diff options
Diffstat (limited to 'contrib/syslinux/latest/utils/isohybrid.c')
| -rw-r--r-- | contrib/syslinux/latest/utils/isohybrid.c | 557 |
1 files changed, 0 insertions, 557 deletions
diff --git a/contrib/syslinux/latest/utils/isohybrid.c b/contrib/syslinux/latest/utils/isohybrid.c deleted file mode 100644 index 7ee9a7f..0000000 --- a/contrib/syslinux/latest/utils/isohybrid.c +++ /dev/null @@ -1,557 +0,0 @@ -/* - * isohybrid.c: Post process an ISO 9660 image generated with mkisofs or - * genisoimage to allow - hybrid booting - as a CD-ROM or as a hard - * disk. - * - * This is based on the original Perl script written by H. Peter Anvin. The - * rewrite in C is to avoid dependency on Perl on a system under installation. - * - * Copyright (C) 2010 P J P <pj.pandit@yahoo.co.in> - * - * isohybrid is a free software; you can redistribute it and/or modify it - * under the terms of GNU General Public License as published by Free Software - * Foundation; either version 2 of the license, or (at your option) any later - * version. - * - * isohybrid is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along - * with isohybrid; if not, see: <http://www.gnu.org/licenses>. - * - */ - -#include <err.h> -#include <time.h> -#include <ctype.h> -#include <fcntl.h> -#include <stdio.h> -#include <alloca.h> -#include <getopt.h> -#include <signal.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <sys/stat.h> -#include <inttypes.h> - -#include "isohybrid.h" - -char *prog = NULL; -extern int opterr, optind; - -uint8_t mode = 0; -enum { VERBOSE = 1 }; - -/* user options */ -uint16_t head = 64; /* 1 <= head <= 256 */ -uint8_t sector = 32; /* 1 <= sector <= 63 */ - -uint8_t entry = 1; /* partition number: 1 <= entry <= 4 */ -uint8_t offset = 0; /* partition offset: 0 <= offset <= 64 */ -uint16_t type = 0x17; /* partition type: 0 <= type <= 255 */ -uint32_t id = 0; /* MBR: 0 <= id <= 0xFFFFFFFF(4294967296) */ - -uint8_t hd0 = 0; /* 0 <= hd0 <= 2 */ -uint8_t partok = 0; /* 0 <= partok <= 1 */ - -uint16_t ve[16]; -uint32_t catoffset = 0; -uint32_t c = 0, cc = 0, cs = 0; - -/* boot catalogue parameters */ -uint32_t de_lba = 0; -uint16_t de_seg = 0, de_count = 0, de_mbz2 = 0; -uint8_t de_boot = 0, de_media = 0, de_sys = 0, de_mbz1 = 0; - - -void -usage(void) -{ - printf("Usage: %s [OPTIONS] <boot.iso>\n", prog); -} - - -void -printh(void) -{ -#define FMT "%-18s %s\n" - - usage(); - - printf("\n"); - printf("Options:\n"); - printf(FMT, " -h <X>", "Number of default geometry heads"); - printf(FMT, " -s <X>", "Number of default geometry sectors"); - printf(FMT, " -e --entry", "Specify partition entry number (1-4)"); - printf(FMT, " -o --offset", "Specify partition offset (default 0)"); - printf(FMT, " -t --type", "Specify partition type (default 0x17)"); - printf(FMT, " -i --id", "Specify MBR ID (default random)"); - - printf("\n"); - printf(FMT, " --forcehd0", "Assume we are loaded as disk ID 0"); - printf(FMT, " --ctrlhd0", "Assume disk ID 0 if the Ctrl key is pressed"); - printf(FMT, " --partok", "Allow booting from within a