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

Re: Semaphore
by Rakesh Singhal 08 Dec '08

08 Dec '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:date:from:to :subject:cc:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=7dTPK1ldRdJwYfstRVBg3QQ8RwL75ExFo2onHoMT5Rc=; b=GHRSMiNIZ10DCwjyKFfYnZiInyr+eztaD/FuN4Byx64IwTtqSVK+b2SMQngeSsJJzC 5T9/62upuN5A4PITRljQMi5+Rxe9/OLdLLoueM2OvlmwBwyjCNFGqxuB6BvtD5Kgimuk c3xhYgbeVvQdQzR8qu6JrNkS8W0UlIPnjnzpc= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=SPRCDo1kA2xD0UHgk432X5HNMvZNgSy7sf8hAXYjZ7JFhAZRo0EN/3hpIZ98oBDVUA ppLp0N12zvqKHORZAa2b8IpPWJzFzPaNLD+/wnEwLaFFAPDNHqJ1u8ooxpTD7OjhNo/6 sNOR8XWGrClkD0AHxl+fxuuvLdERPBQoFJwP8= I have put 2 dynamic libraries in /usr/lib/ folder and trying to use them using dlopen API. It is working fine with PPC 10.4.9 but I am trying now on 10.5.4 Intel. I do knot know what is happening. It shows: dyld: Library not loaded: /Developer/Library/PrivateFrameworks/ZeroLink.framework/Versions/A/ZeroLink Referenced from: /myProject/myApp Reason: image not found Trace/BPT trap Please suggest me. Thanks in advance. Regards rksinghal On Mon, Dec 1, 2008 at 10:11 AM, Rakesh Singhal <rakesh.singhal(a)gmail.com> wrote: > The dylib will be installed in /usr/lib/ so I can give path > "/usr/lib/libMyDylib.dylib". Yes it is a good idea. Currently both are > in different folders and I am giving "./" path in both (dylib and app) > and generating same key. I hope it would work. Thanks a lot. > > Regards > rksinghal > > On Mon, Dec 1, 2008 at 9:48 AM, Luke Hiesterman <luketheh(a)apple.com> wrote: >> How about the path of the library? It must be in some known location to be >> loaded at runtime. >> >> Luke >> >> Sent from my iPhone. >> >> On Nov 30, 2008, at 8:07 PM, Rakesh Singhal <rakesh.singhal(a)gmail.com> >> wrote: >> >>> Yes that is my query what path to choose to make sure that it would >>> generate same key in both dylib and app. >>> >>> regards >>> >>> On Mon, Dec 1, 2008 at 9:16 AM, Luke Hiesterman <luketheh(a)apple.com> >>> wrote: >>>> >>>> If you use the same path and same id for ftok on both processes then you >>>> will get the same key for use with semget. This is precisely the purpose >>>> of >>>> ftok. >>>> >>>> Luke >>>> >>>> Sent from my iPhone. >>>> >>>> On Nov 30, 2008, at 7:15 PM, Rakesh Singhal <rakesh.singhal(a)gmail.com> >>>> wrote: >>>> >>>>> Thanks. The problem I have to give file path to generate key. How will >>>>> I ensure that the path I am giving will work always to generate