github.com/afumu/libc@v0.0.6/musl/src/env/clearenv.c (about)

     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  	char **e = __environ;
    11  	__environ = 0;
    12  	if (e) while (*e) __env_rm_add(*e++, 0);
    13  	return 0;
    14  }