partition"); - - printf("\n"); - printf(FMT, " -? --help", "Display this help"); - printf(FMT, " -v --verbose", "Display verbose output"); - printf(FMT, " -V --version", "Display version information"); - - printf("\n"); - printf("Report bugs to <pj.pandit@yahoo.co.in>\n"); -} - - -int -check_option(int argc, char *argv[]) -{ - int n = 0, ind = 0; - - const char optstr[] = ":h:s:e:o:t:i:fcp?vV"; - struct option lopt[] = \ - { - { "entry", required_argument, NULL, 'e' }, - { "offset", required_argument, NULL, 'o' }, - { "type", required_argument, NULL, 't' }, - { "id", required_argument, NULL, 'i' }, - - { "forcehd0", no_argument, NULL, 'f' }, - { "ctrlhd0", no_argument, NULL, 'c' }, - { "partok", no_argument, NULL, 'p'}, - - { "help", no_argument, NULL, '?' }, - { "verbose", no_argument, NULL, 'v' }, - { "version", no_argument, NULL, 'V' }, - - { 0, 0, 0, 0 } - }; - - opterr = mode = 0; - while ((n = getopt_long_only(argc, argv, optstr, lopt, &ind)) != -1) - { - switch (n) - { - case 'h': - if (!sscanf(optarg, "%hu", &head) || head < 1 || head > 256) - errx(1, "invalid head: `%s', 1 <= head <= 256", optarg); - break; - - case 's': - if (!sscanf(optarg, "%hhu", §or) || sector < 1 || sector > 63) - errx(1, "invalid sector: `%s', 1 <= sector <= 63", optarg); - break; - - case 'e': - if (!sscanf(optarg, "%hhu", &entry) || entry < 1 || entry > 4) - errx(1, "invalid entry: `%s', 1 <= entry <= 4", optarg); - break; - - case 'o': - if (!sscanf(optarg, "%hhu", &offset) || offset > 64) - errx(1, "invalid offset: `%s', 0 <= offset <= 64", optarg); - break; - - case 't': - if (!sscanf(optarg, "%hu", &type) || type > 255) - errx(1, "invalid type: `%s', 0 <= type <= 255", optarg); - break; - - case 'i': - if (!sscanf(optarg, "%u", &id)) - errx(1, "invalid id: `%s'", optarg); - break; - - case 'f': - hd0 = 1; - break; - - case 'c': - hd0 = 2; - break; - - case 'p': - partok = 1; - break; - - case 'v': - mode |= VERBOSE; - break; - - case 'V': - printf("%s version %s\n", prog, VERSION); - exit(0); - - case ':': - errx(1, "option `-%c' takes an argument", optopt); - - default: - case '?': - if (optopt) - errx(1, "invalid option `-%c', see --help", optopt); - - printh(); - exit(0); - } - } - - return optind; -} - - -uint16_t -lendian_short(const uint16_t s) -{ - uint16_t r = 1; - - if (*(uint8_t *)&r) - return s; - - r = (s & 0x00FF) << 8 | (s & 0xFF00) >> 8; - - return r; -} - - -uint32_t -lendian_int(const uint32_t s) -{ - uint32_t r = 1; - - if (*(uint8_t *)&r) - return s; - - r = (s & 0x000000FF) << 24 | (s & 0xFF000000) >> 24 - | (s & 0x0000FF00) << 8 | (s & 0x00FF0000) >> 8; - - return r; -} - - -int -check_banner(const uint8_t *buf) -{ - static const char banner[] = "\0CD001\1EL TORITO SPECIFICATION\0\0\0\0" \ - "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0" \ - "\0\0\0\0\0"; - - if (!buf || memcmp(buf, banner, sizeof(banner) - 1)) - return 1; - - buf += sizeof(banner) - 1; - memcpy(&catoffset, buf, sizeof(catoffset)); - - catoffset = lendian_int(catoffset); - - return 0; -} - - -int -check_catalogue(const uint8_t *buf) -{ - int i = 0; - - for (i = 0, cs = 0; i < 16; i++) - { - ve[i] = 0; - memcpy(&ve[i], buf, sizeof(ve[i])); - - ve[i] = lendian_short(ve[i]); - - buf += 2; - cs += ve[i]; - - if (mode & VERBOSE) - printf("ve[%d]: %d, cs: %d\n", i, ve[i], cs); - } - if ((ve[0] != 0x0001) || (ve[15] != 0xAA55) || (cs & 0xFFFF)) - return 1; - - return 0; -} - - -int -read_catalogue(const uint8_t *buf) -{ - memcpy(&de_boot, buf++, 1); - memcpy(&de_media, buf++, 1); - - memcpy(&de_seg, buf, 2); - de_seg = lendian_short(de_seg); - buf += 2; - - memcpy(&de_sys, buf++, 1); - memcpy(&de_mbz1, buf++, 1); - - memcpy(&de_count, buf, 2); - de_count = lendian_short(de_count); - buf += 2; - - memcpy(&de_lba, buf, 4); - de_lba = lendian_int(de_lba); - buf += 4; - - memcpy(&de_mbz2, buf, 2); - de_mbz2 = lendian_short(de_mbz2); - buf += 2; - - if (de_boot != 0x88 || de_media != 0 - || (de_seg != 0 && de_seg != 0x7C0) || de_count != 4) - return 1; - - return 0; -} - - -void -display_catalogue(void) -{ - printf("de_boot: %hhu\n", de_boot); - printf("de_media: %hhu\n", de_media); - printf("de_seg: %hu\n", de_seg); - printf("de_sys: %hhu\n", de_sys); - printf("de_mbz1: %hhu\n", de_mbz1); - printf("de_count: %hu\n", de_count); - printf("de_lba: %u\n", de_lba); - printf("de_mbz2: %hu\n", de_mbz2); -} - - -int -initialise_mbr(uint8_t *mbr) -{ - int i = 0; - uint32_t psize = 0, tmp = 0; - uint8_t ptype = 0, *rbm = mbr; - uint8_t bhead = 0, bsect = 0, bcyle = 0; - uint8_t ehead = 0, esect = 0, ecyle = 0; - - extern unsigned char isohdpfx[][MBRSIZE]; - - memcpy(mbr, &isohdpfx[hd0 + 3 * partok], MBRSIZE); - mbr += MBRSIZE; /* offset 432 */ - - tmp = lendian_int(de_lba * 4); - memcpy(mbr, &tmp, sizeof(tmp)); - mbr += sizeof(tmp); /* offset 436 */ - - tmp = 0; - memcpy(mbr, &tmp, sizeof(tmp)); - mbr += sizeof(tmp); /* offset 440 */ - - tmp = lendian_int(id); - memcpy(mbr, &tmp, sizeof(tmp)); - mbr += sizeof(tmp); /* offset 444 */ - - mbr[0] = '\0'; - mbr[1] = '\0'; - mbr += 2; /* offset 446 */ - - ptype = type; - psize = c * head * sector - offset; - - bhead = (offset / sector) % head; - bsect = (offset % sector) + 1; - bcyle = offset / (head * sector); - - bsect += (bcyle & 0x300) >> 2; - bcyle &= 0xFF; - - ehead = head - 1; - esect = sector + (((cc - 1) & 0x300) >> 2); - ecyle = (cc - 1) & 0xFF; - - for (i = 1; i <= 4; i++) - { - memset(mbr, 0, 16); - if (i == entry) - { - mbr[0] = 0x80; - mbr[1] = bhead; - mbr[2] = bsect; - mbr[3] = bcyle; - mbr[4] = ptype; - mbr[5] = ehead; - mbr[6] = esect; - mbr[7] = ecyle; - - tmp = lendian_int(offset); - memcpy(&mbr[8], &tmp, sizeof(tmp)); - - tmp = lendian_int(psize); - memcpy(&mbr[12], &tmp, sizeof(tmp)); - } - mbr += 16; - } - mbr[0] = 0x55; - mbr[1] = 0xAA; - mbr += 2; - - return mbr - rbm; -} - - -void -display_mbr(const uint8_t *mbr, size_t len) -{ - unsigned char c = 0; - unsigned int i = 0, j = 0; - - printf("sizeof(MBR): %zu bytes\n", len); - for (i = 0; i < len; i++) - { - if (!(i % 16)) - printf("%04d ", i); - - if (!(i % 8)) - printf(" "); - - c = mbr[i]; - printf("%02x ", c); - - if (!