Relocatable linking on x86-64 for i386
Hello. I am trying to make relocatable linking on x86-64 box for objects in format i386 Naive ld -r file1.o file2.o -o output.o produce ld: Relocatable linking with relocations from format elf32-i386 (file1.o) to format elf64-x86-64 (output.o) is not supported But even when I add --oformat situation not improved: ld --output-format elf32-i386 -r file1.o file2.o -o output.o ld: Relocatable linking with relocations from format elf32-i386 (file1.o) to format elf32-i386 (output.o) is not supported So linker correctly recognize what input and output format should be, but for some reason don't want do it. Do you have any ideas if it can be done at all and how? Thanks. Valery ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Relocatable linking on x86-64 for i386
On 04/04/11 10:15, Valery Reznic wrote: Hello. I am trying to make relocatable linking on x86-64 box for objects in format i386 Naive ld -r file1.o file2.o -o output.o produce ld: Relocatable linking with relocations from format elf32-i386 (file1.o) to format elf64-x86-64 (output.o) is not supported But even when I add --oformat situation not improved: ld --output-format elf32-i386 -r file1.o file2.o -o output.o ld: Relocatable linking with relocations from format elf32-i386 (file1.o) to format elf32-i386 (output.o) is not supported So linker correctly recognize what input and output format should be, but for some reason don't want do it. Do you have any ideas if it can be done at all and how? Can't. You're trying to link objects compiled for different machine codes. Tis not the linking stage that is wrong. While it is possible to run both machine codes on your computer, they must run in different processes (the kernel actually treats x86 and amd64 codes differently when it sets up the registers for the context switch), and thus you cannot link them into a single executable, cannot dynamically load one from the other, and cannot have two threads with different types. Your only option for interaction is RPC of some sort (or recompile one of them). Shachar -- Shachar Shemesh Lingnu Open Source Consulting Ltd. http://www.lingnu.com ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Creating a User with Access to a Single Command
Hi all, I want to create a user that will be able to only run ssh. I thought of sudo, but I am not sure how to configure it right so he will not be able to run anything else... Can you help me with the settings in the /etc/sudoers? Thanks! Amichai. ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Creating a User with Access to a Single Command
That's not what you want. Please read about restricted shell. A working example: /etc/passwd: ariel:x:uid:gid::/home/ariel:/bin/rbash ls -l /bin/rbash lrwxrwxrwx 1 root root 4 Apr 10 2006 /bin/rbash - bash drwx-t 4 ariel mygroup 4096 Apr 1 22:50 /home/ariel ls -al ~ariel -r-xr-xr-x1 root root 688 Apr 7 2010 .profile -rw-r--r--1 root root 0 Apr 7 2010 .inputrc lrwxrwxrwx1 root root 8 Apr 7 2010 .bashrc - .profile lrwxrwxrwx1 root root 8 Apr 7 2010 .bash_profile - .profile -rw-r--r--1 root root 0 Apr 7 2010 .bash_logout lrwxrwxrwx1 root root 8 Apr 7 2010 .bash_login - .profile drwx--2 ariel mygroup 4096 Apr 23 2010 .ssh -rw---1 ariel mygroup 660 Apr 1 22:50 .Xauthority cat .profile #! /bin/rbash declare -r PS1='(myhost)' unset BASH_VERSION unset HISTFILE unset HISTFILESIZE unset HOSTTYPE unset MACHTYPE unset OSTYPE unset _INIT_PREV_LEVEL unset _INIT_RUN_LEVEL unset _INIT_RUN_NPREV unset _INIT_UTS_ISA unset _INIT_UTS_MACHINE unset _INIT_UTS_NODENAME unset _INIT_UTS_PLATFORM unset _INIT_UTS_RELEASE unset _INIT_UTS_SYSNAME unset _INIT_UTS_VERSION unset PATH unset MAIL unset MAILCHECK unset HISTFILESIZE unset HISTSIZE unset HZ unset PS2 unset PS4 declare -rx PATH=/usr/local/restricted declare -rx HOSTNAME=myhost.mydomain declare -rx TZ=Israel echo Welcome to gate. The following commands can be used: telnet, ssh. declare -rx HOME=~ = ls -l /usr/local/restricted lrwxrwxrwx 1 root root 12 Apr 10 2006 ssh - /usr/bin/ssh lrwxrwxrwx 1 root root 24 Mar 13 2006 telnet - /usr/kerberos/bin/telnet -- Ariel -- Ariel Biener e-mail: ar...@post.tau.ac.il PGP: http://www.tau.ac.il/~ariel/pgp.html ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Relocatable linking on x86-64 for i386
