Getting the command line of a running process in Linux is usually easy, just run the "ps -ef" command, but what if the command line used to start a process is very long? It gets a little more difficult. This is the problem I ran into recently when trying to get all the arguments used to start a WebLogic managed server. The ps command was only displaying the first 4096 characters of the command line.

The same 4096 character limit is present if you cat the /proc/<PID>/cmdline file for your process.


Luckily the JDK has a solution for us. The jinfo command can be used to extract the full command line (minus the executable path) for the JVM process...


Nice and easy!



-i