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#Run unix commands in ruby runner full#
Which one you pick will be based on what you want to occur, full control changed to the Bash command, check of the command success, etc. There are several different ways to run a bash script or command in Ruby. The PuTTYPuTTYPuTTY question in the PuTTY FAQ addresses this.Whenever we talk about Ruby and System Administration, its only a matter of time before Bash is mentioned.
#Run unix commands in ruby runner code#
The above code snippet, however, will yield two identical lines. If done on an interactive shell, the output you'd receive for the first pwd would (depending on how your system is setup) be different than the output of the second pwd. Gotcha: Successive calls to exec() echo $ssh->exec( 'pwd') // outputs /home/usernameĮcho $ssh->exec( 'pwd') // (despite the previous command) outputs /home/username if the callback method returns bool(true) then exec() will return early. The commented out code shows how you could use a callback method to return early based on whatever your criteria might be. Run it via the webbrowser and you may need to flush the output buffer and even then YMMV. To see whether or not "quiet mode" is enabled do $ssh->isQuietModeEnabled(). To get the exit status you can call $ssh->getExitStatus(). when a PTY is enabled) for reasons described here.
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These functions do not work with $ssh->read() (ie. To get stderr separately from stdout you'll need to call $ssh->enableQuietMode() and then call $ssh->getStdError(). To re-enable it call $ssh->disableQuietMode(). To suppress stderr you can call $ssh->enableQuietMode(). One-off commands echo $ssh->exec( 'pwd') īy default $ssh->exec() returns both stdout and stderr.