#!/bin/sh # Copyright (C) 2015 - 2016 # Thomas Schmitt , libburnia-project.org # Provided under BSD license: Use, modify, and distribute as you like. echo >&2 echo "frontend/grub-mkrescue-sed.sh manipulating xorriso arguments" >&2 echo >&2 # This script may be handed by its absolute path to grub-mkrescue # via option --xorriso= . E.g. # # mkdir minimal # touch minimal/empty-file.txt # grub-mkrescue -o output.iso minimal \ # --xorriso=/home/thomas/xorriso-1.4.3./frontend/grub-mkrescue-sed.sh # # It will manipulate the xorriso arguments before they get executed by a # xorriso program. Default is the neighboring ../../xorriso/xorriso program or, # if that neighbor cannot be found, the system-wide installed xorriso. # # The mode "mjg" implements a layout which resembles Fedora LiveCD and Debian # ISOs which are bootable by ISOLINUX for BIOS and GRUB2 for EFI. # Its GPT is considered to be surplus, according to UEFI specs. # # The mode "mbr_only" implements an alternative layout according to UEFI 2.4, # section 2.5.1 and table 16. No GTP, HFS+, or APM. # # The mode "mbr_hfs" is like "mbr_only" but with HFS+ mentioned in APM. # It is still compliant to UEFI with no potentially deceiving GPT. # If you add xorrisofs option -part_like_isohybrid then no gap fillig APM # partition will emerge. # # Mode "gpt_appended" represents the same layout as "mbr_only" by GPT rather # than by MBR partition table. It differs from "original" by the fact that # option -partition_offset 16 is implied and that the first partition may # be used to mount the ISO 9660 filesystem. # # These modes avoid duplicate storing of the EFI system partition "efi.img" # by xorrisofs option -e "--interval:appended_partition_${partno}:all::" # which is new to xorriso-1.4.4. # If "_copy" is appended to the mode name, then the file /efi.img will # appear in the ISO 9660 filesystem and traditional -e "/efi.img" is used. # # "mbr_only_copy" is supposed to work with unmodified xorriso >= 1.3.2 # # Variation settings # # The environment variables MKRESCUE_SED_* override the following # default settings: # Manipulation mode: # "mjg" = ESP in MBR+GPT+APM, with HFS+ # "mbr_only" = ESP in MBR, without HFS+ # "mbr_hfs" = ESP in MBR, HFS+ in APM # "gpt_appended" = ESP in GPT # $mode"_copy" = one of above modes, ESP in ISO and as appended partition # "original" = pass arguments unchanged (i.e. no mountable ISO partition) mode="mjg" if test -n "$MKRESCUE_SED_MODE" then mode="$MKRESCUE_SED_MODE" fi # First argument of -append_partition with mode "mjg". Values: 1 or 2. partno=1 if test -n "$MKRESCUE_SED_PARTNO" then partno="$MKRESCUE_SED_PARTNO" fi # Replacement for option --protective-msdos-label. Either itself or empty text. # If the environment variable contains the word "no", this means empty. protective="--protective-msdos-label" if test -n "$MKRESCUE_SED_PROTECTIVE" then if test x"$MKRESCUE_SED_PROTECTIVE" = xno then protective="" elif test x"$MKRESCUE_SED_PROTECTIVE" = xyes then protective="--protective-msdos-label" else protective="$MKRESCUE_SED_PROTECTIVE" fi fi # "yes" shows xorriso arguments, "extra" additionally shows all input files. debug=no if test -n "$MKRESCUE_SED_DEBUG" then debug="$MKRESCUE_SED_DEBUG" fi # The path to the program that will be executed with the converted arguments. if test -n "$MKRESCUE_SED_XORRISO" then xorriso="$MKRESCUE_SED_XORRISO" else # Prefer neighboring xorriso binary over system-wide installed one. self_dir="$(dirname $(dirname "$0") )" if test -x "$self_dir"/xorriso/xorriso then xorriso="$self_dir"/xorriso/xorriso else xorriso="xorriso" fi fi # MKRESCUE_SED_XORRISO_ARGS will be used as first arguments of the xorriso run. # (Trailing xorriso arguments may be simply added to the grub-mkrescue # command line.) # Each argument must be a single word. No whitespace. No quotation marks. # # Do the work # # grub-mkrescue inquires features by running these arguments if test "$*" = "-as mkisofs -help" then "$xorriso" "$@" exit $? fi echo "frontend/grub-mkrescue-sed.sh mode: $mode" >&2 echo >&2 if test x"$debug" = xyes -o x"$debug" = xextra then # Show arguments echo "##### Begin of received arguments" >&2 echo "$0" >&2 for i in "$@" do echo "$i" >&2 done echo "##### End of received arguments" >&2 echo >&2 fi # Look for the name of the /tmp directory with the GRUB2 files. # It is the next argument after -r. But as default accept any /tmp/grub.