((i + 1) % 16)) - { - printf(" |"); - for (; j <= i; j++) - printf("%c", isprint(mbr[j]) ? mbr[j] : '.'); - printf("|\n"); - } - } -} - - -int -main(int argc, char *argv[]) -{ - int i = 0; - FILE *fp = NULL; - struct stat isostat; - uint8_t *buf = NULL, *bufz = NULL; - int cylsize = 0, frac = 0, padding = 0; - - prog = strcpy(alloca(strlen(argv[0]) + 1), argv[0]); - i = check_option(argc, argv); - argc -= i; - argv += i; - - if (!argc) - { - usage(); - return 1; - } - srand(time(NULL) << (getppid() << getpid())); - - if (!(fp = fopen(argv[0], "r+"))) - err(1, "could not open file `%s'", argv[0]); - if (fseek(fp, 17 * 2048, SEEK_SET)) - err(1, "%s: seek error - 1", argv[0]); - - bufz = buf = calloc(BUFSIZE, sizeof(char)); - if (fread(buf, sizeof(char), BUFSIZE, fp) != BUFSIZE) - err(1, "%s", argv[0]); - - if (check_banner(buf)) - errx(1, "%s: could not find boot record", argv[0]); - - if (mode & VERBOSE) - printf("catalogue offset: %d\n", catoffset); - - if (fseek(fp, catoffset * 2048, SEEK_SET)) - err(1, "%s: seek error - 2", argv[0]); - - buf = bufz; - memset(buf, 0, BUFSIZE); - if (fread(buf, sizeof(char), BUFSIZE, fp) != BUFSIZE) - err(1, "%s", argv[0]); - - if (check_catalogue(buf)) - errx(1, "%s: invalid boot catalogue", argv[0]); - - buf += sizeof(ve); - if (read_catalogue(buf)) - errx(1, "%s: unexpected boot catalogue parameters", argv[0]); - - if (mode & VERBOSE) - display_catalogue(); - - if (fseek(fp, (de_lba * 2048 + 0x40), SEEK_SET)) - err(1, "%s: seek error - 3", argv[0]); - - buf = bufz; - memset(buf, 0, BUFSIZE); - if (fread(buf, sizeof(char), 4, fp) != 4) - err(1, "%s", argv[0]); - - if (memcmp(buf, "\xFB\xC0\x78\x70", 4)) - errx(1, "%s: boot loader does not have an isolinux.bin hybrid " \ - "signature. Note that isolinux-debug.bin does not support " \ - "hybrid booting", argv[0]); - - if (stat(argv[0], &isostat)) - err(1, "%s", argv[0]); - - cylsize = head * sector * 512; - frac = isostat.st_size % cylsize; - padding = (frac > 0) ? cylsize - frac : 0; - - if (mode & VERBOSE) - printf("imgsize: %zu, padding: %d\n", (size_t)isostat.st_size, padding); - - cc = c = (isostat.st_size + padding) / cylsize; - if (c > 1024) - { - warnx("Warning: more than 1024 cylinders: %d", c); - warnx("Not all BIOSes will be able to boot this device"); - cc = 1024; - } - - if (!id) - { - if (fseek(fp, 440, SEEK_SET)) - err(1, "%s: seek error - 4", argv[0]); - - if (fread(&id, 1, 4, fp) != 4) - err(1, "%s: read error", argv[0]); - - id = lendian_int(id); - if (!id) - { - if (mode & VERBOSE) - printf("random "); - id = rand(); - } - } - if (mode & VERBOSE) - printf("id: %u\n", id); - - buf = bufz; - memset(buf, 0, BUFSIZE); - i = initialise_mbr(buf); - - if (mode & VERBOSE) - display_mbr(buf, i); - - if (fseek(fp, 0, SEEK_SET)) - err(1, "%s: seek error - 5", argv[0]); - - if (fwrite(buf, sizeof(char), i, fp) != (size_t)i) - err(1, "%s: write error - 1", argv[0]); - - if (padding) - { - if (fsync(fileno(fp))) - err(1, "%s: could not synchronise", argv[0]); - - if (ftruncate(fileno(fp), isostat.st_size + padding)) - err(1, "%s: could not add padding bytes", argv[0]); - } - - free(buf); - fclose(fp); - - return 0; -} |