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#! /bin/sh
# This file is part of BEAM
# Copyright (C) 2012-2014 Sergey Poznyakoff
#
# BEAM 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, or (at your option)
# any later version.
#
# BEAM 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 BEAM.  If not, see <http://www.gnu.org/licenses/>.

libdir=@LIBDIR@/beam
set -e
. $libdir/common.sh
set +e
ts=`date +%Y%m%d`;
week=`date +%U`

if [ "$1" = "--wtf" ]; then
    wtf $(basename $0) create a backup
    exit 0
fi

load_config
taroptions="-c -Hpax $backup_tar_options $backup_rsh_command"

###########################################################
# Global variables
###########################################################

# Set it to "-v" to make script verbose
if [ -n "$backup_verbose" ]; then 
    verbose=-v
else
    verbose=
fi
# Set it to "echo" to initiate dry-run mode.
unset dry_run

# Number of tar errors detected during the run
tarerror=0

level=0
round=0

###########################################################
# Utility functions
###########################################################

help() {
    cat <<EOF
usage: $0 [OPTIONS]
makes incremental backup of that system

OPTIONS:

  -v, --verbose        increase verbosity
  -l, --logfile FILE   log to FILE (default $backup_logfile)
  -n, --dry-run        do nothing, print what would have been done
  -N, --no-logfile     log to stderr
  -L, --level N        create incremental dump level N
  -R, --round N        mark archives with incremental round N
  --week N             force using week number N instead of the current one
  -h, --help           produce this help list

Report bugs to <@PACKAGE_BUGREPORT@>
EOF
    exit 0
}

###########################################################
# Main
###########################################################

while [ $# -ne 0 ]
do
    case $1 in
	-v|--verbose) verbose="$verbose -v";;
	-l|--logfile) shift; backup_logfile=$1;;
	-n|--dry-run) dry_run=echo; backup_logfile=;;
	-N|--no-logfile) backup_logfile=;;
	-h|--help) help;;
	-V|--version) print_version;;
	-L|--level) shift; level=$1;;
	-R|--round) shift; round=$1;;
	--week) shift; week=$1;;
	*) echo >&2 "$0: unrecognized option $1"; exit 1;;
    esac
    shift
done

backup() {
    logit "started"
    
    runhook prologue_hook
    trap "runhook epilogue_hook" EXIT INT QUIT TERM
    
    if test -n "$backup_retain_interval" &&
	test $backup_retain_interval -gt 0; then
	@LIBEXECDIR@/beam-cleaner --retain $backup_retain_interval $verbose \
                ${dry_run+--dry-run} --suffix $backup_suffix $backup_archive_dir
	@LIBEXECDIR@/beam-cleaner --retain $backup_retain_interval $verbose \
                ${dry_run+--dry-run} --suffix .db $backup_snapshot_dir
    fi

    for item in $backup_items
    do
	eval type=\$${item}_type
	${type}_backup $item
    done
    
    trap - EXIT INT QUIT TERM
    runhook epilogue_hook
    
    logit "finished"
}

umask ${backup_umask:-077}
prologue_hook="beam_lock $prologue_hook"

if [ -n "$backup_logfile" ]; then
    runhook openlog_hook
    exec >>$backup_logfile
    exec 2>&1
fi
if [ -z "$backup_notify_email" ]; then
    backup
else
    report=$backup_snapshot_dir/report.$$
    touch $report
    backup 2>&1 | tee $report
    mail_report $report
    rm $report
fi


# finis coronat opus

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