--- On Mon, 4/4/11, Shachar Shemesh shac...@shemesh.biz wrote: From: Shachar Shemesh shac...@shemesh.biz Subject: Re: Relocatable linking on x86-64 for i386 To: Valery Reznic valery_rez...@yahoo.com Cc: linux-il@cs.huji.ac.il Date: Monday, April 4, 2011, 11:13 AM On 04/04/11 10:15, Valery Reznic wrote: Hello. I am trying to make relocatable linking on x86-64 box for objects in format i386 Naive ld -r file1.o file2.o -o output.o produce ld: Relocatable linking with relocations from format elf32-i386 (file1.o) to format elf64-x86-64 (output.o) is not supported But even when I add --oformat situation not improved: ld --output-format elf32-i386 -r file1.o file2.o -o output.o ld: Relocatable linking with relocations from format elf32-i386 (file1.o) to format elf32-i386 (output.o) is not supported So linker correctly recognize what input and output format should be, but for some reason don't want do it. Do you have any ideas if it can be done at all and how? Can't. You're trying to link objects compiled for different machine codes. Tis not the linking stage that is wrong. I am not trying to mix i386 and x86_64 code in the same object. I have two object files for i386 and I want to combine it into one object file for i386 two. It works perfectly well on i386 box, but on x86-64 it's not. Valery. While it is possible to run both machine codes on your computer, they must run in different processes (the kernel actually treats x86 and amd64 codes differently when it sets up the registers for the context switch), and thus you cannot link them into a single executable, cannot dynamically load one from the other, and cannot have two threads with different types. Your only option for interaction is RPC of some sort (or recompile one of them). Shachar -- Shachar Shemesh Lingnu Open Source Consulting Ltd. http://www.lingnu.com ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Relocatable linking on x86-64 for i386
On Mon, Apr 4, 2011 at 10:15 AM, Valery Reznic valery_rez...@yahoo.comwrote: Hello. I am trying to make relocatable linking on x86-64 box for objects in format i386 Naive ld -r file1.o file2.o -o output.o produce ld: Relocatable linking with relocations from format elf32-i386 (file1.o) to format elf64-x86-64 (output.o) is not supported But even when I add --oformat situation not improved: ld --output-format elf32-i386 -r file1.o file2.o -o output.o ld: Relocatable linking with relocations from format elf32-i386 (file1.o) to format elf32-i386 (output.o) is not supported So linker correctly recognize what input and output format should be, but for some reason don't want do it. Do you have any ideas if it can be done at all and how? Maybe your system is pure-64 ? (i.e. no 32 bit libs / compiler / linker support?) Can you compile a 32 bit with gcc -m32 ? -- Shimi ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Relocatable linking on x86-64 for i386
On Mon, Apr 04, 2011 at 02:06:18AM -0700, Valery Reznic wrote: --- On Mon, 4/4/11, Shachar Shemesh shac...@shemesh.biz wrote: From: Shachar Shemesh shac...@shemesh.biz Subject: Re: Relocatable linking on x86-64 for i386 To: Valery Reznic valery_rez...@yahoo.com Cc: linux-il@cs.huji.ac.il Date: Monday, April 4, 2011, 11:13 AM On 04/04/11 10:15, Valery Reznic wrote: Hello. I am trying to make relocatable linking on x86-64 box for objects in format i386 Naive ld -r file1.o file2.o -o output.o produce ld: Relocatable linking with relocations from format elf32-i386 (file1.o) to format elf64-x86-64 (output.o) is not supported But even when I add --oformat situation not improved: ld --output-format elf32-i386 -r file1.o file2.o -o output.o ld: Relocatable linking with relocations from format elf32-i386 (file1.o) to format elf32-i386 (output.o) is not supported So linker correctly recognize what input and output format should be, but for some reason don't want do it. Do you have any ideas if it can be done at all and how? Can't. You're trying to link objects compiled for different machine codes. Tis not the linking stage that is wrong. I am not trying to mix i386 and x86_64 code in the same object. I have two object files for i386 and I want to combine it into one object file for i386 two. It works perfectly well on i386 box, but on x86-64 it's not. ld -m elf_i386 -r file1.o file2.o -o output.o Valery. While it is possible to run both machine codes on your computer, they must run in different processes (the kernel actually treats x86 and amd64 codes differently when it sets up the registers for the context switch), and thus you cannot link them into a single executable, cannot dynamically load one from the other, and cannot have two threads with different types. Your only option for interaction is RPC of some sort (or recompile one of them). Shachar -- Shachar Shemesh Lingnu Open Source Consulting Ltd. http://www.lingnu.com ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il -- Gleb. ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Relocatable linking on x86-64 for i386
