* Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
* Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
*
- * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*
* Based on which from debianutils
*/
+//usage:#define which_trivial_usage
+//usage: "[COMMAND]..."
+//usage:#define which_full_usage "\n\n"
+//usage: "Locate a COMMAND"
+//usage:
+//usage:#define which_example_usage
+//usage: "$ which login\n"
+//usage: "/bin/login\n"
+
#include "libbb.h"
-int which_main(int argc, char **argv);
-int which_main(int argc, char **argv)
+int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int which_main(int argc UNUSED_PARAM, char **argv)
{
+ IF_DESKTOP(int opt;)
int status = EXIT_SUCCESS;
+ char *path;
char *p;
- if (argc <= 1 || argv[1][0] == '-') {
- bb_show_usage();
- }
+ opt_complementary = "-1"; /* at least one argument */
+ IF_DESKTOP(opt =) getopt32(argv, "a");
+ argv += optind;
-/* We shouldn't do this. Ever. Not our business.
- if (!getenv("PATH")) {
- putenv((char*)bb_PATH_root_path);
+ /* This matches what is seen on e.g. ubuntu.
+ * "which" there is a shell script. */
+ path = getenv("PATH");
+ if (!path) {
+ path = (char*)bb_PATH_root_path;
+ putenv(path);
+ path += 5; /* skip "PATH=" */
}
-*/
- while (--argc > 0) {
- argv++;
+ do {
+#if ENABLE_DESKTOP
+/* Much bloat just to support -a */
+ if (strchr(*argv, '/')) {
+ if (execable_file(*argv)) {
+ puts(*argv);
+ continue;
+ }
+ status = EXIT_FAILURE;
+ } else {
+ char *path2 = xstrdup(path);
+ char *tmp = path2;
+
+ p = find_execable(*argv, &tmp);
+ if (!p)
+ status = EXIT_FAILURE;
+ else {
+ print:
+ puts(p);
+ free(p);
+ if (opt) {
+ /* -a: show matches in all PATH components */
+ if (tmp) {
+ p = find_execable(*argv, &tmp);
+ if (p)
+ goto print;
+ }
+ }
+ }
+ free(path2);
+ }
+#else
+/* Just ignoring -a */
if (strchr(*argv, '/')) {
if (execable_file(*argv)) {
puts(*argv);
continue;
}
} else {
- p = find_execable(*argv);
+ char *path2 = xstrdup(path);
+ char *tmp = path2;
+ p = find_execable(*argv, &tmp);
+ free(path2);
if (p) {
puts(p);
free(p);
}
}
status = EXIT_FAILURE;
- }
+#endif
+ } while (*(++argv) != NULL);
fflush_stdout_and_exit(status);
}