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

Re: How to tell if system shutdown is in process
by Quinn "The Eskimo!" 24 Mar '11

24 Mar '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On 24 Mar 2011, at 16:44, Brian Bergstrand wrote: > I don't see that header doc in the 10.6 SDK (checked both the defines and IORegisterForSystemPower() itself). Where are you seeing it? Whoops, I was accidentally looking at a pre-release SDK. However, I don't believe that is a change a behaviour, just an update to the header docs. 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.… This email sent to site_archiver(a)lists.apple.com

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Re: How to tell if system shutdown is in process
by Brian Bergstrand 24 Mar '11

24 Mar '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha1; c=relaxed; d=classicalguitar.net; h= subject:mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s= classicalguitar.net; bh=zKXiCBc8zsiAIEr4cBWBFmbZUsI=; b=aTMnxrS0 4DtjSTfSPB7IyIZjcVuBfSHgjADaURzBNQtUeH0cbXsv5/0LHsWCXrf2kX6SJIcD tRFzrcSwbz3lXJCUZj+w3K9UvSlKekq7md4EP7TdJp6knW4tbXPXKO+txSKc5u+R 91m2VYVDlYQFjMeXUHCpalkIPhMR+2oOY1Y= Domainkey-signature: a=rsa-sha1; c=nofws; d=classicalguitar.net; h=subject :mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; q=dns; s= classicalguitar.net; b=HxGo+NMjCBeBgf7TAKWjX4LfhsUQRFqBGzZawdFf7 mBS4T1MPymUohRizVwp6Uom67N4XhzM619LNWoMpsbQP1bG4OjcDEYrXlg1ckoAE KNonzfxiwW7+hYCABD1TIo3ZSl+UHLzPVTym2sT/HXfjbXrgP6O6OffChaZPR2y2 dU= On Mar 24, 2011, at 4:14 AM, Quinn The Eskimo! wrote: > > On 24 Mar 2011, at 04:55, Brian Bergstrand wrote: > >> Use IOKit, specifically, IORegisterForSystemPower(). In the callback you provide check for kIOMessageSystemWillPowerOff and kIOMessageSystemWillRestart. > > In general IORegisterForSystemPower is fine. However, the header docs for these two events contain the text "Never delivered to user space notification clients.", leading me to believe that they won't work for a daemon. Probably worth a try though. QA1340 has code that you can easily adapt to create a simple test program. > I don't see that header doc in the 10.6 SDK (checked both the defines and IORegisterForSystemPower() itself). Where are you seeing 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.… This email sent to site_archiver(a)lists.apple.com

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Re: How to tell if system shutdown is in process
by Quinn "The Eskimo!" 24 Mar '11

24 Mar '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On 24 Mar 2011, at 01:51, Antoine Missout wrote: > What is the mechanism used by NSWorkspace exactly ? I'm not sure what more you want than what I wrote in my previous email: >> AppKit sends [NSWorkspaceWillPowerOffNotification]in response to a 'quit' Apple event that has the 'why?' attribute, implying that the app is being quit by loginwindow in preparation for restart or shutdown. > What is the proper answer to the original question, ie getting the shutdown event in a global context daemon ? I don't have a good answer. 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.… This email sent to site_archiver(a)lists.apple.com

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Re: How to tell if system shutdown is in process
by Quinn "The Eskimo!" 24 Mar '11

24 Mar '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On 24 Mar 2011, at 04:55, Brian Bergstrand wrote: > Use IOKit, specifically, IORegisterForSystemPower(). In the callback you provide check for kIOMessageSystemWillPowerOff and kIOMessageSystemWillRestart. In general IORegisterForSystemPower is fine. However, the header docs for these two events contain the text "Never delivered to user space notification clients.", leading me to believe that they won't work for a daemon. Probably worth a try though. QA1340 has code that you can easily adapt to create a simple test program. <http://developer.apple.com/library/mac/#qa/qa1340/_index.html> 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.… This email sent to site_archiver(a)lists.apple.com

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Re: How to tell if system shutdown is in process
by Brian Bergstrand 24 Mar '11

