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-
-
-
- initscr, newterm, endwin, isendwin, set_term, delscreen -
- curses screen initialization and manipulation routines
-
-
-
-SYNOPSIS
- #include
-
- WINDOW *initscr(void);
- int endwin(void);
- int isendwin(void);
- SCREEN *newterm(const char *type, FILE *outfd, FILE
- *infd);
- SCREEN *set_term(SCREEN *new);
- void delscreen(SCREEN* sp);
-
-
-
-DESCRIPTION
- 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-terminal applications,
- newterm may be called before initscr.
-
- The initscr code determines the terminal type and initial-
- izes 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.
-
- 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 ter-
- minal cannot support a screen-oriented program, would also
- use newterm. 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.
- 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 cur-
- rent terminal. The previous terminal is returned by the
- routine. This is the only routine which manipulates
- SCREEN pointers; all other routines affect only the cur-
- rent 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 par-
- ticular SCREEN is no longer needed.
-
-
-
-RETURN VALUE
- endwin returns the integer ERR upon failure and OK upon
- successful completion.
-
- Routines that return pointers always return NULL on error.
-
-
-
-NOTES
- Note that initscr and newterm may be macros.
-
-
-
-PORTABILITY
- These functions are described in the XSI Curses standard,
- Issue 4. It specifies that portable applications must not
- call initscr more than once.
-
-
-
-SEE ALSO
- curses(3X), curs_kernel(3X), curs_refresh(3X),
- curs_slk(3X), curs_util(3X)
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