#!/bin/bash

# Start a systemtap server
#
# Copyright (C) 2008-2011 Red Hat Inc.
#
# This file is part of systemtap, and is free software.  You can
# redistribute it and/or modify it under the terms of the GNU General
# Public License (GPL); either version 2, or (at your option) any
# later version.

# This script attempts to start a systemtap server and echoes the
# process id, if successful.

# Initialize the environment
. ${PKGLIBEXECDIR}stap-env

startup_timeout=10

# start the server
cd / # change to a dir we're 100% sure we have RD_ONLY access to
${stap_pkglibexecdir}stap-serverd "$@" </dev/null >/dev/null 2>/dev/null &
server_pid=$!

# Make sure the server is started
for ((attempt=0; $attempt < $startup_timeout; ++attempt))
do
    # Has the server started?
    if ! (ps -e | grep stap-serverd | grep $server_pid) >/dev/null 2>&1; then
        sleep 1
        continue
    fi

    # The server is ready
    echo $server_pid
    exit 0
done

echo -n "Unable to start a systemtap server: " >&2
echo "${stap_pkglibexecdir}stap-serverd did not start" >&2

exit 1 # server did not start
