TTYNAME(3C)         UNIX Programmer's Manual          TTYNAME(3C)

NAME
     ttyname, isatty - find name of a terminal

SYNOPSIS
     char *ttyname (fildes)

     int isatty (fildes)

HP-UX COMPATIBILITY
     Level:    HP-UX/RUN ONLY

     Origin:   System III

DESCRIPTION
     _T_t_y_n_a_m_e returns a pointer to the null-terminated  path  name
     of  the  terminal  device  associated  with  file descriptor
     _f_i_l_d_e_s.

     _I_s_a_t_t_y returns 1 if _f_i_l_d_e_s is  associated  with  a  terminal
     device, 0 otherwise.

FILES
     /dev/*

DIAGNOSTICS
     _T_t_y_n_a_m_e returns a  null  pointer  (0)  if  _f_i_l_d_e_s  does  not
     describe a terminal device in directory /dev.

BUGS
     The return value points to  static  data  whose  content  is
     overwritten by each call.