Method open

Sming/Libraries/Spiffs/src/FileSystem.cpp:268–313

}

FileHandle FileSystem::open(const char* path, OpenFlags flags)
{
	if(isRootPath(path)) {
		return Error::BadParam;
	}

	/*
	 * The file may be marked 'read-only' in its metadata, so avoid modifications
	 * (truncate) during the open phase until this has been checked.
	 */

	spiffs_flags sflags;
	if(mapFileOpenFlags(flags - OpenFlag::Truncate, sflags).any()) {
		return FileHandle(Error::NotSupported);
	}

	auto file = SPIFFS_open(handle(), path, sflags, 0);
	if(file < 0) {
		int err = translateSpiffsError(file);
		debug_ifserr(err, "open('%s')", path);
		return err;
	}

	auto smb = initMetaBuffer(file);
	// If file is marked read-only, fail write requests
	if(smb != nullptr) {
		if(flags[OpenFlag::Write] && smb->meta.attr[FileAttribute::ReadOnly]) {
			SPIFFS_close(handle(), file);
			return Error::ReadOnly;
		}
	}

	// Now truncate the file if so requested
	if(flags[OpenFlag::Truncate]) {
		int err = SPIFFS_ftruncate(handle(), file, 0);
		if(err < 0) {
			SPIFFS_close(handle(), file);
			return translateSpiffsError(err);
		}

		// Update modification timestamp
		touch(file);
	}

	return file;
}

int FileSystem::close(FileHandle file)
{