diff options
Diffstat (limited to 'sysdeps/common/fsusage.c')
| -rw-r--r-- | sysdeps/common/fsusage.c | 274 |
1 files changed, 274 insertions, 0 deletions
diff --git a/sysdeps/common/fsusage.c b/sysdeps/common/fsusage.c new file mode 100644 index 00000000..e90abf94 --- /dev/null +++ b/sysdeps/common/fsusage.c @@ -0,0 +1,274 @@ +/* fsusage.c -- return space usage of mounted filesystems + Copyright (C) 1991, 1992, 1996 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. */ + +#if HAVE_CONFIG_H +# include <config.h> +#endif + +#include <sys/types.h> +#include <sys/stat.h> +#include "fsusage.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_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_FCNTL_H +# include <fcntl.h> +#endif + +#if HAVE_SYS_STATFS_H +# include <sys/statfs.h> +#endif + +#if HAVE_DUSTAT_H /* AIX PS/2 */ +# include <sys/dustat.h> +#endif + +#if HAVE_SYS_STATVFS_H /* SVR4 */ +# include <sys/statvfs.h> +int statvfs (); +#endif + +int safe_read (); + +/* 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); +} + +/* 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. 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 (path, disk, fsp) + const char *path; + const char *disk; + struct fs_usage *fsp; +{ +#ifdef STAT_STATFS3_OSF1 +# define CONVERT_BLOCKS(B) adjust_blocks ((B), fsd.f_fsize, 512) + + struct statfs fsd; + + if (statfs (path, &fsd, sizeof (struct statfs)) != 0) + return -1; + +#endif /* STAT_STATFS3_OSF1 */ + +#ifdef STAT_STATFS2_FS_DATA /* Ultrix */ +# define CONVERT_BLOCKS(B) adjust_blocks ((B), 1024, 512) + + struct fs_data fsd; + + if (statfs (path, &fsd) != 1) + return -1; + 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 /* STAT_STATFS2_FS_DATA */ + +#ifdef STAT_READ_FILSYS /* SVR2 */ +# ifndef SUPERBOFF +# define SUPERBOFF (SUPERB * 512) +# endif +# define CONVERT_BLOCKS(B) \ + adjust_blocks ((B), (fsd.s_type == Fs2b ? 1024 : 512), 512) + + struct filsys fsd; + int fd; + + if (! disk) + { + errno = 0; + return -1; + } + + fd = open (disk, O_RDONLY); + if (fd < 0) + return -1; + lseek (fd, (long) SUPERBOFF, 0); + if (safe_read (fd, (char *) &fsd, sizeof fsd) != sizeof fsd) + { + close (fd); + return -1; + } + close (fd); + 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 /* STAT_READ_FILSYS */ + +#ifdef STAT_STATFS2_BSIZE /* 4.3BSD, SunOS 4, HP-UX, AIX */ +# define CONVERT_BLOCKS(B) adjust_blocks ((B), fsd.f_bsize, 512) + + struct statfs fsd; + + if (statfs (path, &fsd) < 0) + return -1; + +# 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 == 0x1fffff && 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 */ + +#endif /* STAT_STATFS2_BSIZE */ + +#ifdef STAT_STATFS2_FSIZE /* 4.4BSD */ +# define CONVERT_BLOCKS(B) adjust_blocks ((B), fsd.f_fsize, 512) + + struct statfs fsd; + + if (statfs (path, &fsd) < 0) + return -1; + +#endif /* STAT_STATFS2_FSIZE */ + +#ifdef STAT_STATFS4 /* SVR3, Dynix, Irix, AIX */ +# if _AIX || defined(_CRAY) +# define CONVERT_BLOCKS(B) adjust_blocks ((B), fsd.f_bsize, 512) +# ifdef _CRAY +# define f_bavail f_bfree +# endif +# 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 + + 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. */ + +#endif /* STAT_STATFS4 */ + +#ifdef STAT_STATVFS /* SVR4 */ +# define CONVERT_BLOCKS(B) \ + adjust_blocks ((B), fsd.f_frsize ? fsd.f_frsize : fsd.f_bsize, 512) + + struct statvfs fsd; + + if (statvfs (path, &fsd) < 0) + return -1; + /* f_frsize isn't guaranteed to be supported. */ + +#endif /* STAT_STATVFS */ + +#if !defined(STAT_STATFS2_FS_DATA) && !defined(STAT_READ_FILSYS) + /* !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 /* not STAT_STATFS2_FS_DATA && not STAT_READ_FILSYS */ + + 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 */ |