166 	if (out.flags & (ISSEEK | ISPIPE)) {  in pos_out()
168 		if (lseek(out.fd, seek_offset(&out), SEEK_CUR) == -1 &&  in pos_out()
170 			err(1, "%s", out.name);  in pos_out()
175 	if (out.offset < 0)  in pos_out()
179 	if (out.flags & NOREAD) {  in pos_out()
181 		t_op.mt_count = out.offset;  in pos_out()
183 		if (ioctl(out.fd, MTIOCTOP, &t_op) == -1)  in pos_out()
184 			err(1, "%s", out.name);  in pos_out()
189 	for (cnt = 0; cnt < out.offset; ++cnt) {  in pos_out()
190 		if ((n = read(out.fd, out.db, out.dbsz)) > 0)  in pos_out()
194 			err(1, "%s", out.name);  in pos_out()
203 		if (ioctl(out.fd, MTIOCTOP, &t_op) == -1)  in pos_out()
204 			err(1, "%s", out.name);  in pos_out()
206 		while (cnt++ < out.offset) {  in pos_out()
207 			n = write(out.fd, out.db, out.dbsz);  in pos_out()
209 				err(1, "%s", out.name);  in pos_out()
210 			if (n != out.dbsz)  in pos_out()
211 				errx(1, "%s: write failure", out.name);  in pos_out()