Mixlib::ShellOut

Provides a simplified interface to shelling out while still collecting both standard out and standard error and providing full control over environment, working directory, uid, gid, etc.

No means for passing input to the subprocess is provided.

Example

### Simple Shellout Invoke find(1) to search for .rb files:

ruby require 'mixlib/shellout' find = Mixlib::ShellOut.new("find . -name '*.rb'") find.run_command

If all went well, the results are on stdout

ruby puts find.stdout

find(1) prints diagnostic info to STDERR:

ruby puts "error messages" + find.stderr

Raise an exception if it didn’t exit with 0

ruby find.error!

Advanced Shellout

In addition to the command to run there are other options that can be set to change the shellout behavior. The complete list of options can be found here: https://github.com/chef/mixlib-shellout/blob/master/lib/mixlib/shellout.rb

Run a command as the www user with no extra ENV settings from /tmp with a 1s timeout

ruby cmd = Mixlib::ShellOut.new("apachectl", "start", :user => 'www', :env => nil, :cwd => '/tmp', :timeout => 1) cmd.run_command # etc.

STDIN Example

Invoke crontab to edit user cron:

ruby # :input only supports simple strings crontab_lines = [ "* * * * * /bin/true", "* * * * * touch /tmp/here" ] crontab = Mixlib::ShellOut.new("crontab -l -u #{@new_resource.user}", :input => crontab_lines.join("\n")) crontab.run_command

Windows Impersonation Example

Invoke “whoami.exe” to demonstrate running a command as another user:

ruby whoami = Mixlib::ShellOut.new("whoami.exe", :user => "username", :domain => "DOMAIN", :password => "password") whoami.run_command

Platform Support

Mixlib::ShellOut does a standard fork/exec on Unix, and uses the Win32 API on Windows. There is not currently support for JRuby.

Contributing

For information on contributing to this project see https://github.com/chef/chef/blob/master/CONTRIBUTING.md

License

License:: Apache License, Version 2.0

```text Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ```