67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* mountpoint implementation for busybox
|
|
*
|
|
* Copyright (C) 2005 Bernhard Fischer
|
|
*
|
|
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
|
|
*
|
|
* Based on sysvinit's mountpoint
|
|
*/
|
|
|
|
#include "libbb.h"
|
|
|
|
int mountpoint_main(int argc, char **argv);
|
|
int mountpoint_main(int argc, char **argv)
|
|
{
|
|
struct stat st;
|
|
char *arg;
|
|
int opt = getopt32(argv, "qdx");
|
|
#define OPT_q (1)
|
|
#define OPT_d (2)
|
|
#define OPT_x (4)
|
|
|
|
if (optind != argc - 1)
|
|
bb_show_usage();
|
|
|
|
arg = argv[optind];
|
|
|
|
if ( (opt & OPT_x && stat(arg, &st) == 0) || (lstat(arg, &st) == 0) ) {
|
|
if (opt & OPT_x) {
|
|
if (S_ISBLK(st.st_mode)) {
|
|
printf("%u:%u\n", major(st.st_rdev),
|
|
minor(st.st_rdev));
|
|
return EXIT_SUCCESS;
|
|
} else {
|
|
if (opt & OPT_q)
|
|
bb_putchar('\n');
|
|
else
|
|
bb_error_msg("%s: not a block device", arg);
|
|
}
|
|
return EXIT_FAILURE;
|
|
} else
|
|
if (S_ISDIR(st.st_mode)) {
|
|
dev_t st_dev = st.st_dev;
|
|
ino_t st_ino = st.st_ino;
|
|
char *p = xasprintf("%s/..", arg);
|
|
|
|
if (stat(p, &st) == 0) {
|
|
int ret = (st_dev != st.st_dev) ||
|
|
(st_dev == st.st_dev && st_ino == st.st_ino);
|
|
if (opt & OPT_d)
|
|
printf("%u:%u\n", major(st_dev), minor(st_dev));
|
|
else if (!(opt & OPT_q))
|
|
printf("%s is %sa mountpoint\n", arg, ret?"":"not ");
|
|
return !ret;
|
|
}
|
|
} else {
|
|
if (!(opt & OPT_q))
|
|
bb_error_msg("%s: not a directory", arg);
|
|
return EXIT_FAILURE;
|
|
}
|
|
}
|
|
if (!(opt & OPT_q))
|
|
bb_simple_perror_msg(arg);
|
|
return EXIT_FAILURE;
|
|
}
|