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|
#!/bin/bash
#set -x
# get path to all needed tools
# /bin
date=$(which date)
echo=$(which echo)
grep=$(which grep)
mktemp=$(which mktemp)
mv=$(which mv)
pwd=$(which pwd)
rm=$(which rm)
sed=$(which sed)
# /usr/bin
cut=$(which cut)
dirname=$(which dirname)
expr=$(which expr)
head=$(which head)
nice=$(which nice)
ssh=$(which ssh)
tail=$(which tail)
# check if all needed tools are installed (only the ones not installed under /bin/)
alltoolsinstalled="yes"
test "$cut" = "" && $echo "'cut' not installed or not found by 'which'" && alltoolsinstalled="no"
test "$dirname" = "" && $echo "'dirname' not installed or not found by 'which'" && alltoolsinstalled="no"
test "$expr" = "" && $echo "'expr' not installed or not found by 'which'" && alltoolsinstalled="no"
test "$head" = "" && $echo "'head' not installed or not found by 'which'" && alltoolsinstalled="no"
test "$nice" = "" && $echo "'nice' not installed or not found by 'which'" && alltoolsinstalled="no"
test "$ssh" = "" && $echo "'ssh' not installed or not found by 'which'" && alltoolsinstalled="no"
test "$tail" = "" && $echo "'tail' not installed or not found by 'which'" && alltoolsinstalled="no"
if [ "$alltoolsinstalled" = "no" ]
then
exit 1
fi
# main configuration
script_dir="$( cd "$( $dirname "${BASH_SOURCE[0]}" )" && $pwd )"
config_file="$script_dir/main.cfg"
# timestamps yyyy-mm-dd and unixtime for calculating
backup_stamp=$($date +%F)
backup_time=$($date -d$backup_stamp +%s)
# source a specified section from a specified config
function source_section {
config_name="$1"
section_name="$2"
section_start="^\[$section_name\]$"
section_end="^\[/$section_name\]$"
line_start=$($grep -n "$section_start" "$config_name" | $cut -d: -f1)
line_end=$($expr $($grep -n "$section_end" "$config_name" | $cut -d: -f1) - 1)
line_diff=$($expr $line_end - $line_start)
tmp_file=$($mktemp)
$head -n $line_end "$config_name" | $tail -n $line_diff > "$tmp_file"
source "$tmp_file"
$rm -f "$tmp_file"
}
# check if borg repo exists and create if not
function check_borg_repo {
repo="$1"
serverdir="$2"
usesamerepo="$3"
ret=0
if [ "$usesamerepo" = "yes" ]
then
repo_path="$userserver:$backupdir/$serverdir"
else
repo_path="$userserver:$backupdir/$serverdir/$repo"
fi
#check if repo exists
$nice $borg_local_path list --remote-path "$borg_remote_path" "$repo_path" > /dev/null 2>&1
if [ $? -ne 0 ]
then
# create repo if not exists
$nice $borg_local_path init --remote-path "$borg_remote_path" --encryption "$borg_encryption" "$repo_path"
if [ $? -ne 0 ]
then
$echo "problem in borg init $repo"
ret=1
fi
fi
return $ret
}
# backup single dir with borg
function backup_dir {
repo="$1"
serverdir="$2"
logfileentry="$3"
usesamerepo="$4"
check_borg_repo "$repo" "$serverdir" "$usesamerepo"
if [ $? -ne 0 ]
then
return 1
fi
# to get backup.ignore work with relative paths we need to change the directory
pushd "$repo" > /dev/null
if [ "$usesamerepo" = "yes" ]
then
repo_path="$userserver:$backupdir/$serverdir::$repo-{now:$default_timestamp}"
else
repo_path="$userserver:$backupdir/$serverdir/$repo::{now:$default_timestamp}"
fi
ret=0
if [ -f "backup.ignore" ]
then
$nice $borg_local_path create --remote-path "$borg_remote_path" --one-file-system --exclude-from "backup.ignore" --compression "$borg_compression" "$repo_path" .
ret=$?
else
$nice $borg_local_path create --remote-path "$borg_remote_path" --one-file-system --compression "$borg_compression" "$repo_path" .
ret=$?
fi
popd > /dev/null
if [ $ret -eq 0 ]
then
$sed -e "s/^$logfileentry .*$/${logfileentry} $backup_time/" "$logfile" > "$logfile.tmp"
$mv -f "$logfile.tmp" "$logfile"
else
$echo "problem in borg create $repo"
fi
return 0
}
# general section from main config
source_section "$config_file" "general"
# handle all specified configs
for config_single in $configs
do
# does the configuration file exists?
config_act="$confdir/$config_single"
if [ -e "$config_act" ]
then
# reset default settings
usesamerepo="no"
# general section from specific config
source_section "$config_act" "general"
# change folder for backup
pushd "$rootdir" > /dev/null
# handle all specified folders
for dir_single in $dirssingle
do
# check if folder exists
if [ -e "$dir_single" ]
then
# section for specified folder
source_section "$config_act" "$dir_single"
# rotate is done through days, so we have to know the interval in sections
rotate_stamp=$($expr $time \* 24 \* 60 \* 60)
# for new configurations that does not have a last timestamp we create a zero one
$grep "^${config_single}_$dir_single " $logfile > /dev/null 2>&1
if [ $? -ne 0 ]
then
$echo "${config_single}_$dir_single 0" >> $logfile
fi
# get the stamp for the last backup
last_stamp=$($grep "^${config_single}_$dir_single " $logfile | $cut -d" " -f2)
# get the stamp for the next backup
now_stamp=$($expr $last_stamp + $rotate_stamp)
do_backup="no"
# check wether it is time to do a backup by time and also month
if [ $now_stamp -le $backup_time ]
then
do_backup="yes"
fi
# now we are sure to do a backup
if [ "$do_backup" = "yes" ]
then
# backup everything
backup_dir "$dir_single" "$backupdirsingle" "${config_single}_$dir_single" "$usesamerepo"
fi # if [ "$do_backup" = "yes" ]
fi # if [ -e "$dir_single" ]
done # for dir_single in $dirssingle
# go back
popd > /dev/null
fi # if [ -e "$config_act" ]
done # for config_single in $configs
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