361bc94452
- check for existence of fsid_t type, and typedef it if missing - check for existence of struct statvfs.f_basetype field - if <sys/mkdev.h> is included and makedev() is missing, try to use mkdev() - add replacement library file for utimes() by wrappering utime()
151 lines
5 KiB
C
151 lines
5 KiB
C
/* $NetBSD: statfs.c,v 1.5 2004/03/11 13:28:45 grant Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#if HAVE_CONFIG_H
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#include "nbcompat/nbconfig.h"
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#endif
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#if HAVE_STRING_H
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#include <string.h>
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#endif
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#include "nbcompat/statfs.h"
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static void vfs2fs(struct statfs *, const struct statvfs *);
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static void
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vfs2fs(struct statfs *sfs, const struct statvfs *vfs)
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{
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sfs->f_type = 0; /* ok */
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sfs->f_flags = 0;
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if (vfs->f_flag & ST_RDONLY)
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sfs->f_flags |= MNT_RDONLY;
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if (vfs->f_flag & ST_NOSUID)
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sfs->f_flags |= MNT_NOSUID;
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/*
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* From a quick survey of f_bsize, f_iosize, and f_frsize on
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* various NetBSD and Solaris systems, with varying fragment and
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* block sizes:
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*
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* f_bsize f_iosize f_frsize
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* netbsd 1k/8k 1024 8192
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* netbsd 2k/16k 2048 16384
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* solaris 1k/8k 8192 1024
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* solaris 2k/8k 8192 2048
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* solaris 512/4k 4096 512
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*
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* It is apparent that:
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*
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* - netbsd's f_bsize is equivalent to the fragment size of the
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* underlying filesystem
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* - netbsd's f_iosize is equivalent to the block size of the
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* underlying filesystem
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* - solaris's f_bsize is equivalent to the block size of the
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* underlying filesystem
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* - solaris's f_frsize is equivalent to the fragment size of the
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* underlying filesystem
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*
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* NetBSD's statfs(2) man page (and sys/mount.h header file) says:
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*
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* long f_bsize; /* fundamental file system block size * /
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* long f_iosize; /* optimal transfer block size * /
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*
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* and Solaris's statvfs(2) man page says:
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*
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* u_long f_bsize; /* preferred file system block size * /
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* u_long f_frsize; /* fundamental filesystem block
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* (size if supported) * /
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*
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* so it makes sense that their f_frsize == our f_bsize.
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*
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* I see that Solaris's sys/statvfs.h says:
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*
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* unsigned long f_bsize; /* fundamental file system block size * /
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* unsigned long f_frsize; /* fragment size * /
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*
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* but empiric testing (above) seems to indicate that the comments
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* in their code are wrong. The following two assignments, even
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* though they may look wrong, are actually correct.
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*/
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sfs->f_bsize = vfs->f_frsize;
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sfs->f_iosize = vfs->f_bsize;
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sfs->f_blocks = vfs->f_blocks;
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sfs->f_bfree = vfs->f_bfree;
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sfs->f_bavail = vfs->f_bavail;
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sfs->f_files = vfs->f_files;
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sfs->f_ffree = vfs->f_ffree;
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(void) memcpy(&sfs->f_fsid.val[0], &vfs->f_fsid, sizeof(fsid_t));
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sfs->f_owner = 0; /* XXX: root always here */
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#if HAVE_STRUCT_STATVFS_F_BASETYPE
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(void)strncpy(sfs->f_fstypename,
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vfs->f_basetype, sizeof(sfs->f_fstypename));
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#else
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sfs->f_fstypename[0] = '\0';
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#endif
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sfs->f_mntonname[0] = '\0'; /* XXX: */
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sfs->f_mntfromname[0] = '\0'; /* XXX: */
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}
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int
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statfs(path, sfs)
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const char *path;
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struct statfs *sfs;
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{
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struct statvfs vfs;
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if (statvfs(path, &vfs) == -1)
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return -1;
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vfs2fs(sfs, &vfs);
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return 0;
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}
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int
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fstatfs(fd, sfs)
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int fd;
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struct statfs *sfs;
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{
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struct statvfs vfs;
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if (fstatvfs(fd, &vfs) == -1)
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return -1;
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vfs2fs(sfs, &vfs);
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return 0;
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}
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