Name

ttyname, ttyname_r — return name of a terminal

Synopsis

        #include <unistd.h>
char *ttyname( int fd);
 
int ttyname_r( int fd,
  char *buf,
  size_t buflen);
 

DESCRIPTION

The function ttyname() returns a pointer to the null-terminated pathname of the terminal device that is open on the file descriptor fd, or NULL on error (for example, if fd is not connected to a terminal). The return value may point to static data, possibly overwritten by the next call. The function ttyname_r() stores this pathname in the buffer buf of length buflen.

RETURN VALUE

The function ttyname() returns a pointer to a pathname on success. On error, NULL is returned, and errno is set appropriately. The function ttyname_r() returns 0 on success, and an error number upon error.

ERRORS

EBADF

Bad file descriptor.

ENOTTY

File descriptor does not refer to a terminal device.

ERANGE

(ttyname_r()) buflen was too small to allow storing the pathname.

ATTRIBUTES

For an explanation of the terms used in this section, see attributes(7).

Interface Attribute Value
ttyname() Thread safety MT-Unsafe race:ttyname
ttyname_r() Thread safety MT-Safe

CONFORMING TO

POSIX.1-2001, POSIX.1-2008, 4.2BSD.

SEE ALSO

fstat(2), ctermid(3), isatty(3)

COLOPHON

This page is part of release 4.07 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man−pages/.


  Copyright (c) 1995 Jim Van Zandt <jrvvanzandt.mv.com>

%%%LICENSE_START(GPLv2+_DOC_FULL)
This is free documentation; 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 of
the License, or (at your option) any later version.

The GNU General Public License's references to "object code"
and "executables" are to be interpreted as the output of any
document formatting or typesetting system, including
intermediate and printed output.

This manual 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 manual; if not, see
<http://www.gnu.org/licenses/>.
%%%LICENSE_END

Modified 2001-12-13, Martin Schulze <joeyinfodrom.org>
Added ttyname_r, aeb, 2002-07-20