[PATCH] BZ #14782 system async cancellation
Rich Felker
dalias@aerifal.cx
Thu Nov 1 12:19:00 GMT 2012
On Thu, Nov 01, 2012 at 08:31:02AM +0100, Andreas Schwab wrote:
> Rich Felker <dalias@aerifal.cx> writes:
>
> > -/* We have to and actually can handle cancelable system(). The big
> > - problem: we have to kill the child process if necessary. To do
> > - this a cleanup handler has to be registered and is has to be able
> > - to find the PID of the child. The main problem is to reliable have
> > - the PID when needed. It is not necessary for the parent thread to
> > - return. It might still be in the kernel when the cancellation
> > - request comes. Therefore we have to use the clone() calls ability
> > - to have the kernel write the PID into the user-level variable. */
> > -#ifndef FORK
> > -# define FORK() \
> > - INLINE_SYSCALL (clone, 3, CLONE_PARENT_SETTID | SIGCHLD, 0, &pid)
> > -#endif
>
> What about the other uses?
Please clarify. Did I miss something?
Rich
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