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/* $OpenBSD: ffs_df.c,v 1.13 2009/10/27 23:59:21 deraadt Exp $ */
/*
* Copyright (c) 1980, 1990, 1993, 1994
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/mount.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
int ffs_df(int, char *, struct statfs *);
extern int bread(int, off_t, void *, int);
extern char *getmntpt(char *);
static union {
struct fs iu_fs;
char dummy[SBSIZE];
} sb;
#define sblock sb.iu_fs
int
ffs_df(int rfd, char *file, struct statfs *sfsp)
{
char *mntpt;
if (!((bread(rfd, (off_t)SBLOCK_UFS1, &sblock, SBSIZE) == 1 &&
sblock.fs_magic == FS_UFS1_MAGIC) ||
(bread(rfd, (off_t)SBLOCK_UFS2, &sblock, SBSIZE) == 1 &&
sblock.fs_magic == FS_UFS2_MAGIC))) {
return (-1);
}
sfsp->f_flags = 0;
sfsp->f_bsize = sblock.fs_fsize;
sfsp->f_iosize = sblock.fs_bsize;
if (sblock.fs_magic == FS_UFS1_MAGIC) {
sfsp->f_blocks = sblock.fs_ffs1_dsize;
sfsp->f_bfree = sblock.fs_ffs1_cstotal.cs_nbfree *
sblock.fs_frag + sblock.fs_ffs1_cstotal.cs_nffree;
sfsp->f_bavail = ((int64_t)sblock.fs_ffs1_dsize * (100 -
sblock.fs_minfree) / 100) - (sblock.fs_ffs1_dsize -
sfsp->f_bfree);
sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg - ROOTINO;
sfsp->f_ffree = sblock.fs_ffs1_cstotal.cs_nifree;
} else {
sfsp->f_blocks = sblock.fs_dsize;
sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree *
sblock.fs_frag + sblock.fs_cstotal.cs_nffree;
sfsp->f_bavail = (sblock.fs_dsize * (100 - sblock.fs_minfree) /
100) - (sblock.fs_dsize - sfsp->f_bfree);
sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg - ROOTINO;
sfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
}
sfsp->f_fsid.val[0] = 0;
sfsp->f_fsid.val[1] = 0;
if ((mntpt = getmntpt(file)) == 0)
mntpt = "";
memmove(&sfsp->f_mntonname[0], mntpt, MNAMELEN);
memmove(&sfsp->f_mntfromname[0], file, MNAMELEN);
strlcpy(sfsp->f_fstypename, MOUNT_FFS, MFSNAMELEN);
return (0);
}
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