1 /* vi: set sw=4 ts=4: */
3 * Which implementation for busybox
5 * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
6 * Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
8 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
10 * Based on which from debianutils
13 //usage:#define which_trivial_usage
14 //usage: "[COMMAND]..."
15 //usage:#define which_full_usage "\n\n"
16 //usage: "Locate a COMMAND"
18 //usage:#define which_example_usage
19 //usage: "$ which login\n"
20 //usage: "/bin/login\n"
24 int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
25 int which_main(int argc UNUSED_PARAM, char **argv)
28 int status = EXIT_SUCCESS;
32 opt_complementary = "-1"; /* at least one argument */
33 IF_DESKTOP(opt =) getopt32(argv, "a");
36 /* This matches what is seen on e.g. ubuntu.
37 * "which" there is a shell script. */
38 path = getenv("PATH");
40 path = (char*)bb_PATH_root_path;
42 path += 5; /* skip "PATH=" */
47 /* Much bloat just to support -a */
48 if (strchr(*argv, '/')) {
49 if (execable_file(*argv)) {
53 status = EXIT_FAILURE;
55 char *path2 = xstrdup(path);
58 p = find_execable(*argv, &tmp);
60 status = EXIT_FAILURE;
66 /* -a: show matches in all PATH components */
68 p = find_execable(*argv, &tmp);
77 /* Just ignoring -a */
78 if (strchr(*argv, '/')) {
79 if (execable_file(*argv)) {
84 char *path2 = xstrdup(path);
86 p = find_execable(*argv, &tmp);
94 status = EXIT_FAILURE;
96 } while (*(++argv) != NULL);
98 fflush_stdout_and_exit(status);