201 lines
6.4 KiB
Bash
201 lines
6.4 KiB
Bash
#!/bin/sh
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#
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# Run this script as root on the machine that has the tape drive, to make a
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# full (level-0) dump.
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#
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# If you give `now' as an argument, the dump is done immediately.
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# Otherwise, it waits until 1am, or until the hour given as argument.
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# Specify the hour as a number from 0 to 23.
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#
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# You must edit the file `backup-specs' to set the parameters for your site.
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# Useful for backup-specs, in case things have to be done slightly
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# differently for different dump levels.
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DUMP_LEVEL=0
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# Insure `mail' is in PATH.
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PATH="/usr/ucb:${PATH}"
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export PATH
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# This is not the most reliable test in the world. The following might be
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# more predictable:
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#
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# whoami="`whoami`"
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# euid="`sed -ne '/^'\"${whoami}\"':/{s/^[^:]*:[^:]*://;s/:.*//p;q;}' /etc/passwd`"
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# if [ "${euid}" != 0 ]; then ...
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#
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if [ ! -w / ]; then
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echo "The backup must be run as root or else some files will fail to be dumped."
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exit 1
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fi
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# Get the values of BACKUP_DIRS, BACKUP_FILES, and other variables.
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. ./backup-specs
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# Maybe sleep until around specified or default hour.
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if [ "${1}" != "now" ]; then
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if [ "${1}x" != "x" ]; then
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spec="${1}"
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else
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spec="${BACKUP_HOUR}"
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fi
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pausetime="`date | awk '
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{
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hr = substr($4, 1, 2);
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mn = substr($4, 4, 2);
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if((hr + 0) < (spec + 0))
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print 3600 * (spec - hr) - 60 * mn;
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else
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print 3600 * (spec + (24 - hr)) - 60 * mn;
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}' spec=\"${spec}\"`"
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clear
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echo "${SLEEP_MESSAGE}"
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sleep "${pausetime}"
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fi
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# start doing things
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# Put startdate in the subject line of mailed report, since if it happens
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# to run longer than 24 hours (as may be the case if someone forgets to put
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# in the next volume of the tape in adequate time), the backup date won't
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# appear too misleading.
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startdate="`date`"
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here="`pwd`"
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# Logfile name should be in the form ``log-1993-03-18-level-0''
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# They go in the subdirectory `log' of the current directory.
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# i.e. year-month-date. This format is useful for sorting by name, since
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# logfiles are intentionally kept online for future reference.
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LOGFILE="log/log-`date | sed -ne '
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s/[^ ]* *\([^ ]*\) *\([^ ]*\).* \([^ ]*\)$/\3-\1-\2/
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/-[0-9]$/s/\([0-9]\)$/0\1/
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/Jan/{s/Jan/01/p;q;}
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/Feb/{s/Feb/02/p;q;}
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/Mar/{s/Mar/03/p;q;}
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/Apr/{s/Apr/04/p;q;}
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/May/{s/May/05/p;q;}
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/Jun/{s/Jun/06/p;q;}
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/Jul/{s/Jul/07/p;q;}
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/Aug/{s/Aug/08/p;q;}
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/Sep/{s/Sep/09/p;q;}
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/Oct/{s/Oct/10/p;q;}
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/Nov/{s/Nov/11/p;q;}
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/Dec/{s/Dec/12/p;q;}'`-level-${DUMP_LEVEL}"
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localhost="`hostname | sed -e 's/\..*//'`"
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TAR_PART1="${TAR} -c --multi-volume --one-file-system --blocking=${BLOCKING} --sparse --volno-file=${VOLNO_FILE}"
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# Only use --info-script if DUMP_REMIND_SCRIPT was defined in backup-specs
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if [ "x${DUMP_REMIND_SCRIPT}" != "x" ]; then
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TAR_PART1="${TAR_PART1} --info-script='${DUMP_REMIND_SCRIPT}'"
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fi
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# Make sure the log file did not already exist. Create it.
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if [ -f "${LOGFILE}" ] ; then
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echo "Log file ${LOGFILE} already exists." 1>&2
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exit 1
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else
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touch "${LOGFILE}"
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fi
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# Most everything below here is run in a subshell for which all output is
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# piped through `tee' to the logfile. Doing this, instead of having
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# multiple pipelines all over the place, is cleaner and allows access to
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# the exit value from various commands more easily.
