runplain.sh improvements

installer/resources/runplain.sh

@@ -15,16 +15,40 @@ I2P="%INSTALL_PATH"
 I2PTEMP="%SYSTEM_java_io_tmpdir"
 
 # Having IPv6 enabled can cause problems with certain configurations. Changing the
-# next value to true may help. 
+# next value to true may help.
 PREFERv4="false"
 CP=
 
-for jars in `ls ${I2P}/lib/*.jar`; do CP=${CP}:${jars}; done
-JAVA=java
+# Try using the Java binary that I2P was installed with.
+# If it's not found, try looking in the system PATH.
+JAVA=$(which %JAVA_HOME/bin/java || which java)
 
-if [ "`uname -s`" = "Darwin" ]; then
+if [ -z $JAVA ] || [ ! -x $JAVA ]; then
+    echo "Error: Cannot find java." >&2
+    exit 1
+fi
+
+for jar in `ls ${I2P}/lib/*.jar`; do
+    if [ ! -z $CP ]; then
+        CP=${CP}:${jar};
+    else
+        CP=${jar}
+    fi
+done
+
+if [ $(uname -s) = "Darwin" ]; then
     export JAVA_TOOL_OPTIONS="-Djava.awt.headless=true"
 fi
 JAVAOPTS="-Djava.net.preferIPv4Stack=${PREFERv4} -Djava.library.path=${I2P}:${I2P}/lib -Di2p.dir.base=${I2P} -DloggerFilenameOverride=logs/log-router-@.txt"
-nohup ${JAVA} -cp "${CP}" ${JAVAOPTS} net.i2p.router.RouterLaunch > /dev/null 2>&1 &
-echo $! > "${I2PTEMP}/router.pid"
+(
+    nohup ${JAVA} -cp \"${CP}\" ${JAVAOPTS} net.i2p.router.RouterLaunch > /dev/null 2>&1
+) &
+PID=$!
+
+if [ ! -z $PID ] && kill -0 $PID > /dev/null 2>&1 ; then
+    echo "I2P started [$PID]" >&2
+    echo $PID > "${I2PTEMP}/router.pid"
+else
+    echo "I2P failed to start." >&2
+    exit 1
+fi