On Thu, 11 Mar 2004, Kwan Lowe wrote:
>
> > That worked nicely, however, winex doesn't have a parent process :(
> > I wonder what I/O it's hooked to? Andrew M. Hoerter mentioned possibly some
> > sort of I/O. Now I'm thinking it's attached to a device driver or hardware.
> >
> > What's PPID and how do I get to it?
>
> The PPID is the Parent Process ID. On a 'ps -f' listing, it's the third field:
>
> UID PID PPID C STIME TTY TIME CMD
> kwan 16374 16372 0 10:50 pts/4 00:00:00 bash
> kwan 16584 16374 0 12:14 pts/4 00:00:00 ps -f
>
> The above shows that process 16584 was started by PPID 16374, which is bash.
>
> If you did a 'ps -ef', it would show that bash was started by an xterm, which
> in turn was started by the window manager:
>
> kwan 12988 1077 0 Mar09 ? 00:00:01 /usr/X11R6/bin/fluxbox
> kwan 14363 12988 0 Mar10 ? 00:00:01 xterm
> kwan 14365 14363 0 Mar10 pts/2 00:00:00 bash
If you do "ps -axfww | less -S", it'll show you graphically who started
whom. Apparently "f" means "ASCII-art process hierarchy (forest)" in this
case. I don't know what makes it different.
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