README for pam_shrundir
This is a "module" for PAM which manages creation of XDG_RUNTIME_DIR
as defined in the XDG Base Directory Specification [1].
The directory will be created once a user logs in the first time,
and it will be removed once she logs out last.
For it to work it must be included in /etc/pam.d -- to make it a
vivid part of session handling the file /etc/pam.d/common-session
seems best. Include the following early:
session optional pam_exec.so quiet /sbin/pam_shrundir
Note this PAM module does not address setting of the $XDG_RUNTIME_DIR
environment variable. Errors will be logged via syslog.
[1] https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
