January 2009 - Darwin-dev - lists.apple.com

Re: Unmount using DADiskUnmount
by Rakesh Singhal 15 Jan '09

15 Jan '09

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=o4k08L5lFUKYh/UqMw7a1PTkWz0SEElkOewHDNuNMVg=; b=Fk3MZcB0isOpGaH7zBY5FrSONgesGcyTQUFgaYZCI7JN1Vz18cKoLaEwYhJPZYvh1I V6mRGxGzBhLYHvUGT21MqJj63LiiQkZ1dtbIcPmKbIIVOd2jw9c9Q67ZEboz4DpA1VcE iFERsEoMmsaroGs2GKUIzqGVAILn/xf8uz+Qw= 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=cyDdD/nG6o+WVD2FSEA0EaH83CO8eo8zvwlbf7hqNiA8OppHtTu6TtQgXsjNjUD3St qbjnfcUwiPug+uTujDwKa0KfSlNLph2V542ZyFf8upirvm+YpwaboR5zx2boqJMURQk8 bIbfrDlyQ2iTZAtoDpLkutizHt6tXdKm/1qhs= Hi Dan, Thanks. Now I called the CFRunLoopRun() and it is working fine. Still I have one thing to know that when my pendrive is busy then it is taking around 5-8 seconds to call the callback function. I think this interval is very high. Is there anyway to call callback method to be called immediately? Regards rksinghal On Thu, Jan 15, 2009 at 11:42 AM, Rakesh Singhal <rakesh.singhal(a)gmail.com> wrote: > Hi Dan, > > In given code if you see I have called DASessionScheduleWithRunLoop() > after DASessionCreate() method. CFRunLoopRun() was called in starting > of my code. Does it make any difference if CFRunLoopRun() was called > on main thread and unmount functionality is implemented on another > thread? > > In acse of there is no pendrive, my callback function is getting > called, thats why I am not able to understand the things. > > Regards > > On Thu, Jan 15, 2009 at 11:33 AM, Dan Markarian <markarian(a)apple.com> wrote: >> Hey Rakesh, >> >> You need to schedule the session on a run loop with >> DASessionScheduleWithRunLoop() and run the run loop with CFRunLoopRun(). >> >> Dan >> >> On 14 Jan 2009, at 9:36 PM, Rakesh Singhal wrote: >> >>> Hi all, >>> >>> It is a daemon application, in which I am ejecting a USB pendrive. I >>> am using following code(code to unmount) to unmount it. Now, my >>> callback function is not getting called. It gets called only in one >>> case when there is no pendrive and I call DADiskUnmount. >>> >>> Please advice me where I am missing something or mistaking. >>> >>> main() >>> { >>> DADiskRef disk = NULL; >>> DASessionRef session = NULL; >>> session = DASessionCreate ( kCFAllocatorDefault ); >>> if(session == NULL) >>> { >>> return false; >>> } >>> DASessionScheduleWithRunLoop(session, CFRunLoopGetCurrent(), >>> kCFRunLoopDefaultMode); >>> disk = DADiskCreateFromBSDName ( kCFAllocatorDefault, session, diskName); >>> if(disk == NULL) >>> return false; >>> >>> DADiskUnmount(disk, kDADiskUnmountOptionWhole, >>> CPCSServerSocket::SafeRemovalCallback, NULL); >>> return true; >>> } >>> >>> void CPCSServerSocket::SafeRemovalCallback( DADiskRef disk, >>> DADissenterRef dissenter, void * context ) >>> { >>> printf("CPCSServerSocket::SafeRemovalCallback disk-%p >>> dissenter-%p\n", disk, dissenter); >>> } >>> >>> Thanks in advance. >>> >>> Regards >>> rksinghal >>> _______________________________________________ >>> 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/markarian%40apple.com >>> >>> This email sent to markarian(a)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: Unmount using DADiskUnmount
by Rakesh Singhal 15 Jan '09

