get-containers-list
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	dereckson
	Dec 27 2015, 19:10

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get-containers-list
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	#!/usr/bin/env bash
	## Read /etc/containers.conf and recover docker’s names into an array.
	## get-containers-list [--revert]

	file='/etc/containers.conf'

	if [[ ! -f "$file" ]]; then

	echo "$file : does not exists "
	exit 1
	elif [[ ! -r "$file" ]]; then

	echo "$file : can not read "
	fi

	#Get names in an array
	# 21:42 <geirha> since bash 4, you can use mapfile instead of that while read loop. mapfile -t array < "$file"

	mapfile -t array < "$file"

	#Test argument to know in wich order return names
	if [[ $1 == "--revert" ]]; then
	for ((i="${#array[*]}"; i > 0; i--)) ; do

	echo "${array[i]}"
	done

	elif [[ -z "$1" ]] ; then
	for ((i=0; i < "${#array[*]}"; i++)) ; do

	echo "${array[i]}"
	done

	else
	echo "$1 is not a valid argument"
	fi