mirror of
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236 lines
6.5 KiB
C
236 lines
6.5 KiB
C
/* fsusage.c -- return space usage of mounted filesystems
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Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#ifdef HAVE_CONFIG_H
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#if defined (CONFIG_BROKETS)
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/* We use <config.h> instead of "config.h" so that a compilation
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using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
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(which it would do because it found this file in $srcdir). */
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#include <config.h>
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#else
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#include "config.h"
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#endif
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#endif
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#include <sys/types.h>
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#include "fsusage.h"
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int statfs ();
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#if defined (STAT_STATFS3_OSF1) /* DEC Alpha running OSF/1 */
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# include <sys/mount.h>
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#endif
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#if defined(STAT_STATFS2_BSIZE) && !defined(_IBMR2) /* 4.3BSD, SunOS 4, HP-UX, AIX PS/2. */
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#include <sys/vfs.h>
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#endif
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#ifdef STAT_STATFS2_FSIZE /* 4.4BSD. */
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#include <sys/mount.h>
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#endif
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#ifdef STAT_STATFS2_FS_DATA /* Ultrix. */
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#include <sys/param.h>
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#include <sys/mount.h>
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#endif
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#ifdef STAT_READ /* SVR2. */
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#include <sys/param.h>
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#include <sys/filsys.h>
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#include <fcntl.h>
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#endif
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#if defined(STAT_STATFS4) || (defined(_AIX) && defined(_IBMR2)) /* SVR3, Dynix, Irix, AIX RS6000. */
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#include <sys/statfs.h>
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#endif
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#if defined(_AIX) && defined(_I386) /* AIX PS/2. */
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#include <sys/stat.h>
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#include <sys/dustat.h>
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#endif
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#ifdef STAT_STATVFS /* SVR4. */
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#include <sys/statvfs.h>
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int statvfs ();
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#endif
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/* Set B_NEW to the number of TOSIZE-byte blocks used by B FROMSIZE-byte
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blocks, rounding away from zero. TOSIZE must be positive. Return -1
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from invoking function if FROMSIZE is not positive. */
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#define ADJUST_BLOCKS(b_new, b, fromsize, tosize) \
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do \
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{ \
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if ((tosize) <= 0) \
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abort (); \
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if ((fromsize) <= 0) \
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return -1; \
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\
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if ((fromsize) == (tosize)) /* E.g., from 512 to 512. */ \
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(b_new) = (b); \
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else if ((fromsize) > (tosize)) /* E.g., from 2048 to 512. */ \
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(b_new) = (b) * ((fromsize) / (tosize)); \
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else /* E.g., from 256 to 512. */ \
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(b_new) = ((b) + ((b) < 0 ? -1 : 1)) / ((tosize) / (fromsize)); \
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} \
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while (0)
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/* Fill in the fields of FSP with information about space usage for
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the filesystem on which PATH resides.
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DISK is the device on which PATH is mounted, for space-getting
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methods that need to know it.
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Return 0 if successful, -1 if not. */
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int
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get_fs_usage (path, disk, fsp)
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char *path, *disk;
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struct fs_usage *fsp;
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{
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#if defined (STAT_STATFS3_OSF1)
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struct statfs fsd;
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if (statfs (path, &fsd, sizeof (struct statfs)) != 0)
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return (-1);
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#define CONVERT_BLOCKS(bnew, b) ADJUST_BLOCKS ((bnew), (b), fsd.f_fsize, 512)
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#endif /* STAT_STATFS3_OSF1 */
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#ifdef STAT_STATFS2_FS_DATA /* Ultrix. */
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struct fs_data fsd;
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if (statfs (path, &fsd) != 1)
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return -1;
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#define CONVERT_BLOCKS(bnew, b) ADJUST_BLOCKS ((bnew), (b), 1024, 512)
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CONVERT_BLOCKS (fsp->fsu_blocks, fsd.fd_req.btot);
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CONVERT_BLOCKS (fsp->fsu_bfree, fsd.fd_req.bfree);
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CONVERT_BLOCKS (fsp->fsu_bavail, fsd.fd_req.bfreen);
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fsp->fsu_files = fsd.fd_req.gtot;
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fsp->fsu_ffree = fsd.fd_req.gfree;
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#endif
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#ifdef STAT_READ /* SVR2. */
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#ifndef SUPERBOFF
