Function to lookup variables in config.txt

bin/ATLAS

@@ -21,15 +21,9 @@ fi
 . $BIN_DIR/common.sh
 
 # config variables
-CONFIG_TXT="$BASE_DIR/state/config.txt"
-
-# Look for options in config.txt
-if [ -f "$CONFIG_TXT" ]
+if [ $(config_lookup RXTXRPT no) = yes ]
 then
-	if grep "^[ 	]*RXTXRPT=yes" "$CONFIG_TXT"
-	then
-		do_rxtxrpt=yes
-	fi
+	do_rxtxrpt=yes
 fi
 
 $MOUNT_FS_CMD

bin/arch/linux/linux-functions.sh

@@ -176,3 +176,23 @@ hash_ssh_pubkey()
 		tr -d '\n' | sha256sum)
 	expr "$hash" : "\(.\{16\}\)"
 }
+config_lookup()
+{
+	key="$1"
+	default_value="$2"
+
+	# Look for options in config.txt
+	if [ ! -f "$CONFIG_TXT" ]
+	then
+		echo "$default_value"
+		return
+	fi
+	value=$(sed < "$CONFIG_TXT" -n "s/^[ 	]*$key=\(.*\)/\1/p" |
+		head -1 | sed 's/[ 	]*$//')
+	if [ -n "$value" ]
+	then
+		echo "$value"
+	else
+		echo "$default_value"
+	fi
+}

bin/common-pre.sh

@@ -11,3 +11,4 @@ RUN_DIR=$BASE_DIR/run
 CON_KEEP_PID=con_keep_pid.vol
 RESOLV_CONF_STATIC='/etc/resolv.conf.static'
 REG_INIT_REPLY=$STATUS_DIR/reg_init_reply.txt
+CONFIG_TXT="$BASE_DIR/state/config.txt"