December 2008 - Darwin-dev - lists.apple.com

G4OS-X upgrade?
by Allen Curtis 14 Dec '08

14 Dec '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:from:to :content-type:content-transfer-encoding:mime-version:subject:date :x-mailer; bh=fEa2p0M3bYy4HdohIgh0/52LmXSUV7iiF0JoEI75nVE=; b=FPTJdGTkP5kFFjoBp+s7CA6Z2F8flFkHI7c34oBSRyij9IrFi6eR02bng8C41741Sl TtHS+Alm70qYIviOaVwn+LWDEfjZVm9+S77pibgCiQKWTS5j6qCx7f6kEj0uOlftBO+U Gu4YCqbLhQtKRhlKlCTdQyNhwsNRaSuIymbKg= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:from:to:content-type:content-transfer-encoding :mime-version:subject:date:x-mailer; b=g6IRl3mtcl5Q5z2UuFutmSX2OTM+v+LExa6MUSV0qQolvmSaWAYlJle2qempv3/915 KBzkZo1q55QWd7SNBCbPWKsTt+cuer/BcVs3bwVGOpod7TAuQohFNXihO809RF9T50wN iUWh6AAczTKifdHIsBIghc21TB8iXK/AqaL5Q= Hello, Thanks Allen _______________________________________________ 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 have an old iBook which is "stuck" at version 10.3.9. Is it possible to upgrade this to the latest release manually? I noticed that the Darwin release for 10.5.5 says it is for both PPC and x86. This email sent to site_archiver(a)lists.apple.com

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Max value of semaphore
by Rakesh Singhal 11 Dec '08

11 Dec '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:mime-version:content-type:content-transfer-encoding :content-disposition; bh=G98WRVnIJqwTSK35ROOzSRpBG4l2C4koxGLmmPRE3Oc=; b=WlbNxvhWLXNuWyqdP0Av+kowhrxHk8Nt0/07VSqPUWu88zovIwg7L2Gn3h2nU21uOk xncstFhRPca04Fez0DidPYvy3txcF3tes7bWh7zS41qXp2SXC0QSCBGK6FUtG9btjAoX Vfd64Cz5oHP6WhHEelkW2W+7rRziV4aTlmARU= 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=QwfK++ccwey2TUVD+TxX8Ad8verf35ODGurgJc38YngiDnoJu9ez4T/aILKunmv0OT d/W2JkRTpqwWE1wzdLgl9880yUoAH03a+HB01UJq/7q6HIi9EL/5cdOL3uJyBN8VidG+ D6IYzaM55q4qZrSybMUBeC1Lo31qhKYc5Fg3Y= Hi all I am creating a semaphore using ftok, semget and then initializing. I want to change the maximum value of semaphore. I think the variable is semvmx and its value is around 32767 and I want to keep it is 3 in my case so please suggest me how to do it. 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: gdb attach
by Eli Bach 10 Dec '08

10 Dec '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:from:to :in-reply-to:content-type:content-transfer-encoding:mime-version :subject:date:references:x-mailer; bh=4AyCytJ89/Ptc0HTRdsxr/GLrFXy0kE0eAuaZDAPu8w=; b=qiNCV/Xa+tvNcARsM6vbAWc24oZVIb692uNFkl6OiB3cBzfEGuzqNaXYEFX4hjTW7X qTv1Fc5+p81UcOEIA6fynGOYQaZcL4TQxCVsEQ7lbHZRGHovQ6nMnkvdPPOCp3B3Yg1w fTUk+FX6TTRDLfcjypxN+Qeee9McndLk5FpmU= 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:mime-version:subject:date:references :x-mailer; b=xQT2TTCvnAqw2wr/uCVdO3xJDW+NVA1UiS7bALCUkwe5nKLLop6AbKrs14lTdrvxB8 JMbfQ766x9xl3QcrYkdam7Oos7MGjz6g481Qft5fUlYkLr9G4P5DMuIVnLBFJPlcONZA dBFEmqtzdpYh6jKfn8VUdp4zI1rq3tt5bTKaw= On Dec 10, 2008, at 5:42 AM, Rohitash wrote: Has anyone faced something similar ? Are there any workarounds ? _______________________________________________ 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… Folks, I have a situation where some process of mine spins , fully utilizing the cpu , and in un-interruptible wait ( state 'U') . Trying to attach gdb , to see the current backtrace of the process , makes gdb freeze.It also complains that the process with pid specified for attach to gdb is not available. Thx. Well, since it's your application, maybe try adding some logging statements, so you can narrow down what the process doing when it gets into this state? This email sent to site_archiver(a)lists.apple.com

