/*
* NAME: low->readblock0()
* DESCRIPTION: read the first sector and get bearings
*/
int l_readblock0(hfsvol *vol)
{
block b;
unsigned char *ptr = b;
Block0 rec;
if (b_readlb(vol, 0, &b) < 0)
return -1;
d_fetchw(&ptr, &rec.sbSig);
d_fetchw(&ptr, &rec.sbBlkSize);
d_fetchl(&ptr, &rec.sbBlkCount);
d_fetchw(&ptr, &rec.sbDevType);
d_fetchw(&ptr, &rec.sbDevId);
d_fetchl(&ptr, &rec.sbData);
d_fetchw(&ptr, &rec.sbDrvrCount);
d_fetchl(&ptr, &rec.ddBlock);
d_fetchw(&ptr, &rec.ddSize);
d_fetchw(&ptr, &rec.ddType);
switch (rec.sbSig)
{
case 0x4552: /* block device with a partition table */
{
if (rec.sbBlkSize != HFS_BLOCKSZ)
{
ERROR(EINVAL, "unsupported block size");
return -1;
}
vol->vlen = rec.sbBlkCount;
if (l_readpm(vol) < 0)
return -1;
}
break;
case 0x4c4b: /* bootable floppy */
vol->pnum = 0;
break;
default: /* non-bootable floppy or something else */
/* some miscreant media may also be partitioned;
we attempt to read a partition map, but ignore any failure */
if (l_readpm(vol) < 0)
vol->pnum = 0;
}
return 0;
}
/*
* NAME: hfs->format()
* DESCRIPTION: write a new filesystem
*/
int hfs_format(char *path, int pnum, char *vname)
{
hfsvol vol;
btree *ext = &vol.ext;
btree *cat = &vol.cat;
unsigned int vbmsz;
int i, result = 0;
block vbm[16];
char *map;
if (mystrchr(vname, ':'))
{
ERROR(EINVAL, "volume name may not contain colons");
return -1;
}
i = strlen(vname);
if (i < 1 || i > HFS_MAX_VLEN)
{
ERROR(EINVAL, "volume name must be 1-27 chars");
return -1;
}
vol.flags = 0;
vol.pnum = pnum;
vol.vstart = 0;
vol.vlen = 0;
vol.lpa = 0;
vol.vbm = vbm;
vol.cwd = HFS_CNID_ROOTDIR;
vol.refs = 0;
vol.files = 0;
vol.dirs = 0;
vol.prev = 0;
vol.next = 0;
#if 0
vol.fd = open(path, O_RDWR);
if (vol.fd < 0)
{
ERROR(errno, "error opening device for writing");
return -1;
}
#endif
if (l_lockvol(&vol) < 0)
{
#if 0
close(vol.fd);
#endif
return -1;
}
if (pnum > 0)
{
if (l_readpm(&vol) < 0)
{
#if 0
close(vol.fd);
#endif
return -1;
}
}
else /* determine size of entire device */
{
unsigned long low, high, mid;
block b;
for (low = 0, high = 2879; b_readlb(&vol, high, &b) >= 0; high *= 2)
low = high;
while (low < high - 1)
{
mid = (low + high) / 2;
if (b_readlb(&vol, mid, &b) < 0)
high = mid;
else
low = mid;
}
vol.vlen = low + 1;
}
if (vol.vlen < 800 * 1024 / HFS_BLOCKSZ)
{
#if 0
close(vol.fd);
#endif
ERROR(EINVAL, "volume size must be >= 800K");
return -1;
}
/* initialize volume geometry */
vol.lpa = 1 + vol.vlen / 65536;
vbmsz = (vol.vlen / vol.lpa + 4095) / 4096;
vol.mdb.drSigWord = 0x4244;
vol.mdb.drCrDate = d_tomtime(/*time*/(0));
vol.mdb.drLsMod = vol.mdb.drCrDate;
vol.mdb.drAtrb = 0;
vol.mdb.drNmFls = 0;
vol.mdb.drVBMSt = 3;
