#! /bin/sh # This program is part of GNU tar # Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc. # # This program 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 1, or (at your option) # any later version. # # This program 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 this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA # 02110-1301, USA. PROGNAME=`basename $0` CONFIGPATH="$SYSCONFDIR/backup" REMOTEBACKUPDIR="$SYSCONFDIR/tar-backup" CONFIGFILE=${CONFIGPATH}/backup-specs DIRLIST=${CONFIGPATH}/dirs FILELIST=${CONFIGPATH}/files LOGPATH=${CONFIGPATH}/log # Default functions for running various magnetic tape commands mt_begin() { $MT -f "$1" retension } mt_rewind() { $MT -f "$1" rewind } mt_offline() { $MT -f "$1" offl } mt_status() { $MT -f "$1" status } # The main configuration file may override any of these variables MT_BEGIN=mt_begin MT_REWIND=mt_rewind MT_OFFLINE=mt_offline MT_STATUS=mt_status # Insure `mail' is in PATH. PATH="/usr/ucb:${PATH}" export PATH # Put startdate in the subject line of mailed report, since if it happens # to run longer than 24 hours (as may be the case if someone forgets to put # in the next volume of the tape in adequate time), the backup date won't # appear too misleading. startdate="`date`" here="`pwd`" # Save local hostname localhost="`hostname | sed -e 's/\..*//' | tr A-Z a-z`" # Produce a diagnostic output message() { if [ "$VERBOSE" != "" ]; then if [ $VERBOSE -ge $1 ]; then shift echo "$@" >&2 fi fi } # Bail out and exit. bailout() { echo "$PROGNAME: $*" >&2 exit 1 } # Return current date now() { #IF_DATE_FORMAT_OK date +%Y-%m-%d #ELSE_DATE_FORMAT_OK LC_ALL=C date | \ sed 's/[^ ]* *\([^ ]*\) *\([^ ]*\).* \([^ ]*\)$/\3-\1-\2/ /-[0-9]$/s/\([0-9]\)$/0\1/ /Jan/{s/Jan/01/p;q;} /Feb/{s/Feb/02/p;q;} /Mar/{s/Mar/03/p;q;} /Apr/{s/Apr/04/p;q;} /May/{s/May/05/p;q;} /Jun/{s/Jun/06/p;q;} /Jul/{s/Jul/07/p;q;} /Aug/{s/Aug/08/p;q;} /Sep/{s/Sep/09/p;q;} /Oct/{s/Oct/10/p;q;} /Nov/{s/Nov/11/p;q;} /Dec/{s/Dec/12/p;q;}' #ENDIF_DATE_FORMAT_OK } # Bail out if we don't have root privileges. test_root() { if [ ! -w ${ROOT_FS-/} ]; then bailout "The backup must be run as root or else some files will fail to be dumped." fi } root_fs() { echo "${ROOT_FS}$1" | tr -s / } advice() { echo "Directory $1 is not found." >&2 cat >&2 The following directories and files are needed for the backup to function: 1. Directory with configuration files and file lists: $CONFIGPATH 2. Directory for backup log files $LOGPATH 3. Main configuration file $CONFIGFILE Please, create these and invoke the script again. EOF } init_common() { # Check if the necessary directories exist if [ ! -d $CONFIGPATH ]; then advice $CONFIGPATH exit 1 fi if [ ! -d $LOGPATH ]; then if mkdir $LOGPATH; then : else advice $LOGPATH exit 1 fi fi # Get the values of BACKUP_DIRS, BACKUP_FILES, and other variables. if [ ! -r $CONFIGFILE ]; then echo "$PROGNAME: cannot read $CONFIGFILE. Stop." >&2 exit 1 fi . $CONFIGFILE # Environment sanity check test_root if [ x"${ADMINISTRATOR}" = x ]; then bailout "ADMINISTRATOR not defined" fi [ x"$TAR" = x ] && TAR=tar [ x"$SLEEP_TIME" = x ] && SLEEP_TIME=60 if [ x$VOLNO_FILE = x ]; then bailout "VOLNO_FILE not specified" fi if [ -r $DIRLIST ]; then BACKUP_DIRS="$BACKUP_DIRS `cat $DIRLIST`" fi if [ -r $FILELIST ]; then BACKUP_FILES="$BACKUP_FILES `cat $FILELIST`" fi if [ \( x"$BACKUP_DIRS" = x \) -a \( x"$BACKUP_FILES" = x \) ]; then bailout "Neither BACKUP_DIRS nor BACKUP_FILES specified" fi if [ -z "$RSH" ]; then RSH=rsh MT_RSH_OPTION= else MT_RSH_OPTION="--rsh-command=$RSH" fi if [ -z "$TAPE_FILE" ]; then TAPE_FILE=/dev/tape fi # If TAPE_FILE is a remote device, update mt invocation accordingly : ${MT:=mt} case $TAPE_FILE in *:*) MT="$MT $MT_RSH_OPTION";; *) ;; esac