Source tree reorg, phase 1. Almost everything moved, no file contents changed.

svn path=/branches/tk685/; revision=5757

1 files changed, 133 insertions, 0 deletions

diff --git a/rpki/daemonize.py b/rpki/daemonize.py
new file mode 100644
index 00000000..62b4ee4e
--- /dev/null
+++ b/rpki/daemonize.py
@@ -0,0 +1,133 @@
+# $Id$
+# 
+# Copyright (C) 2012  Internet Systems Consortium ("ISC")
+# 
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+# 
+# THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+# REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+# AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+# INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+# LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+# OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+# PERFORMANCE OF THIS SOFTWARE.
+#
+# Some code borrowed from 
+#   http://www.jejik.com/articles/2007/02/a_simple_unix_linux_daemon_in_python/
+# 
+# (which was explicitly placed in public domain by its author), and from
+# 
+#   /usr/src/lib/libc/gen/daemon.c
+# 
+# (the libc implementation of daemon(3) on FreeBSD), so:
+# 
+# Portions copyright (c) 1990, 1993
+#        The Regents of the University of California.  All rights reserved.
+# 
+#   Redistribution and use in source and binary forms, with or without
+#   modification, are permitted provided that the following conditions
+#   are met:
+#   1. Redistributions of source code must retain the above copyright
+#      notice, this list of conditions and the following disclaimer.
+#   2. Redistributions in binary form must reproduce the above copyright
+#      notice, this list of conditions and the following disclaimer in the
+#      documentation and/or other materials provided with the distribution.
+#   4. Neither the name of the University nor the names of its contributors
+#      may be used to endorse or promote products derived from this software
+#      without specific prior written permission.
+# 
+#   THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+#   ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+#   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+#   ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+#   FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+#   DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+#   OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+#   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+#   LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+#   OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+#   SUCH DAMAGE.
+
+"""
+Make a normal program into a "daemon", like the 4.4BSD daemon(3) call.
+
+This doesn't quite follow either the 4.4BSD call or the Python 3.x library,
+because it was written to fit into an existing package and I didn't
+want to drag in yet another external library just for this.
+"""
+
+import sys
+import os
+import atexit
+import signal
+import rpki.log
+
+# Does default_pid_directory need to be autoconf-configurable?
+
+## @var default_pid_directory
+# Default directory to which to write process ID files.
+
+default_pid_directory = "/var/run/rpki"
+
+## @var pid_filename
+# Configurable filename to which to write process ID file.
+# pidfile argument to daemon() overrides this.
+
+pid_filename = None
+
+def daemon(nochdir = False, noclose = False, pidfile = None):
+  """
+  Make this program become a daemon, like 4.4BSD daemon(3), and
+  write its pid out to a file with cleanup on exit.
+  """
+
+  if pidfile is None:
+    if pid_filename is None:
+      prog = os.path.splitext(os.path.basename(sys.argv[0]))[0]
+      pidfile = os.path.join(default_pid_directory, "%s.pid" % prog)
+    else:
+      pidfile = pid_filename
+
+  old_sighup_action = signal.signal(signal.SIGHUP, signal.SIG_IGN)
+
+  try: 
+    pid = os.fork() 
+  except OSError, e: 
+    sys.exit("fork() failed: %d (%s)" % (e.errno, e.strerror))
+  else:
+    if pid > 0:
+      os._exit(0)
+	
+  if not nochdir:
+    os.chdir("/") 
+
+  os.setsid() 
+
+  if not noclose:
+    sys.stdout.flush()
+    sys.stderr.flush()
+    fd = os.open(os.devnull, os.O_RDWR)
+    os.dup2(fd, 0)
+    os.dup2(fd, 1)
+    os.dup2(fd, 2)
+    if fd > 2:
+      os.close(fd)
+
+  signal.signal(signal.SIGHUP, old_sighup_action)
+
+  def delete_pid_file():
+    try:
+      os.unlink(pidfile)
+    except OSError:
+      pass
+
+  atexit.register(delete_pid_file)
+
+  try:
+    f = open(pidfile, "w")
+    f.write("%d\n" % os.getpid())
+    f.close()
+  except IOError, e:
+    rpki.log.warn("Couldn't write PID file %s: %s" % (pidfile, e.strerror))