vol.mdb.drAllocPtr = 0;
vol.mdb.drNmAlBlks = (vol.vlen - 5 - vbmsz) / vol.lpa;
vol.mdb.drAlBlkSiz = vol.lpa * HFS_BLOCKSZ;
vol.mdb.drClpSiz = vol.mdb.drAlBlkSiz * 4;
vol.mdb.drAlBlSt = 3 + vbmsz;
vol.mdb.drNxtCNID = HFS_CNID_ROOTDIR; /* modified later */
vol.mdb.drFreeBks = vol.mdb.drNmAlBlks;
strcpy(vol.mdb.drVN, vname);
vol.mdb.drVolBkUp = 0;
vol.mdb.drVSeqNum = 0;
vol.mdb.drWrCnt = 0;
vol.mdb.drXTClpSiz = vol.mdb.drNmAlBlks / 128 * vol.mdb.drAlBlkSiz;
vol.mdb.drCTClpSiz = vol.mdb.drXTClpSiz;
vol.mdb.drNmRtDirs = 0;
vol.mdb.drFilCnt = 0;
vol.mdb.drDirCnt = -1; /* incremented when root folder is created */
for (i = 0; i < 8; ++i)
vol.mdb.drFndrInfo[i] = 0;
vol.mdb.drVCSize = 0;
vol.mdb.drVBMCSize = 0;
vol.mdb.drCtlCSize = 0;
vol.mdb.drXTFlSize = 0;
vol.mdb.drCTFlSize = 0;
for (i = 0; i < 3; ++i)
{
vol.mdb.drXTExtRec[i].xdrStABN = 0;
vol.mdb.drXTExtRec[i].xdrNumABlks = 0;
vol.mdb.drCTExtRec[i].xdrStABN = 0;
vol.mdb.drCTExtRec[i].xdrNumABlks = 0;
}
/* initialize volume bitmap */
memset(vol.vbm, 0, sizeof(vbm));
/* create extents overflow file */
ext->f.vol = &vol;
ext->f.parid = 0;
strcpy(ext->f.name, "extents overflow");
ext->f.cat.cdrType = cdrFilRec;
/* ext->f.cat.cdrResrv2 */
ext->f.cat.u.fil.filFlags = 0;
ext->f.cat.u.fil.filTyp = 0;
/* ext->f.cat.u.fil.filUsrWds */
ext->f.cat.u.fil.filFlNum = HFS_CNID_EXT;
ext->f.cat.u.fil.filStBlk = 0;
ext->f.cat.u.fil.filLgLen = 0;
ext->f.cat.u.fil.filPyLen = 0;
ext->f.cat.u.fil.filRStBlk = 0;
ext->f.cat.u.fil.filRLgLen = 0;
ext->f.cat.u.fil.filRPyLen = 0;
ext->f.cat.u.fil.filCrDat = vol.mdb.drCrDate;
ext->f.cat.u.fil.filMdDat = vol.mdb.drLsMod;
ext->f.cat.u.fil.filBkDat = 0;
/* ext->f.cat.u.fil.filFndrInfo */
ext->f.cat.u.fil.filClpSize = 0;
for (i = 0; i < 3; ++i)
{
ext->f.cat.u.fil.filExtRec[i].xdrStABN = 0;
ext->f.cat.u.fil.filExtRec[i].xdrNumABlks = 0;
ext->f.cat.u.fil.filRExtRec[i].xdrStABN = 0;
ext->f.cat.u.fil.filRExtRec[i].xdrNumABlks = 0;
}
/* ext->f.cat.u.fil.filResrv */
f_selectfork(&ext->f, 0);
ext->f.clump = vol.mdb.drXTClpSiz;
ext->f.flags = 0;
ext->f.prev = ext->f.next = 0;
n_init(&ext->hdrnd, ext, ndHdrNode, 0);
ext->hdrnd.nnum = 0;
ext->hdrnd.nd.ndNRecs = 3;
ext->hdrnd.roff[1] = 0x078;
ext->hdrnd.roff[2] = 0x0f8;
ext->hdrnd.roff[3] = 0x1f8;
memset(HFS_NODEREC(ext->hdrnd, 1), 0, 128);
ext->hdr.bthDepth = 0;
ext->hdr.bthRoot = 0;
ext->hdr.bthNRecs = 0;
ext->hdr.bthFNode = 0;
ext->hdr.bthLNode = 0;
ext->hdr.bthNodeSize = HFS_BLOCKSZ;
ext->hdr.bthKeyLen = 0x07;
ext->hdr.bthNNodes = 0;
ext->hdr.bthFree = 0;
for (i = 0; i < 76; ++i)
ext->hdr.bthResv[i] = 0;
map = ALLOC(char, HFS_MAP1SZ);
if (map == 0)
{
if (result == 0)
{
ERROR(ENOMEM, 0);
result = -1;
