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annotate toys/mountpoint.c @ 562:4d802d438983

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Match uint64_t with PRIu64 to avoid warnings on 64 bit builds.
author Rob Landley <rob@landley.net>
date Sat, 14 Apr 2012 21:27:00 -0500
parents 8a1d45dd8af1
children
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Elie De Brauwer <eliedebrauwer@gmail.com>
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1 /* vi: set sw=4 ts=4:
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2 *
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3 * mountpoint.c - Check if a directory is a mountpoint.
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4 *
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5 * Copyright 2012 Elie De Brauwer <eliedebrauwer@gmail.com>
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6 *
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7 * Not in SUSv4.
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8
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9 USE_MOUNTPOINT(NEWTOY(mountpoint, "<1qdx", TOYFLAG_BIN))
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10
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11 config MOUNTPOINT
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12 bool "mountpoint"
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13 default y
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14 help
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15 usage: mountpoint [-q] [-d] directory
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16 mountpoint [-q] [-x] device
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17 -q Be quiet, return zero if directory is a mountpoint
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18 -d Print major/minor device number of the directory
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19 -x Print major/minor device number of the block device
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20 */
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21
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22 #include "toys.h"
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23
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24 void mountpoint_main(void)
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25 {
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26 struct stat st1, st2;
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27 int res = 0;
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28 int quiet = toys.optflags & 0x4;
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29 toys.exitval = 1; // be pessimistic
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30 strncpy(toybuf, toys.optargs[0], sizeof(toybuf));
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31 if (((toys.optflags & 0x1) && lstat(toybuf, &st1)) || stat(toybuf, &st1))
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32 perror_exit("%s", toybuf);
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33
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34 if (toys.optflags & 0x1){
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35 if (S_ISBLK(st1.st_mode)) {
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36 if (!quiet) printf("%u:%u\n", major(st1.st_rdev), minor(st1.st_rdev));
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37 toys.exitval = 0;
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38 return;
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39 }
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40 if (!quiet) printf("%s: not a block device\n", toybuf);
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41 return;
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42 }
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43
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44 if(!S_ISDIR(st1.st_mode)){
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45 if (!quiet) printf("%s: not a directory\n", toybuf);
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46 return;
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47 }
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48 strncat(toybuf, "/..", sizeof(toybuf));
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49 stat(toybuf, &st2);
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50 res = (st1.st_dev != st2.st_dev) ||
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51 (st1.st_dev == st2.st_dev && st1.st_ino == st2.st_ino);
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52 if (!quiet) printf("%s is %sa mountpoint\n", toys.optargs[0], res ? "" : "not ");
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53 if (toys.optflags & 0x2)
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54 printf("%u:%u\n", major(st1.st_dev), minor(st1.st_dev));
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55 toys.exitval = res ? 0 : 1;
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56 }