libc-top-half/musl/src/env/clearenv.c

   1 #define _GNU_SOURCE
   2 #include <stdlib.h>
   3 #include <unistd.h>
   4
   5 static void dummy(char *old, char *new) {}
   6 weak_alias(dummy, __env_rm_add);
   7
   8 int clearenv()
   9 {
  10 #ifdef __wasilibc_unmodified_upstream // Lazy environment variable init.
  11 #else
  12 // This specialized header is included within the function body to arranges for
  13 // the environment variables to be lazily initialized. It redefined `__environ`,
  14 // so don't remove or reorder it with respect to other code.
  15 #include "wasi/libc-environ-compat.h"
  16 #endif
  17         char **e = __environ;
  18         __environ = 0;
  19         if (e) while (*e) __env_rm_add(*e++, 0);
  20         return 0;
  21 }