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

Re: lanuchd questions
by Jason Coco 20 Oct '08

20 Oct '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:cc:message-id:from:to :in-reply-to:content-type:mime-version:subject:date:references :x-mailer; bh=l5H4sLYPp1vIG8A2gXYwUMB2/clu8NcegXg5CUBTEZA=; b=vm55giF362u2M3zpsZRyQHC1c4RdXTHMfHCJ5T417Kzur4rmuvPCzNSgFngiDJYQTm SAELIfn72dj6MxzRj4SeQxOS1CXQeeWGK+aAsxTYBgNZggGg/xhhEKLUGxp0EHpOQwyA thzT7+MMCC1AJyypH/Mq4Nhf7XD6t/oTFBFRs= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=cc:message-id:from:to:in-reply-to:content-type:mime-version:subject :date:references:x-mailer; b=tl1hMV0krVOyi8c2HyXTQ+U5eGPi+jAH3goo6KGFMxN15wWp80QHbCixIx9ltSI3Hj yZFOFoWJuSQ3DHinMLGgQ5+RSpkxlPU2EtI0fCD5cTAZLLXKEFHDZ7UXRyij46rxVA4X NLRkuqJeKiKPhSipZmfVPbmfTetTdZFYrs+kc= On Oct 20, 2008, at 16:34 , Karan, Cem (Civ, ARL/CISD) wrote: _______________________________________________ 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 Truthfully, I'd rather petition Apple to make it a part of launchd. The moment we have dependencies, then we have to worry about cycles (deadlock), deciding what to do if a process that we're dependent on goes down, etc. And, now that I'm thinking about it, there is another cheesy method to handle the problem. Write a script that launchd launches that runs your first program. When that program returns, the script submits the other programs to launchd via 'launchctl submit'. Since we haven't put anything into /Library/LaunchDaemons or the other launchd places, we get the same effect as using /var/run, so everything is always launched in the correct order each time we reboot. That's kinda what I did... I ended up writing a daemon which was connected to launchd, starts up and does all the initialization stuff. It then actually manages some of the other processes and they all communicate over a unix socket. smime.p7s

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RE: lanuchd questions
by Karan, Cem (Civ, ARL/CISD) 20 Oct '08

20 Oct '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Thread-index: Acky6e67AAcnLIcWR4CLpEBzVDNlmQABASSw Thread-topic: lanuchd questions Truthfully, I'd rather petition Apple to make it a part of launchd. The moment we have dependencies, then we have to worry about cycles (deadlock), deciding what to do if a process that we're dependent on goes down, etc. And, now that I'm thinking about it, there is another cheesy method to handle the problem. Write a script that launchd launches that runs your first program. When that program returns, the script submits the other programs to launchd via 'launchctl submit'. Since we haven't put anything into /Library/LaunchDaemons or the other launchd places, we get the same effect as using /var/run, so everything is always launched in the correct order each time we reboot. Thanks, Cem Karan > -----Original Message----- > From: Jordan K. Hubbard [mailto:jkh@apple.com] > Sent: Monday, October 20, 2008 3:27 PM > To: Dave Zarzycki > Cc: Karan, Cem (Civ, ARL/CISD); Darwin Dev; Damien Sorresso > Subject: Re: lanuchd questions > > > On Oct 20, 2008, at 7:04 AM, Dave Zarzycki wrote: > > > A cheesy way to accomplish this goal would be leverage > the launchd conditional keep alive logic and the fact that > /var/run is guaranteed to be cleaned at boot. This would > involve breaking each daemon out into a separate launchd job > that is conditionally kept alive whenever > /var/run/my-script-is-done exists. The script on the other > hand, is also a launchd job, and is kept alive as long as > /var/run/my-script-is-done does NOT exist. This script MUST > "touch" /var/run/my-script-is-done to signal launchd to stop > relaunching the script and begin relaunching the daemons. > > > > You're right, that's pretty cheesy. :-) > > Seems like we keep coming up against this "but I want these > jobs to be sequential!" requirement again and again. "In the > large" I also agree that sequential job launch is very > fragile ("on demand" being so much more forgiving of > unanticipated events and configuration changes) but I think > there is still a legit need for small groups of things (4-5 > items, max) to be able to depend on one another. Sounds like > a job for the legendary "launchd helper"! :-) > > - Jordan > > P.S. If we don't want to write that helper, perhaps we should > communicate our thoughts on it to a wider audience and see if > someone else does! > _______________________________________________ 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: lanuchd questions
by Jason Coco 20 Oct '08

