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Re: Xcode updating of source file modified time stamp

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Re: Xcode updating of source file modified time stamp

Subject: Re: Xcode updating of source file modified time stamp
From: Jens Alfke <email@hidden>
Date: Mon, 14 Sep 2009 10:10:25 -0700

On Sep 14, 2009, at 7:11 AM, Jonas Maebe wrote:

Mac programs generally don't overwrite an existing file when changing it, but save to a new file and then atomically exchange the old and new file. See e.g.https://developer.apple.com/mac/library/documentation/Carbon/Reference/File_Manager/Reference/reference.html#//apple_ref/c/func/FSExchangeObjects (FSExchangeObjects). I guess this Mozy program should listen for different kinds of events rather than only date/time changes to existing files.

TextEdit definitely uses overwriting saves, and TextMate probably does too, so this wouldn't explain the problem.

(If you really want to see what's going on at the filesystem level, run "sudo fs_usage Xcode".)

—Jens

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References:
	>Xcode updating of source file modified time stamp (From: Stuart Malin <email@hidden>)
	>Re: Xcode updating of source file modified time stamp (From: Jonas Maebe <email@hidden>)

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