/* 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) MAIN_EXTERNALLY_VISIBLE; int losetup_main(int argc, char **argv) { char dev[] = LOOP_NAME"0"; unsigned opt; char *opt_o; char *s; unsigned long long offset = 0; /* max 2 args, all opts are mutially exclusive */ opt_complementary = "?2:d--of:o--df:f-do"; opt = getopt32(argv, "do:f", &opt_o); argc -= optind; argv += optind; 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])) bb_simple_perror_msg_and_die(argv[0]); return EXIT_SUCCESS; } if (argc == 2) { /* -o or no option */ if (set_loop(&argv[0], argv[1], offset) < 0) 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); 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; }