1 files changed, 331 insertions, 0 deletions
diff --git a/REORG.TODO/hurd/hurdioctl.c b/REORG.TODO/hurd/hurdioctl.c
new file mode 100644
index 0000000000..73ec3ea3cc
--- /dev/null
+++ b/REORG.TODO/hurd/hurdioctl.c
@@ -0,0 +1,331 @@
+/* ioctl commands which must be done in the C library.
+   Copyright (C) 1994-2017 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <hurd.h>
+#include <hurd/fd.h>
+#include <sys/ioctl.h>
+#include <hurd/ioctl.h>
+#include <string.h>
+
+
+/* Symbol set of ioctl handler lists.  If there are user-registered
+   handlers, one of these lists will contain them.  The other lists are
+   handlers built into the library.  */
+symbol_set_define (_hurd_ioctl_handler_lists)
+
+/* Look up REQUEST in the set of handlers.  */
+ioctl_handler_t
+_hurd_lookup_ioctl_handler (int request)
+{
+  void *const *ptr;
+  const struct ioctl_handler *h;
+
+  /* Mask off the type bits, so that we see requests in a single group as a
+     contiguous block of values.  */
+  request = _IOC_NOTYPE (request);
+
+  for (ptr = symbol_set_first_element (_hurd_ioctl_handler_lists);
+       !symbol_set_end_p (_hurd_ioctl_handler_lists, ptr);
+       ++ptr)
+    for (h = *ptr; h != NULL; h = h->next)
+      if (request >= h->first_request && request <= h->last_request)
+	return h->handler;
+
+  return NULL;
+}
+
+#include <fcntl.h>
+
+/* Find out how many bytes may be read from FD without blocking.  */
+
+static int
+fioctl (int fd,
+	int request,
+	int *arg)
+{
+  error_t err;
+
+  *(volatile int *) arg = *arg;
+
+  switch (request)
+    {
+    default:
+      err = ENOTTY;
+      break;
+
+    case FIONREAD:
+      {
+	mach_msg_type_number_t navail;
+	err = HURD_DPORT_USE (fd, __io_readable (port, &navail));
+	if (!err)
+	  *arg = (int) navail;
+      }
+      break;
+
+    case FIONBIO:
+      err = HURD_DPORT_USE (fd, (*arg ?
+				 __io_set_some_openmodes :
+				 __io_clear_some_openmodes)
+			    (port, O_NONBLOCK));
+      break;
+
+    case FIOASYNC:
+      err = HURD_DPORT_USE (fd, (*arg ?
+				 __io_set_some_openmodes :
+				 __io_clear_some_openmodes)
+			    (port, O_ASYNC));
+      break;
+
+    case FIOSETOWN:
+      err = HURD_DPORT_USE (fd, __io_mod_owner (port, *arg));
+      break;
+
+    case FIOGETOWN:
+      err = HURD_DPORT_USE (fd, __io_get_owner (port, arg));
+      break;
+    }
+
+  return err ? __hurd_dfail (fd, err) : 0;
+}
+
+_HURD_HANDLE_IOCTLS (fioctl, FIOGETOWN, FIONREAD);
+
+
+static int
+fioclex (int fd,
+	 int request)
+{
+  int flag;
+
+  switch (request)
+    {
+    default:
+      return __hurd_fail (ENOTTY);
+    case FIOCLEX:
+      flag = FD_CLOEXEC;
+      break;
+    case FIONCLEX:
+      flag = 0;
+      break;
+    }
+
+  return __fcntl (fd, F_SETFD, flag);
+}
+_HURD_HANDLE_IOCTLS (fioclex, FIOCLEX, FIONCLEX);
+
+#include <hurd/term.h>
+#include <hurd/tioctl.h>
+
+/* Install a new CTTYID port, atomically updating the dtable appropriately.
+   This consumes the send right passed in.  */
+
+void
+_hurd_locked_install_cttyid (mach_port_t cttyid)
+{
+  mach_port_t old;
+  struct hurd_port *const port = &_hurd_ports[INIT_PORT_CTTYID];
+  struct hurd_userlink ulink;
+  int i;
+
+  /* Install the new cttyid port, and preserve it with a ulink.
+     We unroll the _hurd_port_set + _hurd_port_get here so that
+     there is no window where the cell is unlocked and CTTYID could
+     be changed by another thread.  (We also delay the deallocation
+     of the old port until the end, to minimize the duration of the
+     critical section.)
