85 lines
1.5 KiB
C
85 lines
1.5 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <mntent.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include "util.h"
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static void
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usage(void)
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{
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eprintf("usage: %s [-dqx] target\n", argv0);
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}
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int
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main(int argc, char *argv[])
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{
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int qflag = 0, dflag = 0, xflag = 0;
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struct mntent *me = NULL;
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FILE *fp;
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int ret = 0;
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struct stat st1, st2;
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ARGBEGIN {
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case 'q':
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qflag = 1;
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break;
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case 'd':
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dflag = 1;
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break;
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case 'x':
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xflag = 1;
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break;
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default:
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usage();
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} ARGEND;
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if (argc < 1)
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usage();
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if (stat(argv[0], &st1) < 0)
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eprintf("stat %s:", argv[0]);
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if (xflag) {
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if (!S_ISBLK(st1.st_mode))
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eprintf("stat: %s: not a block device\n",
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argv[0]);
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printf("%u:%u\n", major(st1.st_rdev),
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minor(st1.st_rdev));
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return EXIT_SUCCESS;
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}
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if (!S_ISDIR(st1.st_mode))
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eprintf("stat %s: not a directory\n", argv[0]);
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if (dflag) {
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printf("%u:%u\n", major(st1.st_dev),
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minor(st1.st_dev));
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return EXIT_SUCCESS;
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}
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fp = setmntent("/proc/mounts", "r");
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if (!fp)
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eprintf("setmntent %s:", "/proc/mounts");
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while ((me = getmntent(fp)) != NULL) {
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if (stat(me->mnt_dir, &st2) < 0)
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eprintf("stat %s:", me->mnt_dir);
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if (st1.st_dev == st2.st_dev &&
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st1.st_ino == st2.st_ino)
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break;
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}
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endmntent(fp);
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if (me == NULL)
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ret = 1;
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if (!qflag)
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printf("%s %s a mountpoint\n", argv[0],
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!ret ? "is" : "is not");
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return ret;
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}
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