1 files changed, 20 insertions, 0 deletions
diff --git a/libc-top-half/musl/src/env/getenv.c b/libc-top-half/musl/src/env/getenv.c
new file mode 100644
index 0000000..346c333
--- /dev/null
+++ b/libc-top-half/musl/src/env/getenv.c
@@ -0,0 +1,20 @@
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+char *getenv(const char *name)
+{
+#ifdef __wasilibc_unmodified_upstream // Lazy environment variable init.
+#else
+// This specialized header is included within the function body to arranges for
+// the environment variables to be lazily initialized. It redefined `__environ`,
+// so don't remove or reorder it with respect to other code.
+#include "wasi/libc-environ-compat.h"
+#endif
+	size_t l = __strchrnul(name, '=') - name;
+	if (l && !name[l] && __environ)
+		for (char **e = __environ; *e; e++)
+			if (!strncmp(name, *e, l) && l[*e] == '=')
+				return *e + l+1;
+	return 0;
+}