How not to terminate after carried out commands in bash

Question

After carrying out commands with "-c" option of bash, how can I make the terminal wait for input while preserving the environment?

Like CMD /K *** or pwsh -NoExit -Command ***.

Answer 1

From a comment by Cyrus:

You can achieve something similar by abusing the --rcfile option:

bash --rcfile <(echo "export PS1='> ' && ls")

From bash manpage:

--rcfile file

Execute commands from file instead of the system wide initialization file /etc/bash.bashrc and the standard personal initialization file ~/.bashrc if the shell is interactive

This is the answer I was looking for. Thank you!!

As an example of use, I use the following method to use the latest docker image with my preferred repository without building the image:

# Call bash in the container from bash
docker run --rm -it ubuntu:22.04 bash -c "bash --rcfile <(echo 'sed -i -E '\''s%^(deb(-src|)\s+)https?://(archive|security)\.ubuntu\.com/ubuntu/%\1http://mirrors.xtom.com/ubuntu/%'\'' /etc/apt/sources.list && apt update && FooBar=`date -uIs`')"

# ... from pwsh
docker run --rm -it ubuntu:22.04 bash -c "bash --rcfile <(echo 'sed -i -E '\''s%^(deb(-src|)\s+)https?://(archive|security)\.ubuntu\.com/ubuntu/%\1http://mirrors.xtom.com/ubuntu/%'\'' /etc/apt/sources.list && apt update && FooBar=``date -uIs``')"

---

# Call dash (BusyBox ash) in the container from bash
docker run --rm -it alpine:latest ash -c "ash -c 'export ENV=\$1;ash' -s <(echo 'sed -i -E '\''s%^https?://dl-cdn\.alpinelinux\.org/alpine/%https://ftp.udx.icscoe.jp/Linux/alpine/%'\'' /etc/apk/repositories && apk update && FooBar=`date -uIs`')"

# ... from pwsh
docker run --rm -it alpine:latest ash -c "ash -c 'export ENV=`$1;ash' -s <(echo 'sed -i -E '\''s%^https?://dl-cdn\.alpinelinux\.org/alpine/%https://ftp.udx.icscoe.jp/Linux/alpine/%'\'' /etc/apk/repositories && apk update && FooBar=``date -uIs``')"