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gdb attach
by Rohitash 10 Dec '08

10 Dec '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Organization: Oracle Corporation User-agent: Thunderbird 2.0.0.18 (Windows/20081105) Has anyone faced something similar ? Are there any workarounds ? Thx. -- Disclaimer : The statements and opinions expressed here are my own and do not necessarily represent those of Oracle Corporation. _______________________________________________ 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… Folks, I have a situation where some process of mine spins , fully utilizing the cpu , and in un-interruptible wait ( state 'U') . Trying to attach gdb , to see the current backtrace of the process , makes gdb freeze.It also complains that the process with pid specified for attach to gdb is not available. This email sent to site_archiver(a)lists.apple.com

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Re: Controlling who is shutting down a daemon
by Terry Lambert 09 Dec '08

09 Dec '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com So yes, it's possible. -- Terry _______________________________________________ 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 Dec 9, 2008, at 6:54 AM, Tom Fortmann <tfortmann(a)xcapesolutions.net> wrote: Is there a way to determine and control who is shutting down a daemon? Our daemon is launched under launchd and is restarted by launchd if we crash, but I would like to limit the graceful shutdown to just launchd/launchctl. What I am trying to avoid is someone (or some process) with root authority issuing a shutdown signal to our pid. On a similar note, does anyone know if when the system is shutting down does launchd/launchctl shutdown the daemons, or is another process used to kill the running daemons? In older systems, the process teardown is implemented interior to the reboot system call, which is normally called by launchd. In current systems, it's implemented in launchd itself. Each process us sent SIGTERM and given the opportunity to gracefully exit; if it can't do so in a reasonable time, the process is sent a SIGKILL. If that doesn't work (for example, the TH_UNINT bit is set and it's blocks in some uninterruptible part of Mach), its address space and threads are manually disassembled, rather like being eaten by Pirahnah. SIGKILL is not catchable or blockable, period, so long as it's possible to call thread_abort() on a Mach thread. So in terms of graceful shudowns, I have to guess you are talking about SIGHUP and SIGTERM. Realizing that launchctl uses a framework which is supposed to be available to third parties to talk to launchd, just as launchctl itself does, and therefore there are legitimate cases where some other program could validly shut you down, that should come in via launchd these days. In your SIGTERM handler, which you will establish by calling sigaction () instead of signal(), and for which you will specify the SA_SIGINFO flag to the sigaction structure, you can look at the si_pid field of the siginfo_t at the time of the signal to identify the sending process and therefore distinguish between a signal set to you as a result of a genuine machine exception vs. one sent on purpose by another process, and whether or not that process was launchd or something else. This is likely too restrictive in general, given per-session launchds as well. You will likely (if your daemon is written correctly) want to permit *either* PID 1 (the system launchd) *or* any process matching getppid () to send you the signal, to allow for things like common debugging cases. Additionally, if you are going to effectively ignore signals sent by other people, minimal politeness (and culprit identification) would have you log "unauthorized" signals sent to your process, the sending PID, the fact that the signal was discarded, and why it your process considered the discard justified. You may also want to include "here's how you shut me down gracefully" in the logged information. Personally, I reccomend against doing these types of checks; if something like this is happening, then the sender is not going to stop at SIGTERM (they want you gone), and launchd will be restarting you anyway, until it's informed not to, so other than stopping and restarting, there's no harm in letting it happen, at least for daemons who already drank the launchd koolaide. In general, if at all possible, machines should do what people tell them to do, even if it's a dumb thing, as long as there is no lasting harm. This email sent to site_archiver(a)lists.apple.com

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Controlling who is shutting down a daemon
by Tom Fortmann 09 Dec '08

09 Dec '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Thread-index: AclaDf/C5wYOF5dmS1+IgvNmBXDt7Q== _______________________________________________ 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: Writing on virtual serial port
by Eli Bach 09 Dec '08

