curs_initscr(3X)                                           curs_initscr(3X)


   NAME
         cursinitscr:  initscr, newterm, endwin, isendwin, setterm,
         delscreen - curses screen initialization and manipulation routines

   SYNOPSIS
         #include <curses.h>

         WINDOW *initscr(void);
         int endwin(void);
         int isendwin(void);
         SCREEN *newterm(char *type, FILE *outfd, FILE *infd);
         SCREEN *setterm(SCREEN *new);
         void delscreen(SCREEN* sp);

   DESCRIPTION
         initscr is almost always the first routine that should be called (the
         exceptions are slkinit, filter, ripoffline, useenv and, for
         multiple-terminal applications, newterm.)  This determines the
         terminal type and initializes all curses data structures.  initscr
         also causes the first call to refresh to clear the screen.  If errors
         occur, initscr writes an appropriate error message to standard error
         and exits; otherwise, a pointer is returned to stdscr.  If the
         program needs an indication of error conditions, newterm() should be
         used instead of initscr; initscr should only be called once per
         application.

         A program that outputs to more than one terminal should use the
         newterm routine for each terminal instead of initscr.  A program that
         needs an indication of error conditions, so it can continue to run in
         a line-oriented mode if the terminal cannot support a screen-oriented
         program, would also use this routine.  The routine newterm should be
         called once for each terminal.  It returns a variable of type SCREEN
         * which should be saved as a reference to that terminal.  The
         arguments are the type of the terminal to be used in place of $TERM,
         a file pointer for output to the terminal, and another file pointer
         for input from the terminal (if type is NULL, $TERM will be used).
         The program must also call endwin for each terminal being used before
         exiting from curses.  If newterm is called more than once for the
         same terminal, the first terminal referred to must be the last one
         for which endwin is called.

         A program should always call endwin before exiting or escaping from
         curses mode temporarily.  This routine restores tty modes, moves the
         cursor to the lower left-hand corner of the screen and resets the
         terminal into the proper non-visual mode.  Calling refresh or
         doupdate after a temporary escape causes the program to resume visual
         mode.

         The isendwin routine returns TRUE if endwin has been called without
         any subsequent calls to wrefresh, and FALSE otherwise.



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   curs_initscr(3X)                                           curs_initscr(3X)


         The setterm routine is used to switch between different terminals.
         The screen reference new becomes the new current terminal.  The
         previous terminal is returned by the routine.  This is the only
         routine which manipulates SCREEN pointers; all other routines affect
         only the current terminal.

         The delscreen routine frees storage associated with the SCREEN data
         structure.  The endwin routine does not do this, so delscreen should
         be called after endwin if a particular SCREEN is no longer needed.

   RETURN VALUE
         endwin returns the integer ERR upon failure and 0 upon successful
         completion.

         Routines that return pointers always return NULL on error.

   NOTES
         The header file <curses.h> automatically includes the header files
         <stdio.h> and <unctrl.h>.

         Note that initscr and newterm may be macros.

   SEE ALSO
         curses(3X), curskernel(3X), cursrefresh(3X), cursslk(3X),
         cursutil(3X).




























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