1 files changed, 75 insertions, 0 deletions
diff --git a/hurd/port2fd.c b/hurd/port2fd.c
new file mode 100644
index 0000000000..cad89e770f
--- /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);
+}