1 /* $OpenBSD: ffs_df.c,v 1.14 2014/05/16 13:44:09 krw 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/param.h> 38 #include <sys/mount.h> 39 #include <ufs/ufs/dinode.h> 40 #include <ufs/ffs/fs.h> 41 42 #include <unistd.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <fcntl.h> 46 47 int ffs_df(int, char *, struct statfs *); 48 49 extern int bread(int, off_t, void *, int); 50 extern char *getmntpt(char *); 51 52 static union { 53 struct fs iu_fs; 54 char dummy[SBSIZE]; 55 } sb; 56 #define sblock sb.iu_fs 57 58 int 59 ffs_df(int rfd, char *file, struct statfs *sfsp) 60 { 61 char *mntpt; 62 63 if (!((bread(rfd, (off_t)SBLOCK_UFS1, &sblock, SBSIZE) == 1 && 64 sblock.fs_magic == FS_UFS1_MAGIC) || 65 (bread(rfd, (off_t)SBLOCK_UFS2, &sblock, SBSIZE) == 1 && 66 sblock.fs_magic == FS_UFS2_MAGIC))) { 67 return (-1); 68 } 69 70 sfsp->f_flags = 0; 71 sfsp->f_bsize = sblock.fs_fsize; 72 sfsp->f_iosize = sblock.fs_bsize; 73 if (sblock.fs_magic == FS_UFS1_MAGIC) { 74 sfsp->f_blocks = sblock.fs_ffs1_dsize; 75 sfsp->f_bfree = sblock.fs_ffs1_cstotal.cs_nbfree * 76 sblock.fs_frag + sblock.fs_ffs1_cstotal.cs_nffree; 77 sfsp->f_bavail = sfsp->f_bfree - 78 ((int64_t)sblock.fs_ffs1_dsize * sblock.fs_minfree / 100); 79 sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg - ROOTINO; 80 sfsp->f_ffree = sblock.fs_ffs1_cstotal.cs_nifree; 81 } else { 82 sfsp->f_blocks = sblock.fs_dsize; 83 sfsp->f_bfree = sblock.fs_cstotal.cs_nbfree * 84 sblock.fs_frag + sblock.fs_cstotal.cs_nffree; 85 sfsp->f_bavail = sfsp->f_bfree - 86 ((int64_t)sblock.fs_dsize * sblock.fs_minfree / 100); 87 sfsp->f_files = sblock.fs_ncg * sblock.fs_ipg - ROOTINO; 88 sfsp->f_ffree = sblock.fs_cstotal.cs_nifree; 89 } 90 sfsp->f_fsid.val[0] = 0; 91 sfsp->f_fsid.val[1] = 0; 92 if ((mntpt = getmntpt(file)) == 0) 93 mntpt = ""; 94 memmove(&sfsp->f_mntonname[0], mntpt, MNAMELEN); 95 memmove(&sfsp->f_mntfromname[0], file, MNAMELEN); 96 strlcpy(sfsp->f_fstypename, MOUNT_FFS, MFSNAMELEN); 97 return (0); 98 } 99