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/* The type ps_tty_t, for per-tty info.
Copyright (C) 1995 Free Software Foundation, Inc.
Written by Miles Bader <miles@gnu.ai.mit.edu>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <hurd.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "ps.h"
#include "common.h"
/* ---------------------------------------------------------------- */
/* Create a ps_tty_t for the tty referred to by PORT, returning it in TTY.
If a memory allocation error occurs, ENOMEM is returned, otherwise 0. */
error_t
ps_tty_create(file_t port, ps_tty_t *tty)
{
*tty = NEW(struct ps_tty);
if (*tty == NULL)
return ENOMEM;
(*tty)->port = port;
(*tty)->name_state = PS_TTY_NAME_PENDING;
return 0;
}
/* Frees TTY and any resources it consumes. */
void
ps_tty_free(ps_tty_t tty)
{
mach_port_deallocate(mach_task_self(), tty->port);
if (tty->name_state == PS_TTY_NAME_OK && tty->name != NULL)
free(tty->name);
free(tty);
}
/* ---------------------------------------------------------------- */
/* Returns the name of the tty, or NULL if it can't be figured out. */
char *ps_tty_name(ps_tty_t tty)
{
if (tty->name_state == PS_TTY_NAME_PENDING)
{
string_t buf;
if (term_get_nodename(tty->port, &buf) != 0)
/* There is a terminal there, but we can't figure out its name. */
tty->name_state = PS_TTY_NAME_ERROR;
else
{
tty->name = NEWVEC(char, strlen(buf) + 1);
if (tty->name == NULL)
tty->name_state = PS_TTY_NAME_ERROR;
else
{
strcpy(tty->name, buf);
tty->name_state = PS_TTY_NAME_OK;
}
}
}
if (tty->name_state == PS_TTY_NAME_OK)
return tty->name;
else
return NULL;
}
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