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?
shell terminal session
edited Nov 11 '17 at 19:52
Gilles
507k12010031532
asked Nov 11 '17 at 19:32
user7681202
237414
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up vote
0
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?
shell terminal session
edited Nov 11 '17 at 19:52
Gilles
507k12010031532
asked Nov 11 '17 at 19:32
user7681202
237414
add a comment |Â
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?
shell terminal session
edited Nov 11 '17 at 19:52
Gilles
507k12010031532
asked Nov 11 '17 at 19:32
user7681202
237414
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?
shell terminal session
edited Nov 11 '17 at 19:52
Gilles
507k12010031532
asked Nov 11 '17 at 19:32
user7681202
237414
edited Nov 11 '17 at 19:52
Gilles
507k12010031532
edited Nov 11 '17 at 19:52
Gilles
507k12010031532
edited Nov 11 '17 at 19:52
Gilles
507k12010031532
507k12010031532
asked Nov 11 '17 at 19:32
user7681202
237414
asked Nov 11 '17 at 19:32
user7681202
237414
asked Nov 11 '17 at 19:32
user7681202
237414
237414
add a comment |Â
add a comment |Â
1 Answer
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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.
answered Nov 11 '17 at 19:52
Gilles
507k12010031532
add a comment |Â
1 Answer
1
active
oldest
votes
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.
answered Nov 11 '17 at 19:52
Gilles
507k12010031532
add a comment |Â
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.
answered Nov 11 '17 at 19:52
Gilles
507k12010031532
add a comment |Â
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.
answered Nov 11 '17 at 19:52
Gilles
507k12010031532
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.
answered Nov 11 '17 at 19:52
Gilles
507k12010031532
answered Nov 11 '17 at 19:52
Gilles
507k12010031532
answered Nov 11 '17 at 19:52
Gilles
507k12010031532
answered Nov 11 '17 at 19:52
Gilles
507k12010031532
507k12010031532
add a comment |Â
add a comment |Â
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