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#!/bin/bash -euE
# librechroot
# Copyright 2010 Nicolás Reynolds
# Copyright 2011 Joshua Haase
# Copyright 2012 Luke Shumaker
#
# This file is part of Parabola.
#
# Parabola is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Parabola 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 Parabola. If not, see <http://www.gnu.org/licenses/>.
. /etc/libretools.conf
##
# This function is almost verbatim from makechrootpkg
##
sync() {
if [[ $CHROOTCOPY = root ]]; then
error "Cannot sync the root copy with itself"
exit 1
fi
lock_open_read 8 "$rootdir" "Locking clean chroot"
stat_busy 'Creating clean working copy'
local use_rsync=false
if type -P btrfs >/dev/null; then
[[ -d $copydir ]] && btrfs subvolume delete "$copydir" &>/dev/null
btrfs subvolume snapshot "$chrootdir/root" "$copydir" &>/dev/null || use_rsync=true
else
use_rsync=true
fi
if $use_rsync; then
mkdir -p "$copydir"
rsync -a --delete -q -W -x "$CHROOTDIR/$CHROOT/root/" "$copydir"
fi
stat_done
lock_close 8
}
cmd=${0##*/}
usage() {
echo "Usage: $cmd [OPTIONS] [CHROOT] "
echo 'Interacts with a chroot.'
echo ''
echo "The default CHROOT is \`${CHROOT}'."
echo ''
echo 'Options:'
echo ' Settings:'
echo ' -l <COPY> Use this as the chroot copy instead of basing it'
echo ' on the username'
echo ' -N Disable networking in the chroot'
echo ''
echo ' Modes: (the last mode given will be used)'
echo ' -C Clean /repo in the chroot'
echo ' -c Clean the packages installed in the chroot'
echo ' -I <FILE> Install the package FILE into the chroot'
echo ' -i <PKG> Install the package PKG from repos into the chroot'
echo ' -n No-op, just make sure that the chroot exists'
echo ' -r <CMD> Run CMD in the chroot'
echo " -s Sync the copy with the 'root' copy"
echo ' -u Update the chroot'
echo ' -h Print this message'
}
main() {
CHROOTCOPY=$LIBREUSER
[[ $CHROOTCOPY != root ]] || CHROOTCOPY=copy
local mode=enter
local archroot_args=(-f)
local ARG=''
while getopts 'l:NCcI:i:nrsuh' arg; do
case $arg in
l) CHROOTCOPY=$OPTARG;;
N) archroot_args+=(-N);;
C) mode=clean_repo;;
c) mode=clean_pacman;;
I) mode=install_file; ARG=$OPTARG;;
i) mode=install_pkg; ARG=$OPTARG;;
n) mode=noop;;
r) mode=run; ARG=$OPTARG;;
s) mode=sync;;
u) mode=update;;
h) usage; exit 0;;
*) usage; exit 1;;
esac
done
shift $(($OPTIND - 1))
case $# in
0) :;;
1) CHROOT="$1";;
*) usage; exit 1;;
esac
# not local
rootdir="${CHROOTDIR}/${CHROOT}/root"
copydir="${CHROOTDIR}/${CHROOT}/${CHROOTCOPY}"
if (( EUID )); then
error "This script must be run as root."
exit 1
fi
# Keep this lock as long as we are running
# Note that '9' is the same FD number as in (mk)archroot
lock_open_write 9 "$copydir" "Locking chroot copy '$CHROOTCOPY'"
if [[ ! -d $rootdir ]]; then
libremkchroot "$CHROOT"
fi
if [[ ! -d $copydir ]] && [[ $mode != sync ]]; then
sync
fi
case "$mode" in
clean_repo)
msg "Cleaning local pacman repository"
rm -rf "${copydir}/repo"
mkdir "${copydir}/repo"
bsdtar -czf "${copydir}/repo/repo.db.tar.gz" -T /dev/null
ln -s "repo.db.tar.gz" "${copydir}/repo/repo.db"
;;
clean_pacman)
msg "Intelligently cleaning packages"
cp -a "$(dirname $0)/chcleanup" "${copydir}/clean"
echo '#!/bin/bash' > "${copydir}/cleanstrap"
echo 'mkdir /build' >> "${copydir}/cleanstrap"
echo 'cd /build; /clean' >> "${copydir}/cleanstrap"
chmod 755 "${copydir}/cleanstrap"
archroot "${archroot_args[@]}" "${copydir}" -r /cleanstrap
;;
install_file)
msg "Installing package file: $ARG"
cp "$ARG" "$copydir/${ARG##*/}"
archroot "${archroot_args[@]}" "$copydir" -r "pacman -U /${ARG##*/} --noconfirm"
rm "$copydir/${ARG##*/}"
;;
install_pkg)
msg "Installing package(s): $ARG"
archroot "${archroot_args[@]}" "$copydir" -i $ARG
;;
noop) :;;
run)
msg "Running command"
archroot "${archroot_args[@]}" "${copydir}" -r "$ARG"
;;
sync) sync;;
update)
msg "Updating chroot"
archroot "${archroot_args[@]}" "${copydir}" -u
;;
enter)
msg "Entering chroot"
archroot "${archroot_args[@]}" "${copydir}" -r bash
;;
esac
}
main "$@"
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