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researchv10 Dan Cross

.nr Hy 0
.nh
.ds ZZ DEVELOPMENT PACKAGE
.TH PSENDCHAR 3R "630 MTG"
.XE "psendchar()"
.XE "psendnchars()"
.XE "xpsendchar()"
.XE "xpsendnchars()"
.SH NAME
psendchar, psendnchars, xpsendchar, xpsendnchars \- send character to printer port
.SH SYNOPSIS
.ft B
int psendchar (c)
.sp
int xpsendchar (c)
.sp
void psendnchars (n, s)
.sp
void xpsendnchars (n, s)
.sp
char c;
.br
int n;
.br
char \(**s;
.SH DESCRIPTION
The
.I psendchar
function
sends a single byte to the printer output queue.
If the calling process does not own the printer,
.I psendchar
will send nothing to the printer and returns a 0.
Otherwise, 
.I psendchar
initiates printing
and returns a 1.
.PP
The
.I xpsendchar
function is identical to
.I psendchar
except that it may expand tabs and filter escape sequences
depending on the printer's setup values.
.PP
The
.I psendnchars
and
.I xpsendnchars
functions send the string
.I s
of length
.I n
to the printer.
\f2Xpsenchars\f1 handles expanding tabs and filtering escape sequences.
These routines block until all the characters fit on the printer output
queue.
.PP
If the printer output queue is full, the above functions will
block the
.br
calling process until they are able to place the data into 
the printer queue.

.SH SEE ALSO
resources(3R).

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