Re: How to detect if file is in use?

A lot depends on what is producing the log file. Is using file test operators or stat() a possibility? If the last modification date on a log file is over a threshold value, can you assume the process has stopped writing to it?

A trick I used to use with Oracle log files was to rename the file while it was still open. You could then work on it.

Good luck!
Kathy

Comment on Re: How to detect if file is in use?

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Re^2: How to detect if file is in use? by blazar (Canon) on Mar 17, 2005 at 15:51 UTC
A lot depends on what is producing the log file. Is using file test operators or stat() a possibility? If the last modification date on a log file is over a threshold value, can you assume the process has stopped writing to it? Actually we've been thinking about this ourselves, and despite what I wrote in the first node of this thread, I suppose that eventually we'll either use that or run fuser externally rather than processing /proc ourselves (or we'll check if Linux::Fuser works with current kernels -I suppose so, BTW- and if so, then use that instead).	[reply]
Re^3: How to detect if file is in use? by gellyfish (Monsignor) on Mar 17, 2005 at 15:57 UTC
or we'll check if Linux::Fuser works with current kernels It definitely works on x86 2.6 Linux kernels but if you have a problem with it drop me a line indicating the kernel version and CPU architecture and I'll fix it Update: I have just uploaded a new version of Linux::Fuser which includes an example program and is more explicit in the README about what kernel versions it is known to work with. /J\	[reply]