From: "Bart Schaefer" <schaefer@candle.brasslantern.com>
To: Clint Adams <schizo@debian.org>
Cc: zsh-workers@sunsite.auc.dk
Subject: Re: Bad configure test for getpwent() ?
Date: Wed, 3 Nov 1999 20:14:14 +0000 [thread overview]
Message-ID: <991103201414.ZM21078@candle.brasslantern.com> (raw)
In-Reply-To: <19991103133904.A6549@dman.com>
On Nov 3, 1:39pm, Clint Adams wrote:
> Subject: Re: Bad configure test for getpwent() ?
> > pw1=getpwnam(buf);
> > sprintf(buf, "%d:%d", rand(), getpid());
> > pw2=getpwnam(buf);
> > exit(pw1!=0 && pw2!=0 && !strcmp(pw1->pw_name, pw2->pw_name));
>
> It's not comparing the pointers; it's comparing the names.
If pw1 == pw2, always, then strcmp(pw1->pw_name, pw2->pw_name) == 0, always.
> > I don't think getpwent() is required to return a unique pointer each time;
> > that is, I think it's allowed to re-use an internal static buffer for each
> > entry that it returns. That would mean that this test always succeeds ...
>-- End of excerpt from Clint Adams
prev parent reply other threads:[~1999-11-03 20:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
1999-11-03 10:34 Bart Schaefer
1999-11-03 18:39 ` Clint Adams
1999-11-03 19:58 ` Geoff Wing
1999-11-03 20:04 ` Clint Adams
1999-11-03 20:14 ` Bart Schaefer [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=991103201414.ZM21078@candle.brasslantern.com \
--to=schaefer@candle.brasslantern.com \
--cc=schizo@debian.org \
--cc=zsh-workers@sunsite.auc.dk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.vuxu.org/mirror/zsh/
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).