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
ffs_df(int rfd,char * file,struct statfs * sfsp)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