Date: Sat, 15 Sep 2001 10:47:23 +0300
From: "Eli Zaretskii" <eliz AT is DOT elta DOT co DOT il>
Sender: halo1 AT zahav DOT net DOT il
To: Paula Sanchez <psanchez AT cs DOT montana DOT edu>
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CC: djgpp AT delorie DOT com
In-reply-to: <Pine.OSF.4.21.0109141213110.29068-100000@esus.cs.montana.edu>
	(message from Paula Sanchez on Fri, 14 Sep 2001 12:27:46 -0600)
Subject: Re: fcntl
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> From: Paula Sanchez <psanchez AT cs DOT montana DOT edu>
> Newsgroups: comp.os.msdos.djgpp
> Date: Fri, 14 Sep 2001 12:27:46 -0600
> 
> I started using DJGPP this week. I am trying to block, unblock and check
> the lock in a file with the function fcntl.
> 
> I am booting DOS version Windows 95 4.00.1111 and using the DOS DJGPP GCC
> 2.953.
> 
> It is defined in libc and I assumed that is linked by default.
> 
> I am getting this error for any of the tries of locking, unlocking and
> checking the lock:
> Error locking: Function not implemented (ENOSYS)

F_GETLK and F_SETLK commands for `fcntl' are clearly documented in the
library reference to always fail in DJGPP v2.03.  That's what ENOSYS
is trying to tell you.

The code to support these commands was added to the current
development sources, but the latest released version doesn't have it.

For now, you can use `lock'/`unlock' or `_dos_lock'/`_dos_unlock'
functions to get the same functionality.