2004-07-01 06:39:13 +08:00
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/* fsusage.c -- return space usage of mounted file systems
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2003-06-07 03:46:45 +08:00
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2005-06-02 13:05:29 +08:00
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Copyright (C) 1991, 1992, 1996, 1998, 1999, 2002, 2003, 2004, 2005
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Free Software Foundation, Inc.
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1992-11-01 04:42:48 +08:00
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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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1996-07-15 11:36:16 +08:00
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along with this program; if not, write to the Free Software Foundation,
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2005-05-14 15:58:06 +08:00
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Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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1992-11-01 04:42:48 +08:00
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2005-09-22 14:05:39 +08:00
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#ifdef HAVE_CONFIG_H
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1996-11-04 07:53:51 +08:00
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# include <config.h>
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1993-10-07 00:44:26 +08:00
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#endif
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1997-11-30 18:24:24 +08:00
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#if HAVE_INTTYPES_H
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# include <inttypes.h>
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2004-08-03 02:44:11 +08:00
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#endif
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#if HAVE_STDINT_H
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# include <stdint.h>
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#endif
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2005-07-02 16:41:46 +08:00
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#include <unistd.h>
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2002-09-26 16:18:33 +08:00
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#ifndef UINTMAX_MAX
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# define UINTMAX_MAX ((uintmax_t) -1)
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1997-11-30 18:24:24 +08:00
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#endif
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2002-09-26 16:18:33 +08:00
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1992-11-01 04:42:48 +08:00
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#include <sys/types.h>
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1994-10-27 21:43:59 +08:00
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#include <sys/stat.h>
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1992-11-01 04:42:48 +08:00
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#include "fsusage.h"
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2003-06-07 03:46:45 +08:00
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#include <limits.h>
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1998-03-20 06:18:04 +08:00
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1996-11-04 07:53:51 +08:00
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#if HAVE_SYS_PARAM_H
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# include <sys/param.h>
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1993-04-15 09:58:23 +08:00
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#endif
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1996-11-04 07:53:51 +08:00
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#if HAVE_SYS_MOUNT_H
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# include <sys/mount.h>
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1992-11-01 04:42:48 +08:00
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#endif
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1996-11-04 07:53:51 +08:00
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#if HAVE_SYS_VFS_H
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# include <sys/vfs.h>
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1992-11-01 04:42:48 +08:00
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#endif
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1996-11-05 11:38:23 +08:00
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#if HAVE_SYS_FS_S5PARAM_H /* Fujitsu UXP/V */
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1996-11-04 07:53:51 +08:00
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# include <sys/fs/s5param.h>
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1996-07-31 12:43:59 +08:00
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#endif
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2002-09-25 19:45:37 +08:00
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#if defined HAVE_SYS_FILSYS_H && !defined _CRAY
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1996-11-05 11:38:23 +08:00
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# include <sys/filsys.h> /* SVR2 */
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1992-11-01 04:42:48 +08:00
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#endif
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2005-07-02 04:55:29 +08:00
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#include <fcntl.h>
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1992-11-01 04:42:48 +08:00
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1996-11-04 07:53:51 +08:00
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#if HAVE_SYS_STATFS_H
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# include <sys/statfs.h>
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1992-11-01 04:42:48 +08:00
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#endif
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1996-11-05 11:38:23 +08:00
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#if HAVE_DUSTAT_H /* AIX PS/2 */
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1996-11-04 07:53:51 +08:00
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# include <sys/dustat.h>
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1992-11-01 04:42:48 +08:00
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#endif
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1996-11-05 11:38:23 +08:00
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#if HAVE_SYS_STATVFS_H /* SVR4 */
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1996-11-04 07:53:51 +08:00
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# include <sys/statvfs.h>
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1992-11-01 04:42:48 +08:00
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#endif
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2003-01-06 21:08:19 +08:00
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#include "full-read.h"
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1998-01-06 01:33:54 +08:00
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/* Many space usage primitives use all 1 bits to denote a value that is
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not applicable or unknown. Propagate this information by returning
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2002-09-26 16:18:33 +08:00
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a uintmax_t value that is all 1 bits if X is all 1 bits, even if X
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is unsigned and narrower than uintmax_t. */
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#define PROPAGATE_ALL_ONES(x) \
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((sizeof (x) < sizeof (uintmax_t) \
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&& (~ (x) == (sizeof (x) < sizeof (int) \
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? - (1 << (sizeof (x) * CHAR_BIT)) \
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: 0))) \
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? UINTMAX_MAX : (x))
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1998-01-06 01:33:54 +08:00
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1998-03-20 06:18:04 +08:00
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/* Extract the top bit of X as an uintmax_t value. */
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#define EXTRACT_TOP_BIT(x) ((x) \
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& ((uintmax_t) 1 << (sizeof (x) * CHAR_BIT - 1)))
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/* If a value is negative, many space usage primitives store it into an
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integer variable by assignment, even if the variable's type is unsigned.
