FLAG_EXIT_FROM_LOOP 1
#define FLAG_PARSE_SEMICOLON (1 << 1) /* symbol ';' is special for parser */
/* The descrip member of this structure is only used to make debugging
* output pretty */
-struct {int mode; int default_fd; char *descrip;} redir_table[] = {
+static const struct {int mode; int default_fd; const char *descrip;} redir_table[] = {
{ 0, 0, "()" },
{ O_RDONLY, 0, "<" },
{ O_CREAT|O_TRUNC|O_WRONLY, 1, ">" },
/* globals, connect us to the outside world
* the first three support $?, $#, and $1 */
-char **global_argv;
-unsigned int global_argc;
-unsigned int last_return_code;
+static char **global_argv;
+static int global_argc;
+static int last_return_code;
extern char **environ; /* This is in <unistd.h>, but protected with __USE_GNU */
/* "globals" within this file */
static char *ifs;
-static char map[256];
+static unsigned char map[256];
static int fake_mode;
static int interactive;
static struct close_me *close_me_head;
static const char *cwd;
static struct pipe *job_list;
static unsigned int last_bg_pid;
-static unsigned int last_jobid;
+static int last_jobid;
static unsigned int shell_terminal;
static char *PS1;
static char *PS2;
-struct variables shell_ver = { "HUSH_VERSION", "0.01", 1, 1, 0 };
-struct variables *top_vars = &shell_ver;
+static struct variables shell_ver = { "HUSH_VERSION", "0.01", 1, 1, 0 };
+static struct variables *top_vars = &shell_ver;
#define B_CHUNK (100)
#define JOB_STATUS_FORMAT "[%d] %-22s %.40s\n"
struct built_in_command {
- char *cmd; /* name */
- char *descr; /* description */
+ const char *cmd; /* name */
+ const char *descr; /* description */
int (*function) (struct child_prog *); /* function ptr */
};
/* belongs in busybox.h */
-static inline int max(int a, int b) {
+static int max(int a, int b) {
return (a>b)?a:b;
}
vfprintf(stderr, format, args);
va_end(args);
}
+/* broken, of course, but OK for testing */
+static char *indenter(int i)
+{
+ static char blanks[]=" ";
+ return &blanks[sizeof(blanks)-i-1];
+}
#else
-static inline void debug_printf(const char *format, ...) { }
+#define debug_printf(...) do {;} while(0);
#endif
#define final_printf debug_printf
static void __syntax(char *file, int line) {
bb_error_msg("syntax error %s:%d", file, line);
}
-#define syntax() __syntax(__FILE__, __LINE__)
+// NB: was __FILE__, but that produces full path sometimess, so...
+#define syntax() __syntax("hush.c", __LINE__)
/* Index of subroutines: */
/* function prototypes for builtins */
static void mark_closed(int fd);
static void close_all(void);
/* "run" the final data structures: */
-static char *indenter(int i);
static int free_pipe_list(struct pipe *head, int indent);
static int free_pipe(struct pipe *pi, int indent);
/* really run the final data structures: */
static int setup_redirects(struct child_prog *prog, int squirrel[]);
static int run_list_real(struct pipe *pi);
-static void pseudo_exec(struct child_prog *child) __attribute__ ((noreturn));
+static void pseudo_exec(struct child_prog *child) ATTRIBUTE_NORETURN;
static int run_pipe_real(struct pipe *pi);
/* extended glob support: */
static int globhack(const char *src, int flags, glob_t *pglob);
/* Table of built-in functions. They can be forked or not, depending on
* context: within pipes, they fork. As simple commands, they do not.
* When used in non-forking context, they can change global variables
- * in the parent shell process. If forked, of course they can not.
+ * in the parent shell process. If forked, of course they cannot.
