That gives me info on MY executing program. I need info on a different program.
To be specific, this is part of a script to monitor Oracle databases. Oracle can be installed multiple times on a server in multiple ORACLE_HOMEs. Each home can have zero or more running instances. I am trying to match the instances with the homes. Using the ps system call combined with grep I can find the PIDs of all the running instances. However, the cmd listed is just the basename, not the full path. WHICH doesn't help, since that just tells me the first exe resolved based on my PATH environment variable, not the particular copy that is executing. On Linux, the full path of executing processes are softlinked under /proc/$PID/exe. However, only the process owner and root can resolve the target of that link. I can sudo readlink (as in my script), but to do it in a shell script is ugly and/or AWKward. I would prefer to do it in perl, but I don't know how to sudo the readlink() function call.