Contents of /tags/mkinitrd-6_2_0/busybox/debianutils/which.c
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Sun May 30 11:54:28 2010 UTC (14 years, 4 months ago) by niro
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Sun May 30 11:54:28 2010 UTC (14 years, 4 months ago) by niro
File MIME type: text/plain
File size: 1801 byte(s)
tagged 'mkinitrd-6_2_0'
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 the GPL v2 or later, see the file LICENSE in this tarball. |
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 | } |