Merge pull request 'uio able to resolve symlinks now' (#709) from eive/fsfw:mueller/uio_mapper_handle_symlinks into development

Reviewed-on: fsfw/fsfw#709

CHANGELOG.md

@@ -24,6 +24,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## Added
 
+- `UioMapper` is able to resolve symlinks now.
+  PR: https://egit.irs.uni-stuttgart.de/fsfw/fsfw/pulls/709
 - Add new `UnsignedByteField` class
   PR: https://egit.irs.uni-stuttgart.de/fsfw/fsfw/pulls/660
 

CMakeLists.txt

@@ -346,9 +346,15 @@ if(FSFW_BUILD_TESTS)
           DEPENDENCIES ${FSFW_TEST_TGT})
       else()
         setup_target_for_coverage_lcov(
-          NAME ${FSFW_TEST_TGT}_coverage EXECUTABLE ${FSFW_TEST_TGT}
-          DEPENDENCIES ${FSFW_TEST_TGT}
-          GENHTML_ARGS --html-epilog ${CMAKE_SOURCE_DIR}/unittests/lcov_epilog.html)
+          NAME
+          ${FSFW_TEST_TGT}_coverage
+          EXECUTABLE
+          ${FSFW_TEST_TGT}
+          DEPENDENCIES
+          ${FSFW_TEST_TGT}
+          GENHTML_ARGS
+          --html-epilog
+          ${CMAKE_SOURCE_DIR}/unittests/lcov_epilog.html)
       endif()
     endif()
   endif()

src/fsfw/storagemanager/StorageManagerIF.h

@@ -181,7 +181,8 @@ class StorageManagerIF {
    * @return	Returns @returnvalue::OK if data was added.
    * 		@returnvalue::FAILED if data could not be added, storageId is unchanged then.
    */
-  virtual ReturnValue_t getFreeElement(store_address_t* storageId, size_t size, uint8_t** dataPtr) = 0;
+  virtual ReturnValue_t getFreeElement(store_address_t* storageId, size_t size,
+                                       uint8_t** dataPtr) = 0;
 
   [[nodiscard]] virtual bool hasDataAtId(store_address_t storeId) const = 0;
 

src/fsfw_hal/linux/uio/UioMapper.cpp

@@ -1,6 +1,7 @@
 #include "UioMapper.h"
 
 #include <fcntl.h>
+#include <sys/stat.h>
 #include <unistd.h>
 
 #include <filesystem>
@@ -13,7 +14,23 @@ const char UioMapper::UIO_PATH_PREFIX[] = "/sys/class/uio/";
 const char UioMapper::MAP_SUBSTR[] = "/maps/map";
 const char UioMapper::SIZE_FILE_PATH[] = "/size";
 
-UioMapper::UioMapper(std::string uioFile, int mapNum) : uioFile(uioFile), mapNum(mapNum) {}
+UioMapper::UioMapper(std::string uioFile, int mapNum) : mapNum(mapNum) {
+  struct stat buf;
+  lstat(uioFile.c_str(), &buf);
+  if (S_ISLNK(buf.st_mode)) {
+    char* res = realpath(uioFile.c_str(), nullptr);
+    if (res) {
+      this->uioFile = res;
+      free(res);
+    } else {
+#if FSFW_CPP_OSTREAM_ENABLED == 1
+      sif::error << "Could not resolve real path of UIO file " << uioFile << std::endl;
+#endif
+    }
+  } else {
+    this->uioFile = std::move(uioFile);
+  }
+}
 
 UioMapper::~UioMapper() {}
 
@@ -22,7 +39,7 @@ ReturnValue_t UioMapper::getMappedAdress(uint32_t** address, Permissions permiss
   int fd = open(uioFile.c_str(), O_RDWR);
   if (fd < 1) {
 #if FSFW_CPP_OSTREAM_ENABLED == 1
-    sif::error << "PtmeAxiConfig::initialize: Invalid UIO device file" << std::endl;
+    sif::error << "UioMapper::getMappedAdress: Invalid UIO device file " << uioFile << std::endl;
 #endif
     return returnvalue::FAILED;
   }

unittests/hal/CMakeLists.txt

@@ -1,7 +1,5 @@
 target_sources(${FSFW_TEST_TGT} PRIVATE testHostFilesystem.cpp testFsMock.cpp)
 
 if(UNIX)
-  target_sources(${FSFW_TEST_TGT} PRIVATE
-	  testCommandExecutor.cpp
-  )
+  target_sources(${FSFW_TEST_TGT} PRIVATE testCommandExecutor.cpp)
 endif()