Ensures sdcard in macbook used for time capsule backups is always mounted.

mounter.sh

#!/bin/bash
#
# Ensures sd card in macbook used for timecapsule backups is always mounted.
# Gets encryption password from keychain.
#
# Put this file in /usr/local/bin/mounter.sh
#
# Edit the volume name and disk id of sd card
#
# Add to crontab by running 'crontab -e' and adding following line
#     * * * * * /usr/local/bin/mounter.sh
#

function mount_it {
  label="$1"
  uuid="$2"
  if [ $(df | grep -c "/Volumes/${label}") -eq 0 ]
  then
    device=$(/usr/bin/sudo /usr/sbin/diskutil list | /usr/bin/grep "APFS Volume ${label}" | /usr/bin/sed -e 's/.*disk/disk/')
    /usr/bin/sudo /usr/sbin/diskutil apfs unlockVolume  /dev/${device} -passphrase "$(/usr/bin/security find-generic-password -s $uuid -w 2>/dev/null | sed -e 's/00$//' | xxd -r -p )"
    /use/bin/sudo /use/sbin/diskutil mount /dev/${device} > /dev/null 2> /dev/null
  fi
}

mount_it volume_name volume_id
# example: mount_it microSD 0384F0A9-4089-4793-A943-9AA86A954F13