#ifndef _GRP_H#include <grp/grp.h>/* Now define the internal interfaces. */externint __getgrent_r __P((struct group *__resultbuf,char*buffer,size_t __buflen,struct group **__result));externint __fgetgrent_r __P((FILE* __stream,struct group *__resultbuf,char*buffer,size_t __buflen,struct group **__result));#endif