From owner-freebsd-bugs  Sun May 24 08:05:10 1998
Return-Path: <owner-freebsd-bugs@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id IAA27772
          for freebsd-bugs-outgoing; Sun, 24 May 1998 08:05:10 -0700 (PDT)
          (envelope-from owner-freebsd-bugs@FreeBSD.ORG)
Received: from freefall.freebsd.org (freefall.FreeBSD.ORG [204.216.27.21])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id IAA27765
          for <freebsd-bugs@FreeBSD.org>; Sun, 24 May 1998 08:05:08 -0700 (PDT)
          (envelope-from gnats@FreeBSD.org)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.8.8/8.8.5) id IAA25034;
	Sun, 24 May 1998 08:00:01 -0700 (PDT)
Received: from relay.ucb.crimea.ua (relay.ucb.crimea.ua [194.93.177.113])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id IAA27454
          for <FreeBSD-gnats-submit@freebsd.org>; Sun, 24 May 1998 08:01:32 -0700 (PDT)
          (envelope-from ru@ucb.crimea.ua)
Received: (from ru@localhost)
	by relay.ucb.crimea.ua (8.8.8/8.8.8) id SAA09939;
	Sun, 24 May 1998 18:01:18 +0300 (EEST)
	(envelope-from ru)
Message-Id: <199805241501.SAA09939@relay.ucb.crimea.ua>
Date: Sun, 24 May 1998 18:01:18 +0300 (EEST)
From: Ruslan Ermilov <ru@ucb.crimea.ua>
Reply-To: ru@ucb.crimea.ua
To: FreeBSD-gnats-submit@FreeBSD.ORG
X-Send-Pr-Version: 3.2
Subject: bin/6741: libc: printf() causes errno is set to 2
Sender: owner-freebsd-bugs@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.org


>Number:         6741
>Category:       bin
>Synopsis:       libc: printf() causes errno is set to 2
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:
>Keywords:
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun May 24 08:00:01 PDT 1998
>Last-Modified:
>Originator:     Ruslan Ermilov
>Organization:
United Commercial Bank
>Release:        FreeBSD 2.2.6-STABLE i386
>Environment:

	Fresh FreeBSD 2.2.6-STABLE,
	Standard non-threaded C library.

>Description:

	Using printf(), fprintf(stdout, ...) causes global
	variable errno set to 2.
	This is only true for standard non-threaded library.
	Threaded library calls do not change errno.

>How-To-Repeat:

Try the following:
1. with standard, non-threada libc
2. with threaded library (libc_r)
3. change printf -> fprintf(stdout), then to fprintf(stderr).

#include <sys/errno.h>
#include <stdio.h>

void main(void)
{
	printf("errno=%d\n", errno);
	printf("errno=%d\n", errno);
}

>Fix:
	
	Sorry, not available yet.
>Audit-Trail:
>Unformatted:

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message