How to get the command line args passed to a running process on unix/linux systems?

Question

On SunOS there is pargs command that prints the command line arguments passed to the running process.

Is there is any similar command on other Unix env

Answer 1

This will do the trick:

xargs -0 < /proc//cmdline

Without the xargs, there will be no spaces between the arguments, because they have been converted to NULs.