selftests: mptcp: userspace_pm: reduce dup code around printf

In this selftest, "printf" is always used with "stdbuf".

With a new helper, it is possible to call "stdbuf" only from one place.
This makes the code a bit clearer to read.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/net/mptcp/userspace_pm.sh b/tools/testing/selftests/net/mptcp/userspace_pm.sh
index 6b733b9..568ddee 100755 (executable)
--- a/tools/testing/selftests/net/mptcp/userspace_pm.sh
+++ b/tools/testing/selftests/net/mptcp/userspace_pm.sh
@@ -59,21 +59,24 @@ rndh=$(printf %x "$sec")-$(mktemp -u XXXXXX)
 ns1="ns1-$rndh"
 ns2="ns2-$rndh"
 ret=0
+_printf() {
+       stdbuf -o0 -e0 printf "${@}"
+}
 
 print_title()
 {
-       stdbuf -o0 -e0 printf "INFO: %s\n" "${1}"
+       _printf "INFO: %s\n" "${1}"
 }
 
 # $1: test name
 print_test()
 {
-       stdbuf -o0 -e0 printf "%-63s" "${1}"
+       _printf "%-63s" "${1}"
 }
 
 print_results()
 {
-       stdbuf -o0 -e0 printf "[%s]\n" "${1}"
+       _printf "[%s]\n" "${1}"
 }
 
 test_pass()
@@ -93,7 +96,7 @@ test_fail()
        ret=1
 
        if [ -n "${1}" ]; then
-               stdbuf -o0 -e0 printf "\t%s\n" "${1}"
+               _printf "\t%s\n" "${1}"
        fi
 }
 
@@ -127,7 +130,7 @@ cleanup()
 
        rm -rf $file $client_evts $server_evts
 
-       stdbuf -o0 -e0 printf "Done\n"
+       _printf "Done\n"
 }
 
 trap cleanup EXIT
@@ -288,7 +291,7 @@ check_expected_one()
                test_fail
        fi
 
-       stdbuf -o0 -e0 printf "\tExpected value for '%s': '%s', got '%s'.\n" \
+       _printf "\tExpected value for '%s': '%s', got '%s'.\n" \
                "${var}" "${!exp}" "${!var}"
        return 1
 }