#!/usr/bin/env bash script_name="$(basename $(realpath $0))" working_dir="$(dirname $(realpath $0))" conf_file="${working_dir}/conf/${script_name%%.*}.conf" LOCK_DIR="/tmp/$(basename $0).$$.LOCK" log_file="${LOCK_DIR}/${script_name%%.*}.log" backup_date="$(date +%Y-%m-%d-%H%M)" declare -a files_backuped_arr=() declare -a dirs_backuped_arr=() # ---------- # Base Function(s) # ---------- usage() { [[ -n "$1" ]] && error "$1" [[ $terminal ]] && echo -e " \033[1mUsage:\033[m $(basename $0) [OPTION [OPTION .. \033[1mDescription\033[m \033[1mOptions\033[m \033[1mFiles\033[m $conf_file: Configuration file \033[1mExample:\033[m $(basename $0) .. $(basename $0) .. " clean_up 1 } clean_up() { # Perform program exit housekeeping rm -rf "$LOCK_DIR" blank_line exit $1 } echononl(){ if $terminal ; then echo X\\c > /tmp/shprompt$$ if [ `wc -c /tmp/shprompt$$ | awk '{print $1}'` -eq 1 ]; then echo -e -n " $*\\c" 1>&2 else echo -e -n " $*" 1>&2 fi rm /tmp/shprompt$$ fi } fatal(){ echo "" if $terminal ; then echo -e " [ \033[31m\033[1mFatal\033[m ] $*" else echo -e " [ Fatal ] $*" fi echo "" if $terminal ; then echo -e " \033[1mScript terminated\033[m.." else echo -e " Script terminated.." fi echo "" rm -rf $LOCK_DIR exit 1 } error (){ echo "" if $terminal ; then echo -e " [ \033[31m\033[1mError\033[m ] $*" else echo " [ Error ] $*" fi echo "" } warn (){ if $LOGGING || $terminal ; then echo "" if $terminal ; then echo -e " [ \033[33m\033[1mWarn\033[m ] $*" else echo " [ Warn ] $*" fi echo "" fi } info (){ if $LOGGING || $terminal ; then echo "" if $terminal ; then echo -e " [ \033[32m\033[1mInfo\033[m ] $*" else echo " [ Info ] $*" fi echo "" fi } ok (){ if $LOGGING || $terminal ; then echo "" if $terminal ; then echo -e " [ \033[32m\033[1mOk\033[m ] $*" else echo " [ Ok ] $*" fi echo "" fi } echo_done() { if $terminal ; then echo -e "\033[75G[ \033[32mdone\033[m ]" fi } echo_ok() { if $terminal ; then echo -e "\033[75G[ \033[32mok\033[m ]" fi } echo_warn() { if $terminal ; then echo -e "\033[75G[ \033[33mwarn\033[m ]" fi } echo_failed(){ if $terminal ; then echo -e "\033[75G[ \033[1;31mfailed\033[m ]" fi } echo_skipped() { if $terminal ; then echo -e "\033[75G[ \033[37m\033[1mskipped\033[m ]" fi } echo_wait(){ if $terminal ; then echo -en "\033[75G[ \033[5m\033[1m...\033[m ]" fi } trim() { local var="$*" var="${var#"${var%%[![:space:]]*}"}" # remove leading whitespace characters var="${var%"${var##*[![:space:]]}"}" # remove trailing whitespace characters echo -n "$var" } blank_line() { if $terminal ; then echo "" fi } # - Backup file or directory # - backup() { is_directory=false if [[ -z "$1" ]] ; then error "No file/directory for backup given!" return elif [[ -h "$1" ]] ; then _source="$(realpath $1)" warn "'$1' is a symlink to $_source." elif [[ ! -d "$1" ]] && [[ ! -f "$1" ]] ; then warn "'$1' not found. Backup skipped." return else _source="$(realpath $1)" fi if [[ -d "$_source" ]]; then is_directory=true echononl "Backup directory '$_source' .." else echononl "Backup file '$_source' .." fi cp -a "$_source" "${_source}.$backup_date" > $log_file 2>&1 if [[ $? -eq 0 ]] ; then echo_ok if $is_directory ; then dirs_backuped_arr+=("$_source") else files_backuped_arr+=("$_source") fi else echo_failed error "$(cat "$log_file")" fi } # - Remove script generated backups, if source wasn't changed # - rm_unchanged_backup() { if [[ ${#files_backuped_arr[@]} -gt 0 ]] ; then for _file in "${files_backuped_arr[@]}" ; do if $(diff "$_file" "${_file}.$backup_date" > /dev/null 2>&1) ; then echononl "File '$(basename "${_file}")' wasn't changed.\n Delete the previous generated backup. .." rm "${_file}.$backup_date" > "$log_file" 2>&1 if [[ $? -eq 0 ]]; then echo_ok else echo_failed error "$(cat "$log_file")" fi blank_line fi done fi if [[ ${#dirs_backuped_arr[@]} -gt 0 ]] ; then for _dir in "${dirs_backuped_arr[@]}" ; do if $(diff -Nur "$_dir" "${_dir}.$backup_date" > /dev/null 2>&1) ; then echononl "Directory '$(basename "${_dir}")' wasn't changed.