May 2006 - Darwin-dev - lists.apple.com

intercepting system calls works on tiger(10.4.5) but not on panther(10.3.9)
by Puthali H.B 17 May '06

17 May '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com sorry, missed filling in the subject, in my previous mail. >>> "Puthali H.B" <bputtali(a)novell.com> 5/16/2006 10:58 am >>> hi, Don't know if this is the right list to post this query, but saw some threads already on overriding system calls, so thought will try my luck here. :) Actually I've a dynamic library which over-rides system calls, namely connect,recv,send,sendto,accept... and when I preload this on Tiger, using DYLD_INSERT_LIBRARIES AND DYLD_FORCE_FLAT_NAMESPACE, everything works fine. But when I do the same on panther, it crashes. I wrote a sample c test program, just over-riding connect call and compiled it as test_connect.dylib on panther, with gcc 3.3. When I pre-loaded this library in terminal and ran FTP got the following error- dyld: FTP multiple definitions of symbol _connect test_connect.dylib(ccyRQhrn.o) definition of _connect /usr/lib/libSystem.B.dylib(connect.So) definition of _connect Trace/BPT trap But the same dylib works perfectly on tiger. So I wanted to know, if I've missed out on any steps that needed to be done in addition on panther? i.e. is over-riding system calls possible on panther? If so any pointers in that direction will be appreciated very much. plus, am interested in knowing what are da major differences between panther and tiger regarding dynamic handling? can someone give me good links regarding this? :) thanking in advance, Puthali _______________________________________________ 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/bputtali%40novell.com This email sent to bputtali(a)novell.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: StartupItems
by André-John Mas 17 May '06

17 May '06

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com On 16-May-06, at 11:52 , Dave Zarzycki wrote: http://www-user.rhrk.uni-kl.de/~nissler/tuntap/ Andre On May 15, 2006, at 6:57 PM, André-John Mas wrote: Andre On 15-May-06, at 15:59 , Jordan K. Hubbard wrote: On May 15, 2006, at 12:00 PM, Finlay Dobbie wrote: - Jordan _______________________________________________ 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… What if we added tap(4) support to launchd? Would that satisfy most of your needs? If you want something running all the time, just set OnDemand to false in your launchd configuration file. davez Not sure, though I should mention that Miredo uses the following package: As far as I can tell there is no tun driver in Darwin (it would be a nice addition) I've never used launchd, so I will have to see what modifications I need to do. Miredo is an implementation of Teredo, providing a 6to4 tunnel with NAT support. This application use tun/tap to provide the host computer access to IPv6 networks. For this reason it can't really just start running when a connection is made to some specific IP address, since it won't be listening to any specific port. I am open to suitable approaches for allowing this to start running when the system starts. I haven't really played much with launchd and I was following what I knew worked. How would I present this to launchd? That's much more efficient than starting a service and vending a name hoping someone wants to use it, or wants to wait for it. Depends. In a server environment, I'd want the service available and ready to take client connections immediately - without any startup overhead - especially if it needs to perform lengthy initialisation. You can't generalize like that, however. You might want SOME services to start immediately (in which case, the RunAtLoad launchd plist item is probably your friend) but ALL services? No way. That's just wasteful, and unless you make a habit of putting 4GB (for now!) of memory in every machine you own, probably going to have a noticeable performance impact as other things fight for the memory that's being taken up by all those services just lying around doing their nails and watching daytime TV. Sorry, but the "server environment" classification hardly guarantees that each and every service being provided by the server needs to be running all the time, particularly in SOHO configurations where one box serves potentially dozens of needs "in theory" but, in practice, finds many of those needs to be occasional usage scenarios at best. _______________________________________________ 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/ajmas% 40sympatico.ca This email sent to ajmas(a)sympatico.ca _______________________________________________ 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 This email sent to site_archiver(a)lists.apple.com

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Re: StartupItems
by Dave Zarzycki 16 May '06

16 May '06

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com davez On May 15, 2006, at 6:57 PM, André-John Mas wrote: Andre On 15-May-06, at 15:59 , Jordan K. Hubbard wrote: On May 15, 2006, at 12:00 PM, Finlay Dobbie wrote: Depends. In a server environment, I'd want the service available and ready to take client connections immediately - without any startup overhead - especially if it needs to perform lengthy initialisation. - Jordan _______________________________________________ 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… What if we added tap(4) support to launchd? Would that satisfy most of your needs? If you want something running all the time, just set OnDemand to false in your launchd configuration file. Miredo is an implementation of Teredo, providing a 6to4 tunnel with NAT support. This application use tun/tap to provide the host computer access to IPv6 networks. For this reason it can't really just start running when a connection is made to some specific IP address, since it won't be listening to any specific port. I am open to suitable approaches for allowing this to start running when the system starts. I haven't really played much with launchd and I was following what I knew worked. How would I present this to launchd? That's much more efficient than starting a service and vending a name hoping someone wants to use it, or wants to wait for it. You can't generalize like that, however. You might want SOME services to start immediately (in which case, the RunAtLoad launchd plist item is probably your friend) but ALL services? No way. That's just wasteful, and unless you make a habit of putting 4GB (for now!) of memory in every machine you own, probably going to have a noticeable performance impact as other things fight for the memory that's being taken up by all those services just lying around doing their nails and watching daytime TV. Sorry, but the "server environment" classification hardly guarantees that each and every service being provided by the server needs to be running all the time, particularly in SOHO configurations where one box serves potentially dozens of needs "in theory" but, in practice, finds many of those needs to be occasional usage scenarios at best. _______________________________________________ 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/ajmas% 40sympatico.ca This email sent to ajmas(a)sympatico.ca This email sent to zarzycki(a)apple.com This email sent to site_archiver(a)lists.apple.com

