[PATCH] Cygwin: pipe: Restore non-blocking mode which was reset for non-cygwin app.
Corinna Vinschen
corinna-cygwin@cygwin.com
Mon Mar 11 10:47:32 GMT 2024
Hi Takashi,
On Mar 10 19:31, Takashi Yano wrote:
> @@ -590,6 +591,10 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
> {
> fhandler_pipe *pipe = (fhandler_pipe *)(fhandler_base *) cfd;
> pipe->set_pipe_non_blocking (false);
> + pipew_duped = (fhandler_pipe *)
> + ccalloc (HEAP_FHANDLER, 1, sizeof (fhandler_pipe));
> + pipew_duped = new (pipew_duped) fhandler_pipe;
> + pipe->dup (pipew_duped, 0);
> if (pipe->request_close_query_hdl ())
> need_send_sig = true;
> }
The code setting up pipes and the dummy_tty is sufficiently complex,
so that I wonder if it shouldn't have
- its own methods and
- comments to describe why this stuff is necessary.
What about adding two methods, kind of like (the names are only
suggestion, albeit bad ones):
child_info_spawn::noncygwin_child_pre_fork()
to keep the above stuff together (plus comments) and
child_info_spawn::noncygwin_child_post_fork()
for the below code?
> @@ -597,6 +602,10 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
> {
> fhandler_pipe *pipe = (fhandler_pipe *)(fhandler_base *) cfd;
> pipe->set_pipe_non_blocking (false);
> + piper_duped = (fhandler_pipe *)
> + ccalloc (HEAP_FHANDLER, 1, sizeof (fhandler_pipe));
> + piper_duped = new (piper_duped) fhandler_pipe;
> + pipe->dup (piper_duped, 0);
> }
>
> if (need_send_sig)
> @@ -905,6 +914,19 @@ child_info_spawn::worker (const char *prog_arg, const char *const *argv,
> term_spawn_worker.cleanup ();
> term_spawn_worker.close_handle_set ();
> }
> + if (pipew_duped)
> + {
> + bool is_nonblocking = pipew_duped->is_nonblocking ();
> + pipew_duped->set_pipe_non_blocking (is_nonblocking);
Is that really right? You're asking pipew_duped for its
nonblocking flag and then set pipew_duped to the same value...?
> + pipew_duped->close ();
> + cfree (pipew_duped);
> + }
Thanks,
Corinna
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