cURL-build-win32/patch/curl_getenv.diff

 lib/getenv.c | 47 ++++++++++++++++++++++++++++++-----------------
 1 file changed, 30 insertions(+), 17 deletions(-)

diff --git a/lib/getenv.c b/lib/getenv.c
index 49a2e50..dbf2642 100644
--- a/lib/getenv.c
+++ b/lib/getenv.c
@@ -26,26 +26,23 @@
 
 #include <curl/curl.h>
 #include "curl_memory.h"
+#include "curlx.h"
 
 #include "memdebug.h"
 
-static char *GetEnv(const char *variable)
+#if defined(_WIN32)
+static wchar_t *GetEnv(const wchar_t *variable)
 {
-#if defined(_WIN32_WCE) || defined(CURL_WINDOWS_UWP) || \
-  defined(__ORBIS__) || defined(__PROSPERO__) /* PlayStation 4 and 5 */
-  (void)variable;
-  return NULL;
-#elif defined(_WIN32)
   /* This uses Windows API instead of C runtime getenv() to get the environment
      variable since some changes are not always visible to the latter. #4774 */
-  char *buf = NULL;
-  char *tmp;
+  wchar_t *buf = NULL;
+  wchar_t *tmp;
   DWORD bufsize;
   DWORD rc = 1;
   const DWORD max = 32768; /* max env var size from MSCRT source */
 
   for(;;) {
-    tmp = realloc(buf, rc);
+    tmp = (wchar_t*)realloc(buf, rc * sizeof(wchar_t));
     if(!tmp) {
       free(buf);
       return NULL;
@@ -56,25 +53,41 @@ static char *GetEnv(const char *variable)
 
     /* it is possible for rc to be 0 if the variable was found but empty.
        Since getenv does not make that distinction we ignore it as well. */
-    rc = GetEnvironmentVariableA(variable, buf, bufsize);
+    rc = GetEnvironmentVariableW(variable, buf, bufsize);
     if(!rc || rc == bufsize || rc > max) {
       free(buf);
       return NULL;
     }
 
     /* if rc < bufsize then rc is bytes written not including null */
-    if(rc < bufsize)
+    if(rc < bufsize) {
       return buf;
-
+    }
     /* else rc is bytes needed, try again */
   }
+}
+#endif
+
+char *curl_getenv(const char *variable)
+{
+#if defined(_WIN32_WCE) || defined(CURL_WINDOWS_UWP) || \
+  defined(__ORBIS__) || defined(__PROSPERO__) /* PlayStation 4 and 5 */
+  (void)variable;
+  return NULL;
+#elif defined(_WIN32)
+  char *value = NULL;
+  wchar_t *variable_w = curlx_convert_UTF8_to_wchar(variable);
+  if(variable_w) {
+    wchar_t *value_w = GetEnv(variable_w);
+    if(value_w) {
+      value = curlx_convert_wchar_to_UTF8(value_w);
+      free(value_w);
+    }
+    free(variable_w);
+  }
+  return value;
 #else
   char *env = getenv(variable);
   return (env && env[0]) ? strdup(env) : NULL;
 #endif
 }
-
-char *curl_getenv(const char *v)
-{
-  return GetEnv(v);
-}