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SubjectRe: Question about leases
On Tue, 27 Aug 2002 03:06:16 +0200 Jan Hudec <> wrote:
> Please can anyone throw a bit light on file leases (fcntl F_SETLEASE
> command) or at least point me to some documentation? I can't find any.

There isn't any (except maybe the talk I gave at Linux Kongress
last year (

> As far as I figured out process holding a lease is notified when other
> process opens the leased file. But I am still not sure how the leases
> should then be released and how the process knows which lease was broken
> (struct siginfo does not seem to have union member for that case).

To release a lease, you use fcntl(fd, F_SETLEASE, F_UNLCK). The file
descriptor of the file that the lease is on is returned in the
siginfo structure.

Stephen Rothwell
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