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annotate lib/getmountlist.c @ 1215:4eaac3e63fa7 draft

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Cleanup freeramdisk: tabs to 2 spaces, square brackets for option name, do optional cleanup under if (CFG_TOYBOX_FREE) guard.
author Rob Landley <rob@landley.net>
date Sun, 09 Mar 2014 14:38:51 -0500
parents 11cf9b97fae7
children b2cc738d3cfc
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1 /* getmountlist.c - Get a linked list of mount points, with stat information.
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2 *
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3 * Copyright 2006 Rob Landley <rob@landley.net>
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4 */
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6 #include "toys.h"
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7
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8 #include <mntent.h>
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9
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10 // Get list of mounted filesystems, including stat and statvfs info.
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11 // Returns a reversed list, which is good for finding overmounts and such.
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13 struct mtab_list *xgetmountlist(char *path)
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14 {
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15 struct mtab_list *mtlist, *mt;
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16 struct mntent *me;
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17 FILE *fp;
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19 if (!path) path = "/proc/mounts";
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20 if (!(fp = setmntent(path, "r"))) perror_exit("bad %s", path);
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21
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22 // The "test" part of the loop is done before the first time through and
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23 // again after each "increment", so putting the actual load there avoids
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24 // duplicating it. If the load was NULL, the loop stops.
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25
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26 for (mtlist = 0; (me = getmntent(fp)); mtlist = mt) {
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27 mt = xzalloc(sizeof(struct mtab_list) + strlen(me->mnt_fsname) +
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28 strlen(me->mnt_dir) + strlen(me->mnt_type) + 3);
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29 mt->next = mtlist;
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30
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31 // Collect details about mounted filesystem (don't bother for /etc/fstab).
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32 stat(me->mnt_dir, &(mt->stat));
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33 statvfs(me->mnt_dir, &(mt->statvfs));
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34
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35 // Remember information from /proc/mounts
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36 mt->dir = stpcpy(mt->type, me->mnt_type) + 1;
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37 mt->device = stpcpy(mt->dir, me->mnt_dir) + 1;
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38 strcpy(mt->device, me->mnt_fsname);
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39 }
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40 endmntent(fp);
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42 return mtlist;
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43 }