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-rw-r--r--hurd/hurdioctl.c264
1 files changed, 264 insertions, 0 deletions
diff --git a/hurd/hurdioctl.c b/hurd/hurdioctl.c
new file mode 100644
index 0000000..5a41eb1
--- /dev/null
+++ b/hurd/hurdioctl.c
@@ -0,0 +1,264 @@
+/* ioctl commands which must be done in the C library.
+Copyright (C) 1994, 1995 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 <sys/ioctl.h>
+#include <hurd/ioctl.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;
+
+ 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 = EGRATUITOUS;
+ 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_fail (err) : 0;
+}
+
+_HURD_HANDLE_IOCTLS (fioctl, FIOGETOWN, FIONREAD);
+
+
+static int
+fioclex (int fd,
+ int request)
+{
+ int flag;
+
+ switch (request)
+ {
+ default:
+ return __hurd_fail (EGRATUITOUS);
+ 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>
+
+static void
+rectty_dtable (mach_port_t cttyid)
+{
+ int i;
+
+ HURD_CRITICAL_BEGIN;
+ __mutex_lock (&_hurd_dtable_lock);
+
+ for (i = 0; i < _hurd_dtablesize; ++i)
+ {
+ struct hurd_fd *const d = _hurd_dtable[i];
+ mach_port_t newctty;
+
+ if (d == NULL)
+ /* Nothing to do for an unused descriptor cell. */
+ continue;
+
+ if (cttyid == MACH_PORT_NULL)
+ /* We now have no controlling tty at all. */
+ newctty = MACH_PORT_NULL;
+ else
+ 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 (), (mach_port_t) id);
+ }
+ else
+ newctty = MACH_PORT_NULL;
+ 0;
+ }));
+
+ /* Install the new ctty port. */
+ _hurd_port_set (&d->ctty, newctty);
+ }
+
+ __mutex_unlock (&_hurd_dtable_lock);
+ 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. */
+ _hurd_port_set (&_hurd_ports[INIT_PORT_CTTYID], cttyid);
+
+ /* Reset all the ctty ports in all the descriptors. */
+ __USEPORT (CTTYID, (rectty_dtable (cttyid), 0));
+
+ return 0;
+}
+
+
+/* Make FD be the controlling terminal.
+ This function is called for `ioctl (fd, TCIOSCTTY)'. */
+
+static int
+tiocsctty (int fd,
+ int request) /* Always TIOCSCTTY. */
+{
+ mach_port_t cttyid;
+ error_t err;
+
+ /* Get FD's cttyid port, unless it is already ours. */
+ err = HURD_DPORT_USE (fd, ctty != MACH_PORT_NULL ? EADDRINUSE :
+ __term_getctty (port, &cttyid));
+ if (err == EADDRINUSE)
+ /* FD is already the ctty. Nothing to do. */
+ return 0;
+ else if (err)
+ return __hurd_fail (err);
+
+ /* Make it our own. */
+ _hurd_port_set (&_hurd_ports[INIT_PORT_CTTYID], cttyid);
+
+ /* Reset all the ctty ports in all the descriptors. */
+ __USEPORT (CTTYID, (rectty_dtable (cttyid), 0));
+
+ return 0;
+}
+_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 cell. */
+ _hurd_port_set (&_hurd_ports[INIT_PORT_CTTYID], MACH_PORT_NULL);
+
+ /* Reset all the ctty ports in all the descriptors. */
+
+ __USEPORT (CTTYID, (rectty_dtable (MACH_PORT_NULL), 0));
+
+ return 0;
+}
+_HURD_HANDLE_IOCTL (tiocnotty, TIOCNOTTY);