90 lines
2.6 KiB
Bash
Executable file
90 lines
2.6 KiB
Bash
Executable file
#!/bin/bash
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# snap-pac
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# https://github.com/wesbarnett/snap-pac
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# Copyright (C) 2016 James W. Barnett
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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 of the License, or
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# (at your option) any later version.
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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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 along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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# Main script.
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set -e
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if [[ $EUID -ne 0 ]]; then
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echo "ERROR: Script must be run as root."
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exit 1
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fi
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if [[ $# -ne 1 ]]; then
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echo "ERROR: Only one argument should be passed to this script."
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exit 1
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fi
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if [[ $1 != "pre" ]] && [[ $1 != "post" ]]; then
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echo "ERROR: First argument should either be 'pre' or 'post'."
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exit 1
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fi
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declare -r pre_or_post=$1
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declare -r prefile_prefix="/tmp/snap-pac-pre"
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declare -r pacman_cmd="$(sed 's./usr/bin/pacman.pacman.g' <(ps -C pacman -o args=))"
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declare -r snapper_config_dir="/etc/snapper/configs"
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declare -r configurations="$(find $snapper_config_dir/* -printf '%f\t\0')"
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for x in $configurations; do
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(
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source $snapper_config_dir/$x
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if [[ $x == "root" ]]; then
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take_snapshot=${PACMAN_PRE_POST:-"yes"}
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else
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take_snapshot=${PACMAN_PRE_POST:-"no"}
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fi
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[[ $take_snapshot != "yes" ]] && exit 0
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cleanupalgo=${PACMAN_CLEANUP_ALGORITHM:-"number"}
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if [[ "$pre_or_post" == "pre" ]]; then
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description=${PACMAN_PRE_DESCRIPTION:-"$pacman_cmd"}
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snapper --config $x create --type $pre_or_post --cleanup-algorithm $cleanupalgo --print-number --description "$description" > $prefile_prefix"_"$x
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exit 0
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elif [[ "$pre_or_post" == "post" ]]; then
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if [ -f $prefile_prefix"_"$x ]; then
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description=${PACMAN_POST_DESCRIPTION:-"$pacman_cmd"}
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snapper --config $x create --type $pre_or_post --cleanup-algorithm $cleanupalgo --pre-number $(< $prefile_prefix"_"$x) --description "$description"
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rm $prefile_prefix"_"$x
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exit 0
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else
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echo "WARNING: $prefile_prefix"_"$x does not exist, so no post snapshot will be taken. If you are initially installing snap-pac, this is normal."
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exit 1
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fi
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fi
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) &
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done
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exit 0
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