October 2006 - Darwin-kernel

Re: cp creates directory with different permissions -- then reverts them
by Quinn 31 Oct '06

31 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com o There is a documented creation date that does the same, also in "Finder.h". <http://developer.apple.com/samplecode/MoreAppleEvents/index.html> getattrlist stat PBGetCatInfo FSGetCatalogInfo ----------- ---- ------------ ---------------- ATTR_CMN_CRTIME st_atimespec ioFlCrDat createDate ATTR_CMN_MODTIME st_mtimespec ioFlMdDat contentModDate ATTR_CMN_CHGTIME st_ctimespec attributeModDate ATTR_CMN_ACCTIME accessDate ATTR_CMN_BKUPTIME ioFlBkDat backupDate <http://developer.apple.com/bugreporter/> S+E -- 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: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… At 13:50 -0500 30/10/06, Michael Cashwell wrote: One approach I've seen for this is to do the scribbling (writing, copying, changing of permissions, etc.) somewhere hidden on the same file system and then when that's finished move the item to the Finder-visible location. In general, this is the best approach. It avoids the whole issue of the Finder seeing partial results, which makes the rest of this discussion moot. If this isn't possible (for example, you can't find a suitable writable hidden location on the destination volume), there are a bunch of things that you can do to help the Finder along: o There are documented file types that the Finder recognises as indicating that a file is busy. See "Finder.h". o There is an Apple event that you can send to the Finder to request that it syncs its view of a folder with the on-disk representation. This is the "update" event in AppleScript. MoreAppleEvents has a routine to send this. At 15:04 -0500 30/10/06, Dan Shoop wrote: Which is caused by confusing the Mac Creation Date of a file with the unix ctime, which (contrary to much misinformation) is not the creation time of the file at all but the change time of the file, something best associated with the Mac concept of Modification Date. Unix doesn't have a concept of creation time. Indeed, it doesn't. However, Mac OS X does. Take a look at the documentation for <x-man-page://2/getattrlist>. There are 5 date/time attributes, which map to traditional UNIX and Mac OS attributes as follows: Traditional Mac OS creation dates and traditional UNIX ctime are distinct attributes, and they are treated as such at the API level. Indeed this preserving behavior for such foreign systems -- and the preservation of Creation Date -- was long ago codified as part of AppleDoubles. Again, that's just not true. It's true that some volume formats do not support creation dates. However, Mac OS X does not try to emulate the creation dates on such volumes. For example, if you mount a DOS/FAT volume on the Mac and view creation dates in the Finder, you will see a column of "----". I'd love to discuss this off-list with Apple Engineering. If you have specific reproducible complaints (for example, "ditto" not copying ACLs), the best thing to do is to file a bug. That's how stuff gets fixed. This email sent to site_archiver(a)lists.apple.com

1 0

Process name from PID inside kernel?
by Rick Mann 31 Oct '06

31 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com I've been looking through the KPI, and I'm not having a lot of luck. Any suggestions? Thanks! -- Rick _______________________________________________ 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: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… I found a hacked way to get the PID inside my kext, which is fragile, but works for now. Now I'd like to get the name of that process. I've actually got access to the executable's vnode, but I can't figure out how to get the filename from the vnode from within the kernel. This would be sufficient for now. This email sent to site_archiver(a)lists.apple.com

1 0

pci-probe-mask
by Rakesh Singhal 31 Oct '06

31 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:mime-version:content-type; b=VUaRh3rRSLvDSOFYiOBZI8ooUmCufzB/xGeis3uKIQFruNQD2z+h+i6YQRu7pt8TYJl7Nw2TzVruVk8KoXANa0UlJEtTN8YbrpJY9lPrwGSuExY1d1eaZhY9aknlSWXy3jd+5taToS1uVrTfxpPGOcbU1uA6Y3sJXslFGks14Tk= _______________________________________________ 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: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

1 0

Re: Getting the current PID inside kext?
by Justin C. Walker 31 Oct '06

31 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Oct 30, 2006, at 21:19 , Rick Mann wrote: Have you read up on the KPI? It is discussed in Apple's developer docs. Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for the Absorption of Federal Funds -------- Men are from Earth. Women are from Earth. Deal with it. -------- _______________________________________________ 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: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… On Oct 30, 2006, at 21:13 , Justin C. Walker wrote: Can I use <sys/proc.h> and extern_proc with current_proc() to get at the pid? You should review the KPI documents to see how to interact with the kernel. Check the Apple developer website: <http://developer.apple.com/documentation/Darwin/Conceptual/ KEXTConcept/KEXTConceptDependencies/kext_dependencies.html> This document seems to indicate that sys is available, It is available, and does represent what is in the kernel (as does all of /usr/include/sys), but: but when I include <sys/proc.h>, struct extern_proc does not get declared. I can't seem to figure out why not, except perhaps the compiler is including a different file than Command-D is opening up for me. This email sent to site_archiver(a)lists.apple.com

