From 412efcb1aea3a0803dd3eeae24f80ce62de86238 Mon Sep 17 00:00:00 2001
From: Přemysl Janouch <p@janouch.name>
Date: Sun, 14 Apr 2019 21:34:56 +0200
Subject: Flush input buffers on printer initialization

Seems to be necessary, not sure why.
---
 ql/ql_linux.go | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

(limited to 'ql')

diff --git a/ql/ql_linux.go b/ql/ql_linux.go
index 1b1f22c..9d465b5 100644
--- a/ql/ql_linux.go
+++ b/ql/ql_linux.go
@@ -108,16 +108,14 @@ func (p *Printer) Initialize() error {
 
 	// Flush any former responses in the printer's queue.
 	//
-	// I'm not sure if this is necessary, or rather whether the kernel driver
-	// does any buffering that could cause data to be returned at this point.
-	/*
-		var dummy [32]byte
-		for {
-			if _, err := f.Read(dummy[:]); err == io.EOF {
-				break
-			}
+	// I haven't checked if this is the kernel driver or the printer doing
+	// the buffering that causes data to be returned at this point.
+	var dummy [32]byte
+	for {
+		if _, err := p.File.Read(dummy[:]); err == io.EOF {
+			break
 		}
-	*/
+	}
 
 	return nil
 }
-- 
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