Determine if `set -e` flag if is active in bash

Question

In a bash script/shell, is there a programmatic way to determine if the set -e flag is active?

I just need a boolean letting me know if it\'s on/off.

Answer 1

You can check the $- variable to see whether the e option is enabled:

[[ $- =~ e ]]

From help set:

The current set of flags may be found in $-.

Answer 2

From help test:

    -o OPTION      True if the shell option OPTION is enabled.

Thus:

[ -o errexit ]

Answer 3

You can also use the exit code of shopt:

if shopt -qo errexit; then 
    echo enabled
    # do something
fi

Answer 4

$ set -e
$ if grep -q 'errexit' <<<"$SHELLOPTS";then echo "set -e is enabled";else echo "set -e is disabled";fi
set -e is enabled
$ set +e
$ if grep -q 'errexit' <<<"$SHELLOPTS";then echo "set -e is enabled";else echo "set -e is disabled";fi
set -e is disabled