#include <utmp.h>static	char	UTMP[]	= "/etc/utmp";static	struct	utmp ubuf;char *getlogin(){	register me, uf;	register char *cp;	if( !(me = ttyslot()) )		return(0);	if( (uf = open( UTMP, 0 )) < 0 )		return(0);	lseek( uf, (long)(me*sizeof(ubuf)), 0 );	if (read(uf, (char *)&ubuf, sizeof(ubuf)) != sizeof(ubuf))		return(0);	close(uf);	ubuf.ut_name[8] = ' ';	for (cp=ubuf.ut_name; *cp++!=' ';)		;	*--cp = '\0';	return( ubuf.ut_name );}