138 	Sfoff_t		cur;
139 	Sfoff_t		end;
153 static Sfoff_t
154 tailpos(register Sfio_t* fp, register Sfoff_t number, int delim)  in tailpos()
157 	register Sfoff_t	offset;  in tailpos()
158 	register Sfoff_t	first;  in tailpos()
159 	register Sfoff_t	last;  in tailpos()
165 	if ((first = sfseek(fp, (Sfoff_t)0, SEEK_CUR)) < 0)  in tailpos()
201 pipetail(Sfio_t* infile, Sfio_t* outfile, Sfoff_t number, int delim)  in pipetail()
204 	register Sfoff_t	n;  in pipetail()
205 	register Sfoff_t	nleft = number;  in pipetail()
208 	Sfoff_t			offset[2];  in pipetail()
222 			sfseek(out, (Sfoff_t)0, SEEK_SET);  in pipetail()
231 	sfseek(tmp[0], (Sfoff_t)0, SEEK_SET);  in pipetail()
239 		sfseek(tmp[1], (Sfoff_t)0, SEEK_SET);  in pipetail()
257 init(Tail_t* tp, Sfoff_t number, int delim, int flags, const char** format)  in init()
259 	Sfoff_t		offset;  in init()
293 				offset = sfseek(tp->sp, (Sfoff_t)0, SEEK_CUR);  in init()
322 				sfseek(op, (Sfoff_t)0, SEEK_SET);  in init()
323 				rev_line(op, sfstdout, (Sfoff_t)0);  in init()
415 	Sfoff_t			offset;  in b_tail()
416 	Sfoff_t			number = DEFAULT;  in b_tail()
740 					rev_line(ip, sfstdout, sfseek(ip, (Sfoff_t)0, SEEK_CUR));  in b_tail()
763 						sfseek(op, (Sfoff_t)0, SEEK_SET);  in b_tail()
764 						rev_line(op, sfstdout, (Sfoff_t)0);  in b_tail()