333 lines
7.8 KiB
C
333 lines
7.8 KiB
C
/* fsusage.c -- return space usage of mounted filesystems
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Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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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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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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This file was modified slightly by Ian Lance Taylor, December 1992,
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and again July 1995, for use with Taylor UUCP. */
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#include "uucp.h"
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#include "uudefs.h"
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#include "sysdep.h"
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#include "fsusg.h"
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int statfs ();
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#if HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#if HAVE_SYS_MOUNT_H
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#include <sys/mount.h>
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#endif
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#if HAVE_SYS_VFS_H
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#include <sys/vfs.h>
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#endif
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#if HAVE_SYS_FILSYS_H
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#include <sys/filsys.h> /* SVR2. */
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#endif
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#if HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#if HAVE_SYS_STATFS_H
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#include <sys/statfs.h>
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#endif
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#if HAVE_SYS_DUSTAT_H /* AIX PS/2. */
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#include <sys/dustat.h>
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#endif
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#if HAVE_SYS_STATVFS_H /* SVR4. */
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#include <sys/statvfs.h>
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int statvfs ();
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#endif
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#if HAVE_USTAT_H /* SVR2 and others. */
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#include <ustat.h>
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#endif
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#if STAT_DISK_SPACE /* QNX. */
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#include <sys/disk.h>
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#include <errno.h>
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#endif
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#define STAT_NONE 0
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#if ! STAT_STATFS3_OSF1
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#if ! STAT_STATFS2_FS_DATA
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#if ! STAT_STATFS2_BSIZE
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#if ! STAT_STATFS2_FSIZE
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#if ! STAT_STATFS4
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#if ! STAT_STATVFS
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#if ! STAT_DISK_SPACE
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#if ! STAT_USTAT
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#undef STAT_NONE
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#define STAT_NONE 1
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#endif
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#if ! STAT_NONE
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static long adjust_blocks P((long blocks, int fromsize, int tosize));
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/* Return the number of TOSIZE-byte blocks used by
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BLOCKS FROMSIZE-byte blocks, rounding away from zero.
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TOSIZE must be positive. Return -1 if FROMSIZE is not positive. */
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static long
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adjust_blocks (blocks, fromsize, tosize)
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long blocks;
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int fromsize, tosize;
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{
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if (tosize <= 0)
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abort ();
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if (fromsize <= 0)
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return -1;
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if (fromsize == tosize) /* E.g., from 512 to 512. */
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return blocks;
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else if (fromsize > tosize) /* E.g., from 2048 to 512. */
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return blocks * (fromsize / tosize);
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else /* E.g., from 256 to 512. */
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return (blocks + (blocks < 0 ? -1 : 1)) / (tosize / fromsize);
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}
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#endif
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/* Fill in the fields of FSP with information about space usage for
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the filesystem on which PATH resides.
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DISK is the device on which PATH is mounted, for space-getting
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methods that need to know it.
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Return 0 if successful, -1 if not. */
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int
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get_fs_usage (path, disk, fsp)
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char *path, *disk;
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struct fs_usage *fsp;
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{
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#if STAT_NONE
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return -1;
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#endif
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#if STAT_STATFS3_OSF1
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struct statfs fsd;
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if (statfs (path, &fsd, sizeof (struct statfs)) != 0)
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return -1;
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#define CONVERT_BLOCKS(b) adjust_blocks ((b), fsd.f_fsize, 512)
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#endif /* STAT_STATFS3_OSF1 */
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#if STAT_STATFS2_FS_DATA /* Ultrix. */
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struct fs_data fsd;
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if (statfs (path, &fsd) != 1)
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return -1;
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#define CONVERT_BLOCKS(b) adjust_blocks ((long) (b), 1024, 512)
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fsp->fsu_blocks = CONVERT_BLOCKS (fsd.fd_req.btot);
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fsp->fsu_bfree = CONVERT_BLOCKS (fsd.fd_req.bfree);
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fsp->fsu_bavail = CONVERT_BLOCKS (fsd.fd_req.bfreen);
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fsp->fsu_files = fsd.fd_req.gtot;
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fsp->fsu_ffree = fsd.fd_req.gfree;
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#endif
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#if STAT_STATFS2_BSIZE /* 4.3BSD, SunOS 4, HP-UX, AIX. */
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struct statfs fsd;
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if (statfs (path, &fsd) < 0)
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return -1;
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#define CONVERT_BLOCKS(b) adjust_blocks ((b), fsd.f_bsize, 512)
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#endif
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#if STAT_STATFS2_FSIZE /* 4.4BSD. */
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struct statfs fsd;
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if (statfs (path, &fsd) < 0)
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return -1;
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#define CONVERT_BLOCKS(b) adjust_blocks ((b), fsd.f_fsize, 512)
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#endif
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#if STAT_STATFS4 /* SVR3, Dynix, Irix. */
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struct statfs fsd;
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if (statfs (path, &fsd, sizeof fsd, 0) < 0)
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return -1;
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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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# if _AIX
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# define CONVERT_BLOCKS(b) adjust_blocks ((b), fsd.f_bsize, 512)
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# else
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# define CONVERT_BLOCKS(b) (b)
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# ifndef _SEQUENT_ /* _SEQUENT_ is DYNIX/ptx. */