+
+     It is important that changing the cttyid port is only ever done by
+     holding the dtable lock continuously while updating the port cell and
+     re-ctty'ing the dtable; dtable.c assumes we do this.  Otherwise, the
+     pgrp-change notification code in dtable.c has to worry about racing
+     against us here in odd situations.  The one exception to this is
+     setsid, which holds the dtable lock while changing the pgrp and
+     clearing the cttyid port, and then unlocks the dtable lock to allow
+
+
+  */
+
+  __spin_lock (&port->lock);
+  old = _hurd_userlink_clear (&port->users) ? port->port : MACH_PORT_NULL;
+  port->port = cttyid;
+  cttyid = _hurd_port_locked_get (port, &ulink);
+
+  for (i = 0; i < _hurd_dtablesize; ++i)
+    {
+      struct hurd_fd *const d = _hurd_dtable[i];
+      mach_port_t newctty = MACH_PORT_NULL;
+
+      if (d == NULL)
+	/* Nothing to do for an unused descriptor cell.  */
+	continue;
+
+      if (cttyid != MACH_PORT_NULL)
+	/* We do have some controlling tty.  */
+	HURD_PORT_USE (&d->port,
+		       ({ mach_port_t id;
+			  /* Get the io object's cttyid port.  */
+			  if (! __term_getctty (port, &id))
+			    {
+			      if (id == cttyid /* Is it ours?  */
+				  /* Get the ctty io port.  */
+				  && __term_open_ctty (port,
+						       _hurd_pid, _hurd_pgrp,
+						       &newctty))
+				/* XXX it is our ctty but the call failed? */
+				newctty = MACH_PORT_NULL;
+			      __mach_port_deallocate (__mach_task_self (), id);
+			    }
+			  0;
+			}));
+
+      /* Install the new ctty port.  */
+      _hurd_port_set (&d->ctty, newctty);
+    }
+
+  __mutex_unlock (&_hurd_dtable_lock);
+
+  if (old != MACH_PORT_NULL)
+    __mach_port_deallocate (__mach_task_self (), old);
+  _hurd_port_free (port, &ulink, cttyid);
+}
+
+static void
+install_ctty (mach_port_t cttyid)
+{
+  HURD_CRITICAL_BEGIN;
+  __mutex_lock (&_hurd_dtable_lock);
+  _hurd_locked_install_cttyid (cttyid);
+  HURD_CRITICAL_END;
+}
+
+
+/* Called when we have received a message saying to use a new ctty ID port.  */
+
+error_t
+_hurd_setcttyid (mach_port_t cttyid)
+{
+  error_t err;
+
+  if (cttyid != MACH_PORT_NULL)
+    {
+      /* Give the new send right a user reference.
+	 This is a good way to check that it is valid.  */
+      if (err = __mach_port_mod_refs (__mach_task_self (), cttyid,
+				      MACH_PORT_RIGHT_SEND, 1))
+	return err;
+    }
+
+  /* Install the port, consuming the reference we just created.  */
+  install_ctty (cttyid);
+
+  return 0;
+}
+
+
+static inline error_t
+do_tiocsctty (io_t port, io_t ctty)
+{
+  mach_port_t cttyid;
+  error_t err;
+
+  if (ctty != MACH_PORT_NULL)
+    /* PORT is already the ctty.  Nothing to do.  */
+    return 0;
+
+  /* Get PORT's cttyid port.  */
+  err = __term_getctty (port, &cttyid);
+  if (err)
+    return err;
+
+  /* Change the terminal's pgrp to ours.  */
+  err = __tioctl_tiocspgrp (port, _hurd_pgrp);
+  if (err)
+    __mach_port_deallocate (__mach_task_self (), cttyid);
+  else
+    /* Make it our own.  */
+    install_ctty (cttyid);
+
+  return err;
+}
+
+/* Make FD be the controlling terminal.
+   This function is called for `ioctl (fd, TCIOSCTTY)'.  */
+
+static int
+tiocsctty (int fd,
+	   int request)		/* Always TIOCSCTTY.  */
+{
+  return __hurd_fail (HURD_DPORT_USE (fd, do_tiocsctty (port, ctty)));
+}
+_HURD_HANDLE_IOCTL (tiocsctty, TIOCSCTTY);
+
+/* Dissociate from the controlling terminal.  */
+
+static int
+tiocnotty (int fd,
+	   int request)		/* Always TIOCNOTTY.  */
+{
+  mach_port_t fd_cttyid;
+  error_t err;
+
+  if (err = HURD_DPORT_USE (fd, __term_getctty (port, &fd_cttyid)))
+    return __hurd_fail (err);
+
+  if (__USEPORT (CTTYID, port != fd_cttyid))
+    err = EINVAL;
+
+  __mach_port_deallocate (__mach_task_self (), fd_cttyid);
+
+  if (err)
+    return __hurd_fail (err);
+
+  /* Clear our cttyid port.  */
+  install_ctty (MACH_PORT_NULL);
+
+  return 0;
+}
+_HURD_HANDLE_IOCTL (tiocnotty, TIOCNOTTY);
+
+#include <hurd/pfinet.h>
+#include <net/if.h>
+#include <netinet/in.h>
+
+/* Fill in the buffer IFC->IFC_BUF of length IFC->IFC_LEN with a list
+   of ifr structures, one for each network interface.  */
+static int
+siocgifconf (int fd, int request, struct ifconf *ifc)
+{
+  error_t err;
+  size_t data_len = ifc->ifc_len;
+  char *data = ifc->ifc_buf;
+
+  if (data_len <= 0)
+    return 0;
+
+  err = HURD_DPORT_USE (fd, __pfinet_siocgifconf (port, ifc->ifc_len,
+						  &data, &data_len));
+  if (data_len < ifc->ifc_len)
+    ifc->ifc_len = data_len;
+  if (data != ifc->ifc_buf)
+    {
+      memcpy (ifc->ifc_buf, data, ifc->ifc_len);
+      __vm_deallocate (__mach_task_self (), (vm_address_t) data, data_len);
+    }
+  return err ? __hurd_dfail (fd, err) : 0;
+}
+_HURD_HANDLE_IOCTL (siocgifconf, SIOCGIFCONF);