Last change
on this file since 3189 was 1765, checked in by Bruno Cornec, 17 years ago |
Update to busybox 1.7.2
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-
Property svn:eol-style
set to
native
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File size:
1.4 KB
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Rev | Line | |
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[1765] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Utility routines.
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| 4 | *
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| 5 | * Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
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| 6 | *
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| 7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 8 | */
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| 9 |
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| 10 | #include "libbb.h"
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| 11 |
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| 12 | /* check if path points to an executable file;
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| 13 | * return 1 if found;
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| 14 | * return 0 otherwise;
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| 15 | */
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| 16 | int execable_file(const char *name)
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| 17 | {
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| 18 | struct stat s;
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| 19 | return (!access(name, X_OK) && !stat(name, &s) && S_ISREG(s.st_mode));
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| 20 | }
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| 21 |
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| 22 | /* search $PATH for an executable file;
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| 23 | * return allocated string containing full path if found;
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| 24 | * return NULL otherwise;
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| 25 | */
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| 26 | char *find_execable(const char *filename)
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| 27 | {
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| 28 | char *path, *p, *n;
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| 29 |
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| 30 | p = path = xstrdup(getenv("PATH"));
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| 31 | while (p) {
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| 32 | n = strchr(p, ':');
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| 33 | if (n)
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| 34 | *n++ = '\0';
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| 35 | if (*p != '\0') { /* it's not a PATH="foo::bar" situation */
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| 36 | p = concat_path_file(p, filename);
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| 37 | if (execable_file(p)) {
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| 38 | free(path);
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| 39 | return p;
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| 40 | }
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| 41 | free(p);
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| 42 | }
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| 43 | p = n;
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| 44 | }
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| 45 | free(path);
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| 46 | return NULL;
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| 47 | }
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| 48 |
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| 49 | /* search $PATH for an executable file;
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| 50 | * return 1 if found;
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| 51 | * return 0 otherwise;
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| 52 | */
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| 53 | int exists_execable(const char *filename)
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| 54 | {
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| 55 | char *ret = find_execable(filename);
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| 56 | if (ret) {
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| 57 | free(ret);
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| 58 | return 1;
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| 59 | }
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| 60 | return 0;
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| 61 | }
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| 62 |
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| 63 | #if ENABLE_FEATURE_PREFER_APPLETS
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| 64 | /* just like the real execvp, but try to launch an applet named 'file' first
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| 65 | */
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| 66 | int bb_execvp(const char *file, char *const argv[])
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| 67 | {
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| 68 | return execvp(find_applet_by_name(file) ? bb_busybox_exec_path : file,
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| 69 | argv);
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| 70 | }
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| 71 | #endif
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