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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 <getopt.h>
#include <stdlib.h>
#include "busybox.h"
int losetup_main(int argc, char **argv)
{
unsigned long opt;
char *opt_o;
int offset = 0;
opt = bb_getopt_ulflags(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 = bb_xparse_number(opt_o, NULL);
/* -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[11] = "/dev/loop0";
char c;
for (c = '0'; c <= '9'; ++c) {
char *s;
dev[9] = c;
s = query_loop(dev);
if (s) {
printf("%s: %s\n", dev, s);
if (ENABLE_FEATURE_CLEAN_UP) free(s);
}
}
}
return EXIT_SUCCESS;
}
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