09 Dec '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:from:to :in-reply-to:content-type:content-transfer-encoding:x-mailer :mime-version:subject:date:references; bh=L15bxO3H0ePGj9E7nEZMPYUIxkV7UA0qgZNAHHumic8=; b=k3mYY17xDMixDmoA7yGb8Yd09bxyRj+JktPReJqVvxoLaJelOwwDkdIEiLJYGS7rGJ NqrJhz/d+BoH/FX+nWRcDEaLzvwnwTzmExQG7NXb5xjFf/KUDV6/tCv7q34I39vr6mbu YsEk9nZYzbZwrk91cQ8bRV9HGfIGessJvWOzE= 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:x-mailer:mime-version:subject:date :references; b=hTy12pnf0mw3lh2CvbnXINdVFXeeCirE06ZtBisd08w6JaPQQsysiIodw5ExG0s5GF WMHtn2pJ+XpPh2tfOf6BUnC8Ph2IrpDtZvGOk/D4gVcZ3AaSyCNwLOENp086Q/03fLx1 eFqwfdp63sivYyZMSvDK1Mpxm4wQzzkDI5Pfg= The serial driver decided it only wanted to accept 1k of data. Eli Sent from my iPod Hi all I am writing some data on virtual serial port using write() function. If I try to write data length of < 1024 then it returns the same length but if i try to write more than 1024 bytes then it returns 1024 only. Mostly I am trying to write 1502 bytes and always it returns 1024 means it wrote only 1024 bytes. Please let me know why is it happening and what is the ... _______________________________________________ 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 just call write() again for the data that wasn't sent. Just code a loop to keep calling write until it fails or all the data is sent. On 9-Dec-08, at 12:08 AM, "Rakesh Singhal" <rakesh.singhal(a)gmail.com> wrote: This email sent to site_archiver(a)lists.apple.com

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Writing on virtual serial port
by Rakesh Singhal 09 Dec '08

09 Dec '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:mime-version:content-type:content-transfer-encoding :content-disposition; bh=w2RdI5RRoTI4Ju2j0uV93Pd1MWYzKLoMMmnl0k8ba8Q=; b=IpCtOJMLy5UhfTOtwzwEhcQzVWZcZQV6clpQYo4hoNKMnZKqc0PSVRJZ03UCang73S qqxiX5ygHXlqL9CctKlUEqMPcly1A+daroo1+h2eSVNaeX1lVWEN0W9ODUgsZg+nBTq9 EBSYyH8ufKznLlXTQQyxbsweowJ4GWF1zwGEs= 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=Mahuj+4cHTnapZG25PEZlk+Zc7GjP2YFXtmHmxRpWk/fT4FfNiojqalNETsv5DGLBK 4MGYHC1IXpvGwpeBXZbBZq/a2rdSR6GE1UogE9yZx7H3KVMORWa6g4S3SG1RTElCTRiZ gJboUVTNP761Csop/Uc4vFejCKuPjmmtJHGxw= Hi all I am writing some data on virtual serial port using write() function. If I try to write data length of < 1024 then it returns the same length but if i try to write more than 1024 bytes then it returns 1024 only. Mostly I am trying to write 1502 bytes and always it returns 1024 means it wrote only 1024 bytes. Please let me know why is it happening and what is the solution. 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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Stall on shutdown/restart after auto kext-unload
by Andy Green 08 Dec '08

08 Dec '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Thread-index: AclZUW96hDfD1iBNSiCLABNuYVcqKg== Thread-topic: Stall on shutdown/restart after auto kext-unload Earlier this year I wrote a kernel extension which includes several subclasses of storage/scsi classes. I can go into more detail if needed, but I doubt it's relevant for this problem. On some machines, if my driver is installed, the system won't shutdown - it sits spinning that circular multi-segment thing. The thing is, this only happens if there are no devices present which match my driver, or if any such devices are removed >1 minute before shutdown. This raised my suspicions about the kernel unloading my extension - I know it does that if no matching devices exist, and indeed I found that if I shut down while the kext is loaded, all is OK. If I wait until kextstat shows nothing, the system won't shutdown. However, if I kextunload manually before the shutdown, all is OK. So, very little of my code actually runs - only init(), probe() and free() in one of my classes. My driver seems to unload OK, yet the system won't shutdown. Any help would be appreciated! I've got two-machine debug up and running, but am a bit clueless how to find out why it's hanging. Any ideas? Thanks all, Andy PS problem has only been observed on OX 10.4.11 and 10.3.9 after a security update late summer/early fall. No symptoms observed on 10.5.5. Also, this doesn't seem to affect Xeon-based machines, only:- PowerMac G4 PowerMac G5 MacbookPro Core Duo MacMini Core Solo iMac Core2 Duo _______________________________________________ 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: Semaphore
by Jean-Daniel Dupas 08 Dec '08

