Function createDirectory

flow/Platform.actor.cpp:2390–2448

namespace platform {

bool createDirectory(std::string const& directory) {
	INJECT_FAULT(platform_error, "createDirectory"); // create dir failed

#ifdef _WIN32
	if (CreateDirectory(directory.c_str(), nullptr)) {
		createdDirectory();
		return true;
	}
	if (GetLastError() == ERROR_ALREADY_EXISTS)
		return false;
	if (GetLastError() == ERROR_PATH_NOT_FOUND) {
		size_t delim = directory.find_last_of("/\\");
		if (delim != std::string::npos) {
			createDirectory(directory.substr(0, delim));
			return createDirectory(directory);
		}
	}
	Error e = systemErrorCodeToError();
	TraceEvent(SevError, "CreateDirectory").error(e).detail("Directory", directory).GetLastError();
	throw e;
#elif (defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__))
	size_t sep = 0;
	do {
		sep = directory.find_first_of('/', sep + 1);
		if (mkdir(directory.substr(0, sep).c_str(), 0755) != 0) {
			if (errno == EEXIST)
				continue;
			auto mkdirErrno = errno;

			// check if directory already exists
			// necessary due to old kernel bugs
			struct stat s;
			const char* dirname = directory.c_str();
			if (stat(dirname, &s) != -1 && S_ISDIR(s.st_mode)) {
				TraceEvent("DirectoryAlreadyExists").detail("Directory", dirname).detail("IgnoredError", mkdirErrno);
				continue;
			}

			Error e;
			if (mkdirErrno == EACCES) {
				e = file_not_writable();
			} else {
				e = systemErrorCodeToError();
			}

			TraceEvent(SevError, "CreateDirectory")
			    .error(e)
			    .detail("Directory", directory)
			    .detailf("UnixErrorCode", "%x", errno)
			    .detail("UnixError", strerror(mkdirErrno));
			throw e;
		}
		createdDirectory();
	} while (sep != std::string::npos && sep != directory.length() - 1);
	return true;
#else
#error Port me!
#endif