libarchive: open_zipped() does not need to check extensions for e.g. gzip

[oweals/busybox.git] / debianutils / which.c

diff --git a/debianutils/which.c b/debianutils/which.c
index b2af5a8ea637d2875ce79f6f0261805703be6679..15fd598b782f7076ab59dbf27730518affaf3d0c 100644 (file)
--- a/debianutils/which.c
+++ b/debianutils/which.c
@@ -2,80 +2,98 @@
 /*
  * Which implementation for busybox
  *
- * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
- * Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.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
  */
 
-/* getopt not needed */
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include "busybox.h"
+//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"
 
-extern int which_main(int argc, char **argv)
+#include "libbb.h"
+
+int which_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int which_main(int argc UNUSED_PARAM, char **argv)
 {
-       char *path_list, *path_n;
-       struct stat filestat;
-       int i, count=1, found, status = EXIT_SUCCESS;
+       IF_DESKTOP(int opt;)
+       int status = EXIT_SUCCESS;
+       char *path;
+       char *p;
 
-       if (argc <= 1 || **(argv + 1) == '-')
-               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) { 
-               path_n = path_list;
-               argv++;
-               found = 0;
-               for (i = 0; i < count; i++) {
-                       char *buf;
-                       buf = concat_path_file(path_n, *argv);
-                       if (stat (buf, &filestat) == 0
-                           && filestat.st_mode & S_IXUSR)
-                       {
-                               puts(buf);
-                               found = 1;
-                               break;
+       do {
+#if ENABLE_DESKTOP
+/* Much bloat just to support -a */
+               if (strchr(*argv, '/')) {
+                       if (execable_file(*argv)) {
+                               puts(*argv);
+                               continue;
                        }
-                       free(buf);
-                       path_n += (strlen(path_n) + 1);
-               }
-               if (!found)
                        status = EXIT_FAILURE;
-       }
-       return status;
-}
+               } else {
+                       char *path2 = xstrdup(path);
+                       char *tmp = path2;
 
-/*
-Local Variables:
-c-file-style: "linux"
-c-basic-offset: 4
-tab-width: 4
-End:
-*/
+                       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 {
+                       char *path2 = xstrdup(path);
+                       char *tmp = path2;
+                       p = find_execable(*argv, &tmp);
+                       free(path2);
+                       if (p) {
+                               puts(p);
+                               free(p);
+                               continue;
+                       }
+               }
+               status = EXIT_FAILURE;
+#endif
+       } while (*(++argv) != NULL);
+
+       fflush_stdout_and_exit(status);
+}