From c97d2d2b6d8db093bda061bbc4cd3018cb4b1e24 Mon Sep 17 00:00:00 2001
From: Mike Gabriel <mike.gabriel@das-netzwerkteam.de>
Date: Mon, 21 Nov 2016 16:08:32 +0100
Subject: impressive-display: Silence some grep calls.

---
 bin/impressive-display | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/bin/impressive-display b/bin/impressive-display
index bc0bac4..0e3bdf7 100755
--- a/bin/impressive-display
+++ b/bin/impressive-display
@@ -157,7 +157,7 @@ else
 	RESOLUTION="$DEFAULT_RESOLUTION"
 fi
 
-if ! echo "$PDF_URI" | grep -E "^(file://|http://|https://).*"; then
+if ! echo "$PDF_URI" | grep -q -E "^(file://|http://|https://).*"; then
 	$OUTPUT "ERROR: PDF_URI format not supported: $PDF_URI"
 	$OUTPUT "       Use file://<path>/<file>.pdf(.gz) or http(s)://<host>/<path>/<file>.pdf. Doing nothing."
 	exit -1
@@ -341,7 +341,7 @@ function download_pdffile {
 	fi
 
 	# is the PDF file gzipped?
-	if echo "$DOWNLOADED_FILE" | grep -E '.*\.gz$'; then
+	if echo "$DOWNLOADED_FILE" | grep -q -E '.*\.gz$'; then
 		gunzip -f "$DOWNLOADED_FILE"
 		mv "${DOWNLOADED_FILE/.gz/}" "$pdffile_downloaded"
 	else
-- 
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