


      TTYNAME(3C)                 (UNIX 5.0)                TTYNAME(3C)



      NAME
           ttyname, isatty - find name of a terminal

      SYNTAX
           char *ttyname (fildes)
           int fildes;

           int isatty (fildes)
           int fildes;

      DESCRIPTION
           Ttyname returns a pointer to a string containing the null-
           terminated path name of the terminal device associated with
           file descriptor fildes.

           Isatty returns 1 if fildes is associated with a terminal
           device, 0 otherwise.

      FILES
           /dev/*

      DIAGNOSTICS
           Ttyname returns a NULL pointer if fildes does not describe a
           terminal device in directory /dev.

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



























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