December 2005 - Darwin-dev - lists.apple.com

Re: flushing HFS cache to disk
by Mike Smith 01 Dec '05

01 Dec '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: Determining the canonical case for a file name on HFS+
by Mike Smith 01 Dec '05

01 Dec '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Dec 1, 2005, at 12:02 PM, darwin-dev-request(a)lists.apple.com wrote: Send Darwin-dev mailing list submissions to I am looking for a way to determine the canonical form for a file name. Suppose that there is a file named "FILE" in the directory / folder/, which is on an HFS+ volume: then the canonical form of the path "/folder/file" would be "/folder/FILE". Both paths refer to the same file, but the representation on disk is FILE. I need to know this for the purpose of comparison, and I cannot simply do a case-insensitive comparison because I do not know if / folder/ is on a case-insensitive or case-sensitive volume. I have thought of opening the file and then using fstat on the descriptor, but is there a better way to do it? Stat the two paths and compare the inode number for each. This is of course subject to a race with rename, but it avoids the overhead associated with actually opening the file. From a broader point of view, what I need is a reliable solution for determining if two paths refer to the same file, without assuming anything about the filesystem on which it is located. I have searched the archives of this list, but I could not find an answer to this question. That would be because there isn't one that can be reliably applied to the namespace. File/path names are indices, they don't tell you anything about the actual structure of the data being indexed. As such, the information you're looking for simply isn't there. = Mike _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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Re: flushing HFS cache to disk
by Steve Sisak 01 Dec '05

01 Dec '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Create and write to a temporary file Delete the temp file (which is now the old file) Gotta love religion. Cheers, -Steve _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… At 6:27 PM -0800 11/30/05, Dave Yost wrote: I suppose you could write the file as a temp file, do a synchronous flush of the file, then move it into place. This is of course, a hack on top of an API that was never designed to be transactional. And of course, this is exactly how an HFS "safe save" works on "traditional" MacOS: FindFolder() to get the dirID of the invisible "Temporary Items" folder on the same volume as the destination file FSpExchangeFiles() to atomically swap the contents of the files (by swapping their directory entries) -- this preserves the fileID so aliases still work. And you could still end up with a temp file lying around after a crash. On reboot, any files left in "Temporary Items" are moved to "Rescued Items", located in the Trash. Years ago there was a Cromemco unix clone that let you create a file descriptor, write to it, then link it into a directory. That was a good idea that was rejected as unorthodox. This email sent to site_archiver(a)lists.apple.com

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Re: missing project archive needed.
by Dale Walsh 01 Dec '05

01 Dec '05

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com Mta-interface: amavisd-new-2.3.3 (20050822) at daleenterprise.com 10.4 has these files but no packlist is available. On Nov 30, 2005, at 15:44 , Kevin Van Vechten wrote: Thanks, - Kevin On Nov 29, 2005, at 6:32 PM, Dale Walsh wrote: Any ideas??? -- Dale _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… I couldn't find the project listed however, after building all of the software and installing it, it appears that this is required when using SSL. I found the 3 available builds from the packlist files from 10.3 to 10.3.9. I don't think the PerlObjCBridge is open source. But if you're referring to a dead-link then please reply with the URLs so I can investigate further. Going through the modules I need to build, some appear to be appear to be missing although I believe I can get away with the last one. PerlObjCBridge 22.1 PerlObjCBridge 22.3 PerlObjCBridge 22.5 Also this module (version unknown) for darwin 8 would also be appreciated. This email sent to site_archiver(a)lists.apple.com

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Re: flushing HFS cache to disk
by Dave Yost 01 Dec '05

01 Dec '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com At 02:35 PM -0800 2005-11-30, Timothy J. Wood wrote: >On Nov 30, 2005, at 1:53 PM, Peter Bierman wrote: >>But all the filesystem operations _do_ have transactional semantics. >> >>The issue here is that someone is trying to read from the disk _behind the back_ of the filesystem. There is NO provision for that while the filesystem is in use. > > They have transactional semantics in that each individual operation is atomic That's not even true. If you do this: create-write1-write2-write3-close and the system crashes, the result must be one of: no such file empty file file with write1 file with write1-write2 file with write1-write2-write3 but not file with write2 file with write1-hole-write3 file with hole-write3 Do all journaling volume drivers make this guarantee? I think not. I suppose you could write the file as a temp file, do a synchronous flush of the file, then move it into place. This is of course, a hack on top of an API that was never designed to be transactional. And you could still end up with a temp file lying around after a crash. Years ago there was a Cromemco unix clone that let you create a file descriptor, write to it, then link it into a directory. That was a good idea that was rejected as unorthodox. Dave _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

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