posix_ctermid Get path name of controlling terminal &reftitle.description; stringposix_ctermid Generates a string which is the pathname for the current controlling terminal for the process. On error this will set errno, which can be checked using posix_get_last_error &reftitle.returnvalues; Upon successful completion, returns string of the pathname to the current controlling terminal. Otherwise &false; is returned and errno is set, which can be checked with posix_get_last_error. &reftitle.examples; This example will display the path to the current TTY. ]]> &reftitle.seealso; posix_ttyname posix_get_last_error