* For example, 'unset foo | whatever' will parse and run, but foo will
* still be set at the end. */
-static struct built_in_command bltins[] = {
+static const struct built_in_command bltins[] = {
{"bg", "Resume a job in the background", builtin_fg_bg},
{"break", "Exit for, while or until loop", builtin_not_written},
{"cd", "Change working directory", builtin_cd},
}
/* built-in 'env' handler */
-static int builtin_env(struct child_prog *dummy)
+static int builtin_env(struct child_prog *dummy ATTRIBUTE_UNUSED)
{
char **e = environ;
if (e == NULL) return EXIT_FAILURE;
char *name = child->argv[1];
if (name == NULL) {
- return (builtin_env(child));
+ return builtin_env(child);
}
name = strdup(name);
}
/* built-in 'help' handler */
-static int builtin_help(struct child_prog *dummy)
+static int builtin_help(struct child_prog *dummy ATTRIBUTE_UNUSED)
{
- struct built_in_command *x;
+ const struct built_in_command *x;
printf("\nBuilt-in commands:\n");
printf("-------------------\n");
}
/* built-in 'jobs' handler */
-static int builtin_jobs(struct child_prog *child)
+static int builtin_jobs(struct child_prog *child ATTRIBUTE_UNUSED)
{
struct pipe *job;
char *status_string;
/* built-in 'pwd' handler */
-static int builtin_pwd(struct child_prog *dummy)
+static int builtin_pwd(struct child_prog *dummy ATTRIBUTE_UNUSED)
{
puts(set_cwd());
return EXIT_SUCCESS;
} else
res = -1;
if (res)
- fprintf(stderr, "read: %m\n");
+ bb_perror_msg("read");
free(var); /* So not move up to avoid breaking errno */
return res;
} else {
/* XXX search through $PATH is missing */
input = fopen(child->argv[1], "r");
if (!input) {
- bb_error_msg("Couldn't open file '%s'", child->argv[1]);
+ bb_error_msg("cannot open '%s'", child->argv[1]);
return EXIT_FAILURE;
}
status = parse_file_outer(input);
mark_closed(fileno(input));
fclose(input);
- return (status);
+ return status;
}
static int builtin_umask(struct child_prog *child)
}
/* belongs in utility.c */
-char *simple_itoa(unsigned int i)
+static char *simple_itoa(unsigned int i)
{
/* 21 digits plus null terminator, good for 64-bit or smaller ints */
static char local[22];
return *i->p;
}
-static inline void cmdedit_set_initial_prompt(void)
+static void cmdedit_set_initial_prompt(void)
{
#ifndef CONFIG_FEATURE_SH_FANCY_PROMPT
PS1 = NULL;
#endif
}
-static inline void setup_prompt_string(int promptmode, char **prompt_str)
+static void setup_prompt_string(int promptmode, char **prompt_str)
{
debug_printf("setup_prompt_string %d ",promptmode);
#ifndef CONFIG_FEATURE_SH_FANCY_PROMPT
{
int i, rcode;
char *p;
- struct built_in_command *x;
+ const struct built_in_command *x;
if (child->argv) {
for (i=0; is_assignment(child->argv[i]); i++) {
debug_printf("pid %d environment modification: %s\n",getpid(),child->argv[i]);
#endif
debug_printf("exec of %s\n",child->argv[0]);
execvp(child->argv[0],child->argv);
- bb_perror_msg("couldn't exec: %s",child->argv[0]);
+ bb_perror_msg("cannot exec: %s",child->argv[0]);
_exit(1);
} else if (child->group) {
debug_printf("runtime nesting to group\n");
if (i==fg_pipe->num_progs-1)
rcode=WEXITSTATUS(status);
(fg_pipe->num_progs)--;
- return(rcode);
+ return rcode;
}
}
}
/* child stopped */
pi->stopped_progs++;
pi->progs[prognum].is_stopped = 1;
-
-#if 0
- /* Printing this stuff is a pain, since it tends to
- * overwrite the prompt an inconveinient moments. So
- * don't do that. */
- if (pi->stopped_progs == pi->num_progs) {
- printf("\n"JOB_STATUS_FORMAT, pi->jobid, "Stopped", pi->text);
- }
-#endif
}
}
return -1;
}
-/* Figure out our controlling tty, checking in order stderr,
- * stdin, and stdout. If check_pgrp is set, also check that
- * we belong to the foreground process group associated with
- * that tty. The value of shell_terminal is needed in order to call
- * tcsetpgrp(shell_terminal, ...); */
-void controlling_tty(int check_pgrp)
-{
- pid_t curpgrp;
-
- if ((curpgrp = tcgetpgrp(shell_terminal = 2)) < 0
- && (curpgrp = tcgetpgrp(shell_terminal = 0)) < 0
- && (curpgrp = tcgetpgrp(shell_terminal = 1)) < 0)
- goto shell_terminal_error;
-
- if (check_pgrp && curpgrp != getpgid(0))
- goto shell_terminal_error;
-
- return;
-
-shell_terminal_error:
- shell_terminal = -1;
- return;
-}
-
/* run_pipe_real() starts all the jobs, but doesn't wait for anything
* to finish. See checkjobs().
*
int nextin, nextout;
int pipefds[2]; /* pipefds[0] is for reading */
struct child_prog *child;
- struct built_in_command *x;
+ const struct built_in_command *x;
char *p;
nextin = 0;
* Builtins within pipes have to fork anyway, and are handled in
* pseudo_exec. "echo foo | read bar" doesn't work on bash, either.
