March 2011 - Darwin-kernel - lists.apple.com

Re: How to tell if system shutdown is in process
by Antoine Missout 23 Mar '11

23 Mar '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Check this: http://stackoverflow.com/questions/1321219/receiving-power-notifications-es… - Antoine On 2011-03-22, at 18:45, Jerry Krinock wrote: > I have a command-line tool which can be started automatically by launchd. Sometimes, it can start a task which takes about 30 seconds, and if this happens while the system is being shut down, it may be killed before the task completes, causing unexpected results. > > In the man page for shutdown, I read: > > "Upon shutdown, all running processes are sent a SIGTERM followed by a SIGKILL. The SIGKILL will follow the SIGTERM by an intentionally indeterminate period of time. Programs are expected to take only enough time to flush all dirty data and exit." > > Fair enough. However, I'd like to know as early as possible when shutdown has commenced, so I can avoid starting any long-winded tasks. If all running processes receive this SIGTERM quickly upon shutdown commencement, then I think that installing a signal handler for SIGTERM would be an optimal solution. > > Do all running processes receive this SIGTERM quickly upon shutdown commencement? > > If, on the other hand, SIGTERM messages are sent to processes randomly over many seconds, is there any other way I could get a leg up by checking to see if the system is currently in the process of shutting down? > > Thanks, > > 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/antoine.missout%40meta… > > This email sent to antoine.missout(a)metakine.com _______________________________________________ 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

How to tell if system shutdown is in process
by Jerry Krinock 22 Mar '11

22 Mar '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com I have a command-line tool which can be started automatically by launchd. Sometimes, it can start a task which takes about 30 seconds, and if this happens while the system is being shut down, it may be killed before the task completes, causing unexpected results. In the man page for shutdown, I read: "Upon shutdown, all running processes are sent a SIGTERM followed by a SIGKILL. The SIGKILL will follow the SIGTERM by an intentionally indeterminate period of time. Programs are expected to take only enough time to flush all dirty data and exit." Fair enough. However, I'd like to know as early as possible when shutdown has commenced, so I can avoid starting any long-winded tasks. If all running processes receive this SIGTERM quickly upon shutdown commencement, then I think that installing a signal handler for SIGTERM would be an optimal solution. Do all running processes receive this SIGTERM quickly upon shutdown commencement? If, on the other hand, SIGTERM messages are sent to processes randomly over many seconds, is there any other way I could get a leg up by checking to see if the system is currently in the process of shutting down? Thanks, 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

Re: Memory Corruption
by brian.bechtel＠gmail.com 18 Mar '11

18 Mar '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:references:in-reply-to:mime-version :content-transfer-encoding:content-type:message-id:cc:x-mailer:from :subject:date:to; bh=OaNa/PriQhGPHBmlMK7VSryi2+BXNLi1Ow0u8IBEh4E=; b=Rnfta27kYA1TleM4rredbFmU/iWF6hwkGzfCghvXrVjniR+4MUeQOLI9HRdA7qNWIr L7fVH2KxgKRqUC9DHLSWZaubGzS/wsaNP9im6879X0rzSD2HVvHacPUekJjqOXO/YTw2 FqfUMWCpaKIYTM9R58zit3OsuaUiLIsgCN634= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=references:in-reply-to:mime-version:content-transfer-encoding :content-type:message-id:cc:x-mailer:from:subject:date:to; b=Guv12zqOjEyhxyH0VqZeiX3Tv+AUXxJn+StQfTpCxVQZMmP/C6JY4djH3eIDxxGTDg xeENUCYLsFgVM3KKwBALz+xk41EhIbKkR4Z5cO0ToknIUzkskNys8GAt+EsaYm3+ZUYq kxjOgB2Qs+RfLxJ4C8T1wFbum8KZjjQOvhUuE= _______________________________________________ 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

Memory Corruption
by Leonard Shoell 17 Mar '11

17 Mar '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Thread-index: Acvk4rq7gkx+D2B9S8W1Pstt6rZEXg== _______________________________________________ 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: Use of /private
by Todd Heberlein 14 Mar '11

14 Mar '11

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com On Mar 14, 2011, at 9:58 AM, Shantonu Sen wrote: > Are you saying this is a regression from Leopard or a previous release? Auditing was broken on Leopard (and I think the previous release). I'm just diving into more details about what the audit trail generates, and this week I was setting up a set of directory prefixes for which I want to be notified if their contents are modified, namely those directories that effect the integrity/security of the system. I hope there is a relatively small set of programs that should modify these. For example, I noticed last week when the software updater updated iTunes, a program called "shove" did the actual modification to the application. Is there already a well-known set of directory prefixes whose contents should not be modified except through a well-known set of programs? > /private has always existed on Mac OS X, and is a vestige of network rooting support from NeXTSTEP. For some reason I thought it might be associated with a trend towards sandboxing where each application would get its own virtual or real copy of the system files, so if one program went rogue and modified the system, it wouldn't affect the other programs. I guess I was thinking too hard. Todd _______________________________________________ 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: Use of /private
by Shantonu Sen 14 Mar '11

