Wait for activating systemd mount units

mount-waiter.sh

#!/bin/bash

wait_for_mounts() {
	local timestamp=$(date -d 1min +%s)
	timeleft() {
		[[ $(date +%s) -lt $timestamp ]] && return 0
		return 1 # Timeout, $timestamp passed
	}
	activating_mounts() {
    # Get list of units
		systemctl list-units --type mount --state activating --quiet
	}

	while timeleft; do
		[[ -n $(activating_mounts) ]] || break
		sleep 1
	done
  # Check again and use that as return status
	[[ -z $(activating_mounts) ]]
}

wait_for_mounts || echo "Timed out waiting for mounts" >&2