using _ instead of - now

hal/src/fsfw_hal/linux/UnixFileGuard.cpp

@@ -0,0 +1,33 @@
+#include "fsfw-hal/linux/UnixFileGuard.h"
+
+UnixFileGuard::UnixFileGuard(std::string device, int* fileDescriptor, int flags,
+        std::string diagnosticPrefix):
+        fileDescriptor(fileDescriptor) {
+    if(fileDescriptor == nullptr) {
+        return;
+    }
+    *fileDescriptor = open(device.c_str(), flags);
+    if (*fileDescriptor < 0) {
+#if FSFW_VERBOSE_LEVEL >= 1
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+        sif::warning << diagnosticPrefix <<"Opening device failed with error code " << errno <<
+                "." << std::endl;
+        sif::warning << "Error description: " << strerror(errno) << std::endl;
+#else
+        sif::printError("%sOpening device failed with error code %d.\n", diagnosticPrefix);
+        sif::printWarning("Error description: %s\n", strerror(errno));
+#endif /* FSFW_CPP_OSTREAM_ENABLED == 1 */
+#endif /* FSFW_VERBOSE_LEVEL >= 1 */
+        openStatus = OPEN_FILE_FAILED;
+    }
+}
+
+UnixFileGuard::~UnixFileGuard() {
+    if(fileDescriptor != nullptr) {
+        close(*fileDescriptor);
+    }
+}
+
+ReturnValue_t UnixFileGuard::getOpenResult() const {
+    return openStatus;
+}