* fancy forms of Parameter Expansion
* Arithmetic Expansion
* <(list) and >(list) Process Substitution
- * reserved words: if, then, elif, else, fi, while, until, for,
- * do, done, case
+ * reserved words: case, esac, function
* Here Documents ( << word )
* Functions
* Major bugs:
* job handling woefully incomplete and buggy
* reserved word execution woefully incomplete and buggy
- * incomplete reserved word sequence doesn't request more lines of input
* to-do:
* port selected bugfixes from post-0.49 busybox lash
* finish implementing reserved words
* more testing, especially quoting rules and redirection
* maybe change map[] to use 2-bit entries
* (eventually) remove all the printf's
- * more integration with BusyBox: prompts, cmdedit, applets
*
* 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
#include <signal.h>
/* #include <dmalloc.h> */
-/* #define DEBUG_SHELL */
+#define DEBUG_SHELL
#ifdef BB_VER
#include "busybox.h"
exit(x->function(child));
}
}
+
+ /* Check if the command matches any busybox internal commands
+ * ("applets") here.
+ * FIXME: This feature is not 100% safe, since
+ * BusyBox is not fully reentrant, so we have no guarantee the things
+ * from the .bss are still zeroed, or that things from .data are still
+ * at their defaults. We could exec ourself from /proc/self/exe, but I
+ * really dislike relying on /proc for things. We could exec ourself
+ * from global_argv[0], but if we are in a chroot, we may not be able
+ * to find ourself... */
+#ifdef BB_FEATURE_SH_STANDALONE_SHELL
+ {
+ int argc_l;
+ char** argv_l=child->argv;
+ char *name = child->argv[0];
+
+#ifdef BB_FEATURE_SH_APPLETS_ALWAYS_WIN
+ /* Following discussions from November 2000 on the busybox mailing
+ * list, the default configuration, (without
+ * get_last_path_component()) lets the user force use of an
+ * external command by specifying the full (with slashes) filename.
+ * If you enable BB_FEATURE_SH_APPLETS_ALWAYS_WIN, then applets
+ * _aways_ override external commands, so if you want to run
+ * /bin/cat, it will use BusyBox cat even if /bin/cat exists on the
+ * filesystem and is _not_ busybox. Some systems may want this,
+ * most do not. */
+ name = get_last_path_component(name);
+#endif
+ /* Count argc for use in a second... */
+ for(argc_l=0;*argv_l!=NULL; argv_l++, argc_l++);
+ optind = 1;
+ debug_printf("running applet %s\n", name);
+ run_applet_by_name(name, argc_l, child->argv);
+ exit(1);
+ }
+#endif
debug_printf("exec of %s\n",child->argv[0]);
execvp(child->argv[0],child->argv);
perror("execvp");
ch,ch,m,dest->quote);
if (m==0 || ((m==1 || m==2) && dest->quote)) {
b_addqchr(dest, ch, dest->quote);
- } else if (ch == end_trigger && !dest->quote && ctx->w==RES_NONE) {
- debug_printf("leaving parse_stream\n");
- return 0;
- } else if (m==2 && !dest->quote) { /* IFS */
- done_word(dest, ctx);
- if (ch=='\n') done_pipe(ctx,PIPE_SEQ);
+ } else {
+ if (m==2) { /* unquoted IFS */
+ done_word(dest, ctx);
+ if (ch=='\n') done_pipe(ctx,PIPE_SEQ);
+ }
if (ch == end_trigger && !dest->quote && ctx->w==RES_NONE) {
- debug_printf("leaving parse_stream (stupid duplication)\n");
+ debug_printf("leaving parse_stream\n");
return 0;
}
#if 0
initialize_context(ctx);
}
#endif
- } else switch (ch) {
+ if (m!=2) switch (ch) {
case '#':
if (dest->length == 0 && !dest->quote) {
while(ch=b_peek(input),ch!=EOF && ch!='\n') { b_getch(input); }
default:
syntax(); /* this is really an internal logic error */
return 1;
+ }
}
}
/* complain if quote? No, maybe we just finished a command substitution
* fancy forms of Parameter Expansion
* Arithmetic Expansion
* <(list) and >(list) Process Substitution
- * reserved words: if, then, elif, else, fi, while, until, for,
- * do, done, case
+ * reserved words: case, esac, function
* Here Documents ( << word )
* Functions
* Major bugs:
* job handling woefully incomplete and buggy
* reserved word execution woefully incomplete and buggy
- * incomplete reserved word sequence doesn't request more lines of input
* to-do:
* port selected bugfixes from post-0.49 busybox lash
* finish implementing reserved words
* more testing, especially quoting rules and redirection
* maybe change map[] to use 2-bit entries
* (eventually) remove all the printf's
- * more integration with BusyBox: prompts, cmdedit, applets
*
* 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
#include <signal.h>
/* #include <dmalloc.h> */
-/* #define DEBUG_SHELL */
+#define DEBUG_SHELL
#ifdef BB_VER
#include "busybox.h"
exit(x->function(child));
}
}
+
+ /* Check if the command matches any busybox internal commands
+ * ("applets") here.
