162 lines
4.2 KiB
Bash
Executable file
162 lines
4.2 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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function kill_exit
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{
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printf "\nExited due to user intervention.\n"
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exit 1
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}
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trap kill_exit SIGTERM SIGINT
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SNAPPER_CONFIG_FILE=/etc/conf.d/snapper
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ERRORMSG=" \033[00;31mERROR:\033[00m"
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WARNINGMSG=" \033[00;33mWARNING:\033[00m"
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PACMAN_ABORT_ON_FAIL="no"
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# Virtual console fonts don't have the unicode checkmark
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if [[ "$TERM" == "linux" ]]; then
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checkmark="done"
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# Ensure user is using UTF locale
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elif [[ $(awk '/UTF-8/' <(echo $LANG)) ]]; then
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checkmark="✓"
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else
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checkmark="done"
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fi
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if [[ -f "$SNAPPER_CONFIG_FILE" ]]; then
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source "$SNAPPER_CONFIG_FILE"
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else
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printf "%b %s does not exist!\n" "$ERRORMSG" "$SNAPPER_CONFIG_FILE"
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exit 1
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fi
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if [[ $EUID -ne 0 ]]; then
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printf "%b Script must be run as root.\n" "$ERRORMSG"
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if [[ $PACMAN_ABORT_ON_FAIL == "yes" ]]; then
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exit 1
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else
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exit 0
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fi
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fi
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if [[ ! -d /var/run/dbus ]]; then
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printf "%b Unable to use snapper without dbus. Are you in a chroot environment?\n" "$ERRORMSG"
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if [[ $PACMAN_ABORT_ON_FAIL == "yes" ]]; then
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exit 1
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else
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exit 0
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fi
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fi
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if [[ $# -ne 1 ]]; then
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printf "%b Only one argument should be passed to this script.\n" "$ERRORMSG"
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if [[ $PACMAN_ABORT_ON_FAIL == "yes" ]]; then
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exit 1
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else
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exit 0
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fi
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fi
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if [[ $1 != "pre" ]] && [[ $1 != "post" ]]; then
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printf "%b First argument should either be 'pre' or 'post'.\n" "$ERRORMSG"
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if [[ $PACMAN_ABORT_ON_FAIL == "yes" ]]; then
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exit 1
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else
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exit 0
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fi
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fi
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if [[ -z "$SNAPPER_CONFIGS" ]]; then
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printf "%b No snapper configurations found, so not taking any snapshots!\n" "$ERRORMSG"
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if [[ $PACMAN_ABORT_ON_FAIL == "yes" ]]; then
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exit 1
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else
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exit 0
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fi
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fi
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declare -r pre_or_post=$1
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declare pacman_cmd
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pacman_cmd="$(sed 's./usr/bin/pacman.pacman.g' <(ps -C pacman -o args=))"
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if [[ -z "$pacman_cmd" ]]; then
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pacman_cmd="pacman"
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fi
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declare -i x=0
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for CONFIG in $SNAPPER_CONFIGS; do
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# Set defaults
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PACMAN_PRE_POST="no"
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if [[ $CONFIG == "root" ]]; then
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PACMAN_PRE_POST="yes"
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fi
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PACMAN_PRE_DESCRIPTION="$pacman_cmd"
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PACMAN_POST_DESCRIPTION="$pacman_cmd"
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PACMAN_CLEANUP_ALGORITHM="number"
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# Source snapper configuration to override defaults
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source /etc/snapper/configs/"$CONFIG"
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printf " %s " "$CONFIG"
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if [[ $PACMAN_PRE_POST == "yes" ]]; then
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prefile="/tmp/snap-pac-pre_$CONFIG"
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snapper_cmd="snapper --config $CONFIG create --type $pre_or_post --cleanup-algorithm $PACMAN_CLEANUP_ALGORITHM"
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x=$((x+1))
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if [[ "$pre_or_post" == "pre" ]]; then
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$snapper_cmd --description "$PACMAN_PRE_DESCRIPTION" --print-number > "$prefile"
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printf "%s %s\n" "$(< "$prefile")" "$checkmark"
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elif [[ -f $prefile ]]; then
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postnum=$($snapper_cmd --description "$PACMAN_POST_DESCRIPTION" --print-number --pre-number "$(< "$prefile")")
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printf "%s %s\n" "$postnum" "$checkmark"
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rm "$prefile"
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else
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printf "%b %s does not exist, so no post snapshot will be taken. If you are initially installing snap-pac, this is normal.\n" "$WARNINGMSG" "$prefile"
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fi
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else
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printf "N/A\n"
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fi
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done
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if [[ $x -eq 0 ]]; then
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printf "%b No snapper configurations are set up for snapshots to be taken!\n" "$ERRORMSG"
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if [[ $PACMAN_ABORT_ON_FAIL == "yes" ]]; then
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exit 1
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else
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exit 0
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fi
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fi
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exit 0
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