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* @Id: curs_print.3x,v 1.41 2025/02/15 18:42:34 tom Exp @
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
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<meta name="generator" content="Manpage converted by man2html - see https://invisible-island.net/scripts/readme.html#others_scripts">
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<TITLE>curs_print 3x 2025-02-15 ncurses 6.6 Library calls</TITLE>
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<link rel="author" href="mailto:bug-ncurses@gnu.org">
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<H1 class="no-header">curs_print 3x 2025-02-15 ncurses 6.6 Library calls</H1>
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<PRE>
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<STRONG><A HREF="curs_print.3x.html">curs_print(3x)</A></STRONG> Library calls <STRONG><A HREF="curs_print.3x.html">curs_print(3x)</A></STRONG>
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</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
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<STRONG>mcprint</STRONG> - write binary data to printer using <EM>terminfo</EM> capabilities
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</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
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<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
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<STRONG>int</STRONG> <STRONG>mcprint(char</STRONG> <STRONG>*</STRONG> <EM>data</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>len</EM><STRONG>);</STRONG>
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</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
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<STRONG>mcprint</STRONG>, an <EM>ncurses</EM> extension to the <EM>curses</EM> library, uses the
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terminal's <STRONG>prtr_non</STRONG> (<STRONG>mc5p</STRONG>) or <STRONG>prtr_on</STRONG> (<STRONG>mc5</STRONG>) and <STRONG>prtr_off</STRONG> (<STRONG>mc4</STRONG>) media
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copy capabilities, if defined, to send <EM>len</EM> bytes of the given string
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<EM>data</EM> to a printer attached to the terminal.
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<STRONG>mcprint</STRONG> has no means of flow control to the printer nor of knowing how
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much buffering it has. Your application is responsible for keeping the
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rate of writes to the printer below its continuous throughput rate,
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typically about half of its nominal characters-per-second (cps) rating.
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Dot-matrix printers and 6-page-per-minute laser printers can typically
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handle 80 cps, so a conservative rule of thumb is to sleep for one
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second after sending an 80-character line.
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</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
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On success, <STRONG>mcprint</STRONG> returns the number of characters sent to the
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printer.
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<STRONG>mcprint</STRONG> returns <STRONG>ERR</STRONG> if the write operation fails for any reason. In
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that event, <STRONG>errno</STRONG> contains either a value set by <STRONG>write(2)</STRONG>, or one of
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the following.
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<STRONG>ENODEV</STRONG>
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The terminal lacks relevant media copy capabilities.
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<STRONG>ENOMEM</STRONG>
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<EM>ncurses</EM> could not allocate sufficient memory to buffer the write
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operation.
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</PRE><H2><a name="h2-EXTENSIONS">EXTENSIONS</a></H2><PRE>
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<STRONG>mcprint</STRONG> is an <STRONG><A HREF="ncurses.3x.html">ncurses(3x)</A></STRONG> extension, and is not found in SVr4 <EM>curses</EM>,
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4.4BSD <EM>curses</EM>, or any other previous <EM>curses</EM> implementation.
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</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
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Applications employing this <EM>ncurses</EM> extension should condition its use
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on the visibility of the <STRONG>NCURSES_VERSION</STRONG> preprocessor macro.
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</PRE><H2><a name="h2-HISTORY">HISTORY</a></H2><PRE>
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<EM>ncurses</EM> introduced <EM>mcprint</EM> prior to version 1.9.9g (1996).
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</PRE><H2><a name="h2-BUGS">BUGS</a></H2><PRE>
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Padding in the <STRONG>prtr_non</STRONG> (<STRONG>mc5p</STRONG>), <STRONG>prtr_on</STRONG> (<STRONG>mc5</STRONG>), and <STRONG>prtr_off</STRONG> (<STRONG>mc4</STRONG>)
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capabilities is not interpreted.
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</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
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<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>
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ncurses 6.6 2025-02-15 <STRONG><A HREF="curs_print.3x.html">curs_print(3x)</A></STRONG>
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</PRE>
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<div class="nav">
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<ul>
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<li><a href="#h2-NAME">NAME</a></li>
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<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
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<li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
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<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
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<li><a href="#h2-EXTENSIONS">EXTENSIONS</a></li>
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<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
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<li><a href="#h2-HISTORY">HISTORY</a></li>
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<li><a href="#h2-BUGS">BUGS</a></li>
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<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
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</ul>
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</div>
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