Grep and set -o errexit

问题

I have a simple bash-script. It finds a string in the file.

#/bin/bash

set -o errexit

grep 'findedstring' $file.
echo "was founded string on file"

<...>

If the string was found in the file the script was successfully executed and I can see "was founded string on file" in the output . But if the file doesn't have 'findedstring' then the script exits and didn't work further, so I don't see "was founded string on file" in the output If I will try to delete the following string in my script

'set -o errexit'

then the script will work further and I can see string "was founded string on file" in the output.

How can I save the string in script

'set -o errexit'

and my script will keep working when the string is not founded in the file?

Help me, please.

回答1:

grep 'findedstring' $file. || true

回答2:

#/bin/bash

set -o errexit

[[ $(grep 'findedstring' "$file") ]] && echo "found string on file"

echo "I will be reached even if grep fails"

来源：https://stackoverflow.com/questions/29935388/grep-and-set-o-errexit