diff options
Diffstat (limited to 'sbin/fdisk/mbr.c')
| -rw-r--r-- | sbin/fdisk/mbr.c | 49 |
1 files changed, 46 insertions, 3 deletions
diff --git a/sbin/fdisk/mbr.c b/sbin/fdisk/mbr.c index b19718bd182..da458a81159 100644 --- a/sbin/fdisk/mbr.c +++ b/sbin/fdisk/mbr.c @@ -1,4 +1,4 @@ -/* $OpenBSD: mbr.c,v 1.6 1997/10/21 22:49:33 provos Exp $ */ +/* $OpenBSD: mbr.c,v 1.7 1998/09/14 03:54:35 rahnds Exp $ */ /* * Copyright (c) 1997 Tobias Weingartner @@ -45,9 +45,52 @@ #include "mbr.h" #include "part.h" +MBR_init(disk_t *disk, mbr_t *mbr) +{ + /* Fix up given mbr for this disk */ + mbr->part[0].flag = 0; + mbr->part[1].flag = 0; + mbr->part[2].flag = 0; + + mbr->part[3].flag = DOSACTIVE; + mbr->signature = DOSMBR_SIGNATURE; + + /* Use whole disk, save for first head, on first cyl. */ + mbr->part[3].id = DOSPTYP_OPENBSD; + mbr->part[3].scyl = 0; + mbr->part[3].shead = 1; + mbr->part[3].ssect = 1; + + /* Go right to the end */ + mbr->part[3].ecyl = disk->real->cylinders - 1; + mbr->part[3].ehead = disk->real->heads - 1; + mbr->part[3].esect = disk->real->sectors; + + /* Fix up start/length fields */ + PRT_fix_BN(disk, &mbr->part[3]); + +#if defined(__powerpc__) + /* Now fix up for the MS-DOS boot partition on PowerPC. */ + mbr->part[0].flag = DOSACTIVE; /* Boot from dos part */ + mbr->part[3].flag = 0; + mbr->part[3].ns += mbr->part[3].bs; + mbr->part[3].bs = mbr->part[0].bs + mbr->part[0].ns; + mbr->part[3].ns -= mbr->part[3].bs; + PRT_fix_CHS(disk, &mbr->part[3]); + if ((mbr->part[3].shead != 1) || (mbr->part[3].ssect != 1)) { + /* align the parition on a cylinder boundary */ + mbr->part[3].shead = 0; + mbr->part[3].ssect = 1; + mbr->part[3].scyl += 1; + } + /* Fix up start/length fields */ + PRT_fix_BN(disk, &mbr->part[3]); +#endif +} void -MBR_parse(mbr_buf, offset, reloff, mbr) +MBR_parse(disk, mbr_buf, offset, reloff, mbr) + disk_t *disk; char *mbr_buf; off_t offset; off_t reloff; @@ -63,7 +106,7 @@ MBR_parse(mbr_buf, offset, reloff, mbr) mbr->signature = getshort(&mbr_buf[MBR_SIG_OFF]); for (i = 0; i < NDOSPART; i++) - PRT_parse(&mbr_buf[MBR_PART_OFF + MBR_PART_SIZE * i], + PRT_parse(disk, &mbr_buf[MBR_PART_OFF + MBR_PART_SIZE * i], offset, reloff, &mbr->part[i]); } |