/* $NetBSD: cd9660.c,v 1.2.2.2 2024/06/22 10:57:10 martin Exp $ */ /*- * Copyright (c) 2005 Izumi Tsutsui. 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 ``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 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. */ #if HAVE_NBTOOL_CONFIG_H #include "nbtool_config.h" #endif #include #if defined(__RCSID) && !defined(__lint) __RCSID("$NetBSD: cd9660.c,v 1.2.2.2 2024/06/22 10:57:10 martin Exp $"); #endif /* !__lint */ #include #if !HAVE_NBTOOL_CONFIG_H #include #endif #if !HAVE_NBTOOL_CONFIG_H || HAVE_SYS_ENDIAN_H #include #endif #include #include #include #include #include #include #include #include #include #include #include #include #include "installboot.h" #define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) #define MAXLEN 16 int cd9660_match(ib_params *params) { int rv, blocksize; struct iso_primary_descriptor ipd; assert(params != NULL); assert(params->fstype != NULL); assert(params->fsfd != -1); rv = pread(params->fsfd, &ipd, sizeof(ipd), ISO_DEFAULT_BLOCK_SIZE * 16); if (rv == -1) { warn("Reading primary descriptor in `%s'", params->filesystem); return 0; } else if (rv != sizeof(ipd)) { warnx("Reading primary descriptor in `%s': short read", params->filesystem); return 0; } if (ipd.type[0] != ISO_VD_PRIMARY || strncmp(ipd.id, ISO_STANDARD_ID, sizeof(ipd.id)) != 0 || ipd.version[0] != 1) { warnx("Filesystem `%s' is not ISO9660 format", params->filesystem); return 0; } blocksize = isonum_723((u_char *)ipd.logical_block_size); if (blocksize != ISO_DEFAULT_BLOCK_SIZE) { warnx("Invalid blocksize %d in `%s'", blocksize, params->filesystem); return 0; } params->fstype->blocksize = blocksize; params->fstype->needswap = 0; return 1; } int cd9660_findstage2(ib_params *params, uint32_t *maxblk, ib_block *blocks) { uint8_t buf[ISO_DEFAULT_BLOCK_SIZE]; char name[ISO_MAXNAMLEN]; char *stage2; off_t loc; int rv, blocksize, found; u_int i; struct iso_primary_descriptor ipd; struct iso_directory_record *idr; assert(params != NULL); assert(params->stage2 != NULL); assert(maxblk != NULL); assert(blocks != NULL); #if 0 if (params->flags & IB_STAGE2START) return hardcode_stage2(params, maxblk, blocks); #endif /* The secondary bootstrap must be clearly in /. */ strlcpy(name, params->stage2, ISO_MAXNAMLEN); stage2 = name; if (stage2[0] == '/') stage2++; if (strchr(stage2, '/') != NULL) { warnx("The secondary bootstrap `%s' must be in / " "on filesystem `%s'", params->stage2, params->filesystem); return 0; } if (strchr(stage2, '.') == NULL) { /* * XXX should fix isofncmp()? */ strlcat(name, ".", ISO_MAXNAMLEN); } rv = pread(params->fsfd, &ipd, sizeof(ipd), ISO_DEFAULT_BLOCK_SIZE * 16); if (rv == -1) { warn("Reading primary descriptor in `%s'", params->filesystem); return 0; } else if (rv != sizeof(ipd)) { warnx("Reading primary descriptor in `%s': short read", params->filesystem); return 0; } blocksize = isonum_723((u_char *)ipd.logical_block_size); idr = (void *)ipd.root_directory_record; loc = (off_t)isonum_733(idr->extent) * blocksize; rv = pread(params->fsfd, buf, blocksize, loc); if (rv == -1) { warn("Reading root directory record in `%s'", params->filesystem); return 0; } else if (rv != sizeof(ipd)) { warnx("Reading root directory record in `%s': short read", params->filesystem); return 0; } found = 0; for (i = 0; i < blocksize - sizeof(struct iso_directory_record); i += (u_char)idr->length[0]) { idr = (void *)&buf[i]; #ifdef DEBUG printf("i = %d, idr->length[0] = %3d\n", i, (u_char)idr->length[0]); #endif /* check end of entries */ if (idr->length[0] == 0) { #ifdef DEBUG printf("end of entries\n"); #endif break; } if (idr->flags[0] & 2) { /* skip directory entries */ #ifdef DEBUG printf("skip directory entry\n"); #endif continue; } if (idr->name_len[0] == 1 && (idr->name[0] == 0 || idr->name[0] == 1)) { /* skip "." and ".." */ #ifdef DEBUG printf("skip dot dot\n"); #endif continue; } #ifdef DEBUG { int j; printf("filename:"); for (j = 0; j < isonum_711(idr->name_len); j++) printf("%c", idr->name[j]); printf("\n"); } #endif if (isofncmp((u_char *)stage2, strlen(stage2), (u_char *)idr->name, isonum_711((u_char *)idr->name_len), 0) == 0) { found = 1; /* ISO filesystem always has contiguous file blocks */ blocks[0].block = (int64_t)isonum_733(idr->extent); blocks[0].blocksize = roundup(isonum_733(idr->size), blocksize); *maxblk = 1; #ifdef DEBUG printf("block = %ld, blocksize = %ld\n", (long)blocks[0].block, blocks[0].blocksize); #endif break; } } if (found == 0) { warnx("Can't find secondary bootstrap `%s' in filesystem `%s'", params->stage2, params->filesystem); return 0; } return 1; }