diff options
Diffstat (limited to 'lib/fsusage.c')
| -rw-r--r-- | lib/fsusage.c | 265 |
1 files changed, 0 insertions, 265 deletions
diff --git a/lib/fsusage.c b/lib/fsusage.c deleted file mode 100644 index 0bb622447..000000000 --- a/lib/fsusage.c +++ /dev/null @@ -1,265 +0,0 @@ -/* fsusage.c -- return space usage of mounted file systems - - Copyright (C) 1991, 1992, 1996, 1998, 1999, 2002, 2003, 2004, 2005, 2006 - 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ - -#ifdef HAVE_CONFIG_H -# include <config.h> -#endif - -#include "fsusage.h" - -#include <limits.h> -#include <sys/types.h> - -#if STAT_STATVFS /* POSIX 1003.1-2001 (and later) with XSI */ -# include <sys/statvfs.h> -#else -/* Don't include backward-compatibility files unless they're needed. - Eventually we'd like to remove all this cruft. */ -# include <fcntl.h> -# include <unistd.h> -# include <sys/stat.h> -# 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_FS_S5PARAM_H /* Fujitsu UXP/V */ -# include <sys/fs/s5param.h> -# endif -# if defined HAVE_SYS_FILSYS_H && !defined _CRAY -# include <sys/filsys.h> /* SVR2 */ -# endif -# if HAVE_SYS_STATFS_H -# include <sys/statfs.h> -# endif -# if HAVE_DUSTAT_H /* AIX PS/2 */ -# include <sys/dustat.h> -# endif -# include "full-read.h" -#endif - -#ifndef UINTMAX_MAX -# define UINTMAX_MAX ((uintmax_t) -1) -#endif - -/* 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)) - -/* 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 - 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. */ -int -get_fs_usage (char const *file, char const *disk, struct fs_usage *fsp) -{ -#if defined STAT_STATVFS /* POSIX */ - - struct statvfs fsd; - - if (statvfs (file, &fsd) < 0) - return -1; - - /* 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)); - -#elif defined STAT_STATFS2_FS_DATA /* Ultrix */ - - struct fs_data fsd; - - if (statfs (file, &fsd) != 1) - 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); - -#elif defined STAT_READ_FILSYS /* SVR2 */ -# ifndef SUPERBOFF -# define SUPERBOFF (SUPERB * 512) -# endif - - struct filsys fsd; - int fd; - - if (! disk) - { - errno = 0; - return -1; - } - - 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) - { - close (fd); - return -1; - } - close (fd); - - 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); - -#elif defined STAT_STATFS3_OSF1 - - struct statfs fsd; - - if (statfs (file, &fsd, sizeof (struct statfs)) != 0) - return -1; - - fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_fsize); - -#elif defined STAT_STATFS2_BSIZE /* 4.3BSD, SunOS 4, HP-UX, AIX */ - - struct statfs fsd; - - if (statfs (file, &fsd) < 0) - return -1; - - fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_bsize); - -# ifdef STATFS_TRUNCATES_BLOCK_COUNTS - - /* 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]; - } -# endif /* STATFS_TRUNCATES_BLOCK_COUNTS */ - -#elif defined STAT_STATFS2_FSIZE /* 4.4BSD */ - - struct statfs fsd; - - if (statfs (file, &fsd) < 0) - return -1; - - fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_fsize); - -#elif defined STAT_STATFS4 /* SVR3, Dynix, Irix, AIX */ - -# if !_AIX && !defined _SEQUENT_ && !defined DOLPHIN -# define f_bavail f_bfree -# endif - - struct statfs fsd; - - if (statfs (file, &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 || defined _CRAY - fsp->fsu_blocksize = PROPAGATE_ALL_ONES (fsd.f_bsize); -# else - fsp->fsu_blocksize = 512; -# endif - -#endif - -#if (defined STAT_STATVFS \ - || (!defined STAT_STATFS2_FS_DATA && !defined STAT_READ_FILSYS)) - - 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); - -#endif - - return 0; -} - -#if defined _AIX && defined _I386 -/* AIX PS/2 does not supply statfs. */ - -int -statfs (char *file, struct statfs *fsb) -{ - struct stat stats; - struct dustat fsd; - - if (stat (file, &stats) != 0) - 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 */ |