#include <u.h>#include <libc.h> intputenv(char *name, char *val){	int f;	char ename[100];	long s; 	if(strchr(name, '/') != nil)		return -1;	snprint(ename, sizeof ename, "/env/%s", name);	if(strcmp(ename+5, name) != 0)		return -1;	f = create(ename, OWRITE, 0664);	if(f < 0)		return -1;	s = strlen(val);	if(write(f, val, s) != s){		close(f);		return -1;	}	close(f);	return 0;}