/* 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 #endif #if HAVE_SYS_MOUNT_H #include #endif #if HAVE_SYS_VFS_H #include #endif #if HAVE_SYS_FILSYS_H #include /* SVR2. */ #endif #if HAVE_FCNTL_H #include #endif #if HAVE_SYS_STATFS_H #include #endif #if HAVE_SYS_DUSTAT_H /* AIX PS/2. */ #include #endif #if HAVE_SYS_STATVFS_H /* SVR4. */ #include int statvfs (); #endif #if HAVE_USTAT_H /* SVR2 and others. */ #include #endif #if STAT_DISK_SPACE /* QNX. */ #include #include #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 */