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So, if a space usage variable X's top bit is set, convert X to the
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uintmax_t value V such that (- (uintmax_t) V) is the negative of
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the original value. If X's top bit is clear, just yield X.
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Use PROPAGATE_TOP_BIT if the original value might be negative;
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otherwise, use PROPAGATE_ALL_ONES. */
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#define PROPAGATE_TOP_BIT(x) ((x) | ~ (EXTRACT_TOP_BIT (x) - 1))
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1992-11-01 04:42:48 +08:00
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/* Fill in the fields of FSP with information about space usage for
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2005-06-02 13:05:29 +08:00
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the file system on which FILE resides.
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DISK is the device on which FILE is mounted, for space-getting
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1992-11-01 04:42:48 +08:00
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methods that need to know it.
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1996-11-29 03:37:01 +08:00
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Return 0 if successful, -1 if not. When returning -1, ensure that
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ERRNO is either a system error value, or zero if DISK is NULL
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on a system that requires a non-NULL value. */
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1992-11-01 04:42:48 +08:00
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int
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2005-06-02 13:05:29 +08:00
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get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp)
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1992-11-01 04:42:48 +08:00
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{
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1996-11-05 11:38:23 +08:00
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#ifdef STAT_STATFS3_OSF1
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1993-04-15 09:58:23 +08:00
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struct statfs fsd;
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2005-06-02 13:05:29 +08:00
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if (statfs (file, &fsd, sizeof (struct statfs)) != 0)
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1994-03-16 22:32:26 +08:00
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return -1;
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1996-11-05 11:38:23 +08:00
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1998-01-06 01:33:54 +08:00
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fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_fsize);
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1997-11-30 18:24:24 +08:00
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1993-10-10 04:43:31 +08:00
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#endif /* STAT_STATFS3_OSF1 */
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1993-04-15 09:58:23 +08:00
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1996-11-05 11:38:23 +08:00
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#ifdef STAT_STATFS2_FS_DATA /* Ultrix */
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1992-11-01 04:42:48 +08:00
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struct fs_data fsd;
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2005-06-02 13:05:29 +08:00
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if (statfs (file, &fsd) != 1)
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1992-11-01 04:42:48 +08:00
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return -1;
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1997-11-30 18:24:24 +08:00
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fsp->fsu_blocksize = 1024;
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1998-01-06 01:33:54 +08:00
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fsp->fsu_blocks = PROPAGATE_ALL_ONES (fsd.fd_req.btot);
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fsp->fsu_bfree = PROPAGATE_ALL_ONES (fsd.fd_req.bfree);
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1998-03-20 06:18:04 +08:00
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fsp->fsu_bavail = PROPAGATE_TOP_BIT (fsd.fd_req.bfreen);
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fsp->fsu_bavail_top_bit_set = EXTRACT_TOP_BIT (fsd.fd_req.bfreen) != 0;
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1998-01-06 01:33:54 +08:00
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fsp->fsu_files = PROPAGATE_ALL_ONES (fsd.fd_req.gtot);
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fsp->fsu_ffree = PROPAGATE_ALL_ONES (fsd.fd_req.gfree);
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1992-11-01 04:42:48 +08:00
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1996-11-05 11:38:23 +08:00
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#endif /* STAT_STATFS2_FS_DATA */
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#ifdef STAT_READ_FILSYS /* SVR2 */
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1996-11-04 07:53:51 +08:00
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# ifndef SUPERBOFF
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# define SUPERBOFF (SUPERB * 512)
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# endif
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1996-11-05 11:38:23 +08:00
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1992-11-01 04:42:48 +08:00
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struct filsys fsd;
