June 2010 - Darwin-dev - lists.apple.com

Re: Open Source Release: Mac OS X 10.6.4
by Ariel Feinerman 30 Jun '10

30 Jun '10

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Re: Daemon Communication
by Paolo Ambrosio 30 Jun '10

30 Jun '10

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:mime-version:received:in-reply-to :references:from:date:message-id:subject:to:content-type; bh=3TxltyZpIeyPeXKV7ZjCfFSp9iMPZQ4s3Q9CNKlb4So=; b=AaxrY9+VFfhK5Brb1BgKqceEuo/k8QJPq6lF4Pn5RrJEH+ns9Ivh/X0y6xPDni/6l3 jmjxzaWlZk7PP7xe8idFrK8nf+XkxEs4tHIxoC/uKVCeVh6bDXfa1XvQCfkXWRHMwqik iUJ0TDP/YKE3KuNcYXnh2tPwL4Yp+sn0jes3E= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :content-type; b=uugcVzgM6Z4+SVYKFIBwJUsNIuNe+aHGAB3xcZfLxuDL5F6GmNdRUkl+t7it+Byddb kwldTyu70d1TYsSH3Cna66+LzrQrsTMqNyJ5U0s0CQoV/QjLnjdMAPD/Ua2fTjj9r+iP 58pv1HCsxTkeqUv3tK4sjAGOY+Thzxqh0wRaM= I just want to thank everyone that replied to my question and to express my appreciation for the excellent Launch-on-Demand feature (and the rest of launchd). -- Paolo _______________________________________________ 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: Having trouble with Object's +alloc class method in 10.6.4
by dan hitt 29 Jun '10

29 Jun '10

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:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=L/GyWej/61EhxfKvVeis8fTBOMTlq32EwPRa8LGk668=; b=e+mkCneR9ajm85g2HsdCCtcE/TTTGhpMlHgCKMXVQ0g9c6LFv2u3WohncVz69V/Hkm Rho2tBWu+aLJvk/JJLEAy5SqEWwI3wDGKvTrJP+pg5bgUgYW1zJET+IebG3QlgIXp5rY ws5LsxBBQL2SRl6jDzkSh+x0AeBjKfd6A1nDc= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=UTybF3gG65FiPoo7QQl332KuaXyRqmcZ5FOW9c27UAL2e/R8L6JoYGByElNHROUqQU eI3RFCXqjt6e8NNBQY1ZXlNxTQchyAuWeLePWfvwYtzCkpmQh/bLn3Hq2DNg6X1VMLQi R6Herc/fbrtQWqynyeC20ZrXLt6HlUw6QLxvo= Fritz, thanks! I'll follow up on objc-language(a)lists.apple.com. dan On Mon, Jun 28, 2010 at 9:04 PM, Fritz Anderson <fritza(a)manoverboard.org> wrote: > On 28 Jun 2010, at 10:16 PM, dan hitt wrote: > >> This is an objective-C question, so if it is not exactly >> the right subject matter for darwin-dev, please direct me >> to the right list. > > Objective-C List <objc-language(a)lists.apple.com>? > > My guess is that you will not get much satisfaction out of current Apple tools and runtimes, as Objective-C 2.0 is completely a Cocoa technology, and 10.6 Cocoa depends on Objective-C 2.0. > > — F > > _______________________________________________ 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: Having trouble with Object's +alloc class method in 10.6.4
by Fritz Anderson 29 Jun '10

29 Jun '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On 28 Jun 2010, at 10:16 PM, dan hitt wrote: > This is an objective-C question, so if it is not exactly > the right subject matter for darwin-dev, please direct me > to the right list. Objective-C List <objc-language(a)lists.apple.com>? My guess is that you will not get much satisfaction out of current Apple tools and runtimes, as Objective-C 2.0 is completely a Cocoa technology, and 10.6 Cocoa depends on Objective-C 2.0. — F _______________________________________________ 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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Having trouble with Object's +alloc class method in 10.6.4
by dan hitt 29 Jun '10