20 Oct '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:cc:message-id:from:to :in-reply-to:content-type:mime-version:subject:date:references :x-mailer; bh=geS8wYEajVKYdPA0r073ZXtM/7KbHmf0RDXbPYESUUM=; b=BnJzcLhgnQgNqMmTpFNhAbJsdYWwTwBhEmGC6QdbqEVcA5rh0Fi9nBjnfxpQpfK8l3 FACR2BwK5JM9n7J/paz9Xrdb0/xtej0evUPlSEUU8B6O5TzK2lcYtKfYQEB2jKGtyipw wsb6tLot42upYvOseYtjq5VKuhSJqfPPenMpk= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=cc:message-id:from:to:in-reply-to:content-type:mime-version:subject :date:references:x-mailer; b=Cht2Zg0//7ZgJxdODyB/Oqp6ooCaeaNYPFYuu1/TCIVl5BOKPCxfYigr7GdQb6oiYx l32+PnDZGfKndGCC4sL+DLrCVjRsPViwUBVZiNYV9AT7Qj+NGHwuzkfWw+f1MuR7e0PV Ru/8SKE/DMiTYheuik3AoZNAboMlCfD3tzxpg= _______________________________________________ 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 smime.p7s

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Re: lanuchd questions
by Jordan K. Hubbard 20 Oct '08

20 Oct '08

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: lanuchd questions
by Karan, Cem (Civ, ARL/CISD) 20 Oct '08

20 Oct '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Thread-index: AckyvN9x/TyK7zLHRmWVuAJ00vOQuwACHFgg Thread-topic: lanuchd questions Actually, I like that method quite a bit; I can make the first program run once at launch, and have it store the configuration files it generates in /var/run. The other scripts can use the PathState key to watch for the files in /var/run that the first one is generating, which means that they won't launch until the first program is done. And that solves all my problems in one go. Thanks! Thanks, Cem Karan > -----Original Message----- > From: Dave Zarzycki [mailto:zarzycki@apple.com] > Sent: Monday, October 20, 2008 10:05 AM > To: Karan, Cem (Civ, ARL/CISD) > Cc: darwin-dev(a)lists.apple.com > Subject: Re: lanuchd questions > > Karen, > > A cheesy way to accomplish this goal would be leverage the > launchd conditional keep alive logic and the fact that > /var/run is guaranteed to be cleaned at boot. This would > involve breaking each daemon out into a separate launchd job > that is conditionally kept alive whenever / > var/run/my-script-is-done exists. The script on the other > hand, is also a launchd job, and is kept alive as long as > /var/run/my-script-is- done does NOT exist. This script MUST > "touch" /var/run/my-script-is- done to signal launchd to stop > relaunching the script and begin relaunching the daemons. > > For the daemons: > > <key>KeepAlive</key> > <dict> > <key>PathState</key> > <dict> > <key>/var/run/my-script-is-done</key> > <true/> > </dict> > </dict> > > For the script: > > <key>KeepAlive</key> > <dict> > <key>PathState</key> > <dict> > <key>/var/run/my-script-is-done</key> > <false/> > </dict> > </dict> > > > > > davez > > > > On Oct 20, 2008, at 4:53 AM, Karan, Cem (Civ, ARL/CISD) wrote: > > > I hope this is the right list for these questions, if not, > please tell > > me where I should go. > > > > I'm working on integrating a set of Linux programs into our > product on > > the mac, and, as in any porting job, I'm having certain problems > > getting everything to work just right. In this case, the Linux > > application is actually a set of programs, each of which does a > > different job, in a particular order. The first program > must be run > > exactly once, before the other programs are run. It > creates a set of > > files that the other programs parse and use while they are > running. > > These other programs are effectively daemons (which have a -nofork > > option, so they will work with launchd), and need to be > kept alive. > > This means that I can't just write one script that launches them in > > order, because then the parameters I pass to launchd will > either keep > > the whole script alive, or run it just once. So, what is > the best way > > of forcing the scripts to run in the particular order I > want them to > > run in? > > > > Thanks, > > Cem Karan > > > > _______________________________________________ > > 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/zarzycki%40apple.com > > > > This email sent to zarzycki(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: lanuchd questions
by Dave Zarzycki 20 Oct '08

