opensolaris man page for groups

groups(1B)					     SunOS/BSD Compatibility Package Commands						groups(1B)

NAME
       groups - display a user's group memberships

SYNOPSIS
       /usr/ucb/groups [user]...

DESCRIPTION
       With  no  arguments,   groups  displays	the  groups  to which you belong; else it displays the groups to which the user belongs. Each user
       belongs to a group specified in the password file /etc/passwd and possibly to other groups as specified in the file /etc/group. If  you	do
       not own a file but belong to the group which it is owned by then you are granted group access to the file.

FILES
       /etc/passwd

       /etc/group

ATTRIBUTES
       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWscpu			   |
       +-----------------------------+-----------------------------+

SEE ALSO
       getgroups(2), attributes(5)

NOTES
       This command is obsolete.

SunOS 5.11							    14 Sep 1992 							groups(1B)