2009-11-11 Robert Millan <rmh.grub@aybabtu.com>
Support for El Torito without floppy emulation.
* util/mkisofs/eltorito.c: Include `<errno.h>'.
(init_boot_catalog): Improve error handling.
(get_torito_desc): Don't use floppy emulation unless requested by
user. Patch boot information table when requested via
`-boot-info-table'.
* util/mkisofs/iso9660.h (struct eltorito_boot_info): New struct.
* util/mkisofs/mkisofs.c (use_eltorito_emul_floppy)
(use_boot_info_table): New variables.
(OPTION_BOOT_INFO_TABLE, OPTION_NO_EMUL_BOOT)
(OPTION_ELTORITO_EMUL_FLOPPY): New macros.
(ld_options): Handle `-boot-info-table', `-no-emul-boot' and
`--eltorito-emul-floppy'.
(main): Handle `OPTION_BOOT_INFO_TABLE', `OPTION_NO_EMUL_BOOT'
and `OPTION_ELTORITO_EMUL_FLOPPY'.
* util/mkisofs/mkisofs.h (use_eltorito_emul_floppy)
(use_boot_info_table, get_731): New prototypes.
* util/mkisofs/write.c (get_731): New function.
This commit is contained in:
Robert Millan
parent
af7d4de5c2
commit
e1f240ff44
6 changed files with 148 additions and 25 deletions
22
ChangeLog
22
ChangeLog
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@ -1,3 +1,25 @@
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2009-11-11 Robert Millan <rmh.grub@aybabtu.com>
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Support for El Torito without floppy emulation.
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* util/mkisofs/eltorito.c: Include `<errno.h>'.
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(init_boot_catalog): Improve error handling.
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(get_torito_desc): Don't use floppy emulation unless requested by
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user. Patch boot information table when requested via
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`-boot-info-table'.
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* util/mkisofs/iso9660.h (struct eltorito_boot_info): New struct.
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* util/mkisofs/mkisofs.c (use_eltorito_emul_floppy)
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(use_boot_info_table): New variables.
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(OPTION_BOOT_INFO_TABLE, OPTION_NO_EMUL_BOOT)
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(OPTION_ELTORITO_EMUL_FLOPPY): New macros.
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(ld_options): Handle `-boot-info-table', `-no-emul-boot' and
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`--eltorito-emul-floppy'.
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(main): Handle `OPTION_BOOT_INFO_TABLE', `OPTION_NO_EMUL_BOOT'
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and `OPTION_ELTORITO_EMUL_FLOPPY'.
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* util/mkisofs/mkisofs.h (use_eltorito_emul_floppy)
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(use_boot_info_table, get_731): New prototypes.
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* util/mkisofs/write.c (get_731): New function.
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2009-11-11 Felix Zielcke <fzielcke@z-51.de>
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Fix the generation of the man page.
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@ -6,9 +6,14 @@
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Copyright 1996 RedHat Software, Incorporated
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Copyright (C) 2009 Free Software Foundation, Inc.
