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Unified Diff: tools/testrunner/server/daemon.py

Issue 11028027: Revert trunk to bleeding_edge at r12484 (Closed) Base URL: https://v8.googlecode.com/svn/trunk
Patch Set: Created 8 years, 2 months ago
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Index: tools/testrunner/server/daemon.py
diff --git a/tools/testrunner/server/daemon.py b/tools/testrunner/server/daemon.py
deleted file mode 100644
index baa66fbea91be0af914934e5aed56686938078fd..0000000000000000000000000000000000000000
--- a/tools/testrunner/server/daemon.py
+++ /dev/null
@@ -1,147 +0,0 @@
-#!/usr/bin/env python
-
-# This code has been written by Sander Marechal and published at:
-# http://www.jejik.com/articles/2007/02/a_simple_unix_linux_daemon_in_python/
-# where the author has placed it in the public domain (see comment #6 at
-# http://www.jejik.com/articles/2007/02/a_simple_unix_linux_daemon_in_python/#c6
-# ).
-# Some minor modifications have been made by the V8 authors. The work remains
-# in the public domain.
-
-import atexit
-import os
-from signal import SIGTERM
-from signal import SIGINT
-import sys
-import time
-
-
-class Daemon(object):
- """
- A generic daemon class.
-
- Usage: subclass the Daemon class and override the run() method
- """
- def __init__(self, pidfile, stdin='/dev/null',
- stdout='/dev/null', stderr='/dev/null'):
- self.stdin = stdin
- self.stdout = stdout
- self.stderr = stderr
- self.pidfile = pidfile
-
- def daemonize(self):
- """
- do the UNIX double-fork magic, see Stevens' "Advanced
- Programming in the UNIX Environment" for details (ISBN 0201563177)
- http://www.erlenstar.demon.co.uk/unix/faq_2.html#SEC16
- """
- try:
- pid = os.fork()
- if pid > 0:
- # exit first parent
- sys.exit(0)
- except OSError, e:
- sys.stderr.write("fork #1 failed: %d (%s)\n" % (e.errno, e.strerror))
- sys.exit(1)
-
- # decouple from parent environment
- os.chdir("/")
- os.setsid()
- os.umask(0)
-
- # do second fork
- try:
- pid = os.fork()
- if pid > 0:
- # exit from second parent
- sys.exit(0)
- except OSError, e:
- sys.stderr.write("fork #2 failed: %d (%s)\n" % (e.errno, e.strerror))
- sys.exit(1)
-
- # redirect standard file descriptors
- sys.stdout.flush()
- sys.stderr.flush()
- si = file(self.stdin, 'r')
- so = file(self.stdout, 'a+')
- se = file(self.stderr, 'a+', 0)
- # TODO: (debug) re-enable this!
- #os.dup2(si.fileno(), sys.stdin.fileno())
- #os.dup2(so.fileno(), sys.stdout.fileno())
- #os.dup2(se.fileno(), sys.stderr.fileno())
-
- # write pidfile
- atexit.register(self.delpid)
- pid = str(os.getpid())
- file(self.pidfile, 'w+').write("%s\n" % pid)
-
- def delpid(self):
- os.remove(self.pidfile)
-
- def start(self):
- """
- Start the daemon
- """
- # Check for a pidfile to see if the daemon already runs
- try:
- pf = file(self.pidfile, 'r')
- pid = int(pf.read().strip())
- pf.close()
- except IOError:
- pid = None
-
- if pid:
- message = "pidfile %s already exist. Daemon already running?\n"
- sys.stderr.write(message % self.pidfile)
- sys.exit(1)
-
- # Start the daemon
- self.daemonize()
- self.run()
-
- def stop(self):
- """
- Stop the daemon
- """
- # Get the pid from the pidfile
- try:
- pf = file(self.pidfile, 'r')
- pid = int(pf.read().strip())
- pf.close()
- except IOError:
- pid = None
-
- if not pid:
- message = "pidfile %s does not exist. Daemon not running?\n"
- sys.stderr.write(message % self.pidfile)
- return # not an error in a restart
-
- # Try killing the daemon process
- try:
- # Give the process a one-second chance to exit gracefully.
- os.kill(pid, SIGINT)
- time.sleep(1)
- while 1:
- os.kill(pid, SIGTERM)
- time.sleep(0.1)
- except OSError, err:
- err = str(err)
- if err.find("No such process") > 0:
- if os.path.exists(self.pidfile):
- os.remove(self.pidfile)
- else:
- print str(err)
- sys.exit(1)
-
- def restart(self):
- """
- Restart the daemon
- """
- self.stop()
- self.start()
-
- def run(self):
- """
- You should override this method when you subclass Daemon. It will be
- called after the process has been daemonized by start() or restart().
- """
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