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[1765] | 1 | /* vi: set sw=4 ts=4: */
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[821] | 2 | /*
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| 3 | * Mini losetup implementation for busybox
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| 4 | *
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| 5 | * Copyright (C) 2002 Matt Kraai.
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| 6 | *
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| 7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 8 | */
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| 9 |
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| 10 | #include <getopt.h>
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| 11 |
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[1765] | 12 | #include "libbb.h"
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[821] | 13 |
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[1765] | 14 | int losetup_main(int argc, char **argv);
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| 15 | int losetup_main(int argc, char **argv)
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[821] | 16 | {
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[1765] | 17 | unsigned opt;
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| 18 | char *opt_o;
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| 19 | unsigned long long offset = 0;
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[821] | 20 |
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[1765] | 21 | opt = getopt32(argv, "do:", &opt_o);
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| 22 | argc -= optind;
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| 23 | argv += optind;
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[821] | 24 |
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[1765] | 25 | if (opt == 0x3) // -d + -o (illegal)
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| 26 | bb_show_usage();
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| 27 |
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| 28 | if (opt == 0x1) { // -d
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| 29 | /* detach takes exactly one argument */
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| 30 | if (argc != 1)
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| 31 | bb_show_usage();
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| 32 | if (!del_loop(argv[0]))
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| 33 | return EXIT_SUCCESS;
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| 34 | bb_perror_nomsg_and_die();
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| 35 | }
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| 36 |
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| 37 | if (opt == 0x2) // -o
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| 38 | offset = xatoull(opt_o);
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| 39 |
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| 40 | /* -o or no option */
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| 41 |
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| 42 | if (argc == 2) {
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| 43 | if (set_loop(&argv[0], argv[1], offset) < 0)
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| 44 | bb_perror_nomsg_and_die();
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| 45 | } else if (argc == 1) {
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| 46 | char *s = query_loop(argv[0]);
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| 47 | if (!s)
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| 48 | bb_perror_nomsg_and_die();
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| 49 | printf("%s: %s\n", argv[0], s);
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| 50 | if (ENABLE_FEATURE_CLEAN_UP)
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| 51 | free(s);
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| 52 | } else {
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| 53 | char dev[sizeof(LOOP_NAME"0")] = LOOP_NAME"0";
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| 54 | char c;
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| 55 | for (c = '0'; c <= '9'; ++c) {
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| 56 | char *s;
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| 57 | dev[sizeof(LOOP_NAME"0")-2] = c;
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| 58 | s = query_loop(dev);
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| 59 | if (s) {
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| 60 | printf("%s: %s\n", dev, s);
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| 61 | if (ENABLE_FEATURE_CLEAN_UP)
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| 62 | free(s);
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| 63 | }
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| 64 | }
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| 65 | }
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[821] | 66 | return EXIT_SUCCESS;
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| 67 | }
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