X-Git-Url: https://ncurses.scripts.mit.edu/?p=ncurses.git;a=blobdiff_plain;f=man%2Fcurs_print.3x;h=8bde817d92f01723103abfe8d1057295cdaba7e4;hp=039f5b73f3216505f39be3984ae2c5edc4a4cca5;hb=42259b594b5dabd37fe2bc294051d2db82e873a2;hpb=58552e8c761a70f8f0bd591fecdf576fa8216e3e;ds=sidebyside diff --git a/man/curs_print.3x b/man/curs_print.3x index 039f5b73..8bde817d 100644 --- a/man/curs_print.3x +++ b/man/curs_print.3x @@ -1,5 +1,6 @@ .\"*************************************************************************** -.\" Copyright (c) 1998-2010,2017 Free Software Foundation, Inc. * +.\" Copyright 2018,2020 Thomas E. Dickey * +.\" Copyright 1998-2010,2017 Free Software Foundation, Inc. * .\" * .\" Permission is hereby granted, free of charge, to any person obtaining a * .\" copy of this software and associated documentation files (the * @@ -26,29 +27,32 @@ .\" authorization. * .\"*************************************************************************** .\" -.\" $Id: curs_print.3x,v 1.11 2017/01/07 17:33:15 tom Exp $ +.\" $Id: curs_print.3x,v 1.16 2020/10/24 09:25:14 tom Exp $ .TH curs_print 3X "" .SH NAME \fBmcprint\fR \- ship binary data to printer .SH SYNOPSIS \fB#include \fR .sp -\fBint mcprint(char *data, int len);\fR +\fBint mcprint(char *\fP\fIdata\fP\fB, int \fP\fIlen\fP\fB);\fR .SH DESCRIPTION This function uses the \fBmc5p\fR or \fBmc4\fR and \fBmc5\fR capabilities, if they are present, to ship given data to a printer attached to the terminal. .PP Note that the \fBmcprint\fR code has no way to do flow control with the printer -or to know how much buffering it has. Your application is responsible for +or to know 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 cps rating). Dot-matrix printers and +(typically about half of its nominal cps rating). +Dot-matrix printers and 6-page-per-minute lasers can typically handle 80cps, so a good conservative rule of thumb is to sleep for a second after shipping each 80-character line. . .SH RETURN VALUE The \fBmcprint\fR function returns \fBERR\fR if the write operation aborted -for some reason. In this case, errno will contain either an error associated -with \fBwrite(2)\fR or one of the following: +for some reason. +In this case, \fBerrno\fP will contain either an error associated +with \fBwrite\fP(2) or one of the following: .TP 5 ENODEV Capabilities for printer redirection do not exist.