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# ifndef DOLPHIN /* DOLPHIN 3.8.alfa/7.18 has f_bavail */
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# define f_bavail f_bfree
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# endif
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# endif
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# endif
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#endif
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#if STAT_STATVFS /* SVR4. */
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struct statvfs fsd;
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if (statvfs (path, &fsd) < 0)
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return -1;
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/* f_frsize isn't guaranteed to be supported. */
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#define CONVERT_BLOCKS(b) \
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adjust_blocks ((b), fsd.f_frsize ? fsd.f_frsize : fsd.f_bsize, 512)
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#endif
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#if STAT_DISK_SPACE /* QNX. */
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int o;
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int iret;
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long cfree_blocks, ctotal_blocks;
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char *zpath;
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char *zslash;
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zpath = zbufcpy (path);
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while ((o = open (zpath, O_RDONLY, 0)) == -1
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&& errno == ENOENT)
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{
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/* The named file doesn't exist, so we can't open it. Try the
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directory containing it. */
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if ((strcmp ("/", zpath) == 0)
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|| (strcmp (zpath, ".") == 0)
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|| (strcmp (zpath, "") == 0)
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/* QNX peculiarity: "//2" means root on node 2 */
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|| ((strncmp (zpath, "//", 2) == 0)
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&& (strchr (zpath + 2, '/') == NULL)))
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{
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/* We can't shorten this! */
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break;
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}
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/* Shorten the pathname by one component and try again. */
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zslash = strrchr (zpath, '/');
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if (zslash == NULL)
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{
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/* Try the current directory. We can open directories. */
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zpath[0] = '.';
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zpath[1] = '\0';
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}
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else if (zslash == zpath)
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{
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/* Try the root directory. */
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zpath[0] = '/';
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zpath[1] = '\0';
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}
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else
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{
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/* Chop off last path component. */
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zslash[0] = '\0';
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}
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}
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if (o == -1)
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{
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ulog (LOG_ERROR, "get_fs_usage: open (%s) failed: %s", zpath,
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strerror (errno));
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ubuffree (zpath);
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return -1;
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}
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ubuffree (zpath);
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iret = disk_space (o, &cfree_blocks, &ctotal_blocks);
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(void) close (o);
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if (iret == -1)
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{
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ulog (LOG_ERROR, "get_fs_usage: disk_space failed: %s",
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strerror (errno));
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return -1;
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}
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fsp->fsu_blocks = ctotal_blocks;
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fsp->fsu_bfree = cfree_blocks;
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fsp->fsu_bavail = cfree_blocks;
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/* QNX has no limit on the number of inodes. Most inodes are stored
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directly in the directory entry. */
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fsp->fsu_files = -1;
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fsp->fsu_ffree = -1;
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#endif /* STAT_DISK_SPACE */
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#if STAT_USTAT
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struct stat sstat;
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struct ustat s;
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if (stat (path, &sstat) < 0
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|| ustat (sstat.st_dev, &s) < 0)
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return -1;
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fsp->fsu_blocks = -1;
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fsp->fsu_bfree = s.f_tfree;
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fsp->fsu_bavail = s.f_tfree;
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fsp->fsu_files = -1;
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fsp->fsu_ffree = -1;
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#endif
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#if ! STAT_STATFS2_FS_DATA /* ! Ultrix */
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#if ! STAT_DISK_SPACE
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#if ! STAT_USTAT
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#if ! STAT_NONE
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fsp->fsu_blocks = CONVERT_BLOCKS (fsd.f_blocks);
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fsp->fsu_bfree = CONVERT_BLOCKS (fsd.f_bfree);
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fsp->fsu_bavail = CONVERT_BLOCKS (fsd.f_bavail);
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fsp->fsu_files = fsd.f_files;
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fsp->fsu_ffree = fsd.f_ffree;
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#endif
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#endif
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#endif
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#endif
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return 0;
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}
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#ifdef _AIX
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#ifdef _I386
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/* AIX PS/2 does not supply statfs. */
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int
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statfs (path, fsb)
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char *path;
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struct statfs *fsb;
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{
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struct stat stats;
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struct dustat fsd;
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if (stat (path, &stats))
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return -1;
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if (dustat (stats.st_dev, 0, &fsd, sizeof (fsd)))
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return -1;
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fsb->f_type = 0;
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fsb->f_bsize = fsd.du_bsize;
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fsb->f_blocks = fsd.du_fsize - fsd.du_isize;
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fsb->f_bfree = fsd.du_tfree;
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fsb->f_bavail = fsd.du_tfree;
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fsb->f_files = (fsd.du_isize - 2) * fsd.du_inopb;
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fsb->f_ffree = fsd.du_tinode;
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fsb->f_fsid.val[0] = fsd.du_site;
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fsb->f_fsid.val[1] = fsd.du_pckno;
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return 0;
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}
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#endif /* _I386 */
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#endif /* _AIX */
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