Adds parameters in /etc/default/hudson and /etc/init.d/hudson to set the

max files opened limit.
In ubuntu, the pam config for the su command does not have pam_limits.so
enabled by default.
I think a sane default for hudson would be to not rely in the
distribution or the admin of the OS to manage those settings.

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@23842 71c3de6d-444a-0410-be80-ed276b4c234a

debian/hudson.default

@@ -29,6 +29,10 @@ RUN_STANDALONE=true
 HUDSON_LOG=/var/log/hudson/$NAME.log
 #HUDSON_LOG=daemon.info
 
+# OS LIMITS SETUP (disabled by default)
+#MAXOPENFILES=8192
+
+
 # arguments to pass to hudson.
 # --javahome=$JAVA_HOME
 # --httpPort=$HTTP_PORT (default 8080; disable with -1)

debian/hudson.init

@@ -62,6 +62,13 @@ do_start()
     #   1 if daemon was already running
     #   2 if daemon could not be started
     $DAEMON $DAEMON_ARGS --running && return 1
+
+    # If the var MAXOPENFILES is enabled in /etc/default/hudson then set the max open files to the 
+    # proper value
+    if [ -z "$MAXOPENFILES" ]; then
+      echo Setting up max open files limit to $MAXOPENFILES
+      ulimit -n $MAXOPENFILES
+    fi
     
     # --user in daemon doesn't prepare environment variables like HOME, USER, LOGNAME or USERNAME,
     # so we let su do so for us now