Re: File Test

Under UN*X? No. The big function would be making queries to either the FS or the kernel, depending on the OS.

Under MacOS? No problem. See Mac::MoreFiles. A function already exists to do that. (MacOS supports mandatoy file locking.)

Under AFS (AtheOS)? Node watching is supported and encouraged (cool stuff).

Under NFS? Too much chance for race conditions- no way.

Under VMS? I don't know.

Under Win32? I don't care.

If you come a across a situation where you need to know if a file is currently being used without some form of IPC, you're in bad shape- this is indicative of a poor design.

AgentM Systems nor Nasca Enterprises nor Bone::Easy nor Macperl is responsible for the comments made by AgentM. Remember, you can build any logical system with NOR.

Comment on Re: File Test

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Re: Re: File Test by Anonymous Monk on Apr 05, 2001 at 22:58 UTC
Under UNIX, you could parse the output of the lsof program (if available).	[reply]
Re: Re: Re: File Test by extremely (Priest) on Apr 06, 2001 at 00:12 UTC
What happens when someone else starts reading the file while you are parsing `lsof`'s output? Or stops reading it, for that matter. -- $you = new YOU; honk() if $you->love(perl)	[reply]