Forum: Mongrel Mongrel crashes while running 'exec' through ruby.

Hi All,

I have a ruby on rails application and in the controller, I try to run a
shell script using exec command

like this

---
variable = 'sh /home/abc.sh'
exec variable
---

But when the control comes at this line, the mongrel server immediately
crashes, and when I check its status its says "missing pid file".

The shell script contains nothing wrong, it works fine on the linux
console, I have also commented everything in that shell script and put
just a single variable declaration, but even then the serer crashes..

Any Ideas, or is there any other way to run a shell script using ruby on
rails ??

Thanks in advance..

Tahir Rauf

On Thu, Jun 11, 2009 at 08:56, Tahir Rauf <lists@ruby-forum.com> wrote:

>
> Any Ideas, or is there any other way to run a shell script using ruby on
> rails ??
>

First of all, this is not a mongrel question at all, but a Ruby 
question, so
please don't follow up here.  But anyway:

#exec replaces the current process and never returns and is probably not
what you want to do in a controller.  Have a look at

http://apidock.com/ruby/Kernel/system

and

http://apidock.com/ruby/Kernel/%60

and

http://apidock.com/ruby/IO/popen/class

HTH,

/David

Got the solution, exec starts a new process so don't use it..

just use the shell command in ruby like this

`sh /home/abc.sh`


in the controller..


It runs fine