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
ttyname_r():
EBADF
Bad file descriptor.
ENOTTY
File descriptor does not refer to a terminal device.
ERANGE
buflen
was too small to allow storing the pathname.
This page is part of release 3.14 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
