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Quarantine API failure
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Quarantine API failure


  • Subject: Quarantine API failure
  • From: Wim Lewis <email@hidden>
  • Date: Mon, 5 Nov 2007 16:51:25 -0800

For some reason I can't set quarantine info on a file from within my application. I can write a minimal command-line tool to do it, setting the same quarantine info dictionary on the same file, and it works. But calling
LSSetItemAttribute(&carbonRef, kLSRolesAll, kLSItemQuarantineProperties, quarantineProperties)
from within my app returns -1427 (errFSAttributeNotFound).


This is odd because I'm trying to *set* it, so it shouldn't matter if it's not found. Stepping through the LaunchServices code in the debugger shows that the underlying error code from syscall is ENOATTR.

A 10-line command-line tool works as documented; LSSetItemAttribute() returns noErr, and xattr indicates that the com.apple.quarantine attribute has been set. This is on the same file and with the same properties dictionary as the one that fails in the Cocoa app. I've also tried explicitly setting the kLSQuarantineAgentNameKey and kLSQuarantineAgentBundleIdentifierKey keys, since those would be different between the app and the tool, but this does not change the behavior. The two properties I'm setting are kLSQuarantineDataURLKey and kLSQuarantineTypeKey (to kLSQuarantineTypeOtherDownload).

For extra strangeness, if I stop the app in the debugger when it's about to call LSSetItemAttribute(), and then run the command-line tool, the tool succeeds (setting the attribute), and then the app "succeeds" --- it returns noErr --- but it *removes* the quarantine info from the file (according to xattr).

Any clues? Has anyone else used the quarantine API yet (successfully, that is)?


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