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Boot Info Table generation based on code from genisoimage.c
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(from cdrkit 1.1.9), which was originally licensed under GPLv2+.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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@ -17,8 +22,8 @@
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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static char rcsid[] ="$Id: eltorito.c,v 1.13 1999/03/02 03:41:25 eric Exp $";
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@ -29,6 +34,7 @@ static char rcsid[] ="$Id: eltorito.c,v 1.13 1999/03/02 03:41:25 eric Exp $";
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "config.h"
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#include "mkisofs.h"
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@ -103,12 +109,8 @@ void FDECL1(init_boot_catalog, const char *, path)
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* make it one CD sector long
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*/
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bcat = open(bootpath, O_WRONLY | O_CREAT | O_BINARY, S_IROTH | S_IRGRP | S_IRWXU );
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if (bcat == -1)
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{
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fprintf(stderr, "Error creating boot catalog, exiting...\n");
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perror("");
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exit(1);
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}
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if (bcat == -1)
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error (1, errno, "Error creating boot catalog (%s)", bootpath);
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buf = (char *) e_malloc( 2048 );
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write(bcat, buf, 2048);
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@ -217,31 +219,35 @@ void FDECL1(get_torito_desc, struct eltorito_boot_descriptor *, boot_desc)
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*/
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nsectors = ((de->size + 511) & ~(511))/512;
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fprintf(stderr, "\nSize of boot image is %d sectors -> ", nsectors);
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/*
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* choose size of emulated floppy based on boot image size
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*/
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if (nsectors == 2880 )
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{
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if (! use_eltorito_emul_floppy)
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{
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default_desc.boot_media[0] = EL_TORITO_MEDIA_NOEMUL;
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fprintf (stderr, "No emulation\n");
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}
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else if (nsectors == 2880 )
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/*
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* choose size of emulated floppy based on boot image size
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*/
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{
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default_desc.boot_media[0] = EL_TORITO_MEDIA_144FLOP;
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fprintf(stderr, "Emulating a 1.44 meg floppy\n");
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}
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}
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else if (nsectors == 5760 )
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{
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{
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default_desc.boot_media[0] = EL_TORITO_MEDIA_288FLOP;
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fprintf(stderr,"Emulating a 2.88 meg floppy\n");
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}
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}
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else if (nsectors == 2400 )
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{
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{
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default_desc.boot_media[0] = EL_TORITO_MEDIA_12FLOP;
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fprintf(stderr,"Emulating a 1.2 meg floppy\n");
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}
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}
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else
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{
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{
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fprintf(stderr,"\nError - boot image is not the an allowable size.\n");
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exit(1);
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}
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}
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/*
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* FOR NOW LOAD 1 SECTOR, JUST LIKE FLOPPY BOOT!!!
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@ -271,6 +277,53 @@ void FDECL1(get_torito_desc, struct eltorito_boot_descriptor *, boot_desc)
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write(bootcat, &valid_desc, 32);
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write(bootcat, &default_desc, 32);
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close(bootcat);
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/* If the user has asked for it, patch the boot image */
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if (use_boot_info_table)
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{
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int bootimage;
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uint32_t bi_checksum;
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unsigned int total_len;
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static char csum_buffer[SECTOR_SIZE];
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int len;
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struct eltorito_boot_info bi_table;
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bootimage = open (de->whole_name, O_RDWR | O_BINARY);
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if (bootimage == -1)
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error (1, errno, "Error opening boot image file '%s' for update",
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de->whole_name);
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/* Compute checksum of boot image, sans 64 bytes */
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total_len = 0;
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bi_checksum = 0;
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while ((len = read (bootimage, csum_buffer, SECTOR_SIZE)) > 0)
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{
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if (total_len & 3)
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error (1, 0, "Odd alignment at non-end-of-file in boot image '%s'",
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de->whole_name);
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if (total_len < 64)
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memset (csum_buffer, 0, 64 - total_len);
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if (len < SECTOR_SIZE)
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memset (csum_buffer + len, 0, SECTOR_SIZE - len);
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for (i = 0; i < SECTOR_SIZE; i += 4)
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bi_checksum += get_731 (&csum_buffer[i]);
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total_len += len;
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}
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if (total_len != de->size)
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error (1, 0, "Boot image file '%s' changed underneath us",
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de->whole_name);
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/* End of file, set position to byte 8 */
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lseek (bootimage, (off_t) 8, SEEK_SET);
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memset (&bi_table, 0, sizeof (bi_table));
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/* Is it always safe to assume PVD is at session_start+16? */
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set_731 (bi_table.pvd_addr, session_start + 16);
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set_731 (bi_table.file_addr, de->starting_block);
