Method open

util-unix.cpp:63–94

}

void	temp_fstream::open (std::ios_base::openmode mode)
{
	close();

	const char*		tmpdir = getenv("TMPDIR");
	size_t			tmpdir_len = tmpdir ? std::strlen(tmpdir) : 0;
	if (tmpdir_len == 0 || tmpdir_len > 4096) {
		// no $TMPDIR or it's excessively long => fall back to /tmp
		tmpdir = "/tmp";
		tmpdir_len = 4;
	}
	std::vector<char>	path_buffer(tmpdir_len + 18);
	char*			path = &path_buffer[0];
	std::strcpy(path, tmpdir);
	std::strcpy(path + tmpdir_len, "/git-crypt.XXXXXX");
	mode_t			old_umask = umask(0077);
	int			fd = mkstemp(path);
	if (fd == -1) {
		int		mkstemp_errno = errno;
		umask(old_umask);
		throw System_error("mkstemp", "", mkstemp_errno);
	}
	umask(old_umask);
	std::fstream::open(path, mode);
	if (!std::fstream::is_open()) {
		unlink(path);
		::close(fd);
		throw System_error("std::fstream::open", path, 0);
	}
	unlink(path);
	::close(fd);
}

void	temp_fstream::close ()
{