blob: c0f897809825a9ad725b88e09b5b5af113e7ed42
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
4 | * Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu> |
5 | * |
6 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
7 | */ |
8 | //config:config WHICH |
9 | //config: bool "which" |
10 | //config: default y |
11 | //config: help |
12 | //config: which is used to find programs in your PATH and |
13 | //config: print out their pathnames. |
14 | |
15 | //applet:IF_WHICH(APPLET(which, BB_DIR_USR_BIN, BB_SUID_DROP)) |
16 | |
17 | //kbuild:lib-$(CONFIG_WHICH) += which.o |
18 | |
19 | //usage:#define which_trivial_usage |
20 | //usage: "[COMMAND]..." |
21 | //usage:#define which_full_usage "\n\n" |
22 | //usage: "Locate a COMMAND" |
23 | //usage: |
24 | //usage:#define which_example_usage |
25 | //usage: "$ which login\n" |
26 | //usage: "/bin/login\n" |
27 | |
28 | #include "libbb.h" |
29 | |
30 | int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
31 | int which_main(int argc UNUSED_PARAM, char **argv) |
32 | { |
33 | const char *env_path; |
34 | int status = 0; |
35 | |
36 | env_path = getenv("PATH"); |
37 | if (!env_path) |
38 | env_path = bb_default_root_path; |
39 | |
40 | opt_complementary = "-1"; /* at least one argument */ |
41 | getopt32(argv, "a"); |
42 | argv += optind; |
43 | |
44 | do { |
45 | int missing = 1; |
46 | |
47 | /* If file contains a slash don't use PATH */ |
48 | if (strchr(*argv, '/')) { |
49 | if (file_is_executable(*argv)) { |
50 | missing = 0; |
51 | puts(*argv); |
52 | } |
53 | } else { |
54 | char *path; |
55 | char *tmp; |
56 | char *p; |
57 | |
58 | path = tmp = xstrdup(env_path); |
59 | while ((p = find_executable(*argv, &tmp)) != NULL) { |
60 | missing = 0; |
61 | puts(p); |
62 | free(p); |
63 | if (!option_mask32) /* -a not set */ |
64 | break; |
65 | } |
66 | free(path); |
67 | } |
68 | status |= missing; |
69 | } while (*++argv); |
70 | |
71 | return status; |
72 | } |
73 |