From 8188c2466a7d2179aba4e243ff2b85363961f9f1 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 27 Apr 2015 21:27:05 +0200
Subject: [PATCH] alsa-info: Don't try update when wget isn't available

... otherwise it overwrites a zero size file.  Also add a check of
zero size file in the update procedure, too.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 alsa-info/alsa-info.sh | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/alsa-info/alsa-info.sh b/alsa-info/alsa-info.sh
index acd8495..0bc4cd0 100755
--- a/alsa-info/alsa-info.sh
+++ b/alsa-info/alsa-info.sh
@@ -35,6 +35,8 @@ BGTITLE="ALSA-Info v $SCRIPT_VERSION"
 PASTEBINKEY="C9cRIO8m/9y8Cs0nVs0FraRx7U0pHsuc"
 #Define some simple functions
 
+WGET=$(which wget 2>/dev/null| sed 's|^[^/]*||' 2>/dev/null)
+
 pbcheck(){
 	[[ $UPLOAD = "no" ]] && return
 
@@ -46,10 +48,12 @@ pbcheck(){
 }
 
 update() {
+	test -z "$WGET" -o ! -x "$WGET" && return
+
 	SHFILE=`mktemp -t alsa-info.XXXXXXXXXX` || exit 1
 	wget -O $SHFILE "http://www.alsa-project.org/alsa-info.sh" >/dev/null 2>&1
 	REMOTE_VERSION=`grep SCRIPT_VERSION $SHFILE |head -n1 |sed 's/.*=//'`
-	if [ "$REMOTE_VERSION" != "$SCRIPT_VERSION" ]; then
+	if [ -s "$SHFILE" -a "$REMOTE_VERSION" != "$SCRIPT_VERSION" ]; then
 		if [[ -n $DIALOG ]]
 		then
 			OVERWRITE=
@@ -831,8 +835,7 @@ if [ "$UPLOAD" = "no" ]; then
 fi # UPLOAD
 
 #Test that wget is installed, and supports --post-file. Upload $FILE if it does, and prompt user to upload file if it doesnt. 
-if
-WGET=$(which wget 2>/dev/null| sed 's|^[^/]*||' 2>/dev/null); [[ -n "${WGET}" ]] && [[ -x "${WGET}" ]] && [[ `wget --help |grep post-file` ]]
+if [[ -n "${WGET}" ]] && [[ -x "${WGET}" ]] && [[ `wget --help |grep post-file` ]]
 then
 
 if [[ -n $DIALOG ]]