getgroups(2)                                         getgroups(2)



NAME
     getgroups - gets group access list

SYNOPSIS
     #include <sys/param.h>

     int getgroups(gidsetlen, gidset)
     int gidsetlen, *gidset;

DESCRIPTION
     getgroups gets the current group access list of the user
     process and stores it in the array gidset.  The parameter
     gidsetlen indicates the number of entries that may be placed
     in gidset.

     getgroups returns the actual number of groups returned in
     gidset.  No more than NGROUPS, as defined in <sys/param.h>,
     will ever be returned.

STATUS MESSAGES AND VALUES
     A successful call returns the number of groups in the group
     set.  A value of -1 indicates that an error occurred and the
     error code is stored in the global variable errno.

     The possible errors for getgroups are:

     EINVAL
          The argument gidsetlen is smaller than the number of
          groups in the group set.

     EFAULT
          The argument gidset specifies an invalid address.

LIMITATIONS
     The gidset array should be of type gid_t, but remains
     integer for compatibility with earlier systems.

SEE ALSO
     setgroups(2), initgroups(3X)
















January 1992                                                    1