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Date:      Sat, 3 Nov 2001 20:30:01 -0800 (PST)
From:      "Andrew R. Reiter" <arr@FreeBSD.org>
To:        freebsd-bugs@FreeBSD.org
Subject:   Re: kern/31742: open("/dev/null", O_TRUNC) broken on -current
Message-ID:  <200111040430.fA44U1e50006@freefall.freebsd.org>

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The following reply was made to PR kern/31742; it has been noted by GNATS.

From: "Andrew R. Reiter" <arr@FreeBSD.org>
To: Jos@lizzy.bugworks.com,
	"Backus <@lizzy.bugworks.com Jos Backus" <josb@cncdsl.com>
Cc: FreeBSD-gnats-submit@FreeBSD.org
Subject: Re: kern/31742: open("/dev/null", O_TRUNC) broken on -current
Date: Sat, 3 Nov 2001 23:20:48 -0500 (EST)

 On 4 Nov 2001, Jos Backus wrote:
 :>Quarter:        
 :>Keywords:       
 :>Date-Required:
 :>Class:          sw-bug
 :>Submitter-Id:   current-users
 :>Arrival-Date:   Sat Nov 03 17:10:01 PST 2001
 :>Closed-Date:
 :>Last-Modified:
 :>Originator:     Jos Backus
 :>Release:        FreeBSD 5.0-CURRENT i386
 :>Organization:
 :none
 :>Environment:
 :System: FreeBSD lizzy.bugworks.com 5.0-CURRENT FreeBSD 5.0-CURRENT #17: Sat Nov 3 15:04:31 PST 2001 jos@lizzy.bugworks.com:/disk0/usr/obj/usr/src/sys/LIZZY i386
 :
 :lizzy:/tmp% ls -ld /dev
 :dr-xr-xr-x  4 root  wheel  0 Nov  3 07:15 /dev
 :lizzy:/tmp% ls -l /dev/null 
 :crw-rw-rw-  1 root  wheel    2,   2 Nov  3 17:04 /dev/null
 :lizzy:/tmp% 
 :
 :>Description:
 :
 :    open("/dev/null", O_TRUNC) fails with EPERM.
 :
 :>How-To-Repeat:
 :
 :lizzy:/tmp% cat c.c
 :#include <stdio.h>
 :#include <fcntl.h>
 :
 :int
 :main(int argc, char *argv[])
 :{
 :    char *s = "string";
 :    int fd;
 :    int flag = 0;
 :
 :    if (argc > 1) flag = O_TRUNC;
 :    if ((fd = open("/dev/null", O_CREAT|O_WRONLY|flag)) == -1)
 :        err(1, "open");
 :    write(fd, s, strlen(s));
 :    close(fd);
 :    exit(0);
 :}
 :lizzy:/tmp% make c
 :cc -O -pipe -march=pentiumpro     c.c  -o c
 :lizzy:/tmp% ./c
 :lizzy:/tmp% ./c 1
 :c: open: Operation not permitted
 :lizzy:/tmp% 
 :
 :>Fix:
 :>Release-Note:
 :>Audit-Trail:
 :>Unformatted:
 :
 :To Unsubscribe: send mail to majordomo@FreeBSD.org
 :with "unsubscribe freebsd-bugs" in the body of the message
 :
 
 --------------------------------------------------------------
 Andrew R. Reiter	"Nothing shocks me.  I'm a scientist."
 arr@watson.org			- Indiana Jones
 arr@FreeBSD.org
 --------------------------------------------------------------
 
 

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