1 /* fsusage.c -- return space usage of mounted filesystems
2 Copyright (C) 1991, 1992 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #include <sys/types.h>
25 #include "safe-stat.h"
29 #ifdef HAVE_SYS_PARAM_H
30 #include <sys/param.h>
33 #ifdef HAVE_SYS_MOUNT_H
34 #include <sys/mount.h>
41 #ifdef HAVE_SYS_FILSYS_H
42 #include <sys/filsys.h> /* SVR2. */
49 #ifdef HAVE_SYS_STATFS_H
50 #include <sys/statfs.h>
53 #ifdef HAVE_DUSTAT_H /* AIX PS/2. */
54 #include <sys/dustat.h>
57 #ifdef HAVE_SYS_STATVFS_H /* SVR4. */
58 #include <sys/statvfs.h>
62 /* Return the number of TOSIZE-byte blocks used by
63 BLOCKS FROMSIZE-byte blocks, rounding away from zero.
64 TOSIZE must be positive. Return -1 if FROMSIZE is not positive. */
67 adjust_blocks (blocks, fromsize, tosize)
76 if (fromsize == tosize) /* E.g., from 512 to 512. */
78 else if (fromsize > tosize) /* E.g., from 2048 to 512. */
79 return blocks * (fromsize / tosize);
80 else /* E.g., from 256 to 512. */
81 return (blocks + (blocks < 0 ? -1 : 1)) / (tosize / fromsize);
84 /* Fill in the fields of FSP with information about space usage for
85 the filesystem on which PATH resides.
86 DISK is the device on which PATH is mounted, for space-getting
87 methods that need to know it.
88 Return 0 if successful, -1 if not. */
91 get_fs_usage (path, disk, fsp)
95 #if defined (STAT_STATFS3_OSF1)
98 if (statfs (path, &fsd, sizeof (struct statfs)) != 0)
100 #define CONVERT_BLOCKS(b) adjust_blocks ((b), fsd.f_fsize, 512)
101 #endif /* STAT_STATFS3_OSF1 */
103 #ifdef STAT_STATFS2_FS_DATA /* Ultrix. */
106 if (statfs (path, &fsd) != 1)
108 #define CONVERT_BLOCKS(b) adjust_blocks ((b), 1024, 512)
109 fsp->fsu_blocks = CONVERT_BLOCKS (fsd.fd_req.btot);
110 fsp->fsu_bfree = CONVERT_BLOCKS (fsd.fd_req.bfree);
111 fsp->fsu_bavail = CONVERT_BLOCKS (fsd.fd_req.bfreen);
112 fsp->fsu_files = fsd.fd_req.gtot;
113 fsp->fsu_ffree = fsd.fd_req.gfree;
116 #ifdef STAT_READ_FILSYS /* SVR2. */
118 #define SUPERBOFF (SUPERB * 512)
123 fd = open (disk, O_RDONLY);
126 lseek (fd, (long) SUPERBOFF, 0);
127 if (read (fd, (char *) &fsd, sizeof fsd) != sizeof fsd)
133 #define CONVERT_BLOCKS(b) adjust_blocks ((b), (fsd.s_type == Fs2b ? 1024 : 512), 512)
134 fsp->fsu_blocks = CONVERT_BLOCKS (fsd.s_fsize);
135 fsp->fsu_bfree = CONVERT_BLOCKS (fsd.s_tfree);
136 fsp->fsu_bavail = CONVERT_BLOCKS (fsd.s_tfree);
137 fsp->fsu_files = (fsd.s_isize - 2) * INOPB * (fsd.s_type == Fs2b ? 2 : 1);
138 fsp->fsu_ffree = fsd.s_tinode;
141 #ifdef STAT_STATFS2_BSIZE /* 4.3BSD, SunOS 4, HP-UX, AIX. */
144 if (statfs (path, &fsd) < 0)
146 #define CONVERT_BLOCKS(b) adjust_blocks ((b), fsd.f_bsize, 512)
149 #ifdef STAT_STATFS2_FSIZE /* 4.4BSD. */
152 if (statfs (path, &fsd) < 0)
154 #define CONVERT_BLOCKS(b) adjust_blocks ((b), fsd.f_fsize, 512)
157 #ifdef STAT_STATFS4 /* SVR3, Dynix, Irix, AIX. */
160 if (statfs (path, &fsd, sizeof fsd, 0) < 0)
162 /* Empirically, the block counts on most SVR3 and SVR3-derived
163 systems seem to always be in terms of 512-byte blocks,
164 no matter what value f_bsize has. */
166 # define CONVERT_BLOCKS(b) adjust_blocks ((b), fsd.f_bsize, 512)
168 # define CONVERT_BLOCKS(b) (b)
169 # ifndef _SEQUENT_ /* _SEQUENT_ is DYNIX/ptx. */
170 # ifndef DOLPHIN /* DOLPHIN 3.8.alfa/7.18 has f_bavail */
171 # define f_bavail f_bfree
177 #ifdef STAT_STATVFS /* SVR4. */
180 if (statvfs (path, &fsd) < 0)
182 /* f_frsize isn't guaranteed to be supported. */
183 #define CONVERT_BLOCKS(b) \
184 adjust_blocks ((b), fsd.f_frsize ? fsd.f_frsize : fsd.f_bsize, 512)
187 #if !defined(STAT_STATFS2_FS_DATA) && !defined(STAT_READ_FILSYS) /* !Ultrix && !SVR2. */
188 fsp->fsu_blocks = CONVERT_BLOCKS (fsd.f_blocks);
189 fsp->fsu_bfree = CONVERT_BLOCKS (fsd.f_bfree);
190 fsp->fsu_bavail = CONVERT_BLOCKS (fsd.f_bavail);
191 fsp->fsu_files = fsd.f_files;
192 fsp->fsu_ffree = fsd.f_ffree;
198 #if defined(_AIX) && defined(_I386)
199 /* AIX PS/2 does not supply statfs. */
209 if (SAFE_STAT (path, &stats))
211 if (dustat (stats.st_dev, 0, &fsd, sizeof (fsd)))
214 fsb->f_bsize = fsd.du_bsize;
215 fsb->f_blocks = fsd.du_fsize - fsd.du_isize;
216 fsb->f_bfree = fsd.du_tfree;
217 fsb->f_bavail = fsd.du_tfree;
218 fsb->f_files = (fsd.du_isize - 2) * fsd.du_inopb;
219 fsb->f_ffree = fsd.du_tinode;
220 fsb->f_fsid.val[0] = fsd.du_site;
221 fsb->f_fsid.val[1] = fsd.du_pckno;
224 #endif /* _AIX && _I386 */