lib: fs: implement mounting filesystems; reading, writing from files

lib/libfs/status.c

@@ -0,0 +1,25 @@
+#include <errno.h>
+#include <fs/status.h>
+
+int fs_status_to_errno(enum fs_status status)
+{
+	switch (status) {
+	case FS_SUCCESS:
+		return SUCCESS;
+	case FS_ERR_NO_ENTRY:
+		return ENOENT;
+	case FS_ERR_NO_MEMORY:
+		return ENOMEM;
+	case FS_ERR_INVALID_ARGUMENT:
+		return EINVAL;
+	case FS_ERR_NOT_IMPLEMENTED:
+		return ENOSYS;
+	case FS_ERR_IS_DIRECTORY:
+		return EISDIR;
+	case FS_ERR_NOT_DIRECTORY:
+		return ENOTDIR;
+
+	default:
+		return EINVAL;
+	}
+}