added command to list directory into file

bsp_q7s/core/CoreController.cpp

@@ -109,6 +109,59 @@ ReturnValue_t CoreController::sdCardSetup(SdCardManager& sdcMan,
     }
 }
 
+ReturnValue_t CoreController::executeAction(ActionId_t actionId, MessageQueueId_t commandedBy,
+        const uint8_t *data, size_t size) {
+    switch(actionId) {
+    case(LIST_DIRECTORY_INTO_FILE): {
+        // TODO: Packet definition for clean deserialization
+        // Two bytes for a and R flag, at least 5 bytes for minimum valid path /tmp with
+        // null termination
+        if(size < 7) {
+            return HasActionsIF::INVALID_PARAMETERS;
+        }
+        // This flag specifies to run ls with -a
+        bool aFlag = data[0];
+        data += 1;
+        // This flag specifies to run ls with -R
+        bool RFlag = data[1];
+        data += 1;
+
+        size_t remainingSize = size - 2;
+        // One larger for null termination, which prevents undefined behaviour if the sent
+        // string is not 0 terminated
+        std::vector<uint8_t> repoAndTargetFileBuffer(remainingSize + 1, 0);
+        std::memcpy(repoAndTargetFileBuffer.data(), data, remainingSize);
+        const char* currentCharPtr = reinterpret_cast<const char*>(repoAndTargetFileBuffer.data());
+        // Full target file name
+        std::string repoName(currentCharPtr);
+        size_t repoLength = repoName.length();
+        // The other string needs to be at least one letter plus NULL termination to be valid at all
+        // The first string also needs to be NULL terminated, but the termination is not included
+        // in the string length, so this is subtracted from the remaining size as well
+        if(repoLength > remainingSize - 3) {
+            return HasActionsIF::INVALID_PARAMETERS;
+        }
+        // The file length will not include the NULL termination, so we skip it
+        currentCharPtr += repoLength + 1;
+        std::string targetFileName(currentCharPtr);
+        std::ostringstream oss;
+        oss << "ls -l";
+        if(aFlag) {
+            oss << "a";
+        }
+        if(RFlag) {
+            oss << "R";
+        }
+        oss << " " << repoName << " > " << targetFileName;
+        std::system(oss.str().c_str());
+        return HasReturnvaluesIF::RETURN_OK;
+    }
+    default: {
+        return HasActionsIF::INVALID_ACTION_ID;
+    }
+    }
+}
+
 ReturnValue_t CoreController::sdCardColdRedundantInit(SdCardManager* sdcMan,
         SdCardManager::SdStatusPair& statusPair) {
     sd::SdCard preferredSdCard = sd::SdCard::SLOT_0;