home *** CD-ROM | disk | FTP | other *** search
- /* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- This file was modified slightly by Ian Lance Taylor, December 1992,
- and again July 1995, for use with Taylor UUCP. */
-
- #include "uucp.h"
- #include "uudefs.h"
- #include "sysdep.h"
- #include "fsusg.h"
-
- int statfs ();
-
- #if HAVE_SYS_PARAM_H
- #include <sys/param.h>
- #endif
-
- #if HAVE_SYS_MOUNT_H
- #include <sys/mount.h>
- #endif
-
- #if HAVE_SYS_VFS_H
- #include <sys/vfs.h>
- #endif
-
- #if HAVE_SYS_FILSYS_H
- #include <sys/filsys.h> /* SVR2. */
- #endif
-
- #if HAVE_FCNTL_H
- #include <fcntl.h>
- #endif
-
- #if HAVE_SYS_STATFS_H
- #include <sys/statfs.h>
- #endif
-
- #if HAVE_SYS_DUSTAT_H /* AIX PS/2. */
- #include <sys/dustat.h>
- #endif
-
- #if HAVE_SYS_STATVFS_H /* SVR4. */
- #include <sys/statvfs.h>
- int statvfs ();
- #endif
-
- #if HAVE_USTAT_H /* SVR2 and others. */
- #include <ustat.h>
- #endif
-
- #if STAT_DISK_SPACE /* QNX. */
- #include <sys/disk.h>
- #include <errno.h>
- #endif
-
- #define STAT_NONE 0
-
- #if ! STAT_STATFS3_OSF1
- #if ! STAT_STATFS2_FS_DATA
- #if ! STAT_STATFS2_BSIZE
- #if ! STAT_STATFS2_FSIZE
- #if ! STAT_STATFS4
- #if ! STAT_STATVFS
- #if ! STAT_DISK_SPACE
- #if ! STAT_USTAT
- #undef STAT_NONE
- #define STAT_NONE 1
- #endif
- #endif
- #endif
- #endif
- #endif
- #endif
- #endif
- #endif
-
- #if ! STAT_NONE
-
- static long adjust_blocks P((long blocks, int fromsize, int tosize));
-
- /* Return the number of TOSIZE-byte blocks used by
- BLOCKS FROMSIZE-byte blocks, rounding away from zero.
- TOSIZE must be positive. Return -1 if FROMSIZE is not positive. */
-
- static long
- adjust_blocks (blocks, fromsize, tosize)
- long blocks;
- int fromsize, tosize;
- {
- if (tosize <= 0)
- abort ();
- if (fromsize <= 0)
- return -1;
-
- 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);
- }
-
- #endif
-
- /* 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 STAT_NONE
- return -1;
- #endif
-
- #if 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 */
-
- #if STAT_STATFS2_FS_DATA /* Ultrix. */
- struct fs_data fsd;
-
- if (statfs (path, &fsd) != 1)
- return -1;
- #define CONVERT_BLOCKS(b) adjust_blocks ((long) (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
-
- #if 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
-
- #if 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
-
- #if 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. */
- # if _AIX
- # define CONVERT_BLOCKS(b) adjust_blocks ((b), fsd.f_bsize, 512)
- # else
- # 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
- #endif
-
- #if 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 STAT_DISK_SPACE /* QNX. */
- int o;
- int iret;
- long cfree_blocks, ctotal_blocks;
- char *zpath;
- char *zslash;
-
- zpath = zbufcpy (path);
- while ((o = open (zpath, O_RDONLY, 0)) == -1
- && errno == ENOENT)
- {
- /* The named file doesn't exist, so we can't open it. Try the
- directory containing it. */
- if ((strcmp ("/", zpath) == 0)
- || (strcmp (zpath, ".") == 0)
- || (strcmp (zpath, "") == 0)
- /* QNX peculiarity: "//2" means root on node 2 */
- || ((strncmp (zpath, "//", 2) == 0)
- && (strchr (zpath + 2, '/') == NULL)))
- {
- /* We can't shorten this! */
- break;
- }
-
- /* Shorten the pathname by one component and try again. */
- zslash = strrchr (zpath, '/');
- if (zslash == NULL)
- {
- /* Try the current directory. We can open directories. */
- zpath[0] = '.';
- zpath[1] = '\0';
- }
- else if (zslash == zpath)
- {
- /* Try the root directory. */
- zpath[0] = '/';
- zpath[1] = '\0';
- }
- else
- {
- /* Chop off last path component. */
- zslash[0] = '\0';
- }
- }
- if (o == -1)
- {
- ulog (LOG_ERROR, "get_fs_usage: open (%s) failed: %s", zpath,
- strerror (errno));
- ubuffree (zpath);
- return -1;
- }
- ubuffree (zpath);
-
- iret = disk_space (o, &cfree_blocks, &ctotal_blocks);
- (void) close (o);
- if (iret == -1)
- {
- ulog (LOG_ERROR, "get_fs_usage: disk_space failed: %s",
- strerror (errno));
- return -1;
- }
-
- fsp->fsu_blocks = ctotal_blocks;
- fsp->fsu_bfree = cfree_blocks;
- fsp->fsu_bavail = cfree_blocks;
-
- /* QNX has no limit on the number of inodes. Most inodes are stored
- directly in the directory entry. */
- fsp->fsu_files = -1;
- fsp->fsu_ffree = -1;
- #endif /* STAT_DISK_SPACE */
-
- #if STAT_USTAT
- struct stat sstat;
- struct ustat s;
-
- if (stat (path, &sstat) < 0
- || ustat (sstat.st_dev, &s) < 0)
- return -1;
- fsp->fsu_blocks = -1;
- fsp->fsu_bfree = s.f_tfree;
- fsp->fsu_bavail = s.f_tfree;
- fsp->fsu_files = -1;
- fsp->fsu_ffree = -1;
- #endif
-
- #if ! STAT_STATFS2_FS_DATA /* ! Ultrix */
- #if ! STAT_DISK_SPACE
- #if ! STAT_USTAT
- #if ! STAT_NONE
- 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
- #endif
- #endif
- #endif
-
- return 0;
- }
-
- #ifdef _AIX
- #ifdef _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 /* _I386 */
- #endif /* _AIX */
-