From: Wei Yongjun <yjwei@cn.fujitsu.com>
To: subrata@linux.vnet.ibm.com
Cc: ltp-list@lists.sourceforge.net
Subject: Re: [LTP] [QUESTION] about test execve04 which testing for EMFILE
Date: Tue, 26 May 2009 17:44:22 +0800 [thread overview]
Message-ID: <4A1BB9F6.6050107@cn.fujitsu.com> (raw)
In-Reply-To: <1243268093.6752.24.camel@subratamodak.linux.ibm.com>
Subrata Modak wrote:
> On Fri, 2009-05-22 at 17:26 +0800, Wei Yongjun wrote:
>
>> recently kernel commit e7b9b550f53e81ea38e71d322d6f95730df058a2
>> has removed the file get code. The execve syscall will never
>> return EMFILE.
>>
>> Call to execve() will be suceess even if the the process has the
>> maximum number of files open, because execve() never open any file.
>>
>> Can anyone tell me what does this test case test for? It be wrote
>> base on which document? Just the man page?
>>
>
> * DESCRIPTION
> * Testcase to check execve(2) sets errno to EMFILE correctly
> *
> * ALGORITHM
> * Get the configured file descriptor table size. open(2) files to
> fill
> * up the file descriptor table. Once file descriptor table is full,
> * an attempt to execve(2) any other executable fails with EMFILE.
>
> is what the source description says. Can you please execute the test
> against that kernel commit and share the results with/without commits ?
>
Test without that commit:
# ./execve04 -F ./test3
execve04 1 PASS : Expected failure - 24 : Too many open files
Test with that commit:
# ./execve04 -F ./test3
<program name unknown>: error while loading shared libraries: libc.so.6:
cannot open shared object file: Error 24
execve04 1 FAIL :
execve(/home/weiyj/ltp/testcases/kernel/syscalls/execve/./test3) failed:
expected EMFILE(24), got 127 (Key has expired)
Test with that commit but I compiled test3 with --static:
# gcc test3.c -o test3 --static
# ./execve04 -F ./test3
Hello World
execve04 1 FAIL :
execve(/home/weiyj/ltp/testcases/kernel/syscalls/execve/./test3) failed:
expected EMFILE(24), got 0 (Success)
The latest kernel do execve(2) without get file descriptor, it only
need one file struct. It seem that this test is obsoleted.
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next prev parent reply other threads:[~2009-05-26 9:48 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-22 9:26 [LTP] [QUESTION] about test execve04 which testing for EMFILE Wei Yongjun
2009-05-25 16:14 ` Subrata Modak
2009-05-26 9:44 ` Wei Yongjun [this message]
2009-05-26 12:22 ` Subrata Modak
2009-05-27 3:48 ` Wei Yongjun
2009-05-27 14:23 ` Subrata Modak
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