X-Git-Url: https://git.dogcows.com/gitweb?a=blobdiff_plain;f=scripts%2Flevel-0;h=bcf886df3ed9d9d44b1b58f2689ba584efdd4781;hb=63f2f45b88e84d2a8d414da0ae81ffe58fda7cb4;hp=25571d4b15bf9850ff3c5b1b6de8375735188b02;hpb=9c8ae7901bad3a7ced70482ea4d81f5e56a84ac4;p=chaz%2Ftar

diff --git a/scripts/level-0 b/scripts/level-0
index 25571d4..bcf886d 100644
--- a/scripts/level-0
+++ b/scripts/level-0
@@ -1,7 +1,7 @@
 #!/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.
@@ -9,143 +9,192 @@
 #
 # 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 "-" $6}'`-full
-HOST=`hostname | sed 's/\..*//'`
-TAR_PART1="/usr/local/bin/tar -c --multi-volume --one-file-system --block=${BLOCKING} --sparse --volno-file=${VOLNO_FILE}"
+# 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''
+# 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="${TAR} -c --multi-volume --one-file-system --block-size=${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