the >>>>> same key? I have one application and another is dynamic library and I >>>>> want to generate the same key in both to use. >>>>> >>>>> Regards >>>>> rksinghal >>>>> >>>>> >>>>> On Mon, Dec 1, 2008 at 12:56 AM, Luke Hiesterman <luketheh(a)apple.com> >>>>> wrote: >>>>>> >>>>>> Why exactly do you want to avoid ftok? It's a good way to generate >>>>>> shared >>>>>> keys. >>>>>> >>>>>> It's always possible to generate an integer key some other way yourself >>>>>> and >>>>>> then you just have to figure out how to communicate it across >>>>>> processes. >>>>>> You >>>>>> could write it to a file or send it over a socket. >>>>>> >>>>>> Luke >>>>>> >>>>>> Sent from my iPhone. >>>>>> >>>>>> On Nov 30, 2008, at 3:25 AM, Rakesh Singhal <rakesh.singhal(a)gmail.com> >>>>>> wrote: >>>>>> >>>>>>> Is it possible to use semget() without using ftok() for IPC >>>>>>> communication? >>>>>>> >>>>>>> Please suggest me. >>>>>>> >>>>>>> Regards >>>>>>> rksinghal >>>>>>> >>>>>>> On Fri, Nov 28, 2008 at 9:54 AM, Rakesh Singhal >>>>>>> <rakesh.singhal(a)gmail.com> wrote: >>>>>>>> >>>>>>>> Thanks. Now I am using following set of APIs: >>>>>>>> >>>>>>>> ftok() >>>>>>>> semget() >>>>>>>> semop() >>>>>>>> semctl() >>>>>>>> >>>>>>>> It is working till now :) >>>>>>>> >>>>>>>> Regards >>>>>>>> rksinghal >>>>>>>> >>>>>>>> On Thu, Nov 27, 2008 at 9:49 AM, Terry Lambert <tlambert(a)apple.com> >>>>>>>> wrote: >>>>>>>>> >>>>>>>>> On Nov 26, 2008, at 7:31 PM, Rakesh Singhal wrote: >>>>>>>>>> >>>>>>>>>> Hi all >>>>>>>>>> >>>>>>>>>> I tried to use sem_init() but I think it is not there to use. It is >>>>>>>>>> declared in semaphore.h but when I do man sem_init() then it gives >>>>>>>>>> the >>>>>>>>>> message "No manual entry for sem_init". >>>>>>>>>> >>>>>>>>>> Now, I am using sem_open(). I think it is right API to create >>>>>>>>>> unique >>>>>>>>>> semaphore between multi-processes. But creating it in one process >>>>>>>>>> if >>>>>>>>>> I >>>>>>>>>> try to create in another process, the value of semaphore is not >>>>>>>>>> same. >>>>>>>>>> I am using same name in both process(1st argument of sem_open()). >>>>>>>>>> >>>>>>>>>> Please suggest to create semaphore (cross-processes). >>>>>>>>> >>>>>>>>> POSIX unnamed semaphores are not supported. >>>>>>>>> >>>>>>>>> Use either POSIX named semaphores, or use System V semaphores: >>>>>>>>> >>>>>>>>> man sem_open >>>>>>>>> man semget >>>>>>>>> >>>>>>>>> -- 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… This email sent to site_archiver(a)lists.apple.com

