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Full Discussion: Should a UNIX daemon process close open fds?
Top Forums UNIX for Dummies Questions & Answers Should a UNIX daemon process close open fds? Post 30570 by kunalashar on Thursday 24th of October 2002 01:30:30 AM
Old 10-24-2002
Should a UNIX daemon process close open fds?
I have a UNIX daemon process that's been started by a parent process, an application server.
The behavior of this daemon process is to inherit and use the app
server's file descriptors (ports/sockets).
When I shutdown the app server, the daemon continues to run, because there may be other applications that want to use it.
However, the app server won't restart, because the daemon process is holding its parents' ports.
There is a debate as to whether its the app server's or the daemon's responsibility to close the file descriptors (say, using fcntl(...)).
Which process has the responsibility of closing the open file
descriptors?
Richard Steven, in his Advanced Unix programming book says that the daemon should do it, but the people who created the daemon say the Posix way is better.
Any takers?
Thanks in advance,
Kunal
 

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LEARN ABOUT OSF1

statd

rpc.statd(8)						      System Manager's Manual						      rpc.statd(8)

NAME

       rpc.statd, statd - Network status monitor daemon

SYNOPSIS

       /usr/sbin/rpc.statd [-c]

OPTIONS

       Available only on TruCluster Server systems. This option starts the clusterwide network status daemon, which helps provide highly available
       NFS service. Do not use -c directly. Highly available NFS service is configured by default and typically does not require intervention.	If
       you do need to start the clusterwide network status daemon, use the CAA command, caa_start cluster_lockd.

	      For more information, see the TruCluster Server Administration manual.

DESCRIPTION

       The  rpc.statd daemon monitors the status of the client and server sites in response to a request made by the local rpc.lockd daemon.  When
       a site failure is detected, the rpc.statd daemon notifies the local rpc.lockd daemon, which then processes the recovery of the locked files
       or file regions.

RESTRICTIONS

       The crash of a site is only detected on its recovery.

FILES

       A directory created by the statd daemon.  Each file name in the directory is the host name of a client or server that the statd daemon will
       notify upon its recovery.  A backup directory created by the statd daemon.  A file created by the statd daemon to store its state number.

SEE ALSO

       Daemons: rpc.lockd(8)

       Files: statmon(4)

																      rpc.statd(8)
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