*/
- if (pi->num_progs == 1) child = & (pi->progs[0]);
+ child = & (pi->progs[0]);
if (pi->num_progs == 1 && child->group && child->subshell == 0) {
int squirrel[] = {-1, -1, -1};
int rcode;
* variable. */
int export_me=0;
char *name, *value;
- name = bb_xstrdup(child->argv[i]);
+ name = xstrdup(child->argv[i]);
debug_printf("Local environment set: %s\n", name);
value = strchr(name, '=');
if (value)
if (rmode == RES_IN) continue;
if (rmode == RES_DO) {
if (!flag_rep) continue;
- }
+ }
if ((rmode == RES_DONE)) {
if (flag_rep) {
flag_restore = 1;
return rcode;
}
-/* broken, of course, but OK for testing */
-static char *indenter(int i)
-{
- static char blanks[]=" ";
- return &blanks[sizeof(blanks)-i-1];
-}
-
/* return code is the exit status of the pipe */
static int free_pipe(struct pipe *pi, int indent)
{
struct child_prog *child;
struct redir_struct *r, *rnext;
int a, i, ret_code=0;
- char *ind = indenter(indent);
if (pi->stopped_progs > 0)
return ret_code;
- final_printf("%s run pipe: (pid %d)\n",ind,getpid());
+ final_printf("%s run pipe: (pid %d)\n",indenter(indent),getpid());
for (i=0; i<pi->num_progs; i++) {
child = &pi->progs[i];
- final_printf("%s command %d:\n",ind,i);
+ final_printf("%s command %d:\n",indenter(indent),i);
if (child->argv) {
for (a=0,p=child->argv; *p; a++,p++) {
- final_printf("%s argv[%d] = %s\n",ind,a,*p);
+ final_printf("%s argv[%d] = %s\n",indenter(indent),a,*p);
}
globfree(&child->glob_result);
child->argv=NULL;
} else if (child->group) {
- final_printf("%s begin group (subshell:%d)\n",ind, child->subshell);
+ final_printf("%s begin group (subshell:%d)\n",indenter(indent), child->subshell);
ret_code = free_pipe_list(child->group,indent+3);
- final_printf("%s end group\n",ind);
+ final_printf("%s end group\n",indenter(indent));
} else {
- final_printf("%s (nil)\n",ind);
+ final_printf("%s (nil)\n",indenter(indent));
}
for (r=child->redirects; r; r=rnext) {
- final_printf("%s redirect %d%s", ind, r->fd, redir_table[r->type].descrip);
+ final_printf("%s redirect %d%s", indenter(indent), r->fd, redir_table[r->type].descrip);
if (r->dup == -1) {
/* guard against the case >$FOO, where foo is unset or blank */
if (r->word.gl_pathv) {
{
int rcode=0; /* if list has no members */
struct pipe *pi, *next;
- char *ind = indenter(indent);
for (pi=head; pi; pi=next) {
- final_printf("%s pipe reserved mode %d\n", ind, pi->r_mode);
+ final_printf("%s pipe reserved mode %d\n", indenter(indent), pi->r_mode);
rcode = free_pipe(pi, indent);
- final_printf("%s pipe followup code %d\n", ind, pi->followup);
+ final_printf("%s pipe followup code %d\n", indenter(indent), pi->followup);
next=pi->next;
pi->next=NULL;
free(pi);
return 0;
}
-#if 0
-static void globprint(glob_t *pglob)
-{
- int i;
- debug_printf("glob_t at %p:\n", pglob);
- debug_printf(" gl_pathc=%d gl_pathv=%p gl_offs=%d gl_flags=%d\n",
- pglob->gl_pathc, pglob->gl_pathv, pglob->gl_offs, pglob->gl_flags);
- for (i=0; i<pglob->gl_pathc; i++)
- debug_printf("pglob->gl_pathv[%d] = %p = %s\n", i,
- pglob->gl_pathv[i], pglob->gl_pathv[i]);
-}
-#endif
-
static int xglob(o_string *dest, int flags, glob_t *pglob)
{
int gr;
- /* short-circuit for null word */
+ /* short-circuit for null word */
/* we can code this better when the debug_printf's are gone */
- if (dest->length == 0) {
- if (dest->nonnull) {
- /* bash man page calls this an "explicit" null */
- gr = globhack(dest->data, flags, pglob);
- debug_printf("globhack returned %d\n",gr);
- } else {
+ if (dest->length == 0) {
+ if (dest->nonnull) {
+ /* bash man page calls this an "explicit" null */
+ gr = globhack(dest->data, flags, pglob);
+ debug_printf("globhack returned %d\n",gr);
+ } else {
return 0;
}
- } else if (glob_needed(dest->data)) {
+ } else if (glob_needed(dest->data)) {
gr = glob(dest->data, flags, NULL, pglob);
debug_printf("glob returned %d\n",gr);
if (gr == GLOB_NOMATCH) {
return 0;
}
-struct pipe *new_pipe(void) {
+static struct pipe *new_pipe(void) {
struct pipe *pi;
pi = xmalloc(sizeof(struct pipe));
pi->num_progs = 0;
pi->progs = NULL;
pi->next = NULL;
pi->followup = 0; /* invalid */
+ pi->r_mode = RES_NONE;
return pi;
}
* should handle if, then, elif, else, fi, for, while, until, do, done.
