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- #include "libbb.h"
- int mountpoint_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
- int mountpoint_main(int argc UNUSED_PARAM, char **argv)
- {
- struct stat st;
- const char *msg;
- char *arg;
- int rc, opt;
- opt = getopt32(argv, "^" "qdxn" "\0" "=1");
- #define OPT_q (1)
- #define OPT_d (2)
- #define OPT_x (4)
- #define OPT_n (8)
- arg = argv[optind];
- msg = "%s";
- rc = (opt & OPT_x) ? stat(arg, &st) : lstat(arg, &st);
- if (rc != 0)
- goto err;
- 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;
- }
- errno = 0;
- msg = "%s: not a block device";
- goto err;
- }
- errno = ENOTDIR;
- 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 is_not_mnt = (st_dev == st.st_dev) && (st_ino != st.st_ino);
- if (opt & OPT_d)
- printf("%u:%u\n", major(st_dev), minor(st_dev));
- if (opt & OPT_n) {
- const char *d = find_block_device(arg);
-
-
- if (!d) {
- d = "UNKNOWN";
-
- }
- printf("%s %s\n", d, arg);
- }
- if (!(opt & (OPT_q | OPT_d | OPT_n)))
- printf("%s is %sa mountpoint\n", arg, is_not_mnt ? "not " : "");
- return is_not_mnt;
- }
- arg = p;
-
- }
- err:
- if (!(opt & OPT_q))
- bb_perror_msg(msg, arg);
- return EXIT_FAILURE;
- }
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