#!/bin/bash
#
# SYNCRONISATION SCRIPT TO GOOGLE DRIVE
#
# Usage: gdrive_sync.sh [-n]
#
# Fri Aug 22 14:21:56 CEST 2014

### Config
RSYNCPARAMS="-aHvh --delete"
TMPFILE="/tmp/gdrive_sync.sh.tmp"               # Complete path with filename for mail content
EMAIL="hanr"            # Address where content or alert shoult be sent, semicolon sep.
FROM="gdrive-sync"
GDFSTOOL=/usr/local/bin/gdfstool
CREDFILE=/var/cache/gdfs/credcache
SRCFS="/mybook"                         
SOURCE="$SRCFS/backup"
MNTPT="/mnt"
DEST="$MNTPT/backup/`hostname`"
TIMESTART=`date +%s`
DRYRUN=

### Functions
f_sendmail() {
        if [ "$DRYRUN" ]; then
                cat $TMPFILE
        else
                cat $TMPFILE |mailx -a "From:$FROM" -s "GDrive Syncronization" $EMAIL  # Send mail with content of file
        fi
        exit 0
}
f_checkfs() {
        if [[ -z `mount |grep "$1 "` ]]; then
                echo "!!! Skipped GDrive Syncronization!! $1 not mounted" >>$TMPFILE
                f_sendmail
        fi
}
### SCRIPT
[ "`whoami`" != "root" ] && { echo "Must run as root"; exit 2; }

echo "++++++++++++++++++++++ GDrive sync start at `date +"%H:%M:%S"` +++++++++++++++++++++++" >$TMPFILE

if [ "$1" == "-n" ]; then
        RSYNCPARAMS="$RSYNCPARAMS -n"; DRYRUN=1
        echo "RUNNING IN DRY MODE"
fi



# Check if relevent FS are mounted and dirs exist
[ -x $GDFSTOOL ] || { echo "$GDFSTOOL not found or executable"; exit 2; }
[ -r $CREDFILE ] || { echo "$CREDFILE not found or readable"; exit 2; }
$GDFSTOOL mount $CREDFILE $MNTPT
f_checkfs $MNTPT
f_checkfs $SRCFS

[ -d $DEST ] || mkdir -p $DEST

# Do the sync
rsync $RSYNCPARAMS $SOURCE $DEST >> $TMPFILE
printf "\n\n++++++++++++++++++++++ GDrive sync end at `date +"%H:%M:%S"` +++++++++++++++++++++++" >>$TMPFILE
TIMESTOP=`date +%s`
printf "\n++++++++++++++++++++++++++ Duration `expr $TIMESTOP - $TIMESTART`sec +++++++++++++++++++++++++++" >>$TMPFILE

umount $MNTPT
f_sendmail