shadow-4.20.0: -bash: cannot set terminal process group (-1): Inappropriate ioctl for device -bash: no job control in this shell

[hdejin]

shadow-4.20.0 gives me the following error when running su - <USERNAME> as root.

-bash: cannot set terminal process group (-1): Inappropriate ioctl for device
-bash: no job control in this shell

Edit: su - as a limited user is fine.

[jubalh]

Probably related to f384b3d, @hallyn.

[alejandro-colomar]

Probably related to f384b3d, @hallyn.

Yup; this seems intended, IIRC.

I think you should use runuser(1) instead, which is provided by util-linux.

Alternatively, you should disable TIOCSTI.

If runuser(1) from util-linux has any issues which make it unusable for you (e.g., it uses PAM, and some users still avoid PAM), we were thinking that we could implement a runuser(1) here in shadow-utils, which wouldn't require PAM.