.BS
'\" Note:  do not modify the .SH NAME line immediately below!
.SH NAME
fcopy \- Copy data from one channel to another
.SH SYNOPSIS
\fBfcopy \fIinputChan outputChan\fR ?\fB\-size \fIsize\fR? ?\fB\-command \fIcallback\fR?
.BE

.SH DESCRIPTION
.PP
The \fBfcopy\fR command copies data from one I/O channel, \fIinchan\fR to another I/O channel, \fIoutchan\fR.
The \fBfcopy\fR command leverages the buffering in the Tcl I/O system to
avoid extra copies and to avoid buffering too much data in
main memory when copying large files to destinations like
network sockets.