Loading shared object to specific processes in Linux

Question

I want to load a shared object to certain processes, there are certain conditions that are required

• loading to only specific processes and not all of them
• it has to be done before the process code starts executing
• the processes are not mine

What are the available ways to support this functionality on Linux?

Can it be accomplished with "/etc/ld.so.preload" or "LD_PRELOAD=/my/lib.so"? Is a kernel module needed for this?

Any help would be appreciated

Thanks!

Answer 1

The code you can use is something like:

LD_PRELOAD=/my/lib.so /path/to/binary

If this library is required for binary you can use also:

LD_LIBRARY_PATH=/my:$LD_LIBRARY_PATH /path/to/binary

and the binary will search for this library in path /my before searching in standard paths