29 Jun '10

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:mime-version:received:received:date:message-id :subject:from:to:content-type; bh=YP17wUY8N5lQoZsWCo21zxaQfe6B2Zk2B46cSN3zQ20=; b=hJQMVle4JE2RG+l1q3iNYoy1j2fPR5EpFwVz1RuFeZbUgKqScVwHRWxSSvKihT/hvO Yi0rlbSCYN594hJfXBTtfnMfbJP53dYyPkGzK7/YE3zlqk3+NjrFj0CCmUvOoKZ9UwhU NvsMIuxT7a8Ho51m1EdFUbBoz576xjz/jicBk= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=shptKvYtjAIZY6ACPC17ncIIc+w9pl7e/aR2FopROLYdvpvDhqHHDp5cPz89LfWMeY HsuYqCYvPU81onbvYuMpQu1i0wzhHDDiI+3cuR2RBNbYGVVy8ymo3bSAGNFrbMQfGWrv 4jQmthZ55t4118MQ+oKJtFLcZmDlgE7gxN/Dc= Hi All, This is an objective-C question, so if it is not exactly the right subject matter for darwin-dev, please direct me to the right list. I have some code that used to compile and work on 10.5.8, but since i upgraded yesterday to 10.6.4 it is having problems. I have classes that inherit from Object. (They do not inherit from NSObject because i want them to be portable to other systems, and also, i have a lot of similar code that i may attempt to ressurect.) Object very clearly declares +alloc in /usr/include/objc/Object.h, on line 67, in fact. My class, which compiled without error or warning a few days ago in 10.5.8, inherits from Object (not NSObject). Now when i try to compile it, i get warnings '....' may not respond to '+alloc' (where the ellipsis is where my class name goes). Other warnings, even more alarming, that i get are: 'Object' may not respond to '-init' My compile command is gcc -c -O0 -Wall -std=c99 ClassName.m (where ClassName.m is the name of my class). I can create a small complete test case if it would be helpful. Thanks in advance for any info. dan _______________________________________________ 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: is libcrypto.dylib daemon-safe?
by Chris Ridd 28 Jun '10

28 Jun '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On 28 Jun 2010, at 08:31, Rustam Muginov wrote: > Hello all. > Is libcrypto.dylib safe to use in daemons? > The technote 2083 only lists frameworks, not libraties: > http://developer.apple.com/mac/library/technotes/tn2005/tn2083.html#SECFRAM… > so i can not find libcrypto where. That's part of OpenSSL, which is certainly used by many Internet servers such as httpd, slapd, etc. Cheers, Chris _______________________________________________ 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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is libcrypto.dylib daemon-safe?
by Rustam Muginov 28 Jun '10

28 Jun '10

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:from:content-type :content-transfer-encoding:subject:date:message-id:to:mime-version :x-mailer; bh=4BqA8TvyqB0DVb+e8i1RX3yUkuVHUKg+x1ZBHWRPFPM=; b=S1QtsGOTEil1xGbJeifZ2ttggCOFXJOlNnShuSfllAnipVJlWty7i1CRhcVGGo/8QI Lml2RvD8mgLThrWGVLh1f0aAhmset8AEk5ghzR+7G3SRC9PymZPRGfUpMm8wBP1NyZdr rEWyG9FOf71Vn3QSHAOscoH9UKul6hHu6+saU= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:content-type:content-transfer-encoding:subject:date:message-id :to:mime-version:x-mailer; b=PqAe7HlPQobcuO3gydz//YpHmmpcf8bXTtvqfhXYgSynedQT7KgOfNw8ENIYhJOy94 IjlmP2m2wnjOnwf8V1zihcU7fvRhPKkpvHUS58ar5CsYAl/duoSgDmypYV+4hsuoYXI/ fkZswPsMNL5eTrL6ybjohFfqiWHUQFmnLEaSA= Hello all. Is libcrypto.dylib safe to use in daemons? The technote 2083 only lists frameworks, not libraties: http://developer.apple.com/mac/library/technotes/tn2005/tn2083.html#SECFRAM… so i can not find libcrypto where. Thank you in advance. -- Sincerelly, Rustam Muginov _______________________________________________ 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: Daemon Communication
by Damien Sorresso 25 Jun '10

