The unix.users vocabulary contains words that return information about Unix users.

Listing all users:

all-users ( -- seq )

Listing all user names:

all-user-names ( -- seq )

Checking if a user exists:

user-exists? ( name/id -- ? )

Querying/setting the current real user:

real-user-name ( -- string )

real-user-id ( -- id )

set-real-user ( string/id -- )

Querying/setting the current effective user:

effective-user-name ( -- string )

effective-user-id ( -- id )

set-effective-user ( string/id -- )

Combinators to change users:

with-real-user ( string/id/f quot -- )

with-effective-user ( string/id/f quot -- )