Need inforamtion on execve(2) on ENOMEM

Need inforamtion on execve(2) on ENOMEM

[Halesh S]

Hi,

I need a bit information regarding execve(2) sys call failure on no memory.

when execve(2) exits with ENOMEM, it will fail to return back to the calling 
program as it receives the SIGKILL from the kernel.

Is it a right behavior that execve() will not return to calling 
program on ENOMEM. As I understood execve(2) will not return only on success.

As errno will be lost, its very diffcult to judge execve(2) status.

If not expected behaviour,  I can provide a testcase for this.

Please let me about this.

Thanks,
Halesh

Re: Need inforamtion on execve(2) on ENOMEM

[Peter Zijlstra]

On Fri, 2008-08-01 at 13:30 +0000, Halesh S wrote:
> Hi,
> 
> I need a bit information regarding execve(2) sys call failure on no memory.
> 
> when execve(2) exits with ENOMEM, it will fail to return back to the calling 
> program as it receives the SIGKILL from the kernel.
> 
> Is it a right behavior that execve() will not return to calling 
> program on ENOMEM. As I understood execve(2) will not return only on success.
> 
> As errno will be lost, its very diffcult to judge execve(2) status.
> 
> If not expected behaviour,  I can provide a testcase for this.
> 
> Please let me about this.

It only does the SIGKILL bit when it runs out of memory after the old
programm is dead and the new programm isn't quite running yet.

So there is no calling programm to return to.