20 Oct '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Karen, For the daemons: <key>KeepAlive</key> <dict> <key>PathState</key> <dict> <key>/var/run/my-script-is-done</key> <true/> </dict> </dict> For the script: <key>KeepAlive</key> <dict> <key>PathState</key> <dict> <key>/var/run/my-script-is-done</key> <false/> </dict> </dict> davez On Oct 20, 2008, at 4:53 AM, Karan, Cem (Civ, ARL/CISD) wrote: Thanks, Cem Karan _______________________________________________ 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/zarzycki%40apple.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… A cheesy way to accomplish this goal would be leverage the launchd conditional keep alive logic and the fact that /var/run is guaranteed to be cleaned at boot. This would involve breaking each daemon out into a separate launchd job that is conditionally kept alive whenever / var/run/my-script-is-done exists. The script on the other hand, is also a launchd job, and is kept alive as long as /var/run/my-script-is- done does NOT exist. This script MUST "touch" /var/run/my-script-is- done to signal launchd to stop relaunching the script and begin relaunching the daemons. I hope this is the right list for these questions, if not, please tell me where I should go. I'm working on integrating a set of Linux programs into our product on the mac, and, as in any porting job, I'm having certain problems getting everything to work just right. In this case, the Linux application is actually a set of programs, each of which does a different job, in a particular order. The first program must be run exactly once, before the other programs are run. It creates a set of files that the other programs parse and use while they are running. These other programs are effectively daemons (which have a -nofork option, so they will work with launchd), and need to be kept alive. This means that I can't just write one script that launches them in order, because then the parameters I pass to launchd will either keep the whole script alive, or run it just once. So, what is the best way of forcing the scripts to run in the particular order I want them to run in? This email sent to zarzycki(a)apple.com This email sent to site_archiver(a)lists.apple.com

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lanuchd questions
by Karan, Cem (Civ, ARL/CISD) 20 Oct '08

20 Oct '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Thread-index: Ackyqmh5k76YEUeHRsGg3ptn+upbFQ== Thread-topic: lanuchd questions _______________________________________________ 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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Solved?: Re: ipfw2 and fwd in Darwin
by Giuliano Gavazzi 16 Oct '08

16 Oct '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Now time to debug the panic in ipfw_chk for unknown opcode. Thanks Giuliano _______________________________________________ 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… After a day of poking into the FreeBSD sources and printf-ing here and there, I might have found the solution. Well, at least now ipfw fwd works and the system does not seem to suffer... The file to change is bsd/netinet/ip_output.c diff -u ip_output.c ip_output.c.xnu-1228.7.58 --- ip_output.c 2008-10-16 12:42:21.000000000 +0200 +++ ip_output.c.xnu-1228.7.58 2008-10-16 12:48:24.000000000 +0200 @@ -1121,7 +1121,7 @@ dst->sin_addr.s_addr) break; } - if (ia_fw) { //the arg was ia, presumably wrong as it would brake fwd + if (ia) { /* tell ip_input "dont filter" */ struct m_tag *fwd_tag; struct ip_fwd_tag *ipfwd_tag; this makes the source more consistent with the original FreeBSD one. Might have been originated by the changed name of the ia variable in the Darwin source, change that was not brought forward in the next block of code. Reported to Apple but someone in the list might know if this has any ill side-effects. This email sent to site_archiver(a)lists.apple.com

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Re: My first? question
by Eli Bach 16 Oct '08

