stap-start-server

   1 #!/bin/bash
   2
   3 # Start a systemtap server
   4 #
   5 # Copyright (C) 2008-2011 Red Hat Inc.
   6 #
   7 # This file is part of systemtap, and is free software.  You can
   8 # redistribute it and/or modify it under the terms of the GNU General
   9 # Public License (GPL); either version 2, or (at your option) any
  10 # later version.
  11
  12 # This script attempts to start a systemtap server and echoes the
  13 # process id, if successful.
  14
  15 # Initialize the environment
  16 . ${PKGLIBEXECDIR}stap-env
  17
  18 startup_timeout=10
  19
  20 # start the server
  21 cd / # change to a dir we're 100% sure we have RD_ONLY access to
  22 ${stap_pkglibexecdir}stap-serverd "$@" </dev/null >/dev/null 2>/dev/null &
  23 server_pid=$!
  24
  25 # Make sure the server is started
  26 for ((attempt=0; $attempt < $startup_timeout; ++attempt))
  27 do
  28     # Has the server started?
  29     if ! (ps -e | grep stap-serverd | grep $server_pid) >/dev/null 2>&1; then
  30         sleep 1
  31         continue
  32     fi
  33
  34     # The server is ready
  35     echo $server_pid
  36     exit 0
  37 done
  38
  39 echo -n "Unable to start a systemtap server: " >&2
  40 echo "${stap_pkglibexecdir}stap-serverd did not start" >&2
  41
  42 exit 1 # server did not start