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set_731 (bi_table.file_length, de->size);
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set_731 (bi_table.file_checksum, bi_checksum);
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write (bootimage, &bi_table, sizeof (bi_table)); /* FIXME: check return value */
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close (bootimage);
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}
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} /* get_torito_desc(... */
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/*
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@ -6,9 +6,11 @@
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Copyright 1993 Yggdrasil Computing, Incorporated
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Copyright (C) 2009 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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@ -17,7 +19,7 @@
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/*
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@ -129,6 +131,20 @@ struct eltorito_defaultboot_entry {
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char pad2 [ISODCL ( 13, 32)];
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};
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/* El Torito boot information table */
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struct eltorito_boot_info
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{
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/* Address of Primary Volume Descriptor. */
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char pvd_addr[ISODCL (1, 4)];
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/* Boot file address. */
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char file_addr[ISODCL (5, 8)];
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/* Boot file length. */
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char file_length[ISODCL (9, 12)];
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/* Boot file checksum. */
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char file_checksum[ISODCL (13, 16)];
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char dummy[ISODCL (17, 56)];
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};
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/* We use this to help us look up the parent inode numbers. */
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@ -89,6 +89,8 @@ int extension_record_size = 0;
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/* These variables are associated with command line options */
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int use_eltorito = 0;
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int use_eltorito_emul_floppy = 0;
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int use_boot_info_table = 0;
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int use_RockRidge = 0;
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int use_Joliet = 0;
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int verbose = 1;
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@ -189,6 +191,10 @@ struct ld_option
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#define OPTION_EXPIR_DATE 168
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#define OPTION_EFFEC_DATE 169
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#define OPTION_BOOT_INFO_TABLE 170
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#define OPTION_NO_EMUL_BOOT 171
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#define OPTION_ELTORITO_EMUL_FLOPPY 172
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static const struct ld_option ld_options[] =
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{
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{ {"all-files", no_argument, NULL, 'a'},
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@ -205,6 +211,12 @@ static const struct ld_option ld_options[] =
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'b', "FILE", "Set El Torito boot image name" , ONE_DASH },
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{ {"eltorito-catalog", required_argument, NULL, 'c'},
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'c', "FILE", "Set El Torito boot catalog name" , ONE_DASH },
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{ {"boot-info-table", no_argument, NULL, OPTION_BOOT_INFO_TABLE },
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'\0', NULL, "Patch Boot Info Table in El Torito boot image" , ONE_DASH },
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{ {"no-emul-boot", no_argument, NULL, OPTION_NO_EMUL_BOOT },
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'\0', NULL, "Dummy option for backward compatibility" , ONE_DASH },
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{ {"eltorito-emul-floppy", no_argument, NULL, OPTION_ELTORITO_EMUL_FLOPPY },
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'\0', NULL, "Enable floppy drive emulation for El Torito" , TWO_DASHES },
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{ {"cdwrite-params", required_argument, NULL, 'C'},
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'C', "PARAMS", "Magic parameters from cdrecord" , ONE_DASH },
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{ {"omit-period", no_argument, NULL, 'd'},
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@ -716,6 +728,15 @@ int FDECL2(main, int, argc, char **, argv){
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exit(1);
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}
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break;
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case OPTION_BOOT_INFO_TABLE:
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use_boot_info_table = 1;
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break;
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case OPTION_NO_EMUL_BOOT:
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fprintf (stderr, "Ignoring -no-emul-boot (no-emulation is the default behaviour)\n");
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break;
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case OPTION_ELTORITO_EMUL_FLOPPY:
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use_eltorito_emul_floppy = 1;
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break;
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case OPTION_ABSTRACT:
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abstract = optarg;
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if(strlen(abstract) > 37) {
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@ -291,6 +291,8 @@ extern struct iso_directory_record root_record;
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extern struct iso_directory_record jroot_record;
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extern int use_eltorito;
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extern int use_eltorito_emul_floppy;
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extern int use_boot_info_table;
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extern int use_RockRidge;
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extern int use_Joliet;
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extern int rationalize;
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@ -335,6 +337,7 @@ extern void DECL(init_boot_catalog, (const char * path ));
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extern void DECL(get_torito_desc, (struct eltorito_boot_descriptor * path ));
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/* write.c */
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extern int DECL(get_731,(char *));
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extern int DECL(get_733,(char *));
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extern int DECL(isonum_733,(unsigned char *));
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extern void DECL(set_723,(char *, unsigned int));
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@ -111,6 +111,14 @@ void FDECL2(set_732, char *, pnt, unsigned int, i)
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pnt[0] = (i >> 24) & 0xff;
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}
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int FDECL1(get_731, char *, p)
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{
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return ((p[0] & 0xff)
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| ((p[1] & 0xff) << 8)
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| ((p[2] & 0xff) << 16)
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| ((p[3] & 0xff) << 24));
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}
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int FDECL1(get_733, char *, p)
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{
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return ((p[0] & 0xff)
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