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POProgramatically determine shared libraries in use by running application
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  1. POProgramatically determine shared libraries in use by running application
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    copied!<p>Is it possible to (and, if so, how does one) determine the shared libraries of an application that are used by an application <em>at runtime</em>? Basically, can I programmatically obtain the the output of <code>ldd</code>? Preferred C/C++ solution does not just jump to execute ldd on the command-line.</p> <p>Consider the following: I have a driver application that calls <code>doAction()</code> from a shared library <code>libfoo</code>. I compile the application once and then set <code>LD_LIBRARY_PATH</code> to an appropriate directory containing a <code>libfoo</code> with the <code>doAction()</code> symbol defined. This way, I can have multiple implementations of <code>doAction()</code> in different <code>libfoo</code>s but only ever compile an application once.</p> <p>A real world example would be a professor having a class of students implement <code>doAction()</code>. Instead of compiling a test harness against each student's implementation of <code>doAction()</code>, the students submit a shared library and the professor can simply change <code>LD_LIBRARY_PATH</code> to evaluate each student.</p> <p>My goal in obtaining the library currently being used is to perform an <code>md5sum</code> on the library at runtime to ensure I'm calling the correct library. In the contrived example, all students would submit the <code>md5sum</code> of their library and the professor could match the running executable + shared library (database lookup, log to file, ...) to the student, to prevent an accident in setting <code>LD_LIBRARY_PATH</code> effecting another student's grade (forgot to change <code>LD_LIBRARY_PATH</code> to David's directory and ran again with Bill's <code>libfoo</code>).</p>
 

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