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<H1 class="no-header">curs_print 3x 2025-02-15 ncurses 6.6 Library calls</H1>
<PRE>
<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>
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
<STRONG>mcprint</STRONG> - write binary data to printer using <EM>terminfo</EM> capabilities
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
<STRONG>int</STRONG> <STRONG>mcprint(char</STRONG> <STRONG>*</STRONG> <EM>data</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>len</EM><STRONG>);</STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
<STRONG>mcprint</STRONG>, an <EM>ncurses</EM> extension to the <EM>curses</EM> library, uses the
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
copy capabilities, if defined, to send <EM>len</EM> bytes of the given string
<EM>data</EM> to a printer attached to the terminal.
<STRONG>mcprint</STRONG> has no means of flow control to the printer nor of knowing how
much buffering it has. Your application is responsible for keeping the
rate of writes to the printer below its continuous throughput rate,
typically about half of its nominal characters-per-second (cps) rating.
Dot-matrix printers and 6-page-per-minute laser printers can typically
handle 80 cps, so a conservative rule of thumb is to sleep for one
second after sending an 80-character line.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
On success, <STRONG>mcprint</STRONG> returns the number of characters sent to the
printer.
<STRONG>mcprint</STRONG> returns <STRONG>ERR</STRONG> if the write operation fails for any reason. In
that event, <STRONG>errno</STRONG> contains either a value set by <STRONG>write(2)</STRONG>, or one of
the following.
<STRONG>ENODEV</STRONG>
The terminal lacks relevant media copy capabilities.
<STRONG>ENOMEM</STRONG>
<EM>ncurses</EM> could not allocate sufficient memory to buffer the write
operation.
</PRE><H2><a name="h2-EXTENSIONS">EXTENSIONS</a></H2><PRE>
<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>,
4.4BSD <EM>curses</EM>, or any other previous <EM>curses</EM> implementation.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
Applications employing this <EM>ncurses</EM> extension should condition its use
on the visibility of the <STRONG>NCURSES_VERSION</STRONG> preprocessor macro.
</PRE><H2><a name="h2-HISTORY">HISTORY</a></H2><PRE>
<EM>ncurses</EM> introduced <EM>mcprint</EM> prior to version 1.9.9g (1996).
</PRE><H2><a name="h2-BUGS">BUGS</a></H2><PRE>
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>)
capabilities is not interpreted.
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>
ncurses 6.6 2025-02-15 <STRONG><A HREF="curs_print.3x.html">curs_print(3x)</A></STRONG>
</PRE>
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<li><a href="#h2-NAME">NAME</a></li>
<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
<li><a href="#h2-EXTENSIONS">EXTENSIONS</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
<li><a href="#h2-HISTORY">HISTORY</a></li>
<li><a href="#h2-BUGS">BUGS</a></li>
<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
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