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(
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# Caveat: Some version of `mt' require `-t', not `-f'.
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mt -f "${TAPE_FILE}" rewind
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rm -f "${VOLNO_FILE}"
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set - ${BACKUP_DIRS}
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while [ $# -ne 0 ] ; do
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date="`date`"
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remotehost="`echo \"${1}\" | sed -e 's/:.*$//'`"
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fs="`echo \"${1}\" | sed -e 's/^.*://'`"
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fsname="`echo \"${1}\" | sed -e 's/\//:/g'`"
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# This filename must be absolute; it is opened on the machine that runs tar.
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TAR_PART2="--listed=/etc/tar-backup/temp.level-0"
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TAR_PART3="--label='Full backup of ${fs} on ${remotehost} at ${date}' -C ${fs} ."
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echo "Backing up ${1} at ${date}"
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# Actually back things up.
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if [ "z${localhost}" != "z${remotehost}" ] ; then
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rsh "${remotehost}" mkdir /etc/tar-backup > /dev/null 2>&1
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rsh "${remotehost}" rm -f /etc/tar-backup/temp.level-0
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rsh "${remotehost}" ${TAR_PART1} -f "${localhost}:${TAPE_FILE}" ${TAR_PART2} ${TAR_PART3}
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else
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mkdir /etc/tar-backup > /dev/null 2>&1
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rm -f /etc/tar-backup/temp.level-0
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# Using `sh -c exec' causes nested quoting and shell substitution
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# to be handled here in the same way rsh handles it.
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sh -c "exec ${TAR_PART1} -f \"${TAPE_FILE}\" ${TAR_PART2} ${TAR_PART3}"
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fi
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# `rsh' doesn't exit with the exit status of the remote command. What
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# stupid lossage. TODO: think of a reliable workaround.
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if [ $? -ne 0 ] ; then
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echo "Backup of ${1} failed." 1>&2
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# I'm assuming that the tar will have written an empty
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# file to the tape, otherwise I should do a cat here.
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else
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if [ "z${localhost}" != "z${remotehost}" ] ; then
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rsh "${remotehost}" mv -f /etc/tar-backup/temp.level-0 "/etc/tar-backup/${fsname}.level-0"
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else
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mv -f /etc/tar-backup/temp.level-0 "/etc/tar-backup/${fsname}.level-0"
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fi
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fi
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${TAPE_STATUS}
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sleep 60
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shift
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done
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# Dump any individual files requested.
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if [ "x${BACKUP_FILES}" != "x" ] ; then
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date="`date`"
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TAR_PART2="--listed=/etc/tar-backup/temp.level-0"
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TAR_PART3="--label='Full backup of miscellaneous files at ${date}'"
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mkdir /etc/tar-backup > /dev/null 2>&1
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rm -f /etc/tar-backup/temp.level-0
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echo "Backing up miscellaneous files at ${date}"
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# Using `sh -c exec' causes nested quoting and shell substitution
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# to be handled here in the same way rsh handles it.
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sh -c "exec ${TAR_PART1} -f \"${TAPE_FILE}\" ${TAR_PART2} ${TAR_PART3} ${BACKUP_FILES}"
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# `rsh' doesn't exit with the exit status of the remote command. What
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# lossage. TODO: think of a reliable workaround.
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if [ $? -ne 0 ] ; then
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echo "Backup of miscellaneous files failed."
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# I'm assuming that the tar will have written an empty
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# file to the tape, otherwise I should do a cat here.
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else
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mv -f /etc/tar-backup/temp.level-0 /etc/tar-backup/misc.level-0
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fi
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${TAPE_STATUS}
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else
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echo "No miscellaneous files specified"
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fi
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# Caveat: some versions of `mt' use `-t' instead of `-f'.
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mt -f "${TAPE_FILE}" rewind
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mt -f "${TAPE_FILE}" offl
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) 2>&1 | tee -a "${LOGFILE}"
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echo "Sending the dump log to ${ADMINISTRATOR}"
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mail -s "Results of backup started ${startdate}" ${ADMINISTRATOR} < "${LOGFILE}"
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# eof
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