X-Git-Url: http://git.treefish.org/~alex/backmeupscotty.git/blobdiff_plain/5bfca64faf83a059b06cd63c259789989f59bc94..HEAD:/backmeupscotty diff --git a/backmeupscotty b/backmeupscotty index e0689a0..729a781 100644 --- a/backmeupscotty +++ b/backmeupscotty @@ -1,32 +1,50 @@ #!/bin/bash +REMOTE_USER=root REMOTE_HOST=localhost REMOTE_DIR=/tmp/backmeupscotty/test ARCHIVE_KEEPNBACKUPS=30 ARCHIVE_KEEPNDAYS=30 BACKUP_RUNEVERYNTHDAY=1 +BWLIMIT=500KiB +BACKUP_FORCE=0 +FAKE_SUPER=0 -function upperme { - echo $(basename $0) | tr '[:lower:]' '[:upper:]' +_ERROR_ENCOUNTERED=0 + +function timestamp { + date +'[%y-%m-%d|%H:%M:%S]' +} + +function scottyline { + echo $(timestamp) $@ } function scottyinfo { - echo $(upperme): $@ + if [ $_ERROR_ENCOUNTERED -eq 0 ]; then + scottyline $@ + else + scottyline $@ >&2 + fi } function scottyerror { - echo $(upperme): $@ >&2 + scottyline $@ >&2 + if [ $_ERROR_ENCOUNTERED -eq 0 ]; then + _ERROR_ENCOUNTERED=1 + scottyline "Going into verbose mode after error encounter." >&2 + fi } function ssh255 { - ssh $@ + ssh -l $REMOTE_USER $@ sshret=$? if [ $sshret -eq 255 ]; then - scottyerror "SSH connection failed!" - exit 1 + scottyerror "SSH connection failed!" + exit 1 else - return $sshret + return $sshret fi } @@ -36,30 +54,29 @@ function grepbackups { function isIncomplete { if ( ssh255 $REMOTE_HOST '[ -d '$REMOTE_DIR/incomplete' ]' ); then - return 0 + return 0 else - return 1 + return 1 fi } function isNthDay { - if [ $(( ( $(date +%s) / (60*60*24) ) % $BACKUP_RUNEVERYNTHDAY )) -eq 0 ]; + if [ $(( ( $(date +%s) / (60*60*24) ) % $BACKUP_RUNEVERYNTHDAY )) -eq 0 ]; then - return 0 + return 0 else - return 1 - fi + return 1 + fi } function latestTooOld { for oldbackup in $(grepbackups); do - tstamp=$(echo $oldbackup | cut -d'-' -f1) - - if [ $(( $(date +%s) - $tstamp )) -lt \ - $(( ($BACKUP_RUNEVERYNTHDAY*24+12)*60*60 )) ] - then - return 1 - fi + tstamp=$(echo $oldbackup | cut -d'-' -f1) + + if [ $(( $(date +%s) - $tstamp )) -lt $(( ($BACKUP_RUNEVERYNTHDAY*24+12)*60*60 )) ] + then + return 1 + fi done return 0 @@ -71,13 +88,13 @@ function scottysync { scottyinfo "Syncing $SYNC_SRC to $REMOTE_HOST:$REMOTE_DIR @$timestamp." if [ ! -d "$SYNC_SRC" ]; then - scottyerror "Source dir $SYNC_SRC does not exist. Not syncing!" - return 1 + scottyerror "Source dir $SYNC_SRC does not exist. Not syncing!" + return 1 fi if [ $(ls -A "$SYNC_SRC" | wc -l) -eq 0 ]; then - scottyerror "Source dir $SYNC_SRC is empty. Not syncing!" - return 1 + scottyerror "Source dir $SYNC_SRC is empty. Not syncing!" + return 1 fi dir_current=$REMOTE_DIR/current @@ -85,56 +102,73 @@ function scottysync { dir_timestamped=$REMOTE_DIR/$timestamp-$(date -d @$timestamp +%Y%m%d%H%M%S) if [ -z $SYNC_EXC ]; then - rsync_exclude="" + rsync_exclude="" else - rsync_exclude=$(eval echo --exclude={$SYNC_EXC} | tr -d {}) + rsync_exclude=$(eval echo --exclude={$SYNC_EXC} | tr -d {}) + fi + + if [ $FAKE_SUPER -eq 1 ]; then + rsync_fake_super="-M--fake-super" + else + rsync_fake_super="" fi if (ssh255 $REMOTE_HOST '[ ! -d '$REMOTE_DIR' ]'); then - scottyinfo "Creating destination directory $REMOTE_HOST:$REMOTE_DIR." - ssh255 $REMOTE_HOST "mkdir $REMOTE_DIR" + scottyinfo "Creating destination directory $REMOTE_HOST:$REMOTE_DIR." + ssh255 $REMOTE_HOST "mkdir $REMOTE_DIR" fi if isIncomplete; then - scottyerror "Continuing old incomplete backup." + scottyerror "Continuing old incomplete