home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Chip 2007 January, February, March & April
/
Chip-Cover-CD-2007-02.iso
/
Pakiet bezpieczenstwa
/
mini Pentoo LiveCD 2006.1
/
mpentoo-2006.1.iso
/
livecd.squashfs
/
usr
/
sbin
/
backup.sh
< prev
next >
Wrap
Linux/UNIX/POSIX Shell Script
|
2005-10-18
|
8KB
|
329 lines
#! /bin/sh
# This program is part of GNU tar
# Copyright 2004, Free Software Foundation
#
# 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., 59 Temple Place - Suite 330, Boston, MA
# 02111-1307, 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 "$1" status
}
# The main configuration file may override any of these variables
MT_BEGIN=mt_begin
MT_REWIND=mt_rewind
MT_OFFLINE=mt_offl
MT_STATUS=mt_status
# Insure `mail' is in PATH.
PATH="/usr/ucb:${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() {
date +%Y-%m-%d
}
# Bail out if we don't have root privileges.
test_root() {
if [ ! -w ${ROOT_FS-/} ]; then
bailout "The backup must be run as root or else some files will fail to be dumped."
fi
case "${ROOT_FS}" in
*/) ;;
*) ROOT_FS="${ROOT_FS}/"
esac
}
advice() {
echo "Directory $1 is not found." >&2
cat >&2 <<EOF
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 [ "$RSH" = "" ]; then
RSH=rsh
fi
POSIXLY_CORRECT=1
export POSIXLY_CORRECT
}
init_backup() {
init_common
TAR_PART1="${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='${DUMP_REMIND_SCRIPT}'"
fi
# Set logfile name
# Logfile name should be in the form ``log-1993-03-18-level-0''
# They go in the directory `/etc/log'.
# i.e. year-month-date. This format is useful for sorting by name, since
# logfiles are intentionally kept online for future reference.
LOGFILE="${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 -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 - <<EOF
This program is part of GNU tar
Copyright 2004, Free Software Foundation
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., 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA.
EOF
}