mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-29 12:03:03 +00:00
be3a49ee62
filesystems. It differs from file(1) in that it gives machine-parseable output, it outputs filesystem labels, doesn't get confused by other formats metadata, and runs in Capsicum sandbox. Differential Revision: https://reviews.freebsd.org/D1255 Relnotes: yes Sponsored by: The FreeBSD Foundation
110 lines
3.6 KiB
C
110 lines
3.6 KiB
C
/*-
|
|
* Copyright (c) 2002, 2003 Gordon Tetlow
|
|
* Copyright (c) 2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
|
|
* Copyright (c) 2014 The FreeBSD Foundation
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed by Edward Tomasz Napierala under sponsorship
|
|
* from the FreeBSD Foundation.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <stdint.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include <ufs/ufs/dinode.h>
|
|
#include <ufs/ffs/fs.h>
|
|
|
|
#include "fstyp.h"
|
|
|
|
static const int superblocks[] = SBLOCKSEARCH;
|
|
|
|
int
|
|
fstyp_ufs(FILE *fp, char *label, size_t labelsize)
|
|
{
|
|
int sb, superblock;
|
|
struct fs *fs;
|
|
|
|
/*
|
|
* Walk through the standard places that superblocks hide and look
|
|
* for UFS magic. If we find magic, then check that the size in the
|
|
* superblock corresponds to the size of the underlying provider.
|
|
* Finally, look for a volume label and create an appropriate
|
|
* provider based on that.
|
|
*/
|
|
for (sb = 0; (superblock = superblocks[sb]) != -1; sb++) {
|
|
fs = (struct fs *)read_buf(fp, superblock, SBLOCKSIZE);
|
|
if (fs == NULL)
|
|
continue;
|
|
/*
|
|
* Check for magic. We also need to check if file system size is equal
|
|
* to providers size, because sysinstall(8) used to bogusly put first
|
|
* partition at offset 0 instead of 16, and glabel/ufs would find file
|
|
* system on slice instead of partition.
|
|
*/
|
|
#ifdef notyet
|
|
if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0 &&
|
|
((pp->mediasize / fs->fs_fsize == fs->fs_old_size) ||
|
|
(pp->mediasize / fs->fs_fsize == fs->fs_providersize))) {
|
|
/* Valid UFS1. */
|
|
} else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0 &&
|
|
((pp->mediasize / fs->fs_fsize == fs->fs_size) ||
|
|
(pp->mediasize / fs->fs_fsize == fs->fs_providersize))) {
|
|
/* Valid UFS2. */
|
|
} else {
|
|
g_free(fs);
|
|
continue;
|
|
}
|
|
#else
|
|
if (fs->fs_magic == FS_UFS1_MAGIC && fs->fs_fsize > 0) {
|
|
/* Valid UFS1. */
|
|
} else if (fs->fs_magic == FS_UFS2_MAGIC && fs->fs_fsize > 0) {
|
|
/* Valid UFS2. */
|
|
} else {
|
|
free(fs);
|
|
continue;
|
|
}
|
|
#endif
|
|
|
|
if (fs->fs_sblockloc != superblock || fs->fs_ncg < 1 ||
|
|
fs->fs_bsize < MINBSIZE ||
|
|
(size_t)fs->fs_bsize < sizeof(struct fs)) {
|
|
free(fs);
|
|
continue;
|
|
}
|
|
|
|
strlcpy(label, fs->fs_volname, labelsize);
|
|
|
|
free(fs);
|
|
return (0);
|
|
}
|
|
|
|
return (1);
|
|
}
|