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Re: Increase read buffer size.
by Sachin Kumar 08 Dec '08

08 Dec '08

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Re: Increase read buffer size.
by Sachin Kumar 07 Dec '08

07 Dec '08

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Re: Increase read buffer size.
by Terry Lambert 07 Dec '08

07 Dec '08

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Increase read buffer size.
by Sachin Kumar 06 Dec '08

06 Dec '08

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kevent timers: Supported or not supported ?
by Jean-Daniel Dupas 05 Dec '08

05 Dec '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hello, _______________________________________________ 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 wondering if someone here already try to play with kevent's timers. The man page says there are not supported, but when I looked in the kernel sources, I saw that timer was in fact implemented. Is the man page outdated, or are they implemented but have some issues that prevent using them ? This email sent to site_archiver(a)lists.apple.com

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Re: Communication over usb serial cable
by Rakesh Singhal 05 Dec '08

05 Dec '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:date:from:to :subject:cc:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=dyoAV4HhpK5pLcLJL2c3sHpBixGMVsx96c3AqZiTxtM=; b=SAeBzEazo14WWfiDsQ+3rWh/8YOUXyt2XscsSIznaUBDlZJxnZvILE1wV+30I+47VZ wZqdRK+7bmLaNlvsecIuV/ZmVjXeRdqOS28/DQ8yhtEyEIzunaV6vuUT3Blxo3/l241g VbWaIMW3ho2jvZxIRikHSTnUYkyMQYm4d8OTI= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=HxAbeO0STz89k0j4qa+PI4H2y3S9/bnco/d8/e6W3k8clgLzq2MLCskV0z+aqtS/w9 DzGKS4ASjA2fl+n2QRn+9alLZJ8NSWOdjyoF/DMlLCofskT/SFoTlgoBSgdIc9gUMuDS PGdlJ4zhGlI0ol2QQCtkwbS25dZi/4ICRpwDw= Hi Terry, Thanks a lot. I configured everything properly except handshaking and by mistake I modified c_cflag instead of c_iflag. now it is working. Sorry to trouble you. Now it is working fine. Regards rksinghal On Fri, Dec 5, 2008 at 5:07 PM, Terry Lambert <tlambert(a)apple.com> wrote: > On Dec 5, 2008, at 12:01 AM, Rakesh Singhal wrote: >> >> I am not sure that this is the proper list to put my query. I have >> connected my windows system to Mac using usb serial cable. >> >> mac ----- usb port <-----> usb serial cable <-----> serial port ---- >> windows >> >> First case where I am using ZTerm utility on Mac to communicate with >> Hyper terminal on windows. I configured and it is working properly. >> >> Second case, I have my application instead of ZTerm utility and I >> configured. Now when I send any data from hyper terminal, I get it in >> my application on Mac but not in proper format. Like if I press C in >> Hyper terminal, it shows #? (2 bytes) in Mac. >> >> Please suggest what I am missing here so that at least I am able to >> get proper data like ZTerm. >> >> Configuration details: >> >> baud - 115200 >> stop bit - 1 >> parity - NO >> data bits - 8 >> enable CLOCAL and CREAD. >> >> >> One more thing if I check my application with any modem attached on >> Mac only then I get the proper response of command like ATI etc. > > > CLOCAL and CREAD are irrelevant; CLOCAL simply means you do ignore modem > status lines, and CREAD simply means you will allow receives. > > Different or multiple characters received with a single character > transmitted is typically an indication that the receive baud rate is higher > than the transmit baud rate, and therefore there is sampling occurring. > Very old systems with tightly controlled UART parts used for their > implementation used to used this technique to recognize the baud rate of > inbound modem connections by comparing the sample bit pattern vs. the known > sample patterns for the CR character at various known baud rates well below > the sample baud rate; hit return a couple of times, and "presto! login: " at > the right baud rate. > > It can also typically happen if the bit framing is off - e.g. when you tell > it to use other than 8 bits of data, either by mistakenly specifying > something other than 7 bits with some type of parity, or specifying > something other than 8 bits with no parity, or you've set the wrong number > of stop bits, etc.. > > With a little hand-waving, if your example of 'C' is an actual example, and > we assume that the '?' was representing an unprintable character from line > garbage or you hiting areturn character after the 'C', and the '#' was > representing a printable '#' then: > > C 0x43 01000011 > # 0x23 00100011 > > strongly implies that the bits are being time-compressed, implicating that > the transmit baud rate is higher than the receive baud rate. > > I'd suggest either looking at the source code for known working programs > (Apple supplies 'cu', 'uucp', and similar programs in source form), or > finding a book or guide online, such as: > > <http://www.easysw.com/~mike/serial/ > or > <http://digilander.libero.it/robang/rubrica/serial.htm> > > to use as a starting point on UNIX serial programming, since you probably at > least have your baud rate set wrong. > > Note that the above referenced material plays things a little loose with > standards-controlled definitions, but has good UNIX programming information. > > -- 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… This email sent to site_archiver(a)lists.apple.com

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Re: Communication over usb serial cable
by Terry Lambert 05 Dec '08

