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* [Bug libc/10609] New: openat (and *at friends) fail to detect ENOENT
@ 2009-09-05 16:26 ebb9 at byu dot net
2009-09-05 16:43 ` [Bug libc/10609] " ebb9 at byu dot net
2009-10-30 4:34 ` drepper at redhat dot com
0 siblings, 2 replies; 3+ messages in thread
From: ebb9 at byu dot net @ 2009-09-05 16:26 UTC (permalink / raw)
To: glibc-bugs
On older kernels, when __have_atfcts is false, the /proc/self/fd/%d/%s fallback
is used unconditionally, even when %s is the empty string. This ends up opening
fd (for openat), a successful stat of fd (for fstatat), etc, instead of failing
with ENOENT.
#include <fcntl.h>
int
main()
{
int fd = open (".", O_RDONLY);
if (openat (fd, "", O_RDONLY) != -1 || errno != ENOENT)
puts ("failed");
return 0;
}
--
Summary: openat (and *at friends) fail to detect ENOENT
Product: glibc
Version: 2.10
Status: NEW
Severity: normal
Priority: P2
Component: libc
AssignedTo: drepper at redhat dot com
ReportedBy: ebb9 at byu dot net
CC: glibc-bugs at sources dot redhat dot com
http://sourceware.org/bugzilla/show_bug.cgi?id=10609
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* [Bug libc/10609] openat (and *at friends) fail to detect ENOENT
2009-09-05 16:26 [Bug libc/10609] New: openat (and *at friends) fail to detect ENOENT ebb9 at byu dot net
@ 2009-09-05 16:43 ` ebb9 at byu dot net
2009-10-30 4:34 ` drepper at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: ebb9 at byu dot net @ 2009-09-05 16:43 UTC (permalink / raw)
To: glibc-bugs
------- Additional Comments From ebb9 at byu dot net 2009-09-05 16:43 -------
Created an attachment (id=4171)
--> (http://sourceware.org/bugzilla/attachment.cgi?id=4171&action=view)
Example patch for openat
This patch fixes the problem for openat, but all the other *at functions need
the same treatment.
--
http://sourceware.org/bugzilla/show_bug.cgi?id=10609
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* [Bug libc/10609] openat (and *at friends) fail to detect ENOENT
2009-09-05 16:26 [Bug libc/10609] New: openat (and *at friends) fail to detect ENOENT ebb9 at byu dot net
2009-09-05 16:43 ` [Bug libc/10609] " ebb9 at byu dot net
@ 2009-10-30 4:34 ` drepper at redhat dot com
1 sibling, 0 replies; 3+ messages in thread
From: drepper at redhat dot com @ 2009-10-30 4:34 UTC (permalink / raw)
To: glibc-bugs
------- Additional Comments From drepper at redhat dot com 2009-10-30 04:34 -------
I fixed it slightly different and more efficient.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
http://sourceware.org/bugzilla/show_bug.cgi?id=10609
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end of thread, other threads:[~2009-10-30 4:34 UTC | newest]
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2009-09-05 16:26 [Bug libc/10609] New: openat (and *at friends) fail to detect ENOENT ebb9 at byu dot net
2009-09-05 16:43 ` [Bug libc/10609] " ebb9 at byu dot net
2009-10-30 4:34 ` drepper at redhat dot com
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