diff options
Diffstat (limited to 'rescuept/rescuept.c')
| -rw-r--r-- | rescuept/rescuept.c | 117 |
1 files changed, 114 insertions, 3 deletions
diff --git a/rescuept/rescuept.c b/rescuept/rescuept.c index b549568f1..8be535381 100644 --- a/rescuept/rescuept.c +++ b/rescuept/rescuept.c @@ -1,4 +1,25 @@ -/* call: rescuept /dev/hda */ +/* + * rescuept - Andries Brouwer - aeb@cwi.nl - 1999 + * + * This may be distributed under the GPL. + * + * call: rescuept /dev/xxx + * + * The output is a proposed partition table, in the + * form of input to sfdisk. Typical use: + * + * ./rescuept /dev/xxx > xxx.pt + * now look at xxx.pt to see whether it resembles what + * you expected, and possibly edit the partition types; + * if you are satisfied, then + * sfdisk /dev/xxx < xxx.pt + * will restore your partition table. If you are cautious, use + * sfdisk /dev/xxx -O xxx.old < xxx.pt + * so that the original state can be retrieved using + * sfdisk /dev/xxx -I xxx.old + * + * Here xxx stands for hda or hdb or sda or sdb or ... + */ #include <stdio.h> #include <fcntl.h> #include <string.h> @@ -113,7 +134,7 @@ void outparts() { } void outmsg(char *msg, int start, int nextstart, unsigned char type) { - printf("# %4d MB %16s (type %2x): sectors %9d-%9d\n", + printf("# %5d MB %16s (type %2x): sectors %9d-%9d\n", ((nextstart-start)+1024)/2048, msg, type, start, nextstart-1); } @@ -307,7 +328,7 @@ struct fat_boot_sector_start { fd 5.25" 9/2/40 360k fe 5.25" 8/1/40 160k ff 5.25" 8/2/40 320k - Conclusion: this bytes does not differentiate between 3.5" and 5.25", + Conclusion: this byte does not differentiate between 3.5" and 5.25", it does not give the capacity or the number of sectors per track. However, maybe C and H can be derived. */ @@ -415,6 +436,40 @@ struct swap_header_v1 { unsigned int badpages[1]; }; +struct unixware_slice { + unsigned short slice_type; + unsigned short slice_flags; + unsigned int start; + unsigned int size; +}; + +struct bsd_disklabel { + uchar d_magic[4]; + uchar d_stuff1[4]; + uchar d_typename[16]; /* type name, e.g. "eagle" */ + uchar d_packname[16]; /* pack identifier */ + uint32 d_secsize; /* # of bytes per sector */ + uint32 d_nsectors; /* # of data sectors per track */ + uint32 d_ntracks; /* # of tracks per cylinder */ + uint32 d_ncylinders; /* # of data cylinders per unit */ + uint32 d_secpercyl; /* # of data sectors per cylinder */ + uint32 d_secperunit; /* # of data sectors per unit */ + uchar d_stuff2[68]; + uchar d_magic2[4]; /* the magic number (again) */ + uint16 d_checksum; /* xor of data incl. partitions */ + + /* filesystem and partition information: */ + uint16 d_npartitions; /* number of partitions in following */ + uint32 d_bbsize; /* size of boot area at sn0, bytes */ + uint32 d_sbsize; /* max size of fs superblock, bytes */ + struct bsd_partition { /* the partition table */ + uint32 p_size; /* number of sectors in partition */ + uint32 p_offset; /* starting sector */ + uchar p_stuff[8]; + } d_partitions[16]; /* 16 is for openbsd */ +}; + + int main(int argc, char **argv){ int i,j,fd; @@ -631,6 +686,62 @@ main(int argc, char **argv){ } } + + if (bp[4] == 0x0d && bp[5] == 0x60 && + bp[6] == 0x5e && bp[7] == 0xca && /* CA5E600D */ + bp[156] == 0xee && bp[157] == 0xde && + bp[158] == 0x0d && bp[159] == 0x60) /* 600DDEEE */ { + int ss, es; + struct unixware_slice *u; + printf("# Unixware partition seen\n"); + u = (struct unixware_slice *)(bp + 216); + if (u->slice_type == 5 /* entire disk */ + && (u->slice_flags & 0x200)) /* valid */ { + ss = u->start; + es = u->start + u->size; + outmsg("Unixware ptn", ss, es, 0x63); + addpart(ss, es-ss, 0x63); + i = es-1; + continue; + } else + printf("# Unrecognized details\n"); + } + + /* bsd disk magic 0x82564557UL */ + if (bp[0] == 0x57 && bp[1] == 0x45 && bp[2] == 0x56 && bp[3] == 0x82) { + int ss, es, npts, j; + struct bsd_disklabel *l; + struct bsd_partition *p; + printf("# BSD magic seen in sector %d\n", i); + l = (struct bsd_disklabel *) bp; + if (l->d_magic2[0] != 0x57 || l->d_magic2[1] != 0x45 || + l->d_magic2[2] != 0x56 || l->d_magic2[3] != 0x82) + printf("# 2nd magic bad - ignored this sector\n"); + else if ((npts = l->d_npartitions) > 16) + printf("# strange number (%d) of subpartitions - " + "ignored this sector\n", npts); + else { + for (j=0; j<npts; j++) { + p = &(l->d_partitions[j]); + if (p->p_size) + printf("# part %c: size %9d, start %9d\n", + 'a'+j, p->p_size, p->p_offset); + } + ss = l->d_partitions[2].p_offset; + es = ss + l->d_partitions[2].p_size; + if (ss != i-1) + printf("# strange start of whole disk - " + "ignored this sector\n"); + else { + /* FreeBSD 0xa5, OpenBSD 0xa6, NetBSD 0xa9, BSDI 0xb7 */ + /* How to distinguish? */ + outmsg("BSD partition", ss, es, 0xa5); + addpart(ss, es-ss, 0xa5); + i = es-1; + continue; + } + } + } } outparts(); |