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