475 rst_seekdir(RST_DIR *rdirp, long loc, long base)  in rst_seekdir()  argument
478 	if (loc == rst_telldir(rdirp))  in rst_seekdir()
484 	(void) lseek(rdirp->dd_fd, base + (loc & ~(DIRBLKSIZ - 1)), SEEK_SET);  in rst_seekdir()
485 	rdirp->dd_loc = loc & (DIRBLKSIZ - 1);  in rst_seekdir()
486 	if (rdirp->dd_loc != 0)  in rst_seekdir()
487 		rdirp->dd_size = read(rdirp->dd_fd, rdirp->dd_buf, DIRBLKSIZ);  in rst_seekdir()
494 rst_readdir(RST_DIR *rdirp)  in rst_readdir()  argument
499 		if (rdirp->dd_loc == 0) {  in rst_readdir()
500 			rdirp->dd_size = read(rdirp->dd_fd, rdirp->dd_buf,  in rst_readdir()
502 			if (rdirp->dd_size <= 0) {  in rst_readdir()
507 		if (rdirp->dd_loc >= rdirp->dd_size) {  in rst_readdir()
508 			rdirp->dd_loc = 0;  in rst_readdir()
511 		dp = (struct direct *)(rdirp->dd_buf + rdirp->dd_loc);  in rst_readdir()
513 		    dp->d_reclen > DIRBLKSIZ + 1 - rdirp->dd_loc) {  in rst_readdir()
518 		rdirp->dd_loc += dp->d_reclen;  in rst_readdir()
537 	RST_DIR *rdirp;  in rst_opendir()  local
542 		rdirp = opendirfile(dirfile);  in rst_opendir()
543 		rst_seekdir(rdirp, itp->t_seekpt, itp->t_seekpt);  in rst_opendir()
544 		return (rdirp);  in rst_opendir()
553 rst_closedir(RST_DIR *rdirp)  in rst_closedir()  argument
556 	(void)close(rdirp->dd_fd);  in rst_closedir()
557 	free(rdirp);  in rst_closedir()
565 rst_telldir(RST_DIR *rdirp)  in rst_telldir()  argument
567 	return ((long)lseek(rdirp->dd_fd,  in rst_telldir()
568 	    (off_t)0, SEEK_CUR) - rdirp->dd_size + rdirp->dd_loc);  in rst_telldir()
577 	RST_DIR *rdirp;  in opendirfile()  local
582 	if ((rdirp = malloc(sizeof(RST_DIR))) == NULL) {  in opendirfile()
586 	rdirp->dd_fd = fd;  in opendirfile()
587 	rdirp->dd_loc = 0;  in opendirfile()
588 	return (rdirp);  in opendirfile()