| 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 | #include "libbb.h"
|
|---|
| 14 |
|
|---|
| 15 | int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|---|
| 16 | int which_main(int argc UNUSED_PARAM, char **argv)
|
|---|
| 17 | {
|
|---|
| 18 | IF_DESKTOP(int opt;)
|
|---|
| 19 | int status = EXIT_SUCCESS;
|
|---|
| 20 | char *path;
|
|---|
| 21 | char *p;
|
|---|
| 22 |
|
|---|
| 23 | opt_complementary = "-1"; /* at least one argument */
|
|---|
| 24 | IF_DESKTOP(opt =) getopt32(argv, "a");
|
|---|
| 25 | argv += optind;
|
|---|
| 26 |
|
|---|
| 27 | /* This matches what is seen on e.g. ubuntu.
|
|---|
| 28 | * "which" there is a shell script. */
|
|---|
| 29 | path = getenv("PATH");
|
|---|
| 30 | if (!path) {
|
|---|
| 31 | path = (char*)bb_PATH_root_path;
|
|---|
| 32 | putenv(path);
|
|---|
| 33 | path += 5; /* skip "PATH=" */
|
|---|
| 34 | }
|
|---|
| 35 |
|
|---|
| 36 | do {
|
|---|
| 37 | #if ENABLE_DESKTOP
|
|---|
| 38 | /* Much bloat just to support -a */
|
|---|
| 39 | if (strchr(*argv, '/')) {
|
|---|
| 40 | if (execable_file(*argv)) {
|
|---|
| 41 | puts(*argv);
|
|---|
| 42 | continue;
|
|---|
| 43 | }
|
|---|
| 44 | status = EXIT_FAILURE;
|
|---|
| 45 | } else {
|
|---|
| 46 | char *path2 = xstrdup(path);
|
|---|
| 47 | char *tmp = path2;
|
|---|
| 48 |
|
|---|
| 49 | p = find_execable(*argv, &tmp);
|
|---|
| 50 | if (!p)
|
|---|
| 51 | status = EXIT_FAILURE;
|
|---|
| 52 | else {
|
|---|
| 53 | print:
|
|---|
| 54 | puts(p);
|
|---|
| 55 | free(p);
|
|---|
| 56 | if (opt) {
|
|---|
| 57 | /* -a: show matches in all PATH components */
|
|---|
| 58 | if (tmp) {
|
|---|
| 59 | p = find_execable(*argv, &tmp);
|
|---|
| 60 | if (p)
|
|---|
| 61 | goto print;
|
|---|
| 62 | }
|
|---|
| 63 | }
|
|---|
| 64 | }
|
|---|
| 65 | free(path2);
|
|---|
| 66 | }
|
|---|
| 67 | #else
|
|---|
| 68 | /* Just ignoring -a */
|
|---|
| 69 | if (strchr(*argv, '/')) {
|
|---|
| 70 | if (execable_file(*argv)) {
|
|---|
| 71 | puts(*argv);
|
|---|
| 72 | continue;
|
|---|
| 73 | }
|
|---|
| 74 | } else {
|
|---|
| 75 | char *path2 = xstrdup(path);
|
|---|
| 76 | char *tmp = path2;
|
|---|
| 77 | p = find_execable(*argv, &tmp);
|
|---|
| 78 | free(path2);
|
|---|
| 79 | if (p) {
|
|---|
| 80 | puts(p);
|
|---|
| 81 | free(p);
|
|---|
| 82 | continue;
|
|---|
| 83 | }
|
|---|
| 84 | }
|
|---|
| 85 | status = EXIT_FAILURE;
|
|---|
| 86 | #endif
|
|---|
| 87 | } while (*(++argv) != NULL);
|
|---|
| 88 |
|
|---|
| 89 | fflush_stdout_and_exit(status);
|
|---|
| 90 | }
|
|---|
