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Diffstat (limited to 'gnuradio-core/src/python/gnuradio/gruimpl/daemon.py')
| -rw-r--r-- | gnuradio-core/src/python/gnuradio/gruimpl/daemon.py | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/gnuradio-core/src/python/gnuradio/gruimpl/daemon.py b/gnuradio-core/src/python/gnuradio/gruimpl/daemon.py deleted file mode 100644 index e04702152d..0000000000 --- a/gnuradio-core/src/python/gnuradio/gruimpl/daemon.py +++ /dev/null @@ -1,102 +0,0 @@ -# -# Copyright 2008 Free Software Foundation, Inc. -# -# This file is part of GNU Radio -# -# GNU Radio is free software; you can redistribute it and/or modify -# it under the terms of the GNU General Public License as published by -# the Free Software Foundation; either version 3, or (at your option) -# any later version. -# -# GNU Radio is distributed in the hope that it will be useful, -# but WITHOUT ANY WARRANTY; without even the implied warranty of -# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -# GNU General Public License for more details. -# -# You should have received a copy of the GNU General Public License -# along with GNU Radio; see the file COPYING. If not, write to -# the Free Software Foundation, Inc., 51 Franklin Street, -# Boston, MA 02110-1301, USA. -# -import os, sys, signal - -# Turn application into a background daemon process. -# -# When this function returns: -# -# 1) The calling process is disconnected from its controlling terminal -# and will not exit when the controlling session exits -# 2) If a pidfile name is provided, it is created and the new pid is -# written into it. -# 3) If a logfile name is provided, it is opened and stdout/stderr are -# redirected to it. -# 4) The process current working directory is changed to '/' to avoid -# pinning any filesystem mounts. -# 5) The process umask is set to 0111. -# -# The return value is the new pid. -# -# To create GNU Radio applications that operate as daemons, add a call to this -# function after all initialization but just before calling gr.top_block.run() -# or .start(). -# -# Daemonized GNU Radio applications may be stopped by sending them a -# SIGINT, SIGKILL, or SIGTERM, e.g., using 'kill pid' from the command line. -# -# If your application uses gr.top_block.run(), the flowgraph will be stopped -# and the function will return. You should allow your daemon program to exit -# at this point. -# -# If your application uses gr.top_block.start(), you are responsible for hooking -# the Python signal handler (see 'signal' module) and calling gr.top_block.stop() -# on your top block, and otherwise causing your daemon process to exit. -# - -def daemonize(pidfile=None, logfile=None): - # fork() into background - try: - pid = os.fork() - except OSError, e: - raise Exception, "%s [%d]" % (e.strerror, e.errno) - - if pid == 0: # First child of first fork() - # Become session leader of new session - os.setsid() - - # fork() into background again - try: - pid = os.fork() - except OSError, e: - raise Exception, "%s [%d]" % (e.strerror, e.errno) - - if pid != 0: - os._exit(0) # Second child of second fork() - - else: # Second child of first fork() - os._exit(0) - - os.umask(0111) - - # Write pid - pid = os.getpid() - if pidfile is not None: - open(pidfile, 'w').write('%d\n'%pid) - - # Redirect streams - if logfile is not None: - lf = open(logfile, 'a+') - sys.stdout = lf - sys.stderr = lf - - # Prevent pinning any filesystem mounts - os.chdir('/') - - # Tell caller what pid to send future signals to - return pid - -if __name__ == "__main__": - import time - daemonize() - print "Hello, world, from daemon process." - time.sleep(20) - print "Goodbye, world, from daemon process." |