sysklogd: rewrite init script

- Split it into S01syslogd and S02klogd to make every init script be
  called the same as the executable it starts.
- Implement start, stop, restart and reload as functions, like in other
  init scripts, using start-stop-daemon.
- Indent with tabs, not spaces.
- Detect and report start/stop errors (previous version ignored them and
  always reported OK).
- Support /etc/default/$DAEMON configuration files.
- Do not kill syslogd in "reload". Send a SIGHUP signal, instructing it
  to perform a re-initialization.
- Do not kill klogd in "reload". Send a signal (default 0, which does
  nothing).  Users can configure this signal in /etc/default/klogd to
  either SIGUSR1 or SIGUSR2.

Signed-off-by: Carlos Santos <casantos@datacom.com.br>
Reviewed-by: Matt Weber <matthew.weber@rockwellcollins.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

1 files changed, 65 insertions, 0 deletions

diff --git a/package/sysklogd/S02klogd b/package/sysklogd/S02klogd
new file mode 100644
index 0000000000..93f39e1f0e
--- /dev/null
+++ b/package/sysklogd/S02klogd
@@ -0,0 +1,65 @@
+#!/bin/sh
+
+DAEMON="klogd"
+PIDFILE="/var/run/$DAEMON.pid"
+
+KLOGD_ARGS=""
+
+KLOGD_RELOAD="0"
+
+# shellcheck source=/dev/null
+[ -r "/etc/default/$DAEMON" ] && . "/etc/default/$DAEMON"
+
+start() {
+	printf 'Starting %s: ' "$DAEMON"
+	# shellcheck disable=SC2086 # we need the word splitting
+	start-stop-daemon -S -q -p "$PIDFILE" -x "/sbin/$DAEMON" \
+		-- $KLOGD_ARGS
+	status=$?
+	if [ "$status" -eq 0 ]; then
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+	return "$status"
+}
+
+stop() {
+	printf 'Stopping %s: ' "$DAEMON"
+	start-stop-daemon -K -q -p "$PIDFILE"
+	status=$?
+	if [ "$status" -eq 0 ]; then
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+	return "$status"
+}
+
+restart() {
+	stop
+	sleep 1
+	start
+}
+
+# SIGUSR1 makes klogd reload kernel module symbols
+# SIGUSR2 makes klogd reload static kernel symbols and kernel module symbols
+reload() {
+	printf 'Reloading %s: ' "$DAEMON"
+	start-stop-daemon -K -s "$KLOGD_RELOAD" -q -p "$PIDFILE"
+	status=$?
+	if [ "$status" -eq 0 ]; then
+		echo "OK"
+	else
+		echo "FAIL"
+	fi
+	return "$status"
+}
+
+case "$1" in
+        start|stop|restart|reload)
+                "$1";;
+        *)
+                echo "Usage: $0 {start|stop|restart|reload}"
+                exit 1
+esac