import pwd
import tempfile
import threading
+import fcntl
import logger
os.umask(0)
devnull = os.open(os.devnull, os.O_RDWR)
os.dup2(devnull, 0)
- crashlog = os.open('/root/nm.stderr', os.O_RDWR | os.O_APPEND | os.O_CREAT, 0644)
+ # xxx fixme - this is just to make sure that nothing gets stupidly lost - should use devnull
+ crashlog = os.open('/var/log/nm.daemon', os.O_RDWR | os.O_APPEND | os.O_CREAT, 0644)
os.dup2(crashlog, 1)
os.dup2(crashlog, 2)
try: do_write(f)
finally: f.close()
return temporary_filename
+
+
+class NMLock:
+ def __init__(self, file):
+ logger.log("Lock %s initialized." % file, 2)
+ self.fd = os.open(file, os.O_RDWR|os.O_CREAT, 0600)
+ flags = fcntl.fcntl(self.fd, fcntl.F_GETFD)
+ flags |= fcntl.FD_CLOEXEC
+ fcntl.fcntl(self.fd, fcntl.F_SETFD, flags)
+ def __del__(self):
+ os.close(self.fd)
+ def acquire(self):
+ logger.log("Lock acquired.", 2)
+ fcntl.lockf(self.fd, fcntl.LOCK_SH)
+ def release(self):
+ logger.log("Lock released.", 2)
+ fcntl.lockf(self.fd, fcntl.LOCK_UN)