[PATCH v3 5/5] selftests: ftrace: Check given string is not zero-length

Masami Hiramatsu
2017-07-06T09:13:09Z

Use [ ! -z "$VAR" ] instead of [ "$VAR" ] to check
whether the given string variable is not zero-length
since it obviously shows what it means.

Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
---
tools/testing/selftests/ftrace/ftracetest | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/ftrace/ftracetest b/tools/testing/selftests/ftrace/ftracetest
index 453f73d..aab3d5e 100755
--- a/tools/testing/selftests/ftrace/ftracetest
+++ b/tools/testing/selftests/ftrace/ftracetest
@@ -8,7 +8,7 @@
# Released under the terms of the GPL v2.

usage() { # errno [message]
-[ "$2" ] && echo $2
+[ ! -z "$2" ] && echo $2
echo "Usage: ftracetest [options] [testcase(s)] [testcase-directory(s)]"
echo " Options:"
echo " -h|--help Show help message"
@@ -50,7 +50,7 @@ parse_opts() { # opts
local OPT_TEST_CASES=
local OPT_TEST_DIR=

- while [ "$1" ]; do
+ while [ ! -z "$1" ]; do
case "$1" in
--help|-h)
usage 0
@@ -96,7 +96,7 @@ parse_opts() { # opts
;;
esac
done
- if [ "$OPT_TEST_CASES" ]; then
+ if [ ! -z "$OPT_TEST_CASES" ]; then
TEST_CASES=$OPT_TEST_CASES
fi
}