65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini losetup implementation for busybox
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*
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* Copyright (C) 2002 Matt Kraai.
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include <getopt.h>
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#include <stdlib.h>
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#include "busybox.h"
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int losetup_main(int argc, char **argv)
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{
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unsigned long opt;
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char *opt_o;
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int offset = 0;
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opt = bb_getopt_ulflags(argc, argv, "do:", &opt_o);
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argc -= optind;
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argv += optind;
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if (opt == 0x3) // -d + -o (illegal)
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bb_show_usage();
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if (opt == 0x1) { // -d
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/* detach takes exactly one argument */
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if (argc != 1)
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bb_show_usage();
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if (!del_loop(argv[0]))
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return EXIT_SUCCESS;
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bb_perror_nomsg_and_die();
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}
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if (opt == 0x2) // -o
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offset = bb_xparse_number(opt_o, NULL);
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/* -o or no option */
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if (argc == 2) {
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if (set_loop(&argv[0], argv[1], offset) < 0)
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bb_perror_nomsg_and_die();
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} else if (argc == 1) {
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char *s = query_loop(argv[0]);
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if (!s) bb_perror_nomsg_and_die();
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printf("%s: %s\n", argv[0], s);
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if (ENABLE_FEATURE_CLEAN_UP) free(s);
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} else {
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char dev[11] = "/dev/loop0";
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char c;
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for (c = '0'; c <= '9'; ++c) {
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char *s;
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dev[9] = c;
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s = query_loop(dev);
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if (s) {
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printf("%s: %s\n", dev, s);
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if (ENABLE_FEATURE_CLEAN_UP) free(s);
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}
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}
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}
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return EXIT_SUCCESS;
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}
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