[PATCH net-next v2 5/6] selftests: forwarding: Redefine relative_path variable

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The following code which is part of lib.sh:
relative_path="${BASH_SOURCE%/*}"
if [[ "$relative_path" == "${BASH_SOURCE}" ]]; then
       relative_path="."
fi

reimplements functionality that is part of `dirname`:
$ dirname ""
.

To avoid this duplication, replace "relative_path" by "net_forwarding_dir",
a new variable defined using dirname.

Furthermore, to avoid the potential confusion about what "relative_path" is
about (cwd, test script directory or test library directory), define
"net_forwarding_dir" as the absolute path to net/forwarding/.

Tested-by: Petr Machata <petrm@xxxxxxxxxx>
Reviewed-by: Hangbin Liu <liuhangbin@xxxxxxxxx>
Signed-off-by: Benjamin Poirier <bpoirier@xxxxxxxxxx>
---
 tools/testing/selftests/net/forwarding/lib.sh            | 9 +++------
 tools/testing/selftests/net/forwarding/mirror_gre_lib.sh | 2 +-
 .../selftests/net/forwarding/mirror_gre_topo_lib.sh      | 2 +-
 3 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/tools/testing/selftests/net/forwarding/lib.sh b/tools/testing/selftests/net/forwarding/lib.sh
index 8a61464ab6eb..cf0ba4bfe50d 100644
--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -29,13 +29,10 @@ STABLE_MAC_ADDRS=${STABLE_MAC_ADDRS:=no}
 TCPDUMP_EXTRA_FLAGS=${TCPDUMP_EXTRA_FLAGS:=}
 TROUTE6=${TROUTE6:=traceroute6}
 
-relative_path="${BASH_SOURCE%/*}"
-if [[ "$relative_path" == "${BASH_SOURCE}" ]]; then
-	relative_path="."
-fi
+net_forwarding_dir=$(dirname "$(readlink -e "${BASH_SOURCE[0]}")")
 
-if [[ -f $relative_path/forwarding.config ]]; then
-	source "$relative_path/forwarding.config"
+if [[ -f $net_forwarding_dir/forwarding.config ]]; then
+	source "$net_forwarding_dir/forwarding.config"
 fi
 
 # Kselftest framework requirement - SKIP code is 4.
diff --git a/tools/testing/selftests/net/forwarding/mirror_gre_lib.sh b/tools/testing/selftests/net/forwarding/mirror_gre_lib.sh
index fac486178ef7..0c36546e131e 100644
--- a/tools/testing/selftests/net/forwarding/mirror_gre_lib.sh
+++ b/tools/testing/selftests/net/forwarding/mirror_gre_lib.sh
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
-source "$relative_path/mirror_lib.sh"
+source "$net_forwarding_dir/mirror_lib.sh"
 
 quick_test_span_gre_dir_ips()
 {
diff --git a/tools/testing/selftests/net/forwarding/mirror_gre_topo_lib.sh b/tools/testing/selftests/net/forwarding/mirror_gre_topo_lib.sh
index 39c03e2867f4..6e615fffa4ef 100644
--- a/tools/testing/selftests/net/forwarding/mirror_gre_topo_lib.sh
+++ b/tools/testing/selftests/net/forwarding/mirror_gre_topo_lib.sh
@@ -33,7 +33,7 @@
 #   |                                                                         |
 #   +-------------------------------------------------------------------------+
 
-source "$relative_path/mirror_topo_lib.sh"
+source "$net_forwarding_dir/mirror_topo_lib.sh"
 
 mirror_gre_topo_h3_create()
 {
-- 
2.43.0





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