InstallDriverFromFile9

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InstallDriverFromFile

InstallDriverFromFile loads a driver from a file and installs it.



 
OSErr InstallDriverFromFile(

                     FSSpecPtr fragmentSpec,

                     RegEntryIDPtr device,

                     UnitNumber beginningUnit,

                     UnitNumber endingUnit,

                     DriverRefNum *refNum);

fragmentSpec: Pointer to a file system specification.
device: Pointer to Name Registry specification (may be nil).
beginningUnit: Low unit number in unit table range.
endingUnit: High unit number in unit table range.
refNum: Resulting unit table refNum value.

DESCRIPTION

InstallDriverFromFile installs a driver that is located on disk anywhere within the specified unit number range of the unit table and invokes the driver's Initialize command, passing the RegEntryIDPtr value to it. The driver's initialization code must return noErr for InstallDriverFromFile to complete successfully. This function returns the driver's refNum value but it does not open the driver.

If the unit table is filled throughout the range from beginningUnit to the value returned by HighestUnitNumber, and the table has not already grown to its maximum size, it can expand to accept the new driver. To use this feature, set endingUnit larger than the value retuned by the HighestUnitNumber function.

Note

InstallDriverFromFile uses GetDriverDiskFragment to load the driver, which then calls SetDriverClosureMemory to hold the driver's closure memory.

RESULT CODES

`noErr`	0	No error
`badUnitErr`	-21	Bad unit number
`unitTblFullErr`	-29	Unit table or requested range full
`fnfErr`	-43	File not found
All CFM errors (see Inside Macintosh: PowerPC System Software)