[ima-evm-utils PATCH v2 04/14] tests: Address issues raised by shellcheck SC2320

[Stefan Berger <stefanb@linux.ibm.com>]

Address issues raised by shellcheck SC2320:
  "This $? refers to echo/printf, not a previous command.
   Assign to variable to avoid it being overwritten."

Signed-off-by: Stefan Berger <stefanb@linux.ibm.com>
---
 tests/Makefile.am              | 2 +-
 tests/mmap_check.test          | 8 +++-----
 tests/portable_signatures.test | 9 +++------
 3 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/tests/Makefile.am b/tests/Makefile.am
index 6fe18e4..3713771 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -26,7 +26,7 @@ clean-local:
 distclean: distclean-keys
 
 shellcheck:
-	shellcheck -i SC2086,SC2181,SC2046 \
+	shellcheck -i SC2086,SC2181,SC2046,SC2320 \
 		functions.sh gen-keys.sh install-fsverity.sh \
 		install-mount-idmapped.sh install-openssl3.sh \
 		install-swtpm.sh install-tss.sh softhsm_setup \
diff --git a/tests/mmap_check.test b/tests/mmap_check.test
index 2dd3433..e3e5c71 100755
--- a/tests/mmap_check.test
+++ b/tests/mmap_check.test
@@ -97,14 +97,12 @@ check_load_ima_rule() {
 
 	new_policy=$(mktemp -p "$g_mountpoint")
 	echo "$1" > "$new_policy"
-	echo "$new_policy" > /sys/kernel/security/ima/policy
-	result=$?
-	rm -f "$new_policy"
-
-	if [ "$result" -ne 0 ]; then
+	if ! echo "$new_policy" > /sys/kernel/security/ima/policy; then
+		rm -f "$new_policy"
 		echo "${RED}Failed to set IMA policy${NORM}"
 		return "$HARDFAIL"
 	fi
+	rm -f "$new_policy"
 
 	return "$OK"
 }
diff --git a/tests/portable_signatures.test b/tests/portable_signatures.test
index 9f3339b..7ddd149 100755
--- a/tests/portable_signatures.test
+++ b/tests/portable_signatures.test
@@ -80,7 +80,6 @@ METADATA_CHANGE_FOWNER_2=3002
 
 check_load_ima_rule() {
 	local rule_loaded
-	local result
 	local new_policy
 
 	rule_loaded=$(grep "$1" /sys/kernel/security/ima/policy)
@@ -88,14 +87,12 @@ check_load_ima_rule() {
 		new_policy=$(mktemp -p "$g_mountpoint")
 		echo "$1" > "$new_policy"
 		evmctl sign -o -a sha256 --imasig --key "$key_path" "$new_policy" &> /dev/null
-		echo "$new_policy" > /sys/kernel/security/ima/policy
-		result=$?
-		rm -f "$new_policy"
-
-		if [ "$result" -ne 0 ]; then
+		if ! echo "$new_policy" > /sys/kernel/security/ima/policy; then
+			rm -f "$new_policy"
 			echo "${RED}Failed to set IMA policy${NORM}"
 			return "$FAIL"
 		fi
+		rm -f "${new_policy}"
 	fi
 
 	return "$OK"
-- 
2.43.0