fsck_minix: stop using data/bss

[oweals/busybox.git] / util-linux / losetup.c

diff --git a/util-linux/losetup.c b/util-linux/losetup.c
index e2ea538d59662eeeb92bcd5216c6f39808619046..e2d4e4d79162571f910ed09cd31ad41979eec091 100644 (file)
--- a/util-linux/losetup.c
+++ b/util-linux/losetup.c
@@ -1,58 +1,67 @@
+/* vi: set sw=4 ts=4: */
 /*
  * Mini losetup implementation for busybox
  *
  * Copyright (C) 2002  Matt Kraai.
  *
- * 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 tarball for details.
  */
 
 #include <getopt.h>
-#include <stdlib.h>
 
-#include "busybox.h"
+#include "libbb.h"
 
-int
-losetup_main (int argc, char **argv)
+int losetup_main(int argc, char **argv);
+int losetup_main(int argc, char **argv)
 {
-  int delete = 0;
-  int offset = 0;
-  int opt;
-
-  while ((opt = getopt (argc, argv, "do:")) != -1)
-    switch (opt)
-      {
-      case 'd':
-       delete = 1;
-       break;
-
-      case 'o':
-       offset = bb_xparse_number (optarg, NULL);
-       break;
-
-      default:
-       bb_show_usage();
-      }
-
-  if ((delete && (offset || optind + 1 != argc))
-      || (!delete && optind + 2 != argc))
-    bb_show_usage();
-
-  if (delete)
-    return del_loop (argv[optind]) ? EXIT_SUCCESS : EXIT_FAILURE;
-  else
-    return set_loop (argv[optind], argv[optind + 1], offset, &opt)
-      ? EXIT_FAILURE : EXIT_SUCCESS;
+       unsigned opt;
+       char *opt_o;
+       unsigned long long offset = 0;
+
+       opt = getopt32(argc, argv, "do:", &opt_o);
+       argc -= optind;
+       argv += optind;
+
+       if (opt == 0x3) // -d + -o (illegal)
+               bb_show_usage();
+
+       if (opt == 0x1) { // -d
+               /* detach takes exactly one argument */
+               if (argc != 1)
+                       bb_show_usage();
+               if (!del_loop(argv[0]))
+                       return EXIT_SUCCESS;
+               bb_perror_nomsg_and_die();
+       }
+
+       if (opt == 0x2) // -o
+               offset = xatoull(opt_o);
+
+       /* -o or no option */
+
+       if (argc == 2) {
+               if (set_loop(&argv[0], argv[1], offset) < 0)
+                       bb_perror_nomsg_and_die();
+       } else if (argc == 1) {
+               char *s = query_loop(argv[0]);
+               if (!s)
+                       bb_perror_nomsg_and_die();
+               printf("%s: %s\n", argv[0], s);
+               if (ENABLE_FEATURE_CLEAN_UP)
+                       free(s);
+       } else {
+               char dev[sizeof(LOOP_NAME"0")] = LOOP_NAME"0";
+               char c;
+               for (c = '0'; c <= '9'; ++c) {
+                       char *s;
+                       dev[sizeof(LOOP_NAME"0")-2] = c;
+                       s = query_loop(dev);
+                       if (s) {
+                               printf("%s: %s\n", dev, s);
+                               if (ENABLE_FEATURE_CLEAN_UP)
+                                       free(s);
+                       }
+               }
+       }
+       return EXIT_SUCCESS;
 }