[iptables PATCH 2/5] tests: shell: Print escape sequences with terminals only

[Phil Sutter <phil@nwl.cc>]

If stdout is not a terminal, don't print the '[EXECUTING]' status line
which has to be cleared again.

Signed-off-by: Phil Sutter <phil@nwl.cc>
---
 iptables/tests/shell/run-tests.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/iptables/tests/shell/run-tests.sh b/iptables/tests/shell/run-tests.sh
index 2ad259c21644c..565b654e9f134 100755
--- a/iptables/tests/shell/run-tests.sh
+++ b/iptables/tests/shell/run-tests.sh
@@ -165,7 +165,7 @@ do_test() {
 
 	rc_spec=`echo $(basename ${testfile}) | cut -d _ -f2-`
 
-	msg_info "[EXECUTING]   $testfile"
+	[ -t 1 ] && msg_info "[EXECUTING]   $testfile"
 
 	if [ "$VERBOSE" = "y" ]; then
 		XT_MULTI=$xtables_multi unshare -n ${testfile}
@@ -173,7 +173,7 @@ do_test() {
 	else
 		XT_MULTI=$xtables_multi unshare -n ${testfile} > /dev/null 2>&1
 		rc_got=$?
-		echo -en "\033[1A\033[K" # clean the [EXECUTING] foobar line
+		[ -t 1 ] && echo -en "\033[1A\033[K" # clean the [EXECUTING] foobar line
 	fi
 
 	if [ "$rc_got" == "$rc_spec" ] ; then
-- 
2.47.0