TTYNAME(3)

NAME
       ttyname - return name of a terminal

SYNOPSIS
       #include <<unistd.h>>

       char *ttyname ( int desc );

DESCRIPTION
       Returns  a  pointer to the pathname of the terminal device
       that is open on the file descriptor desc, or NULL on error
       (for example, if desc is not connected to a terminal).

CONFORMING TO
       POSIX.1

SEE ALSO
       fstat(2) isatty(3)