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I am using OpenBSD-current. After doas pkg_add fish, I ran chsh -s $(which fish) to change the default shell of my user qys to fish, and it works:

$ /usr/bin/ssh magicbane
Last login: Wed Aug 21 11:17:12 on ttyp0 from 100.94.151.103
OpenBSD 7.6-beta (GENERIC.MP) #270: Tue Aug 20 10:51:30 MDT 2024

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Welcome to fish, the friendly interactive shell
Type help for instructions on how to use fish
qys@magicbane ~> echo $SHELL
/usr/local/bin/fish

However,

$ /usr/bin/ssh magicbane 'echo $SHELL'
/bin/sh

I wonder why this didn't give me /usr/local/bin/fish? This is not a problem itself, but I suspect it has something to do with this issue that I'm trying to solve.

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  • Are you at all using SSH connection sharing? If not, I can not reproduce this on my OpenBSD system. If you are using connection sharing, then issue ssh -O exit magicbane to close the master connection.
    – Kusalananda ♦
    Commented Aug 21 at 15:37
  • Isn’t SHELL meant to point to a POSIX-/Bourne-compatible shell (which fish isn’t)?
    – user3840170
    Commented Aug 21 at 15:37
  • What does ssh magicbane getent passwd qys output?
    – muru
    Commented Aug 21 at 15:37
  • @user3840170 SHELL is set to the user's login shell by the login process (from the passwd database). Whether this is a POSIX shell or Python does not matter.
    – Kusalananda ♦
    Commented Aug 21 at 15:46
  • 1
    @Kusalananda I'm not sure what is SSH connection sharing. How do I check if I have it enabled? Also /usr/bin/ssh -O exit magicbane gives me No ControlPath specified for "-O" command and exit code 255.
    – nalzok
    Commented Aug 21 at 15:53

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