'''2004-8-28''' [SRIV] I use this code to print to a lpr printer from my tcl based text editor.

----
  proc lprprint { filename {hostname "localhost"} {queuename "lp"}} {
    set filehndl [open $filename r]
    fconfigure $filehndl -translation binary
    set printdata "[read $filehndl]"
    close $filehndl
  
    set n [string range [clock seconds] end-2 end]
    set size [string length $printdata]
  
    set c "HSYSM\n"
    append c "PSAF0006\n"
    append c "fdfA${n}SYSM\n"
    append c "UdfA${n}SYSM\n"
    append c "NDEFSYSM.SAF0006.SAF00066.JOB07513.D0000103.?\n"
  
    set clen [format %04d [string length $c]]
    set ca "\x02${queuename}\n"
    set cb "\x02${clen} cfA${n}SYSM\n"
    set da "\x03${size} dfA${n}SYSM\n"
    set safety [after 10000 {return}]
    set sockhandl [socket $hostname 515]
    fconfigure $sockhandl -translation binary
    puts -nonewline $sockhandl $ca
    flush $sockhandl
    set x [read $sockhandl 1]
  
    puts -nonewline $sockhandl $cb
    flush $sockhandl
    set x [read $sockhandl 1]
  
    puts -nonewline $sockhandl "$c\x00"
    flush $sockhandl
    set x [read $sockhandl 1]
  
    puts -nonewline $sockhandl "$da"
    flush $sockhandl
    set x [read $sockhandl 1]
  
    puts -nonewline $sockhandl "$printdata\x00"
    flush $sockhandl
  
    close $sockhandl
    after cancel $safety
  }
----
[Category String Processing] [Category Printing]