NetBSD Problem Report #1808

From gnats  Sun Dec  3 19:42:55 1995
Received: from khym.imf.unit.no by pain.lcs.mit.edu (8.6.12/8.6.9) with ESMTP id TAA04755 for <gnats-bugs@gnats.netbsd.org>; Sun, 3 Dec 1995 19:40:36 -0500
Message-Id: <199512040040.BAA26641@leon.imf.unit.no>
Date: Mon, 4 Dec 1995 01:40:27 +0100
From: Arne Henrik Juul <arnej@imf.unit.no>
Reply-To: arnej@imf.unit.no
To: gnats-bugs@gnats.netbsd.org
Subject: lseek errors get bogus return value
X-Send-Pr-Version: 3.95

>Number:         1808
>Category:       port-vax
>Synopsis:       lseek errors get bogus return value
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    ragge
>State:          closed
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Dec 03 19:50:02 +0000 1995
>Closed-Date:    Wed Feb 21 16:02:40 +0000 1996
>Last-Modified:  Wed Feb 21 16:23:55 +0000 1996
>Originator:     Arne H. Juul
>Release:        1.1
>Organization:
	Norwegian University of Technology and Science (NUTS)
>Environment:

System: NetBSD dvask.pvv.unit.no 1.1 NetBSD 1.1 (GENERIC) #1: Fri Dec  1 22:45:28 MET 1995     arnej@dvask.pvv.unit.no:/usr/src/sys/arch/vax/compile/GENERIC vax



>Description:
	When lseek fails, only half the result of (long long)-1 is returned.
This means that programs testing the return value from lseek will fail.
>How-To-Repeat:
	Run this test program from with "echo foobar | a.out":
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>

int main(void)
{
  off_t offset;

  offset = lseek(0, (off_t)64, 0);
  printf("offset %qd\n", offset);
}
>Fix:
	Apply this patch to /usr/src/lib/libc/arch/vax/sys/cerror.S:
--- cerror.S.orig	Wed Oct 11 13:00:02 1995
+++ cerror.S	Mon Dec  4 01:27:04 1995
@@ -41,5 +41,5 @@
 	.globl	_errno
 cerror:
 	movl	r0,_errno
-	mnegl	$1,r0
+	movq	$0xffffffffffffffff,r0
 	ret
>Release-Note:
>Audit-Trail:

Responsible-Changed-From-To: gnats-admin->gnats-admin
Responsible-Changed-By: jtc
Responsible-Changed-When: Thu Feb  1 12:02:27 1996
Responsible-Changed-Why:
Refiled to port-vax.

State-Changed-From-To: open->closed 
State-Changed-By: ragge 
State-Changed-When: Wed Feb 21 11:02:40 EST 1996 
State-Changed-Why:  
The fix is implemented and works. 


Responsible-Changed-From-To: gnats-admin->ragge 
Responsible-Changed-By: ragge 
Responsible-Changed-When: Wed Feb 21 11:02:40 EST 1996 
Responsible-Changed-Why:  
Concerning vax port. 
>Unformatted:

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