Pricess ID

Ruby
1

Hi,
if I start a process in Ruby using the system(“some process”)
how can I get the process id of the process I’ve just started?

Cheers.
Dan.

2

Fish Man wrote:

Hi,
if I start a process in Ruby using the system(“some process”)
how can I get the process id of the process I’ve just started?

Cheers.
Dan.

Dear Fish Man,
This is very simple.Just you can use Process.pid.
For instance,
I wll give some example,
I am having one file:
1.rb
system(“ps”) =>execute the process
p Process.pid =>it will tell the current process Id.

./1.rb
Next you can ruby this program.
You can see this output:
PID TTY TIME CMD
18662 pts/2 00:00:00 bash
18962 pts/2 00:00:00 ruby
18963 pts/2 00:00:00 ps
18962
You can combine the ruby process id and last one id is there.Both
are same.
This is way only we can take the process id.Other than that I don’t
know.

by
vellingiri.

3

On Oct 25, 2007, at 7:25 AM, Arul hari wrote:

For instance,
I wll give some example,
I am having one file:
1.rb
system(“ps”) =>execute the process
p Process.pid =>it will tell the current process Id.

But not the one launched by system.

You probably want to use something other than system – popen, fork/
exec, something like that