From 39fab1f2d65d652d48ec94123b1c7191c78932f3 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Fri, 27 Jun 2014 21:21:11 +0200
Subject: Better error handling for ldadp launching

---
 scripts/ldadp-launcher | 27 ++++++++++++++++-----------
 1 file changed, 16 insertions(+), 11 deletions(-)

(limited to 'scripts')

diff --git a/scripts/ldadp-launcher b/scripts/ldadp-launcher
index be73ec7..2bd8b90 100755
--- a/scripts/ldadp-launcher
+++ b/scripts/ldadp-launcher
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 if [ $# -lt 2 ]; then
-	echo "Invalid parameter count: '$#'"
+	echo "Invalid parameter count: '$#'" >&2
 	exit 1
 fi
 
@@ -9,7 +9,7 @@ BASE="$1"
 shift
 
 if [ -z "$BASE" ] || [ ! -r "$BASE" ] || [ ! -d "$BASE" ]; then
-	echo "Basedir invalid: '$BASE'"
+	echo "Basedir invalid: '$BASE'" >&2
 	exit 2
 fi
 cd "$BASE"
@@ -28,7 +28,7 @@ inArray () {
 
 isInstance () {
 	if [ $# -ne 1 ]; then
-		echo "isInstance needs 1 param, got $#"
+		echo "isInstance needs 1 param, got $#" >&2
 		return 0
 	fi
 	[ -L "/proc/$1/exe" ] && [ -r "/proc/$1/exe" ] && [[ "$(readlink -f "/proc/$1/exe")" == *ldadp ]] && return 0
@@ -38,21 +38,27 @@ isInstance () {
 launch () {
 	local CONFIG="${BASE}/configs/${1}.cfg"
 	if [ ! -r "$CONFIG" ]; then
-		echo "Told to start ldadp for module '${1}', but no config file found!"
+		echo "Told to start ldadp for module '${1}', but no config file found!" >&2
 		return 1
 	fi
 	echo "Launching #$1"
-	"${BASE}/ldadp" -n "$CONFIG" &
+	local LOGFILE="${BASE}/logs/${1}.log"
+	if [ ! -w "${BASE}/logs" ] || [ -e "$LOGFILE" -a ! -w "$LOGFILE" ]; then
+		LOGFILE="/dev/null"
+	fi
+	"${BASE}/ldadp" -n "$CONFIG" > "$LOGFILE" &
 	local P=$!
 	sleep 1
 	if ! kill -0 "$P" 2>/dev/null; then
-		echo "...FAILED!"
+		echo "...FAILED to launch #$1" >&2
 		return 1
 	fi
 	echo -n "$P" > "${BASE}/pid/${1}"
 	return 0
 }
 
+RETVAL=0
+
 for FILE in $(find "$BASE/pid" -type f -regextype posix-extended -regex "(^|.*/)[0-9]+$"); do
 	ID=$(basename $FILE)
 	PID=$(<$FILE)
@@ -63,10 +69,7 @@ for FILE in $(find "$BASE/pid" -type f -regextype posix-extended -regex "(^|.*/)
 	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
+	if isInstance $PID; then
 		# Is running, should not, kill
 		kill $PID
 		sleep 1
@@ -80,7 +83,9 @@ while [ $# -gt 0 ]; do
 	FILE="${BASE}/pid/${ID}"
 	[ -r "$FILE" ] && isInstance $(<$FILE) && continue
 	launch $ID
+	RET=$?
+	[ "$RET" != "0" ] && RETVAL=1
 done
 
-exit 0
+exit "$RETVAL"
 
-- 
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