Re: [LTP] [QUESTION] about test execve04 which testing for EMFILE

[Subrata Modak <subrata@linux.vnet.ibm.com>]

On Tue, 2009-05-26 at 17:44 +0800, Wei Yongjun wrote: 
> 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.

Lets remove then. Send a patch to do so.

Regards--
Subrata

> 
> 


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