NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | CONFORMING TO | SEE ALSO | COLOPHON

TTYNAME(3)                    Linux Programmer's Manual                    TTYNAME(3)

NAME         top

       ttyname, ttyname_r - return name of a terminal

SYNOPSIS         top

       #include <unistd.h>

       char *ttyname(int fd);

       int ttyname_r(int fd, char *buf, size_t buflen);

DESCRIPTION         top

       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         top

       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         top

       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.

CONFORMING TO         top

       4.2BSD, POSIX.1-2001.

SEE ALSO         top

       fstat(2), isatty(3)

COLOPHON         top

       This page is part of release 3.23 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/.

Linux                                 2008-07-14                           TTYNAME(3)