| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* vi: set sw=4 ts=4: */ |
| 2 | /* |
| 3 | * Which implementation for busybox |
| 4 | * |
| 5 | * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org> |
| 6 | * Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu> |
| 7 | * |
| 8 | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| 9 | * |
| 10 | * Based on which from debianutils |
| 11 | */ |
| 12 | |
| 13 | //usage:#define which_trivial_usage |
| 14 | //usage: "[COMMAND]..." |
| 15 | //usage:#define which_full_usage "\n\n" |
| 16 | //usage: "Locate a COMMAND" |
| 17 | //usage: |
| 18 | //usage:#define which_example_usage |
| 19 | //usage: "$ which login\n" |
| 20 | //usage: "/bin/login\n" |
| 21 | |
| 22 | #include "libbb.h" |
| 23 | |
| 24 | int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| 25 | int which_main(int argc UNUSED_PARAM, char **argv) |
| 26 | { |
| 27 | IF_DESKTOP(int opt;) |
| 28 | int status = EXIT_SUCCESS; |
| 29 | char *path; |
| 30 | char *p; |
| 31 | |
| 32 | opt_complementary = "-1"; /* at least one argument */ |
| 33 | IF_DESKTOP(opt =) getopt32(argv, "a"); |
| 34 | argv += optind; |
| 35 | |
| 36 | /* This matches what is seen on e.g. ubuntu. |
| 37 | * "which" there is a shell script. */ |
| 38 | path = getenv("PATH"); |
| 39 | if (!path) { |
| 40 | path = (char*)bb_PATH_root_path; |
| 41 | putenv(path); |
| 42 | path += 5; /* skip "PATH=" */ |
| 43 | } |
| 44 | |
| 45 | do { |
| 46 | #if ENABLE_DESKTOP |
| 47 | /* Much bloat just to support -a */ |
| 48 | if (strchr(*argv, '/')) { |
| 49 | if (execable_file(*argv)) { |
| 50 | puts(*argv); |
| 51 | continue; |
| 52 | } |
| 53 | status = EXIT_FAILURE; |
| 54 | } else { |
| 55 | char *path2 = xstrdup(path); |
| 56 | char *tmp = path2; |
| 57 | |
| 58 | p = find_execable(*argv, &tmp); |
| 59 | if (!p) |
| 60 | status = EXIT_FAILURE; |
| 61 | else { |
| 62 | print: |
| 63 | puts(p); |
| 64 | free(p); |
| 65 | if (opt) { |
| 66 | /* -a: show matches in all PATH components */ |
| 67 | if (tmp) { |
| 68 | p = find_execable(*argv, &tmp); |
| 69 | if (p) |
| 70 | goto print; |
| 71 | } |
| 72 | } |
| 73 | } |
| 74 | free(path2); |
| 75 | } |
| 76 | #else |
| 77 | /* Just ignoring -a */ |
| 78 | if (strchr(*argv, '/')) { |
| 79 | if (execable_file(*argv)) { |
| 80 | puts(*argv); |
| 81 | continue; |
| 82 | } |
| 83 | } else { |
| 84 | char *path2 = xstrdup(path); |
| 85 | char *tmp = path2; |
| 86 | p = find_execable(*argv, &tmp); |
| 87 | free(path2); |
| 88 | if (p) { |
| 89 | puts(p); |
| 90 | free(p); |
| 91 | continue; |
| 92 | } |
| 93 | } |
| 94 | status = EXIT_FAILURE; |
| 95 | #endif |
| 96 | } while (*(++argv) != NULL); |
| 97 | |
| 98 | fflush_stdout_and_exit(status); |
| 99 | } |