mirror of
https://git.busybox.net/busybox.git
synced 2024-12-30 08:53:25 +08:00
80 lines
1.6 KiB
C
80 lines
1.6 KiB
C
/* 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, 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;
|
|
}
|