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/* 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 "libbb.h" int losetup_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int losetup_main(int argc UNUSED_PARAM, char **argv) { unsigned opt; int n; char *opt_o; unsigned long long offset = 0; enum { OPT_d = (1 << 0), OPT_o = (1 << 1), OPT_f = (1 << 2), }; /* max 2 args, all opts are mutually exclusive */ opt_complementary = "?2:d--of:o--df:f--do"; opt = getopt32(argv, "do:f", &opt_o); argv += optind; if (opt == OPT_o) offset = xatoull(opt_o); if (opt == OPT_d) { /* -d BLOCKDEV */ if (!argv[0] || argv[1]) bb_show_usage(); if (del_loop(argv[0])) bb_simple_perror_msg_and_die(argv[0]); return EXIT_SUCCESS; } if (argv[0]) { char *s; if (opt == OPT_f) /* -f should not have arguments */ bb_show_usage(); if (argv[1]) { /* [-o OFS] BLOCKDEV FILE */ if (set_loop(&argv[0], argv[1], offset) < 0) bb_simple_perror_msg_and_die(argv[0]); return EXIT_SUCCESS; } /* [-o OFS] BLOCKDEV */ 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); return EXIT_SUCCESS; } /* [-o OFS|-f] with no params */ n = 0; while (1) { char *s; char dev[LOOP_NAMESIZE]; sprintf(dev, LOOP_FORMAT, n); s = query_loop(dev); n++; if (!s) { if (n > 9 && errno && errno != ENXIO) return EXIT_SUCCESS; if (opt == OPT_f) { puts(dev); return EXIT_SUCCESS; } } else { if (opt != OPT_f) printf("%s: %s\n", dev, s); if (ENABLE_FEATURE_CLEAN_UP) free(s); } } return EXIT_SUCCESS; } |