fs/FileInfo: new library providing GetFileInfo()

Replaces StatFile(), with a portable data object.

src/fs/CheckFile.cxx

@@ -21,7 +21,7 @@
 #include "CheckFile.hxx"
 #include "Log.hxx"
 #include "config/ConfigError.hxx"
-#include "FileSystem.hxx"
+#include "FileInfo.hxx"
 #include "Path.hxx"
 #include "AllocatedPath.hxx"
 #include "DirectoryReader.hxx"
@@ -32,15 +32,15 @@
 void
 CheckDirectoryReadable(Path path_fs)
 {
-	struct stat st;
-	if (!StatFile(path_fs, st)) {
-		FormatErrno(config_domain,
-			    "Failed to stat directory \"%s\"",
-			    path_fs.c_str());
+	Error error;
+
+	FileInfo fi;
+	if (!GetFileInfo(path_fs, fi, error)) {
+		LogError(error);
 		return;
 	}
 
-	if (!S_ISDIR(st.st_mode)) {
+	if (!fi.IsDirectory()) {
 		FormatError(config_domain,
 			    "Not a directory: %s", path_fs.c_str());
 		return;
@@ -49,7 +49,7 @@ CheckDirectoryReadable(Path path_fs)
 #ifndef WIN32
 	const auto x = AllocatedPath::Build(path_fs,
 					    PathTraitsFS::CURRENT_DIRECTORY);
-	if (!StatFile(x, st) && errno == EACCES)
+	if (!GetFileInfo(x, fi) && errno == EACCES)
 		FormatError(config_domain,
 			    "No permission to traverse (\"execute\") directory: %s",
 			    path_fs.c_str());