backup." fi scottyinfo "Starting rsync." - rsync -e ssh \ - -v -aHAX --numeric-ids --delete --delete-excluded \ - --link-dest=$dir_current \ - $rsync_exclude \ - $SYNC_SRC/ $REMOTE_HOST:$dir_incomplete/ - + rsync -e "ssh -l $REMOTE_USER" --bwlimit=$BWLIMIT \ + -v -aHAX --numeric-ids --delete --delete-excluded \ + --link-dest=$dir_current \ + $rsync_exclude $rsync_fake_super \ + $SYNC_SRC/ $REMOTE_HOST:$dir_incomplete/ + if [ $? -eq 0 ]; then - scottyinfo "Timestamping completed backup and linking to current backup." - ssh255 $REMOTE_HOST \ - "mv $dir_incomplete $dir_timestamped && rm -f $dir_current && ln -s $(basename $dir_timestamped) $dir_current" + scottyinfo "Timestamping completed backup and linking to current backup." + ssh255 $REMOTE_HOST \ + "mv $dir_incomplete $dir_timestamped && rm -f $dir_current && \ + ln -s $(basename $dir_timestamped) $dir_current" + else + scottyerror "Rsync failed." fi while [ $(grepbackups | wc -l) -gt $ARCHIVE_KEEPNBACKUPS ]; do - oldestbackup=$(grepbackups | head -1) - oldestbackuptstamp=$(echo $oldestbackup | cut -d'-' -f1) - - if [ $oldestbackuptstamp -lt $(( $(date +%s) - $ARCHIVE_KEEPNDAYS*60*60*24 )) ]; then - scottyinfo "Removing old backup $oldestbackup." - ssh255 $REMOTE_HOST rm -r "$REMOTE_DIR/$oldestbackup" - else - break - fi + oldestbackup=$(grepbackups | head -1) + oldestbackuptstamp=$(echo $oldestbackup | cut -d'-' -f1) + + if [ $oldestbackuptstamp -lt $(( $(date +%s) - $ARCHIVE_KEEPNDAYS*60*60*24 )) ]; then + scottyinfo "Removing old backup $oldestbackup." + ssh255 $REMOTE_HOST rm -r "$REMOTE_DIR/$oldestbackup" + else + break + fi done } +function deleteLock { + if ! rmdir /var/lock/$(basename $0); then + scottyerror "Could not delete lockfile /tmp/$(basename $0).lock!" + fi +} + function cleanup_abort { scottyerror "Caught exit signal! Cleaning up." cleanup ABORT if [ $(jobs -p) ]; then - scottyerror "TERMinating remaining child processes." - kill $(jobs -p) + scottyerror "TERMinating remaining child processes." + kill $(jobs -p) fi + deleteLock + exit } @@ -146,6 +180,11 @@ function prepare { scottyinfo "No prepare function was defined." } +function cleanup_normal { + cleanup + deleteLock +} + function printhelp { cat < /dev/null - ;; - n) - BACKUP_RUNEVERYNTHDAY=$OPTARG - ;; - h) - printhelp + while getopts "qn:flh" opt; do + case $opt in + q) + exec > /dev/null + ;; + n) + BACKUP_RUNEVERYNTHDAY=$OPTARG + ;; + f) + BACKUP_FORCE=1 + ;; + l) + LIST_BACKUPS=1 + ;; + h) + printhelp exit 0 ;; - esac + esac done - + ssh255 $REMOTE_HOST exit - if latestTooOld; then - scottyerror "The latest backup is too old." + if [ $LIST_BACKUPS ]; then + for backup in $(grepbackups); do + echo $backup + done + exit 0 + fi + + exclusiveLock + + if [ $BACKUP_FORCE -eq 1 ]; then + scottyinfo "Backup was enforced." + elif latestTooOld; then + scottyerror "The latest backup is too old." elif isNthDay; then - scottyinfo "This is the nth day." + scottyinfo "This is the nth day." else - scottyinfo "No backup has to be done. Exiting." - exit 0 + scottyinfo "No backup has to be done. Exiting." + exit 0 fi scottyinfo "Performing backup." @@ -191,14 +258,7 @@ function backmeupscotty { prepare scottysync - trap cleanup EXIT + trap cleanup_normal EXIT exit 0 } - -exec 200>/var/run/$(basename $0).pid -if ! flock -n 200; then - scottyerror "Another instance of $(basename $0) is still running!" - exit 1 -fi -echo $$ 1>&200