How can an external command return both its output and its exit status to Ruby?
This is a follow up question regarding ruby system command check exit code. I want to run command such that to get its output as well as exit code. Currently what I used in the code is:
rv = `#{cmd} 2>&1`
But this only captures output, and
rv = system(cmd)
only captures the exit code. How to achieve both?
Check $?.exitstatus for the exit code.
For more info, see http://www.ruby-doc.org/core-2.1.0/Process/Status.html
Backticks will capture the output from your command. For example, to store the output in the rv variable:
rv = `echo Error: EX_USAGE; exit 64`
#=> "Error: EX_USAGEn"
You can interrogate the exit status of the process from the built-in $? variable or from a Process::Status object. For example, to get the exit status of the last backtick command:
$?.exitstatus
#=> 64
$? accesses the status of the last system executed command if you use the backticks, system() or %{}. You can then access the exitstatus and pid properties.
Source
So you can do rv = system(cmd) , and do status = $?.exitstatus .