POSIXLY_CORRECT=1 export POSIXLY_CORRECT } init_backup() { init_common TAR_PART1="${TAR} -c --format=gnu --multi-volume --one-file-system --sparse --volno-file=${VOLNO_FILE}" if [ "x$XLIST" != x ]; then TAR_PART1="${TAR_PART1} \`test -r $REMOTEBACKUPDIR/$XLIST && echo \"--exclude-from $REMOTEBACKUPDIR/$XLIST\"\`" fi if [ "$RSH_COMMAND" != "" ]; then TAR_PART1="${TAR_PART1} --rsh-command=$RSH_COMMAND" fi if [ x$BLOCKING != x ]; then TAR_PART1="${TAR_PART1} --blocking=${BLOCKING}" fi # Only use --info-script if DUMP_REMIND_SCRIPT was defined in backup-specs if [ "x${DUMP_REMIND_SCRIPT}" != "x" ]; then TAR_PART1="${TAR_PART1} --info-script='${DUMP_REMIND_SCRIPT}'" fi # Set logfile name # Logfile name should be in the form ``log-1993-03-18-level-0'' # They go in the directory `@sysconfdir@/log'. # i.e. year-month-date. This format is useful for sorting by name, since # logfiles are intentionally kept online for future reference. LOGFILE="${LOGPATH}/log-`now`-level-${DUMP_LEVEL}" } init_restore() { init_common # FIXME: Replace --list with --extract TAR_PART1="${TAR} --extract --multi-volume" if [ "$RSH_COMMAND" != "" ]; then TAR_PART1="${TAR_PART1} --rsh-command=$RSH_COMMAND" fi if [ x$BLOCKING != x ]; then TAR_PART1="${TAR_PART1} --blocking=${BLOCKING}" fi # Only use --info-script if DUMP_REMIND_SCRIPT was defined in backup-specs if [ "x${DUMP_REMIND_SCRIPT}" != "x" ]; then TAR_PART1="${TAR_PART1} --info-script='${DUMP_REMIND_SCRIPT}'" fi LOGFILE="${LOGPATH}/restore-`now`" } wait_time() { if [ "${1}" != "now" ]; then if [ "${1}x" != "x" ]; then spec="${1}" else spec="${BACKUP_HOUR}" fi pausetime="`date | awk -v spec=\"${spec}\" ' BEGIN { split(spec, time, ":") } { split($4, now, ":") diff = 3600 * (time[1] - now[1]) + 60 * (time[2] - now[2]); if (diff < 0) diff += 3600 * 24 print diff }'`" clear echo "${SLEEP_MESSAGE}" sleep "${pausetime}" fi } level_log_name() { echo "$REMOTEBACKUPDIR/${1}.level-${2-$DUMP_LEVEL}" } # Prepare a temporary level logfile # usage: make_level_log HOSTNAME make_level_log() { if [ "z${localhost}" != "z$1" ] ; then $RSH "$1" mkdir $REMOTEBACKUPDIR > /dev/null 2>&1 $RSH "$1" rm -f `level_log_name temp` else mkdir $REMOTEBACKUPDIR > /dev/null 2>&1 rm -f `level_log_name temp` fi } # Rename temporary log # usage: flush_level_log HOSTNAME FSNAME flush_level_log() { message 10 "RENAME: `level_log_name temp` --> `level_log_name $2`" if [ "z${localhost}" != "z$1" ] ; then $RSH "$1" mv -f `level_log_name temp` "`level_log_name $2`" else mv -f `level_log_name temp` "`level_log_name $2`" fi } # Return the timestamp of the last backup. # usage: get_dump_time LEVEL get_dump_time() { ls -r ${LOGPATH}/log-*-level-$1 \ | head -n 1 \ | sed "s,.*log-\(.*\)-level-$1,\1," } # Do actual backup on a host # usage: backup_host HOSTNAME [TAR_ARGUMENTS] backup_host() { message 10 "ARGS: $@" rhost=$1 shift if [ "z${localhost}" != "z$rhost" ] ; then $RSH "$rhost" ${TAR_PART1} -f "${localhost}:${TAPE_FILE}" $@ else # Using `sh -c exec' causes nested quoting and shell substitution # to be handled here in the same way rsh handles it. CMD="exec ${TAR_PART1} -f \"${TAPE_FILE}\" $@" message 10 "CMD: $CMD" sh -c "$CMD" message 10 "RC: $?" fi } print_level() { if [ ${1-$DUMP_LEVEL} -eq 0 ]; then echo "Full" else echo "Level ${1-$DUMP_LEVEL}" fi } prev_level() { print_level `expr $DUMP_LEVEL - 1` | tr A-Z a-z } remote_run() { rhost=$1 shift message 10 "REMOTE $rhost: $@" if [ "x$rhost" != "x${localhost}" ] ; then $RSH "${rhost}" "$@" else $* fi } license() { cat - Copyright (C) 2006 Free Software Foundation, Inc. This is free software. You may redistribute copies of it under the terms of the GNU General Public License . There is NO WARRANTY, to the extent permitted by law. EOF }
