September 2008 - Darwin-dev

Re: launchd wrong behavior for nonexistent paths and crashed services
by Kevin Van Vechten 24 Sep '08

24 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Sep 24, 2008, at 2:41 AM, Stéphane Sudre wrote: On Sep 15, 2008, at 7:01 PM, Terry Lambert wrote: Hello all, launchd tries to restart indefinitely some service in the following two cases: 1) launchd plist with wrong ProgramArguments key " Throttling respawn: Will start in 10 seconds posix_spawnp("<ProgramArguments>", ...): No such file or directory " The problem is very annoying if some other application waits for this service to start. 1. Turn AirPort On 2. Enable Internet Sharing via AirPort 3. Turn AirPort Off 4. Restart - Kevin _______________________________________________ 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… On Sep 15, 2008, at 9:20 AM, Cristescu Alexandru <cristescualx(a)yahoo.com > wrote: I don't see a reasonable failure mode for this case, since if program B needs service A, it needs service A. You might argue for a cascade failure, where if service A won't load, B should fail in its attempt to contact A rather than launchd answering the phone and being unable to hand off the connection to A. On the other hand, you could argue that while what it's trying to launch doesn't currently exist, it will in the future as a result of a not yet completed operation (a network mount, a disk mount for a disk currently being fsck'ed, a thumb drive containing your ssh keys being inserted, or the binary is in fact being generated, etc.). You could also argue that "the plist needs fixed" and/or "do not install busted plists in the first place". Since there's no way to distinguish a transient vs. Permanent failure, and you presumably intentionally installed it, you intended launchd to keep trying. Just to point out a real case where trying to relaunch every time without a max retries is problematic: In Mac OS X 10.5.4 (I haven't checked if this has been fixed in 10.5.5), AFAIK, if you do the following things: Your console.log and system.log will be filled with tons of these records: Sep 24 11:37:59 xxxxxxxx InternetSharing[513]: Internet Sharing shutting down Sep 24 11:37:59 xxxxxxxx com.apple.launchd[1] (com.apple.InternetSharing[513]): Exited with exit code: 1 Sep 24 11:37:59 xxxxxxxx com.apple.launchd[1] (com.apple.InternetSharing): Throttling respawn: Will start in 10 seconds Sep 24 11:38:09 xxxxxxxx InternetSharing[514]: Internet Sharing shutting down Sep 24 11:38:09 xxxxxxxx com.apple.launchd[1] (com.apple.InternetSharing[514]): Exited with exit code: 1 Sep 24 11:38:09 xxxxxxxx com.apple.launchd[1] (com.apple.InternetSharing): Throttling respawn: Will start in 10 seconds Using the SuccessfulExit condition is useful in cases like this. If InternetSharing sees there's nothing to do, and exits successfully, the job wont' be restarted until another condition is met. Please file a radar on this specific issue. This email sent to site_archiver(a)lists.apple.com

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Re: launchd wrong behavior for nonexistent paths and crashed services
by Terry Lambert 24 Sep '08

