NAME
groups — show group memberships
SYNOPSIS
groups
[-p]
[-g]
[-l]
[user]
DESCRIPTION
groups
shows the groups to which the caller or the optionally specified
user
belong.
If invoked with no arguments,
groups
prints the current access list returned by
getgroups()
(see
getgroups(2)).
Each user belongs to a group specified in the password file
/etc/passwd
and possibly to other groups as specified in the files
/etc/group
and
/etc/logingroup.
A user is granted the permissions of those groups specified in
/etc/passwd
and
/etc/logingroup
at login time.
The permissions of the groups specified in
/etc/group
are normally available only with the use of
newgrp
(see
newgrp(1)).
If a user name is specified with no options,
groups
prints the union of all these groups.
The
-p,
-g,
and
-l
options limit the printed list to those groups specified in
/etc/passwd,
/etc/group,
and
/etc/logingroup,
respectively.
If a user name is not specified with any of these options,
cuserid()
is called to determine the default user name (see
cuserid(3S)).
The printed list of groups is sorted in ascending collation order
(see Environment Variables below).
EXTERNAL INFLUENCES
Environment Variables
LC_COLLATE
determines the order in which the output is sorted.
If
LC_COLLATE
is not specified in the environment or is set to the empty string,
the value of
LANG
is used as a default.
If
LANG
is not specified or is set to the empty string, a default of ``C'' (see
lang(5))
is used instead of
LANG.
If any internationalization variable contains an invalid setting,
groups
behaves as if all internationalization variables are set to ``C'' (see
environ(5)).
EXAMPLES
Check file
/etc/logingroup
and display all groups to which user
tim
belongs:
AUTHOR
groups
was developed by the University of California, Berkeley.
FILES
/etc/group
/etc/logingroup
/etc/passwd
