Mine

#include <stdio.h>#include <stdlib.h>#include <string.h>#include <sys/types.h>#include <grp.h>intmain(){    struct group *le_groupe ;    le_groupe = getgrnam("audio") ;    printf("nom: %s\nid: %d\n", le_groupe->gr_name, le_groupe->gr_gid) ;    return 0 ;}