1 0

Re: Getting the current PID inside kext?
by Rick Mann 31 Oct '06

31 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Oct 30, 2006, at 21:13 , Justin C. Walker wrote: Okay, that's fine, I remember reading that. -- Rick _______________________________________________ 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: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… getpid() doesn't seem to be available to a kext (I try to include <unistd.h> but it fails). If you are trying to use this header in a kernel extension, you may not fully understand the programming model. Nothing in /usr/ include is usable in the kernel or its extensions. Nothing in /usr/ lib is usable in the kernel. Some functions and definitions that occur in /usr/include may be provided by the kernel, but they aren't really the same. Can I use <sys/proc.h> and extern_proc with current_proc() to get at the pid? You should review the KPI documents to see how to interact with the kernel. Check the Apple developer website: <http://developer.apple.com/documentation/Darwin/Conceptual/ KEXTConcept/KEXTConceptDependencies/kext_dependencies.html> This document seems to indicate that sys is available, but when I include <sys/proc.h>, struct extern_proc does not get declared. I can't seem to figure out why not, except perhaps the compiler is including a different file than Command-D is opening up for me. This email sent to site_archiver(a)lists.apple.com

1 0

Re: Getting the current PID inside kext?
by Justin C. Walker 31 Oct '06

31 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On Oct 30, 2006, at 21:00 , Rick Mann wrote: Justin -- Justin C. Walker, Curmudgeon-at-Large () The ASCII Ribbon Campaign /\ Help Cure HTML Email _______________________________________________ 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: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… getpid() doesn't seem to be available to a kext (I try to include <unistd.h> but it fails). If you are trying to use this header in a kernel extension, you may not fully understand the programming model. Nothing in /usr/include is usable in the kernel or its extensions. Nothing in /usr/lib is usable in the kernel. Some functions and definitions that occur in / usr/include may be provided by the kernel, but they aren't really the same. Can I use <sys/proc.h> and extern_proc with current_proc() to get at the pid? You should review the KPI documents to see how to interact with the kernel. Check the Apple developer website: <http://developer.apple.com/documentation/Darwin/Conceptual/ KEXTConcept/KEXTConceptDependencies/kext_dependencies.html> This email sent to site_archiver(a)lists.apple.com

1 0

Getting the current PID inside kext?
by Rick Mann 31 Oct '06

31 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com TIA, -- Rick _______________________________________________ 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: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… getpid() doesn't seem to be available to a kext (I try to include <unistd.h> but it fails). Can I use <sys/proc.h> and extern_proc with current_proc() to get at the pid? This email sent to site_archiver(a)lists.apple.com

1 0

Any way to get PID of kauth FILEOP auth requestor?
by Rick Mann 31 Oct '06

31 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com TIA, -- Rick _______________________________________________ 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: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… Is there any way to get the process ID of of the process attempting to conduct a FILEOP from within the kauth listener? I have credentials and a vnode, but it doesn't look like the credentials carry the PID information, and I've already looked into getting the PID from a vnode. While I believe the vnode's v_owner field will hold the current_thread, there's no way, that I can find, to get the PID from this. This email sent to site_archiver(a)lists.apple.com

1 0

Re: creation date vs ctime
by Peter Bierman 30 Oct '06

30 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com on 06/10/30 16:04, Dan Shoop at shoop(a)iwiring.net wrote: It's informative, yes, but also orthogonal to the original question. The thread is in the archive: http://lists.apple.com/archives/darwin-kernel/2006/Aug/msg00048.html -pmb _______________________________________________ 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: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… At 5:56 PM -0400 10/30/06, Jerry Krinock wrote: I'd love to discuss this off-list with Apple Engineering. I think this discussion is most informative. Please keep it "on-list". The bug covering the problem is: <radar:4340518> Metadata loss: creation dates not maintained when using CpMac, cp, rysnc The problem with rehashing this issue here is that mailing list discussions don't fix bugs. Engineers at Apple fix bugs. If this discussion (or the archived one above) generates good bugs identifying which components don't properly support creation dates, then we can focus on fixing those bugs. This email sent to site_archiver(a)lists.apple.com

1 0

Re: cp creates directory with different permissions -- then reverts them
by Jerry Krinock 30 Oct '06

30 Oct '06

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Thread-index: Acb8drPU8pbDF2hpEduNFgAWy6NyrA== Thread-topic: cp creates directory with different permissions -- then reverts them User-agent: Microsoft-Entourage/11.2.5.060620 on 06/10/30 16:04, Dan Shoop at shoop(a)iwiring.net wrote: > I'd love to discuss this off-list with Apple Engineering. I think this discussion is most informative. Please keep it "on-list". Jerry Krinock _______________________________________________ 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: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

1 0