+ * FIXME: This feature is not 100% safe, since
+ * BusyBox is not fully reentrant, so we have no guarantee the things
+ * from the .bss are still zeroed, or that things from .data are still
+ * at their defaults. We could exec ourself from /proc/self/exe, but I
+ * really dislike relying on /proc for things. We could exec ourself
+ * from global_argv[0], but if we are in a chroot, we may not be able
+ * to find ourself... */
+#ifdef BB_FEATURE_SH_STANDALONE_SHELL
+ {
+ int argc_l;
+ char** argv_l=child->argv;
+ char *name = child->argv[0];
+
+#ifdef BB_FEATURE_SH_APPLETS_ALWAYS_WIN
+ /* Following discussions from November 2000 on the busybox mailing
+ * list, the default configuration, (without
+ * get_last_path_component()) lets the user force use of an
+ * external command by specifying the full (with slashes) filename.
+ * If you enable BB_FEATURE_SH_APPLETS_ALWAYS_WIN, then applets
+ * _aways_ override external commands, so if you want to run
+ * /bin/cat, it will use BusyBox cat even if /bin/cat exists on the
+ * filesystem and is _not_ busybox. Some systems may want this,
+ * most do not. */
+ name = get_last_path_component(name);
+#endif
+ /* Count argc for use in a second... */
+ for(argc_l=0;*argv_l!=NULL; argv_l++, argc_l++);
+ optind = 1;
+ debug_printf("running applet %s\n", name);
+ run_applet_by_name(name, argc_l, child->argv);
+ exit(1);
+ }
+#endif
debug_printf("exec of %s\n",child->argv[0]);
execvp(child->argv[0],child->argv);
perror("execvp");
ch,ch,m,dest->quote);
if (m==0 || ((m==1 || m==2) && dest->quote)) {
b_addqchr(dest, ch, dest->quote);
- } else if (ch == end_trigger && !dest->quote && ctx->w==RES_NONE) {
- debug_printf("leaving parse_stream\n");
- return 0;
- } else if (m==2 && !dest->quote) { /* IFS */
- done_word(dest, ctx);
- if (ch=='\n') done_pipe(ctx,PIPE_SEQ);
+ } else {
+ if (m==2) { /* unquoted IFS */
+ done_word(dest, ctx);
+ if (ch=='\n') done_pipe(ctx,PIPE_SEQ);
+ }
if (ch == end_trigger && !dest->quote && ctx->w==RES_NONE) {
- debug_printf("leaving parse_stream (stupid duplication)\n");
+ debug_printf("leaving parse_stream\n");
return 0;
}
#if 0
initialize_context(ctx);
}
#endif
- } else switch (ch) {
+ if (m!=2) switch (ch) {
case '#':
if (dest->length == 0 && !dest->quote) {
while(ch=b_peek(input),ch!=EOF && ch!='\n') { b_getch(input); }
default:
syntax(); /* this is really an internal logic error */
return 1;
+ }
}
}
/* complain if quote? No, maybe we just finished a command substitution
projects / oweals / busybox.git / commitdiff