1 /* $OpenBSD: ffs_df.c,v 1.19 2016/03/01 17:57:49 mmcc Exp $ */ 2 3 /* 4 * Copyright (c) 1980, 1990, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/types.h> 38 #include <sys/mount.h> 39 #include <ufs/ffs/fs.h> 40 #include <ufs/ufs/dinode.h> 41 42 #include <string.h> 43 44 int ffs_df(int, char *, struct statfs *); 45 46 extern int bread(int, off_t, void *, int); 47 extern char *getmntpt(char *); 48 49 static union { 50 struct fs iu_fs; 51 char dummy[SBSIZE]; 52 } sb; 53 #define sblock sb.iu_fs 54 55 int 56 ffs_df(int rfd, char *file, struct statfs *sfsp) 57 { 58 char *mntpt; 59 60 if (!((bread(rfd, (off_t)SBLOCK_UFS1, &sblock, SBSIZE) == 1 && 61 sblock.fs_magic == FS_UFS1_MAGIC) || 62 (bread(rfd, (off_t)SBLOCK_UFS2, &sblock, SBSIZE) == 1 && 63 sblock.fs_magic == FS_UFS2_MAGIC))) { 64 return (-1); 65 } 66 67 sfsp->f_flags = 0; 68 sfsp->f_bsize = sblock.fs_fsize; 69 sfsp->f_iosize = sblock.fs_bsize; 70 if (sblock.fs_magic == FS_UFS1_MAGIC) { 71 sfsp->f_blocks = sblock.fs_ffs1_dsize; 72 sfsp->f_bfree = sblock.fs_ffs1_cstotal.cs_nbfree * 73 sblock.fs_frag + sblock.fs_ffs1_cstotal.cs_nffree; 74 sfsp->f_bavail = sfsp->f_bfree - 75 ((int64_t)sblock.fs_ffs1_dsize * sblock.fs_minfree / 100); 76 sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg - ROOTINO; 77 sfsp->f_ffree = sblock.fs_ffs1_cstotal.cs_nifree; 78 } else { 79 sfsp->f_blocks = sblock.fs_dsize; 80 sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * 81 sblock.fs_frag + sblock.fs_cstotal.cs_nffree; 82 sfsp->f_bavail = sfsp->f_bfree - 83 ((int64_t)sblock.fs_dsize * sblock.fs_minfree / 100); 84 sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg - ROOTINO; 85 sfsp->f_ffree = sblock.fs_cstotal.cs_nifree; 86 } 87 sfsp->f_fsid.val[0] = 0; 88 sfsp->f_fsid.val[1] = 0; 89 if ((mntpt = getmntpt(file)) == 0) 90 mntpt = ""; 91 strlcpy(sfsp->f_mntonname, mntpt, sizeof(sfsp->f_mntonname)); 92 strlcpy(sfsp->f_mntfromname, file, sizeof(sfsp->f_mntfromname)); 93 strlcpy(sfsp->f_fstypename, MOUNT_EXT2FS, sizeof(sfsp->f_fstypename)); 94 return (0); 95 } 96