ld --output-format elf32-i386 -r file1.o file2.o -o output.o ld: Relocatable linking with relocations from format elf32-i386 (file1.o) to format elf32-i386 (output.o) is not supported ld -m elf_i386 -r file1.o file2.o -o output.o Thanks, it works!! Great!!! Valery Valery. While it is possible to run both machine codes on your computer, they must run in different processes (the kernel actually treats x86 and amd64 codes differently when it sets up the registers for the context switch), and thus you cannot link them into a single executable, cannot dynamically load one from the other, and cannot have two threads with different types. Your only option for interaction is RPC of some sort (or recompile one of them). Shachar -- Shachar Shemesh Lingnu Open Source Consulting Ltd. http://www.lingnu.com ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il -- Gleb. ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
MediaWiki sorting the Hebrew Alphabet
On several sites I manage I have this problem - Category pages display articles and subcategories sorted absolutely wrong. As far as I can tell this is only a Hebrew issue. Anyone got a clue? Someone told me it may be a question of DB collation or something, but I don't want to touch anything irreversibly without knowing exactly what would happen. Example: http://ecowiki.site.co.il/%D7%A7%D7%98%D7%92%D7%95%D7%A8%D7%99%D7%94:%D7%9E%D7%A2%D7%A8%D7%9B%D7%95%D7%AA -- King of the wild things Ira Abramov http://ira.abramov.org/email/ ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: Relocatable linking on x86-64 for i386
On Mon, 4 Apr 2011 13:15:39 Gleb Natapov wrote: On 04/04/11 10:15, Valery Reznic wrote: Hello. I am trying to make relocatable linking on x86-64 box for objects in format i386 ld -m elf_i386 -r file1.o file2.o -o output.o If you use gcc for compiling you can do gcc -m32 arguments to compile and link. In fact you can do: gcc -m32 file1.o file2.o -o output.o instead of calling ld directly. Ehud. -- Ehud Karni Tel: +972-3-7966-561 /\ Mivtach - Simon Fax: +972-3-7976-561 \ / 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 ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: MediaWiki sorting the Hebrew Alphabet
Quoting Ira Abramov lists-linux...@ira.abramov.org: Quoting Herouth Maoz, from the post of Mon, 04 Apr: Which database are you using? As far as I know, both PostgreSQL and MySQL are dependent on the usual libraries for their sorting algorithms, and therefore on the variable LC_COLLATE. using MySQL and the collation is settable after the fact, but I'm not sure which table/column to change and to what. As far as I can gather, you can sort with a specific collation, but this would mean going through the entire application and changing the SQL statements to use the COLLATE operator. I wouldn't go that way. I believe in order to solve the problem you have to set up your database with the proper collation to begin with - dump the database to text, re-create it with proper character set and collation, and then reload it. I think utf8 and utf8_general_ci are supposed to work properly for Hebrew. You can always test it by creating a little database somewhere with the settings you expect to work, create a table, insert a few words in Hebrew, and select it with order by. ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: MediaWiki sorting the Hebrew Alphabet
Quoting Ira Abramov lists-linux...@ira.abramov.org: On several sites I manage I have this problem - Category pages display articles and subcategories sorted absolutely wrong. As far as I can tell this is only a Hebrew issue. Anyone got a clue? Someone told me it may be a question of DB collation or something, but I don't want to touch anything irreversibly without knowing exactly what would happen. Which database are you using? As far as I know, both PostgreSQL and MySQL are dependent on the usual libraries for their sorting algorithms, and therefore on the variable LC_COLLATE. I'm not sure, though, whether it's something you can change in runtime. Last time that I tried, PostgreSQL took the value of the environment variable at the time of creation of a database cluster, which meant that changing it would require backing up, re-creating the cluster, and reloading the database. I'm less familiar with mySQL and how it relates to said environment variable. Herouth ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
VLC can read it but I cannot?
