| /* vi: set sw=4 ts=4: */ |
| /* |
| * Mini losetup implementation for busybox |
| * |
| * Copyright (C) 2002 Matt Kraai. |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
| */ |
| |
| #include <getopt.h> |
| |
| #include "libbb.h" |
| |
| int losetup_main(int argc, char **argv); |
| int losetup_main(int argc, char **argv) |
| { |
| 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; |
| } |