* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
//config:config WHICH
-//config: bool "which"
+//config: bool "which (3.7 kb)"
//config: default y
//config: help
-//config: which is used to find programs in your PATH and
-//config: print out their pathnames.
+//config: which is used to find programs in your PATH and
+//config: print out their pathnames.
-//applet:IF_WHICH(APPLET(which, BB_DIR_USR_BIN, BB_SUID_DROP))
+//applet:IF_WHICH(APPLET_NOFORK(which, which, BB_DIR_USR_BIN, BB_SUID_DROP, which))
//kbuild:lib-$(CONFIG_WHICH) += which.o
int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int which_main(int argc UNUSED_PARAM, char **argv)
{
- const char *env_path;
+ char *env_path;
int status = 0;
+ /* This sizeof(): bb_default_root_path is shorter than BB_PATH_ROOT_PATH */
+ char buf[sizeof(BB_PATH_ROOT_PATH)];
env_path = getenv("PATH");
if (!env_path)
- env_path = bb_default_root_path;
+ /* env_path must be writable, and must not alloc, so... */
+ env_path = strcpy(buf, bb_default_root_path);
- opt_complementary = "-1"; /* at least one argument */
- getopt32(argv, "a");
+ getopt32(argv, "^" "a" "\0" "-1"/*at least one arg*/);
argv += optind;
do {
}
} else {
char *path;
- char *tmp;
char *p;
- path = tmp = xstrdup(env_path);
- while ((p = find_executable(*argv, &tmp)) != NULL) {
+ path = env_path;
+ /* NOFORK NB: xmalloc inside find_executable(), must have no allocs above! */
+ while ((p = find_executable(*argv, &path)) != NULL) {
missing = 0;
puts(p);
free(p);
if (!option_mask32) /* -a not set */
break;
}
- free(path);
}
status |= missing;
} while (*++argv);