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Experiencing build issues with some libraries
by Dale Walsh 16 May '06

16 May '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Mta-interface: amavisd-new-2.3.3 (2005-08-22) + Maia Mailguard 1.1.0 at daleenterprise.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Is there a way to fix this? - -- Dale -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (Darwin) iD8DBQFEacyOiD9DTPch4RQRAr/GAKC81Bbhkl7gFrxYjBfhG9IwujIo6wCgoL4k t1ZKgy9XE3vV9n007bV/PHU= =sCNk -----END PGP SIGNATURE----- _______________________________________________ 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'm trying to build a project that is dependent on some librarires in /usr/X11R6/lib. When ever a library in this directory is linked during the build phase it fails. Here is the output. dylib: Library not loaded: /usr/X11R6/lib/libreetype.6.dylib Reference from: /private/var/tmp/graphics/graphics-1.obj/src/ caretaker Reason: no suitable image found. Did find: /usr/X11R6/lib/libfreetype.6.dylib: can't map I also get the same for /usr/X11R6/lib/libexpat.0.dylib and other libraries which are required by the project. This email sent to site_archiver(a)lists.apple.com

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Re: StartupItems
by Finlay Dobbie 16 May '06

16 May '06

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=eNgxVwtQ8HdJcbgtFQDXFpsPRNBw9ddsPhdSQkkh09gl7MQ3ZOpubnFkGCI7T7fUcNq0XAYQeonErPeooh3gdMEJQz9YmRgQHau5EDipaXl9BzhwJxALfif9seN5Bl6FkMfkj2xfsq+eGfTLI7c0rqxq19CWhCDcD+4kfd6RJGo= Couldn't you put your server:8080 into the Sockets dict for TomCat and have MySQL RunAtLoad [definitely not having launchd wait for /var/ mysql/mysql.sock to be accessed....]? Or is one of the application/ TomCat/Java too slow to start up for that? The app does various lengthy tasks at startup (integrity checking, etc). -- Finlay _______________________________________________ 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 16/05/06, Graham J Lee <leeg(a)teaching.physics.ox.ac.uk> wrote: This email sent to site_archiver(a)lists.apple.com

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Re: StartupItems
by Graham J Lee 16 May '06

16 May '06

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com On 16 May 2006, at 09:50, Finlay Dobbie wrote: I'm not dissing launchd, I'm just saying that I have encountered particular situations where it didn't really seem to be the best option. In particular, there was a situation where I had to start Tomcat and a java application which needed MySQL to be running beforehand. Cheers, Graham. -- Graham J Lee "Oxford University's UNIX Expert" As seen in MacWorld UK http://iamleeg.blogspot.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 On 15/05/06, Jordan K. Hubbard <jkh(a)apple.com> wrote: Sorry, but the "server environment" classification hardly guarantees that each and every service being provided by the server needs to be running all the time, particularly in SOHO configurations where one box serves potentially dozens of needs "in theory" but, in practice, finds many of those needs to be occasional usage scenarios at best. Couldn't you put your server:8080 into the Sockets dict for TomCat and have MySQL RunAtLoad [definitely not having launchd wait for /var/ mysql/mysql.sock to be accessed....]? Or is one of the application/ TomCat/Java too slow to start up for that? smime.p7s

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Re: StartupItems
by Finlay Dobbie 16 May '06

16 May '06

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=dE/uEeFrY16/Ig3cv6bROExU7ONx6+XRXqJL+yzf7NxN+M5eKw8d1ShwLMWkkjhqRZOsme2HCcDuXHeTGmAnTp5BpXNgzBhAT1oSbSpqbWCoYkygyajstSp8jOJKsFGyfVxoZDBp+qK1QzvEAMCbRoN0cwe4H6EDgGYfcUwe788= I didn't want to. You might want SOME services to start immediately (in which case, the RunAtLoad launchd plist item is probably your friend) but ALL services? No way. Obviously. Sorry, but the "server environment" classification hardly guarantees that each and every service being provided by the server needs to be running all the time, particularly in SOHO configurations where one box serves potentially dozens of needs "in theory" but, in practice, finds many of those needs to be occasional usage scenarios at best. I'm not dissing launchd, I'm just saying that I have encountered particular situations where it didn't really seem to be the best option. In particular, there was a situation where I had to start Tomcat and a java application which needed MySQL to be running beforehand. Now, you could argue that the inadequacies are in MySQL and this Java application, but I don't necessarily think that's fair. -- Finlay _______________________________________________ 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 15/05/06, Jordan K. Hubbard <jkh(a)apple.com> wrote: You can't generalize like that, however. This email sent to site_archiver(a)lists.apple.com

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hi,
by Puthali H.B 16 May '06

16 May '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com hi, Don't know if this is the right list to post this query, but saw some threads already on overriding system calls, so thought will try my luck here. :) Actually I've a dynamic library which over-rides system calls, namely connect,recv,send,sendto,accept... and when I preload this on Tiger, using DYLD_INSERT_LIBRARIES AND DYLD_FORCE_FLAT_NAMESPACE, everything works fine. But when I do the same on panther, it crashes. I wrote a sample c test program, just over-riding connect call and compiled it as test_connect.dylib on panther, with gcc 3.3. When I pre-loaded this library in terminal and ran FTP got the following error- dyld: FTP multiple definitions of symbol _connect test_connect.dylib(ccyRQhrn.o) definition of _connect /usr/lib/libSystem.B.dylib(connect.So) definition of _connect Trace/BPT trap But the same dylib works perfectly on tiger. So I wanted to know, if I've missed out on any steps that needed to be done in addition on panther? i.e. is over-riding system calls possible on panther? If so any pointers in that direction will be appreciated very much. plus, am interested in knowing what are da major differences between panther and tiger regarding dynamic handling? can someone give me good links regarding this? :) thanking in advance, Puthali _______________________________________________ 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: StartupItems
by André-John Mas 16 May '06

16 May '06

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com Andre On 15-May-06, at 15:59 , Jordan K. Hubbard wrote: On May 15, 2006, at 12:00 PM, Finlay Dobbie wrote: Depends. In a server environment, I'd want the service available and ready to take client connections immediately - without any startup overhead - especially if it needs to perform lengthy initialisation. - Jordan _______________________________________________ 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/ajmas%40sympatico.ca _______________________________________________ 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… Miredo is an implementation of Teredo, providing a 6to4 tunnel with NAT support. This application use tun/tap to provide the host computer access to IPv6 networks. For this reason it can't really just start running when a connection is made to some specific IP address, since it won't be listening to any specific port. I am open to suitable approaches for allowing this to start running when the system starts. I haven't really played much with launchd and I was following what I knew worked. How would I present this to launchd? That's much more efficient than starting a service and vending a name hoping someone wants to use it, or wants to wait for it. You can't generalize like that, however. You might want SOME services to start immediately (in which case, the RunAtLoad launchd plist item is probably your friend) but ALL services? No way. That's just wasteful, and unless you make a habit of putting 4GB (for now!) of memory in every machine you own, probably going to have a noticeable performance impact as other things fight for the memory that's being taken up by all those services just lying around doing their nails and watching daytime TV. Sorry, but the "server environment" classification hardly guarantees that each and every service being provided by the server needs to be running all the time, particularly in SOHO configurations where one box serves potentially dozens of needs "in theory" but, in practice, finds many of those needs to be occasional usage scenarios at best. This email sent to ajmas(a)sympatico.ca This email sent to site_archiver(a)lists.apple.com

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Re: Need help building AVR toolchain
by Rick Mann 15 May '06

15 May '06

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On May 14, 2006, at 20:08 , Rick Mann wrote: -- Rick _______________________________________________ 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… So I downloaded gettext-0.14.5, built it with the standard config, make, make install dance, and tried again. I get: $ g++ -g -O2 -L/usr/local/avr/i686-apple-darwin8.6.1/avr/lib - lbfd -L/usr/local/avr/lib -o avarice crc16.o devdescr.o ioreg.o jtag2bp.o jtag2io.o jtag2misc.o jtag2prog.o jtag2run.o jtag2rw.o jtag2usb.o jtagbp.o jtaggeneric.o jtagio.o jtagmisc.o jtagprog.o jtagrun.o jtagrw.o main.o remote.o utils.o gnu_getopt.o gnu_getopt1.o -lusb -lbfd -liberty -liconv -lintl /usr/bin/ld: warning multiple definitions of symbol _locale_charset /usr/local/lib/libintl.dylib(localcharset.o) definition of _locale_charset /usr/lib/gcc/i686-apple-darwin8/4.0.1/../../../libiconv.dylib (localcharset.o) definition of _locale_charset /usr/bin/ld: warning suggest use of -bind_at_load, as lazy binding may result in errors or different symbols being used symbol _locale_charset used from dynamic library /usr/local/lib/ libintl.dylib(localcharset.o) not from earlier dynamic library / usr/lib/libiconv.2.dylib(localcharset.o) Sorry for being so incapable, but I appreciate the help... Hmm. I guess I didn't pay enough attention to realize that it seems to have actually built! This email sent to site_archiver(a)lists.apple.com

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