June 2005 - Darwin-dev - lists.apple.com

Re: geteuid() while debugging
by Brian Bergstrand 25 Jun '05

25 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Jun 25, 2005, at 8:45 AM, Chase wrote: > > -rwsr-xr-x root wheel > > when i run the code normally, everything works just fine, whether > launching as root or as a vanilla user. > > but, when i'm trying to step through the code with the xcode/gdb > debugger, geteuid() is returning the uid of my vanilla user (the > one i'm running xcode as). > > what can i do to fix this so that i can properly debug without > having to log in as root to run xcode? > > thanks. > > - chase I don't believe gdb respects setuid (if I'm wrong, someone will pipe in), so you'll have to launch gdb as root from the command line and eschew XCode debugging. $ sudo gdb <PATH TO YOUR APP> Brian Bergstrand <http://www.bergstrand.org/brian/> PGP Key ID: 0xB6C7B6A2 -----BEGIN PGP SIGNATURE----- Version: PGP Desktop 9.0.1 (Build 2185) iQA/AwUBQr2dannR2Fu2x7aiEQKKzgCgiS4hYi/w4XcImLg/1nfE481w5cYAoO/7 2B2Qp1ZYHPwfdcO7fzdQC3Ri =Fjeq -----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… This email sent to site_archiver(a)lists.apple.com

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geteuid() while debugging
by Chase 25 Jun '05

25 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com i have an if statement that looks like: if (geteuid()==0) { // routing table adjustments that only root can make } after each compile, i use chown/chmod to set the binary's privs like so: -rwsr-xr-x root wheel thanks. - chase _______________________________________________ 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… when i run the code normally, everything works just fine, whether launching as root or as a vanilla user. but, when i'm trying to step through the code with the xcode/gdb debugger, geteuid() is returning the uid of my vanilla user (the one i'm running xcode as). what can i do to fix this so that i can properly debug without having to log in as root to run xcode? This email sent to site_archiver(a)lists.apple.com

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Re: .hidden gone in Tiger?
by Finlay Dobbie 24 Jun '05

24 Jun '05

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=WAXlekOcdP57vOKiPhAcc+Phj733Qo4bDvIO8AMOWadhWljAOENFGGH8DIFzlHc4Vt1Gnl7nyVQc4wEyt+CoBVWypg0zErndvWHJPwwUNoZtWIMpugamyIoVDVQHTGmPkhBIFHeZaZsntdLNf098S4UjPTp9hS50Vt2hqrMtzNw= On 6/24/05, Steve Gehrman <sgehrman(a)mac.com> wrote: > > what happened to /.hidden in Tiger? It went away. > how can I know to hide /mach ? Hide? It's always visible from Darwin ;-) In Tiger, though, the installer sets the invisible HFS+ attribute on the files in / which should be invisible. If you have OS X and the DevTools, you can use /Developer/Tools/SetFile, but unfortunately that resolves symlinks and so it won't always work. -- 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… This email sent to site_archiver(a)lists.apple.com

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.hidden gone in Tiger?
by Steve Gehrman 24 Jun '05

24 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com what happened to /.hidden in Tiger? how can I know to hide /mach ? -steve _______________________________________________ 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: What's going on with IOATABlockStorage?
by David Leimbach 24 Jun '05

24 Jun '05

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:in-reply-to:references:mime-version:content-type:message-id:cc:content-transfer-encoding:from:subject:date:to:x-mailer; b=qj7697oBpxjDNRDMQJNa4D7abd2uGoUzsEK33CE+3DcTVL+9u1MYNlWPqHKAuykyw4oUvcMuPEWeu/WjlfJ5fi0s+xMWXEyo5dEHDPqSx0RWBIq6Gkz5lt0g+l0eAaWoud1MPdZtRvRfHERO/OoOcOfa49lEkigWR/ll7tSs31k= I was going to say... this one is missing a lot :) I bet it needs trimming to be pushed out or something :) Dave On Jun 24, 2005, at 12:47 PM, Kevin Van Vechten wrote: On Jun 23, 2005, at 5:12 PM, Kevin Elliott wrote: Is this getting worked on? Yes, this is being worked on. - Kevin _______________________________________________ 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/leimy2k%40gmail.com This email sent to leimy2k(a)gmail.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… I went to download the current source to IOATABlockStorage today, and imagine my surprise when I discovered that it hasn't been available since 10.3.5! What's going on? It's listed in both OpenDarwin and Apple's source site, but neither site actually has it available. This email sent to site_archiver(a)lists.apple.com

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Re: What's going on with IOATABlockStorage?
by Kevin Van Vechten 24 Jun '05

24 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jun 23, 2005, at 5:12 PM, Kevin Elliott wrote: Is this getting worked on? Yes, this is being worked on. - Kevin _______________________________________________ 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 went to download the current source to IOATABlockStorage today, and imagine my surprise when I discovered that it hasn't been available since 10.3.5! What's going on? It's listed in both OpenDarwin and Apple's source site, but neither site actually has it available. This email sent to site_archiver(a)lists.apple.com

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Re: cmpxchgl on x86?
by Shantonu Sen 24 Jun '05

