6 char *__strchrnul(const char *, int);
8 static void dummy(char *old, char *new) {}
9 weak_alias(dummy, __env_rm_add);
11 int unsetenv(const char *name)
13 size_t l = __strchrnul(name, '=') - name;
19 char **e = __environ, **eo = e;
21 if (!strncmp(name, *e, l) && l[*e] == '=')