torvalds/linux

What:        Audit Login UID
Date:        2005-02-01
KernelVersion:    2.6.11-rc2 1e2d1492e178 ("[PATCH] audit: handle loginuid through proc")
Contact:    linux-audit@redhat.com
Users:        audit and login applications
Description:
        The /proc/$pid/loginuid pseudofile is written to set and
        read to get the audit login UID of process $pid as a
        decimal unsigned int (%u, u32).  If it is unset,
        permissions are not needed to set it.  The accessor must
        have CAP_AUDIT_CONTROL in the initial user namespace to
        write it if it has been set.  It cannot be written again
        if AUDIT_FEATURE_LOGINUID_IMMUTABLE is enabled.  It
        cannot be unset if AUDIT_FEATURE_ONLY_UNSET_LOGINUID is
        enabled.

What:        Audit Login Session ID
Date:        2008-03-13
KernelVersion:    2.6.25-rc7 1e0bd7550ea9 ("[PATCH] export sessionid alongside the loginuid in procfs")
Contact:    linux-audit@redhat.com
Users:        audit and login applications
Description:
        The /proc/$pid/sessionid pseudofile is read to get the
        audit login session ID of process $pid as a decimal
        unsigned int (%u, u32).  It is set automatically,
        serially assigned with each new login.