From boris@cs.tu-berlin.de  Thu Nov 14 05:59:22 2002
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Message-Id: <20021114135828.GB13558@fiesta.cs.tu-berlin.de>
Date: Thu, 14 Nov 2002 14:58:28 +0100
From: Boris Nikolaus <boris@cs.tu-berlin.de>
Reply-To: Boris Nikolaus <boris@cs.tu-berlin.de>
To: FreeBSD-gnats-submit@freebsd.org
Subject: kevent denies to observe /dev/tty
X-Send-Pr-Version: 3.113

>Number:         45293
>Category:       kern
>Synopsis:       [libc] kevent denies to observe /dev/tty
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Nov 14 06:00:04 PST 2002
>Closed-Date:    Sun May 16 10:53:52 UTC 2010
>Last-Modified:  Sun May 16 10:53:52 UTC 2010
>Originator:     Boris Nikolaus
>Release:        FreeBSD 4.7-STABLE i386
>Organization:
>Environment:
System: FreeBSD XXXXXX 4.7-STABLE FreeBSD 4.7-STABLE #43: Tue Oct 22 20:25:44 CEST 2002 root@XXXXXX:/usr/src/sys/compile/BORIS i386
>Description:
kevent(2) denies to observe /dev/tty, it returns EPERM when trying to add
an EVFILT_READ event for it. (Just for info: Using STDIN_FILENO works fine.)
>How-To-Repeat:
#include <sys/types.h>
#include <sys/event.h>
#include <sys/time.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>

int main() {
    int qfd;
    int ret;
    int fd;
    struct kevent kev[1];

    qfd = kqueue();

    fd = open("/dev/tty", O_RDWR);
    if (fd < 0)
	exit(1);
    EV_SET(&kev[0], fd, EVFILT_READ, EV_ADD, 0, 0, NULL);

    ret = kevent(qfd, kev, 1, NULL, 0, NULL);
    printf("kevent returned %d\n", ret);
    if (ret < 0)
        printf("errno = %d (%s)\n", errno, strerror(errno));

    close(qfd);

    return 0;
}
>Fix:
>Release-Note:
>Audit-Trail:

From: Jilles Tjoelker <jilles@stack.nl>
To: bug-followup@FreeBSD.org, boris@cs.tu-berlin.de
Cc:  
Subject: Re: kern/45293: [libc] kevent denies to observe /dev/tty
Date: Sat, 24 Oct 2009 21:03:58 +0200

 I cannot reproduce this problem on FreeBSD 6-stable, 7-stable or
 9-current. The program prints "kevent returned 0", succeeding in adding
 EVFILT_READ for /dev/tty.
 
 Is this still a problem for you?
 
 -- 
 Jilles Tjoelker
State-Changed-From-To: open->feedback 
State-Changed-By: jh 
State-Changed-When: Sun Apr 4 08:48:33 UTC 2010 
State-Changed-Why:  
Note that submitter has been asked for feedback. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=45293 
State-Changed-From-To: feedback->closed 
State-Changed-By: jh 
State-Changed-When: Sun May 16 10:53:51 UTC 2010 
State-Changed-Why:  
Feedback timeout. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=45293 
>Unformatted:
