Changing files on a samba share triggers nothing
Evening, I have a windows proggie that looks at a directory (a samba share in this case) and subscribes to changes. as soon as a file is created there it should pick it up, use it and delete it. I don't have the source of the program to make it peridicly scan the directory, it's only set up to request a callback. I found very little info about samba supporting fam, and either way fam was kicked out of Etch (or maybe earlier?) in favor of a package called gamin on which the entire KDE package set depends. trying to install fam will result in a complete removal of KDE... so, what do I dig for? I must be using the wrong terminology (notify? subscribe?) because Google gets me nowehere. -- Better than the real thing Ira Abramov http://ira.abramov.org/email/ = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Learning kernel modules development
Hi, As you might guess from a previous thread, i am trying to learn modules development. I use kubuntu as my dist. My first goal is to be able to run the hello world module example in the linux device drivers 3rd edition book. Apparently in 2.6 you need to have the whole kernel compiled just to build one module, which is not a problem though i don't want to start spending days tuning it up to work correctly with my system. What should be my workspace so i can start learning: User mode linux? qemu? vmware? XEN :) ? P.s.: naturally i am impatient to start coding yesterday :) 10x. -- Regards, Tzahi. -- Tzahi Fadida Blog: http://tzahi.blogsite.org | Home Site: http://tzahi.webhop.info WARNING TO SPAMMERS: see at http://members.lycos.co.uk/my2nis/spamwarning.html To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: Learning kernel modules development
Tzahi Fadida wrote: Hi, As you might guess from a previous thread, i am trying to learn modules development. I use kubuntu as my dist. My first goal is to be able to run the hello world module example in the linux device drivers 3rd edition book. Apparently in 2.6 you need to have the whole kernel compiled just to build one module, which is not a problem though i don't want to start spending days tuning it up to work correctly with my system. one nice thing in both Redhat RHES 4, and Suse SLES10 (their server editions), is that they have a package that allows compiling out-of-tree kernel modules, without having to recompile the entire kernel. they only contain the build system (Makefiles and all) and header files. if you're using a kubuntu system - check if it has a similar package - i imagine it does - my ubuntu (6.06) has a package named 'linux-headers' that appears to be meant for the same purpose. What should be my workspace so i can start learning: User mode linux? qemu? vmware? XEN :) ? i think you need to first work on your live system. after the first time you wipe out your root file-system - install user-mode-linux and work in that environment ;) you need to have your module completely wipe your system at least once, in order to appreciate the difference between kernel-mode and user-mode development. user-mode-linux is very good, because it allows you to run the kernel (and its module) under gdb - something that's not possible with the other virtualization options (at least not simply, and not safely). i imagine it will take you 1-2-3 full days until you manage to setup a UML (user-mode-linux) environment that is optimal for modules development. note that even under UML - you'll need to have some compiled kernel tree. by the way - you don't need to realy fully-compile the kernel. all you need to do is take the .config file of your currently running kernel (from /boot/config-*, at least on ubuntu and redhat and fedora), put it in the kernel source tree under the name '.config', run 'make oldconfig' and perhaps also 'make prepare' - and the kernel source tree will be configured enough to compile out-of-kernel-tree kernel modules. P.s.: naturally i am impatient to start coding yesterday :) then go to the supermarket and buy some patience - kernel development does not work without a _lot_ of patience. --guy = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: Learning kernel modules development
On Tue, 13 Feb 2007, Tzahi Fadida wrote: Hi, As you might guess from a previous thread, i am trying to learn modules development. I use kubuntu as my dist. My first goal is to be able to run the hello world module example in the linux device drivers 3rd edition book. Apparently in 2.6 you need to have the whole kernel compiled just to build one module, which is not a problem though i don't want to start spending days tuning it up to work correctly with my system. What should be my workspace so i can start learning: User mode linux? qemu? vmware? XEN :) ? P.s.: naturally i am impatient to start coding yesterday :) The Vmware website has an image (called something like network appliance) which is a pre-installed Ubunut virtual machine, all ready to go. Except for the time it takes to download the image, this would save you the time of having to install the guest OS. I have only used Vmware. If such pre-installed images are available for the other virtualization tools, then I don't know which is best. (Re your project: I for one would be interested to hear how your learning goes. Later, perhaps it would make a nice HOWTO or wiki page or something.) Michael = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: Learning kernel modules development