24 Jun '05

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: cmpxchgl on x86?
by David Leimbach 24 Jun '05

24 Jun '05

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=dIZzWBWIz6ul5UlY/YIzMFp00gtWbjSCxDjxgFa097RJyD8wHGW9JIg5jOHG1htByMNSyWoxwdpDrlNNpnFR11dgdl8QB7qyWQc/RGz5oHkpIow0P4DYXjXvHGvwlogwt8mBFe2O+DUgk4+eW7lVUTmpuLuao9o+D45NpZpoIPM= On 6/24/05, David Leimbach <leimy2k(a)gmail.com> wrote: > On 6/24/05, Jonas Maebe <jonas(a)zeus.ugent.be> wrote: > > > > On 24 jun 2005, at 16:40, David Leimbach wrote: > > > > >> Also, there are compare-and-swap routines already in libSystem: > > >> > > >> <libkern/OSAtomic.h> > > >> > > >> /* Compare and swap. They return true if the swap occured. > > >> */ > > >> bool OSAtomicCompareAndSwap32( int32_t oldValue, int32_t newValue, > > >> int32_t *theValue ); > > >> bool OSAtomicCompareAndSwap32Barrier( int32_t oldValue, int32_t > > >> newValue, int32_t *theValue ); > > > > > > Seems a shame to have to include an entire other framework just for a > > > single assembly instruction :). It'd be really cool if apple had a > > > lighter weight wrapper around such lock code :). > > > > libSystem = libc > > Note he wants me to use libkern. Which is it? :) > It seems tiger's libSystem differs here from Panther's too. When in doubt, stick it in libSystem? :) I guess that's better than the 20 libraries I need to link in all the support I need for virtually any application that does networking on Solaris :). Dave _______________________________________________ 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: cmpxchgl on x86?
by David Leimbach 24 Jun '05

24 Jun '05

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=R4pWbhEGE3mUGi9eNxI8XkLkE96zz9RyhqIiCNzNxc4iVK8rsltAAUaN9nZMlMaG6ncPj/Bkkmuvm/qbhwGHXoJapMkkS8MJ6VBG4DnW+tzbAqzUddjsK8vC2zI6RLDdE05ShxFgFdW1cLR2kdrUiP6ONImuADUJhY/5b0UTDP4= On 6/24/05, David Leimbach <leimy2k(a)gmail.com> wrote: > On 6/24/05, Jonas Maebe <jonas(a)zeus.ugent.be> wrote: > > > > On 24 jun 2005, at 16:40, David Leimbach wrote: > > > > >> Also, there are compare-and-swap routines already in libSystem: > > >> > > >> <libkern/OSAtomic.h> > > >> > > >> /* Compare and swap. They return true if the swap occured. > > >> */ > > >> bool OSAtomicCompareAndSwap32( int32_t oldValue, int32_t newValue, > > >> int32_t *theValue ); > > >> bool OSAtomicCompareAndSwap32Barrier( int32_t oldValue, int32_t > > >> newValue, int32_t *theValue ); > > > > > > Seems a shame to have to include an entire other framework just for a > > > single assembly instruction :). It'd be really cool if apple had a > > > lighter weight wrapper around such lock code :). > > > > libSystem = libc > > Note he wants me to use libkern. Which is it? :) Also projects like mach_override include an entire other framework to access that header. It's still too much. It doesn't much matter which library where the binary resides if I have to add another dependency. Way easier is to read the kernel source and figure it out than to call the above routines. [in my opinion]. NetBSD has a nice repository of lock instructions as well. Dave > > > > > > > Jonas > > > > _______________________________________________ > > 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/leimy2k%40gmail.com > > > > This email sent to leimy2k(a)gmail.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: cmpxchgl on x86?
by David Leimbach 24 Jun '05

24 Jun '05

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=TqAI3z59D0+7jYMKkc0Sa6A1nid4S/v7uRqTSRekyAIMrE0l1xVd3y7kj91Nbx0/6N6i5U9YhO/07MZDshVnT1k4pKEWoSWprKVZudsMVibz9ubBI74pU0haol4C8a3zg+ULkNjWqTyqzO1WUMqoIQFYfDgrof7Cprnq84AlzMg= On 6/24/05, Jonas Maebe <jonas(a)zeus.ugent.be> wrote: > > On 24 jun 2005, at 16:40, David Leimbach wrote: > > >> Also, there are compare-and-swap routines already in libSystem: > >> > >> <libkern/OSAtomic.h> > >> > >> /* Compare and swap. They return true if the swap occured. > >> */ > >> bool OSAtomicCompareAndSwap32( int32_t oldValue, int32_t newValue, > >> int32_t *theValue ); > >> bool OSAtomicCompareAndSwap32Barrier( int32_t oldValue, int32_t > >> newValue, int32_t *theValue ); > > > > Seems a shame to have to include an entire other framework just for a > > single assembly instruction :). It'd be really cool if apple had a > > lighter weight wrapper around such lock code :). > > libSystem = libc Note he wants me to use libkern. Which is it? :) > > > Jonas > > _______________________________________________ > 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/leimy2k%40gmail.com > > This email sent to leimy2k(a)gmail.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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