25 Jun '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jun 24, 2010, at 5:37 AM, Paolo Ambrosio wrote: > Hello, > > I am in the process of starting the development of a daemon that > should interact with local CLI and GUI clients (for service control > and data query). It should be similar to what Spotlight does, with the > daemon running at system startup, a command line client as "mdfind", a > menubar item, etc. You should watch the Launch-on-Demand WWDC10 session. It (and the rest of the WWDC10 sessions) is available to anyone with a developer account. > In the "Daemons and Agents" Technical Note TN2083 [1], "Apple > recommends that you use UNIX domain sockets for client/daemon > communication". Does Spotlight use this method? No. > Being new to the Darwin/Apple world, I have another question also. In > the Daemon-Safe Frameworks Table i read that Carbon and Cocoa are not > available for use in daemon code, and it makes sense. Does it mean > that I won't be able to vend an object using Distributed Objects > (without an agent wrapping Cocoa messages to the Unix Socket)? The example that came with the Launch-on-Demand session serializes a CFPropertyList and sends it over a Unix domain socket. That's what I'd recommend you do. The reason Carbon and Cocoa aren't considered daemon-safe is because they may attempt to access user-specific resources (like the home directory). While daemons run with root privileges, they do not run "as root". They are fundamentally user-free constructs. -- Damien Sorresso BSD Engineering Apple Inc. _______________________________________________ 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: Daemon Communication
by Bill Janssen 25 Jun '10

25 Jun '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Jens Alfke <jens(a)mooseyard.com> wrote: > Are you sure you really need a daemon and not an agent? Daemons are > harder to write since they don't run as a "real" user or within a > regular login session. Moreover, if you run a daemon as root, you have > to be very careful about security. Depending on the meaning of "real", I guess. It's a real user account, but as you say, not a session that has access to the window server. I've written a couple in the last two years. One, a Web server, runs from a LaunchDaemon plist file; another, which has to call OpenOffice to convert documents, needed to run in a context which has access to the window server because OpenOffice needs to talk to the window server for some reason, so it runs as the logged-in user, from a LaunchAgent plist. > > i read that Carbon and Cocoa are not > > available for use in daemon code, and it makes sense. Does it mean > > that I won't be able to vend an object using Distributed Objects > > (without an agent wrapping Cocoa messages to the Unix Socket)? I'm guessing that Cocoa "Distributed Objects" might work for communication with a launchd daemon, so long as that daemon was written in Objective-C. It's part of the Foundation framework, and TN 2083 says, "The basic rule is that everything in CoreServices and below (including System, IOKit, System Configuration, Foundation) should work in any bootstrap namespace (these are daemon-safe frameworks)" Bill _______________________________________________ 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: Basic C query.
by Terry Lambert 24 Jun '10

24 Jun '10

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com -R (2) The reason for using the '8' was: (a) to ensure that strange compiler-specific alignment and packing rules didn't come into play with a static structure alignment and padding by using a "natural" boundary (look up "#pragma pack"). (b) because a non-0 value is in technical compliance with the c99 standard, so the compiler guys can't argue it's illegal. It is someone sticking their tongue out at compiler folks who strictly enforce standards at the cost of making otherwise perfectly good older code fail to run. The same argument happened over the "volatile" keyword. (c) The '8' has nothing to do with the structure size or 32 vs. 64 bits, it's just a coincidence, if you assume 32 bits and 4 byte alignment of internal structure fields when structure packing. -- 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 Jun 24, 2010, at 8:31 AM, Arnab Ganguly wrote: To be more precise.I am curious to know what is the concept of behind calling ((Test *) 8)->a -8 or sometime ((Test *) 16)->a -16.Does it have any dependency with the number members present in the structure or how is it ?Also how things are to be handled in case of OS 64bit. On Thu, Jun 24, 2010 at 6:44 PM, Arnab Ganguly <aganguly01(a)gmail.com> wrote: Hi All, Thanks for all help and inputs.Got the idea of offsetof() .But unfortunately not clear about what is the concept of 8 and then again subtracting for 8.Like when will i do 16 and -16 etc? Please help. -A (1) I sent my original reply to you off list precisely to avoid this kind of noise on the list. It's also impolite to quote private email to a mailing list. Please send any additional follow up questions on this subject to the comp.lang.c Usenet group, or to some other mailing list. The relevance to porting code using the construct to Mac OS X has been answered already, so additional questions no longer get the benefit of the doubt about being Mac OS X related. This email sent to site_archiver(a)lists.apple.com

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