NetBSD/gnu/libexec/uucp/libunix/fsusg.c

336 lines
7.8 KiB
C

/* 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"
#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_FILSYS_H
#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_SYS_DUSTAT_H /* AIX PS/2. */
#include <sys/dustat.h>
#endif
#if HAVE_SYS_STATVFS_H /* SVR4. */
#include <sys/statvfs.h>
int statvfs ();
#endif
#if HAVE_USTAT_H /* SVR2 and others. */
#include <ustat.h>
#endif
#if STAT_DISK_SPACE /* QNX. */
#include <sys/disk.h>
#include <errno.h>
#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
#ifndef POSIX_HEADERS
extern int statfs ();
#endif
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 */