Script for starting services and mouning filesystems

This script handles mounting of defined mountpoints and starts services via systemctl. I use it to start and mount all necessary services for my Raspberry PI.


Service/Mountpoint definition syntax:

• M:0:/mnt/storage

• S:1:transmission 

M stands for mountpoint, S for service.
0 defines service which needs to be started successfully, otherwise the script will end.
Services with 1 can fail during start without any effect on next script execution.

#!/bin/bash
##############
# krisko 2014
# script for starting services with systemctl and mounting FS
##############

# we need to run this as root
[ "$UID" == 0 ] || exec sudo $0

# JOB QUEUE: M -mountpoint, S -service; 0 -exit on fail, 1 -dont exit on fail
QUEUE=('M:0:/mnt/storage' 'S:1:transmission' 'S:0:mysqld' 'S:1:php-fpm' 'S:1:nginx' 'S:1:rpc-mountd' 'S:1:fail2ban')

# handle mounting
M() {
    if [ $(mount | grep -c " $2 ") -ge 1 ]; then
        echo INFO: $2 already mounted, skipping...
    else
        echo INFO: mounting $2
        if [ $(mount $2 2>/dev/null; echo $?) -ne 0 ]; then
            if [ $1 -eq 0 ]; then
                echo FATAL: failed mounting $2
                return 1
            else
                echo ERROR: failed mounting $2
            fi
        fi
    fi
}

# handle service starting
S() {
    if [ $(systemctl status $2 | grep -q "(running)"; echo $?) -eq 0 ]; then
        echo INFO: $2 already running, skipping...
    else
        echo INFO: starting $2
        if [ $(systemctl start $2 1>/dev/null 2>&1; echo $?) -ne 0 ]; then
            if [ $1 -eq 0 ]; then
                echo FATAL: failed to start $2, see \'systemctl status $2\' for more details
                return 1
            else
                echo ERROR: failed to start $2, see \'systemctl status $2\' for more details
            fi
        fi
    fi
}

# export functions to sub-shell, so they can be called from awk
export -f M S

for JOB in ${QUEUE[*]}; do
    echo | awk -v JOB="$JOB" '{
    gsub(":"," ",JOB)
    if ( system(JOB) == 1 )
        exit 1
    }'
    # exit on fail
    [ $(echo $?) -ne 1 ] || exit 1
done

exit 0

##################
# ChangeLog/TODO #
##################
# 1.0.0 20140101   Genesis
# 1.0.1 20140312   Changed services starting order
##################