February 2017 - Darwin-kernel

Re: com.apple.FinderInfo question
by Quinn "The Eskimo!" 27 Feb '17

27 Feb '17

On 25 Feb 2017, at 23:36, Gordo Cath <ds(a)y23.org> wrote: > Is it an applications responsibility to create & write data to this attribute? That depends on what you mean by “responsibility”. This extended attribute is used to hold legacy HFS Plus metadata (things like the file type, creator and Finder flags). The OS does not, in general, use any of this metadata. However, the APIs to manage that metadata are still in the system and some apps use it for various reasons. As to what you, as an app developer, should do, that depends on your specific situation. For example: * If you’re just creating files, you don’t need to set the legacy HFS Plus metadata unless, well, you need to set it. If your app is working fine without setting any legacy HFS Plus metadata, that’s a /good/ thing (-: * If you’re copying arbitrary files, you need to preserve this and other extended attributes. Most high-level copying APIs take care of this for you. Share and Enjoy -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Relations, Developer Technical Support, Core OS/Hardware _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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com.apple.FinderInfo question
by Gordo Cath 25 Feb '17

25 Feb '17

Hi, I'm using Yosemite and have a question about the com.apple.FinderInfo extended attribute. First I'm not certain if this is the right place to ask this question or not. Is it an applications responsibility to create & write data to this attribute? Or is it the OS's responsibility to create & write data to the attribute? The reason why I'm asking is I've noticed most of the apps native to Apple that create files seem to create and write data. Additionally third party apps such as MS Office etc all seem to have this extended attribute as well. However I have run into some things which create files that do not create this attribute. for example if i create a file with vi and save it. that file won't have the com.apple.FinderInfo associated with the file as an extended attribute. I have found a couple of third party apps that do do it as well. If it is the applications responsibility, whats the best way to create this extended attribute without using xattr -w? Thanks GC _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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Is there any special flag for printf to show up in syslog.log on 10.12.N ?
by Prokash Sinha 15 Feb '17

15 Feb '17

Hi All, Is there any flag to be enabled from cmd line / sysctl etc., to get the printf from kext to go to syslog ? Thanks, Prokash _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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