sed works fine from interactive shell but not from script

Craig

3/1/23, 8:16 PM

Trying to enable/disable xdebug on my php-fpm docker container.

If I start an interactive shell using docker exec my_container bash then run:

sed -i 's/^#zend_extension/zend_extension/' /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini

sed -i 's/^zend_extension/#zend_extension/' /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini

The file /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini has the # added and removed as expected. However my script to do the same:

docker exec my_container bash -c "sed -i 's/^#zend_extension/zend_extension/' /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini"

Then nothing happens. I'm not using shell variables to there's no variable expansion issues as far as I'm aware.

Up til now my script has been:

docker exec -it my_container bash -c "cp /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini /tmp/xdebug.ini; sed -i 's/^#zend_extension/zend_extension/' /tmp/xdebug.ini; cp /tmp/xdebug.ini /usr/local/etc/php/conf.d/docker-php-ext-xdebug.ini"

But I would like to get to the bottom of it. It's driving me nuts.

Note: Anywhere I say docker exec my_container the my_container is actually a couple of commands in backticks to get the correct container, I just say my_container to make it more clear.

Any ideas?

0 + 0

bash

command-line-interface

sed

docker

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: sed works fine from interactive shell but not from script

TH: sed ทำงานได้ดีจากเชลล์แบบโต้ตอบ แต่ไม่ใช่จากสคริปต์

RO: sed funcționează bine din shell interactiv, dar nu din script

RU: sed отлично работает из интерактивной оболочки, но не из скрипта

VI: sed hoạt động tốt từ trình bao tương tác nhưng không hoạt động từ tập lệnh

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