LinuxQuestions.org - [SOLVED] Bash stdout redirection

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Bash stdout redirection

I have code in a bash shell which writes to stdout as it runs.
This is a contrived example ...

Code:

echo

echo "Program <ProgName> started."

echo

echo "Entering process stage 2."

{Many lines of code}

echo "Interim results pass the sanity test."

echo

{Many lines of code}

echo

echo "Entering process stage 3."

{Many lines of code}

echo "Everything looks good so far."

echo

echo "The finished product is ..."

{Many lines of code}

echo

echo "Program <ProgName> ended."

exit

I'd like to redirect most of stdout to a Journal file.
How is this done?

Maybe something like this ...

Code:

echo

echo "Program <ProgName> started."

echo

From now on, until further notice,

  all stdout should be written to file ABC.

echo "Entering process stage 2."

{Many lines of code}

echo "Interim results pass the sanity test."

echo

{Many lines of code}

echo

echo "Entering process stage 3."

{Many lines of code}

echo "Everything looks good so far."

echo

From now on, until further notice,

  all stdout should be written to file XYZ.

echo "The finished product is ..."

{Many lines of code}

From now on, until further notice,

  all stdout should be written to the screen (as usual).

echo

echo "Program <ProgName> ended."

exit

Daniel B. Martin

One way to do it:

Code:

echo "This goes to stdout"

(

echo "But,"

echo "These go to a file"

) > /tmp/somefile

echo "And this to stdout again"

Quote:

Originally Posted by Guttorm (Post 5478627)

Code:

echo "This goes to stdout"

(

echo "But,"

echo "These go to a file"

) > /tmp/somefile

echo "And this to stdout again"

This surely works but requires a whole lot of code changes. I'm hoping to find a way to insert those three From now on commands, if such things exist.

Daniel B. Martin

I would use the exec option from the link above as well :) The nice part is you can put all the execs in the same piece of code and then use them when required.
On the other side of the fence, the original suggestion is actually a lot less typing and you could just use variables for the 3 file names.

Also, commonly, "informational" messages are written to STDERR while "output" goes to STDOUT. By default both are directed to the terminal screen.

Quote:

Originally Posted by Guttorm (Post 5478638)

Here is something to try:

http://unix.stackexchange.com/questi...rest-of-script

Thank you, Guttorm. This worked nicely. SOLVED!

Daniel B. Martin