CODEWITHSUNDEEP
linuxbash
jcalfee314
jcalfee314

Reputation: 4830

hide commands from xtrace

Is there a way to hide a command from the output with xtrace on (set -o xtrace)?

In DOS, the technique is to turn echo on but prefix the hidden commands with the @ symbol.

Upvotes: 3

Views: 894

Answers (2)

William
William

Reputation: 4935

You could do something like this

# At start of script, or where xtrace may be enabled:
[[ "$SHELLOPTS" =~ xtrace ]] && xtrace_on=1

# Later
set +o xtrace
# Your untraced code here
[[ "$xtrace_on" ]] && set -o xtrace

Upvotes: 0

that other guy
that other guy

Reputation: 123490

I've never seen a similar trick in bash, but you can sometimes use subshells to temporarily enable tracing for commands you're interested in:

echo "This command is not traced"
(
  set -x
  echo "This command is traced"
)
echo "No longer traced"

If subshells are not suitable because you want to modify the environment, you can set -x and then set +x, but that leaves you with the artifacts of tracing set +x commands.

Upvotes: 5

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