making a command interpreter

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i am making a command line interpreter for an os course. the preoblem statement says that i have to log the output of every command i type in this interpreter along with the usual display in the stdout.

how do i do this?
i have used dup2 to redirect the output to the log file, but then i cannot get the output on the screen.

also i dont want to execute the command twice so that i can output to the stdout once and next time to the file. this is because outputs of some commands(eg. ps) do not remain same..

PLZ help as quickly as possible..

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binary_boy

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Sep 8th, 2010

Re: making a command interpreter

Assuming you need to do it all manually, how about redirecting output to a temporary file? Then you can echo the temporary file to the screen as well as append it to your log file.

Narue

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Re: making a command interpreter

Click to Expand / Collapse Quote originally posted by Narue ...

Assuming you need to do it all manually, how about redirecting output to a temporary file? Then you can echo the temporary file to the screen as well as append it to your log file.

yes..thats a good idea...thankss a lot...if you get anything better plz let me know.

binary_boy

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