Sender: nate AT cartsys DOT com
Message-ID: <374B1D12.7C97777E@cartsys.com>
Date: Tue, 25 May 1999 14:58:42 -0700
From: Nate Eldredge <nate AT cartsys DOT com>
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To: djgpp AT delorie DOT com
Subject: Re: srand() or time()
References: <l03130304b36f36eea8f5@[145.98.116.154]>
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Reply-To: djgpp AT delorie DOT com

Dlanor Blytkerchan wrote:
> 
> Hi all!
> 
> Here's a weird little fact (not a real problem, but weird notheless):
> The following code results in an error:
> 
> #include <time.h>
> #include <stdlib.h>
> 
> int main(void) {
>   srand(time(0));
>   return(0);
> } // main()
> 
> When stepping through this in RHIDE, watching errno like a hawk, immediatly
> after srand(time(0)); errno is set to 22 (ENOENT) (and thus causes my
> program to believe there's an error, which it wisely ignores).
> Is there anything I'm missing here, or is this just some weird frill in the
> RNG or the time()?

It shouldn't happen, AFAIK.  But I think I may know why it does.

* What DJGPP version is this?
* Do you have the timezone files installed (what is in your zoneinfo/
directory)?

Try finding out exactly where it is changing.  In GDB, you might set a
watchpoint.  E.g.

gcc -g -o foo.exe foo.c
gdb foo.exe
break main
run
watch errno
c
bt

and send back what it prints.

-- 

Nate Eldredge
nate AT cartsys DOT com