Add initial rc-power-management script

rc-power-management

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+#!/bin/sh
+
+###
+# Initialization.
+
+for file in arp ipmitool; do
+	if ! command -v $file > /dev/null; then
+		echo "Could not find the 'arp' command. Exiting." >&2
+		exit 1
+	fi
+done
+
+###
+# Command-line argument handling.
+
+if [ "$#" -le 2 ]; then
+	echo "Usage: rc-power-management MACHINE_NAME IPMI_COMMAND" >&2
+	exit 1
+fi
+
+machine_name=$1
+ipmi_command=$(echo "$@" | cut --delimiter ' ' --fields 1 --complement )
+
+###
+# Configuration handling.
+
+if [ -f 'rc-power-management.conf' ]; then
+	conf=rc-power-management.conf
+elif [ -f '/etc/rc-power-management.conf' ]; then
+	conf=/etc/rc-power-management.conf
+fi
+
+if [ "$conf" = "" ]; then
+	echo "Could not find configuration file. Exiting." >&2
+	exit 1
+fi
+
+match=$(grep --max-count 1 "$NAME" < $conf)
+if [ "$match" = "" ]; then
+	echo "Could not find machine $machine_name in $conf. Exiting." >&2
+	exit 1
+fi
+
+macaddr=$(echo "$match" | cut -d ',' -f 2)
+ipmi_user=$(echo "$match" | cut -d ',' -f 3)
+ipmi_password=$(echo "$match" | cut -d ',' -f 4)
+
+###
+# Executing IPMI call.
+
+ipaddr=$(arp -a | grep "$macaddr" | sed -n 's/^.*(\(.*\)) .*$/\1/p')
+echo "Executing '$ipmi_command' for $machine_name against $ipaddr..."
+
+# shellcheck disable=SC2086
+ipmitool -I lanplus -H "$ipaddr" -U "$ipmi_user" -P "$ipmi_password" $ipmi_command

rc-power-management.example.conf

@@ -0,0 +1 @@
+demo,2c:3a:fd:f6:13:0e,user,password