serv: add usage command

bin/serv

@@ -132,6 +132,9 @@ check_command()
     status)                   # HELPCMD: show service status
         serv_cmd=status
         ;;
+    usage)                    # HELPCMD: print out usage of the service
+        serv_cmd=usage
+        ;;
     #restart)                 # HELPCMD: restart service
     #reload)                  # HELPCMD: reload service
     start)                    # HELPCMD: start service

bin/serv-usage

+#!/bin/sh
+#
+# Copyright (C) 2012  Etersoft
+# Copyright (C) 2012  Vitaly Lipatov <lav@etersoft.ru>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+#
+
+# Print usage of the service
+serv_usage()
+{
+	local SERVICE="$1"
+	shift
+	case $SERVICETYPE in
+		service-chkconfig|service-upstart)
+			# CHECKME: many services print out usage in stderr, it conflicts with printout command
+			#sudocmd service $SERVICE 2>&1
+			$SUDO service $SERVICE 2>&1
+			;;
+		service-initd|service-update)
+			#sudocmd /etc/init.d/$SERVICE 2>&1
+			$SUDO service $SERVICE 2>&1
+			;;
+		systemd)
+			sudocmd systemctl $SERVICE 2>&1
+			;;
+		*)
+			fatal "Do not known command for $SERVICETYPE"
+			;;
+	esac
+
+}