* next_is_dir=0 dir="." for i in "$@" do if test x"$i" = x"-r" then next_is_dir=1 elif test $next_is_dir = 1 then next_is_dir=0 if echo "$i" | grep '^/tmp/grub.' >/dev/null 2>&1 then test -d "$i" && dir="$i" fi elif test "$dir" = "." then if echo "$i" | grep '^/tmp/grub.' >/dev/null 2>&1 then test -d "$i" && dir="$i" fi fi done if test x"$debug" = xextra then # Show files on disk find "$dir" fi efi_tmp_name= if test x"$mode" = xmjg then # Exchange arguments for the experimental GRUB2 mjg layout efi_tmp_name=grub-mkrescue-sed-efi-img.$$ mv "$dir"/efi.img /tmp/$efi_tmp_name x=$(echo " $*" | sed \ -e "s/-efi-boot-part --efi-boot-image/-no-pad -append_partition $partno 0xef \/tmp\/$efi_tmp_name/" \ -e "s/--efi-boot efi\.img/-eltorito-alt-boot -e --interval:appended_partition_${partno}:all:: -no-emul-boot -isohybrid-gpt-basdat/" \ -e "s/--protective-msdos-label/$protective -part_like_isohybrid/" \ ) elif test x"$mode" = xmjg_copy then # Exchange arguments for the experimental GRUB2 mjg layout x=$(echo " $*" | sed \ -e "s/-efi-boot-part --efi-boot-image/-no-pad -append_partition $partno 0xef \/tmp\/$(basename "$dir")\/efi.img/" \ -e "s/--efi-boot efi\.img/-eltorito-alt-boot -e efi.img -no-emul-boot -isohybrid-gpt-basdat/" \ -e "s/--protective-msdos-label/$protective -part_like_isohybrid/" \ ) elif test x"$mode" = xmbr_only then # Exchange arguments for no-HFS MBR-only layout efi_tmp_name=grub-mkrescue-sed-efi-img.$$ mv "$dir"/efi.img /tmp/$efi_tmp_name x=$(echo " $*" | sed \ -e "s/-efi-boot-part --efi-boot-image/-no-pad -append_partition 2 0xef \/tmp\/$efi_tmp_name/" \ -e "s/--efi-boot efi\.img/-eltorito-alt-boot -e --interval:appended_partition_2:all:: -no-emul-boot/" \ -e "s/-hfsplus .*CoreServices\/boot.efi//" \ -e "s/--protective-msdos-label/$protective/" \ ) elif test x"$mode" = xmbr_only_copy then # Exchange arguments for no-HFS MBR-only layout x=$(echo " $*" | sed \ -e "s/-efi-boot-part --efi-boot-image/-no-pad -append_partition 2 0xef \/tmp\/$(basename "$dir")\/efi.img/" \ -e "s/-hfsplus .*CoreServices\/boot.efi//" \ -e "s/--protective-msdos-label/$protective/" \ ) elif test x"$mode" = xmbr_hfs then # Exchange arguments for MBR and HFS+ layout efi_tmp_name=grub-mkrescue-sed-efi-img.$$ mv "$dir"/efi.img /tmp/$efi_tmp_name x=$(echo " $*" | sed \ -e "s/-efi-boot-part --efi-boot-image/-no-pad -append_partition 2 0xef \/tmp\/$efi_tmp_name/" \ -e "s/--efi-boot efi\.img/-eltorito-alt-boot -e --interval:appended_partition_2:all:: -no-emul-boot/" \ -e "s/--protective-msdos-label/$protective/" \ ) elif test x"$mode" = xmbr_hfs_copy then # Exchange arguments for MBR and HFS+ layout x=$(echo " $*" | sed \ -e "s/-efi-boot-part --efi-boot-image/-no-pad -append_partition 2 0xef \/tmp\/$(basename "$dir")\/efi.img/" \ -e "s/--protective-msdos-label/$protective/" \ ) elif test x"$mode" = xgpt_appended then # Exchange arguments for no-HFS MBR-only layout efi_tmp_name=grub-mkrescue-sed-efi-img.$$ mv "$dir"/efi.img /tmp/$efi_tmp_name x=$(echo " $*" | sed \ -e "s/-efi-boot-part --efi-boot-image/-no-pad -append_partition 2 0xef \/tmp\/$efi_tmp_name -appended_part_as_gpt -partition_offset 16/" \ -e "s/--efi-boot efi\.img/-eltorito-alt-boot -e --interval:appended_partition_2:all:: -no-emul-boot/" \ -e "s/-hfsplus .*CoreServices\/boot.efi//" \ ) elif test x"$mode" = xgpt_appended_copy then # Exchange arguments for no-HFS MBR-only layout x=$(echo " $*" | sed \ -e "s/-efi-boot-part --efi-boot-image/-no-pad -append_partition 2 0xef \/tmp\/$(basename "$dir")\/efi.img -appended_part_as_gpt -partition_offset 16/" \ -e "s/-hfsplus .*CoreServices\/boot.efi//" \ ) elif test x"$mode" = xoriginal then # Pass arguments unchanged x=" $*" else echo >&2 echo "$0 : FATAL : Unknown manipulation mode '$mode'." >&2 echo >&2 exit 1 fi if test x"$debug" = xyes -o x"$debug" = xextra then echo "+ converted xorriso arguments:" >&2 echo " $x" >&2 echo >&2 fi # Run xorriso binary with the converted arguments use_gdb=no if test "$use_gdb" = yes then gdb_file=/tmp/grub-mkrescue-sed-gdb echo b assess_appended_gpt >$gdb_file echo run $MKRESCUE_SED_XORRISO_ARGS $x >>$gdb_file gdb -x $gdb_file "$xorriso" ret=0 else "$xorriso" $MKRESCUE_SED_XORRISO_ARGS $x ret=$? fi # Move back the ESP if it was separated if test -n "$efi_tmp_name" -a -e /tmp/$efi_tmp_name then mv /tmp/$efi_tmp_name "$dir"/efi.img fi exit $ret