Catching command-line errors using %x

Question

Whenever you want to execute something on the command line, you can use the following syntax:

%x(command to run)

However, I want to catch a

Answer 1

You need a mix of @Cam 's answer and @tonttu 's answer.

decent explanation of $? and others.

Edit: the domain http://blog.purifyapp.com is now in hands of a domain-squatter and scammer.

result = %x(command to run 2>&1)

unless $? == 0 #check if the child process exited cleanly.
    puts "got error #{result}"
end