ocf-shellfuncs: make ocf_is_bash4() detect Bash v4 or greater (which it was supposed to according to the comments)

Author: oalbrigt

heartbeat/ocf-shellfuncs.in

@@ -907,13 +907,18 @@ ocf_unique_rundir()
 # NB: FD 9 may be used for tracing with bash >= v4 in case
 # OCF_TRACE_FILE is set to a path.
 #
-ocf_is_bash4() {
+ocf_bash_has_xtracefd() {
 	echo "$SHELL" | grep bash > /dev/null &&
-			[ ${BASH_VERSINFO[0]} = "4" ]
+			[ ${BASH_VERSINFO[0]} -ge 4 ]
+}
+# for backwards compatibility
+ocf_is_bash4() {
+	ocf_bash_has_xtracefd
+	return $?
 }
 ocf_trace_redirect_to_file() {
 	local dest=$1
-	if ocf_is_bash4; then
+	if ocf_bash_has_xtracefd; then
 		exec 9>$dest
 		BASH_XTRACEFD=9
 	else
@@ -922,7 +927,7 @@ ocf_trace_redirect_to_file() {
 }
 ocf_trace_redirect_to_fd() {
 	local fd=$1
-	if ocf_is_bash4; then
+	if ocf_bash_has_xtracefd; then
 		BASH_XTRACEFD=$fd
 	else
 		exec 2>&$fd