05 Dec '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com I am not sure that this is the proper list to put my query. I have connected my windows system to Mac using usb serial cable. First case where I am using ZTerm utility on Mac to communicate with Hyper terminal on windows. I configured and it is working properly. Second case, I have my application instead of ZTerm utility and I configured. Now when I send any data from hyper terminal, I get it in my application on Mac but not in proper format. Like if I press C in Hyper terminal, it shows #? (2 bytes) in Mac. Please suggest what I am missing here so that at least I am able to get proper data like ZTerm. Configuration details: baud - 115200 stop bit - 1 parity - NO data bits - 8 enable CLOCAL and CREAD. One more thing if I check my application with any modem attached on Mac only then I get the proper response of command like ATI etc. C 0x43 01000011 # 0x23 00100011 <http://www.easysw.com/~mike/serial/ or <http://digilander.libero.it/robang/rubrica/serial.htm> -- 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 Dec 5, 2008, at 12:01 AM, Rakesh Singhal wrote: mac ----- usb port <-----> usb serial cable <-----> serial port ---- windows CLOCAL and CREAD are irrelevant; CLOCAL simply means you do ignore modem status lines, and CREAD simply means you will allow receives. Different or multiple characters received with a single character transmitted is typically an indication that the receive baud rate is higher than the transmit baud rate, and therefore there is sampling occurring. Very old systems with tightly controlled UART parts used for their implementation used to used this technique to recognize the baud rate of inbound modem connections by comparing the sample bit pattern vs. the known sample patterns for the CR character at various known baud rates well below the sample baud rate; hit return a couple of times, and "presto! login: " at the right baud rate. It can also typically happen if the bit framing is off - e.g. when you tell it to use other than 8 bits of data, either by mistakenly specifying something other than 7 bits with some type of parity, or specifying something other than 8 bits with no parity, or you've set the wrong number of stop bits, etc.. With a little hand-waving, if your example of 'C' is an actual example, and we assume that the '?' was representing an unprintable character from line garbage or you hiting areturn character after the 'C', and the '#' was representing a printable '#' then: strongly implies that the bits are being time-compressed, implicating that the transmit baud rate is higher than the receive baud rate. I'd suggest either looking at the source code for known working programs (Apple supplies 'cu', 'uucp', and similar programs in source form), or finding a book or guide online, such as: to use as a starting point on UNIX serial programming, since you probably at least have your baud rate set wrong. Note that the above referenced material plays things a little loose with standards-controlled definitions, but has good UNIX programming information. This email sent to site_archiver(a)lists.apple.com

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Communication over usb serial cable
by Rakesh Singhal 05 Dec '08

05 Dec '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:date:from:to :subject:mime-version:content-type:content-transfer-encoding :content-disposition; bh=JZels5aMGDgZw+HH0oB32wmj7COOMIiP04IFk5kXb/8=; b=fxYosWTw2cF5wY8YqKcSIEqfZrkS6wtCLu0y+HJDWX+KEviVI22OmYsQ4AIOdKIE4o UMQUus66Im36+7SIQxYA1U6TzBGUa/FWiChJy+zUofwEolM4sQSOzCJfFjnl8vJJx2B6 n4wRM+2/ZehOl6bgX4S+WjawIyNo4mfqrT0BQ= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:mime-version:content-type :content-transfer-encoding:content-disposition; b=EYx9LMob9BV7BjcQXG3zKmPEX5syujYXtrcQf7hOG29RJbjX/Y5IuKEV/EOxJ4dfJd xmvZ/KmkIQTyPuvJszXyZ/8ZGHCNISlRnY0uTWSgf7SIt7zwGAhcG70MIrigLG5m/PqV 1Q8WaxdKYxVKIfJVlJpi0yVdc+gWlfnnKt+JM= Hi all I am not sure that this is the proper list to put my query. I have connected my windows system to Mac using usb serial cable. mac ----- usb port <-----> usb serial cable <-----> serial port ---- windows First case where I am using ZTerm utility on Mac to communicate with Hyper terminal on windows. I configured and it is working properly. Second case, I have my application instead of ZTerm utility and I configured. Now when I send any data from hyper terminal, I get it in my application on Mac but not in proper format. Like if I press C in Hyper terminal, it shows #? (2 bytes) in Mac. Please suggest what I am missing here so that at least I am able to get proper data like ZTerm. Configuration details: baud - 115200 stop bit - 1 parity - NO data bits - 8 enable CLOCAL and CREAD. One more thing if I check my application with any modem attached on Mac only then I get the proper response of command like ATI etc. Regards rksinghal _______________________________________________ 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: Semaphore
by Luke Hiesterman 01 Dec '08

01 Dec '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Good point. /usr/local/lib would be more appropriate. Sent from my iPhone. On Nov 30, 2008, at 9:12 PM, Philip Aker <philip.aker(a)shaw.ca> wrote: On 2008-11-30, at 20:41:02, Rakesh Singhal wrote: I would like to ask how brazen it is to install at this location. Philip Aker echo astwta@lvpc.dslh@nl | tr a-z@. p-za-o.@ Democracy: Two wolves and a sheep voting on lunch. _______________________________________________ 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/luketheh%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… The dylib will be installed in /usr/lib/ … I normally work a couple of levels up the hierarchy and, as a third party developer, wouldn't (for example) install anything in /System/ Library/Frameworks. This email sent to luketheh(a)apple.com This email sent to site_archiver(a)lists.apple.com

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