15 Jan '09

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=FgUtLUPigLNvoR7qyXqDe3Mygq52rx7fobCO4QBz3Bk=; b=RON5K2YA0Sg1PzCuOqTe/8exbcZTbdCe0a763/W8me8NEja9LZX8SGkLuArzoIgzAs aJiimP47ko9sTGZuYGu+3S0T1AguKNsYWNDzFSHABFtKSouelqvo1e57LkSfkN1oUrnK kYpdMkJKLo7PstzZJiRFVX1pLacyApLvDXm4s= 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=hLfECz5HkZXTVuKYQIyim5WoGrhspoc0OLTCE/Gk87mK0orbfZl+PQUIk1cbA46rX2 j0goq+plbq5nz4Cwm2gMNagWQBiOFMbrBcLQLLnsc6Y2SY/0Obb4gmFvb1GZslTitzXC eTdDlGcBwLjzdNGG5gTKpbXn2BG/jhNrHaV4Q= Hi Dan, In given code if you see I have called DASessionScheduleWithRunLoop() after DASessionCreate() method. CFRunLoopRun() was called in starting of my code. Does it make any difference if CFRunLoopRun() was called on main thread and unmount functionality is implemented on another thread? In acse of there is no pendrive, my callback function is getting called, thats why I am not able to understand the things. Regards On Thu, Jan 15, 2009 at 11:33 AM, Dan Markarian <markarian(a)apple.com> wrote: > Hey Rakesh, > > You need to schedule the session on a run loop with > DASessionScheduleWithRunLoop() and run the run loop with CFRunLoopRun(). > > Dan > > On 14 Jan 2009, at 9:36 PM, Rakesh Singhal wrote: > >> Hi all, >> >> It is a daemon application, in which I am ejecting a USB pendrive. I >> am using following code(code to unmount) to unmount it. Now, my >> callback function is not getting called. It gets called only in one >> case when there is no pendrive and I call DADiskUnmount. >> >> Please advice me where I am missing something or mistaking. >> >> main() >> { >> DADiskRef disk = NULL; >> DASessionRef session = NULL; >> session = DASessionCreate ( kCFAllocatorDefault ); >> if(session == NULL) >> { >> return false; >> } >> DASessionScheduleWithRunLoop(session, CFRunLoopGetCurrent(), >> kCFRunLoopDefaultMode); >> disk = DADiskCreateFromBSDName ( kCFAllocatorDefault, session, diskName); >> if(disk == NULL) >> return false; >> >> DADiskUnmount(disk, kDADiskUnmountOptionWhole, >> CPCSServerSocket::SafeRemovalCallback, NULL); >> return true; >> } >> >> void CPCSServerSocket::SafeRemovalCallback( DADiskRef disk, >> DADissenterRef dissenter, void * context ) >> { >> printf("CPCSServerSocket::SafeRemovalCallback disk-%p >> dissenter-%p\n", disk, dissenter); >> } >> >> Thanks in advance. >> >> Regards >> rksinghal >> _______________________________________________ >> 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/markarian%40apple.com >> >> This email sent to markarian(a)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: Unmount using DADiskUnmount
by Dan Markarian 15 Jan '09

15 Jan '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hey Rakesh, Dan On 14 Jan 2009, at 9:36 PM, Rakesh Singhal wrote: Hi all, It is a daemon application, in which I am ejecting a USB pendrive. I am using following code(code to unmount) to unmount it. Now, my callback function is not getting called. It gets called only in one case when there is no pendrive and I call DADiskUnmount. Please advice me where I am missing something or mistaking. DADiskUnmount(disk, kDADiskUnmountOptionWhole, CPCSServerSocket::SafeRemovalCallback, NULL); return true; } void CPCSServerSocket::SafeRemovalCallback( DADiskRef disk, DADissenterRef dissenter, void * context ) { printf("CPCSServerSocket::SafeRemovalCallback disk-%p dissenter-%p\n", disk, dissenter); } Thanks in advance. _______________________________________________ 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… You need to schedule the session on a run loop with DASessionScheduleWithRunLoop() and run the run loop with CFRunLoopRun(). main() { DADiskRef disk = NULL; DASessionRef session = NULL; session = DASessionCreate ( kCFAllocatorDefault ); if(session == NULL) { return false; } DASessionScheduleWithRunLoop(session, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode); disk = DADiskCreateFromBSDName ( kCFAllocatorDefault, session, diskName); if(disk == NULL) return false; Regards rksinghal _______________________________________________ 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/markarian %40apple.com This email sent to markarian(a)apple.com This email sent to site_archiver(a)lists.apple.com

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Unmount using DADiskUnmount
by Rakesh Singhal 15 Jan '09