I have a CD with a short video film on it. I can see the video using VLC but when I try to copy the VIDEO_TS I get an error: ls -al /media/cdrom/ ls: cannot access /media/cdrom/.: Permission denied ls: cannot access /media/cdrom/..: Permission denied ls: cannot access /media/cdrom/VIDEO_TS: Permission denied total 0 d? ? ? ? ?? . d? ? ? ? ?? .. ?? ? ? ? ?? VIDEO_TS gabor@localhost:~$ ls -al /media/cdrom/VIDEO_TS ls: cannot access /media/cdrom/VIDEO_TS: Permission denied sudo ls -la /media/cdrom/ ls: cannot access /media/cdrom/VIDEO_TS: Permission denied total 6 dr--r--r-- 3 4294967295 4294967295 88 2006-09-26 16:23 . drwxr-xr-x 4 root root 4096 2011-04-04 23:00 .. ?? ? ? ? ?? VIDEO_TS gabor@localhost:~$ sudo ls -la /media/cdrom/VIDEO_TS ls: cannot access /media/cdrom/VIDEO_TS: Permission denied Any idea why is that and how could I copy the video? BTW running Ubuntu 10.10 and this is a personal video. Gabor ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: VLC can read it but I cannot?
On Tue, Apr 5, 2011 at 12:56 AM, Gabor Szabo szab...@gmail.com wrote: I have a CD with a short video film on it. I can see the video using VLC but when I try to copy the VIDEO_TS I get an error: ls -al /media/cdrom/ ls: cannot access /media/cdrom/.: Permission denied ls: cannot access /media/cdrom/..: Permission denied ls: cannot access /media/cdrom/VIDEO_TS: Permission denied total 0 d? ? ? ? ?? . d? ? ? ? ?? .. ?? ? ? ? ?? VIDEO_TS gabor@localhost:~$ ls -al /media/cdrom/VIDEO_TS ls: cannot access /media/cdrom/VIDEO_TS: Permission denied sudo ls -la /media/cdrom/ ls: cannot access /media/cdrom/VIDEO_TS: Permission denied total 6 dr--r--r-- 3 4294967295 4294967295 88 2006-09-26 16:23 . drwxr-xr-x 4 root root 4096 2011-04-04 23:00 .. ?? ? ? ? ?? VIDEO_TS gabor@localhost:~$ sudo ls -la /media/cdrom/VIDEO_TS ls: cannot access /media/cdrom/VIDEO_TS: Permission denied Any idea why is that and how could I copy the video? You could unmount /media/cdrom and just dd the whole device into an iso file. Maybe it's even how VLC plays it :) -- Shimi ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
Re: VLC can read it but I cannot?
How did you mount the CD ? When you write $ mount What are the information you have on it ? Ido LINESIP - Opening the source for communication http://www.linesip.com http://www.linesip.co.il On Tue, Apr 5, 2011 at 00:56, Gabor Szabo szab...@gmail.com wrote: I have a CD with a short video film on it. I can see the video using VLC but when I try to copy the VIDEO_TS I get an error: ls -al /media/cdrom/ ls: cannot access /media/cdrom/.: Permission denied ls: cannot access /media/cdrom/..: Permission denied ls: cannot access /media/cdrom/VIDEO_TS: Permission denied total 0 d? ? ? ? ?? . d? ? ? ? ?? .. ?? ? ? ? ?? VIDEO_TS gabor@localhost:~$ ls -al /media/cdrom/VIDEO_TS ls: cannot access /media/cdrom/VIDEO_TS: Permission denied sudo ls -la /media/cdrom/ ls: cannot access /media/cdrom/VIDEO_TS: Permission denied total 6 dr--r--r-- 3 4294967295 4294967295 88 2006-09-26 16:23 . drwxr-xr-x 4 root root 4096 2011-04-04 23:00 .. ?? ? ? ? ?? VIDEO_TS gabor@localhost:~$ sudo ls -la /media/cdrom/VIDEO_TS ls: cannot access /media/cdrom/VIDEO_TS: Permission denied Any idea why is that and how could I copy the video? BTW running Ubuntu 10.10 and this is a personal video. Gabor ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il ___ Linux-il mailing list Linux-il@cs.huji.ac.il http://mailman.cs.huji.ac.il/mailman/listinfo/linux-il
