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/*
* Copyright (C) 1996 Wolfgang Solfrank.
* Copyright (C) 1996 TooLs GmbH.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
*
* $FreeBSD$
*/
/*
* Stand-alone ISO9660 file reading package.
*
* Note: This doesn't support Rock Ridge extensions, extended attributes,
* blocksizes other than 2048 bytes, multi-extent files, etc.
*/
#include <sys/param.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <fcntl.h>
#include <ctype.h>
#include <err.h>
#include <isofs/cd9660/iso.h>
struct ptable_ent {
char namlen [ISODCL( 1, 1)]; /* 711 */
char extlen [ISODCL( 2, 2)]; /* 711 */
char block [ISODCL( 3, 6)]; /* 732 */
char parent [ISODCL( 7, 8)]; /* 722 */
char name [1];
};
#define PTFIXSZ 8
#define PTSIZE(pp) roundup(PTFIXSZ + isonum_711((pp)->namlen), 2)
#define cdb2off(bno) ((bno) * ISO_DEFAULT_BLOCK_SIZE)
/* XXX these should be in the system headers */
static __inline int
isonum_722(u_char *p)
{
return (*p << 8)|p[1];
}
static __inline int
isonum_732( u_char *p)
{
return (*p << 24)|(p[1] << 16)|(p[2] << 8)|p[3];
}
static int
dirmatch(const char *path, struct iso_directory_record *dp)
{
char *cp;
int i;
cp = dp->name;
for (i = isonum_711(dp->name_len); --i >= 0; path++, cp++) {
if (!*path || *path == '/')
break;
if (toupper(*path) == *cp)
continue;
return 0;
}
if (*path && *path != '/')
return 0;
/*
* Allow stripping of trailing dots and the version number.
* Note that this will find the first instead of the last version
* of a file.
*/
if (i >= 0 && (*cp == ';' || *cp == '.')) {
/* This is to prevent matching of numeric extensions */
if (*cp == '.' && cp[1] != ';')
return 0;
while (--i >= 0)
if (*++cp != ';' && (*cp < '0' || *cp > '9'))
return 0;
}
return 1;
}
static int
cd9660_findfile(int disk, const char *path, int *startp, int *lenp)
{
void *buf;
struct iso_primary_descriptor *vd;
size_t buf_size, read, dsize, off;
daddr_t bno, boff;
struct iso_directory_record rec;
struct iso_directory_record *dp = 0;
int rc = 0;
/* First find the volume descriptor */
buf = malloc(buf_size = ISO_DEFAULT_BLOCK_SIZE);
vd = buf;
for (bno = 16;; bno++) {
read = pread(disk, buf, ISO_DEFAULT_BLOCK_SIZE, cdb2off(bno));
if (read != ISO_DEFAULT_BLOCK_SIZE) {
rc = EIO;
goto out;
}
rc = EINVAL;
if (bcmp(vd->id, ISO_STANDARD_ID, sizeof vd->id) != 0)
goto out;
if (isonum_711(vd->type) == ISO_VD_END)
goto out;
if (isonum_711(vd->type) == ISO_VD_PRIMARY)
break;
}
if (isonum_723(vd->logical_block_size) != ISO_DEFAULT_BLOCK_SIZE) {
rc = EINVAL;
goto out;
}
rec = *(struct iso_directory_record *) vd->root_directory_record;
if (*path == '/') path++; /* eat leading '/' */
while (*path) {
bno = isonum_733(rec.extent) + isonum_711(rec.ext_attr_length);
dsize = isonum_733(rec.size);
off = 0;
boff = 0;
while (off < dsize) {
if ((off % ISO_DEFAULT_BLOCK_SIZE) == 0) {
read = pread(disk, buf,
ISO_DEFAULT_BLOCK_SIZE,
cdb2off(bno + boff));
if (read != ISO_DEFAULT_BLOCK_SIZE) {
rc = EIO;
goto out;
}
boff++;
dp = (struct iso_directory_record *) buf;
}
if (isonum_711(dp->length) == 0) {
/* skip to next block, if any */
off = boff * ISO_DEFAULT_BLOCK_SIZE;
continue;
}
if (dirmatch(path, dp))
break;
dp = (struct iso_directory_record *)
((char *) dp + isonum_711(dp->length));
off += isonum_711(dp->length);
}
if (off == dsize) {
rc = ENOENT;
goto out;
}
rec = *dp;
while (*path && *path != '/') /* look for next component */
path++;
if (*path) path++; /* skip '/' */
}
*startp = cdb2off(isonum_733(rec.extent)
+ isonum_711(rec.ext_attr_length));
*lenp = isonum_733(rec.size);
rc = 0;
out:
free(buf);
return rc;
}
int
main(int argc, char *argv[])
{
int disk, start, len, i;
char buf[512];
unsigned long long *lp, sum;
if (argc != 3) {
fprintf(stderr, "Usage: setcdboot <cd image> <boot path>\n");
exit(1);
}
disk = open(argv[1], O_RDWR);
if (disk < 0)
err(1, "Can't open %s", argv[1]);
if (cd9660_findfile(disk, argv[2], &start, &len))
errx(1, "Can't find %s in image", argv[2]);
printf("start=%d, len=%d\n", start, len);
/*
* Read the SRM boot sector and write location of bootstrap.
*/
if (pread(disk, buf, 512, 0) < 0)
errx(1, "Can't read boot sector");
lp = (unsigned long long *) buf;
lp[60] = (len + 511) / 512;
lp[61] = start / 512;
lp[62] = 0;
/*
* Checksum the boot sector and write it back.
*/
sum = 0;
for (i = 0; i < 63; i++)
sum += lp[i];
lp[63] = sum;
if (pwrite(disk, buf, 512, 0) < 0)
errx(1, "Can't write boot sector");
return 0;
}
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