#include <u.h>#include <libc.h> char*sysname(void){	static char buf[512];	char *p, *q; 	if(buf[0])		return buf; 	if((q = getenv("sysname")) != nil && q[0] != 0){		utfecpy(buf, buf+sizeof buf, q);		free(q);		return buf;	}	if(q)		free(q); 	if(gethostname(buf, sizeof buf) >= 0){		buf[sizeof buf-1] = 0;		if((p = strchr(buf, '.')) != nil)			*p = 0;		return buf;	} 	strcpy(buf, "gnot");	return buf;}