topic socket file in Operating System - HP-UX

socket file

Brian Lee_4 — Fri, 11 Nov 2005 14:58:46 GMT

Does anyone know how to move/copy socket files to another file system?
Those socket files are under mqm directory.
I tried cp, mv, cpio and fbackup but none of them worked.

Re: socket file

Sandman! — Fri, 11 Nov 2005 15:28:09 GMT

Try stopping the process that's opened them. You can see what process has that file opened with lsof:

# lsof

regards!

Re: socket file

Brian Lee_4 — Fri, 11 Nov 2005 15:31:34 GMT

I already checked that none of process is holding those socket files.

Re: socket file

Sandman! — Fri, 11 Nov 2005 15:49:23 GMT

Have you tried copying them with dd?

Re: socket file

A. Clay Stephenson — Fri, 11 Nov 2005 15:59:29 GMT

This ain't gonna happen. You would have to write some C to create a socket and then bind() to the address (in this case, address would mean the path name).

Re: socket file

Brian Lee_4 — Fri, 11 Nov 2005 15:59:34 GMT

dd is also kind of copying so that it doesn't wokr ,either.
I am looking for a way to do image copy.

Re: socket file

Dave Hutton — Fri, 11 Nov 2005 16:06:40 GMT

May not be real relative to what you are asking. But I remember running into a socket file we tried over and over to move/copy/relocate from one place to another.

I think it was Netbackup 5.0 related. We finally gave up and just fired up the application in the new location which then created the socket file.
So in our case, we didn't really need to move/copy it.

So, you may not really need to copy it. It may just recreate itself once you start up the application.

Re: socket file

A. Clay Stephenson — Fri, 11 Nov 2005 16:11:44 GMT

You should also note that names associated with sockets are meaningless after connection is made and are often simply removed at that point. Yours may be a holdover from a dead process. Another peculiar aspect of these named sockets is that that can't be used to establish connections across machines --- which is the typical use of sockets.

Re: socket file

Ralph Grothe — Fri, 11 Nov 2005 19:02:22 GMT

I think there is no need to copy Unix Domain sockets because I think it's good programming style for applications that use this sort of IPC to remove the stale sockets after the close().
After the applications have been cleanly halted (i.e. definitely not by a SIGKILL) they should create new socket files on next startup.