mirror of
https://github.com/topjohnwu/ndk-busybox.git
synced 2024-12-01 07:30:24 +00:00
defc1ea340
text data bss dec hex filename 808035 611 6868 815514 c719a busybox_old 804472 611 6868 811951 c63af busybox_unstripped
79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* Utility routines.
|
|
*
|
|
* Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
|
|
*
|
|
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
|
*/
|
|
|
|
#include "libbb.h"
|
|
|
|
/* check if path points to an executable file;
|
|
* return 1 if found;
|
|
* return 0 otherwise;
|
|
*/
|
|
int FAST_FUNC execable_file(const char *name)
|
|
{
|
|
struct stat s;
|
|
return (!access(name, X_OK) && !stat(name, &s) && S_ISREG(s.st_mode));
|
|
}
|
|
|
|
/* search (*PATHp) for an executable file;
|
|
* return allocated string containing full path if found;
|
|
* 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* FAST_FUNC find_execable(const char *filename, char **PATHp)
|
|
{
|
|
char *p, *n;
|
|
|
|
p = *PATHp;
|
|
while (p) {
|
|
n = strchr(p, ':');
|
|
if (n)
|
|
*n++ = '\0';
|
|
if (*p != '\0') { /* it's not a PATH="foo::bar" situation */
|
|
p = concat_path_file(p, filename);
|
|
if (execable_file(p)) {
|
|
*PATHp = n;
|
|
return p;
|
|
}
|
|
free(p);
|
|
}
|
|
p = n;
|
|
} /* on loop exit p == NULL */
|
|
return p;
|
|
}
|
|
|
|
/* search $PATH for an executable file;
|
|
* return 1 if found;
|
|
* return 0 otherwise;
|
|
*/
|
|
int FAST_FUNC exists_execable(const char *filename)
|
|
{
|
|
char *path = xstrdup(getenv("PATH"));
|
|
char *tmp = path;
|
|
char *ret = find_execable(filename, &tmp);
|
|
free(path);
|
|
if (ret) {
|
|
free(ret);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_PREFER_APPLETS
|
|
/* just like the real execvp, but try to launch an applet named 'file' first
|
|
*/
|
|
int FAST_FUNC bb_execvp(const char *file, char *const argv[])
|
|
{
|
|
return execvp(find_applet_by_name(file) >= 0 ? bb_busybox_exec_path : file,
|
|
argv);
|
|
}
|
|
#endif
|