diff options
Diffstat (limited to 'lib/ttyname_r.c')
-rw-r--r-- | lib/ttyname_r.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/lib/ttyname_r.c b/lib/ttyname_r.c new file mode 100644 index 0000000000..dc8b923f1b --- /dev/null +++ b/lib/ttyname_r.c @@ -0,0 +1,47 @@ +/* Determine name of a terminal. + + Copyright (C) 2010 Free Software Foundation, Inc. + + 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 3 of the License, 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, see <http://www.gnu.org/licenses/>. */ + +/* Written by Bruno Haible <bruno@clisp.org>, 2010. */ + +#include <config.h> + +#include <unistd.h> + +#include <errno.h> +#include <string.h> + +int +ttyname_r (int fd, char *buf, size_t buflen) +{ +#if HAVE_TTYNAME + /* Note: This is not multithread-safe. */ + char *name; + size_t namelen; + + name = ttyname (fd); + if (name == NULL) + return errno; + namelen = strlen (name) + 1; + if (namelen > buflen) + return ERANGE; + memcpy (buf, name, namelen); + return 0; +#else + /* Platforms like mingw: no ttys exist at all. */ + return ENOTTY; +#endif +} |