[SRU][Q][PATCH 1/1] selftests: net: use BASH for bareudp testing

[Po-Hsu Lin]

In bareudp.sh, this script uses /bin/sh and it will load another lib.sh
BASH script at the very beginning.

But on some operating systems like Ubuntu, /bin/sh is actually pointed to
DASH, thus it will try to run BASH commands with DASH and consequently
leads to syntax issues:
  # ./bareudp.sh: 4: ./lib.sh: Bad substitution
  # ./bareudp.sh: 5: ./lib.sh: source: not found
  # ./bareudp.sh: 24: ./lib.sh: Syntax error: "(" unexpected

Fix this by explicitly using BASH for bareudp.sh. This fixes test
execution failures on systems where /bin/sh is not BASH.

Reported-by: Edoardo Canepa <edoardo.canepa at canonical.com>
Link: https://bugs.launchpad.net/bugs/2129812
Signed-off-by: Po-Hsu Lin <po-hsu.lin at canonical.com>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel at intel.com>
Link: https://patch.msgid.link/20251027095710.2036108-2-po-hsu.lin@canonical.com
Signed-off-by: Jakub Kicinski <kuba at kernel.org>
(cherry picked from commit 9311e9540a8b406d9f028aa87fb072a3819d4c82)
Signed-off-by: Po-Hsu Lin <po-hsu.lin at canonical.com>
---
 tools/testing/selftests/net/bareudp.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/net/bareudp.sh b/tools/testing/selftests/net/bareudp.sh
index f366cadbc5e8..ff4308b48e65 100755
--- a/tools/testing/selftests/net/bareudp.sh
+++ b/tools/testing/selftests/net/bareudp.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # SPDX-License-Identifier: GPL-2.0
 
 # Test various bareudp tunnel configurations.
-- 
2.34.1