win32: implement clearenv()

1 files changed, 10 insertions, 1 deletions

diff --git a/win32/env.c b/win32/env.c
index 376ad9d47..21b5f3d2f 100644
--- a/win32/env.c
+++ b/win32/env.c
@@ -115,5 +115,14 @@ void unsetenv(const char *env)
 
 int clearenv(void)
 {
-        bb_error_msg_and_die("clearenv() is not supported");
+        char **env = environ;
+        if (!env)
+                return 0;
+        while (*env) {
+                free(*env);
+                env++;
+        }
+        free(env);
+        environ = NULL;
+        return 0;
 }