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curs_print(3)                                                    curs_print(3)




NAME

       mcprint - ship binary data to printer


SYNOPSIS

       #include <curses.h>

       int mcprint(char *data, int len);


DESCRIPTION

       This function uses the mc5p or mc4 and mc5 capabilities, if they are
       present, to ship given data to a printer attached to the terminal.

       Note that the mcprint code has no way to do flow control with the printer
       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 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.


RETURN VALUE

       The mcprint function returns ERR if the write operation aborted for some
       reason.  In this case, errno will contain either an error associated with
       write(2) or one of the following:

       ENODEV
            Capabilities for printer redirection do not exist.

       ENOMEM
            Couldn't allocate sufficient memory to buffer the printer write.

       When mcprint succeeds, it returns the number of characters actually sent
       to the printer.


PORTABILITY

       The mcprint call was designed for ncurses(3X), and is not found in SVr4
       curses, 4.4BSD curses, or any other previous version of curses.


BUGS

       Padding in the mc5p, mc4 and mc5 capabilities will not be interpreted.


SEE ALSO

       curses(3X)



                                                                  curs_print(3)

ncurses 6.4 - Generated Wed Jan 4 18:44:03 CST 2023
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