From 63916eb39300d07ab672e43ce25f982c9be4e551 Mon Sep 17 00:00:00 2001
From: Alexandre Ghiti <alexandre.ghiti@smile.fr>
Date: Wed, 8 Nov 2017 14:52:40 +0100
Subject: [PATCH] create_ap: Check if stdbuf is available

Some embedded systems use Busybox which does not provide stdbuf: this
patch then avoids to use coreutils package which is much larger in size.
---
 create_ap | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/create_ap b/create_ap
index 81fbd59..b7c332d 100755
--- a/create_ap
+++ b/create_ap
@@ -1833,8 +1833,12 @@ if [[ $NO_HAVEGED -eq 0 ]]; then
     HAVEGED_WATCHDOG_PID=$!
 fi
 
-# start hostapd (use stdbuf for no delayed output in programs that redirect stdout)
-stdbuf -oL $HOSTAPD $HOSTAPD_DEBUG_ARGS $CONFDIR/hostapd.conf &
+# start hostapd (use stdbuf when available for no delayed output in programs that redirect stdout)
+STDBUF_PATH=`which stdbuf`
+if [ $? -eq 0 ]; then
+    STDBUF_PATH=$STDBUF_PATH" -oL"
+fi
+$STDBUF_PATH $HOSTAPD $HOSTAPD_DEBUG_ARGS $CONFDIR/hostapd.conf &
 HOSTAPD_PID=$!
 echo $HOSTAPD_PID > $CONFDIR/hostapd.pid