24 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Thanks, -- Terry On Sep 24, 2008, at 2:41 AM, Stéphane Sudre <ssudre(a)intego.com> wrote: On Sep 15, 2008, at 7:01 PM, Terry Lambert wrote: Hello all, launchd tries to restart indefinitely some service in the following two cases: 1) launchd plist with wrong ProgramArguments key " Throttling respawn: Will start in 10 seconds posix_spawnp("<ProgramArguments>", ...): No such file or directory " The problem is very annoying if some other application waits for this service to start. 1. Turn AirPort On 2. Enable Internet Sharing via AirPort 3. Turn AirPort Off 4. Restart _______________________________________________ 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… Please file a bug against interface disabling not automatically disabling Internet sharing via the interface being disabled. On Sep 15, 2008, at 9:20 AM, Cristescu Alexandru <cristescualx(a)yahoo.com > wrote: I don't see a reasonable failure mode for this case, since if program B needs service A, it needs service A. You might argue for a cascade failure, where if service A won't load, B should fail in its attempt to contact A rather than launchd answering the phone and being unable to hand off the connection to A. On the other hand, you could argue that while what it's trying to launch doesn't currently exist, it will in the future as a result of a not yet completed operation (a network mount, a disk mount for a disk currently being fsck'ed, a thumb drive containing your ssh keys being inserted, or the binary is in fact being generated, etc.). You could also argue that "the plist needs fixed" and/or "do not install busted plists in the first place". Since there's no way to distinguish a transient vs. Permanent failure, and you presumably intentionally installed it, you intended launchd to keep trying. Just to point out a real case where trying to relaunch every time without a max retries is problematic: In Mac OS X 10.5.4 (I haven't checked if this has been fixed in 10.5.5), AFAIK, if you do the following things: Your console.log and system.log will be filled with tons of these records: Sep 24 11:37:59 xxxxxxxx InternetSharing[513]: Internet Sharing shutting down Sep 24 11:37:59 xxxxxxxx com.apple.launchd[1] (com.apple.InternetSharing[513]): Exited with exit code: 1 Sep 24 11:37:59 xxxxxxxx com.apple.launchd[1] (com.apple.InternetSharing): Throttling respawn: Will start in 10 seconds Sep 24 11:38:09 xxxxxxxx InternetSharing[514]: Internet Sharing shutting down Sep 24 11:38:09 xxxxxxxx com.apple.launchd[1] (com.apple.InternetSharing[514]): Exited with exit code: 1 Sep 24 11:38:09 xxxxxxxx com.apple.launchd[1] (com.apple.InternetSharing): Throttling respawn: Will start in 10 seconds This email sent to site_archiver(a)lists.apple.com

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Re: launchd wrong behavior for nonexistent paths and crashed services
by Stéphane Sudre 24 Sep '08

24 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Sep 15, 2008, at 7:01 PM, Terry Lambert wrote: Hello all, launchd tries to restart indefinitely some service in the following two cases: 1) launchd plist with wrong ProgramArguments key " Throttling respawn: Will start in 10 seconds posix_spawnp("<ProgramArguments>", ...): No such file or directory " The problem is very annoying if some other application waits for this service to start. 1. Turn AirPort On 2. Enable Internet Sharing via AirPort 3. Turn AirPort Off 4. Restart _______________________________________________ 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… On Sep 15, 2008, at 9:20 AM, Cristescu Alexandru <cristescualx(a)yahoo.com > wrote: I don't see a reasonable failure mode for this case, since if program B needs service A, it needs service A. You might argue for a cascade failure, where if service A won't load, B should fail in its attempt to contact A rather than launchd answering the phone and being unable to hand off the connection to A. On the other hand, you could argue that while what it's trying to launch doesn't currently exist, it will in the future as a result of a not yet completed operation (a network mount, a disk mount for a disk currently being fsck'ed, a thumb drive containing your ssh keys being inserted, or the binary is in fact being generated, etc.). You could also argue that "the plist needs fixed" and/or "do not install busted plists in the first place". Since there's no way to distinguish a transient vs. Permanent failure, and you presumably intentionally installed it, you intended launchd to keep trying. Just to point out a real case where trying to relaunch every time without a max retries is problematic: In Mac OS X 10.5.4 (I haven't checked if this has been fixed in 10.5.5), AFAIK, if you do the following things: Your console.log and system.log will be filled with tons of these records: Sep 24 11:37:59 xxxxxxxx InternetSharing[513]: Internet Sharing shutting down Sep 24 11:37:59 xxxxxxxx com.apple.launchd[1] (com.apple.InternetSharing[513]): Exited with exit code: 1 Sep 24 11:37:59 xxxxxxxx com.apple.launchd[1] (com.apple.InternetSharing): Throttling respawn: Will start in 10 seconds Sep 24 11:38:09 xxxxxxxx InternetSharing[514]: Internet Sharing shutting down Sep 24 11:38:09 xxxxxxxx com.apple.launchd[1] (com.apple.InternetSharing[514]): Exited with exit code: 1 Sep 24 11:38:09 xxxxxxxx com.apple.launchd[1] (com.apple.InternetSharing): Throttling respawn: Will start in 10 seconds This email sent to site_archiver(a)lists.apple.com

