Ronan Pigott
3d2157e707
This flag was added indb6aedab92with the justification that locale environment variables should be preserved by the user session. However, the companion patch to drop the UnsetEnvironment= directive blocking these variables was never merged, so the intended change was never effected. While the patch was ineffective toward its stated goal, the "-p" option does have material negative consequences for the user session in systemd — environment variables to support the use of credentials and memory pressure directives, such as $CREDENTIALS_DIRECTORY and $MEMORY_PRESSURE_WATCH, which are now directly used by agetty and login, get leaked into the user session potentially breaking applications that rely on these values. E.g. systemd-ask-password fails from the tty when $CREDENTIALS_DIRECTORY has been leaked from agetty, because it expects to be able to access credentials in $CREDENTIALS_DIRECTORY. This effectively revertsdb6aedab92. References:db6aedab92(units: Tell login to preserve environment (#6023), 2017-05-24)
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