spawnv() unlocks files in the calling program
Corinna Vinschen
corinna-cygwin@cygwin.com
Sun Feb 9 19:50:00 GMT 2014
On Feb 9 13:25, Steven Bardwell wrote:
> I have a simple programs that show the following issue:
>
> 1) program locks a file (in my test /tmp/yyy)
> 2) program then calls spawnv() (in my test "/bin/sh -c /bin/touch
> /tmp/xxx").
> 3) after the spawnv(), the file /tmp/yyy is no longer locked.
How do you test that? You're calling fcntl(F_SETLKW) exactly once at
the start of your test application, but never again later. We're
talking advisory file locking here, so, where's the next fcntl call
waiting for the lock?
I debugged your test app and the lock still exists after the spawn call.
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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