Windows: TMP and TEMP environment variables specify a temporary directory.

Signed-off-by: Johannes Sixt <johannes.sixt@telecom.at>

compat/mingw.c

@@ -366,6 +366,19 @@ char *mingw_getcwd(char *pointer, int len)
 	return ret;
 }
 
+#undef getenv
+char *mingw_getenv(const char *name)
+{
+	char *result = getenv(name);
+	if (!result && !strcmp(name, "TMPDIR")) {
+		/* on Windows it is TMP and TEMP */
+		result = getenv("TMP");
+		if (!result)
+			result = getenv("TEMP");
+	}
+	return result;
+}
+
 /*
  * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
  * (Parsing C++ Command-Line Arguments)

compat/mingw.h

@@ -145,6 +145,9 @@ int mingw_open (const char *filename, int oflags, ...);
 char *mingw_getcwd(char *pointer, int len);
 #define getcwd mingw_getcwd
 
+char *mingw_getenv(const char *name);
+#define getenv mingw_getenv
+
 struct hostent *mingw_gethostbyname(const char *host);
 #define gethostbyname mingw_gethostbyname