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. */
18 #include <sys/types.h>
23 #if defined(STAT_STATFS2_BSIZE) && !defined(_IBMR2) /* 4.3BSD, SunOS 4, HP-UX, AIX PS/2. */
27 #ifdef STAT_STATFS2_FSIZE /* 4.4BSD. */
28 #include <sys/mount.h>
31 #ifdef STAT_STATFS2_FS_DATA /* Ultrix. */
32 #include <sys/param.h>
33 #include <sys/mount.h>
36 #ifdef STAT_READ /* SVR2. */
37 #include <sys/param.h>
38 #include <sys/filsys.h>
42 #if defined(STAT_STATFS4) || (defined(_AIX) && defined(_IBMR2)) /* SVR3, Dynix, Irix, AIX RS6000. */
43 #include <sys/statfs.h>
46 #if defined(_AIX) && defined(_I386) /* AIX PS/2. */
48 #include <sys/dustat.h>
51 #ifdef STAT_STATVFS /* SVR4. */
52 #include <sys/statvfs.h>
56 /* Return the number of TOSIZE-byte blocks used by
57 BLOCKS FROMSIZE-byte blocks, rounding up. */
60 adjust_blocks (blocks, fromsize, tosize)
64 if (fromsize == tosize) /* E.g., from 512 to 512. */
66 else if (fromsize > tosize) /* E.g., from 2048 to 512. */
67 return blocks * (fromsize / tosize);
68 else /* E.g., from 256 to 512. */
69 return (blocks + 1) / (tosize / fromsize);
72 /* Fill in the fields of FSP with information about space usage for
73 the filesystem on which PATH resides.
74 DISK is the device on which PATH is mounted, for space-getting
75 methods that need to know it.
76 Return 0 if successful, -1 if not. */
79 get_fs_usage (path, disk, fsp)
83 #ifdef STAT_STATFS2_FS_DATA /* Ultrix. */
86 if (statfs (path, &fsd) != 1)
88 #define convert_blocks(b) adjust_blocks ((b), 1024, 512)
89 fsp->fsu_blocks = convert_blocks (fsd.fd_req.btot);
90 fsp->fsu_bfree = convert_blocks (fsd.fd_req.bfree);
91 fsp->fsu_bavail = convert_blocks (fsd.fd_req.bfreen);
92 fsp->fsu_files = fsd.fd_req.gtot;
93 fsp->fsu_ffree = fsd.fd_req.gfree;
96 #ifdef STAT_READ /* SVR2. */
98 #define SUPERBOFF (SUPERB * 512)
103 fd = open (disk, O_RDONLY);
106 lseek (fd, (long) SUPERBOFF, 0);
107 if (read (fd, (char *) &fsd, sizeof fsd) != sizeof fsd)
113 #define convert_blocks(b) adjust_blocks ((b), (fsd.s_type == Fs2b ? 1024 : 512), 512)
114 fsp->fsu_blocks = convert_blocks (fsd.s_fsize);
115 fsp->fsu_bfree = convert_blocks (fsd.s_tfree);
116 fsp->fsu_bavail = convert_blocks (fsd.s_tfree);
117 fsp->fsu_files = (fsd.s_isize - 2) * INOPB * (fsd.s_type == Fs2b ? 2 : 1);
118 fsp->fsu_ffree = fsd.s_tinode;
121 #ifdef STAT_STATFS2_BSIZE /* 4.3BSD, SunOS 4, HP-UX, AIX. */
124 if (statfs (path, &fsd) < 0)
126 #define convert_blocks(b) adjust_blocks ((b), fsd.f_bsize, 512)
129 #ifdef STAT_STATFS2_FSIZE /* 4.4BSD. */
132 if (statfs (path, &fsd) < 0)
134 #define convert_blocks(b) adjust_blocks ((b), fsd.f_fsize, 512)
137 #ifdef STAT_STATFS4 /* SVR3, Dynix, Irix. */
140 if (statfs (path, &fsd, sizeof fsd, 0) < 0)
142 /* Empirically, the block counts on most SVR3 and SVR3-derived
143 systems seem to always be in terms of 512-byte blocks,
144 no matter what value f_bsize has. */
145 #define convert_blocks(b) (b)
146 #ifndef _SEQUENT_ /* _SEQUENT_ is DYNIX/ptx. */
147 #define f_bavail f_bfree
151 #ifdef STAT_STATVFS /* SVR4. */
154 if (statvfs (path, &fsd) < 0)
156 /* f_frsize isn't guaranteed to be supported. */
157 #define convert_blocks(b) \
158 adjust_blocks ((b), fsd.f_frsize ? fsd.f_frsize : fsd.f_bsize, 512)
161 #if !defined(STAT_STATFS2_FS_DATA) && !defined(STAT_READ) /* !Ultrix && !SVR2. */
162 fsp->fsu_blocks = convert_blocks (fsd.f_blocks);
163 fsp->fsu_bfree = convert_blocks (fsd.f_bfree);
164 fsp->fsu_bavail = convert_blocks (fsd.f_bavail);
165 fsp->fsu_files = fsd.f_files;
166 fsp->fsu_ffree = fsd.f_ffree;
172 #if defined(_AIX) && defined(_I386)
173 /* AIX PS/2 does not supply statfs. */
183 if (stat (path, &stats))
185 if (dustat (stats.st_dev, 0, &fsd, sizeof (fsd)))
188 fsb->f_bsize = fsd.du_bsize;
189 fsb->f_blocks = fsd.du_fsize - fsd.du_isize;
190 fsb->f_bfree = fsd.du_tfree;
191 fsb->f_bavail = fsd.du_tfree;
192 fsb->f_files = (fsd.du_isize - 2) * fsd.du_inopb;
193 fsb->f_ffree = fsd.du_tinode;
194 fsb->f_fsid.val[0] = fsd.du_site;
195 fsb->f_fsid.val[1] = fsd.du_pckno;
198 #endif /* _AIX && _I386 */