15 Jan '09

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:mime-version:content-type:content-transfer-encoding :content-disposition; bh=cvwPtG+O1JVo64w9KRusNpSm1HDBZVoRb/cSdDuq9vo=; b=llSM09v4G2mfaMWRZoacqhYfNtbJEDfKyfZN5pVxjtCI8Ot+MTxkAAt5wHtqQNncZK SA1rvdGwQQgIXVIfNeu0Q6QOZNE4F5MDwGc1zcaiD9PvpGPsR+FZqScLxYmhelzqy5Vn Yj3IvtNReuEGzED8NMyO5UhjQsM00fJnam0ig= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:mime-version:content-type :content-transfer-encoding:content-disposition; b=LITKG7OCDaI7uAyrQ9tfeh2M2F4/0IXnvtEqxE3Uwdehm6P2k8jpNQ9jl5rFpyybs8 8iSUplFVinxU1TNboVw/UmhXl078ubOpVuRA6DPG5EYF8CRlzEsC9pP1zL+lJv9XZnM1 gEAcll78X5esqmt2yqtkRNc+L1YeLxHPYLdzw= Hi all, It is a daemon application, in which I am ejecting a USB pendrive. I am using following code(code to unmount) to unmount it. Now, my callback function is not getting called. It gets called only in one case when there is no pendrive and I call DADiskUnmount. Please advice me where I am missing something or mistaking. main() { DADiskRef disk = NULL; DASessionRef session = NULL; session = DASessionCreate ( kCFAllocatorDefault ); if(session == NULL) { return false; } DASessionScheduleWithRunLoop(session, CFRunLoopGetCurrent(), kCFRunLoopDefaultMode); disk = DADiskCreateFromBSDName ( kCFAllocatorDefault, session, diskName); if(disk == NULL) return false; DADiskUnmount(disk, kDADiskUnmountOptionWhole, CPCSServerSocket::SafeRemovalCallback, NULL); return true; } void CPCSServerSocket::SafeRemovalCallback( DADiskRef disk, DADissenterRef dissenter, void * context ) { printf("CPCSServerSocket::SafeRemovalCallback disk-%p dissenter-%p\n", disk, dissenter); } Thanks in advance. Regards rksinghal _______________________________________________ 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: Launch a user-process from daemon
by Eli Bach 15 Jan '09

15 Jan '09

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:from:to :in-reply-to:content-type:content-transfer-encoding:subject :mime-version:date:references:x-mailer; bh=Cuor0GMfYWfw5Xe4KSk3P6iAxPXZDSMwkN+Gvk4bWlo=; b=Z5hbVkOxVpi2O5vONQ6Nz0vtm229aXazy/0kXE2W9959AEVqF3qL1nQCxXo70pX36l BJi8A35nk+/1+Gp51rnsOn7NOhWItUIhEUWYHED7L9hkn7pNqe7YzTfmN1UN52cuRkAY Sf8mk9G0LqNpJxLfwuh4VqLfY1r+fWPzrrltc= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:from:to:in-reply-to:content-type :content-transfer-encoding:subject:mime-version:date:references :x-mailer; b=uiXwL3FdZjQ8WpIFJPDjCS1p0YSsKUkv44+pyn+u33hLZjIZy2RoPAyj0d9jpJz2wI 2RsG2KJ4DtA5KgkUdbIeeun1tugXn9uB8lmCbwqkWOOAV3ywwJ0MIAlsa47gEJgR5+Cm zPC6op3w1dWruXFOyLrdVtlm5keERLJFNDdpo= On Jan 14, 2009, at 6:56 PM, Rakesh Singhal wrote: Hi Jason, Thanks a lot. I have two applications, daemon application and GUI. Constraints: First constraint is daemon launches GUI whenever it requires. Daemon checks for a particular USB device and then it launches the GUI. If at boot time, device is already plugged-in then it will launch GUI in starting only. Second I can not make changes in GUI code, it will be launched by daemon application. Eli _______________________________________________ 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… First, what does "launch GUI in starting only" mean? Second, have you decided which user gets to see the GUI application when multiple users are logged in and the device is plugged in? And when nobody is logged in? If I use daemon as an agent then it is able to launch GUI, but I can not use my daemon application as an agents cause I want two things: 1. Only one daemon for all logins. 2. I do not want system to close daemon application, when any user logs out. You would probably find the answer if you did some searching on lists.apple.com, as bizarrely, other people have done what you appear to want to do. However, to do your design work for you, I would say you probably want to create two daemons. 1 daemon, executed using launchd from an entry in /Library/ LaunchDaemons/ This will run in the login context, and should remain running always 1 daemin, executed using launchd from an entry in /Library/ LaunchAgents/ (or possibly ~/Library/LaunchAgents/ if you only want the GUI launched for a specific user) This will run when each user logs in (so, if multiple users are logged in, multiple processes will be executed). This will automatically be terminated when the user logs out, and is run in the user context. This process should communicate with the 'master' daemon, and then launch the GUI application when appropriate. The methods needed to communicate between the master daemon and the per-user daemons have been mentioned on this thread, and also can be found searching lists.apple.com. This email sent to site_archiver(a)lists.apple.com

