Run 32bit app on 64bit kernel ont as root

[sluge]

Hello
I use tool hpacu-a RAID configuration utility by HP, it is 32-bit application and I use it on 64-bit system by copying 32-bit libraries to /lib and /usr/lib directories.

But now I'm working on specific system where /lib and /usr folders are read-only filesystems, they are mounted from image files, and it's impossible to copy anything to them.

I can copy only files only to /etc and /tmp folders. So, I copyed hpacu application and 32-bit libraries to my /tmp folder, type

export LD_LIBRARY_PATH=/tmp

and tryed to launch my utility but failed with error:

/lib/ld-linux.so.2: bad ELF interpreter: No such file or directory

Is any posibility for me to launch this utility?

[Gareth Jones]

/lib/ld-linux.so.2 is the 32-bit ELF-interpreter/dynamic-linker (like /lib64/ld-linux-x86-64.so.2 for 64-bit programs). Its location is hard-coded into the executable at compile-time, and LD_LIBRARY_PATH won't affect that. (ld-linux.so is actually what uses LD_LIBRARY_PATH to find the other libraries.)

How much access do you have to this machine? If /lib cannot be modified, you may be able to use "mount --bind" and/or chroot tricks. Or you could try executing the ELF-interpreter directly: "/tmp/ld-linux.so.2 /full/path/to/your/executable [ARGS]" (with LD_LIBRARY_PATH set of course).