08 Dec '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Disable ZeroLink in your build settings. http://developer.apple.com/qa/qa2001/qa1322.html Le 8 déc. 08 à 13:23, Rakesh Singhal a écrit : I have put 2 dynamic libraries in /usr/lib/ folder and trying to use them using dlopen API. It is working fine with PPC 10.4.9 but I am trying now on 10.5.4 Intel. I do knot know what is happening. It shows: Please suggest me. Thanks in advance. Regards rksinghal On Mon, Dec 1, 2008 at 10:11 AM, Rakesh Singhal <rakesh.singhal(a)gmail.com> wrote: Regards rksinghal Luke Sent from my iPhone. Yes that is my query what path to choose to make sure that it would generate same key in both dylib and app. regards Luke Sent from my iPhone. Regards rksinghal Luke Sent from my iPhone. Is it possible to use semget() without using ftok() for IPC communication? Please suggest me. Regards rksinghal On Fri, Nov 28, 2008 at 9:54 AM, Rakesh Singhal <rakesh.singhal(a)gmail.com> wrote: Thanks. Now I am using following set of APIs: ftok() semget() semop() semctl() It is working till now :) Regards rksinghal Hi all POSIX unnamed semaphores are not supported. man sem_open man semget -- Terry _______________________________________________ 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/devlists%40shadowlab.org This email sent to devlists(a)shadowlab.org _______________________________________________ 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 should never deploy a zero linked binary, and zero link no longer exists on 10.5 (and nobody misses it IMHO). dyld: Library not loaded: /Developer/Library/PrivateFrameworks/ZeroLink.framework/Versions/A/ ZeroLink Referenced from: /myProject/myApp Reason: image not found Trace/BPT trap The dylib will be installed in /usr/lib/ so I can give path "/usr/lib/libMyDylib.dylib". Yes it is a good idea. Currently both are in different folders and I am giving "./" path in both (dylib and app) and generating same key. I hope it would work. Thanks a lot. On Mon, Dec 1, 2008 at 9:48 AM, Luke Hiesterman <luketheh(a)apple.com> wrote: How about the path of the library? It must be in some known location to be loaded at runtime. On Nov 30, 2008, at 8:07 PM, Rakesh Singhal <rakesh.singhal(a)gmail.com > wrote: On Mon, Dec 1, 2008 at 9:16 AM, Luke Hiesterman <luketheh(a)apple.com> wrote: If you use the same path and same id for ftok on both processes then you will get the same key for use with semget. This is precisely the purpose of ftok. On Nov 30, 2008, at 7:15 PM, Rakesh Singhal <rakesh.singhal(a)gmail.com > wrote: Thanks. The problem I have to give file path to generate key. How will I ensure that the path I am giving will work always to generate the same key? I have one application and another is dynamic library and I want to generate the same key in both to use. On Mon, Dec 1, 2008 at 12:56 AM, Luke Hiesterman <luketheh(a)apple.com > wrote: Why exactly do you want to avoid ftok? It's a good way to generate shared keys. It's always possible to generate an integer key some other way yourself and then you just have to figure out how to communicate it across processes. You could write it to a file or send it over a socket. On Nov 30, 2008, at 3:25 AM, Rakesh Singhal <rakesh.singhal(a)gmail.com > wrote: On Thu, Nov 27, 2008 at 9:49 AM, Terry Lambert <tlambert(a)apple.com > wrote: On Nov 26, 2008, at 7:31 PM, Rakesh Singhal wrote: I tried to use sem_init() but I think it is not there to use. It is declared in semaphore.h but when I do man sem_init() then it gives the message "No manual entry for sem_init". Now, I am using sem_open(). I think it is right API to create unique semaphore between multi-processes. But creating it in one process if I try to create in another process, the value of semaphore is not same. I am using same name in both process(1st argument of sem_open()). Please suggest to create semaphore (cross-processes). Use either POSIX named semaphores, or use System V semaphores: This email sent to site_archiver(a)lists.apple.com

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