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Re: Launch a user-process from daemon
by Rakesh Singhal 15 Jan '09

15 Jan '09

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:cc:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=2a2GGG7N6C1DMKwgRhH3vBP4SWo7yqQgq5+Yi7Q6QmM=; b=iu7VTlaPBIeeODr0m9CzTl54GQGhDvx80kR8bE8lPzuBZmOjc2G3rXR9/iPzJzJVQX DehkqY4XxDoe3sfNbmScqFotp9tApnOiCa+KJBOvpGSbloys0rDbWOM3Oo0lik6WT66n xD2YkEiwvdRrvfhraMTF8jVW7XdfTsRHZXqfU= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=Rbf7e8/+cZUXtVMd/iFv+NstfnkaweEzfi7FYzo65IfdqhqGv57wQN4IMRxBFAKqWB LnfEkWT2UY7SvyCrj0nkJFbE5W4J+eSCa8zCpPJOEA7uLpKwIhlQIFMFB0GyTNo2bK3O HMBq+iOCwBsoh8TS93B64uj3d3pYNL5IDoZuk= Hi Jason, Thanks a lot. I have two applications, daemon application and GUI. Constraints: First constraint is daemon launches GUI whenever it requires. Daemon checks for a particular USB device and then it launches the GUI. If at boot time, device is already plugged-in then it will launch GUI in starting only. Second I can not make changes in GUI code, it will be launched by daemon application. If I use daemon as an agent then it is able to launch GUI, but I can not use my daemon application as an agents cause I want two things: 1. Only one daemon for all logins. 2. I do not want system to close daemon application, when any user logs out. Regards rksinghal On Wed, Jan 14, 2009 at 11:09 PM, Jason Coco <jason.coco(a)gmail.com> wrote: > > On Jan 14, 2009, at 12:22 , Rakesh Singhal wrote: > >> I have to read it completely but I would like to let you know that if >> I use LaunchAgents then my GUI is getting launch through daemon >> application. BUt I want to keep the daemon in LaunchDaemons and then I >> want to launch my GUI using daemon. > > > If this is what you want, you have to design it for this. Don't try and make > your > daemon launch a GUI. Instead, design two parts, the daemon and the GUI. > Decide > how you want them to communicate. You can use distributed objects in Cocoa, > you > could use a UD socket, you could use an IP socket... the choice is yours. > > Create the daemon and install it in /Library/LaunchDaemons. Have it listen > using whatever mechanism you decide on (UD socket, DO, heck, mach port > even), > then install the GUI part in your user's LaunchAgents section. When the user > logs on, > the GUI will be launched by launchd and can then connect to the daemon and > let it know that it just came up/get further instructions/whatever. > > That said, you should probably have a very good reason for doing this. > Generally, > when I create a daemon for some service and I want to have a GUI to interact > with > it, I /always/ let the user decide when to start and stop that GUI. For > instance, I have > written a daemon that controls a mail service. It comes up in the root > namespace and > is installed under /Library/LaunchDaemons/. It listens for management > information > on a UD socket. It uses the security framework to ensure that any user has > been > granted the system.privilege.admin right before it will respond at all. > > I then have a system panel plugin that does basic configuration. The system > panel connects over the UD socket and provides information like whether the > services is started/stopped... provides a button to recycle/stop/start the > service > and provides basic configuration information (start at launch, IP bindings, > etc.). > > Finally there is a full GUI application. This GUI can do everything that the > system > panel can do, plus it will do real-time monitoring, allow performance tweaks > and > adjustments, and do a number of other things that don't make sense in the > context > of the system panel plugin. The GUI also communicates over the same UD > socket. > > Using this design, I could easily create a text-only interface, a web > interface, or any > other number of interfaces. If I felt there was a need for remote > configuration (right > now there's a requirement /against/ that), I could add an IP socket as well > (of course, > this would then require some kind of distributed authorization to be added, > but I digress). > > Basically, Rakesh, you have to look at your problem, look at the > constraints, and look > at the users and come up with a viable solution... then start coding. That > is just > as important as writing code. In this case, Mac users generally don't want > all kinds > of stupid GUI applications popping up when they start their computer. That > is more > of a Windows thing... and most Windows users I know hate this as well (they > just > accept it more readily because before NT 3.51 there really was no service > mechanism > for applications to use)... and of course, since NT 3.51 many programmers > have been > too lazy to write proper services so the design anti-pattern continues > (although, to > be fair, this is changing). > > If you have some background process that needs to run in the context of a > user, however, > from the time they log in, you could still use this approach. You write the > daemon and > use a UD socket for communication. You then write a background-only > LaunchAgent > that does whatever it needs to do and (for simplicity) maybe exposes a > couple of DOs. Then > the control panel and/or full GUI could interact with the LaunchAgent > instead of with > the daemon directly. This still lets you do any per-user background > processing that > you might want to do AND lets the user decide whether she wants to launch a > GUI > process. > > Anyway, I hope this helps you. Jason > _______________________________________________ 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: Descriptor Passing Mac OS X 10.5.4 ( X86_64 )
by Vincent Lubet 14 Jan '09

