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/* getmountlist.c - Get a linked list of mount points, with stat information.
*
* Copyright 2006 Rob Landley <rob@landley.net>
*/
#include "toys.h"
#include <mntent.h>
// Get list of mounted filesystems, including stat and statvfs info.
// Returns a reversed list, which is good for finding overmounts and such.
struct mtab_list *xgetmountlist(char *path)
{
struct mtab_list *mtlist = 0, *mt;
struct mntent *me;
FILE *fp;
char *p = path ? path : "/proc/mounts";
if (!(fp = setmntent(p, "r"))) perror_exit("bad %s", p);
// The "test" part of the loop is done before the first time through and
// again after each "increment", so putting the actual load there avoids
// duplicating it. If the load was NULL, the loop stops.
while ((me = getmntent(fp))) {
mt = xzalloc(sizeof(struct mtab_list) + strlen(me->mnt_fsname) +
strlen(me->mnt_dir) + strlen(me->mnt_type) + strlen(me->mnt_opts) + 4);
dlist_add_nomalloc((void *)&mtlist, (void *)mt);
// Collect details about mounted filesystem
// Don't report errors, just leave data zeroed
if (!path) {
stat(me->mnt_dir, &(mt->stat));
statvfs(me->mnt_dir, &(mt->statvfs));
}
// Remember information from /proc/mounts
mt->dir = stpcpy(mt->type, me->mnt_type)+1;
mt->device = stpcpy(mt->dir, me->mnt_dir)+1;
mt->opts = stpcpy(mt->device, me->mnt_fsname)+1;
strcpy(mt->opts, me->mnt_opts);
}
endmntent(fp);
return mtlist;
}
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