Bug 31742
| Summary: | open("/dev/null", O_TRUNC) broken on -current | ||
|---|---|---|---|
| Product: | Base System | Reporter: | josb <josb> |
| Component: | kern | Assignee: | freebsd-bugs (Nobody) <bugs> |
| Status: | Closed FIXED | ||
| Severity: | Affects Only Me | ||
| Priority: | Normal | ||
| Version: | 5.0-CURRENT | ||
| Hardware: | Any | ||
| OS: | Any | ||
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 -------------------------------------------------------------- I was unable to reproduce this. Used the same code and:
root@rakahanga:(test)$ ls -dl /dev
drwxr-xr-x 4 root wheel 0 Nov 3 18:00 /dev
root@rakahanga:(test)$ ls -al /dev/null
crw-rw-rw- 1 root wheel 2, 2 Nov 3 21:29 /dev/null
root@rakahanga:(test)$
root@rakahanga:(test)$ ./devnull-perm 1
root@rakahanga:(test)$
uid=1000
andrewr@rakahanga:(test)$ ./devnull-perm 1
andrewr@rakahanga:(test)$
any thoughts?
Andrew
On 4 Nov 2001, Jos Backus wrote:
:
:>Number: 31742
:>Category: kern
:>Synopsis: open("/dev/null", O_TRUNC) broken on -current
:>Confidential: no
:>Severity: serious
:>Priority: high
:>Responsible: freebsd-bugs
:>State: open
:>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
arr@watson.org
arr@FreeBSD.org
I saw something like that a couple of days ago, but it works on my current box now. Is this on an up-to-date -current box ? Poul-Henning -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. On Sun, Nov 04, 2001 at 09:31:04AM +0100, Poul-Henning Kamp wrote: > I saw something like that a couple of days ago, but it works > on my current box now. Is this on an up-to-date -current box ? Yes. And updating to devfs_vnops.c 1.32 fixed the problem. Thanks again! -- Jos Backus _/ _/_/_/ Santa Clara, CA _/ _/ _/ _/ _/_/_/ _/ _/ _/ _/ josb@cncdsl.com _/_/ _/_/_/ use Std::Disclaimer; State Changed From-To: open->closed Already fixed. |
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%