From 32dc5354e2916387a2c62eadae0a4568023f1151 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Tue, 3 Jun 2014 16:47:36 +0200
Subject: Initial commit

---
 scripts/ldadp-launcher | 86 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100755 scripts/ldadp-launcher

(limited to 'scripts/ldadp-launcher')

diff --git a/scripts/ldadp-launcher b/scripts/ldadp-launcher
new file mode 100755
index 0000000..be73ec7
--- /dev/null
+++ b/scripts/ldadp-launcher
@@ -0,0 +1,86 @@
+#!/bin/bash
+
+if [ $# -lt 2 ]; then
+	echo "Invalid parameter count: '$#'"
+	exit 1
+fi
+
+BASE="$1"
+shift
+
+if [ -z "$BASE" ] || [ ! -r "$BASE" ] || [ ! -d "$BASE" ]; then
+	echo "Basedir invalid: '$BASE'"
+	exit 2
+fi
+cd "$BASE"
+
+[ "x$1" == "x--" ] && shift
+
+# At this point $@ should only be ldadp instance ids
+
+inArray () {
+	local e
+	for e in "${@:2}"; do
+		[[ "x$e" == "x$1" ]] && return 0
+	done
+	return 1
+}
+
+isInstance () {
+	if [ $# -ne 1 ]; then
+		echo "isInstance needs 1 param, got $#"
+		return 0
+	fi
+	[ -L "/proc/$1/exe" ] && [ -r "/proc/$1/exe" ] && [[ "$(readlink -f "/proc/$1/exe")" == *ldadp ]] && return 0
+	return 1
+}
+
+launch () {
+	local CONFIG="${BASE}/configs/${1}.cfg"
+	if [ ! -r "$CONFIG" ]; then
+		echo "Told to start ldadp for module '${1}', but no config file found!"
+		return 1
+	fi
+	echo "Launching #$1"
+	"${BASE}/ldadp" -n "$CONFIG" &
+	local P=$!
+	sleep 1
+	if ! kill -0 "$P" 2>/dev/null; then
+		echo "...FAILED!"
+		return 1
+	fi
+	echo -n "$P" > "${BASE}/pid/${1}"
+	return 0
+}
+
+for FILE in $(find "$BASE/pid" -type f -regextype posix-extended -regex "(^|.*/)[0-9]+$"); do
+	ID=$(basename $FILE)
+	PID=$(<$FILE)
+	if ! [[ "$PID" =~ ^[0-9]+$ ]]; then
+		echo "Invalid PID file: '$FILE'"
+		unlink "$FILE"
+	fi
+	inArray $ID "$@" && isInstance $PID && continue # Should be running, is running, nothing to do
+	#
+	unlink "$FILE"
+	if inArray $ID; then
+		# Should be running, is not running, launch!
+		launch $ID
+	elif isInstance $PID; then
+		# Is running, should not, kill
+		kill $PID
+		sleep 1
+		isInstance $PID && kill -9 $PID
+	fi
+done
+
+while [ $# -gt 0 ]; do
+	ID=$1
+	shift
+	FILE="${BASE}/pid/${ID}"
+	[ -r "$FILE" ] && isInstance $(<$FILE) && continue
+	launch $ID
+done
+
+exit 0
+
-- 
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