diff options
Diffstat (limited to 'disk')
| -rw-r--r-- | disk/part_dos.c | 21 | ||||
| -rw-r--r-- | disk/part_dos.h | 4 |
2 files changed, 22 insertions, 3 deletions
diff --git a/disk/part_dos.c b/disk/part_dos.c index 32333c7..d05f650 100644 --- a/disk/part_dos.c +++ b/disk/part_dos.c @@ -67,6 +67,17 @@ static void print_one_part (dos_partition_t *p, int ext_part_sector, int part_nu (is_extended (p->sys_ind) ? " Extd" : "")); } +static int test_block_type(unsigned char *buffer) +{ + if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || + (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { + return (-1); + } /* no DOS Signature at all */ + if(strncmp(&buffer[DOS_PBR_FSTYPE_OFFSET],"FAT",3)==0) + return DOS_PBR; /* is PBR */ + return DOS_MBR; /* Is MBR */ +} + int test_part_dos (block_dev_desc_t *dev_desc) { @@ -94,14 +105,18 @@ static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_s dev_desc->dev, ext_part_sector); return; } - if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || - buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { + i=test_block_type(buffer); + if(i==-1) { printf ("bad MBR sector signature 0x%02x%02x\n", buffer[DOS_PART_MAGIC_OFFSET], buffer[DOS_PART_MAGIC_OFFSET + 1]); return; } - + if(i==DOS_PBR) { + printf (" 1\t\t 0\t%10ld\t%2x\n", + dev_desc->lba, buffer[DOS_PBR_MEDIA_TYPE_OFFSET]); + return; + } /* Print all primary/logical partitions */ pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); for (i = 0; i < 4; i++, pt++) { diff --git a/disk/part_dos.h b/disk/part_dos.h index cc3fa81..ac93f20 100644 --- a/disk/part_dos.h +++ b/disk/part_dos.h @@ -34,6 +34,10 @@ #endif #define DOS_PART_TBL_OFFSET 0x1be #define DOS_PART_MAGIC_OFFSET 0x1fe +#define DOS_PBR_FSTYPE_OFFSET 0x36 +#define DOS_PBR_MEDIA_TYPE_OFFSET 0x15 +#define DOS_MBR 0 +#define DOS_PBR 1 typedef struct dos_partition { unsigned char boot_ind; /* 0x80 - active */ |