C++ (Cpp) dev_create_file Examples

Example #1

File: config.c Project: andyvand/cyglvm2

int config_file_read(struct dm_config_tree *cft)
{
	const char *filename = NULL;
	struct config_file *cf = dm_config_get_custom(cft);
	struct stat info;
	int r;

	if (!config_file_check(cft, &filename, &info))
		return_0;

	/* Nothing to do.  E.g. empty file. */
	if (!filename)
		return 1;

	if (!cf->dev) {
		if (!(cf->dev = dev_create_file(filename, NULL, NULL, 1)))
			return_0;

		if (!dev_open_readonly_buffered(cf->dev))
			return_0;
	}

	r = config_file_read_fd(cft, cf->dev, 0, (size_t) info.st_size, 0, 0,
				(checksum_fn_t) NULL, 0);

	if (!cf->keep_open) {
		if (!dev_close(cf->dev))
			stack;
		cf->dev = NULL;
	}

	return r;
}

Example #2

File: log.c Project: Distrotech/LVM2

void init_log_direct(const char *log_file, int append)
{
	int open_flags = append ? 0 : O_TRUNC;

	dev_create_file(log_file, &_log_dev, &_log_dev_alias, 1);
	if (!dev_open_flags(&_log_dev, O_RDWR | O_CREAT | open_flags, 1, 0))
		return;

	_log_direct = 1;
}

Example #3

File: config.c Project: inteos/WBSAirback

int read_config_file(struct config_tree *cft)
{
	struct cs *c = (struct cs *) cft;
	struct stat info;
	int r = 1;

	if (stat(c->filename, &info)) {
		log_sys_error("stat", c->filename);
		c->exists = 0;
		return 0;
	}

	if (!S_ISREG(info.st_mode)) {
		log_error("%s is not a regular file", c->filename);
		c->exists = 0;
		return 0;
	}

	c->exists = 1;

	if (info.st_size == 0) {
		log_verbose("%s is empty", c->filename);
		return 1;
	}

	if (!c->dev) {
		if (!(c->dev = dev_create_file(c->filename, NULL, NULL, 1)))
			return_0;

		if (!dev_open_readonly_buffered(c->dev)) {
			c->dev = 0;
			return_0;
		}
	}

	r = read_config_fd(cft, c->dev, 0, (size_t) info.st_size, 0, 0,
			   (checksum_fn_t) NULL, 0);

	if (!c->keep_open) {
		dev_close(c->dev);
		c->dev = 0;
	}

	c->timestamp = info.st_ctime;
	c->st_size = info.st_size;

	return r;
}