/etc/rc.common: New file.

2 files changed, 103 insertions, 0 deletions

diff --git a/changelog b/changelog
index f10ff05..6b3611b 100644
--- a/changelog
+++ b/changelog
@@ -1,3 +1,10 @@
+busybox (1.21.1-5) trunk
+
+  * /etc/rc.common: New framework for service initialization scripts.
+  * Convert service scripts to use the new framework.
+
+ -- "P. J. McDermott" <pj@pehjota.net>  Mon, 02 Jun 2014 19:58:21 -0400
+
 busybox (1.21.1-4) trunk
 
   * /etc/init.d/httpd: Add missing space in start message.
diff --git a/src.etc/rc.common b/src.etc/rc.common
new file mode 100644
index 0000000..344e3e7
--- /dev/null
+++ b/src.etc/rc.common
@@ -0,0 +1,96 @@
+#!/bin/sh
+#
+# /etc/rc.common
+# Framework for service initialization scripts.
+#
+# Copyright (C) 2014  Patrick "P. J." McDermott
+#
+# This file may be reproduced, distributed, modified, and otherwise dealt in
+# under the terms of the Expat License.
+
+set -u
+
+SCRIPT=''
+LOG_MSG=''
+EXTRA_COMMANDS=''
+
+main()
+{
+	local action="${2}"
+	local all_cmds=
+	local es=
+
+	SCRIPT="${1}"
+
+	. "${SCRIPT}"
+
+	all_cmds=" start stop restart ${EXTRA_COMMANDS} "
+	if [ "x${all_cmds#* ${action} }" != "x${all_cmds}" ]; then
+		${action}
+		es=${?}
+		log_end ${es}
+		return ${es}
+	else
+		usage
+		return 1
+	fi
+}
+
+tty_printf()
+{
+	local tty="$(tty)" && printf "${@}" >"${tty}"
+}
+
+usage() {
+	local cmd=
+
+	tty_printf 'Usage: %s {start|stop|restart' "${SCRIPT}"
+	if [ "x${EXTRA_COMMANDS:+set}" = 'xset' ]; then
+		tty_printf '|%s' ${EXTRA_COMMANDS}
+	fi
+	tty_printf '}\n'
+}
+
+log()
+{
+	local fmt="${1}"
+	shift 1
+
+	LOG_MSG="$(printf "${fmt}" "${@}")"
+	tty_printf '[    ] %s...\r' "${LOG_MSG}"
+}
+
+log_end()
+{
+	local es="${1}"
+
+	case ${es} in
+		0)
+			tty_printf '[ ok ] %s... done.\n' \
+				"${LOG_MSG}"
+			;;
+		255)
+			tty_printf '[warn] %s... done.\n' \
+				"${LOG_MSG}"
+			;;
+		*)
+			tty_printf '[fail] %s... failed.\n' \
+				"${LOG_MSG}"
+			;;
+	esac
+}
+
+# Default function definitions
+
+stop()
+{
+	:
+}
+
+restart()
+{
+	stop
+	start
+}
+
+main "${@}"