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which: -a support (needed for bfin uclibc build script)

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real support (with CONFIG_DESKTOP=y): 120+ bytes:
   text	   data	    bss	    dec	    hex	filename
 807958	    624	   7036	 815618	  c7202	busybox_old
 808085	    624	   7036	 815745	  c7281	busybox_unstripped

"fake" support (with CONFIG_DESKTOP unset): ~45 bytes:
   text	   data	    bss	    dec	    hex	filename
 797790	    611	   6996	 805397	  c4a15	busybox_old
 797834	    611	   6996	 805441	  c4a41	busybox_unstripped
This commit is contained in:
Denis Vlasenko
2008-06-05 13:33:59 +00:00
parent f0d6068086
commit f592aa36f3
3 changed files with 70 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

27
libbb/execable.c
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@ -19,15 +19,20 @@ int execable_file(const char *name)
return (!access(name, X_OK) && !stat(name, &s) && S_ISREG(s.st_mode));
}
/* search $PATH for an executable file;
/* search (*PATHp) for an executable file;
* return allocated string containing full path if found;
* return NULL otherwise;
* PATHp points to the component after the one where it was found
* (or NULL),
* you may call find_execable again with this PATHp to continue
* (if it's not NULL).
* return NULL otherwise; (PATHp is undefined)
* in all cases (*PATHp) contents will be trashed (s/:/NUL/).
*/
char *find_execable(const char *filename)
char *find_execable(const char *filename, char **PATHp)
{
char *path, *p, *n;
char *p, *n;
p = path = xstrdup(getenv("PATH"));
p = *PATHp;
while (p) {
n = strchr(p, ':');
if (n)
@ -35,15 +40,14 @@ char *find_execable(const char *filename)
if (*p != '\0') { /* it's not a PATH="foo::bar" situation */
p = concat_path_file(p, filename);
if (execable_file(p)) {
free(path);
*PATHp = n;
return p;
}
free(p);
}
p = n;
}
free(path);
return NULL;
} /* on loop exit p == NULL */
return p;
}
/* search $PATH for an executable file;
@ -52,7 +56,10 @@ char *find_execable(const char *filename)
*/
int exists_execable(const char *filename)
{
char *ret = find_execable(filename);
char *path = xstrdup(getenv("PATH"));
char *tmp = path;
char *ret = find_execable(filename, &tmp);
free(path);
if (ret) {
free(ret);
return 1;