fix dependencies of FEATURE_GETOPT_LONG

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

diff --git a/util-linux/losetup.c b/util-linux/losetup.c
index af0b03a5326f74d0fb3f64e78b210db5e41c147c..e224a4d541cf65774b35734b965e5f83e6d14638 100644 (file)
--- a/util-linux/losetup.c
+++ b/util-linux/losetup.c
@@ -7,46 +7,73 @@
  * 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) MAIN_EXTERNALLY_VISIBLE;
 int losetup_main(int argc, char **argv)
 {
-       unsigned long opt;
+       char dev[] = LOOP_NAME"0";
+       unsigned opt;
        char *opt_o;
-       int offset = 0;
+       char *s;
+       unsigned long long offset = 0;
 
-       opt = bb_getopt_ulflags(argc, argv, "do:", &opt_o);
+       /* max 2 args, all opts are mutually exclusive */
+       opt_complementary = "?2:d--of:o--df:f-do";
+       opt = getopt32(argv, "do:f", &opt_o);
        argc -= optind;
        argv += optind;
 
-       if (opt == 0x3) bb_show_usage(); // -d and -o (illegal)
+       if (opt == 0x2) // -o
+               offset = xatoull(opt_o);
+
+       if (opt == 0x4 && argc) // -f does not take any argument
+               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 (del_loop(argv[0]))
+                       bb_simple_perror_msg_and_die(argv[0]);
+               return EXIT_SUCCESS;
        }
 
-       if (opt == 0x2) // -o
-               offset = bb_xparse_number(opt_o, NULL);
-
-       /* -o or no option */
-
        if (argc == 2) {
+               /* -o or no option */
                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();
+                       bb_simple_perror_msg_and_die(argv[0]);
+               return EXIT_SUCCESS;
+       }
+
+       if (argc == 1) {
+               /* -o or no option */
+               s = query_loop(argv[0]);
+               if (!s)
+                       bb_simple_perror_msg_and_die(argv[0]);
                printf("%s: %s\n", argv[0], s);
-               if (ENABLE_FEATURE_CLEAN_UP) free(s);
-       } else
-               bb_show_usage();
+               if (ENABLE_FEATURE_CLEAN_UP)
+                       free(s);
+               return EXIT_SUCCESS;
+       }
+
+       /* -o, -f or no option */
+       while (1) {
+               s = query_loop(dev);
+               if (!s) {
+                       if (opt == 0x4) {
+                               puts(dev);
+                               return EXIT_SUCCESS;
+                       }
+               } else {
+                       if (opt != 0x4)
+                               printf("%s: %s\n", dev, s);
+                       if (ENABLE_FEATURE_CLEAN_UP)
+                               free(s);
+               }
+
+               if (++dev[sizeof(dev) - 2] > '9')
+                       break;
+       }
        return EXIT_SUCCESS;
 }