mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-18 11:00:07 +00:00
1d67062e53
* sysdeps/mach/hurd/ioctl.c (__ioctl): Move the marshalling of the arguments into the request message buffer inside `send_rpc' subfunction. We must repeat the marshalling when retrying the RPC after a SIGTTOU delivery. * hurd/ctty-input.c (_hurd_ctty_input): Use early short-circuit code path when there is no ctty port. * hurd/ctty-output.c (_hurd_ctty_output): Likewise. Move sigstate check inside loop so we recheck after handling a signal.
81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
/* _hurd_ctty_input -- Do an input RPC and generate SIGTTIN if necessary.
|
|
Copyright (C) 1995,97,99 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <hurd.h>
|
|
#include <hurd/signal.h>
|
|
|
|
/* Call *RPC on PORT and/or CTTY. If a call on CTTY returns EBACKGROUND,
|
|
generate SIGTTIN or EIO as appropriate. */
|
|
|
|
error_t
|
|
_hurd_ctty_input (io_t port, io_t ctty, error_t (*rpc) (io_t))
|
|
{
|
|
error_t err;
|
|
|
|
if (ctty == MACH_PORT_NULL)
|
|
return (*rpc) (port);
|
|
|
|
do
|
|
{
|
|
err = (*rpc) (ctty);
|
|
if (err == EBACKGROUND)
|
|
{
|
|
/* We are a background job and tried to read from the tty.
|
|
We should probably get a SIGTTIN signal. */
|
|
if (_hurd_orphaned)
|
|
/* Our process group is orphaned. Don't stop; just fail. */
|
|
err = EIO;
|
|
else
|
|
{
|
|
struct hurd_sigstate *ss = _hurd_self_sigstate ();
|
|
__spin_lock (&ss->lock);
|
|
if (__sigismember (&ss->blocked, SIGTTIN) ||
|
|
ss->actions[SIGTTIN].sa_handler == SIG_IGN)
|
|
/* We are blocking or ignoring SIGTTIN. Just fail. */
|
|
err = EIO;
|
|
__spin_unlock (&ss->lock);
|
|
|
|
if (err == EBACKGROUND)
|
|
{
|
|
/* Send a SIGTTIN signal to our process group.
|
|
|
|
We must remember here not to clobber ERR, since
|
|
the loop condition below uses it to recall that
|
|
we should retry after a stop. */
|
|
|
|
__USEPORT (CTTYID, _hurd_sig_post (0, SIGTTIN, port));
|
|
/* XXX what to do if error here? */
|
|
|
|
/* At this point we should have just run the handler for
|
|
SIGTTIN or resumed after being stopped. Now this is
|
|
still a "system call", so check to see if we should
|
|
restart it. */
|
|
__spin_lock (&ss->lock);
|
|
if (!(ss->actions[SIGTTIN].sa_flags & SA_RESTART))
|
|
err = EINTR;
|
|
__spin_unlock (&ss->lock);
|
|
}
|
|
}
|
|
}
|
|
/* If the last RPC generated a SIGTTIN, loop to try it again. */
|
|
} while (err == EBACKGROUND);
|
|
|
|
return err;
|
|
}
|