sulogin is the single user mode login program used to force the console user to login under a root account before a shell is started. Unlike other implementations of sulogin, this one supports having multiple root accounts on a system.
msulogin has been developed as part of Owl and is being made available separately primarily for use by other distributions. Currently, msulogin supports only systems with getspnam(3).
These files are also available from the Openwall file archive. The source code of msulogin can be browsed on GitHub or via CVSweb.
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msulogin is fully integrated into Owl and distributions by ALT Linux team.