Add a couple of helpers which can be used by tests which need to run a specific bash command on a different target than the local system, be it either another netns or a remote system accessible through ssh.
The __run_on() function is passed through $1 the target on which the command should be executed while run_on() is passed the name of the interface that is then used to retrieve the target from the TARGETS array. Signed-off-by: Ioana Ciornei <[email protected]> --- Changes in v4: - reworked the helpers so that no global variable is used and information is passed only through parameters Changes in v3: - s/TARGET/CUR_TARGET - always fallback on running a command locally when either TARGETS is not declared or there is no entry for a specific interface Changes in v2: - patch is new tools/testing/selftests/net/lib.sh | 38 ++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/tools/testing/selftests/net/lib.sh b/tools/testing/selftests/net/lib.sh index b40694573f4c..6c0d613a4de5 100644 --- a/tools/testing/selftests/net/lib.sh +++ b/tools/testing/selftests/net/lib.sh @@ -670,3 +670,41 @@ cmd_jq() # return success only in case of non-empty output [ ! -z "$output" ] } + +__run_on() +{ + local target=$1; shift + local type args + + IFS=':' read -r type args <<< "$target" + + case "$type" in + netns) + # Execute command in network namespace + # args contains the namespace name + ip netns exec "$args" "$@" + ;; + ssh) + # Execute command via SSH args contains user@host + ssh -n "$args" "$@" + ;; + local|*) + # Execute command locally. This is also the fallback + # case for when the interface's target is not found in + # the TARGETS array. + "$@" + ;; + esac +} + +run_on() +{ + local iface=$1; shift + local target="local:" + + if declare -p TARGETS &>/dev/null; then + target="${TARGETS[$iface]}" + fi + + __run_on "$target" "$@" +} -- 2.25.1