24 Mar '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha1; c=relaxed; d=classicalguitar.net; h= subject:mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; s= classicalguitar.net; bh=LHmC88iP8wWlheeiI4eku2O5vik=; b=lFzfaPHv epVotwhFg11hOMHn0NNBEns4u9Rwlul2ssqnLcrXDMLtN0xgAM3eZCtO5Zbi1BpW Jr4S+/LYWmcPbL8WMuPX4PpPKuzsyB5MsF/bwcG6Ll+EZqDQdfC50S1eZP8R5puN xTPojx0ccJW3tH+CZ37QzwyEUraJlIz5Y4w= Domainkey-signature: a=rsa-sha1; c=nofws; d=classicalguitar.net; h=subject :mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; q=dns; s= classicalguitar.net; b=KRAquclt3G3yaxhq9FuULen7xu9aCBJk7r+/CWHDZ W5jj5W0y1ghSrlPc7ay1V0FpYGgtKBr8LaKir4OYDb/3qPztMgzyYLbtg4yrYEu4 onBEiH/ZvnaYjEelt9CczyMg3/3qNz26tCz1/qvgQ0JSy+tSM1kl7Cjf718Yc5wJ wU= Use IOKit, specifically, IORegisterForSystemPower(). In the callback you provide check for kIOMessageSystemWillPowerOff and kIOMessageSystemWillRestart. p.s. Remember to register the notification port you get back with a run loop or your callback will never get called. On Mar 23, 2011, at 8:51 PM, Antoine Missout wrote: > While AppKit shouldn't be used in a global context daemon, you can always have a user-context agent and use something to communicate between the agent and the daemon (nsmachport...). > > But that's a really ugly solution to the problem. > > What is the mechanism used by NSWorkspace exactly ? > > What is the proper answer to the original question, ie getting the shutdown event in a global context daemon ? > > - Antoine > > > > On 2011-03-23, at 17:11, Quinn The Eskimo! wrote: > >> >> On 23 Mar 2011, at 18:03, Jerry Krinock wrote: >> >>> The suggestion there is to use NSWorkspaceWillPowerOffNotification. >> >> NSWorkspace is not the droid you're looking for. AppKit sends it in response to a 'quit' Apple event that has the 'why?' attribute, implying that the app is being quit by loginwindow in preparation for restart or shutdown. This doesn't really help you. >> >> When you say "started automatically by launchd", do you mean the global system launchd (that is, pid 1) or some per-user launchd? If you're started by the global launchd, you're running in a daemon context and you should not be linking with AppKit (per the rules outlined in Technote 2083 "Daemons and Agents"). >> >> <http://developer.apple.com/library/mac/#technotes/tn2005/tn2083.html> >> >> 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.… This email sent to site_archiver(a)lists.apple.com

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Re: How to tell if system shutdown is in process
by Antoine Missout 24 Mar '11

24 Mar '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com While AppKit shouldn't be used in a global context daemon, you can always have a user-context agent and use something to communicate between the agent and the daemon (nsmachport...). But that's a really ugly solution to the problem. What is the mechanism used by NSWorkspace exactly ? What is the proper answer to the original question, ie getting the shutdown event in a global context daemon ? - Antoine On 2011-03-23, at 17:11, Quinn The Eskimo! wrote: > > On 23 Mar 2011, at 18:03, Jerry Krinock wrote: > >> The suggestion there is to use NSWorkspaceWillPowerOffNotification. > > NSWorkspace is not the droid you're looking for. AppKit sends it in response to a 'quit' Apple event that has the 'why?' attribute, implying that the app is being quit by loginwindow in preparation for restart or shutdown. This doesn't really help you. > > When you say "started automatically by launchd", do you mean the global system launchd (that is, pid 1) or some per-user launchd? If you're started by the global launchd, you're running in a daemon context and you should not be linking with AppKit (per the rules outlined in Technote 2083 "Daemons and Agents"). > > <http://developer.apple.com/library/mac/#technotes/tn2005/tn2083.html> > > 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/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

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Re: How to tell if system shutdown is in process
by Quinn "The Eskimo!" 23 Mar '11

23 Mar '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On 23 Mar 2011, at 18:03, Jerry Krinock wrote: > The suggestion there is to use NSWorkspaceWillPowerOffNotification. NSWorkspace is not the droid you're looking for. AppKit sends it in response to a 'quit' Apple event that has the 'why?' attribute, implying that the app is being quit by loginwindow in preparation for restart or shutdown. This doesn't really help you. When you say "started automatically by launchd", do you mean the global system launchd (that is, pid 1) or some per-user launchd? If you're started by the global launchd, you're running in a daemon context and you should not be linking with AppKit (per the rules outlined in Technote 2083 "Daemons and Agents"). <http://developer.apple.com/library/mac/#technotes/tn2005/tn2083.html> 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.… This email sent to site_archiver(a)lists.apple.com