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int fd;
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1996-11-29 03:37:01 +08:00
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if (! disk)
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{
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errno = 0;
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return -1;
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}
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1992-11-01 04:42:48 +08:00
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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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1997-11-30 18:24:24 +08:00
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lseek (fd, (off_t) SUPERBOFF, 0);
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2003-01-06 21:08:19 +08:00
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if (full_read (fd, (char *) &fsd, sizeof fsd) != sizeof fsd)
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1992-11-01 04:42:48 +08:00
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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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1997-11-30 18:24:24 +08:00
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1998-01-06 01:38:38 +08:00
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fsp->fsu_blocksize = (fsd.s_type == Fs2b ? 1024 : 512);
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1998-01-06 01:33:54 +08:00
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fsp->fsu_blocks = PROPAGATE_ALL_ONES (fsd.s_fsize);
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fsp->fsu_bfree = PROPAGATE_ALL_ONES (fsd.s_tfree);
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1998-03-20 06:18:04 +08:00
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fsp->fsu_bavail = PROPAGATE_TOP_BIT (fsd.s_tfree);
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fsp->fsu_bavail_top_bit_set = EXTRACT_TOP_BIT (fsd.s_tfree) != 0;
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1998-01-06 01:33:54 +08:00
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fsp->fsu_files = (fsd.s_isize == -1
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2002-09-26 16:18:33 +08:00
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? UINTMAX_MAX
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1998-01-06 01:33:54 +08:00
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: (fsd.s_isize - 2) * INOPB * (fsd.s_type == Fs2b ? 2 : 1));
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fsp->fsu_ffree = PROPAGATE_ALL_ONES (fsd.s_tinode);
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1992-11-01 04:42:48 +08:00
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1996-11-05 11:38:23 +08:00
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#endif /* STAT_READ_FILSYS */
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#ifdef STAT_STATFS2_BSIZE /* 4.3BSD, SunOS 4, HP-UX, AIX */
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1992-11-01 04:42:48 +08:00
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struct statfs fsd;
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2005-06-02 13:05:29 +08:00
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if (statfs (file, &fsd) < 0)
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1992-11-01 04:42:48 +08:00
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return -1;
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1995-10-02 02:23:29 +08:00
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1998-01-06 01:33:54 +08:00
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fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_bsize);
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1997-11-30 18:24:24 +08:00
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1996-11-04 07:53:51 +08:00
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# ifdef STATFS_TRUNCATES_BLOCK_COUNTS
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1996-11-05 11:38:23 +08:00
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1995-10-02 02:23:29 +08:00
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/* In SunOS 4.1.2, 4.1.3, and 4.1.3_U1, the block counts in the
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struct statfs are truncated to 2GB. These conditions detect that
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truncation, presumably without botching the 4.1.1 case, in which
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the values are not truncated. The correct counts are stored in
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undocumented spare fields. */
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1999-07-15 15:50:06 +08:00
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if (fsd.f_blocks == 0x7fffffff / fsd.f_bsize && fsd.f_spare[0] > 0)
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1995-10-02 02:23:29 +08:00
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{
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fsd.f_blocks = fsd.f_spare[0];
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fsd.f_bfree = fsd.f_spare[1];
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fsd.f_bavail = fsd.f_spare[2];
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}
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1996-11-04 07:53:51 +08:00
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# endif /* STATFS_TRUNCATES_BLOCK_COUNTS */
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1995-10-02 02:23:29 +08:00
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1996-11-05 11:38:23 +08:00
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#endif /* STAT_STATFS2_BSIZE */
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#ifdef STAT_STATFS2_FSIZE /* 4.4BSD */
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1992-11-01 04:42:48 +08:00
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struct statfs fsd;