14 Mar '11

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com /private has always existed on Mac OS X, and is a vestige of network rooting support from NeXTSTEP. The paths logged by the auditing subsystem (should have) always been after pathname translation, and be the equivalent of a realpath(3)-ed path on the input paths. Are you saying this is a regression from Leopard or a previous release? Shantonu Sen ssen(a)apple.com On Mar 14, 2011, at 9:51 AM, Todd Heberlein wrote: > In Snow Leopard's audit trails I see a lot of accesses to paths that begin with "private", like "/private/etc/security" instead of just "/etc/security". I see that "/etc", "/tmp", and "/var" are all symbolic links to their equivalents inside "/private". > > Is there some new behavior to the system because of the use of the "/private" directory? > > Todd > > _______________________________________________ > 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/ssen%40apple.com > > This email sent to ssen(a)apple.com _______________________________________________ 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: Use of /private
by Kevin Van Vechten 14 Mar '11

14 Mar '11

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com Somewhat the opposite. Use of /private originated in NeXTSTEP and has been present in every version of Mac OS X. (I believe it was intended to partition modifiable system data from the root filesystem so that the root filesystem could be a read-only NFS mount.) Kevin On Mar 14, 2011, at 9:51 AM, Todd Heberlein wrote: > In Snow Leopard's audit trails I see a lot of accesses to paths that begin with "private", like "/private/etc/security" instead of just "/etc/security". I see that "/etc", "/tmp", and "/var" are all symbolic links to their equivalents inside "/private". > > Is there some new behavior to the system because of the use of the "/private" directory? _______________________________________________ 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

Use of /private
by Todd Heberlein 14 Mar '11

14 Mar '11

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com In Snow Leopard's audit trails I see a lot of accesses to paths that begin with "private", like "/private/etc/security" instead of just "/etc/security". I see that "/etc", "/tmp", and "/var" are all symbolic links to their equivalents inside "/private". Is there some new behavior to the system because of the use of the "/private" directory? Todd _______________________________________________ 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

Looking to hire a programmer
by SM Project 10 Mar '11

10 Mar '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:date:message-id:subject:from:to :content-type; bh=iC9VtFGcHA+04bO0dcKwHcy8jKMIJNo37/h0WEtZwBo=; b=ckuDfhC/sMr7euiHiqg5dk8R7KO7dpOhyb7PRG1v+83Xt1tCqZomahZE+TxaizshRn p7pieqniV4b6ch+dqBec39ouWYSBXU5c3qhJdbznrvqO+4eYdNG0MWZrgOZHG4b2PzOY 6XoNnQ3E/waKDkSblhEV6M/noJNnYzd9dRBKs= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=dguQTEgFdf1qyjrCLI/KgMstj9ipUDIHErIhWhzYhvHBKiV/NqvZ4vNRecA27na/UX dC1DrauWnr1vuQpx/7q7T+lgIFZirNx4nksXq42H/nKMTzIbxswwEq1Qq3lN2a9DYlA+ 9IpuhXnfRq2i3wRTAG2YdFh9mPip8HbHwzvY8= Hello, I'm looking to hire a programmer who could create a (relatively) simple USB device driver for Mac OS X. The driver should extend the generic driver that comes with the OS. This is a pretty interesting project. Chances are you will personally like it as well as I do! If you're not a full-time freelancer and you could work only from time to time, this is fine. If you haven't done this before but you think you have sufficient experience and you would like to try, this is fine as well. Please contact me at dae.smp(a)gmail.com. Thanks for attention! --Dae _______________________________________________ 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: cannot access memory errors with gdb
by mogambo 09 Mar '11

09 Mar '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=Qmi+PoiWqh9aRyhAkASH6l4eQ3Iy6nkf+1/0WMVLooI=; b=wT0ZZltnxD/45t74lhs7stJ28PQe8rtCg8GCMnaSsEW+XM4DL1ecdqYqXB2jEe8GHE PTsrnNfrHNsV7t3ffJVzsoVSwtd1jYnJk4O7vLVULYtWqtyePEPZX9uOPcp2VZEXXDrE t5itsmd3Vo7md3dis7E0VGwnTL91lOr/FW2Ng= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=wr3fVyWEtAy6TmL1Rom9G4byaxF9HFqPTBQk4Omho2MowQbEhh3VulLbf/F0BVueHr b9ZYmrE3qWo71feZoEeobYxYi40sg36UpOgEhCD//azwaGHhDX2Jah/sbc3G0jIAQe3A 8vKBGibhvJeCuAYLsjQ1DOmhFi1UljKeZ9xx0= _______________________________________________ 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