On Tue, 2007-02-13 at 18:54 +0200, Tzahi Fadida wrote: Hi, As you might guess from a previous thread, i am trying to learn modules development. I use kubuntu as my dist. My first goal is to be able to run the hello world module example in the linux device drivers 3rd edition book. Apparently in 2.6 you need to have the whole kernel compiled just to build one module, which is not a problem though i don't want to start spending days tuning it up to work correctly with my system. You don't. You just need the skeleton kernel-devel package. (A cut down kernel image that includes the kernel configuration, headers and kbuild environment) What should be my workspace so i can start learning: User mode linux? qemu? vmware? XEN :) ? In general, I use both VMWare server and an NFS-root-mounted machine. Xen: At least in Fedora-land, it tends to be very sensitive to kernel updates - a very frequent event. QEMU: Too slow. (Even with now-GPL'ed kernel module.) KVM: No hardware support. (Old[er] dual core Opterons @work/home) UML: it has been a while since I used it - but even with the SKAS host-patch, performance is less then staggering and it was -very- sensitive to the base (read: un-patched) kernel versions. NFS-root: The NFS-root is also an interesting option. (If you can spare a second machine/SBC/embedded board) A. You don't risk the host machine. (I did crash vmware/Xen a couple of times - risking the integrity of the host machine) B. The guest machine is booting from a network FS - no matter how painful your crash is (Read: doing memset with a negative size) you won't damage the guest OS image. C. Super fast boot. My NFS test machine (with a modified stripped-down Slackware) boot in less then 15 seconds. P.s.: naturally i am impatient to start coding yesterday :) Yep... Debugging kernel OOPs is pure joy ;) - Gilboa = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: Quickest way to list content of directory(s)
On Mon, 12 Feb 2007 20:21:46 Peter wrote: Is there some utility that can do this very simple search efficiently? Why not use a find predicate for that? Why not write a COBOL application that uses a FORTRAN subroutine to do that ? Actually (and I'm speaking with a LOT of experience) a COBOL program (with or without FORTRAN or C subs) runs at exactly same speed as a C program. BTW, you can call systemcall (like readdir()) directly from COBOL, you don't need any wrapping subroutines. You can try it with the free (and incomplete) GNU tiny COBOL (see: http://tinycobol.org/ ) or with an old (one that compiles to standalone program) MicroFucos COBOL. Ehud. -- Ehud Karni Tel: +972-3-7966-561 /\ Mivtach - Simon Fax: +972-3-7966-667 \ / ASCII Ribbon Campaign Insurance agencies (USA) voice mail and X Against HTML Mail http://www.mvs.co.il FAX: 1-815-5509341 / \ GnuPG: 98EA398D http://www.keyserver.net/Better Safe Than Sorry = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: Learning kernel modules development
On Tue, 13 Feb 2007, Tzahi Fadida wrote: Hi, As you might guess from a previous thread, i am trying to learn modules development. I use kubuntu as my dist. My first goal is to be able to run the hello world module example in the linux device drivers 3rd edition book. Apparently in 2.6 you need to have the whole kernel compiled just to build one module, which is not a problem though i don't want to start spending days tuning it up to work correctly with my system. What should be my workspace so i can start learning: User mode linux? qemu? vmware? XEN :) ? P.s.: naturally i am impatient to start coding yesterday :) The kernel compiles in about 10 minuts max. on any recent machine. What are you afraid of. Peter = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: Learning kernel modules development
And you only ned to do it once, Make is smart enough to recompile only changes after that (when you do make modules). Been there done that. Peter = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: Quickest way to list content of directory(s)
On Tue, 13 Feb 2007, Ehud Karni wrote: On Mon, 12 Feb 2007 20:21:46 Peter wrote: Why not write a COBOL application that uses a FORTRAN subroutine to do that ? Actually (and I'm speaking with a LOT of experience) a COBOL program (with or without FORTRAN or C subs) runs at exactly same speed as a C program. BTW, you can call systemcall (like readdir()) directly from COBOL, you don't need any wrapping subroutines. You can try it with the free (and incomplete) GNU tiny COBOL (see: http://tinycobol.org/ ) or with an old (one that compiles to standalone program) MicroFucos COBOL. Damn I forgot the smiley again. I promise it won't happen again. Peter = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: Quickest way to list content of directory(s)
On 12/02/07, Peter [EMAIL PROTECTED] wrote: Why not write a COBOL application that uses a FORTRAN subroutine to do that ? He wants it to run fast. Write it in machine code! Dotan Cohen http://lyricslist.com/lyrics/artist_albums/643/talib_kweli.html http://what-is-what.com/what_is/quicktime.html = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: Quickest way to list content of directory(s)
To be q... fastest ... use cache! locate -r $PWD/.*/blablabla$ or locate blablabla | grep $PWD On 2/13/07, Dotan Cohen [EMAIL PROTECTED] wrote: On 12/02/07, Peter [EMAIL PROTECTED] wrote: Why not write a COBOL application that uses a FORTRAN subroutine to do that ? He wants it to run fast. Write it in machine code! Dotan Cohen http://lyricslist.com/lyrics/artist_albums/643/talib_kweli.html http://what-is-what.com/what_is/quicktime.html = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED] -- Constantine Shulyupin Embedded Linux Consultant 054-4234440 http://linuxdriver.co.il/ = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: Changing files on a samba share triggers nothing
