C++ (Cpp) install_service_fd示例

示例#1

文件： image.c 项目： Open-Party/criu

int open_image_dir(char *dir)
{
	int fd, ret;

	fd = open(dir, O_RDONLY);
	if (fd < 0) {
		pr_perror("Can't open dir %s", dir);
		return -1;
	}

	ret = install_service_fd(IMG_FD_OFF, fd);
	close(fd);
	fd = ret;

	if (opts.img_parent) {
		ret = symlinkat(opts.img_parent, fd, CR_PARENT_LINK);
		if (ret < 0 && errno != EEXIST) {
			pr_perror("Can't link parent snapshot");
			goto err;
		}
	}

	return 0;

err:
	close_image_dir();
	return -1;
}

示例#2

文件： image.c 项目： hqhq/criu

int open_image_dir(char *dir)
{
	int fd, ret;

	fd = open(dir, O_RDONLY);
	if (fd < 0) {
		pr_perror("Can't open dir %s", dir);
		return -1;
	}

	ret = install_service_fd(IMG_FD_OFF, fd);
	close(fd);
	fd = ret;

	if (opts.img_parent) {
		ret = symlinkat(opts.img_parent, fd, CR_PARENT_LINK);
		if (ret < 0 && errno != EEXIST) {
			pr_perror("Can't link parent snapshot");
			goto err;
		}

		if (opts.img_parent[0] == '/')
			pr_warn("Absolute paths for parent links "
					"may not work on restore!\n");
	}

	return 0;

err:
	close_image_dir();
	return -1;
}

示例#3

文件： log.c 项目： avagin/crtools

int log_init(const char *output)
{
	int new_logfd, fd;

	gettimeofday(&start, NULL);
	buf_off = TS_BUF_OFF;

	if (output) {
		new_logfd = open(output, O_CREAT|O_TRUNC|O_WRONLY|O_APPEND, 0600);
		if (new_logfd < 0) {
			pr_perror("Can't create log file %s", output);
			return -1;
		}
	} else {
		new_logfd = dup(DEFAULT_LOGFD);
		if (new_logfd < 0) {
			pr_perror("Can't dup log file");
			return -1;
		}
	}

	fd = install_service_fd(LOG_FD_OFF, new_logfd);
	close(new_logfd);
	if (fd < 0)
		goto err;

	return 0;

err:
	pr_perror("Log engine failure, can't duplicate descriptor");
	return -1;
}

示例#4

文件： image.c 项目： shawnl/crtools

int open_image_dir(char *dir)
{
	int fd, ret;

	fd = open(dir, O_RDONLY);
	if (fd < 0) {
		pr_perror("Can't open dir %s", dir);
		return -1;
	}

	ret = install_service_fd(IMG_FD_OFF, fd);

	if (opts.img_parent) {
		int pfd;

		ret = symlinkat(opts.img_parent, fd, CR_PARENT_LINK);
		if (ret < 0) {
			pr_perror("Can't link parent snapshot.");
			goto err;
		}

		pfd = openat(fd, CR_PARENT_LINK, O_RDONLY);
		if (pfd < 0) {
			pr_perror("Can't open parent snapshot.");
			goto err;
		}

		ret = install_service_fd(PARENT_FD_OFF, pfd);

		close(pfd);
	}

	close(fd);

	return ret;

err:
	close_image_dir();
	return -1;
}

示例#5

文件： image.c 项目： kunalkushwaha/crtools

int open_image_dir(void)
{
	int fd, ret;

	fd = open(".", O_RDONLY);
	if (fd < 0) {
		pr_perror("Can't open cwd");
		return -1;
	}

	ret = install_service_fd(IMG_FD_OFF, fd);

	close(fd);

	if (opts.img_parent) {
		ret = symlink(opts.img_parent, CR_PARENT_LINK);
		if (ret < 0) {
			pr_perror("Can't link parent snapshot.");
			goto err;
		}

		fd = open(CR_PARENT_LINK, O_RDONLY);
		if (fd < 0) {
			pr_perror("Can't open parent snapshot.");
			goto err;
		}

		ret = install_service_fd(PARENT_FD_OFF, fd);

		close(fd);
	}

	return ret;

err:
	close_image_dir();
	return -1;
}

示例#6

文件： log.c 项目： cyrillos/criu

int log_init(const char *output)
{
	int new_logfd, fd;

	gettimeofday(&start, NULL);
	reset_buf_off();

	if (output && !strncmp(output, "-", 2)) {
		new_logfd = dup(STDOUT_FILENO);
		if (new_logfd < 0) {
			pr_perror("Can't dup stdout stream");
			return -1;
		}
	} else if (output) {
		new_logfd = open(output, O_CREAT|O_TRUNC|O_WRONLY|O_APPEND, 0600);
		if (new_logfd < 0) {
			pr_perror("Can't create log file %s", output);
			return -1;
		}
	} else {
		new_logfd = dup(DEFAULT_LOGFD);
		if (new_logfd < 0) {
			pr_perror("Can't dup log file");
			return -1;
		}
	}

	fd = install_service_fd(LOG_FD_OFF, new_logfd);
	if (fd < 0)
		goto err;

	print_versions();

	return 0;

err:
	pr_perror("Log engine failure, can't duplicate descriptor");
	return -1;
}