tobias/radicale
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Merge pull request #339 from Unrud/patch-2

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Improve daemonization
This commit is contained in:
Guillaume Ayoub 2015-12-24 16:00:39 +01:00
commit 20960bee84
1 changed files with 21 additions and 5 deletions
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26
radicale/__main__.py
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@ -99,14 +99,30 @@ def run():
# Fork if Radicale is launched as daemon # Fork if Radicale is launched as daemon
if config.getboolean("server", "daemon"): if config.getboolean("server", "daemon"):
if os.path.exists(config.get("server", "pid")): # Check and create PID file in a race-free manner
raise OSError("PID file exists: %s" % config.get("server", "pid")) if config.get("server", "pid"):
try:
pid_fd = os.open(config.get("server", "pid"),
os.O_CREAT | os.O_EXCL | os.O_WRONLY)
except:
raise OSError("PID file exists: %s" %
config.get("server", "pid"))
pid = os.fork() pid = os.fork()
if pid: if pid:
sys.exit() sys.exit()
elif config.get("server", "pid"): # Write PID
open(config.get("server", "pid"), "w").write(str(os.getpid())) if config.get("server", "pid"):
sys.stdout = sys.stderr = open(os.devnull, "w") with os.fdopen(pid_fd, "w") as pid_file:
pid_file.write(str(os.getpid()))
# Decouple environment
os.umask(0)
os.chdir("/")
os.setsid()
with open(os.devnull, "r") as null_in:
os.dup2(null_in.fileno(), sys.stdin.fileno())
with open(os.devnull, "w") as null_out:
os.dup2(null_out.fileno(), sys.stdout.fileno())
os.dup2(null_out.fileno(), sys.stderr.fileno())
# Register exit function # Register exit function
def cleanup(): def cleanup():