Function importFile

src/test/examples/testlo.c:33–75

* importFile - * import file "in_filename" into database as large object "lobjOid" * */

 *
 */
static Oid
importFile(PGconn *conn, char *filename)
{
	Oid			lobjId;
	int			lobj_fd;
	char		buf[BUFSIZE];
	int			nbytes,
				tmp;
	int			fd;

	/*
	 * open the file to be read in
	 */
	fd = open(filename, O_RDONLY, 0666);
	if (fd < 0)
	{							/* error */
		fprintf(stderr, "cannot open unix file\"%s\"\n", filename);
	}

	/*
	 * create the large object
	 */
	lobjId = lo_creat(conn, INV_READ | INV_WRITE);
	if (lobjId == 0)
		fprintf(stderr, "cannot create large object");

	lobj_fd = lo_open(conn, lobjId, INV_WRITE);

	/*
	 * read in from the Unix file and write to the inversion file
	 */
	while ((nbytes = read(fd, buf, BUFSIZE)) > 0)
	{
		tmp = lo_write(conn, lobj_fd, buf, nbytes);
		if (tmp < nbytes)
			fprintf(stderr, "error while reading \"%s\"", filename);
	}

	close(fd);
	lo_close(conn, lobj_fd);

	return lobjId;
}

static void
pickout(PGconn *conn, Oid lobjId, int start, int len)