#!/bin/sh
#
# Run this script as root on the machine that has the tape drive, to make a
-# full dump.
+# full (level-0) dump.
#
# If you give `now' as an argument, the dump is done immediately.
# Otherwise, it waits until 1am, or until the hour given as argument.
#
# You must edit the file `backup-specs' to set the parameters for your site.
+# Useful for backup-specs, in case things have to be done slightly
+# differently for different dump levels.
+DUMP_LEVEL=0
+
+# Insure `mail' is in PATH.
+PATH="/usr/ucb:${PATH}"
+export PATH
+
+# This is not the most reliable test in the world. The following might be
+# more predictable:
+#
+# whoami="`whoami`"
+# euid="`sed -ne '/^'\"${whoami}\"':/{s/^[^:]*:[^:]*://;s/:.*//p;q;}' /etc/passwd`"
+# if [ "${euid}" != 0 ]; then ...
+#
if [ ! -w / ]; then
- echo The backup must be run as root or else some files will fail to be dumped.
+ echo "The backup must be run as root or else some files will fail to be dumped."
exit 1
-else
- false
fi
-# Get the values of BACKUP_DIRS and BACKUP_FILES, and other variables.
+# Get the values of BACKUP_DIRS, BACKUP_FILES, and other variables.
. ./backup-specs
# Maybe sleep until around specified or default hour.
-#
if [ "${1}" != "now" ]; then
if [ "${1}x" != "x" ]; then
spec="${1}"
else
spec="${BACKUP_HOUR}"
fi
- pausetime=`date | awk '{hr=substr($4,1,2);\\
- mn=substr($4,4,2);\\
- if((hr+0)<(spec+0))\\
- print 3600*(spec-hr)-60*mn;\\
- else\\
- print 3600*(spec+(24-hr))-60*mn; }' spec=$spec`
+
+ pausetime="`date | awk '
+ {
+ hr = substr($4, 1, 2);
+ mn = substr($4, 4, 2);
+ if((hr + 0) < (spec + 0))
+ print 3600 * (spec - hr) - 60 * mn;
+ else
+ print 3600 * (spec + (24 - hr)) - 60 * mn;
+ }' spec=\"${spec}\"`"
+
clear
- cat ./dont_touch
- sleep ${pausetime}
+ echo "${SLEEP_MESSAGE}"
+ sleep "${pausetime}"
fi
# start doing things
-here=`pwd`
-LOGFILE=log-`date | awk '{print $2 "-" $3 "-" $6}'`-full
-HOST=`hostname | sed 's/\..*//'`
+# 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`"
+
+# Logfile name should be in the form ``log-1993-03-18-level-0''
+# i.e. year-month-date. This format is useful for sorting by name, since
+# logfiles are intentionally kept online for future reference.
+LOGFILE=log-`date | awk '
+ BEGIN {
+ d["Jan"] = "01"; d["Feb"] = "02"; d["Mar"] = "03";
+ d["Apr"] = "04"; d["May"] = "05"; d["Jun"] = "06";
+ d["Jul"] = "07"; d["Aug"] = "08"; d["Sep"] = "09";
+ d["Oct"] = "10"; d["Nov"] = "11"; d["Dec"] = "12";
+ }
+ {
+ if ($3 < 10)
+ $3 = "0" $3;
+ print $6 "-" d[$2] "-" $3;
+ }'`-level-${DUMP_LEVEL}
+
+localhost="`hostname | sed -e 's/\..*//'`"
+
TAR_PART1="/usr/local/bin/tar -c --multi-volume --one-file-system --block=${BLOCKING} --sparse --volno-file=${VOLNO_FILE}"
# Only use --info-script if DUMP_REMIND_SCRIPT was defined in backup-specs
-if [ x != "x${DUMP_REMIND_SCRIPT}" ]; then
- TAR_PART1="${TAR_PART1} --info-script=${DUMP_REMIND_SCRIPT}"
+if [ "x${DUMP_REMIND_SCRIPT}" != "x" ]; then
+ TAR_PART1="${TAR_PART1} --info-script='${DUMP_REMIND_SCRIPT}'"
fi
# Make sure the log file did not already exist. Create it.
-if [ -f ${LOGFILE} ] ; then
- echo Log file ${LOGFILE} already exists.
