Home Write to terminal after redirecting stdout to a file without using stderr?
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Write to terminal after redirecting stdout to a file without using stderr?

user1115
1#
user1115 Published in April 24, 2018, 6:36 am

I have two shell scripts, one that serves as the main "program" and another that serves as a "library."

In several places in the "program," I'll do something like: log "$thing" >> "$logfile", where log is a function defined in the "library."

# program.sh

logfile="log.txt"
stuff="hahah heheh hoho"

. library.sh 

for thing in $stuff; do
  log "$thing" >> "$logfile"
done

My question: Is there a way to redirect some of the output from the function back to the terminal without using stderr?

# library.sh

log () {

  # This gets written to the log
  echo "`date --rfc-3339=seconds`: $1"

  # How to write this to the terminal *without* using stderr?
  echo "Info: Message written to log." >&2

}

I want to avoid the use of stderr because in my actual program, there's an option to redirect errors to a file, but the messages I want to send to the terminal are informational, not errors, and should always show up on the terminal.

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