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96 lines
3.7 KiB
C
96 lines
3.7 KiB
C
/* $OpenBSD: ffs_df.c,v 1.19 2016/03/01 17:57:49 mmcc Exp $ */
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/*
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* Copyright (c) 1980, 1990, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <sys/mount.h>
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#include <ufs/ffs/fs.h>
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#include <ufs/ufs/dinode.h>
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#include <string.h>
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int ffs_df(int, char *, struct statfs *);
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extern int bread(int, off_t, void *, int);
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extern char *getmntpt(char *);
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static union {
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struct fs iu_fs;
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char dummy[SBSIZE];
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} sb;
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#define sblock sb.iu_fs
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int
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ffs_df(int rfd, char *file, struct statfs *sfsp)
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{
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char *mntpt;
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if (!((bread(rfd, (off_t)SBLOCK_UFS1, &sblock, SBSIZE) == 1 &&
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sblock.fs_magic == FS_UFS1_MAGIC) ||
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(bread(rfd, (off_t)SBLOCK_UFS2, &sblock, SBSIZE) == 1 &&
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sblock.fs_magic == FS_UFS2_MAGIC))) {
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return (-1);
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}
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sfsp->f_flags = 0;
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sfsp->f_bsize = sblock.fs_fsize;
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sfsp->f_iosize = sblock.fs_bsize;
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if (sblock.fs_magic == FS_UFS1_MAGIC) {
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sfsp->f_blocks = sblock.fs_ffs1_dsize;
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sfsp->f_bfree = sblock.fs_ffs1_cstotal.cs_nbfree *
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sblock.fs_frag + sblock.fs_ffs1_cstotal.cs_nffree;
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sfsp->f_bavail = sfsp->f_bfree -
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((int64_t)sblock.fs_ffs1_dsize * sblock.fs_minfree / 100);
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sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg - ROOTINO;
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sfsp->f_ffree = sblock.fs_ffs1_cstotal.cs_nifree;
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} else {
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sfsp->f_blocks = sblock.fs_dsize;
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sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree *
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sblock.fs_frag + sblock.fs_cstotal.cs_nffree;
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sfsp->f_bavail = sfsp->f_bfree -
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((int64_t)sblock.fs_dsize * sblock.fs_minfree / 100);
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sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg - ROOTINO;
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sfsp->f_ffree = sblock.fs_cstotal.cs_nifree;
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}
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sfsp->f_fsid.val[0] = 0;
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sfsp->f_fsid.val[1] = 0;
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if ((mntpt = getmntpt(file)) == 0)
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mntpt = "";
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strlcpy(sfsp->f_mntonname, mntpt, sizeof(sfsp->f_mntonname));
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strlcpy(sfsp->f_mntfromname, file, sizeof(sfsp->f_mntfromname));
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strlcpy(sfsp->f_fstypename, MOUNT_EXT2FS, sizeof(sfsp->f_fstypename));
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return (0);
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}
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