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/* Copyright (C) 1991-2013 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 <stdio.h>
#include <string.h>
/* Return the name of the controlling terminal.
If S is not NULL, the name is copied into it (it should be at
least L_ctermid bytes long), otherwise a static buffer is used. */
char *
ctermid (s)
char *s;
{
static char name[L_ctermid];
if (s == NULL)
s = name;
return strcpy (s, "/dev/tty");
}
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