1 2 3 4 5 6 7 8 9 10 11 12 13 14
#define _GNU_SOURCE #include <stdlib.h> #include "libc.h" static void dummy(char *old, char *new) {} weak_alias(dummy, __env_rm_add); int clearenv() { char **e = __environ; __environ = 0; if (e) while (*e) __env_rm_add(*e++, 0); return 0; }