#!/usr/bin/env bash
# Filename: grml2iso
# Purpose: create a multiboot grml ISO using grml2usb
-# Authors: Michael Prokop <mika@grml.org>,
-# Thorsten Glaser <tg@mirbsd.org>
+# Authors: Michael Prokop <mika@grml.org>
# Bug-Reports: see http://grml.org/bugs/
# License: This file is licensed under the GPL v2 or any later version.
################################################################################
-# define function getfilesize before "set -e" {{{
- if stat --help >/dev/null 2>&1; then
- getfilesize='stat -c %s' # GNU stat
- else
- getfilesize='stat -f %z' # BSD stat
- fi
-# }}}
+set -e -o pipefail
+
+# make sure we have the sbin directories in our PATH to find grml2usb ootb
+PATH="${PATH}:/sbin:/usr/local/sbin:/usr/sbin"
# adjust variables if necessary through environment {{{
# path to the grml2usb script you'd like to use
- [ -n "$GRML2USB" ] || GRML2USB='grml2usb'
-# work directory for creating the filesystem
- [ -n "$TMPDIR" ] && WRKDIR="${TMPDIR}/grml2iso.tmp"
- [ -n "$WRKDIR" ] || WRKDIR='/tmp/grml2iso.tmp'
+[ -n "$GRML2USB" ] || GRML2USB='grml2usb'
+
# support mkisofs as well as genisoimage
if which xorriso >/dev/null 2>&1 ; then
MKISOFS='xorriso -as mkisofs'
elif which genisoimage >/dev/null 2>&1; then
MKISOFS='genisoimage'
else
- echo >&2 "Error: neither mkisofs nor genisoimage available - can not create ISO."
+ echo "Error: neither xorriso nor mkisofs nor genisoimage available - can not create ISO." >&2
exit 1
fi
if ! which isohybrid >/dev/null 2>&1 ; then
- echo "Error: isohybrid executable not found (install syslinux?)." >&2
+ echo "Error: isohybrid executable not found (install syslinux/isolinux/syslinux-utils?)." >&2
exit 1
fi
# }}}
# helper stuff {{{
- set -e
-
usage() {
echo >&2 "Usage: $0 [OPTIONS] -o target.iso source1.iso [source2.iso ...]"
echo >&2 "
restrictions in the bootprocess only IPs are allowed.
Supported protocols are: http and ftp
-t Directory Directory that should be used for temporary files
- during build. Defaults to /tmp/grml2iso.tmp if unset.
+ during build, instead of using a temporary directory
+ created by mktemp(1).
Examples:
- $0 -s http://192.168.23.42:8000/grml/ -o small.iso grml64_2010.12.iso
+ $0 -s http://192.168.23.42:8000/grml/ -o small.iso grml64-small_2021.07.iso
Will generate a file small.iso which tries to download the squashfs file from
http://192.168.23.42:8000/grml/ - the squashfs file is placed in the same
case $name in
o) ISOFILE="$OPTARG";;
b) GRML2USB_OPTS+=(--bootoptions="$OPTARG");;
- c) DIR="$(readlink -f "$OPTARG")";;
+ c) DIR="$(readlink -f "$OPTARG")"; [ -n "$DIR" ] || { echo "Could not read $OPTARG - exiting" >&2 ; exit 1 ; } ;;
f) FORCE='true';;
r) GRML2USB_OPTS+=(--remove-bootoption="$OPTARG");;
p) GRML2USB_OPTS+=("$OPTARG");;
s) URI="$OPTARG";;
- t) WRKDIR="$OPTARG";;
+ t) WRKDIR="$(readlink -f "$OPTARG")";;
?) usage 2;;
esac
done
+
# test for specified URI
if [ -n "$URI" ] ; then
GRML2USB_OPTS+=(--bootoptions="fetch=$URI")
fi
- if [ -n "$WRKDIR" ] ; then
- GRML2USB_OPTS+=(--tmpdir="$WRKDIR")
- fi
-
# make sure -o is specified
[ -n "$ISOFILE" ] || usage 1
# check for grml2usb {{{
if [ ! -x "$(which $GRML2USB)" ] && [ ! -x "$GRML2USB" ] ; then
- echo >&2 "Error: Could not find grml2usb"
+ echo "Error: Could not find grml2usb executable. Is /usr/sbin missing in PATH?" >&2
+ echo "Tip: run GRML2USB=/usr/sbin/grml2usb grml2iso ... as workaround" >&2
if [ -x "./$GRML2USB" ] ; then
echo >&2 "If you executed grml2iso from the grml2usb repository use"
echo >&2 "GRML2USB=./grml2usb $0 $*"
