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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /hurd/port2fd.c
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initial import
Diffstat (limited to 'hurd/port2fd.c')
-rw-r--r--hurd/port2fd.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/hurd/port2fd.c b/hurd/port2fd.c
new file mode 100644
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--- /dev/null
+++ b/hurd/port2fd.c
@@ -0,0 +1,75 @@
+/* Copyright (C) 1994 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., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <hurd.h>
+#include <hurd/fd.h>
+#include <hurd/signal.h>
+#include <hurd/term.h>
+#include <fcntl.h>
+
+/* Store PORT in file descriptor D, doing appropriate ctty magic.
+ FLAGS are as for `open'; only O_IGNORE_CTTY is meaningful.
+ D should be locked, and will not be unlocked. */
+
+void
+_hurd_port2fd (struct hurd_fd *d, io_t port, int flags)
+{
+ io_t ctty;
+ mach_port_t cttyid;
+ int is_ctty = !(flags & O_IGNORE_CTTY) && ! __term_getctty (port, &cttyid);
+
+ if (is_ctty)
+ {
+ /* This port is capable of being a controlling tty.
+ Is it ours? */
+ struct hurd_port *const id = &_hurd_ports[INIT_PORT_CTTYID];
+ __spin_lock (&id->lock);
+ if (id->port == MACH_PORT_NULL)
+ /* We have no controlling tty, so make this one it. */
+ _hurd_port_locked_set (id, cttyid);
+ else
+ {
+ if (cttyid != id->port)
+ /* We have a controlling tty and this is not it. */
+ is_ctty = 0;
+ /* Either we don't want CTTYID, or ID->port already is it.
+ So we don't need to change ID->port, and we can release
+ the reference to CTTYID. */
+ __spin_unlock (&id->lock);
+ __mach_port_deallocate (__mach_task_self (), cttyid);
+ }
+ }
+
+ if (!is_ctty || __term_open_ctty (port, _hurd_pid, _hurd_pgrp, &ctty) != 0)
+ /* XXX if IS_CTTY, then this port is our ctty, but we are
+ not doing ctty style i/o because term_become_ctty barfed.
+ What to do? */
+ /* No ctty magic happening here. */
+ ctty = MACH_PORT_NULL;
+
+ /* Install PORT in the descriptor cell, leaving it locked. */
+ {
+ mach_port_t old
+ = _hurd_userlink_clear (&d->port.users) ? d->port.port : MACH_PORT_NULL;
+ d->port.port = port;
+ if (old != MACH_PORT_NULL)
+ __mach_port_deallocate (__mach_task_self (), old);
+ }
+
+ _hurd_port_set (&d->ctty, ctty);
+}