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#define SUPERBOFF (SUPERB * 512)
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#endif
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struct filsys fsd;
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int fd;
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fd = open (disk, O_RDONLY);
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if (fd < 0)
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return -1;
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lseek (fd, (long) SUPERBOFF, 0);
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if (read (fd, (char *) &fsd, sizeof fsd) != sizeof fsd)
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{
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close (fd);
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return -1;
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}
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close (fd);
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#define CONVERT_BLOCKS(bnew, b) \
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ADJUST_BLOCKS ((bnew), (b), (fsd.s_type == Fs2b ? 1024 : 512), 512)
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CONVERT_BLOCKS (fsp->fsu_blocks, fsd.s_fsize);
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CONVERT_BLOCKS (fsp->fsu_bfree, fsd.s_tfree);
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CONVERT_BLOCKS (fsp->fsu_bavail, fsd.s_tfree);
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fsp->fsu_files = (fsd.s_isize - 2) * INOPB * (fsd.s_type == Fs2b ? 2 : 1);
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fsp->fsu_ffree = fsd.s_tinode;
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#endif
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#ifdef STAT_STATFS2_BSIZE /* 4.3BSD, SunOS 4, HP-UX, AIX. */
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struct statfs fsd;
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if (statfs (path, &fsd) < 0)
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return -1;
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#define CONVERT_BLOCKS(bnew, b) ADJUST_BLOCKS ((bnew), (b), fsd.f_bsize, 512)
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#endif
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#ifdef STAT_STATFS2_FSIZE /* 4.4BSD. */
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struct statfs fsd;
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if (statfs (path, &fsd) < 0)
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return -1;
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#define CONVERT_BLOCKS(bnew, b) ADJUST_BLOCKS ((bnew), (b), fsd.f_fsize, 512)
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#endif
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#ifdef STAT_STATFS4 /* SVR3, Dynix, Irix. */
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struct statfs fsd;
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if (statfs (path, &fsd, sizeof fsd, 0) < 0)
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return -1;
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/* Empirically, the block counts on most SVR3 and SVR3-derived
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systems seem to always be in terms of 512-byte blocks,
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no matter what value f_bsize has. */
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#define CONVERT_BLOCKS(bnew, b) \
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do \
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{ \
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(bnew) = (b); \
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} \
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while (0)
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#ifndef _SEQUENT_ /* _SEQUENT_ is DYNIX/ptx. */
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#ifndef DOLPHIN /* DOLPHIN 3.8.alfa/7.18 has f_bavail */
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#define f_bavail f_bfree
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#endif
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#endif
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#endif
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#ifdef STAT_STATVFS /* SVR4. */
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struct statvfs fsd;
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if (statvfs (path, &fsd) < 0)
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return -1;
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/* f_frsize isn't guaranteed to be supported. */
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#define CONVERT_BLOCKS(bnew, b) \
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ADJUST_BLOCKS ((bnew), (b), fsd.f_frsize ? fsd.f_frsize : fsd.f_bsize, 512)
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#endif
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#if !defined(STAT_STATFS2_FS_DATA) && !defined(STAT_READ) /* !Ultrix && !SVR2. */
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CONVERT_BLOCKS (fsp->fsu_blocks, fsd.f_blocks);
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CONVERT_BLOCKS (fsp->fsu_bfree, fsd.f_bfree);
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CONVERT_BLOCKS (fsp->fsu_bavail, fsd.f_bavail);
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fsp->fsu_files = fsd.f_files;
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fsp->fsu_ffree = fsd.f_ffree;
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#endif
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return 0;
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}
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#if defined(_AIX) && defined(_I386)
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/* AIX PS/2 does not supply statfs. */
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int
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statfs (path, fsb)
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char *path;
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struct statfs *fsb;
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{
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struct stat stats;
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struct dustat fsd;
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if (stat (path, &stats))
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return -1;
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if (dustat (stats.st_dev, 0, &fsd, sizeof (fsd)))
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return -1;
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fsb->f_type = 0;
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fsb->f_bsize = fsd.du_bsize;
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fsb->f_blocks = fsd.du_fsize - fsd.du_isize;
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fsb->f_bfree = fsd.du_tfree;
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fsb->f_bavail = fsd.du_tfree;
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fsb->f_files = (fsd.du_isize - 2) * fsd.du_inopb;
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fsb->f_ffree = fsd.du_tinode;
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fsb->f_fsid.val[0] = fsd.du_site;
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fsb->f_fsid.val[1] = fsd.du_pckno;
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return 0;
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}
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#endif /* _AIX && _I386 */
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