+if [ -f "${LOGFILE}" ] ; then
+ echo "Log file ${LOGFILE} already exists." 1>&2
exit 1
else
- touch ${LOGFILE}
+ touch "${LOGFILE}"
fi
-mt -f ${TAPE_FILE} rewind
-rm ${VOLNO_FILE}
-
-set ${BACKUP_DIRS}
-while [ $# -ne 0 ] ; do
- host=`echo ${1} | sed 's/:.*$//'`
- fs=`echo ${1} | sed 's/^.*://'`
- date=`date`
- fsname=`echo $1 | sed 's/\//:/g'`
-
- TAR_PART2="--listed=/etc/tar-backup/temp.level-0"
- TAR_PART3="--label='Full backup of ${fs} on ${host} at ${date}' -C ${fs} ."
-
- echo Backing up ${1} at ${date} | tee -a ${LOGFILE}
-
- # Actually back things up.
-
- if [ ${HOST} != ${host} ] ; then
- # Removed 2>&1/dev/null cruft since that's incorrect sh syntax.
- rsh ${host} mkdir /etc/tar-backup > /dev/null 2>&1
- rsh ${host} rm -f /etc/tar-backup/temp.level-0
- rsh ${host} ${TAR_PART1} -f ${HOST}:${TAPE_FILE} ${TAR_PART2} ${TAR_PART3} 2>&1 | tee -a ${LOGFILE}
- else
- mkdir /etc/tar-backup > /dev/null 2>&1
- rm -f /etc/tar-backup/temp.level-0
-# Using `sh -c exec' causes nested quoting and shell substitution
-# to be handled here in the same way rsh handles it.
- sh -c "exec ${TAR_PART1} -f ${TAPE_FILE} ${TAR_PART2} ${TAR_PART3}" 2>&1 | tee -a ${LOGFILE}
- fi
- # This doesn't presently work, of course, because $? is set to the exit
- # status of the last thing in the pipeline of the previous command,
- # namely `tee'. We really want the exit status of the sh command
- # running tar, but getting this seems to be nontrivial. --friedman
- if [ $? -ne 0 ] ; then
- echo Backup of ${1} failed. | tee -a ${LOGFILE}
+# Most everything below here is run in a subshell for which all output is
+# piped through `tee' to the logfile. Doing this, instead of having
+# multiple pipelines all over the place, is cleaner and allows access to
+# the exit value from various commands more easily.
+(
+ # Caveat: Some version of `mt' require `-t', not `-f'.
+ mt -f "${TAPE_FILE}" rewind
+ rm -f "${VOLNO_FILE}"
+
+ set - "${BACKUP_DIRS}"
+ while [ $# -ne 0 ] ; do
+ date="`date`"
+ remotehost="`echo \"${1}\" | sed -e 's/:.*$//'`"
+ fs="`echo \"${1}\" | sed -e 's/^.*://'`"
+ fsname="`echo \"${1}\" | sed -e 's/\//:/g'`"
+
+ # This filename must be absolute; it is opened on the machine that runs tar.
+ TAR_PART2="--listed=/etc/tar-backup/temp.level-0"
+ TAR_PART3="--label='Full backup of ${fs} on ${remotehost} at ${date}' -C ${fs} ."
+
+ echo "Backing up ${1} at ${date}"
+
+ # Actually back things up.
+
+ if [ "z${localhost}" != "z${remotehost}" ] ; then
+ rsh "${remotehost}" mkdir /etc/tar-backup > /dev/null 2>&1
+ rsh "${remotehost}" rm -f /etc/tar-backup/temp.level-0
+ rsh "${remotehost}" ${TAR_PART1} -f "${localhost}:${TAPE_FILE}" ${TAR_PART2} ${TAR_PART3}
+ else
+ mkdir /etc/tar-backup > /dev/null 2>&1
+ rm -f /etc/tar-backup/temp.level-0
+ # Using `sh -c exec' causes nested quoting and shell substitution
+ # to be handled here in the same way rsh handles it.
+ sh -c "exec ${TAR_PART1} -f \"${TAPE_FILE}\" ${TAR_PART2} ${TAR_PART3}"
+ fi
+
+ # `rsh' doesn't exit with the exit status of the remote command. What
+ # stupid lossage. TODO: think of a reliable workaround.
+ if [ $? -ne 0 ] ; then
+ echo "Backup of ${1} failed." 1>&2
+ # I'm assuming that the tar will have written an empty
+ # file to the tape, otherwise I should do a cat here.
+ else
+ if [ "z${localhost}" != "z${remotehost}" ] ; then
+ rsh "${remotehost}" mv -f /etc/tar-backup/temp.level-0 "/etc/tar-backup/${fsname}.level-0"
+ else
+ mv -f /etc/tar-backup/temp.level-0 "/etc/tar-backup/${fsname}.level-0"
+ fi
+ fi
+ ${TAPE_STATUS}
+ sleep 60
+ shift
+ done
+
+ # Dump any individual files requested.