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

23 Mar '11

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com On 2011 Mar 22, at 17:12, Antoine Missout wrote: > Check this: > http://stackoverflow.com/questions/1321219/receiving-power-notifications-es… Thank you, Antoine. The suggestion there is to use NSWorkspaceWillPowerOffNotification. I didn't think to check Cocoa for this! Anyhow, NSWorkspaceWillPowerOffNotification doesn't seem to be received by my tool, at least not before it is killed. Another programmer reported in 2007 [1] that NSWorkspaceWillPowerOffNotification seems to not be sent to non-GUI programs, and they were going to report it as a bug. At the end of this message I've pasted in the code of a little test tool. It registers for NSWorkspaceWillPowerOffNotification and also installs a signal handler for SIGTERM, logging when either are received. And it logs a heartbeat every 50 milliseconds so I can see when it was killed. To make sure that my test process would not be killed when its parent Terminal.app or Xcode.app was quit, I wrote a launchd plist for it, and launched my test process with launchctl. Then I launched a dozen or so big apps, leaving a dirty document in one of them. I clicked Shut Down, got the confirmation dialog, and clicked Shut Down at 00:00 min:sec. Here's what happened… 00:04 Dialog appears asking me about the dirty document. I don't respond. 00:09 Test tool receives SIGTERM 00:30 I respond to the dirty document dialog with "Don't Save" 00:30 Test tool is killed (heartbeats stop) 00:35 Display goes to all blue, spinning progress indicator appears NSWorkspaceWillPowerOffNotification was never received. Can anyone see anything wrong with my code? Now, I suspect that if I did this with no other apps open, the time between SIGTERM and kill might be less than a second. I also received a reply off-list from Jerry Jorgensen explaining a robust approach of doing a safe save, leaving a file to indicate if my task was interrupted, etc. I might do that in addition to handling SIGTERM. Also, it would be nice if there were a function in the API which would tell me BOOL IsShutdownInProgress(). Jerry Krinock [1] http://www.cocoabuilder.com/archive/cocoa/187479-user-shutdown-or-logout.ht… MY TEST TOOL…………………………………………… #import <Foundation/Foundation.h> #import <AppKit/AppKit.h> @interface Shutdowner : NSObject {} @end @implementation Shutdowner - (void) shutItDown:(NSNotification*)note { NSLog(@"Got shutdown"); } - (void)tickTimer:(NSTimer*)timer { NSRange hmsRange = NSMakeRange(11,8) ; NSString* hms = [[[NSDate date] description] substringWithRange:hmsRange] ; NSTimeInterval nowTime = [NSDate timeIntervalSinceReferenceDate] ; NSInteger nowSecs = (int)nowTime ; NSInteger millisecs = (nowTime - nowSecs) * 1000 ; NSString* s = [NSString stringWithFormat:@"%@.%d", hms, millisecs] ; NSLog(@"Time = %@ seconds", s) ; } @end void handleSIGTERM(int signum) { NSLog(@"Got signal %d", signum) ; } int main (int argc, const char * argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; Shutdowner *shutdowner = [[Shutdowner alloc] init]; // Add signal handler for SIGTERM (void)signal(SIGTERM, handleSIGTERM) ; // Register to observe shutdown notification NSNotificationCenter* wnc = [[NSWorkspace sharedWorkspace] notificationCenter] ; [wnc addObserver:shutdowner selector:@selector(shutItDown:) name:NSWorkspaceWillPowerOffNotification object:nil]; // Heartbeat NSTimer* t = [NSTimer scheduledTimerWithTimeInterval:0.05 target:shutdowner selector:@selector(tickTimer:) userInfo:nil repeats:YES] ; // Run [[NSRunLoop currentRunLoop] run] ; // Clean up [t invalidate] ; [wnc removeObserver:shutdowner] ; [shutdowner release] ; [pool release] ; return 0 ; } _______________________________________________ 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

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Re: Build SharedIP open source project on MAC OS X
by Quinn "The Eskimo!" 23 Mar '11

23 Mar '11

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com On 23 Mar 2011, at 05:35, Deena Awate wrote: > I want a solution that works irrespective of the mail client on that machine. OK. However, my Mail account is configured to use TLS and only TLS, meaning that it just won't with your setup. You would either have to assume your own TLS identity, in which case Mail will shout very loudly about impostors, or you won't be able to scan my mail. So there's no possible way to meet your goal for all users, and you have to choose where to compromise, and I don't think it's wise for you to tell users to disable TLS. 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.… This email sent to site_archiver(a)lists.apple.com

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Re: Build SharedIP open source project on MAC OS X
by Deena Awate 23 Mar '11

23 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=yahoo.com; s=s1024; t=1300858541; bh=5MBJhuPAdgYR7nB4I2J2A0yYfjkHI8T65vyuyoSY2vg=; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=VtSvAqhRKJAl/PlozEhlgZ7BxFH3QAI5/qNWirD0oBcQ9yMPDOCc7Fd1+KwlApSVOIhaovxkfK73GmBpaf4ngCZX5Nlt59WlsFj4UtZzuyK058n/Z+2WXAxSdstZSga873ZAOLEOQd4lrthft30Fa4qdK7xNw8LTx1zxaFuiXA4= Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=6imS0hscONDqZrdOwjUntlCCGXAf+CTqMwOoMJOdU+3qOLmOtyiMrzGb8hLLPVGzcN2Bb2XuuhG6Ryhrxnw8tsQGceQjnwMj8i7S3lY9+pGJ5x7M20OJPhJWcnYhIDa8ei3R/4jN2dYNuUraNom4NJYRH8MAFYD9x4ygLJq1fao=; _______________________________________________ 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

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