Error Ld.so From Ld_preload Cannot Be Preloaded Ignored
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Ld_preload Cannot Be Preloaded (wrong Elf Class Elfclass32)
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Error: Ld.so: Object Steam
vote favorite I am using ubuntu 12.04. Every time I start my bash terminal and every time when I finish typing a command(and press enter) , I get this message: ERROR: ld.so: object '/usr/lib/liblunar-calendar-preload.so' from LD_PRELOAD cannot be preloaded: ignored. It is weird. So what is the environment variable LD_PRELOAD used for? And what is the going on behind the scene? Thanks. linux bash share|improve this question asked Jul libsigchain.so cannot be preloaded 18 '13 at 12:37 lulyon 3,00531638 1 Some libraries are only loaded when they are used. I think with the LD_PRELOAD variable you can try to load a library whether you use it or not before the program starts running. –hetepeperfan Jul 18 '13 at 12:40 @hetepeperfan And every time I enter a command, I get the message too. What should that be explained? –lulyon Jul 18 '13 at 12:45 Are you using a custom built bash? –devnull Jul 18 '13 at 12:49 @devnull I am using the default bash. That is Application-> Accessory ->Terminal. –lulyon Jul 18 '13 at 12:52 1 Does this give you an error? unset LD_PRELOAD; ls –devnull Jul 18 '13 at 13:05 | show 5 more comments 3 Answers 3 active oldest votes up vote 4 down vote accepted The linker takes some environmental variables in to acount. one is LD_PRELOAD from man 8 ld-linux : LD_PRELOAD A whitespace-separated list of additional, user-specified, ELF shared libraries to be loaded before all others. This can be used to selectively override functions in other shared libraries. For setuid/setgid ELF binaries, only libraries in the standard search directories that are also setgid will be loade
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Ld_preload Environment Variable
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Ld_preload Libc
Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just ld_preload example like you, helping each other. Join them; it only takes a minute: Sign up When will LD_PRELOAD be ignored up vote 1 down vote favorite I'm trying to use LD_PRELOAD to wrap some functions in a system, http://stackoverflow.com/questions/17723666/error-ld-so-object-ld-preload-cannot-be-preloaded-ignored I first exported the environment variable LD_PRELOAD to point to my .so file, then I run the system, I always get ERROR: ld.so: object '/full/path/to/wrap.so' from LD_PRELOAD cannot be preloaded: ignored. So I tried to understand LD_PRELOAD on the man page: A list of additional, user-specified, ELF shared libraries to be loaded before all others. The items of the list can be separated by spaces or colons. This can be used to selectively override functions http://stackoverflow.com/questions/29273277/when-will-ld-preload-be-ignored in other shared libraries. The libraries are searched for using the rules given under DESCRIPTION. For set-user-ID/set-group-ID ELF binaries, preload pathnames containing slashes are ignored, and libraries in the standard search directories are loaded only if the set-user-ID permission bit is enabled on the library file. I don't 100% understand the above text, first, it says For set-user-ID/set-group-ID ELF binaries, preload pathnames containing slashes are ignored If I can't use slashes, how can I set the full path of LA_PRELOAD? second, it says and libraries in the standard search directories are loaded only if... what is the standard search directories? My final question is understanding when will LD_PRELOAD be ignored? Thank you for your help. Edit: When I exported the LD_PRELOAD to a shared library in /usr/lib/ like this: export LD_PRELOAD=shared-lib.so, I got rid of the above error, but I have no root privileges, so I'm not able to put any files under /usr/lib/, any suggestions about this? I think if I can manage to export the LD_PRELOAD without any slashes, it should work, but unless the shared library file is in /usr/lib/, LD_PRELOAD requires the full path. c linux share|improve this question edited Mar 26 '15 at 14:35 asked Mar 26 '15 at 7:46 user4016367 728 LD_PRELOAD follows the standard library search path. i.e. you can specify relative paths to
communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about http://askubuntu.com/questions/293649/proxychains-ld-preload-cannot-be-preloaded Stack Overflow the company Business Learn more about hiring developers or posting ads with us Ask Ubuntu Questions Tags Users Badges Unanswered Ask Question _ Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top proxychains cannot be LD_PRELOAD cannot be preloaded up vote 5 down vote favorite Using proxychains to do apt-get update in ubuntu 12.04.2 sudo proxychains apt-get update gives following error ERROR: ld.so: object 'libproxychains.so.3' from LD_PRELOAD cannot be preloaded: ignored. How can I avoid this error? 12.04 proxy libraries ld share|improve this question asked May 10 '13 at 18:48 Saeed 151127 I've found the solution, the execution file in /usr/bin/proxychains contains a link to cannot be preloaded LD_PRELOAD, which should not be libproxychains.so.3 but should be libproxychains.so. Of course, assuming you have /usr/lib/libproxychains.so correctly linking to /usr/lib/libproxychains.so.3 –Saeed May 11 '13 at 3:47 add a comment| 1 Answer 1 active oldest votes up vote 9 down vote You must change export LD_PRELOAD=libproxychains.so.3 to export LD_PRELOAD=/usr/lib/libproxychains.so.3 in /usr/bin/proxychains share|improve this answer answered Aug 29 '13 at 13:19 Huseyin 2751623 In peppermint 4.0, it should be /usr/lib/i386-linux-gnu/libproxychains.so.3 –diyism Dec 11 '13 at 7:25 2 "proxychains-ng" or proxychains4 have no problem like this. –diyism Dec 11 '13 at 9:28 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up using Facebook Sign up using Email and Password Post as a guest Name Email Post as a guest Name Email discard By posting your answer, you agree to the privacy policy and terms of service. Not the answer you're looking for? Browse other questions tagged 12.04 proxy libraries ld or ask your own question. asked 3 years ago viewed 10805 times active 3 years ago Blog Stack Overflow Podcast # 90 - Developer Stories, Charger Butts, and Joel's… Bye Bye, Bullets: The Stack Overflow Developer Story is the New Technical Resume Related 2Ubuntu preloaded laptops help3How to reset LD_PRELOAD3Cannot find -lgfortran0