Mongrel crashes while running 'exec' through ruby

Rails
1

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 R.

2

On Jun 11, 7:54 am, Tahir R. [email protected]
wrote:

Hi All,

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

You know that the whole point of the exec command is that it replaces
the current process with what you tell it to run? You may be more
interested in ``, system or things like IO.popen

Fred

3

Frederick C. wrote:

On Jun 11, 7:54�am, Tahir R. [email protected]
wrote:

Hi All,

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

You know that the whole point of the exec command is that it replaces
the current process with what you tell it to run? You may be more
interested in ``, system or things like IO.popen

Fred

Thanks Fred, As far as i know system is for windows, and Currently my
application is deployed on linux.

Can you tell me more about IO.popen ?

I just need to run a script and want the control back to the same
process…

4

On Jun 11, 8:31 am, Tahir R. [email protected]
wrote:

interested in ``, system or things like IO.popen

Fred

Thanks Fred, As far as i know system is for windows, and Currently my
application is deployed on linux.

That’s not true

Can you tell me more about IO.popen ?

http://www.ruby-doc.org/core/classes/IO.html#M002267

Fred

5

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

Thanks Every body