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curs_initscr(3X)					      curs_initscr(3X)

       initscr,	newterm, endwin, isendwin, set_term, delscreen - curses	screen
       initialization and manipulation routines

       #include	<curses.h>

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

       initscr is normally the first curses routine to call when  initializing
       a  program.   A few special routines sometimes need to be called	before
       it; these are slk_init, filter, ripoffline, use_env.  For multiple-ter-
       minal applications, newterm may be called before	initscr.

       The  initscr  code  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  re-
       turned to stdscr.

       A program that outputs to more than one terminal	should use the newterm
       routine for each	terminal instead of initscr.  A	program	that needs  to
       inspect capabilities, so	it can continue	to run in a line-oriented mode
       if the terminal cannot support a	screen-oriented	 program,  would  also
       use newterm.  The routine newterm should	be called once for each	termi-
       nal.  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	termi-
       nal,  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 ter-
       minal into the proper non-visual	mode.  Calling refresh or doupdate af-
       ter 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.

       The set_term routine is used to	switch	between	 different  terminals.
       The  screen reference new becomes the new current terminal.  The	previ-
       ous 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.

       endwin returns the integer ERR upon failure and OK upon successful com-

       Routines	that return pointers always return NULL	on error.

       Note that initscr and newterm may be macros.

       These  functions	are described in the XSI Curses	standard, Issue	4.  It
       specifies that portable applications must not call  initscr  more  than

       Old versions of curses, e.g., BSD 4.4, may have returned	a null pointer
       from initscr when an error is detected, rather  than  exiting.	It  is
       safe but	redundant to check the return value of initscr in XSI Curses.

       curses(3X),     curs_kernel(3X),	    curs_refresh(3X),	 curs_slk(3X),



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