On 14/02/07, Ira Abramov [EMAIL PROTECTED] wrote: Evening, I have a windows proggie that looks at a directory (a samba share in this case) and subscribes to changes. as soon as a file is created there it should pick it up, use it and delete it. I don't have the source of the program to make it peridicly scan the directory, it's only set up to request a callback. I found very little info about samba supporting fam, and either way fam was kicked out of Etch (or maybe earlier?) in favor of a package called gamin on which the entire KDE package set depends. trying to install fam will result in a complete removal of KDE... so, what do I dig for? I must be using the wrong terminology (notify? subscribe?) because Google gets me nowehere. I'm not sure I follow the sequence of events that you expect - the monitoring program runs on Windows and looks at a directory shared over the network through Samba? Then why is FAM supposed to help here? FAM is a Linux-side thing. Are you looking to create some sort of a proxy that will receive notifications when the directory changes on the Samba server then send an event to the Windows program over the net? As for the linux-level of things - it looks like Gamin is just a subset implementation of FAM ( http://www.gnome.org/~veillard/gamin/) and is based on inotify. So you can either use the FAM API with Gamin or go directly to the system level and use inotify(7) (that would be my personal choice between the two). Cheers, --Amos
Re: revoking old uid's
On 14/02/07, Peter [EMAIL PROTECTED] wrote: revuid means 'revoke uid', as in, id. not the key. Try: gpg --edit-key somebody - key disable; list or: gpg --delete-key signature --yes Revocation is not deletion, it generates a revocation certificate for use later. See man gpg option --gen-revoke . I had to look in the manual. Why didn't you ? Thanks for taking the time to look at the manual. I also looked at the manual before I came here to ask and learned that what I want is to REVOKE an ID, from the manual: deluid Delete a user id. Note that it is not possible to retract a user id, once it has been send to the public (i.e. to a keyserver). In that case you better use revuid. I.e. Just deleting a uid from my local disk isn't going to help advertise to the world the fact that this uid is no longer valid. I want to revoke the UID (and not the entire key) because it shares the key with other uids which I want to keep using. I found the answer - when gpg --edit-key says select uid it means that I have to type the uid n command before typing the command that uses that uid. Same with selecting subkeys using the key command. Thanks, --Amos
Re: Quickest way to list content of directory(s)
He wants it to run fast. Write it in machine code! Just for the record, it is not at all clear that, on modern CPUs, code you write in machine code (or even Assembly) will, in fact, run faster. The compiler can be quite good at opimizing your code for machine language expression, often much better than you would be. Shachar -- Shachar Shemesh Lingnu Open Source Consulting ltd. Have you backed up today's work? http://www.lingnu.com/backup.html = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: Changing files on a samba share triggers nothing
Quoting Amos Shapira, from the post of Wed, 14 Feb: I'm not sure I follow the sequence of events that you expect - the monitoring program runs on Windows and looks at a directory shared over the network through Samba? Then why is FAM supposed to help here? FAM is a Linux-side thing. Are you looking to create some sort of a proxy that will the windows filesystem layer supports callbacks. this means an application can subscribe to a directory or a file, and get notified if something in it changes, like a file is added. the windows-side program is expecting the directory to call it back and so it does not scan the directory repeatedly for new files dropped in Samba, on the other hand, accepts the callback request and is supposed to support this by using fam/gamin to detect changes, since the callback feature is of course not available in the Linux VFS API, or whoever could have been in charge of this. This means that when a file is dropped in a directory that is shared, gamin would notify samba which would notify the remote mounting party that the directory has changed, and the chain is closed. however, this does not seem to work, and I can't find how to turn it on, even though I see that Samba is compiled on Debian with the FAM support. -- Master of magnetism Ira Abramov http://ira.abramov.org/email/ = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
Re: Quickest way to list content of directory(s)
On Wed, Feb 14, 2007 at 08:18:16AM +0200, Shachar Shemesh wrote: Just for the record, it is not at all clear that, on modern CPUs, code you write in machine code (or even Assembly) will, in fact, run faster. The compiler can be quite good at opimizing your code for machine language expression, often much better than you would be. However, a good assembly langunage programer can write code the is leaner and meaner than a compiler generates. In practical terms, a good C programmer can often write code that is close, and parallel processing CPUs where the order of instructions is critical a good compiler can outdo an assembly language programmer. I've kept out of that part of CPU design for a long time, I don't know if anything found on a desktop does it. I think the P4, PPC, and current SPARC chips do, but I would not bet on all of them. It's not new technology, Control Data had it in around 1970. Their chief design engineer was Seymor Cray, who later became famous on his own. It also depends upon the complexity of the intruction set. CISC computers are easy to program in assembly language and get better code, RISC chips become harder as many functions can not be done in machine code and have to be combinations of instructions. Then you are dependent upon how good your skill is at combining instructions or that of the author of your macro library. From my experience good programing technique and logic are far better at producing code effiency than writing in a specific language. I've seen many cases where the order in which you do things effects the preformance more than the languguage they were written in. Geoff. -- Geoffrey S. Mendelson, Jerusalem, Israel [EMAIL PROTECTED] N3OWJ/4X1GM IL Voice: (07)-7424-1667 Fax ONLY: 972-2-648-1443 U.S. Voice: 1-215-821-1838 Visit my 'blog at http://geoffstechno.livejournal.com/ = To unsubscribe, send mail to [EMAIL PROTECTED] with the word unsubscribe in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
