How pipe/redirect influences the execution of the script which output is to be piped/redirected?

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I stumbled on the example of something I wasn't aware to be possible, that the mere fact of putting | or > after the script, can influence of how it will run. Details of how I realized it can be read here: https://stackoverflow.com/questions/53027036/why-piping-output-of-docker-compose-exec-to-grep-breaks-it - there is a docker related question, and here I would like to ask the more general one - how is this even possible on Linux? What pipe/redirection at the end of the script changes in the environment in which the script runs?






pipe io-redirection






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    I stumbled on the example of something I wasn't aware to be possible, that the mere fact of putting | or > after the script, can influence of how it will run. Details of how I realized it can be read here: https://stackoverflow.com/questions/53027036/why-piping-output-of-docker-compose-exec-to-grep-breaks-it - there is a docker related question, and here I would like to ask the more general one - how is this even possible on Linux? What pipe/redirection at the end of the script changes in the environment in which the script runs?






    pipe io-redirection






    share























      up vote
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      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I stumbled on the example of something I wasn't aware to be possible, that the mere fact of putting | or > after the script, can influence of how it will run. Details of how I realized it can be read here: https://stackoverflow.com/questions/53027036/why-piping-output-of-docker-compose-exec-to-grep-breaks-it - there is a docker related question, and here I would like to ask the more general one - how is this even possible on Linux? What pipe/redirection at the end of the script changes in the environment in which the script runs?






      pipe io-redirection






      share













      I stumbled on the example of something I wasn't aware to be possible, that the mere fact of putting | or > after the script, can influence of how it will run. Details of how I realized it can be read here: https://stackoverflow.com/questions/53027036/why-piping-output-of-docker-compose-exec-to-grep-breaks-it - there is a docker related question, and here I would like to ask the more general one - how is this even possible on Linux? What pipe/redirection at the end of the script changes in the environment in which the script runs?






      pipe io-redirection




      pipe io-redirection





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      Łukasz Zaroda

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