Question

I was looking at the LSSharedFileListCreate function in LSSharedFileListQuestion and it’s defined as:

LSSharedFileListCreate(CFAllocatorRef inAllocator, CFStringRef inListType,CFTypeRef listOptions)

inAllocator and listOptions are always set as null. I was wondering if there were any other valid values for them besides null.

Answer 1

LSSharedFileListCreate follows the same conventions as other Core Foundation functions.

The CFAllocatorRef you provide can be kCFAllocatorDefault, kCFAllocatorSystemDefault, kCFAllocatorMalloc, kCFAllocatorMallocZone, kCFAllocatorNull, or kCFAllocatorUseContext.

The one you want to use in most cases is kCFAllocatorDefault, which is synonymous with NULL, as explained in the interface file.

The value you provide to listOptions depends entirely on which value you provide; some have associated values, and some do not.

For example, if you provided kLSSharedFileListVolumesComputerVisible in inListType, you’d provide a CFBoolean value indicating TRUE or FALSE in listOptions. If you provided the example kLSSharedFileListSessionLoginItems, you’d provide NULL, since there’s no associated value.