129 #define	TBLOCK	512	/* tape block size--should be universal */  macro
167 #define	TBLOCKS(bytes)	(((bytes) + TBLOCK - 1) / TBLOCK)
350 	char dummy[TBLOCK];
1676 	char buf[TBLOCK];  in passtape()
2384 		    (nblock * TBLOCK));  in putfile()
2386 			maxread = TBLOCK;  in putfile()
2391 		    read(infile, bigbuf, min((hint*TBLOCK), maxread))) > 0) &&  in putfile()
2395 			nblks = ((i-1)/TBLOCK)+1;  in putfile()
2594 	char buf[TBLOCK];  in splitfile()
2651 	s = (off_t)(blocklim - tapepos - 1) * TBLOCK;  in splitfile()
2658 				s = (off_t)(blocklim - 1)*TBLOCK; /* all */  in splitfile()
2673 		while (blocks && read(ifd, buf, TBLOCK) > 0) {  in splitfile()
3710 			char	buf[TBLOCK];  in doxtract()
3745 					if (bytes <= TBLOCK) {  in doxtract()
3751 						    TBLOCK);  in doxtract()
3752 						tp += TBLOCK;  in doxtract()
3754 					bytes -= TBLOCK;  in doxtract()
3898 	if (issysattr || (bytes <= TBLOCK)) {  in xblocks()
3913 			piosize = TBLOCK;  in xblocks()
3923 	if ((buf = malloc(TBLOCKS(maxwrite) * TBLOCK)) == NULL) {  in xblocks()
3934 		for (bytesread = 0; bytesread < maxwrite; bytesread += TBLOCK) {  in xblocks()
4158 #if SYS_BLOCK > TBLOCK  in dotable()
4159 		nblock = SYS_BLOCK / TBLOCK;  in dotable()
4309 	char buf[TBLOCK];  in putempty()
4312 	for (cp = buf; cp < &buf[TBLOCK]; )  in putempty()
4609 	bzero(dblock.dummy, TBLOCK);  in tomodes()
4672 	for (cp = dblockp->dummy; cp < &(dblockp->dummy[TBLOCK]); cp++)  in checksum_signed()
4695 	    cp < (unsigned char *) &(dblockp->dummy[TBLOCK]); cp++)  in checksum()
5065 #if SYS_BLOCK > TBLOCK  in seekdisk()
5080 #if SYS_BLOCK > TBLOCK  in seekdisk()
5081 	nxb = (blkcnt_t)(seekval % (off_t)(SYS_BLOCK / TBLOCK));  in seekdisk()
5088 	if (lseek(mt, (off_t)(TBLOCK * seekval), 1) == (off_t)-1) {  in seekdisk()
5093 #if SYS_BLOCK > TBLOCK  in seekdisk()
5098 		if (read(mt, tbuf, TBLOCK*nblock) < 0) {  in seekdisk()
5128 		if ((i = read(mt, tbuf, TBLOCK*j)) < 0) {  in readtape()
5151 		} else if ((!first || Bflag) && i != TBLOCK*j) {  in readtape()
5156 			int remaining = (TBLOCK * j) - i;  in readtape()
5172 			if ((i % TBLOCK) != 0) {  in readtape()
5177 			i /= TBLOCK;  in readtape()
5215 		i = write(mt, (char *)tbuf, TBLOCK*nblock);  in writetbuf()
5216 		if (i != TBLOCK*nblock)  in writetbuf()
5228 		i = (int)write(mt, buffer, TBLOCK*nblock);  in writetbuf()
5229 		if (i != TBLOCK*nblock)  in writetbuf()
5232 		buffer += (nblock * TBLOCK);  in writetbuf()
5236 		(void) memcpy((char *)&tbuf[recno++], buffer, TBLOCK);  in writetbuf()
5237 		buffer += TBLOCK;  in writetbuf()
5239 			i = (int)write(mt, (char *)tbuf, TBLOCK*nblock);  in writetbuf()
5240 			if (i != TBLOCK*nblock)  in writetbuf()
5283 		if (lseek(mt, (off_t)(TBLOCK*(tapepos-recno)), SEEK_SET) ==  in backtape()
5331 #if SYS_BLOCK > TBLOCK  in flushtape()
5340 			if ((i = recno % (SYS_BLOCK / TBLOCK)) != 0) {  in flushtape()
5350 		    (blkcnt_t)(NotTape ? recno : nblock) * TBLOCK);  in flushtape()
5352 		    (size_t)(NotTape ? recno : nblock) * TBLOCK) < 0) {  in flushtape()
5364 	(void) memcpy(dst, src, TBLOCK);  in copy()
5396 	return (kval * 1024 / TBLOCK);	/* convert to TBLOCKS */  in kcheck()
5412 	if ((bval <= 0) || (bval > INT_MAX / TBLOCK)) {  in bcheck()
5805 			while ((sz = read(mt, tbuf, TBLOCK*nblock)) > 0) {  in wantit()
5861 		st->st_size += TBLOCK + Xtarhdr.x_filesz;  in setbytes_to_skip()
6441 		(void) bcopy(dblock.dummy, xhdr_buf.dummy, TBLOCK);  in build_dblock()
6890 	bufneeded = nblocks * TBLOCK;  in get_xdata()
6902 		lineloc += TBLOCK;  in get_xdata()
7595 #define	ROUNDTOTBLOCK(a)	((a + (TBLOCK -1)) & ~(TBLOCK -1))
8235 	char		buf[TBLOCK];  in read_xattr_hdr()
8259 		if (bytes <= TBLOCK) {  in read_xattr_hdr()
8263 			(void) memcpy(tp, buf, TBLOCK);  in read_xattr_hdr()
8264 			tp += TBLOCK;  in read_xattr_hdr()
8266 		bytes -= TBLOCK;  in read_xattr_hdr()