static USHORT CheckWriteProtect(PVOLINFO pVolInfo)
{
USHORT rc;
USHORT usSectors = 1;
if (f32Parms.fMessageActive & LOG_FUNCS)
Message("CheckWriteProtect");
rc = FSH_DOVOLIO(DVIO_OPREAD, DVIO_ALLACK, pVolInfo->hVBP, pVolInfo->pbFatSector, &usSectors, 1L);
if (!rc)
{
usSectors = 1;
rc = FSH_DOVOLIO(DVIO_OPWRITE, DVIO_ALLACK, pVolInfo->hVBP, pVolInfo->pbFatSector, &usSectors, 1L);
}
return rc;
}
int far pascal _loadds FS_MOUNT(
unsigned short flag,
struct vpfsi far *pvpfsi,
struct vpfsd far *pvpfsd,
unsigned short hVPB,
char far *pBoot
)
{
unsigned short cbSec = 1;
unsigned short old_hVPB;
unsigned short selector;
char far *p;
int rc;
int i;
kprintf("**** FS_MOUNT\n");
if (flag)
return ERROR_NOT_SUPPORTED;
memset(pvpfsd, 0, sizeof(struct vpfsd));
secsize = pvpfsi->vpi_bsize;
volsize = pvpfsi->vpi_totsec * secsize;
kprintf("volume size: %lu bytes, sector size: 0x%x\n", volsize, secsize);
pdpb = (struct dpb far *)pvpfsi->vpi_hDEV;
kprintf("DPB addr: pvpfsi->vpi_hDEV = 0x%08lx\n", pdpb);
kprintf("vpi_pDCS = 0x%08lx, vpi_pVCS = 0x%08lx\n",
pvpfsi->vpi_pDCS,
pvpfsi->vpi_pVCS);
kprintf("hVPB: 0x%04x\n", hVPB);
if (drvletter == 'A' + pvpfsi->vpi_drive)
{
my_hVPB = hVPB;
// ...
memset(boot, 0, sizeof(boot));
rc = FSH_DOVOLIO(8, // return errors directly, not through harderr daemon
1 + 2 + 4 + 8, // ABORT | RETRY | FAIL | IGNORE
hVPB,
boot,
&cbSec,
0);
kprintf("FSH_DOVOLIO: rc = 0x%x\n", rc);
if (rc) FSH_INTERR(read_panic, strlen(read_panic));
kprintf("read %u sectors\n", cbSec);
// ...
// save devcaps structure to the safe place
memmove(&devcaps, pvpfsi->vpi_pDCS, sizeof(struct devcaps));
// save volume characteristics
memmove(&volchars, pvpfsi->vpi_pVCS, sizeof(volchars));
memset(save_map, 0, sizeof(save_map));
return NO_ERROR; // volume is recognized
}
return NO_ERROR + 1; // volume is not recognized
}
int far pascal _loadds FS_READ(
struct sffsi far *psffsi,
struct sffsd far *psffsd,
char far *pData,
unsigned short far *pLen,
unsigned short IOflag
)
{
int rc;
kprintf("**** FS_READ\n");
filemax = psffsi->sfi_size;
filepos = psffsi->sfi_position;
kprintf("sfi_size = %lu, sfi_position = %lu\n", filemax, filepos);
kprintf("buf = 0x%08lx, size = %u\n", pData, *pLen);
if (*((unsigned long far *)psffsd + 1)) // direct read flag
{
if (!(rc = FSH_PROBEBUF(1, pData, *pLen)))
{
unsigned short cbSec = *pLen / secsize;
if (rc = FSH_DOVOLIO(8, // return errors directly, don't use harderr daemon
1 + 2 + 4, // ABORT | RETRY | FAIL
psffsi->sfi_hVPB,
pData,
&cbSec,
filepos / secsize))
kprintf("FSH_DOVOLIO failed, rc = %u\n", rc);
else
{
kprintf("FSH_DOVOLIO(buf = 0x%08lx, len = %u, start = %lu sectors) succeeded\n",
pData,
cbSec,
filepos / secsize);
*pLen = cbSec * secsize;
kprintf("%u butes read\n", *pLen);
filepos += *pLen;
rc = NO_ERROR;
}
}
else
{
kprintf("FS_READ: FSH_PROBEBUF failed!\n");
rc = 1;
}
}
else
{
filebase = *((unsigned long far *)psffsd);
advance_ptr();
if (rc = MFS_READ(pData, pLen))
{
kprintf("MFS_READ failed, rc = %u\n", rc);
}
}
psffsi->sfi_position = filepos;
return rc;
}
