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157 lines
5.3 KiB
Bash
157 lines
5.3 KiB
Bash
#!/bin/sh
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#
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# polystrap - create a foreign architecture rootfs using multistrap, fakeroot,
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# fakechroot and qemu usermode emulation
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#
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# Copyright (C) 2011 by Johannes 'josch' Schauer <j.schauer@email.de>
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM,OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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set -ex
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usage() {
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echo "Usage: $0: [-s suite] [-a arch] [-d directory] [-m mirror] [-p packages] platform\n"
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}
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export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true LC_ALL=C LANGUAGE=C LANG=C
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if [ "$FAKEROOTKEY" = "" ]; then
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echo "re-executing script inside fakeroot"
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fakeroot "$0" "$@";
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exit
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fi
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while getopts s:a:d:m:p: opt; do
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case $opt in
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s) _SUITE="$OPTARG";;
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a) _ARCH="$OPTARG";;
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d) _ROOTDIR="$OPTARG";;
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m) _MIRROR="$OPTARG";;
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p) _PACKAGES="$OPTARG";;
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?) usage; exit 1;;
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esac
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done
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shift $(($OPTIND - 1))
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[ "$#" -ne 1 ] && { echo "too many positional arguments"; usage; exit; }
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PLATFORM="$1"
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[ ! -r "$PLATFORM" ] && { echo "cannot find target directory: $PLATFORM"; exit; }
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[ ! -r "$PLATFORM/multistrap.conf" ] && { echo "cannot read multistrap config: $PLATFORM/multistrap.conf"; exit; }
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[ ! -r "$PLATFORM/hooks" ] && { echo "cannot read hooks directory: $PLATFORM/hooks"; exit; }
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[ ! -r "$PLATFORM/root" ] && { echo "cannot read root directory: $PLATFORM/root"; exit; }
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# source default options
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. "default/config"
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# overwrite default options by target options
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[ -r "$PLATFORM/config" ] && . "$PLATFORM/config"
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# overwrite target options by commandline options
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SUITE=${_SUITE:-$SUITE}
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ARCH=${_ARCH:-$ARCH}
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ROOTDIR=${_ROOTDIR:-$ROOTDIR}
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MIRROR=${_MIRROR:-$MIRROR}
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if [ "$_PACKAGES" = "" ] && [ -r "$PLATFORM/packages" ]; then
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# if no packages were given by commandline, read from package files
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for f in $PLATFORM/packages/*; do
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while read line; do PACKAGES="$PACKAGES $line"; done < "$f"
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done
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else
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# otherwise set as given by commandline
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PACKAGES="$_PACKAGES"
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fi
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# binutils must always be installed for objdump for fake ldd
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PACKAGES="$PACKAGES binutils"
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echo "--------------------------"
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echo "suit: $SUITE"
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echo "arch: $ARCH"
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echo "root: $ROOTDIR"
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echo "mirr: $MIRROR"
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echo "pkgs: $PACKAGES"
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echo "--------------------------"
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[ -e "$ROOTDIR.tar" ] && { echo "tarball still exists"; exit; }
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[ -e "$ROOTDIR" ] && { echo "root directory still exists"; exit; }
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# create multistrap.conf
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echo -n > /tmp/multistrap.conf
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while read line; do
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eval echo $line >> /tmp/multistrap.conf
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done < $PLATFORM/multistrap.conf
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# download and extract packages
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multistrap -f /tmp/multistrap.conf
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# backup ldconfig and ldd
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mv $ROOTDIR/sbin/ldconfig $ROOTDIR/sbin/ldconfig.REAL
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mv $ROOTDIR/usr/bin/ldd $ROOTDIR/usr/bin/ldd.REAL
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# copy initial directory tree - dereference symlinks
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cp --recursive --dereference $PLATFORM/root/* $ROOTDIR/
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# copy qemu usermode binary
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if [ $ARCH != "`dpkg --print-architecture`" ]; then
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case $ARCH in
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alpha|arm|armeb|i386|m68k|mips|mipsel|ppc64|sh4|sh4eb|sparc|sparc64)
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cp `which qemu-$ARCH-static` $ROOTDIR/usr/bin;;
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amd64) cp `which qemu-x86_64-static` $ROOTDIR/usr/bin;;
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armel) cp `which qemu-arm-static` $ROOTDIR/usr/bin;;
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lpia) cp `which qemu-i386-static` $ROOTDIR/usr/bin;;
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powerpc) cp `which qemu-ppc-static` $ROOTDIR/usr/bin;;
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*) echo "unknown architecture: $ARCH"; exit 1;;
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esac
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fi
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# preseed debconf
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if [ -r "$PLATFORM/debconfseed.txt" ]; then
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cp "$PLATFORM/debconfseed.txt" $ROOTDIR/tmp/
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fakechroot chroot $ROOTDIR debconf-set-selections /tmp/debconfseed.txt
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rm $ROOTDIR/tmp/debconfseed.txt
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fi
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# run preinst scripts
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for script in $ROOTDIR/var/lib/dpkg/info/*.preinst; do
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[ "$script" = "$ROOTDIR/var/lib/dpkg/info/bash.preinst" ] && continue
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fakechroot chroot $ROOTDIR ${script##$ROOTDIR} install
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done
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# run dpkg --configure -a twice because of errors during the first run
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fakechroot chroot $ROOTDIR /usr/bin/dpkg --configure -a || fakechroot chroot $ROOTDIR /usr/bin/dpkg --configure -a
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# source hooks
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for f in $PLATFORM/hooks/*; do
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. $f
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done
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#cleanup
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rm $ROOTDIR/sbin/ldconfig $ROOTDIR/usr/bin/ldd
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mv $ROOTDIR/sbin/ldconfig.REAL $ROOTDIR/sbin/ldconfig
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mv $ROOTDIR/usr/bin/ldd.REAL $ROOTDIR/usr/bin/ldd
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rm $ROOTDIR/usr/sbin/policy-rc.d
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# need to generate tar inside fakechroot so that absolute symlinks are correct
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# tar is clever enough to not try and put the archive inside itself
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fakechroot chroot $ROOTDIR tar -cf $ROOTDIR.tar -C / .
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mv $ROOTDIR/$ROOTDIR.tar .
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