[PATCH bpf v3] selftests/bpf: convert test_xdp_redirect.sh to bash

["Björn Töpel" <bjorn.topel@gmail.com>]

From: Björn Töpel <bjorn.topel@intel.com>

The test_xdp_redirect.sh script uses a bash feature, '&>'. On systems,
e.g. Debian, where '/bin/sh' is dash, this will not work as
expected. Use bash in the shebang to get the expected behavior.

Further, using 'set -e' means that the error of a command cannot be
captured without the command being executed with '&&' or '||'. Let us
use '||' to capture the return value of a failed command.

v3: Reintroduced /bin/bash, and kept 'set -e'. (Andrii)
v2: Kept /bin/sh and removed bashisms. (Randy)

Acked-by: William Tu <u9012063@gmail.com>
Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
---
 tools/testing/selftests/bpf/test_xdp_redirect.sh | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_xdp_redirect.sh b/tools/testing/selftests/bpf/test_xdp_redirect.sh
index dd80f0c84afb..3f85a82f1c89 100755
--- a/tools/testing/selftests/bpf/test_xdp_redirect.sh
+++ b/tools/testing/selftests/bpf/test_xdp_redirect.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # Create 2 namespaces with two veth peers, and
 # forward packets in-between using generic XDP
 #
@@ -43,6 +43,8 @@ cleanup()
 test_xdp_redirect()
 {
 	local xdpmode=$1
+	local ret1=0
+	local ret2=0
 
 	setup
 
@@ -57,10 +59,8 @@ test_xdp_redirect()
 	ip link set dev veth1 $xdpmode obj test_xdp_redirect.o sec redirect_to_222 &> /dev/null
 	ip link set dev veth2 $xdpmode obj test_xdp_redirect.o sec redirect_to_111 &> /dev/null
 
-	ip netns exec ns1 ping -c 1 10.1.1.22 &> /dev/null
-	local ret1=$?
-	ip netns exec ns2 ping -c 1 10.1.1.11 &> /dev/null
-	local ret2=$?
+	ip netns exec ns1 ping -c 1 10.1.1.22 &> /dev/null || ret1=$?
+	ip netns exec ns2 ping -c 1 10.1.1.11 &> /dev/null || ret2=$?
 
 	if [ $ret1 -eq 0 -a $ret2 -eq 0 ]; then
 		echo "selftests: test_xdp_redirect $xdpmode [PASS]";

base-commit: 6183f4d3a0a2ad230511987c6c362ca43ec0055f
-- 
2.27.0