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- * @Id: curs_initscr.3x,v 1.14 2005/05/15 16:18:01 tom Exp @
+ * @Id: curs_initscr.3x,v 1.20 2014/03/01 22:31:22 tom Exp @
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use <STRONG>newterm</STRONG>. The routine <STRONG>newterm</STRONG> should be called once
for each terminal. It returns a variable of type <STRONG>SCREEN</STRONG> <STRONG>*</STRONG>
which should be saved as a reference to that terminal.
- The arguments are the <EM>type</EM> of the terminal to be used in
- place of <STRONG>$TERM</STRONG>, a file pointer for output to the terminal,
- and another file pointer for input from the terminal (if
- <EM>type</EM> is <STRONG>NULL</STRONG>, <STRONG>$TERM</STRONG> will be used). The program must also
- call <STRONG>endwin</STRONG> for each terminal being used before exiting
- from <STRONG>curses</STRONG>. If <STRONG>newterm</STRONG> is called more than once for the
- same terminal, the first terminal referred to must be the
- last one for which <STRONG>endwin</STRONG> is called.
-
- A program should always call <STRONG>endwin</STRONG> before exiting or es-
- caping from <STRONG>curses</STRONG> mode temporarily. This routine re-
- stores 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 <STRONG>refresh</STRONG> or <STRONG>doupdate</STRONG> after
- a temporary escape causes the program to resume visual
- mode.
+ <STRONG>newterm</STRONG>'s arguments are
+
+ <STRONG>o</STRONG> the <EM>type</EM> of the terminal to be used in place of <STRONG>$TERM</STRONG>,
+
+ <STRONG>o</STRONG> a file pointer for output to the terminal, and
+
+ <STRONG>o</STRONG> another file pointer for input from the terminal
+
+ If the <EM>type</EM> parameter is <STRONG>NULL</STRONG>, <STRONG>$TERM</STRONG> will be used.
+
+ The program must also call <STRONG>endwin</STRONG> for each terminal being
+ used before exiting from <STRONG>curses</STRONG>. If <STRONG>newterm</STRONG> is called
+ more than once for the same terminal, the first terminal
+ referred to must be the last one for which <STRONG>endwin</STRONG> is
+ called.
+
+ A program should always call <STRONG>endwin</STRONG> before exiting or es-
+ caping from <STRONG>curses</STRONG> mode temporarily. This routine
+
+ <STRONG>o</STRONG> restores tty modes,
+
+ <STRONG>o</STRONG> moves the cursor to the lower left-hand corner of the
+ screen and
+
+ <STRONG>o</STRONG> resets the terminal into the proper non-visual mode.
+
+ Calling <STRONG>refresh</STRONG> or <STRONG>doupdate</STRONG> after a temporary escape caus-
+ es the program to resume visual mode.
The <STRONG>isendwin</STRONG> routine returns <STRONG>TRUE</STRONG> if <STRONG>endwin</STRONG> has been
called without any subsequent calls to <STRONG>wrefresh</STRONG>, and <STRONG>FALSE</STRONG>
Routines that return pointers always return <STRONG>NULL</STRONG> on error.
- X/Open defines no error conditions. In this implementa-
- tion <STRONG>endwin</STRONG> returns an error if the terminal was not ini-
- tialized.
+ X/Open defines no error conditions. In this implementa-
+ tion
+
+ <STRONG>o</STRONG> <STRONG>endwin</STRONG> returns an error if the terminal was not ini-
+ tialized.
+
+ <STRONG>o</STRONG> <STRONG>newterm</STRONG> returns an error if it cannot allocate the da-
+ ta structures for the screen, or for the top-level
+ windows within the screen, i.e., <STRONG>curscr</STRONG>, <STRONG>newscr</STRONG>, or
+ <STRONG>stdscr</STRONG>.
+
+ <STRONG>o</STRONG> <STRONG>set_term</STRONG> returns no error.
</PRE>
rather than exiting. It is safe but redundant to check
the return value of <STRONG>initscr</STRONG> in XSI Curses.
+ If the TERM variable is missing or empty, <STRONG>initscr</STRONG> uses the
+ value "unknown", which normally corresponds to a terminal
+ entry with the <EM>generic</EM> (<EM>gn</EM>) capability. Generic entries
+ are detected by <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG> and cannot be used for full-
+ screen operation. Other implementations may handle a
+ missing/empty TERM variable differently.
+
</PRE>
<H2>SEE ALSO</H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_kernel.3x.html">curs_kernel(3x)</A></STRONG>, <STRONG><A HREF="curs_refresh.3x.html">curs_refresh(3x)</A></STRONG>,
- <STRONG><A HREF="curs_slk.3x.html">curs_slk(3x)</A></STRONG>, <STRONG><A HREF="curs_util.3x.html">curs_util(3x)</A></STRONG>
+ <STRONG><A HREF="curs_slk.3x.html">curs_slk(3x)</A></STRONG>, <STRONG><A HREF="curs_terminfo.3x.html">curs_terminfo(3x)</A></STRONG>, <STRONG><A HREF="curs_util.3x.html">curs_util(3x)</A></STRONG>, <STRONG>curs_vari-</STRONG>
+ <STRONG><A HREF="curs_variables.3x.html">ables(3x)</A></STRONG>.
<STRONG><A HREF="curs_initscr.3x.html">curs_initscr(3x)</A></STRONG>
</PRE>
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