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Re: Apple remote driver
by Jaime Magiera 24 Sep '08

24 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Sep 23, 2008, at 2:49 PM, David M. Cotter wrote: here you go: http://www.martinkahr.com/2007/07/26/remote-control-wrapper-20/index.html just food for thought, Jaime Magiera Sensory Research http://www.sensoryresearch.net _______________________________________________ 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… Yeah, I've seen this and also done some reverse engineering myself. However, it's not the same thing as having a true public API. With a public API things are standardized and somewhat frozen. Playing with unsupported/non-public API is playing with fire if you want your app to be solid in the commercial market. If Apple decides to change something, you could be left without recourse. I speak from experience. For a while I was working for a company whom used unsupported ways of inserting applescript dictionaries into applications. Things changed between Tiger and Leopard, and that functionality is now hosed. Avoiding such situations is probably a sound business and technical decision. This email sent to site_archiver(a)lists.apple.com

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Re: Apple remote driver
by David M. Cotter 23 Sep '08

23 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com here you go: http://www.martinkahr.com/2007/07/26/remote-control-wrapper-20/index.html _______________________________________________ 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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Manually mount device (DADiskMountWithArguments), Desktop not updated until next Finder launch
by Tim Schooley 23 Sep '08

23 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi all, The title kinda says it all. Steps to reproduce: 1) Mount a device to a specific location, using the following kind of code: DADiskMountWithArguments(disk_ref, mount_url, kDADiskMountOptionDefault, &mount_disk_callback, (void*)&mount_result, mount_args); where mount_url is a valid CFURL... 2) Look on the Desktop. There's no volume icon! :( 3) Open a Finder window. 4) Look on the Desktop. Now there's a volume icon! :D So my question is, how can I get the volume icon to appear programmatically? I've tried notifying processes of a Desktop refresh, which I'm guessing _isn't_ the way to go about it, since nothing has added the alias to the Desktop as yet... : OSStatus result = FNNotifyByPath( (const UInt8*)desktop_buf, kFNDirectoryModifiedMessage, kNilOptions) I really don't want to go down the route of sending a kAESync message either (all that effort for this little issue...). Any ideas? Thanks for any help. Kind regards, Tim _______________________________________________ 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: Apple remote driver
by Jaime Magiera 23 Sep '08

23 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Jaime Magiera Sensory Research http://www.sensoryresearch.net _______________________________________________ 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… On Sep 22, 2008, at 3:28 PM, Garth Cummings wrote: Sorry, I can't help you there. But please feel free to file an enhancement request asking for a public API for the Apple remote at <http://developer.apple.com/bugreporter >. I would like to see such a thing as well. Enhancement request on the way. This email sent to site_archiver(a)lists.apple.com

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Re: Apple remote driver
by Garth Cummings 22 Sep '08

