从bash执行csh-script并且不要关闭csh-shell，但是仍然使用csh-prompt

Question

I do have a tool that requires csh, but my default shell is bash. I want/need to execute or source a csh-script from bash in the csh, and I want to end up with the csh-prompt after script execution.

From bash I can start the csh via csh and get the csh-prompt , then I can run any command in csh and remain with csh-prompt until I exit .

I also can execute a command via csh -c 'ls' for example, but after the command execution the csh exits and I am back in bash.

I want something like this (as an example)

[bash-prompt]# csh -c 'ls'
file1 file2 file3
[csh-prompt]# date
Tue Apr  2 15:33:35 CEST 2019
[csh-prompt]# exit
[bash-prompt]#

I don't find a way to achieve it - is it possible to execute a script and end up with the sub-shells prompt ?

Answer 1

Just end your script with csh .

The first thing to watch for is that your script exports all variables/functions that the subshell is supposed to see.

The second thing is to watch out for non-interactive mode - you may later decide you want to run this script non-interactively (ie, just run the script, possibly with some other commands, and exit). You'll need to handle that case separately. I've had innumerable users put sh at the bottom of their .profile or something and then wonder why my tool that was using su to execute commands with dropped privileges (from root) was hanging.