/* $NetBSD: installboot.c,v 1.6 2012/10/14 16:20:04 tsutsui Exp $ */
/*
* Copyright (c) 2001 Minoura Makoto
* All rights reserved.
*
* 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 AUTHOR 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 AUTHOR 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <paths.h>
#include <err.h>
#include <sys/param.h>
#include <sys/disklabel.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#include "dkcksum.h"
#define MAXBBSIZE BBSIZE
#define LABELBYTEOFFSET (LABELSECTOR*512+LABELOFFSET)
int nflag = 0, vflag = 0, fflag = 0, merging = 0;
int floppy = 0;
char rawname[PATH_MAX];
off_t bboffset = 0;
size_t bootprogsize;
size_t blocksize;
const char *progname;
const char *bootprog;
char *target;
char template[] = _PATH_TMP "/installbootXXXXXX";
u_int8_t bootblock[MAXBBSIZE];
struct disklabel label;
void usage(void) __attribute((__noreturn__));
int checkbootprog(const char *);
int checktargetdev(const char *);
int checkparttype(const char *, int);
void
usage(void)
{
fprintf(stderr, "usage: %s [-nvf] /usr/mdec/xxboot_ufs /dev/rxx?a\n",
progname);
exit(1);
/* NOTREACHED */
}
int
checkbootprog(const char *name)
{
struct stat st;
if (access(name, R_OK) < 0)
err(1, "%s", name);
if (stat(name, &st) < 0)
err(1, "%s", name);
bootprogsize = st.st_size;
return 0;
}
int
checktargetdev(const char *name)
{
struct stat st;
if (access(name, W_OK) < 0)
err(1, "%s", name);
if (stat(name, &st) < 0)
err(1, "%s", name);
if (!S_ISCHR(st.st_mode))
errx(1, "%s: not a character special device", name);
if (DISKPART(st.st_rdev) > MAXPARTITIONS)
errx(1, "%s: invalid device", name);
strcpy(rawname, name);
if (strncmp(name + strlen(name) - 4, "fd", 2) == 0)
floppy = 1;
else
rawname[strlen(name) - 1] = RAW_PART+'a';
if (!floppy && DISKPART(st.st_rdev) == RAW_PART)
errx(1, "%s is the raw device", name);
return 0;
}
int
checkparttype(const char *name, int force)
{
struct stat st;
int fd, part;
fd = open(rawname, O_RDONLY | O_EXLOCK);
if (fd < 0)
err(1, "opening %s", name);
if (stat(name, &st) < 0)
err(1, "%s", name);
if (!S_ISCHR(st.st_mode))
errx(1, "%s: not a character special device", name);
part = DISKPART(st.st_rdev);
if (ioctl(fd, DIOCGDINFO, &label) < 0)
err(1, "%s: reading disklabel", name);
if (part >= label.d_npartitions)
errx(1, "%s: invalid partition", name);
blocksize = label.d_secsize;
if (blocksize < 512)
blocksize = 512;
if (blocksize > MAXBBSIZE)
errx(1, "%s: blocksize too large", name);
if (read(fd, bootblock, blocksize) != blocksize)
errx(1, "%s: reading the mark", name);
close(fd);
if (strncmp((const char *)bootblock, "X68SCSI1", 8) != 0)
floppy = 1; /* XXX: or unformated */
if (!force && !floppy) {
if (label.d_partitions[part].p_fstype != FS_BSDFFS
&& label.d_partitions[part].p_fstype != FS_BSDLFS)
errx(1, "%s: invalid partition type", name);
if ((label.d_partitions[part].p_offset * blocksize < 32768) &&
label.d_partitions[part].p_offset != 0)
errx(1, "%s: cannot make the partition bootable",
name);
}
if (floppy)
merging = 1;
else if (label.d_partitions[part].p_offset == 0) {
merging = 1;
bboffset = 1024; /* adjusted below */
}
if (merging) {
struct disklabel *lp;
lp = (struct disklabel *) &bootblock[LABELBYTEOFFSET];
memcpy(&label, lp, sizeof(struct disklabel));
if (lp->d_npartitions > MAXPARTITIONS ||
dkcksum(lp) != 0)
/* there is no valid label */
memset(&label, 0, sizeof(struct disklabel));
}
return 0;
}
int
main(int argc, char *argv[])
{
int c;
int fd;
progname = argv[0];
while ((c = getopt(argc, argv, "nvf")) != -1) {
switch (c) {
case 'n':
nflag = 1;
break;
case 'v':
vflag = 1;
break;
case 'f':
fflag = 1;
break;
default:
usage();
/* NOTREACHED */
}
}
argc -= optind;
argv += optind;
if (argc != 2)
usage();
bootprog = argv[0];
target = argv[1];
if (checkbootprog(bootprog) < 0)
errx(1, "aborting");
if (checktargetdev(target) < 0)
errx(1, "aborting");
if (checkparttype(target, fflag))
errx(1, "aborting");
if (merging && blocksize > bboffset && !floppy)
bboffset = blocksize;
if (bootprogsize > MAXBBSIZE - bboffset)
errx(1, "%s: boot block too big", bootprog);
/* Read the boot program */
fd = open(bootprog, O_RDONLY);
if (fd < 0)
err(1, "opening %s", bootprog);
if (read(fd, bootblock + bboffset, bootprogsize) != bootprogsize)
err(1, "reading %s", bootprog);
close(fd);
if (merging)
memcpy(bootblock + LABELBYTEOFFSET, &label, sizeof(label));
/* Write the boot block (+ disklabel if necessary) */
if (nflag) {
target = template;
fd = mkstemp(target);
if (fd < 0)
err(1, "opening the output file");
} else {
int writable = 1;
fd = open(target, O_WRONLY);
if (fd < 0)
err(1, "opening the disk");
if (merging && ioctl(fd, DIOCWLABEL, &writable) < 0)
err(1, "opening the disk");
}
bootprogsize = howmany(bootprogsize+bboffset, blocksize) * blocksize;
if (write(fd, bootblock, bootprogsize) != bootprogsize) {
warn("writing the label");
if (!nflag && merging) {
int writable = 0;
ioctl(fd, DIOCWLABEL, &writable);
}
exit(1);
}
if (!nflag && merging) {
int writable = 0;
ioctl(fd, DIOCWLABEL, &writable);
}
close(fd);
if (nflag)
fprintf(stderr, "The bootblock is kept in %s\n", target);
else
fprintf(stderr, "Do not forget to copy /usr/mdec/boot"
" to the root directory of %s.\n", target);
return 0;
}
