Process id

ruby-talk
1

Hi everybody I m nobie of ruby

I need some hint about to catch a id of a certain process

for instance if I run this line of code

`ruby file.rb` there is a possibility to have the id of this process
(file.rb process)

my problem if the file.rb was lock I need the pId for kill it

Thanks to all

Best Regards

joksy

···

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Posted via http://www.ruby-forum.com/.

2

You can see the process id by putting this as the first line:
print "#{Process.pid}\n"

Alternatively you seem to be using a *nix computer so you can find the
process with ps:
ps -ef | grep ruby

- Byron

···

On Jun 16, 12:13 pm, Gianni Dupro <tetta...@lu.unisi.ch> wrote:

Hi everybody I m nobie of ruby

I need some hint about to catch a id of a certain process

for instance if I run this line of code

`ruby file.rb` there is a possibility to have the id of this process
(file.rb process)

my problem if the file.rb was lock I need the pId for kill it

-----
http://www.saltylabs.com/

3

A quick look at Kernel#` in the Ruby documentation (http://www.ruby-
doc.org/core/) mentions a special (Perl-esque) variable $? which can
be used after calling a system command with ``:

bash-2.05a$ irb.bat
irb(main):001:0> `echo "hi"`
=> "\"hi\"\n"
irb(main):002:0> $?.pid
=> 3124

And as you can see that variable happens to have a #pid method. Does
anyone know if there is a better way without using the esoteric $?
variable?

-James

···

On Jun 16, 9:13 am, Gianni Dupro <tetta...@lu.unisi.ch> wrote:

Hi everybody I m nobie of ruby

I need some hint about to catch a id of a certain process

for instance if I run this line of code

`ruby file.rb` there is a possibility to have the id of this process
(file.rb process)

my problem if the file.rb was lock I need the pId for kill it

Thanks to all

Best Regards

joksy

--
Posted viahttp://www.ruby-forum.com/.

4

byronsalty wrote:

Hi everybody I m nobie of ruby

I need some hint about to catch a id of a certain process

for instance if I run this line of code

`ruby file.rb` there is a possibility to have the id of this process
(file.rb process)

my problem if the file.rb was lock I need the pId for kill it

You can see the process id by putting this as the first line:
print "#{Process.pid}\n"

Alternatively you seem to be using a *nix computer so you can find the
process with ps:
ps -ef | grep ruby

- Byron

Thanks a lot for the help to use some unix command like ps.

I do something easier

exec("ruby a.rb | ps 1>logFile")

and next grep the file for a ruby process.

And now born another problem if

I running directly with ruby like name$ ruby file.rb and in the file I
have the information but move it into a rails files doesn t work.

Any suggest??

thanks to all have a nice day

Joksy

···

On Jun 16, 12:13 pm, Gianni Dupro <tetta...@lu.unisi.ch> wrote:

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