#include <stdio.h>
#include <grp.h>

int
main ()
{
  struct group *grp;

  setgrent ();
  while ((grp = getgrent ()))
    printf ("%s:%s:%u:\n",
	    grp->gr_name,
	    grp->gr_passwd,
	    grp->gr_gid);
  endgrent ();
  return 0;
}