22 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi Shayne, On Sep 22, 2008, at 11:32 AM, Shayne Wissler wrote: Hi Garth, Yes, and this is part of why I just want to write my own driver and disable Apple's. Our use of these systems is educational, and we need the remote to do a very specific thing. Is there any way I could get the source for the driver as a starting point? Or, do you have any other suggestions/recommendations? Or is Apple only consumer-oriented and doesn't like custom use of their hardware and I should just use Linux? --gc Hi Shayne, On Sep 18, 2008, at 2:55 PM, Shayne Wissler wrote: Hello, I have a very specific application where I want the remote to behave in a particular way, I need to be able to capture all button press/release events as they happen, and I do not want the remote control to activate any other program but my own (not Front Row, not volume control, nothing). --gc ____________________________________________________________________ Garth Cummings gcummings(a)apple.com Sr. Software Engineer Apple Developer Technical Support <http://developer.apple.com/technicalsupport> ____________________________________________________________________ Garth Cummings gcummings(a)apple.com Sr. Software Engineer Apple Developer Technical Support <http://developer.apple.com/technicalsupport> _______________________________________________ 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… Shayne Wissler Sorry, I can't help you there. But please feel free to file an enhancement request asking for a public API for the Apple remote at <http://developer.apple.com/bugreporter >. On Mon, Sep 22, 2008 at 12:07 PM, Garth Cummings <gcummings(a)apple.com> wrote: Just so you know, the Apple remote is unsupported for use by third- party developers. Obviously folks have figured out how it works... _______________________________________________ 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/gcummings %40apple.com This email sent to gcummings(a)apple.com This email sent to site_archiver(a)lists.apple.com

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Re: Apple remote driver
by Shayne Wissler 22 Sep '08

22 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=pChvqynU7peWjELwc4sJsvyojrxlkRfwGzOd4pkRRKM=; b=Igc/ExPGkIdWgZleqEDOe3jaMOCAzYd8kqXKm5d+BXC26Hbw+bbZ+ncR6Kilrh+SqR 3LmLaWrKkIEgF7pYNSrFNzunSZ9t8sXqx3as4n7HVi71DtAAV/82EnQEglvgQqoQLWqb Zh5CDlTZH1AM5CPp08xpGE6eJibsa9iN8lYak= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=uipIrFkeijSmqWtqLVKy0m3kZXOWFrytAcFMekE9WrBh2oz7SPS3zVbcZFPAHdlBr8 R/UCoKfKE+VMu7MDI7rl1Rchzx82CWuDvkuQ/1bFf1SeFHGaGM9lpasEv1zTz0xZ+V0N 8+HrmLfyJu70kYqPREyGzNESET4iibWLngOSw= Hi Garth, Yes, and this is part of why I just want to write my own driver and disable Apple's. Our use of these systems is educational, and we need the remote to do a very specific thing. Is there any way I could get the source for the driver as a starting point? Or, do you have any other suggestions/recommendations? Or is Apple only consumer-oriented and doesn't like custom use of their hardware and I should just use Linux? Shayne Wissler On Mon, Sep 22, 2008 at 12:07 PM, Garth Cummings <gcummings(a)apple.com> wrote: > Hi Shayne, > > On Sep 18, 2008, at 2:55 PM, Shayne Wissler wrote: > >> Hello, >> >> I have a very specific application where I want the remote to behave >> in a particular way, I need to be able to capture all button >> press/release events as they happen, and I do not want the remote >> control to activate any other program but my own (not Front Row, not >> volume control, nothing). > > Just so you know, the Apple remote is unsupported for use by third-party > developers. Obviously folks have figured out how it works... > > --gc > ____________________________________________________________________ > Garth Cummings gcummings(a)apple.com > Sr. Software Engineer > Apple Developer Technical Support > > <http://developer.apple.com/technicalsupport> > > > _______________________________________________ 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: Apple remote driver
by Garth Cummings 22 Sep '08

22 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi Shayne, On Sep 18, 2008, at 2:55 PM, Shayne Wissler wrote: Hello, I have a very specific application where I want the remote to behave in a particular way, I need to be able to capture all button press/release events as they happen, and I do not want the remote control to activate any other program but my own (not Front Row, not volume control, nothing). --gc ____________________________________________________________________ Garth Cummings gcummings(a)apple.com Sr. Software Engineer Apple Developer Technical Support <http://developer.apple.com/technicalsupport> _______________________________________________ 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… Just so you know, the Apple remote is unsupported for use by third- party developers. Obviously folks have figured out how it works... This email sent to site_archiver(a)lists.apple.com

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