tmutil-safe-nas-backup

#!/bin/bash
# Author: http://brablc.com/
# Repo:   https://github.com/brablc/clit/blob/master/tmutil-safe-nas-backup
#
# Requirements: NoSleepCtrl from http://code.google.com/p/macosx-nosleep-extension/issues/detail?id=28#c8 - take Volanins built (see the issue)

function tmrunning() {
    return $([ $(tmutil currentphase) != 'BackupNotRunning' ])
}

function echostate() {
    DATE=$(date +"%Y-%m-%d %H:%M:%S")
    STATE=$1
    shift
    OPT=""
    if [ "$STATE" = "-n" ]; then 
        OPT=$STATE
        STATE=$1
        shift
    fi
    echo $OPT "-$STATE|$DATE|" $* 
}

function tmrun() {
    hash NoSleepCtrl 2>/dev/null
    HASNOSLEEP=$?
    if [ $HASNOSLEEP ]; then
        NOSLEEPSAVESTATE=$(NoSleepCtrl -v 0 -g)    
        NoSleepCtrl -s 1
        echostate I "Engaging NoSleep."
    fi
    echostate I "Starting backup."
    tmutil startbackup
    echostate -n I "Waiting for backup to come up ... "

    MAXWAIT=180
    for I in `seq 1 $MAXWAIT`; do
        if tmrunning; then
            break;
        fi
        echo -n "#"
        sleep 1;
    done
    echo ""

    if [[ $I == $MAXWAIT ]]; then
        echostate E "Backup did not come up within 60 seconds."
    else 
        while tmrunning; do
            NEWPHASE=$(tmutil currentphase)
            if [ "$PHASE" != "$NEWPHASE" ]; then
                echostate I "Current phase: $NEWPHASE"
                PHASE=$NEWPHASE
            fi 
            sleep 10
        done

        echostate I "Finished backup."
    fi

    if [ $HASNOSLEEP ]; then
        echostate I "Returning NoSleep to original state."
        NoSleepCtrl -s $NOSLEEPSAVESTATE
    fi
}

if tmrunning; then
    echostate W "Backup is already running. Exiting ..."
    exit 1
fi

if [[ $# == 0 ]]; then
    caffeinate $0 RUN
else
    tmrun
fi