Method Init

glinject/SSRVideoStreamWriter.cpp:67–173

}

void SSRVideoStreamWriter::Init() {

	GLINJECT_PRINT("[" << m_filename_main << "] Created video stream.");

	bool relax_permissions = false;
	{
		char *ssr_stream_relax_permissions = getenv("SSR_STREAM_RELAX_PERMISSIONS");
		if(ssr_stream_relax_permissions != NULL && atoi(ssr_stream_relax_permissions) > 0) {
			GLINJECT_PRINT("Warning: Using relaxed file permissions, any user on this machine will be able to read or manipulate the stream!");
			relax_permissions = true;
		}
	}

	// create channel directory (permissions may be wrong because of umask, fix this later)
	if(mkdir(m_channel_directory.c_str(), (relax_permissions)? 0777 : 0700) == -1) {
		if(errno != EEXIST) { // does the directory already exist?
			GLINJECT_PRINT("Error: Can't create channel directory!");
			throw SSRStreamException();
		}
	}

	// check ownership and permissions
	struct stat statinfo;
	if(lstat(m_channel_directory.c_str(), &statinfo) == -1) {
		GLINJECT_PRINT("Error: Can't stat channel directory!");
		throw SSRStreamException();
	}
	if(!S_ISDIR(statinfo.st_mode) || S_ISLNK(statinfo.st_mode)) {
		GLINJECT_PRINT("Error: Channel directory is not a regular directory!");
		throw SSRStreamException();
	}
	if(statinfo.st_uid == geteuid()) {
		if(chmod(m_channel_directory.c_str(), (relax_permissions)? 0777 : 0700) == -1) {
			GLINJECT_PRINT("Error: Can't set channel directory mode!");
			throw SSRStreamException();
		}
	} else {
		if(!relax_permissions) {
			GLINJECT_PRINT("Error: Channel directory is owned by a different user! "
							"Choose a different channel name, or enable relaxed file permissions to use it anyway.");
			throw SSRStreamException();
		}
	}

	// open frame files
	for(unsigned int i = 0; i < GLINJECT_RING_BUFFER_SIZE; ++i) {
		FrameData &fd = m_frame_data[i];
		fd.m_fd_frame = open(fd.m_filename_frame.c_str(), O_RDWR | O_CREAT | O_EXCL | O_CLOEXEC, (relax_permissions)? 0666 : 0600);
		if(fd.m_fd_frame == -1) {
			GLINJECT_PRINT("Error: Can't open video frame file!");
			throw SSRStreamException();
		}
		if(fchmod(fd.m_fd_frame, (relax_permissions)? 0666 : 0600) == -1) {
			GLINJECT_PRINT("Error: Can't set video frame file mode!");
			throw SSRStreamException();
		}
	}