initial g_backup function

gaboshlib/g_backup.bashfunc

@@ -0,0 +1,111 @@
+#!/bin/bash
+
+function g_backup {
+
+  #### Config defaults
+  # dir(s) to backup (: separated)
+  BACKUPDIRS=/""
+  # Excludefile für rsync
+  BACKUPEXCLUDES=""
+  # Backup-Server (Backup-Destination)
+  BACKUPSRV=""
+  # SSH Port
+  BACKUPSRVPORT="22"
+  # SSH User
+  BACKUPSRVUSER="root"
+  # Destination path on Backup-Server
+  BACKUPSRVPATH=""
+  # run optional command on server and start backup only on success
+  BACKUPSRVTESTCMD=""
+  # Copy only without hostname/backup-date Structure
+  NODIRSTRUCT=""
+
+  g_tries=3
+  g_tries_delay=1
+
+  # Config files for custom vars
+  [ -r /usr/local/etc/g_backup.conf ] && . /usr/local/etc/g_backup.conf
+  [ -r ~/.config/g_backup.conf ] && . ~/.config/g_backup.conf
+
+  # Use CMD-line args
+  [ -n "$1" ] && BACKUPDIRS=$1
+  [ -n "$2" ] && BACKUPSRVPATH=$2
+  [ -n "$3" ] && BACKUPEXCLUDES=$3
+  [ -n "$4" ] && BACKUPSRV=$4
+  [ -n "$5" ] && BACKUPSRVPORT=$5
+  [ -n "$6" ] && BACKUPSRVUSER=$6
+  [ -n "$7" ] && BACKUPSRVTESTCMD=$7
+  [ -n "$8" ] && NODIRSTRUCT=$8
+
+  usage="
+  $0 BACKUPDIR1[:BACKUPDIR2:BACKUPDIR3] BACKUPPATH [BACKUPEXCLUDES BACKUPSRV BACKUPSRVPORT BACKUPSRVUSER BACKUPSRVTESTCMD NODIRSTRUCT]"
+
+  [ -z "$BACKUPDIRS" ] && g_echo_error_exit "No Directory to Backup (BACKUPDIR) given $usage"
+  [ -z "$BACKUPSRVPATH" ] && g_echo_error_exit "No path to put the Backup (BACKUPPATH) given $usage"
+
+  if [ -n "$BACKUPSRV" ] 
+  then
+    [ -z "$BACKUPSRVPORT" ] && g_echo_error_exit "No SSH-Port given $usage"
+    sshopts="g_retrycmd ssh -p $BACKUPSRVPORT -o BatchMode=yes -o StrictHostKeyChecking=accept-new  $BACKUPSRVUSER@$BACKUPSRV"
+  fi
+
+  rsyncopts="-aXAh --delete"
+  [ -n "$BACKUPEXCLUDES" ] && rsyncopts="$rsyncopts --delete-excluded --exclude-from=$BACKUPEXCLUDES"
+  [ -n "$BACKUPSRV" ] && rsyncopts="$rsyncopts -e \\'ssh -p $BACKUPSRVPORT\\'"
+
+  ORIGIFS="$IFS"
+  IFS=':'
+  # Prepare Dest-Dir on Backup-Server
+  CMDS="mkdir -p ${BACKUPSRVPATH}:chmod 700 ${BACKUPSRVPATH}"
+  [ -n "$BACKUPSRVTESTCMD" ] && CMDS="$BACKUPSRVTESTCMD:$CMDS"
+  for CMD in $CMDS
+  do
+    IFS="$ORIGIFS"
+    g_runcmd $sshopts $CMD || exit $?
+  done
+
+  IFS=':'
+  for BACKUPDIR in $BACKUPDIRS
+  do
+    IFS="$ORIGIFS"
+    rsyncoptsrun=$rsyncopts
+
+    # prepare paths
+    if [ -z "$NODIRSTRUCT" ]
+    then
+      # build structure
+      BACKUPSRVPATH_WITH_HOST="$BACKUPSRVPATH/$(hostname)"
+      BACKUPSRVPATH_WITH_DATE="$BACKUPSRVPATH_WITH_HOST/backup-$(date +%Y-%m-%d)/$BACKUPDIR"
+      BACKUPSRVPATH_WITH_DATE_INCOMPLETE="$BACKUPSRVPATH_WITH_DATE-incomplete"
+      g_runcmd $sshopts "mkdir -p $BACKUPSRVPATH_WITH_DATE_INCOMPLETE" || exit $?
+      BACKUPSRVPATH_LINK_DEST="$($sshopts ls -d $BACKUPSRVPATH_WITH_HOST/backup-*/$BACKUPDIR 2>/dev/null | grep -v \\' Try \\' | tail -n1)"
+      # linkdest
+      [ -n "$BACKUPSRVPATH_LINK_DEST" ] && rsyncoptsrun="$rsyncoptsrun --link-dest=$BACKUPSRVPATH_LINK_DEST"
+    else
+      BACKUPSRVPATH_WITH_DATE_INCOMPLETE="/$BACKUPSRVPATH"
+    fi
+    
+    # Backup
+    [ -n "$BACKUPSRV" ] && sshrsync="$BACKUPSRVUSER@$BACKUPSRV:"
+    echo "g_retrycmd rsync $rsyncoptsrun $BACKUPDIR/ ${sshrsync}$BACKUPSRVPATH_WITH_DATE_INCOMPLETE/" >$g_tmp/bcmd
+    g_echo "Running Backup $BACKUPDIR with 
+$(cat $g_tmp/bcmd)"
+    g_runcmd bash $g_tmp/bcmd || exit $?
+
+    # done if no direstructure
+    [ -n "$NODIRSTRUCT" ] && continue
+
+    g_runcmd $sshopts test -e $BACKUPSRVPATH_WITH_DATE && $sshopts mv $BACKUPSRVPATH_WITH_DATE $BACKUPSRVPATH_WITH_DATE-$$-old
+    g_runcmd $sshopts mv $BACKUPSRVPATH_WITH_DATE_INCOMPLETE $BACKUPSRVPATH_WITH_DATE || exit $?
+
+    # Cleanup old backups
+    yearmonth="$(date +%Y-%m-)"
+    yearmonthbefore="$(date +%Y-%m- --date='-1 month')"
+    echo "$sshopts find $BACKUPSRVPATH_WITH_HOST -mindepth 1 -maxdepth 1 -type d -name \"backup-*\" | egrep -v \"backup-$yearmonth|backup-$yearmonthbefore|backup-20[0-9][0-9]-[0-9][0-9]-01\" | xargs -r rm -r" >>$g_tmp/bcmd
+    g_echo "Cleaning up Backupdir $BACKUPDIR with '$(cat $g_tmp/bcmd)'"
+    g_runcmd bash $g_tmp/bcmd || exit $?
+
+  done
+
+  g_echo "Backup-Skript beendet"
+}