usr.sbin/boot0cfg/boot0cfg.c

121     u_int8_t *mbr, *boot0;
195     /* open the disk and read in the existing mbr. Either here or
199     mbr_size = read_mbr(disk, &mbr, !B_flag);
203 	write_mbr(fpath, O_CREAT | O_TRUNC, mbr, mbr_size);
213         memcpy(boot0 + OFF_PTBL, mbr + OFF_PTBL,
216 	    memcpy(boot0 + OFF_SERIAL, mbr + OFF_SERIAL, 4);
218 	boot0 = mbr;
266     if (mbr != boot0)
268     free(mbr);
278 set_bell(u_int8_t *mbr, int new_bell, int report)
285 	if (mbr[ofs] != seq[0])	/* search initial pattern */
289 		c = mbr[ofs+1];
291 		    mbr[ofs+1] = c = new_bell;
297 	    if (seq[i] != 0x100 && seq[i] != mbr[ofs+i])
310 read_mbr(const char *disk, u_int8_t **mbr, int check_version)
331 	if ((*mbr = malloc(mbr_size)) == NULL)
334 	    (n = read(fd, *mbr, mbr_size)) == -1)
341     if ((*mbr = malloc(sizeof(buf))) == NULL)
343     memcpy(*mbr, buf, sizeof(buf));
372  * Write out the mbr to the specified file.
375 write_mbr(const char *fname, int flags, u_int8_t *mbr, int mbr_size)
385 		n = write(fd, mbr, mbr_size);
418 		gctl_ro_param(grq, "bootcode", mbr_size, mbr);
430 		gctl_ro_param(grq, "data", mbr_size, mbr);
444 display_mbr(u_int8_t *mbr)
449     part = (struct dos_partition *)(mbr + DOSPARTOFF);
460     version = boot0version(mbr);
462 	version >> 8, version & 0xff, mbr[OFF_DRIVE],
463 	mbr[OFF_FLAGS] & 0xf, cv2(mbr + OFF_TICKS));
464     set_bell(mbr, 0, 1);
469 	if (!(mbr[OFF_FLAGS] & 1 << (7 - i)) ^ opttbl[i].def)
476 		mbr[OFF_SERIAL], mbr[OFF_SERIAL+1],
477 		mbr[OFF_SERIAL+2], mbr[OFF_SERIAL+3]);
478     printf("default_selection=F%d (", mbr[OFF_OPT] + 1);
479     if (mbr[OFF_OPT] < 4)
480 	printf("Slice %d", mbr[OFF_OPT] + 1);
481     else if (mbr[OFF_OPT] == 4)