- for (P = environ, cnt = 0; *P; ++P, ++cnt);
- if (alloced) { /* just increase size */
- P = (char **)realloc((void *)environ,
- (size_t)(sizeof(char *) * (cnt + 2)));
- if (!P)
- return (-1);
- environ = P;
- }
- else { /* get new space */
- alloced = 1; /* copy old entries into it */
- P = (char **)malloc((size_t)(sizeof(char *) *
- (cnt + 2)));
- if (!P)
- return (-1);
- memmove(P, environ, cnt * sizeof(char *));
- environ = P;
- }
- environ[cnt + 1] = NULL;
+ for (P = environ; *P != NULL; P++)
+ ;
+ cnt = P - environ;
+ P = (char **)realloc(lastenv, sizeof(char *) * (cnt + 2));
+ if (!P)
+ return (-1);
+ if (lastenv != environ)
+ memcpy(P, environ, cnt * sizeof(char *));
+ lastenv = environ = P;