Does each process in a session get its input from and send its output to the terminal the session is connected to?

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This tutorial says the following:




Every session is tied to a terminal from which processes in the
session get their input and to which they send their output.




I think that this statement is incorrect, because say that I opened some program from the terminal (this program/process will be in the session connected to the terminal) and I redirected this program's stdout to a file. Now the program is not sending its output to the terminal.



Am I correct?







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    up vote
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    down vote

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    This tutorial says the following:




    Every session is tied to a terminal from which processes in the
    session get their input and to which they send their output.




    I think that this statement is incorrect, because say that I opened some program from the terminal (this program/process will be in the session connected to the terminal) and I redirected this program's stdout to a file. Now the program is not sending its output to the terminal.



    Am I correct?







    share|improve this question
























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      This tutorial says the following:




      Every session is tied to a terminal from which processes in the
      session get their input and to which they send their output.




      I think that this statement is incorrect, because say that I opened some program from the terminal (this program/process will be in the session connected to the terminal) and I redirected this program's stdout to a file. Now the program is not sending its output to the terminal.



      Am I correct?







      share|improve this question














      This tutorial says the following:




      Every session is tied to a terminal from which processes in the
      session get their input and to which they send their output.




      I think that this statement is incorrect, because say that I opened some program from the terminal (this program/process will be in the session connected to the terminal) and I redirected this program's stdout to a file. Now the program is not sending its output to the terminal.



      Am I correct?









      share|improve this question













      share|improve this question




      share|improve this question








      edited Nov 11 '17 at 19:52









      Gilles

      507k12010031532




      507k12010031532










      asked Nov 11 '17 at 19:32









      user7681202

      237414




      237414




















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          The statement correctly describes the nominal case: open a terminal, run a shell in its own session in this terminal, and run further programs from the shell. You are correct that the statement is not true in general: any process can send output and receive input from anywhere, not just the session's controlling terminal. Shell redirections are the most common way to make a process's standard input or output be something other than the terminal.



          Don't expect a tutorial to cover all the cases. If it did, it would be incomprehensible.






          share|improve this answer




















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            1 Answer
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            active

            oldest

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            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes








            up vote
            0
            down vote



            accepted










            The statement correctly describes the nominal case: open a terminal, run a shell in its own session in this terminal, and run further programs from the shell. You are correct that the statement is not true in general: any process can send output and receive input from anywhere, not just the session's controlling terminal. Shell redirections are the most common way to make a process's standard input or output be something other than the terminal.



            Don't expect a tutorial to cover all the cases. If it did, it would be incomprehensible.






            share|improve this answer
























              up vote
              0
              down vote



              accepted










              The statement correctly describes the nominal case: open a terminal, run a shell in its own session in this terminal, and run further programs from the shell. You are correct that the statement is not true in general: any process can send output and receive input from anywhere, not just the session's controlling terminal. Shell redirections are the most common way to make a process's standard input or output be something other than the terminal.



              Don't expect a tutorial to cover all the cases. If it did, it would be incomprehensible.






              share|improve this answer






















                up vote
                0
                down vote



                accepted







                up vote
                0
                down vote



                accepted






                The statement correctly describes the nominal case: open a terminal, run a shell in its own session in this terminal, and run further programs from the shell. You are correct that the statement is not true in general: any process can send output and receive input from anywhere, not just the session's controlling terminal. Shell redirections are the most common way to make a process's standard input or output be something other than the terminal.



                Don't expect a tutorial to cover all the cases. If it did, it would be incomprehensible.






                share|improve this answer












                The statement correctly describes the nominal case: open a terminal, run a shell in its own session in this terminal, and run further programs from the shell. You are correct that the statement is not true in general: any process can send output and receive input from anywhere, not just the session's controlling terminal. Shell redirections are the most common way to make a process's standard input or output be something other than the terminal.



                Don't expect a tutorial to cover all the cases. If it did, it would be incomprehensible.







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 11 '17 at 19:52









                Gilles

                507k12010031532




                507k12010031532



























                     

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