14 Jan '09

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: Launch a user-process from daemon
by Jason Coco 14 Jan '09

14 Jan '09

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:cc:message-id:from:to :in-reply-to:content-type:content-transfer-encoding:mime-version :subject:date:references:x-mailer; bh=8AOX8uFVz7asOMgxyTK9Y3eQ8vmSRbT2FP6QF54xR2w=; b=I5cmv/kakUFcZs02NLidXoFPobtkiTLHLFdmwFUfBhgnImfjmUPt1rs9HjTIp8IWC4 tEEal9i2NH1wgGi2u/ysPn1DbKx0edaXToJtSxUVCF69obcPU0U9D+pyQ4N6hEq1IEXX IxmPBgLrGgkk7sGk5G6ykOJ81SwQdQRb+sQOY= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=cc:message-id:from:to:in-reply-to:content-type :content-transfer-encoding:mime-version:subject:date:references :x-mailer; b=Wx7VIUUPPNVRm68w21MT/2qiO7cU4gIIJbaziNgQZVS+V2YI8g9ESaF5zU+o0hpmrc 9MugK+rIjL5AW8BHbZh/6RKwMcOFK7H69M4BPvxFKYsF4D6p9FdbPSEs87wUKKjp1RIB 4ZY5BccjILxXSE6nnaMqBdbvD4/micSYjbJ+Y= On Jan 14, 2009, at 12:22 , Rakesh Singhal wrote: I have to read it completely but I would like to let you know that if I use LaunchAgents then my GUI is getting launch through daemon application. BUt I want to keep the daemon in LaunchDaemons and then I want to launch my GUI using daemon. Anyway, I hope this helps you. Jason _______________________________________________ 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… If this is what you want, you have to design it for this. Don't try and make your daemon launch a GUI. Instead, design two parts, the daemon and the GUI. Decide how you want them to communicate. You can use distributed objects in Cocoa, you could use a UD socket, you could use an IP socket... the choice is yours. Create the daemon and install it in /Library/LaunchDaemons. Have it listen using whatever mechanism you decide on (UD socket, DO, heck, mach port even), then install the GUI part in your user's LaunchAgents section. When the user logs on, the GUI will be launched by launchd and can then connect to the daemon and let it know that it just came up/get further instructions/whatever. That said, you should probably have a very good reason for doing this. Generally, when I create a daemon for some service and I want to have a GUI to interact with it, I /always/ let the user decide when to start and stop that GUI. For instance, I have written a daemon that controls a mail service. It comes up in the root namespace and is installed under /Library/LaunchDaemons/. It listens for management information on a UD socket. It uses the security framework to ensure that any user has been granted the system.privilege.admin right before it will respond at all. I then have a system panel plugin that does basic configuration. The system panel connects over the UD socket and provides information like whether the services is started/stopped... provides a button to recycle/stop/start the service and provides basic configuration information (start at launch, IP bindings, etc.). Finally there is a full GUI application. This GUI can do everything that the system panel can do, plus it will do real-time monitoring, allow performance tweaks and adjustments, and do a number of other things that don't make sense in the context of the system panel plugin. The GUI also communicates over the same UD socket. Using this design, I could easily create a text-only interface, a web interface, or any other number of interfaces. If I felt there was a need for remote configuration (right now there's a requirement /against/ that), I could add an IP socket as well (of course, this would then require some kind of distributed authorization to be added, but I digress). Basically, Rakesh, you have to look at your problem, look at the constraints, and look at the users and come up with a viable solution... then start coding. That is just as important as writing code. In this case, Mac users generally don't want all kinds of stupid GUI applications popping up when they start their computer. That is more of a Windows thing... and most Windows users I know hate this as well (they just accept it more readily because before NT 3.51 there really was no service mechanism for applications to use)... and of course, since NT 3.51 many programmers have been too lazy to write proper services so the design anti-pattern continues (although, to be fair, this is changing). If you have some background process that needs to run in the context of a user, however, from the time they log in, you could still use this approach. You write the daemon and use a UD socket for communication. You then write a background-only LaunchAgent that does whatever it needs to do and (for simplicity) maybe exposes a couple of DOs. Then the control panel and/or full GUI could interact with the LaunchAgent instead of with the daemon directly. This still lets you do any per-user background processing that you might want to do AND lets the user decide whether she wants to launch a GUI process. This email sent to site_archiver(a)lists.apple.com

