CODEWITHSUNDEEP
bashshellstdoutloggingstderr
Ed Hyer
Ed Hyer

Reputation: 1515

bash need STDOUT+STDERR in log, and STDERR to its normal destination

This is a cron job, and the output to STDERR results in an email notification of an error, which I need. However, the errors may be non-fatal, so I also need the STDERR output included in the log with STDOUT. How?

Upvotes: 1

Views: 296

Answers (2)

FourDollars
FourDollars

Reputation: 651

The following command works with less characters:

((./your-script 3>&1 1>&2 2>&3- | tee /dev/fd/2) 3>&1 1>&2 2>&3- ) | cat > logfile

Upvotes: 0

Celada
Celada

Reputation: 22261

OK, I spent a few minutes working out how to do this with just the standard shell command line.

Prepare yourself for a ridiculous command line.

((./your-script 3>&1 1>&2 2>&3 3>&- | tee /dev/fd/2) 3>&1 1>&2 2>&3 3>&- ) |
    cat >logfile

The only thing I can say about that abomination is that it works... and I can't find anything simpler that also works. Oh, and, it doesn't require bash or anything. It works in standard bourne shell.

I haven't got a clue why there has to be | cat near the end, but it doesn't work without it.

Upvotes: 1

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