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setgroups(2)
NAME
  setgroups - Sets the group access list

SYNOPSIS
  #include <unistd.h>
  #include <sys/types.h>
  int setgroups (
	  int gidsetsize,
	  gid_t grouplist[] );

PARAMETERS
  gidsetsize
	    Indicates the number of entries in the array pointed to by the
	    grouplist parameter.  Must not be more than NGROUPS_MAX, as
	    defined in the limits.h header file.

  grouplist Points to the array that contains the group access list of the
	    current user process.  Element grouplist[0] becomes the new
	    effective group ID.

DESCRIPTION
  The setgroups() function sets the group access list of the current user
  process according to the array pointed to by the grouplist parameter.	 This
  function fails unless the invoking process has superuser privilege.

NOTES
  AES Support Level:
		 Trial use

RETURN VALUES
  Upon successful completion, a value of 0 (zero) is returned.	If the
  setgroups() function fails, a value of -1 is returned and errno is set to
  indicate the error.

ERRORS
  If the setgroups() function fails, errno may be set to one of the following
  values:

  [EPERM]   The caller does not have the appropriate system privilege.

  [EINVAL]  The value of the gidsetsize parameter is greater than NGROUPS_MAX
	    or an entry in the grouplist parameter is not a valid group ID.

  [EFAULT]  The grouplist parameter points outside of the allocated address
	    space of the process.


RELATED INFORMATION
  Functions: getgroups(2), initgroups(3)