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

bind() not working for outbound socket connections...
by Philip George 22 May '05

22 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com thanks. - philip _______________________________________________ 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… why is bind() not letting me specify a particular interface (on a multihomed system) to send socket messages thru? i have a system with two ports, one is connected to a router that CAN see the internet and and one is connected to a router that CANNOT see the internet. if i try to bind() a socket to the port that connects to the "dead" router, the system still autoroutes it through the good interface to get the message to the web server out on the internet. for most practical purposes, that feature rocks, but for my particular needs, i have to be sure that the messages are being routed out through a specific interface. if there is no good route to the destination address thru the chosen interface, then the subsequent connect() should fail (as opposed to looking for another route). i **don't** want these particular messages autorouted thru any random interface. please tell me how to either get bind() working or to do what i'm trying to do in some other way. This email sent to site_archiver(a)lists.apple.com

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Re: accessing prom
by Dmitry Markman 22 May '05

22 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com thank you very much Justin the following code does the job { const char *computerSerialNumber = NULL; CFTypeRef CFComputerSerialNumber = NULL; io_object_t ioEntry; io_iterator_t ioIterator; kern_return_t kernResult; mach_port_t masterPort; kernResult = IOMasterPort(MACH_PORT_NULL, &masterPort); On May 21, 2005, at 4:10 PM, Justin Walker wrote: On May 21, 2005, at 8:52, Dmitry Markman wrote: Hi is it possible to access PROM data? specifically we need to obtain computer's serial number thanks Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- Some people have a mental horizon of radius zero, and call it their point of view. -- David Hilbert -------- _______________________________________________ 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/dmarkman%40mac.com This email sent to dmarkman(a)mac.com Dmitry Markman _______________________________________________ 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… if(kernResult == KERN_SUCCESS) { kernResult = IORegistryCreateIterator (masterPort,kIOServicePlane,0,&ioIterator); } if(kernResult == KERN_SUCCESS) { ioEntry = IOIteratorNext(ioIterator); if(ioEntry != 0) { CFComputerSerialNumber = IORegistryEntrySearchCFProperty(ioEntry,kIOServicePlane,CFSTR (kIOPlatformSerialNumberKey),kCFAllocatorDefault,0); IOObjectRelease(ioEntry); } IOObjectRelease(ioIterator); } if(CFComputerSerialNumber != NULL) { if(CFStringGetTypeID() == CFGetTypeID (CFComputerSerialNumber)) { computerSerialNumber = CFStringGetCStringPtr ((CFStringRef)CFComputerSerialNumber,kCFStringEncodingMacRoman); } CFRelease(CFComputerSerialNumber); } if(computerSerialNumber != NULL) printf("Serial Number: % s\n",computerSerialNumber); } however I suppose that there is a more elegant way by using some matching facility I don't know how to do that, but 'ioreg -l' will show you the system's serial number (IOPlatformSerialNumber). Digging through the source may help; I took a quick look (IOKitTools project), but nothing said "here I am" ;-/ This email sent to site_archiver(a)lists.apple.com

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Re: accessing prom
by Justin Walker 21 May '05

21 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On May 21, 2005, at 14:14, plumber wrote: That seems extreme for this post :-} j Hi is it possible to access PROM data? specifically we need to obtain computer's serial number thanks Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- Some people have a mental horizon of radius zero, and call it their point of view. -- David Hilbert -------- -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- "Weaseling out of things is what separates us from the animals. Well, except the weasel." - Homer J Simpson -------- _______________________________________________ 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… god bless u Justin :) I don't know how to do that, but 'ioreg -l' will show you the system's serial number (IOPlatformSerialNumber). Digging through the source may help; I took a quick look (IOKitTools project), but nothing said "here I am" ;-/ This email sent to site_archiver(a)lists.apple.com

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Re: accessing prom
by plumber 21 May '05

21 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com god bless u Justin :) Hi is it possible to access PROM data? specifically we need to obtain computer's serial number thanks Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- Some people have a mental horizon of radius zero, and call it their point of view. -- David Hilbert -------- _______________________________________________ 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 don't know how to do that, but 'ioreg -l' will show you the system's serial number (IOPlatformSerialNumber). Digging through the source may help; I took a quick look (IOKitTools project), but nothing said "here I am" ;-/ This email sent to site_archiver(a)lists.apple.com

