coreutils/lib/fsusage.c

290 lines
7.8 KiB
C
Raw Normal View History

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