}
}
else
{
memset(map, 0, HFS_MAP1SZ);
BMSET(map, 0);
}
ext->map = map;
ext->mapsz = HFS_MAP1SZ;
ext->flags = HFS_UPDATE_BTHDR;
ext->compare = r_compareextkeys;
if (result == 0 && bt_space(ext, 1) < 0)
result = -1;
--ext->hdr.bthFree;
/* create catalog file */
cat->f.vol = &vol;
cat->f.parid = 0;
strcpy(cat->f.name, "catalog");
cat->f.cat.cdrType = cdrFilRec;
/* cat->f.cat.cdrResrv2 */
cat->f.cat.u.fil.filFlags = 0;
cat->f.cat.u.fil.filTyp = 0;
/* cat->f.cat.u.fil.filUsrWds */
cat->f.cat.u.fil.filFlNum = HFS_CNID_CAT;
cat->f.cat.u.fil.filStBlk = 0;
cat->f.cat.u.fil.filLgLen = 0;
cat->f.cat.u.fil.filPyLen = 0;
cat->f.cat.u.fil.filRStBlk = 0;
cat->f.cat.u.fil.filRLgLen = 0;
cat->f.cat.u.fil.filRPyLen = 0;
cat->f.cat.u.fil.filCrDat = vol.mdb.drCrDate;
cat->f.cat.u.fil.filMdDat = vol.mdb.drLsMod;
cat->f.cat.u.fil.filBkDat = 0;
/* cat->f.cat.u.fil.filFndrInfo */
cat->f.cat.u.fil.filClpSize = 0;
for (i = 0; i < 3; ++i)
{
cat->f.cat.u.fil.filExtRec[i].xdrStABN = 0;
cat->f.cat.u.fil.filExtRec[i].xdrNumABlks = 0;
cat->f.cat.u.fil.filRExtRec[i].xdrStABN = 0;
cat->f.cat.u.fil.filRExtRec[i].xdrNumABlks = 0;
}
/* cat->f.cat.u.fil.filResrv */
f_selectfork(&cat->f, 0);
cat->f.clump = vol.mdb.drCTClpSiz;
cat->f.flags = 0;
cat->f.prev = cat->f.next = 0;
n_init(&cat->hdrnd, cat, ndHdrNode, 0);
cat->hdrnd.nnum = 0;
cat->hdrnd.nd.ndNRecs = 3;
cat->hdrnd.roff[1] = 0x078;
cat->hdrnd.roff[2] = 0x0f8;
cat->hdrnd.roff[3] = 0x1f8;
memset(HFS_NODEREC(cat->hdrnd, 1), 0, 128);
cat->hdr.bthDepth = 0;
cat->hdr.bthRoot = 0;
cat->hdr.bthNRecs = 0;
cat->hdr.bthFNode = 0;
cat->hdr.bthLNode = 0;
cat->hdr.bthNodeSize = HFS_BLOCKSZ;
cat->hdr.bthKeyLen = 0x25;
cat->hdr.bthNNodes = 0;
cat->hdr.bthFree = 0;
for (i = 0; i < 76; ++i)
cat->hdr.bthResv[i] = 0;
map = ALLOC(char, HFS_MAP1SZ);
if (map == 0)
{
if (result == 0)
{
ERROR(ENOMEM, 0);
result = -1;
}
}
else
{
memset(map, 0, HFS_MAP1SZ);
BMSET(map, 0);
}
cat->map = map;
cat->mapsz = HFS_MAP1SZ;
cat->flags = HFS_UPDATE_BTHDR;
cat->compare = r_comparecatkeys;
if (result == 0 && bt_space(cat, 1) < 0)
result = -1;
--cat->hdr.bthFree;
/* create root folder */
if (result == 0 && v_newfolder(&vol, HFS_CNID_ROOTPAR, vname) < 0)
result = -1;
vol.mdb.drNxtCNID = 16;
/* finish up */
if (result == 0)
{
block b;
/* write boot blocks */
memset(&b, 0, sizeof(b));
b_writelb(&vol, 0, &b);
b_writelb(&vol, 1, &b);
/* flush other disk state */
vol.flags |= HFS_UPDATE_MDB | HFS_UPDATE_ALTMDB | HFS_UPDATE_VBM;
if (v_flush(&vol, 1) < 0)
result = -1;
}
if (
#if 0
close(vol.fd) < 0 &&
#endif
result == 0)
{
ERROR(errno, "error closing device");
result = -1;
}
FREE(vol.ext.map);
FREE(vol.cat.map);
return result;
}