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Re: Filesystem View
by Chris Zubrzycki 21 May '05

21 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Please try not to top-post and trim the reply'd email also. :-) -chris zubrzycki - -- PGP public key: http://homepage.mac.com/beren/publickey.txt ID: 0xA2ABC070 Fingerprint: 26B0 BA6B A409 FA83 42B3 1688 FBF9 8232 A2AB C070 ======================================================== "Of course, you realize this means war." -B. Bunny _______________________________________________ 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 May 21, 2005, at 11:46 AM, Hamish Allan wrote: I certainly will. I will probably be seeking a lot of advice on this list, as I have never really tried anything like filesystem programming before. I'd like to make this an open-source project -- If anyone else (experienced or otherwise) is interested in helping to make this happen, please get in touch. As for setting up an open source project, you can use lots of things. There is the every popular sourceforge, opendarwin, berlios, and others. They all provide similar services. This email sent to site_archiver(a)lists.apple.com

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Re: accessing prom
by Justin Walker 21 May '05

21 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On May 21, 2005, at 8:52, Dmitry Markman wrote: Hi is it possible to access PROM data? specifically we need to obtain computer's serial number thanks Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- Some people have a mental horizon of radius zero, and call it their point of view. -- David Hilbert -------- _______________________________________________ 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 don't know how to do that, but 'ioreg -l' will show you the system's serial number (IOPlatformSerialNumber). Digging through the source may help; I took a quick look (IOKitTools project), but nothing said "here I am" ;-/ This email sent to site_archiver(a)lists.apple.com

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accessing prom
by Dmitry Markman 21 May '05

21 May '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: Filesystem View
by Hamish Allan 21 May '05

21 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Ingvar, Best wishes, Hamish On 21 May 2005, at 11:15, Ingvar Nedrebo wrote: Hamish, i. On May 20, 2005, at 12:35, Hamish Allan wrote: Mike, You raise very pertinent issues. Thank you for taking an interest. You're right. I think what I want is this sort of thing: $ find /Users/hamish/test -type f /Users/hamish/test/test1/test1.txt /Users/hamish/test/test1/test2.txt /Users/hamish/test/test2/test1.txt /Users/hamish/test/test2/test2.txt $ find /Users/hamish/test -type f -name test1.txt | xargs ls -i 1232001 /Users/hamish/test/test1/test1.txt 1231998 /Users/hamish/test/test2/test1.txt $ find /.slfs/kMDItemFSName==\'test1.txt\' -type f | xargs ls -i 1232001 /.slfs/Users/hamish/test/test1/test1.txt 1231998 /.slfs/Users/hamish/test/test2/test1.txt Yes. Would this problem be circumvented by the above approach? It's an interesting problem; have fun with it! Thanks! Hamish _______________________________________________ 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 certainly will. I will probably be seeking a lot of advice on this list, as I have never really tried anything like filesystem programming before. I'd like to make this an open-source project -- If anyone else (experienced or otherwise) is interested in helping to make this happen, please get in touch. I have a very similar project in mind, but wont get around to it for another couple of months, so it would be great if you could share with the list which approach you end up taking. One thing that you want to consider here is whether you want queries to map to files or directories. I would be inclined to go with the latter, myself, since many queries will yield more than one result (imagine you had two files called 'test.txt' in the above case). How you chose to back the filesystem is really up to you; one approach would simply be to populate the 'cache' directories with symbolic links to the actual files/folders. Another would be to redirect lookups across to the real filesystem. A third (more like WebDAVfs) would be to have the fsnode hold a reference to the 'real' vnode. I'm afraid I don't know enough about filesystems yet to know what the differences between inodes, vnodes and fsnodes are (I've only ever really been an applications programmer up until now) -- and Googling for all three at once didn't turn up any explanation. I will go and dig some more, and also look at the WevDAVfs code. I think what I have described above is more like your second option though? Is that what volfs is doing, do you know? The drawback with the WebDAVfs approach in your case is that modifications to a file might have the effect of moving it out of the 'directory' (because it no longer matches the query), and so the 'path' to the file might change in ways that an application would not be happy about. A problem with the symlink approach would be that it would not be possible to have those files be the 'real' files, so you couldn't e.g. delete them, or move them en masse. This isn't so much a problem because you can get this sort of behaviour with the Finder search box already. I think that none of the folders would be writable, but you could modify the files themselves (seemingly "in place") if you had appropriate permissions, as is the case with volfs. This email sent to site_archiver(a)lists.apple.com