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2005-06-02 13:05:29 +08:00
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if (statfs (file, &fsd) < 0)
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1992-11-01 04:42:48 +08:00
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return -1;
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1998-01-06 01:33:54 +08:00
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fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_fsize);
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1997-11-30 18:24:24 +08:00
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1996-11-05 11:38:23 +08:00
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#endif /* STAT_STATFS2_FSIZE */
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1992-11-01 04:42:48 +08:00
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1996-11-05 11:38:23 +08:00
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#ifdef STAT_STATFS4 /* SVR3, Dynix, Irix, AIX */
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1997-11-30 18:24:24 +08:00
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# if !_AIX && !defined _SEQUENT_ && !defined DOLPHIN
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# define f_bavail f_bfree
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1994-10-29 13:06:43 +08:00
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# endif
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1992-11-01 04:42:48 +08:00
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1996-11-05 11:38:23 +08:00
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struct statfs fsd;
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2005-06-02 13:05:29 +08:00
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if (statfs (file, &fsd, sizeof fsd, 0) < 0)
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1996-11-05 11:38:23 +08:00
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return -1;
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1997-11-30 18:24:24 +08:00
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1996-11-05 11:38:23 +08:00
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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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2002-09-25 19:45:37 +08:00
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# if _AIX || defined _CRAY
|
1998-01-06 01:33:54 +08:00
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fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_bsize);
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1997-11-30 18:24:24 +08:00
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# else
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fsp->fsu_blocksize = 512;
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# endif
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1996-11-05 11:38:23 +08:00
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#endif /* STAT_STATFS4 */
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#ifdef STAT_STATVFS /* SVR4 */
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1992-11-01 04:42:48 +08:00
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struct statvfs fsd;
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|
2005-06-02 13:05:29 +08:00
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if (statvfs (file, &fsd) < 0)
|
1992-11-01 04:42:48 +08:00
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return -1;
|
1997-11-30 18:24:24 +08:00
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1992-11-01 04:42:48 +08:00
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/* f_frsize isn't guaranteed to be supported. */
|
2002-09-26 16:18:33 +08:00
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fsp->fsu_blocksize = (fsd.f_frsize
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? PROPAGATE_ALL_ONES (fsd.f_frsize)
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: PROPAGATE_ALL_ONES (fsd.f_bsize));
|
1992-11-01 04:42:48 +08:00
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1996-11-05 11:38:23 +08:00
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#endif /* STAT_STATVFS */
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2002-09-25 19:45:37 +08:00
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#if !defined STAT_STATFS2_FS_DATA && !defined STAT_READ_FILSYS
|
1996-11-05 11:38:23 +08:00
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/* !Ultrix && !SVR2 */
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1998-01-06 01:33:54 +08:00
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fsp->fsu_blocks = PROPAGATE_ALL_ONES (fsd.f_blocks);
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fsp->fsu_bfree = PROPAGATE_ALL_ONES (fsd.f_bfree);
|
1998-03-20 06:18:04 +08:00
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fsp->fsu_bavail = PROPAGATE_TOP_BIT (fsd.f_bavail);
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fsp->fsu_bavail_top_bit_set = EXTRACT_TOP_BIT (fsd.f_bavail) != 0;
|
1998-01-06 01:33:54 +08:00
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|
fsp->fsu_files = PROPAGATE_ALL_ONES (fsd.f_files);
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|
fsp->fsu_ffree = PROPAGATE_ALL_ONES (fsd.f_ffree);
|
1996-11-05 11:38:23 +08:00
|
|
|
|
|
|
|
#endif /* not STAT_STATFS2_FS_DATA && not STAT_READ_FILSYS */
|
1992-11-01 04:42:48 +08:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2002-09-25 19:45:37 +08:00
|
|
|
#if defined _AIX && defined _I386
|
1992-11-01 04:42:48 +08:00
|
|
|
/* AIX PS/2 does not supply statfs. */
|
|
|
|
|
|
|
|
int
|
2005-06-02 13:05:29 +08:00
|
|
|
statfs (char *file, struct statfs *fsb)
|
1992-11-01 04:42:48 +08:00
|
|
|
{
|
|
|
|
struct stat stats;
|
|
|
|
struct dustat fsd;
|
|
|
|
|
2005-06-02 13:05:29 +08:00
|
|
|
if (stat (file, &stats) != 0)
|
1992-11-01 04:42:48 +08:00
|
|
|
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;
|
|
|
|
}
|
1996-11-05 11:38:23 +08:00
|
|
|
|
1992-11-01 04:42:48 +08:00
|
|
|
#endif /* _AIX && _I386 */
|