-#!/bin/sh
-#
-# Run this script as root on the machine that has the tape drive, to make a
-# level-1 dump containing all files changed since the last full dump.
-#
-# If you give `now' as an argument, the dump is done immediately.
-# Otherwise, it waits until 1am.
-#
-# 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=1
-
-# 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 [ "${euid}" != 0 ]; then ...
-#
-if [ ! -w / ]; then
- echo "The backup must be run as root or else some files will fail to be dumped."
- exit 1
-fi
-
-# Get the values of BACKUP_DIRS, BACKUP_FILES, and other variables.
-. ./backup-specs
-
-# Maybe sleep until around specified or default hour.
-if [ "z${1}" != "znow" ]; 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}\"`"
-
- clear
- echo "${SLEEP_MESSAGE}"
- sleep "${pausetime}"
-fi
-
-# start doing things
-
-# 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-1''
-# They go in the subdirectory `log' of the current directory.
-# i.e. year-month-date. This format is useful for sorting by name, since
-# logfiles are intentionally kept online for future reference.
-LOGFILE="log/log-`date | sed -ne '
- s/[^ ]* *\([^ ]*\) *\([^ ]*\).* \([^ ]*\)$/\3-\1-\2/
- /-[0-9]$/s/\([0-9]\)$/0\1/
- /Jan/{s/Jan/01/p;q;}
- /Feb/{s/Feb/02/p;q;}
- /Mar/{s/Mar/03/p;q;}
- /Apr/{s/Apr/04/p;q;}
- /May/{s/May/05/p;q;}
- /Jun/{s/Jun/06/p;q;}
- /Jul/{s/Jul/07/p;q;}
- /Aug/{s/Aug/08/p;q;}
- /Sep/{s/Sep/09/p;q;}
- /Oct/{s/Oct/10/p;q;}
- /Nov/{s/Nov/11/p;q;}
- /Dec/{s/Dec/12/p;q;}'`-level-${DUMP_LEVEL}"
-
-localhost="`hostname | sed -e 's/\..*//'`"
-
-TAR_PART1="${TAR} -c --multi-volume --one-file-system --blocking=${BLOCKING} --sparse --volno-file=${VOLNO_FILE}"
-
-# Only use --info-script if DUMP_REMIND_SCRIPT was defined in backup-specs
-if [ "x${DUMP_REMIND_SCRIPT}" != "x" ]; then
- TAR_PART1="${TAR_PART1} --info-script='${DUMP_REMIND_SCRIPT}'"
-fi
-
-# Make sure the log file did not already exist. Create it.
-
-if [ -f "${LOGFILE}" ] ; then
- echo "Log file ${LOGFILE} already exists." 1>&2
- exit 1
-else
- touch "${LOGFILE}"
-fi
-
-# 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-1"
- TAR_PART3="--label='level 1 backup of ${fs} on ${remotehost} at ${date}' -C ${fs} ."
-
- echo "Backing up ${1} at ${date}"
- echo "Last full dump on this filesystem:"
-
- if [ "z${remotehost}" != "z${localhost}" ] ; then
- rsh "${remotehost}" "ls -l /etc/tar-backup/${fsname}.level-0; \
- cp /etc/tar-backup/${fsname}.level-0 /etc/tar-backup/temp.level-1"
- else
- ls -l "/etc/tar-backup/${fsname}.level-0"
- cp "/etc/tar-backup/${fsname}.level-0" /etc/tar-backup/temp.level-1
- fi
-
- # Actually back things up.
-
- if [ "z${remotehost}" != "z${localhost}" ] ; then
- rsh "${remotehost}" ${TAR_PART1} -f "${localhost}:${TAPE_FILE}" ${TAR_PART2} ${TAR_PART3}
- else
- # 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 ${1} failed."
- # I'm assuming that the tar will have written an empty
- # file to the tape, otherwise I should do a cat here.
- else
- if [ "z${localhost}" != "z${remotehost}" ] ; then
- rsh "${remotehost}" mv -f /etc/tar-backup/temp.level-1 "/etc/tar-backup/${fsname}.level-1"
- else
- mv -f /etc/tar-backup/temp.level-1 "/etc/tar-backup/${fsname}.level-1"
- 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-1"
- TAR_PART3="--label='Incremental backup of miscellaneous files at ${date}'"
-
- echo "Backing up miscellaneous files at ${date}"
- echo "Last full dump of these files:"
- ls -l /etc/tar-backup/misc.level-0
-
- rm -f /etc/tar-backup/temp.level-1
- cp /etc/tar-backup/misc.level-0 /etc/tar-backup/temp.level-1
-
- # 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}"
-
- if [ $? -ne 0 ] ; then
- echo "Backup of miscellaneous files 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
- mv -f /etc/tar-backup/temp.level-1 /etc/tar-backup/misc.level-1
- 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 "${TAPE_FILE}" offl
-
-) 2>&1 | tee -a "${LOGFILE}"
-
-echo "Sending the dump log to ${ADMINISTRATOR}"
-mail -s "Results of backup started ${startdate}" ${ADMINISTRATOR} < "${LOGFILE}"
-
-# eof