* case, function, and select are obnoxious, save those for later.
*/
-int reserved_word(o_string *dest, struct p_context *ctx)
+static int reserved_word(o_string *dest, struct p_context *ctx)
{
struct reserved_combo {
char *literal;
if (reserved_word(dest,ctx)) return ctx->w==RES_SNTX;
}
glob_target = &child->glob_result;
- if (child->argv) flags |= GLOB_APPEND;
+ if (child->argv) flags |= GLOB_APPEND;
}
gr = xglob(dest, flags, glob_target);
if (gr != 0) return 1;
return num;
}
-FILE *generate_stream_from_list(struct pipe *head)
+static FILE *generate_stream_from_list(struct pipe *head)
{
FILE *pf;
-#if 1
int pid, channel[2];
if (pipe(channel)<0) bb_perror_msg_and_die("pipe");
#if !defined(__UCLIBC__) || defined(__ARCH_HAS_MMU__)
dup2(channel[1],1);
close(channel[1]);
}
-#if 0
-#define SURROGATE "surrogate response"
- write(1,SURROGATE,sizeof(SURROGATE));
- _exit(run_list(head));
-#else
_exit(run_list_real(head)); /* leaks memory */
-#endif
}
debug_printf("forked child %d\n",pid);
close(channel[1]);
pf = fdopen(channel[0],"r");
debug_printf("pipe on FILE *%p\n",pf);
-#else
- free_pipe_list(head,0);
- pf=popen("echo surrogate response","r");
- debug_printf("started fake pipe on FILE *%p\n",pf);
-#endif
return pf;
}
return 1; /* syntax error, groups and arglists don't mix */
}
initialize_context(&sub);
- switch(ch) {
+ switch (ch) {
case '(': endch=')'; child->subshell=1; break;
case '{': endch='}'; break;
default: syntax(); /* really logic error */
int parse_stream(o_string *dest, struct p_context *ctx,
struct in_str *input, int end_trigger)
{
- unsigned int ch, m;
+ int ch, m;
int redir_fd;
redir_type redir_style;
int next;
debug_printf("leaving parse_stream (triggered)\n");
return 0;
}
-#if 0
- if (ch=='\n') {
- /* Yahoo! Time to run with it! */
- done_pipe(ctx,PIPE_SEQ);
- run_list(ctx->list_head);
- initialize_context(ctx);
- }
-#endif
if (m!=2) switch (ch) {
case '#':
if (dest->length == 0 && !dest->quote) {
return 0;
}
-void mapset(const unsigned char *set, int code)
+static void mapset(const char *set, int code)
{
const unsigned char *s;
- for (s=set; *s; s++) map[*s] = code;
+ for (s = (const unsigned char *)set; *s; s++) map[(int)*s] = code;
}
-void update_ifs_map(void)
+static void update_ifs_map(void)
{
/* char *ifs and char map[256] are both globals. */
ifs = getenv("IFS");
mapset(ifs, 2); /* also flow through if quoted */
}
-/* most recursion does not come through here, the exeception is
+/* most recursion does not come through here, the exception is
* from builtin_source() */
int parse_stream_outer(struct in_str *inp, int flag)
{
/* Initialize some more globals to non-zero values */
set_cwd();
-#ifdef CONFIG_FEATURE_COMMAND_EDITING
- cmdedit_set_initial_prompt();
-#else
- PS1 = NULL;
-#endif
+ if (ENABLE_FEATURE_COMMAND_EDITING) cmdedit_set_initial_prompt();
+ else PS1 = NULL;
PS2 = "> ";
/* initialize our shell local variables with the values
if (interactive) {
/* Looks like they want an interactive shell */
#ifndef CONFIG_FEATURE_SH_EXTRA_QUIET
- printf( "\n\n" BB_BANNER " hush - the humble shell v0.01 (testing)\n");
+ printf( "\n\n%s hush - the humble shell v0.01 (testing)\n",
+ BB_BANNER);
printf( "Enter 'help' for a list of built-in commands.\n\n");
#endif
setup_job_control();
debug_printf("\nrunning script '%s'\n", argv[optind]);
global_argv = argv+optind;
global_argc = argc-optind;
- input = bb_xfopen(argv[optind], "r");
+ input = xfopen(argv[optind], "r");
opt = parse_file_outer(input);
#ifdef CONFIG_FEATURE_CLEAN_UP
#endif
final_return:
- return(opt?opt:last_return_code);
+ return opt ? opt : last_return_code;
}
static char *insert_var_value(char *inp)
projects / oweals / busybox.git / blobdiff