NetBSD/sbin/newfs_sysvbfs/newfs_sysvbfs.c

243 lines
5.7 KiB
C

/* $NetBSD: newfs_sysvbfs.c,v 1.8 2011/08/29 14:35:03 joerg 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.
*
* 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 <err.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>
__dead 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;
uint32_t partsize;
int Fflag, Zflag;
int part;
int fd, ch;
if (argc < 2)
usage();
Fflag = Zflag = partsize = 0;
while ((ch = getopt(argc, argv, "Fs:Z")) != -1) {
switch (ch) {
case 'F':
Fflag = 1;
break;
case 's':
partsize = atoi(optarg);
break;
case 'Z':
Zflag = 1;
break;
default:
usage();
/*NOTREACHED*/
}
}
argc -= optind;
argv += optind;
if (argc != 1)
usage();
device = argv[0];
if (!Fflag) {
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;
}
partsize = p->p_size;
} else {
off_t filesize;
uint8_t zbuf[8192] = {0, };
if (partsize == 0) {
warnx("-F requires -s");
exit(EXIT_FAILURE);
}
filesize = partsize << BFS_BSHIFT;
fd = open(device, O_RDWR|O_CREAT|O_TRUNC, 0666);
if (fd == -1) {
perror("open file");
exit(EXIT_FAILURE);
}
if (Zflag) {
while (filesize > 0) {
size_t writenow = MIN(filesize, (off_t)sizeof(zbuf));
if ((size_t)write(fd, zbuf, writenow) != writenow) {
perror("zwrite");
exit(EXIT_FAILURE);
}
filesize -= writenow;
}
} else {
if (lseek(fd, filesize-1, SEEK_SET) == -1) {
perror("lseek");
exit(EXIT_FAILURE);
}
if (write(fd, zbuf, 1) != 1) {
perror("write");
exit(EXIT_FAILURE);
}
if (lseek(fd, 0, SEEK_SET) == -1) {
perror("lseek 2");
exit(EXIT_FAILURE);
}
}
}
if (bfs_newfs(fd, partsize) != 0)
goto err_exit;
close(fd);
return 0;
err_exit:
close(fd);
exit(EXIT_FAILURE);
}
static 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 error;
/* 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 ((error = 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;
}
static void
usage(void)
{
(void)fprintf(stderr, "usage: %s [-FZ] [-s sectors] special-device\n",
getprogname());
exit(EXIT_FAILURE);
}