+
+ if [ "x${BACKUP_FILES}" != "x" ] ; then
+ date="`date`"
+
+ TAR_PART2="--listed=/etc/tar-backup/temp.level-0"
+ TAR_PART3="--label='Full backup of miscellaneous files at ${date}'"
+
+ mkdir /etc/tar-backup > /dev/null 2>&1
+ rm -f /etc/tar-backup/temp.level-0
+
+ echo "Backing up miscellaneous files at ${date}"
+
+ # Using `sh -c exec' causes nested quoting and shell substitution
+ # to be handled here in the same way rsh handles it.
+ sh -c "exec ${TAR_PART1} -f \"${TAPE_FILE}\" ${TAR_PART2} ${TAR_PART3} ${BACKUP_FILES}"
+
+ # `rsh' doesn't exit with the exit status of the remote command. What
+ # lossage. TODO: think of a reliable workaround.
+ if [ $? -ne 0 ] ; then
+ echo "Backup of miscellaneous files failed."
# I'm assuming that the tar will have written an empty
# file to the tape, otherwise I should do a cat here.
- else
- if [ ${HOST} != ${host} ] ; then
- rsh ${host} "mv -f /etc/tar-backup/temp.level-0 /etc/tar-backup/${fsname}.level-0" 2>&1 | tee -a ${LOGFILE}
- else
- mv -f /etc/tar-backup/temp.level-0 /etc/tar-backup/${fsname}.level-0 2>&1 | tee -a ${LOGFILE}
- fi
- fi
- ${TAPE_STATUS} | tee -a ${LOGFILE}
- sleep 60
- shift
-done
-
-# Dump any individual files requested.
-
-if [ x != "x${BACKUP_FILES}" ] ; then
- date=`date`
-
- TAR_PART2="--listed=/etc/tar-backup/temp.level-0"
- TAR_PART3="--label='Full backup of miscellaneous files at ${date}'"
-
- mkdir /etc/tar-backup > /dev/null 2>&1
- rm -f /etc/tar-backup/temp.level-0
-
- echo Backing up miscellaneous files at ${date} | tee -a ${LOGFILE}
-# Using `sh -c exec' causes nested quoting and shell substitution
-# to be handled here in the same way rsh handles it.
- sh -c "exec ${TAR_PART1} -f ${TAPE_FILE} ${TAR_PART2} ${TAR_PART3} \
- ${BACKUP_FILES}" 2>&1 | tee -a ${LOGFILE}
- # This doesn't presently work, of course, because $? is set to the exit
- # status of the last thing in the pipeline of the previous command,
- # namely `tee'. We really want the exit status of the sh command
- # running tar, but getting this seems to be nontrivial. --friedman
- if [ $? -ne 0 ] ; then
- echo Backup of miscellaneous files failed. | tee -a ${LOGFILE}
- # I'm assuming that the tar will have written an empty
- # file to the tape, otherwise I should do a cat here.
- else
- mv -f /etc/tar-backup/temp.level-0 /etc/tar-backup/misc.level-0 2>&1 | tee -a ${LOGFILE}
- fi
- ${TAPE_STATUS} | tee -a ${LOGFILE}
-else
- echo No miscellaneous files specified | tee -a ${LOGFILE}
- false
-fi
+ else
+ mv -f /etc/tar-backup/temp.level-0 /etc/tar-backup/misc.level-0
+ fi
+ ${TAPE_STATUS}
+ else
+ echo "No miscellaneous files specified"
+ fi
+
+ # Caveat: some versions of `mt' use `-t' instead of `-f'.
+ mt -f "${TAPE_FILE}" rewind
+ mt -f "${TAPE_FILE}" offl
-mt -f ${TAPE_FILE} rewind
-mt -f ${TAPE_FILE} offl
+) 2>&1 | tee -a "${LOGFILE}"
-echo Sending the dump log to ${ADMINISTRATOR}
-cat ${LOGFILE} | sed -f logfile.sed > ${LOGFILE}.tmp
-/usr/ucb/mail -s "Results of backup on `date`" ${ADMINISTRATOR} < ${LOGFILE}.tmp
-rm -f ${LOGFILE}.tmp
+echo "Sending the dump log to ${ADMINISTRATOR}"
+mail -s "Results of backup started ${startdate}" ${ADMINISTRATOR} < "${LOGFILE}"
+# eof
projects / chaz / tar / commitdiff
