Question

I have a shell command, that I run from ruby:

 cat_command = "cat 0.mpg 7.mpg 15.mpg 8.mpg 1.mpg > intermed.mpg"  

 %x[cd #{my_dir} && #{cat_command}]

It returns

cat: 8.mpg: No such file or directory

How do I catch this response (for rescuing/ error handling). In ruby?

Answer 1

actually figured it out..

 stderr = Open3.popen3("cat 0.mpg 7.mpg 15.mpg 8.mpg 1.mpg > intermed.mpg" )
 stderr[2].gets
  => "cat: 0.mpg: No such file or directory\n"