FSH_DOVOLIO2 - Send volume-based IOCTL request to device driver
Purpose
This function is an FSD call that controls device driver operation
independently from I/O operations.
Calling Sequence
int far pascal FSH_DOVOLIO2(hDev, sfn, cat, func, pParm, cbParm, pData,
cbData)
unsigned long hDev;
unsigned short sfn;
unsigned short cat;
unsigned short func;
char far * pParm;
unsigned short cbParm;
char far * pData;
unsigned short cbData;
Where
hDev is the device handle obtained from VPB
sfn is the system file number from the open instance that caused the FSH_
DOVOLIO2 call.
This field should be passed unchanged from the sfi-selfsfn field. It no
open instance corresponds to this call, this field should be set to
0xFFFF.
cat is the category of IOCTL to perform.
func is the function within the category of IOCTL.
pParm is the long address to the parameter area.
cbParm is the length of the parameter area.
pData is the long address to the data area.
cbData is the length of the data area.
Returns
If no error is detected, a zero error code is returned. If an error is
detected, one of the following error codes is returned:
oERROR_INVALID_FUNCTION
indicates the function supplied is incompatible with the category and the
device handle supplied.
oERROR_INVALID_CATEGORY
indicates the category supplied is incompatible with the function and the
device handle supplied.
oDevice-driver/device-manager errors listed /DDERR/
Remarks
This routine supports volume management for IOCTL operations. Any errors
are reported to the hard error daemon before returning to the FSD. Any
retries indicated by the hard error daemon or actions indicated by
DosError are done within the call to FSH_DOVOLIO2.
The purpose of this routine is to enable volume tracking with IOCTLs. It
is not available at the API level.
FSH_DOVOLIO2 may block.
System does normal volume checking for this request.
Note: OS/2 does not validate input parameters. An FSD, therefore, should
call FSH_PROBEBUF where appropriate.
Created using Inf-PHP v.2 (c) 2003 Yuri Prokushev
Created using Inf-HTML v.0.9b (c) 1995 Peter Childs