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. */
59 #define adjust_blocks(blocks, fromsize, tosize) \
60 (((fromsize) == (tosize)) \
61 ? (blocks) /* E.g., from 512 to 512. */ \
62 : (((fromsize) > (tosize)) \
63 /* E.g., from 2048 to 512. */ \
64 ? (blocks) * ((fromsize) / (tosize)) \
65 /* E.g., from 256 to 512. */ \
66 : ((blocks) + 1) / ((tosize) / (fromsize))))
68 /* Fill in the fields of FSP with information about space usage for
69 the filesystem on which PATH resides.
70 DISK is the device on which PATH is mounted, for space-getting
71 methods that need to know it.
72 Return 0 if successful, -1 if not. */
75 get_fs_usage (path, disk, fsp)
79 #ifdef STAT_STATFS2_FS_DATA /* Ultrix. */
82 if (statfs (path, &fsd) != 1)
84 #define convert_blocks(b) adjust_blocks ((b), 1024, 512)
85 fsp->fsu_blocks = convert_blocks (fsd.fd_req.btot);
86 fsp->fsu_bfree = convert_blocks (fsd.fd_req.bfree);
87 fsp->fsu_bavail = convert_blocks (fsd.fd_req.bfreen);
88 fsp->fsu_files = fsd.fd_req.gtot;
89 fsp->fsu_ffree = fsd.fd_req.gfree;
92 #ifdef STAT_READ /* SVR2. */
94 #define SUPERBOFF (SUPERB * 512)
99 fd = open (disk, O_RDONLY);
102 lseek (fd, (long) SUPERBOFF, 0);
103 if (read (fd, (char *) &fsd, sizeof fsd) != sizeof fsd)
109 #define convert_blocks(b) adjust_blocks ((b), (fsd.s_type == Fs2b ? 1024 : 512), 512)
110 fsp->fsu_blocks = convert_blocks (fsd.s_fsize);
111 fsp->fsu_bfree = convert_blocks (fsd.s_tfree);
112 fsp->fsu_bavail = convert_blocks (fsd.s_tfree);
113 fsp->fsu_files = (fsd.s_isize - 2) * INOPB * (fsd.s_type == Fs2b ? 2 : 1);
114 fsp->fsu_ffree = fsd.s_tinode;
117 #ifdef STAT_STATFS2_BSIZE /* 4.3BSD, SunOS 4, HP-UX, AIX. */
120 if (statfs (path, &fsd) < 0)
122 #define convert_blocks(b) adjust_blocks ((b), fsd.f_bsize, 512)
125 #ifdef STAT_STATFS2_FSIZE /* 4.4BSD. */
128 if (statfs (path, &fsd) < 0)
130 #define convert_blocks(b) adjust_blocks ((b), fsd.f_fsize, 512)
133 #ifdef STAT_STATFS4 /* SVR3, Dynix, Irix. */
136 if (statfs (path, &fsd, sizeof fsd, 0) < 0)
138 /* Empirically, the block counts on most SVR3 and SVR3-derived
139 systems seem to always be in terms of 512-byte blocks,
140 no matter what value f_bsize has. */
141 #define convert_blocks(b) (b)
142 #ifndef _SEQUENT_ /* _SEQUENT_ is DYNIX/ptx. */
143 #define f_bavail f_bfree
147 #ifdef STAT_STATVFS /* SVR4. */
150 if (statvfs (path, &fsd) < 0)
152 /* f_frsize isn't guaranteed to be supported. */
153 #define convert_blocks(b) \
154 adjust_blocks ((b), fsd.f_frsize ? fsd.f_frsize : fsd.f_bsize, 512)
157 #if !defined(STAT_STATFS2_FS_DATA) && !defined(STAT_READ) /* !Ultrix && !SVR2. */
158 fsp->fsu_blocks = convert_blocks (fsd.f_blocks);
159 fsp->fsu_bfree = convert_blocks (fsd.f_bfree);
160 fsp->fsu_bavail = convert_blocks (fsd.f_bavail);
161 fsp->fsu_files = fsd.f_files;
162 fsp->fsu_ffree = fsd.f_ffree;
168 #if defined(_AIX) && defined(_I386)
169 /* AIX PS/2 does not supply statfs. */
179 if (stat (path, &stats))
181 if (dustat (stats.st_dev, 0, &fsd, sizeof (fsd)))
184 fsb->f_bsize = fsd.du_bsize;
185 fsb->f_blocks = fsd.du_fsize - fsd.du_isize;
186 fsb->f_bfree = fsd.du_tfree;
187 fsb->f_bavail = fsd.du_tfree;
188 fsb->f_files = (fsd.du_isize - 2) * fsd.du_inopb;
189 fsb->f_ffree = fsd.du_tinode;
190 fsb->f_fsid.val[0] = fsd.du_site;
191 fsb->f_fsid.val[1] = fsd.du_pckno;
194 #endif /* _AIX && _I386 */