$LIB variable does not expand to anything in Ubuntu Server 18.10












0














I have the same exact problem as this question previously posted, where /etc/ld.so.preload does not intercept the right architecture. A little background: I have compiled a shared object (64-bit) that is referenced in the ld.so.preload file on any binary execution. The problem was that I was getting a ERROR: ld.so: object '/usr/local/lib/libprocesshider.so' from /etc/ld.so.preload cannot be preloaded (wrong ELF class: ELFCLASS64): ignored. when executing 32-bit programs.



To fix the issue according to the answer in that question, I had to make two directories (lib/i386-linux-gnu and x86_64-linux-gnu, for example, in /var/opt) and specify /var/opt/$LIB/mysharedobject.so in /etc/ld.so.preload so the right library will be preloaded depending in program architecture.



So in that case, in Debian based systems, /var/opt/$LIB/mysharedobject.so would expand to:





  • /var/opt/lib/i386-linux-gnu/mysharedobject.so for 32-bit programs;


  • /var/opt/x86_64-linux-gnu/mysharedobject.so for 64-bit programs.


However, after applying this, any binary I run (such as ls) will output the following 'error':
ERROR: ld.so: object '/var/opt/$LIB/chainsaw.so' from /etc/ld.so.preload cannot be preloaded (cannot open shared object file): ignored.



As you can see, $LIB did not expand to anything. I have also set $LD_LIBRARY_PATH to /var/opt and ran ldconfig to update the system with this libs, but with no success. What is the problem here?










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    0














    I have the same exact problem as this question previously posted, where /etc/ld.so.preload does not intercept the right architecture. A little background: I have compiled a shared object (64-bit) that is referenced in the ld.so.preload file on any binary execution. The problem was that I was getting a ERROR: ld.so: object '/usr/local/lib/libprocesshider.so' from /etc/ld.so.preload cannot be preloaded (wrong ELF class: ELFCLASS64): ignored. when executing 32-bit programs.



    To fix the issue according to the answer in that question, I had to make two directories (lib/i386-linux-gnu and x86_64-linux-gnu, for example, in /var/opt) and specify /var/opt/$LIB/mysharedobject.so in /etc/ld.so.preload so the right library will be preloaded depending in program architecture.



    So in that case, in Debian based systems, /var/opt/$LIB/mysharedobject.so would expand to:





    • /var/opt/lib/i386-linux-gnu/mysharedobject.so for 32-bit programs;


    • /var/opt/x86_64-linux-gnu/mysharedobject.so for 64-bit programs.


    However, after applying this, any binary I run (such as ls) will output the following 'error':
    ERROR: ld.so: object '/var/opt/$LIB/chainsaw.so' from /etc/ld.so.preload cannot be preloaded (cannot open shared object file): ignored.



    As you can see, $LIB did not expand to anything. I have also set $LD_LIBRARY_PATH to /var/opt and ran ldconfig to update the system with this libs, but with no success. What is the problem here?










    share|improve this question

























      0












      0








      0







      I have the same exact problem as this question previously posted, where /etc/ld.so.preload does not intercept the right architecture. A little background: I have compiled a shared object (64-bit) that is referenced in the ld.so.preload file on any binary execution. The problem was that I was getting a ERROR: ld.so: object '/usr/local/lib/libprocesshider.so' from /etc/ld.so.preload cannot be preloaded (wrong ELF class: ELFCLASS64): ignored. when executing 32-bit programs.



      To fix the issue according to the answer in that question, I had to make two directories (lib/i386-linux-gnu and x86_64-linux-gnu, for example, in /var/opt) and specify /var/opt/$LIB/mysharedobject.so in /etc/ld.so.preload so the right library will be preloaded depending in program architecture.



      So in that case, in Debian based systems, /var/opt/$LIB/mysharedobject.so would expand to:





      • /var/opt/lib/i386-linux-gnu/mysharedobject.so for 32-bit programs;


      • /var/opt/x86_64-linux-gnu/mysharedobject.so for 64-bit programs.


      However, after applying this, any binary I run (such as ls) will output the following 'error':
      ERROR: ld.so: object '/var/opt/$LIB/chainsaw.so' from /etc/ld.so.preload cannot be preloaded (cannot open shared object file): ignored.



      As you can see, $LIB did not expand to anything. I have also set $LD_LIBRARY_PATH to /var/opt and ran ldconfig to update the system with this libs, but with no success. What is the problem here?










      share|improve this question













      I have the same exact problem as this question previously posted, where /etc/ld.so.preload does not intercept the right architecture. A little background: I have compiled a shared object (64-bit) that is referenced in the ld.so.preload file on any binary execution. The problem was that I was getting a ERROR: ld.so: object '/usr/local/lib/libprocesshider.so' from /etc/ld.so.preload cannot be preloaded (wrong ELF class: ELFCLASS64): ignored. when executing 32-bit programs.



      To fix the issue according to the answer in that question, I had to make two directories (lib/i386-linux-gnu and x86_64-linux-gnu, for example, in /var/opt) and specify /var/opt/$LIB/mysharedobject.so in /etc/ld.so.preload so the right library will be preloaded depending in program architecture.



      So in that case, in Debian based systems, /var/opt/$LIB/mysharedobject.so would expand to:





      • /var/opt/lib/i386-linux-gnu/mysharedobject.so for 32-bit programs;


      • /var/opt/x86_64-linux-gnu/mysharedobject.so for 64-bit programs.


      However, after applying this, any binary I run (such as ls) will output the following 'error':
      ERROR: ld.so: object '/var/opt/$LIB/chainsaw.so' from /etc/ld.so.preload cannot be preloaded (cannot open shared object file): ignored.



      As you can see, $LIB did not expand to anything. I have also set $LD_LIBRARY_PATH to /var/opt and ran ldconfig to update the system with this libs, but with no success. What is the problem here?







      debian dynamic-linking elf dynamic-loading






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