From owner-freebsd-questions  Wed Nov 24  9:15:20 1999
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Date: Wed, 24 Nov 1999 17:09:07 +0000
From: Ben Smithurst <ben@scientia.demon.co.uk>
To: Peng HaiJie <phj@cn.FreeBSD.org>
Cc: freebsd-questions@freebsd.org
Subject: Re: Is a feature or a bug of nvi?
Message-ID: <19991124170907.B926@strontium.scientia.demon.co.uk>
References: <199911241204.MAA98904@cn.FreeBSD.org>
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Peng HaiJie wrote:

> /usr/bin/nvi will 
> 	:^\Quit - core-dumped 
> when I am in ex mode and press ^\ or ^$ in my home directory,
> but it won't core-dumped if I am not in home directory(such as in /).
> Is it a feature or a bug of nvi?

Well, it's nothing to do with nvi. If you aren't in a directory you have
write permission for, the kernel can't write a core file for you. Try it in
/tmp, you should find it can dump core there.

Try writing a simple program which just calls abort() - you will see it
exhibits the same behaviour.

=== begin code
#include <stdlib.h>

int
main(void) {
        abort();
        exit(EXIT_FAILURE);
}
=== end code

ben@strontium:~/tmp$ ./a.out
zsh: abort (core dumped)  ./a.out
ben@strontium:~/tmp$ cd /
ben@strontium:/$ ~/tmp/a.out
zsh: abort      /home/ben/tmp/a.out

-- 
Ben Smithurst            | PGP: 0x99392F7D
ben@scientia.demon.co.uk |   key available from keyservers and
                         |   ben+pgp@scientia.demon.co.uk


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