Contents of /trunk/mkinitrd-magellan/busybox/libbb/execable.c
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Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 1176 byte(s)
Sat Sep 1 22:45:15 2007 UTC (17 years ago) by niro
File MIME type: text/plain
File size: 1176 byte(s)
-import if magellan mkinitrd; it is a fork of redhats mkinitrd-5.0.8 with all magellan patches and features; deprecates magellan-src/mkinitrd
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * Utility routines. |
4 | * |
5 | * Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu> |
6 | * |
7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
8 | */ |
9 | |
10 | #include "libbb.h" |
11 | |
12 | /* check if path points to an executable file; |
13 | * return 1 if found; |
14 | * return 0 otherwise; |
15 | */ |
16 | int execable_file(const char *name) |
17 | { |
18 | struct stat s; |
19 | return (!access(name, X_OK) && !stat(name, &s) && S_ISREG(s.st_mode)); |
20 | } |
21 | |
22 | /* search $PATH for an executable file; |
23 | * return allocated string containing full path if found; |
24 | * return NULL otherwise; |
25 | */ |
26 | char *find_execable(const char *filename) |
27 | { |
28 | char *path, *p, *n; |
29 | |
30 | p = path = xstrdup(getenv("PATH")); |
31 | while (p) { |
32 | n = strchr(p, ':'); |
33 | if (n) |
34 | *n++ = '\0'; |
35 | if (*p != '\0') { /* it's not a PATH="foo::bar" situation */ |
36 | p = concat_path_file(p, filename); |
37 | if (execable_file(p)) { |
38 | free(path); |
39 | return p; |
40 | } |
41 | free(p); |
42 | } |
43 | p = n; |
44 | } |
45 | free(path); |
46 | return NULL; |
47 | } |
48 | |
49 | /* search $PATH for an executable file; |
50 | * return 1 if found; |
51 | * return 0 otherwise; |
52 | */ |
53 | int exists_execable(const char *filename) |
54 | { |
55 | char *ret = find_execable(filename); |
56 | if (ret) { |
57 | free(ret); |
58 | return 1; |
59 | } |
60 | return 0; |
61 | } |