diff options
Diffstat (limited to 'lib/libdisk/write_disk.c')
| -rw-r--r-- | lib/libdisk/write_disk.c | 158 |
1 files changed, 157 insertions, 1 deletions
diff --git a/lib/libdisk/write_disk.c b/lib/libdisk/write_disk.c index aa7190503a0b..f39c67df8154 100644 --- a/lib/libdisk/write_disk.c +++ b/lib/libdisk/write_disk.c @@ -6,7 +6,7 @@ * this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp * ---------------------------------------------------------------------------- * - * $Id$ + * $Id: write_disk.c,v 1.1 1995/04/29 07:21:14 phk Exp $ * */ @@ -25,10 +25,166 @@ #define DOSPTYP_EXTENDED 5 #define DOSPTYP_ONTRACK 84 +#define BBSIZE 8192 + +#define WHERE(offset,disk) (disk->flags & DISK_ON_TRACK ? offset + 63 : offset) +int +Write_FreeBSD(int fd, struct disk *new, struct disk *old, struct chunk *c1) +{ + struct disklabel *dl; + struct chunk *c2; + int i,j; + void *p; + u_char buf[BBSIZE]; + + for(i=0;i<BBSIZE/512;i++) { + p = read_block(fd,i + c1->offset); + memcpy(buf+512*i,p,512); + free(p); + } + if(new->boot1) + memcpy(buf,new->boot1,512); + + if(new->boot2) + memcpy(buf+512,new->boot2,BBSIZE-512); + + dl = (struct disklabel *) (buf+512*LABELSECTOR+LABELOFFSET); + memset(dl,0,sizeof *dl); + + printf("--> Write_FreeBSD()\n"); + + for(c2=c1->part;c2;c2=c2->next) { + if (c2->type == unused) continue; + if (c2->type == reserved) continue; + if (!strcmp(c2->name,"X")) continue; + j = c2->name[5] - 'a'; + if (j < 0 || j >= MAXPARTITIONS || j == RAW_PART) { + warn("Weird parititon letter %c",c2->name[5]); + continue; + } + dl->d_partitions[j].p_size = c2->size; + dl->d_partitions[j].p_offset = c2->offset - c1->offset; + + } + + dl->d_bbsize = BBSIZE; + + strcpy(dl->d_typename,c1->name); + + dl->d_secperunit = new->chunks->size; + dl->d_secpercyl = new->real_cyl ? new->real_cyl : new->bios_cyl; + dl->d_ntracks = new->real_hd ? new->real_hd : new->bios_hd; + dl->d_nsectors = new->real_sect ? new->real_sect : new->bios_sect; + + dl->d_npartitions = MAXPARTITIONS; + + dl->d_type = new->name[0] == 's' ? DTYPE_SCSI : DTYPE_ESDI; + dl->d_partitions[RAW_PART].p_size = c1->size; + dl->d_partitions[RAW_PART].p_offset = 0; + + dl->d_magic = DISKMAGIC; + dl->d_magic2 = DISKMAGIC; + dl->d_checksum = dkcksum(dl); + + for(i=0;i<BBSIZE/512;i++) { + write_block(fd,WHERE(i + c1->offset,new),buf+512*i); + } + + return 0; +} + +int +Write_Extended(int fd, struct disk *new, struct disk *old, struct chunk *c1) +{ + printf("--> Write_Extended()\n"); + Print_Chunk(c1); + return 0; +} int Write_Disk(struct disk *d1) { + int fd,i,j; + struct disk *old = 0; + struct chunk *c1; + int ret = 0; + char device[64]; + void *mbr; + struct dos_partition *dp; + int s[4]; + + strcpy(device,"/dev/r"); + strcat(device,d1->name); + + fd = open(device,O_RDWR); + if (fd < 0) { + warn("open(%s) failed",device); + return 1; + } + + memset(s,0,sizeof s); + mbr = read_block(fd,0); + dp = (struct dos_partition*) (mbr + DOSPARTOFF); + for (c1=d1->chunks->part; c1 ; c1 = c1->next) { + if (c1->type == unused) continue; + if (c1->type == reserved) continue; + if (!strcmp(c1->name,"X")) continue; + if (c1->type == extended) + ret += Write_Extended(fd, d1,old,c1); + if (c1->type == freebsd) + ret += Write_FreeBSD(fd, d1,old,c1); + j = c1->name[4] - '1'; + if (j < 0 || j > 3) + continue; + s[j]++; + dp[j].dp_start = c1->offset; + dp[j].dp_size = c1->size; + + i = c1->offset; + if (i >= 1024*d1->bios_sect*d1->bios_hd) + i = 1024*d1->bios_sect*d1->bios_hd - 1; + dp[j].dp_ssect = i % d1->bios_sect; + i -= dp[j].dp_ssect; + i /= d1->bios_sect; + dp[j].dp_ssect++; + dp[j].dp_shd = i % d1->bios_hd; + i -= dp[j].dp_shd; + i /= d1->bios_hd; + dp[j].dp_scyl = i; + + i = c1->end; + if (i >= 1024*d1->bios_sect*d1->bios_hd) + i = 1024*d1->bios_sect*d1->bios_hd - 1; + dp[j].dp_esect = i % d1->bios_sect; + i -= dp[j].dp_esect; + i /= d1->bios_sect; + dp[j].dp_esect++; + dp[j].dp_ehd = i % d1->bios_hd; + i -= dp[j].dp_ehd; + i /= d1->bios_hd; + dp[j].dp_ecyl = i; + switch (c1->type) { + case freebsd: + dp[j].dp_typ = 0xa5; + break; + case fat: + dp[j].dp_typ = 1; + break; + case extended: + dp[j].dp_typ = 5; + break; + case foo: + dp[j].dp_typ = - c1->subtype; + break; + } + } + for(i=0;i<NDOSPART;i++) + if (!s[i]) + memset(dp+i,0,sizeof *dp); + + write_block(fd,WHERE(0,d1),mbr); + + close(fd); return 0; } |