Can't change user shell

[tedbyron]

-sh-3.2$ cat /etc/shells
# List of acceptable shells for chpass(1).
# Ftpd will not allow users to connect who are not using
# one of these shells.

/bin/bash
/bin/csh
/bin/dash
/bin/ksh
/bin/sh
/bin/tcsh
/bin/zsh

# List of shells managed by nix.
/run/current-system/sw/bin/bash
/run/current-system/sw/bin/zsh

-sh-3.2$ echo $SHELL
/run/current-system/sw/bin/zsh

-sh-3.2$ dscl . -read /users/ted/ UserShell
UserShell: /run/current-system/sw/bin/zsh

-sh-3.2$ echo $0
-sh

Both dscl and $SHELL show the correct shell but any time I open a new shell it uses apple bash. Any idea why this could be happening? I'm using programs.zsh and have users.users.ted.shell = pkgs.zsh. chsh also doesn't do anything because it's already set to the correct shell but running the wrong one

[Enzime]

What terminal are you using? Have you added yourself to users.knownUsers?

[tedbyron]

What terminal are you using? Have you added yourself to users.knownUsers?

Tried both alacritty and apple's terminal program. I am not currently using users.knownUsers, am I supposed to be?

[Enzime]

Yes, you want to add your own user to knownUsers. What you see when you run /run/current-system/sw/bin/zsh directly?

[tedbyron]

Gotcha thanks, can I ask why it says not to add admin users to knownUsers in the docs? I assumed I shouldn't add my account because it's the only account on the computer and is an admin.

Running the path for zsh will run it fine

[Enzime]

Ah, I forgot to update that, basically it’s because adding a user to knownUsers means that nix-darwin manages them and if you delete them from the configuration, nix-darwin will delete the user, however I’ve added some protections to prevent deleting the user you’re running darwin-rebuild switch as so it should be fine

Have you tried restarting your computer?

[tedbyron]

I added myself to knownUsers, ran darwin-rebuild switch ..., fully power cycled my computer, still got the same issue. Issue first appeared when I switched to the 24.11 release of nixpkgs & home manager.

[Enzime]

Are you setting the SHELL environment variable somewhere?

[tedbyron]

Nope

[Enzime]

Have you tried quitting Terminal.app and opening it fresh?

[tedbyron]

Yeah I killed the tmux session too, no change

[Enzime]

In the menus there should be a New Command option and if you use that and put /run/current-system/sw/bin/zsh does it work?

[tedbyron]

No, that's what is currently entered in that setting

[Enzime]

What happens if you change that back to Default login shell? Also what happens if you run New Command with /bin/zsh?

[tedbyron]

Thanks for the help, the issue has to do with something in my tmux config - just rebuilt without tmux and it's fine. Didn't notice that earlier because every shell auto attaches to tmux

[tedbyron]

Looks like tmux just doesn't use my shell when I start it up

[Enzime]

I have no tmux configuration and it launches the correct shell. You can run a tmux server then run tmux show -g in any window

[Enzime]

$ tmux show -g
...
default-command ''                                                              
default-shell /run/current-system/sw/bin/zsh
...

[tedbyron]

there's the issue, looks like tmux-sensible plugin has `$SHELL` as /bin/sh when it's running for some reason

[Enzime]

According to this commit, reattach-to-user-namespace is not necessary anymore:

9a04aea

Maybe you can just override it with set -g default-command '' somewhere in your config?

[Enzime]

Looks like there's a pull request to fix this: tmux-plugins/tmux-sensible#75

[Enzime]

It looks like reattach-to-user-namespace is only used if that command exists:

https://github.com/tmux-plugins/tmux-sensible/blob/25cb91f42d020f675bb0a2ce3fbd3a5d96119efa/sensible.tmux#L102-L104

So you can make sure the package is not installed and you don't need to set anything else

[tedbyron]

Thanks for the help!