16 Oct '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=w+zVYIrpVZY4NmR7ndT2AZwuYQZnBwlaQpJT2IrjX9I=; b=xZVCPJ/jBsEnkJvlLGxpbOhTQZDWz9ZcxvBij7M/pYp+rlm9mCajJS5EnB7WeWnyeN FFYYeTJ5Em9gFsBivS5hipT8quyU86Cs9ESWtljPnP98Q7LO8jFwEfQwj0IeA+mRUWnS dtCJR6c0ugwbyHQNsILn6tWnOG4ke/faLzrRc= 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=F9ljzZ4kvEoMyDlx/mLnWwWNLkpHAvrC5xCIt20BU+irEawlrcGmQxhe4EJocjvCdl AIDc4/ctPlP/NJllLO4mU7cFe/AdYOuTr2IdnFUk8c24sM2EsasHjRLhim803z/cMtc5 U0HpswYPInbQt5eWyhXIcujYYQlsNvFR+a1Mw= On Oct 15, 2008, at 5:54 PM, Juan Falgueras wrote: Hi all there I am having several problems with gnu gcc: $ c++-4.2 warningsfloatint.cpp warningsfloatint.cpp: In function ‘int main()’: warningsfloatint.cpp:8: warning: converting to ‘int’ from ‘float’ without the need of nor a file of options like in $ c++-4.2 @/Users/juanfc/c++opts warningsfloatint.cpp _______________________________________________ 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 am absolutely new to this list. My name is Juan and I am teaching at the University of Málaga (mediterranean, south of Spain), now happily with 24 iMacs under LDAP and ARD, the experience, after so many years of Linux and also (no way, Windows) is being so genial that I am a bit angry not having had it before. But we live with many others professors that use Linux as base and we decided time ago to use the greater common divisor: only use Terminal+Simple-Text-Editor. My choice for the last has been TextWrangler: very very good (is not TextMate, but it's quality/ price is infinite). For C++ coding, using TextWrangler is fine, if you don't want to use XCode (which is also free, and included with the developer tools). And there are a number of cli text editing tools included, like vi, ed, emacs, etc... Why, by default is activated the 4.01 instead the 4.2 (not to speak the last current one : 4.3.2, that its not yet there) Is there some specific bug fix or feature in 4.2 (or 4.3.2) that you need? Or is it just that it has a higher version number? Apple makes their own modifications to gcc (their own bug fixes, optimizations and better support for Objective-C), and then does a lot of QA on making sure the compiler works right. They are always going to be several revisions behind, just because the compilers have to work right. Previous versions of Xcode included a 'gcc_select' command, to change the default compiler, but it no longer seems to be included. However, past fairly trivial uses of gcc (like compiling a single file into an executable), you generally use a script or makefile that you have explicitly use whichever version of gcc you want by specifying the full path to gcc in a variable. Is it possible to launch the editor with any script or something directly moving you to at least the first compiler error? Building in XCode makes this happen. TextWrangler has some support for executing unix commands, and you may be able to write scripts to parse the output in TextWrangler. Why is so complicate activate _all_ the compiler Warning-on options and are near all of then deactivated? I would like to see the warnings in the student Terminal window. It will help them a lot. alias c+++="c++ -pedantic -pedantic-errors -Wextra -Wall - Waggregate-return -Wcast-align -Wcast-qual -Wchar-subscripts - Wcomment -Wconversion -Wfatal-errors -Wfloat-equal -Wformat -Wno- format-extra-args -Wformat-nonliteral -Wformat-security -Wformat- y2k -Wimplicit -Wimport -Winit-self -Winline -Wlong-long - Wmissing-braces -Wmissing-field-initializers -Wmissing-format- attribute -Wmissing-include-dirs -Wmissing-noreturn -Wmost -Wno- multichar -Wpadded -Wparentheses -Wpointer-arith -Wredundant-decls -Wreturn-type -Wsequence-point -Wshadow -Wsign-compare -Wswitch -Wswitch-default -Wswitch-enum -Wundef -Wunknown-pragmas - Wunreachable-code -Wunused -Wunused-function -Wunused-label - Wunused-parameter -Wunused-value -Wunused-variable -Wwrite-strings " Why not a real -WALL? How to approach to that? I don't think Apple modifies gcc a lot in this area. And, for non-trivial uses, you can make it so all this is just done in a single place, either with an alias or a script variable, so it doesn't have to be everywhere. You could just create an alias file or basic scripts for your students that set this up, so they don't have to worry about all this. This email sent to site_archiver(a)lists.apple.com

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My first? question
by Juan Falgueras 16 Oct '08

16 Oct '08

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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