1#include <stdlib.h>
 2#include <string.h>
 3#include <unistd.h>
 4
 5char *getenv(const char *name)
 6{
 7#ifdef __wasilibc_unmodified_upstream // Lazy environment variable init.
 8#else
 9// This specialized header is included within the function body to arranges for
10// the environment variables to be lazily initialized. It redefined `__environ`,
11// so don't remove or reorder it with respect to other code.
12#include "wasi/libc-environ-compat.h"
13#endif
14	size_t l = __strchrnul(name, '=') - name;
15	if (l && !name[l] && __environ)
16		for (char **e = __environ; *e; e++)
17			if (!strncmp(name, *e, l) && l[*e] == '=')
18				return *e + l+1;
19	return 0;
20}