esac
# }}}
-# create necessary stuff under WRKDIR {{{
- [ -d "$WRKDIR" ] && WRKDIR_EXISTED='true' || WRKDIR_EXISTED='false'
+# ensure to properly set up working directory {{{
+ WRKDIR_EXISTED='false'
+ if [ -z "$WRKDIR" ] ; then
+ WRKDIR="$(mktemp -d)"
+ else
+ [ -d "$WRKDIR" ] && WRKDIR_EXISTED='true'
+ fi
+
+ GRML2USB_OPTS+=(--tmpdir="$WRKDIR")
+
rm -rf "$WRKDIR/cddir" "$WRKDIR/grub_tmp"
mkdir -p "$WRKDIR/cddir"
# }}}}
# move syslinux to isolinux {{{
mv "$WRKDIR"/cddir/boot/syslinux "$WRKDIR"/cddir/boot/isolinux
+ echo "menu label ^Isolinux prompt" > "$WRKDIR"/cddir/boot/isolinux/promptname.cfg
+ echo "include hd.cfg" >> "$WRKDIR"/cddir/boot/isolinux/grmlmain.cfg
+# }}}
+# change to $WRKDIR {{{
+ # make sure $WRKDIR is an absolute path, otherwise accessing files
+ # in it will fail later in the code path if user provided a
+ # relative directory
+ WRKDIR=$(realpath $WRKDIR)
cd "$WRKDIR/cddir"
- echo "menu label ^Isolinux prompt" > boot/isolinux/promptname.cfg
- echo "include hd.cfg" >> boot/isolinux/grmlmain.cfg
# }}}
# efi boot {{{
# default, independent of UEFI support
BOOT_ARGS="-no-emul-boot -boot-load-size 4 -boot-info-table -b boot/isolinux/isolinux.bin -c boot/isolinux/boot.cat"
+ UEFI_ENABLE=false
case "$MKISOFS" in
xorriso*)
echo "Disabling (U)EFI boot support since xorriso version is not recent enough."
else
echo "xorriso with -eltorito-alt-boot support present"
+ UEFI_ENABLE=true
if ! [ -r "${WRKDIR}/cddir/boot/efi.img" ] ; then
- echo "File /boot/efi.img not found, not extending boot arguments for (U)EFI boot."
+ echo "Warning: File /boot/efi.img not found, not extending boot arguments for (U)EFI boot."
+ UEFI_ENABLE=false
else
echo "/boot/efi.img found, extending boot arguments for (U)EFI boot."
- BOOT_ARGS="$BOOT_ARGS -boot-info-table -eltorito-alt-boot -e boot/efi.img -no-emul-boot"
+ if ! [ -r /usr/lib/ISOLINUX/isohdpfx.bin ] ; then
+ echo "Error: /usr/lib/ISOLINUX/isohdpfx.bin not available, required for xorriso/isohybrid though." >&2
+ echo "Hint: make sure isolinux is installed." >&2
+ exit 1
+ else
+ BOOT_ARGS+=" -boot-info-table -eltorito-alt-boot -e boot/efi.img -no-emul-boot"
+ BOOT_ARGS+=" -isohybrid-mbr /usr/lib/ISOLINUX/isohdpfx.bin -eltorito-alt-boot -e boot/efi.img -no-emul-boot -isohybrid-gpt-basdat -no-pad"
+ fi
fi
fi
;;
+ *)
+ echo "Using $MKISOFS for ISO generation (lacking UEFI option), disabling (U)EFI boot support."
+ ;;
esac
# }}}
# }}}
# generate the CD/DVD ISO {{{
- $MKISOFS -V 'grml-multiboot' -l -r -J -no-pad $BOOT_ARGS \
+ $MKISOFS -V 'grml-multiboot' -l -r -J $BOOT_ARGS \
-o "$ISOFILE" .
# }}}
-# pad the output ISO to multiples of 256 KiB for partition table support {{{
- siz=$($getfilesize "$ISOFILE")
- cyls=$(($siz / 512 / 32 / 16 + 1)) # C=$cyls H=16 S=32
- ofs=$(($cyls * 16 * 32 * 512 - 1)) # padding offset (size - 1)
- dd if=/dev/zero bs=1 count=1 seek=$ofs of="$ISOFILE" 2>/dev/null
-# }}}
-
-# make ISO dd-able {{{
- if isohybrid --help | grep -q -- --uefi ; then
- echo "isohybrid version supports --uefi option, enabling"
- ISOHYBRID_OPTIONS=--uefi
- else
- echo "isohybrid version does NOT support --uefi option, disabling"
- fi
-
- echo "Creating dd-able ISO using isohybrid"
- isohybrid $ISOHYBRID_OPTIONS "$ISOFILE"
-# }}}
-
# cleanup {{{
cd "$ORIG_DIR"
sync
# }}}
## EOF #########################################################################
-# vim:foldmethod=marker ts=2 ft=sh ai expandtab tw=80 sw=3
+# vim:foldmethod=marker ts=2 ft=sh ai expandtab tw=80 sw=2
projects / grml2usb.git / blobdiff