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Ruby system error code

このコード例では、 system( ) の rerurn 値 は 常に true か falseになる。. error " ruby - e ' exit 0' ", # success " ruby - e ' exit 1' ", # error " ruby - e ' exit 2' ", # error " ruby - e ' 100. times{ puts \ " 1\ " ;. More information here: Forming sanitary shell commands or system calls in Ruby · share| improve. Trouble is, it returns the exit code instead of the output, and capturing the latter is convoluted and messy. The best answer in. So this doesn' t directly answer your question ( won' t capture the command' s output). But instead of trying begin / rescue, you can just check the exit code ( $? ) of the command: % x( command to run) unless $? system returns true if the command gives zero exit status, false for non.

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    System ruby error

    the command has an non- zero exit code, or nil if there is no command. 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. From the documentation: system returns true if the command gives zero exit status, false for non zero exit status. Returns nil if command execution fails. system( " unknown command" ) # = > nil system( " echo foo" ) # = > true. tl; dr If you want to run a shell command from Ruby and capture its stdout, stderr and return status, check out the. exits from ruby, then runs the command system ( ' echo', ' hello world' ) # returns the status code sh( ' echo', ' hello. Ruby: systemで終了ステータスをチェックして例外を投げる · Ruby. よく使うのでメモ。 def _ system cmd $ stdout.

    puts " command= # { cmd} " system cmd status = $? # Process: : Status if not status. raise " abnormal exit status.