xgetenv
char *xp = xgetenv("DEBUG");
if ((p = xgetenv("CLUSTER")) != (char *)NULL) {
failsafe = xgetenv("FAILSAFE");
extern char *xgetenv(char *);
if (fp = xgetenv("CLUSTER")) {
if ((ret = xgetenv("DOMAIN")) != 0) {
char *ret = xgetenv(env);
extern char *xgetenv(char *env);
extern char *xgetenv();