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Re: Filesystem View
by Ingvar Nedrebo 21 May '05

21 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hamish, i. On May 20, 2005, at 12:35, Hamish Allan wrote: Mike, You raise very pertinent issues. Thank you for taking an interest. You're right. I think what I want is this sort of thing: $ find /Users/hamish/test -type f /Users/hamish/test/test1/test1.txt /Users/hamish/test/test1/test2.txt /Users/hamish/test/test2/test1.txt /Users/hamish/test/test2/test2.txt $ find /Users/hamish/test -type f -name test1.txt | xargs ls -i 1232001 /Users/hamish/test/test1/test1.txt 1231998 /Users/hamish/test/test2/test1.txt $ find /.slfs/kMDItemFSName==\'test1.txt\' -type f | xargs ls -i 1232001 /.slfs/Users/hamish/test/test1/test1.txt 1231998 /.slfs/Users/hamish/test/test2/test1.txt Yes. Would this problem be circumvented by the above approach? It's an interesting problem; have fun with it! Thanks! Hamish _______________________________________________ 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 a very similar project in mind, but wont get around to it for another couple of months, so it would be great if you could share with the list which approach you end up taking. One thing that you want to consider here is whether you want queries to map to files or directories. I would be inclined to go with the latter, myself, since many queries will yield more than one result (imagine you had two files called 'test.txt' in the above case). How you chose to back the filesystem is really up to you; one approach would simply be to populate the 'cache' directories with symbolic links to the actual files/folders. Another would be to redirect lookups across to the real filesystem. A third (more like WebDAVfs) would be to have the fsnode hold a reference to the 'real' vnode. I'm afraid I don't know enough about filesystems yet to know what the differences between inodes, vnodes and fsnodes are (I've only ever really been an applications programmer up until now) -- and Googling for all three at once didn't turn up any explanation. I will go and dig some more, and also look at the WevDAVfs code. I think what I have described above is more like your second option though? Is that what volfs is doing, do you know? The drawback with the WebDAVfs approach in your case is that modifications to a file might have the effect of moving it out of the 'directory' (because it no longer matches the query), and so the 'path' to the file might change in ways that an application would not be happy about. A problem with the symlink approach would be that it would not be possible to have those files be the 'real' files, so you couldn't e.g. delete them, or move them en masse. This isn't so much a problem because you can get this sort of behaviour with the Finder search box already. I think that none of the folders would be writable, but you could modify the files themselves (seemingly "in place") if you had appropriate permissions, as is the case with volfs. This email sent to site_archiver(a)lists.apple.com

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Re: Bsd sockets and GCC 4.0
by Justin Walker 21 May '05

21 May '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com I should apologize for this: On May 20, 2005, at 21:11, Justin Walker wrote: Output: Both came across way more snippy than intended. Regards, Justin A good, basic, intro is at <http://www.ecst.csuchico.edu/~beej/guide/net/html/> Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- It's not whether you win or lose... It's whether *I* win or lose. -------- -- Justin C. Walker, Curmudgeon-At-Large Institute for General Semantics -------- "Weaseling out of things is what separates us from the animals. Well, except the weasel." - Homer J Simpson -------- _______________________________________________ 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… [snip] error 48 on socketpair (errno) Do you know what this means? Do you know how to turn an error number into a meaningful message? [snip] I don't have time right now to read the man bind text or google for the socketpair error, but I imagine it will probably help fix the error. Can anyone recommend a good book that covers bsd sockets. I imagine I will have to actually read about sockets before I figure this out. This is good advice; I suggest following it :-} A much better, more in-depth treatment is in W. Richard Stevens' book "Unix Network Programming", v1, 2ed or 3ed (Prentice Hall). This email sent to site_archiver(a)lists.apple.com

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