/*
* Which implementation for busybox
*
- * Copyright (C) 1999-2003 by Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ * Copyright (C) 2006 Gabriel Somlo <somlo at cmu.edu>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * 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 <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-
-#include "busybox.h"
+#include "libbb.h"
-
-extern 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)
{
- char *path_list;
- int i, count=1, status = EXIT_SUCCESS;
+ IF_DESKTOP(int opt;)
+ int status = EXIT_SUCCESS;
+ char *path;
+ char *p;
- if (argc <= 1 || **(argv + 1) == '-') {
- bb_show_usage();
- }
- argc--;
+ opt_complementary = "-1"; /* at least one argument */
+ IF_DESKTOP(opt =) getopt32(argv, "a");
+ argv += optind;
- path_list = getenv("PATH");
- if (path_list != NULL) {
- for (i=strlen(path_list); i > 0; i--) {
- if (path_list[i]==':') {
- path_list[i]=0;
- count++;
- }
- }
- } else {
- path_list = "/bin\0/sbin\0/usr/bin\0/usr/sbin\0/usr/local/bin";
- count = 5;
+ /* 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) {
- char *buf;
- char *path_n;
- char found = 0;
- argv++;
-
- /*
- * Check if we were given the full path, first.
- * Otherwise see if the file exists in our $PATH.
- */
- path_n = path_list;
- buf = *argv;
- if (access(buf, X_OK) == 0) {
- found = 1;
+ do {
+#if ENABLE_DESKTOP
+/* Much bloat just to support -a */
+ if (strchr(*argv, '/')) {
+ if (execable_file(*argv)) {
+ puts(*argv);
+ continue;
+ }
+ status = EXIT_FAILURE;
} else {
- for (i = 0; i < count; i++) {
- buf = concat_path_file(path_n, *argv);
- if (access(buf, X_OK) == 0) {
- found = 1;
- break;
+ 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(buf);
- path_n += (strlen(path_n) + 1);
}
+ free(path2);
}
- if (found) {
- puts(buf);
+#else
+/* Just ignoring -a */
+ if (strchr(*argv, '/')) {
+ if (execable_file(*argv)) {
+ puts(*argv);
+ continue;
+ }
} else {
- status = EXIT_FAILURE;
+ char *path2 = xstrdup(path);
+ char *tmp = path2;
+ p = find_execable(*argv, &tmp);
+ free(path2);
+ if (p) {
+ puts(p);
+ free(p);
+ continue;
+ }
}
- }
- return status;
-}
+ status = EXIT_FAILURE;
+#endif
+ } while (*(++argv) != NULL);
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
+ fflush_stdout_and_exit(status);
+}