diff options
| -rw-r--r-- | disk/part_dos.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/disk/part_dos.c b/disk/part_dos.c index 37087a6ac3b..ab984cddf75 100644 --- a/disk/part_dos.c +++ b/disk/part_dos.c @@ -74,13 +74,26 @@ static void print_one_part(dos_partition_t *p, int ext_part_sector, static int test_block_type(unsigned char *buffer) { + int slot; + struct dos_partition *p; + if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { return (-1); } /* no DOS Signature at all */ - if (strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],"FAT",3)==0 || - strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],"FAT32",5)==0) { - return DOS_PBR; /* is PBR */ + p = (struct dos_partition *)&buffer[DOS_PART_TBL_OFFSET]; + for (slot = 0; slot < 3; slot++) { + if (p->boot_ind != 0 && p->boot_ind != 0x80) { + if (!slot && + (strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET], + "FAT", 3) == 0 || + strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET], + "FAT32", 5) == 0)) { + return DOS_PBR; /* is PBR */ + } else { + return -1; + } + } } return DOS_MBR; /* Is MBR */ } |