RE: your mail

Bloch, Jack
2003-12-03T16:19:59Z

Thanks,

I found the problem. I do have errno.h included. I was doing a read of errno
after calling perror. If I read it directly after getting the neagtive 0ne
back, it contains the right value.

Jack Bloch
Siemens ICN
phone (561) 923-6550
e-mail jack.bloch@icn.siemens.com

-----Original Message-----
From: Linus Torvalds [mailto:torvalds@osdl.org]
Sent: Wednesday, December 03, 2003 11:04 AM
To: Bloch, Jack
Cc: linux-kernel@vger.kernel.org
Subject: Re: your mail

On Wed, 3 Dec 2003, Bloch, Jack wrote:
>
> I try to open a non-existan device driver node file. The Kernel returns a
> value of -1 (expected). However, when I read the value of errno it
contains
> a value of 29. A call to the perror functrion does print out the correct
> error message (a value of 2). Why does this happen?

Because you forgot a "#include <errno.h>"? Or you have something else
wrong in your program that makes "errno" mean the wrong thing?

Linus