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Re: Launch a user-process from daemon
by Rakesh Singhal 14 Jan '09

14 Jan '09

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=41oWATp5jypmYlwI8TX7z3ggZyuZJtnQSU4pL8ZQz7k=; b=ZNAVpDrpnnoqkspc/6kGZNZyPilwxcWl1feLP2daFtCzBIbUbPMYlma/mCacjpOLq5 T7P29CbXwQBXHwYTH8GNir5hAxVKnwIycrF/RLch1uyM/CPyvVov6iiJaM4h+LOeeZih PgClxfa2WZIRBeejaJB74LBhC6PbyEAblC9Vc= 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=cnwly0caHMcgiwBlRa246jFJrzpqbcfiv7frzc7li+GL9W+0YZ4nYSplCsU5zgQaE2 GQ8P0wX1qpmoBy7D9bVg2/BNLseJWKhfHSuEq7qSusiyNGY5v1Ib05aRIjtYIA7h0kGw L/5iW2AEin4/xLyqBErPaF7bBKy6fMBjOysis= I have to read it completely but I would like to let you know that if I use LaunchAgents then my GUI is getting launch through daemon application. BUt I want to keep the daemon in LaunchDaemons and then I want to launch my GUI using daemon. Regards On Wed, Jan 14, 2009 at 8:08 PM, Marc Epard <mepard(a)me.com> wrote: > On Jan 14, 2009, at 6:36 AM, Rakesh Singhal wrote: > >> I want to launch a user-process (GUI) from a daemon. > > > On Dec 15, 2008, at 6:15 AM, I suggested to you: > >> Also be sure to read TN2005 Daemons and Agents. >> >> <http://developer.apple.com/technotes/tn2005/tn2083.html> > > Have you done so? In particular, pay attention to "The Perils of the > Monolith" and "Process Manager and Launch Services". > > -Marc > > _______________________________________________ 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: Launch a user-process from daemon
by Marc Epard 14 Jan '09

14 Jan '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jan 14, 2009, at 6:36 AM, Rakesh Singhal wrote: On Dec 15, 2008, at 6:15 AM, I suggested to you: Also be sure to read TN2005 Daemons and Agents. -Marc _______________________________________________ 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 want to launch a user-process (GUI) from a daemon. <http://developer.apple.com/technotes/tn2005/tn2083.html> Have you done so? In particular, pay attention to "The Perils of the Monolith" and "Process Manager and Launch Services". This email sent to site_archiver(a)lists.apple.com

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