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/* Return info on filesystem.
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Bruno Haible <bruno@clisp.org>, 2002.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sys/ustat.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
int
ustat (dev_t dev, struct ustat *ubuf)
{
int mntcount;
struct statfs *mntlist;
/* Search for the device among the f_mntfromname fields of all mounted
filesystems. */
mntcount = __getmntinfo (&mntlist, 0);
if (mntcount == 0 && errno != 0)
return -1;
if (mntcount > 0)
{
int i;
for (i = 0; i < mntcount; i++)
{
struct statfs *mnt = &mntlist[i];
struct stat statbuf;
if ((__strnlen (mnt->f_mntfromname, sizeof (mnt->f_mntfromname))
< sizeof (mnt->f_mntfromname))
&& __xstat (_STAT_VER, mnt->f_mntfromname, &statbuf) >= 0
&& S_ISBLK (statbuf.st_mode)
&& statbuf.st_rdev == dev)
{
/* Found the device. Now produce the result. */
memset (ubuf, '\0', sizeof (struct ustat));
ubuf->f_tfree = mnt->f_bfree;
ubuf->f_tinode = mnt->f_ffree;
return 0;
}
}
}
/* DEV is not among the mounted devices. */
__set_errno (EINVAL);
return -1;
}
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