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/* $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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} |