5cb46485d
Denis Vlasenko
2006-10-12
Subject
execable.c: forgot to do "svn add" again...
Binary
No binary (build failed)
Architecture & Compiler Flags
—
Build Log
(log yok)
Commit Diff GitHub →
libbb/execable.c+62 -0
| @@ -0,0 +1,62 @@ | |
| + | /* vi: set sw=4 ts=4: */ |
| + | /* |
| + | * Utility routines. |
| + | * |
| + | * Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu> |
| + | * |
| + | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
| + | */ |
| + | |
| + | #include "libbb.h" |
| + | |
| + | /* check if path points to an executable file; |
| + | * return 1 if found; |
| + | * return 0 otherwise; |
| + | */ |
| + | int execable_file(const char *name) |
| + | { |
| + | struct stat s; |
| + | return (!access(name, X_OK) && !stat(name, &s) && S_ISREG(s.st_mode)); |
| + | } |
| + | |
| + | /* search $PATH for an executable file; |
| + | * return allocated string containing full path if found; |
| + | * return NULL otherwise; |
| + | */ |
| + | char *find_execable(const char *filename) |
| + | { |
| + | char *path, *p, *n; |
| + | |
| + | p = path = xstrdup(getenv("PATH") ? : ""); |
| + | while (p) { |
| + | n = strchr(p, ':'); |
| + | if (n) |
| + | *n++ = '\0'; |
| + | if (*p != '\0') { /* it's not a PATH="foo::bar" situation */ |
| + | p = concat_path_file(p, filename); |
| + | if (execable_file(p)) { |
| + | free(path); |
| + | return p; |
| + | } |
| + | free(p); |
| + | } |
| + | p = n; |
| + | } |
| + | free(path); |
| + | return NULL; |
| + | } |
| + | |
| + | /* search $PATH for an executable file; |
| + | * return 1 if found; |
| + | * return 0 otherwise; |
| + | */ |
| + | int exists_execable(const char *filename) |
| + | { |
| + | char *ret = find_execable(filename); |
| + | if (ret) { |
| + | free(ret); |
| + | return 1; |
| + | } |
| + | return 0; |
| + | } |
| + | |