cnssh: Refactored to support authentication on remote devices

.bashrc.d/cnssh.bash

@@ -1,16 +1,103 @@
-cnssh() {
-	# Usage: cnssh <ip address> [command]
-	local uname="Crestron"
-	local pass=""
-	local addr="$1"
-	shift
-	local cmd="$@" 
+cnssh() {	# Helper for sshing into Crestron devices
+		# 
+		# USAGE
+		#
+		#	cnssh <ip address> [command]
+		#
+		#
+		# OPTIONS
+		#
+		#	-u <username>		Specify the username to use with ssh
+		#				  Default: "Crestron"
+		#
+		# CONFIG ARRAY: cnssh_conf
+		#
+		#
+		#	| Option	| Valid Args	| Default	| Description					|
+		#	| ------------- | ------------- | ------------- | --------------------------------------------- |
+		#	| uname		| <string>	| "Crestron"	| The username for use with ssh			|
+		#	| pass		| <string>	| ""		| The password for use with ssh (via sshpass)	|
+		#	| addr		| <string>	| <ip address>	| The address of the remote device		|
+		#	| cmd		| <string>	| [command]	| The command to execute on the remote device	|
 
-	sshpass -p "$pass" ssh \
+
+	####
+	# Config init
+
+	# Initialize config array if it doesn't already exist
+	if [[ ! -v cnssh_conf[@] ]]; then
+		declare -A cnssh_conf
+	fi
+
+	# Initialize and populate default config array
+	declare -A dconf
+	dconf=(
+		[uname]="Crestron"
+		[pass]=""
+	)
+
+	# Config init
+	####
+
+
+	####
+	# Option Parsing
+
+	while getopts ":u:" opt; do
+		case $opt in
+			u)
+				cnssh_conf[uname]="$OPTARG"
+				;;
+			\?)
+				echo "Unknown option -$OPTARG"
+				return 1
+				;;
+			:)
+				echo "Option requires argument: -$OPTARG"
+				return 1
+				;;
+		esac
+	done
+
+	# Remove parsed options from $@
+	shift $((OPTIND -1))
+
+	# Set the address based on the first 
+	#  arg if not already set in config array
+	if [[ ! -v cnssh_conf[addr] ]]; then
+		cnssh_conf[addr]="$1"
+		shift 1
+	fi
+
+	# Set the command as the rest of argv
+	#  if not already set in config array
+	if [[ ! -v cnssh_conf[cmd] ]]; then
+		cnssh_conf[cmd]="$*"
+	fi
+
+	# Apply defaults to running config
+	for opt in "${!dconf[@]}"; do
+		# Don't apply the default if it's already set
+		if [[ ! -v cnssh_conf[$opt] ]]; then
+			cnssh_conf[$opt]=${dconf[$opt]}
+		fi
+	done
+
+	# Option Parsing
+	####
+
+
+	####
+	# Main
+
+	sshpass -p "${cnssh_conf[pass]}" ssh \
 		-o StrictHostKeyChecking=no\
 		-o GlobalKnownHostsFile=/dev/null\
 		-o UserKnownHostsFile=/dev/null\
 		-o LogLevel=ERROR\
-		-o User="$uname"\
-		"$addr" "$cmd"
+		-o User="${cnssh_conf[uname]}"\
+		"${cnssh_conf[addr]}" "${cnssh_conf[cmd]}"
+
+	# Main
+	####
 }