NetBSD/sbin/newfs_sysvbfs/newfs_sysvbfs.c

179 lines
4.8 KiB
C

/* $NetBSD: newfs_sysvbfs.c,v 1.1 2005/12/29 14:53:45 tsutsui Exp $ */
/*-
* Copyright (c) 2004 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by UCHIYAMA Yasushi.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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/types.h>
#include <sys/param.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include <assert.h>
#include <sys/errno.h>
#include <sys/ioctl.h>
#include <sys/disklabel.h>
#include <fs/sysvbfs/bfs.h>
static void usage(void);
static int bfs_newfs(int, uint32_t);
int
main(int argc, char **argv)
{
const char *device;
struct disklabel d;
struct partition *p;
struct stat st;
int part;
int fd;
if (argc != 2)
usage();
device = argv[1];
if ((fd = open(device, O_RDWR)) == -1) {
perror("open device");
exit(EXIT_FAILURE);
}
if (fstat(fd, &st) != 0) {
perror("device stat");
goto err_exit;
}
if (!S_ISCHR(st.st_mode)) {
fprintf(stderr, "WARNING: not a raw device.\n");
}
part = DISKPART(st.st_rdev);
if (ioctl(fd, DIOCGDINFO, &d) == -1) {
perror("disklabel");
goto err_exit;
}
p = &d.d_partitions[part];
printf("partition = %d\n", part);
printf("size=%d offset=%d fstype=%d secsize=%d\n",
p->p_size, p->p_offset, p->p_fstype, d.d_secsize);
if (p->p_fstype != FS_SYSVBFS) {
fprintf(stderr, "not a SysVBFS partition.\n");
goto err_exit;
}
if (bfs_newfs(fd, p->p_size) != 0)
goto err_exit;
close(fd);
return 0;
err_exit:
close(fd);
exit(EXIT_FAILURE);
}
int
bfs_newfs(int fd, uint32_t nsectors)
{
uint8_t buf[DEV_BSIZE];
struct bfs_super_block *bfs = (void *)buf;
struct bfs_inode *inode = (void *)buf;
struct bfs_dirent *dirent = (void *)buf;
time_t t = time(0);
int err;
/* Super block */
memset(buf, 0, DEV_BSIZE);
bfs->header.magic = BFS_MAGIC;
bfs->header.data_start_byte = DEV_BSIZE * 2; /* super block + inode */
bfs->header.data_end_byte = nsectors * BFS_BSIZE - 1;
bfs->compaction.from = 0xffffffff;
bfs->compaction.to = 0xffffffff;
bfs->compaction.from_backup = 0xffffffff;
bfs->compaction.to_backup = 0xffffffff;
if ((err = lseek(fd, 0, SEEK_SET)) == -1) {
perror("seek super block");
return -1;
}
if (write(fd, buf, BFS_BSIZE) < 0) {
perror("write super block");
return -1;
}
/* i-node table */
memset(buf, 0, BFS_BSIZE);
inode->number = BFS_ROOT_INODE;
inode->start_sector = 2;
inode->end_sector = 2;
inode->eof_offset_byte = sizeof(struct bfs_dirent) +
inode->start_sector * BFS_BSIZE;
inode->attr.atime = t;
inode->attr.mtime = t;
inode->attr.ctime = t;
inode->attr.mode = 0755;
inode->attr.type = 2; /* DIR */
inode->attr.nlink = 2; /* . + .. */
if (write(fd, buf, BFS_BSIZE) < 0) {
perror("write i-node");
return -1;
}
/* dirent table */
memset(buf, 0, BFS_BSIZE);
dirent->inode = BFS_ROOT_INODE;
sprintf(dirent->name, ".");
dirent++;
dirent->inode = BFS_ROOT_INODE;
sprintf(dirent->name, "..");
if (write(fd, buf, BFS_BSIZE) < 0) {
perror("write dirent");
return -1;
}
return 0;
}
void
usage(void)
{
(void)fprintf(stderr, "usage: %s special-device\n", getprogname());
exit(EXIT_FAILURE);
}