| /* Copyright (C) 1991-2016 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 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); |
| } |