Problem retrieving version from driver bundle on Mac OS X Intel

Hi,

 

I am in the process of porting our OS X driver and support code to Mac OS X Intel.

I have hit a minor snag in that the code I used for the retrieving the driver version for the PPC version no longer works on the Intel version.

This is the code fragment I used for the PPC version:

 

#define       kHWPlotLocation      "/System/Library/Extensions/HWPlot.kext"

 

void GetDriverVersion ( char *RefNum, char *VersionString )

{

       CFURLRef      bundleURL = NULL;

       CFBundleRef   myBundle = NULL;

CFString      cs = CFSTR ( kHWPlotLocation );

 

       // Make a CFURLRef from the CFString representation of the bundle's path.

       strcpy ( VersionString, "Unknown" );

       bundleURL = CFURLCreateWithFileSystemPath ( kCFAllocatorDefault, cs, kCFURLPOSIXPathStyle, true );

       CFRelease ( cs );

       if ( (CFURLRef)NULL != bundleURL )

       {

              myBundle = CFBundleCreate( kCFAllocatorDefault, bundleURL );

              if ( (CFBundleRef)NULL != myBundle )

              {

              // Try to get the version number from the bundle

              UInt32 ver = CFBundleGetVersionNumber ( bundle );

              UInt32 mode = ( ( ver >> 13 ) & 0x07 ) - 1;

              ShortString modes = kVersionStates;

 

              HWDBprintf ( 5, DBG_T, "ver = 0x%08lx, mode = 0x%08lx%s", ver, mode, NEWLINE );

              _stprintf ( VersionString, _T("v%d.%d.%d"), ( ( ver >> 24 ) & 0xff ),

                           ( ( ver >> 20 ) & 0x0f ), ( ( ver >> 16 ) & 0x0f ) );

              if ( kReleaseVersion != mode )

              {

                     _stprintf ( buff, _T("%c%d"), modes [ mode ], ver & 0xff );

                     _tcscat ( VersionString, buff );

              }

CFRelease( myBundle );

              }

              CFRelease( bundleURL );

       }

}

 

This works perfectly well on PPC but on Intel the CFBundleGetVersionNumber() call always returns 0.

 

I have tried KextManagerCreateURLForBundleIdentifier(), and also CFBundleGetValueForInfoDictionaryKey() with various key entries but with no success.

I either get back a version number of ZERO, or the call returns NULL.

 

Here is the info.plist file for my Intel driver which, except for the IOPCIPrimaryMatch field, is identical to the PPC driver info.plist:

 

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<plist version="1.0">

<dict>

       <key>CFBundleDevelopmentRegion</key>

       <string>English</string>

       <key>CFBundleExecutable</key>

       <string>HWPlot</string>

       <key>CFBundleGetInfoString</key>

       <string>HWPlot v5.0.2, Copyright 1996 - 2007 HighWater Designs Ltd.</string>

       <key>CFBundleIconFile</key>

       <string>hwplot.icns</string>

       <key>CFBundleIdentifier</key>

       <string>uk.co.highwater.iokit.HWPlot</string>

       <key>CFBundleInfoDictionaryVersion</key>

       <string>6.0</string>

       <key>CFBundleName</key>

       <string>HWPlot</string>

       <key>CFBundlePackageType</key>

       <string>KEXT</string>

       <key>CFBundleShortVersionString</key>

       <string>HWPlot v5.0.2</string>

       <key>CFBundleSignature</key>

       <string>HGWT</string>

       <key>CFBundleVersion</key>

       <string>5.0.2</string>

       <key>CFBundleVersionString</key>

       <string>5.0.2</string>

       <key>IOKitPersonalities</key>

       <dict>

              <key>HWPlot</key>

              <dict>

                     <key>CFBundleIdentifier</key>

                     <string>uk.co.highwater.iokit.HWPlot</string>

                     <key>IOClass</key>

                     <string>uk_co_highwater_iokit_HWPlot</string>

                     <key>IOKitDebug</key>

                     <integer>65535</integer>

                     <key>IOMatchCategory</key>

                     <string>HWPlot</string>

                     <key>IOPCIPrimaryMatch</key>

                     <string>0x099011e9&amp;0x09f0ffff</string>

                     <key>IOProviderClass</key>

                     <string>IOPCIDevice</string>

              </dict>

       </dict>

       <key>OSBundleLibraries</key>

       <dict>

              <key>com.apple.iokit.IOFireWireFamily</key>

              <string>1.0</string>

              <key>com.apple.iokit.IOPCIFamily</key>

              <string>1.1</string>

              <key>com.apple.kernel.iokit</key>

              <string>1.1</string>

              <key>com.apple.kernel.libkern</key>

              <string>1.1</string>

              <key>com.apple.kernel.mach</key>

              <string>1.1</string>

       </dict>

</dict>

</plist>

 

The driver's version information appears correctly in its Finder Get Info window, and is also correctly listed in the kextstat output.

 

While not vitally important, I would like to understand why I can no longer retrieve this information from within my code.

Any ideas?

 

 

Peter Young

" Build a man a fire - he's warm for a day. Set a man on fire - he's warm for the rest of his life!"   Peter Young Senior Software Engineer Remove .nospam from address email@hidden HighWater Designs Ltd 1-6 St. George's Business Park, Alstone Lane, Cheltenham, Gloucestershire, GL51 8HF UK Registered in England and Wales No 2111605. VAT No GB 448 485117