[Tests] skip IPC test and example if improper ptrace value

We should definitely not change a sys file's value, within the test.
We also shouldn't count and/or use sudoless password - just skip.

Author: lplewa

examples/CMakeLists.txt

@@ -137,7 +137,10 @@ if(LINUX AND UMF_BUILD_LIBUMF_POOL_SCALABLE)
         COMMAND ${BASE_NAME}.sh
         WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
 
-    set_tests_properties(${EXAMPLE_NAME} PROPERTIES LABELS "example")
+    set_tests_properties(
+        ${EXAMPLE_NAME} PROPERTIES
+        SKIP_RETURN_CODE 125
+        LABELS "example")
 else()
     message(
         STATUS

examples/basic/ipc_shm_ipcapi.sh

@@ -20,19 +20,8 @@ VAL=0
 if [ -f $PTRACE_SCOPE_FILE ]; then
 	PTRACE_SCOPE_VAL=$(cat $PTRACE_SCOPE_FILE)
 	if [ $PTRACE_SCOPE_VAL -ne $VAL ]; then
-		# check if sudo requires password
-		if ! timeout --kill-after=5s 3s sudo date; then
-			echo "ERROR: sudo requires password - cannot set ptrace_scope to 0"
-			exit 1
-		fi
-		echo "Setting ptrace_scope to 0 (classic ptrace permissions) ..."
-		echo "$ sudo bash -c \"echo $VAL > $PTRACE_SCOPE_FILE\""
-		sudo bash -c "echo $VAL > $PTRACE_SCOPE_FILE"
-	fi
-	PTRACE_SCOPE_VAL=$(cat $PTRACE_SCOPE_FILE)
-	if [ $PTRACE_SCOPE_VAL -ne $VAL ]; then
-		echo "SKIP: setting ptrace_scope to 0 (classic ptrace permissions) FAILED - skipping the test"
-		exit 0
+		echo "SKIP: ptrace_scope is not set to 0 (classic ptrace permissions) - skipping the test"
+		exit 125 # skip code defined in CMakeLists.txt
 	fi
 fi
 

test/CMakeLists.txt

@@ -257,6 +257,7 @@ if(LINUX)
         WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
 
     set_tests_properties(${TEST_NAME} PROPERTIES LABELS "umf")
+    set_tests_properties(${TEST_NAME} PROPERTIES SKIP_RETURN_CODE 125)
 else()
     message(
         STATUS "IPC shared memory test is supported on Linux only - skipping")

test/ipc_os_prov.sh

@@ -20,19 +20,8 @@ VAL=0
 if [ -f $PTRACE_SCOPE_FILE ]; then
 	PTRACE_SCOPE_VAL=$(cat $PTRACE_SCOPE_FILE)
 	if [ $PTRACE_SCOPE_VAL -ne $VAL ]; then
-		# check if sudo requires password
-		if ! timeout --kill-after=5s 3s sudo date; then
-			echo "ERROR: sudo requires password - cannot set ptrace_scope to 0"
-			exit 1
-		fi
-		echo "Setting ptrace_scope to 0 (classic ptrace permissions) ..."
-		echo "$ sudo bash -c \"echo $VAL > $PTRACE_SCOPE_FILE\""
-		sudo bash -c "echo $VAL > $PTRACE_SCOPE_FILE"
-	fi
-	PTRACE_SCOPE_VAL=$(cat $PTRACE_SCOPE_FILE)
-	if [ $PTRACE_SCOPE_VAL -ne $VAL ]; then
-		echo "SKIP: setting ptrace_scope to 0 (classic ptrace permissions) FAILED - skipping the test"
-		exit 0
+		echo "SKIP: ptrace_scope is not set to 0 (classic ptrace permissions) - skipping the test"
+		exit 125 # skip code defined in CMakeLists.txt
 	fi
 fi