/* 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 #include #include #include /* 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 /* 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 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);