/* Return 1 if FD is a terminal, 0 if not. */
int
__isatty (int fd)
{
error_t err;
mach_port_t id;
err = HURD_DPORT_USE (fd, __term_getctty (port, &id));
if (! err)
__mach_port_deallocate (__mach_task_self (), id);
return !err;
}
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);
}
