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/* Copyright (C) 1991-2020 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
<https://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 we return a pointer to a non-const but read-only
string literal, that POSIX states the caller must not modify. */
char *
ctermid (char *s)
{
char *name = (char /*drop const*/ *) "/dev/tty";
if (s == NULL)
return name;
return strcpy (s, name);
}
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