6 Sep
2008
6 Sep
'08
12:57 a.m.
On Fri, Sep 5, 2008 at 11:14 AM, Hal Duston [email protected] wrote:
A process can change the arguments at any time w/o doing an exec. I have actually read the code that is needed to do this under Linux. It is less than 15 lines. All it does is rebuild the environment which is where the exec'ed command line arguments are kept. Once they are rebuilt ps, top, and everything else just pick them up from /proc/<pid>/cmdline.
Wow. I had no idea. Here I thought ps got that info from an internal kernel data structure that wasn't manipulable by userland. That suggests some really ugly possibilities.