\n Delete the previous generated backup. .." rm -rf "${_dir}.$backup_date" > "$log_file" 2>&1 if [[ $? -eq 0 ]]; then echo_ok else echo_failed error "$(cat "$log_file")" fi blank_line fi done fi } # ---------- # - Jobhandling # ---------- # - Run 'clean_up' for signals SIGHUP SIGINT SIGTERM # - trap clean_up SIGHUP SIGINT SIGTERM # - Create lock directory '$LOCK_DIR" # mkdir "$LOCK_DIR" # ---------- # - Some checks .. # ---------- # - Running in a terminal? # - if [[ -t 1 ]] ; then terminal=true else terminal=false fi # -Is systemd supported on this system? # - systemd_supported=false systemd=$(which systemd) systemctl=$(which systemctl) if [[ -n "$systemd" ]] && [[ -n "$systemctl" ]] ; then systemd_supported=true fi # - Print help? # - if [[ "$(trim $*)" = "-h" ]] || [[ "$(trim $*)" = "--help" ]] ; then usage fi if [[ -z "$(which basename)" ]]; then fatal 'It seems "basename" is not installed, but needed!' fi if [[ -z "$(which realpath)" ]]; then fatal 'It seems "realpath" is not installed, but needed!' fi # ========== # - Begin Main Script # ========== # ---------- # - Headline # ---------- if $terminal ; then echo "" echo -e "\033[1m----------\033[m" echo -e "\033[32m\033[1mRunning script \033[m\033[1m$script_name\033[32m .. \033[m" echo -e "\033[1m----------\033[m" fi # ---------- # Read Configurations from $conf_file # ---------- # - Give your default values here # - LOGGING=false BATCH_MODE=false PARAMETER_1="WERT_1" PARAMETER_2="WERT_2" if [[ -f "$conf_file" ]]; then source "$conf_file" else warn "No configuration file '$conf_file' present.\n Loading default values.." fi # ---------- # - Read commandline parameter # ---------- while getopts bh opt ; do case $opt in b) BATCH_MODE=true ;; h) usage ;; \?) usage ;; esac done # ---------- # - Read in parameters given by user # ---------- if $terminal && ! $BATCH_MODE ; then echo "" echo "" echo -e " \033[1mRead in parameters given by user ..\033[m" echo "" echo "" echo -e "\033[32m--\033[m" echo "" echo " PARAMETER 1 ...." echo "" echo -e " Type \033[33m\033[m to accept the default." echo "" echo "" _PARAMETER_1=$PARAMETER_1 PARAMETER_1="" echononl "PARAMETER 1 [\033[1m$_PARAMETER_1\033[m]: " read PARAMETER_1 if [[ -z "$PARAMETER_1" ]] ; then PARAMETER_1=$_PARAMETER_1 fi echo "" echo -e "\033[32m--\033[m" echo "" echo " Blank separated list of PARAMETER 2" echo "" if [[ -n "$PARAMETER_2" ]]; then echo -e " Type \033[33m\033[m to accept the default." echo "" echo "" _PARAMETER_2=$PARAMETER_2 PARAMETER_2="" echononl "PARAMETER 2 [\033[1m$_PARAMETER_2\033[m]: " read PARAMETER_2 if [[ -z "$PARAMETER_2" ]] ; then PARAMETER_2=$_PARAMETER_2 fi else echo "" echononl "\033[1mPARAMETER 2:\033[m " read PARAMETER_2 while [[ -z "$(trim "$PARAMETER_2")" ]]; do echo "Entry for PARAMETER 2 is required! Try again.." echononl "\033[1mPARAMETER 2: \033[m" read PARAMETER_2 done fi echo "" echo "" echo -e " \033[32m\033[1mParameter Summary:\033[m" echo "" echo " PARAMETER 1................: $PARAMETER_1" echo " PARAMETER 2................: $PARAMETER_2" echo "" echononl "Continue with this parameters? [\033[1myes/no\033[m]: " read OK while [[ "${OK,,}" != "yes" ]] && [[ "${OK,,}" != "no" ]] ; do echononl "\033[33mWrong entry!\033[m [\033[1myes/no\033[m]: " read OK done [[ "${OK,,}" = "yes" ]] || fatal "Canceled by user input." fi # ---------- # - Some pre-script tasks .. # ---------- if $terminal ; then echo "" echo "" echo -e " \033[1mDoing some pre-script tasks ..\033[m" echo "" fi echononl "-- All is fine --" echo_ok # ---------- # - Main part of script # ---------- if $terminal ; then echo "" echo "" echo -e " \033[1mMain part of script ..\033[m" echo "" fi # ---------- # - Some post-script tasks .. # ---------- if $terminal ; then echo "" echo "" echo -e " \033[1mDoing some post-script tasks ..\033[m" echo "" fi # - Remove generated backup file if source wasn't changed. # - rm_unchanged_backup clean_up 0