Create free_disk_space.c

system/free_disk_space.c

@@ -0,0 +1,23 @@
+#include <windows.h>
+#include <wchar.h>
+
+int wmain(void) {
+
+    unsigned __int64 FreeBytesToCaller,
+                     TotalBytes,
+                     FreeBytes;
+
+    int r = GetDiskFreeSpaceExW(L"C:\\", (PULARGE_INTEGER) &FreeBytesToCaller,
+       (PULARGE_INTEGER) &TotalBytes, (PULARGE_INTEGER) &FreeBytes);
+
+    if (r == 0) {
+        wprintf(L"Failed to get free disk space %ld", GetLastError());
+        return 1;
+    }	
+
+    wprintf(L"Available space to caller: %I64u MB\n", FreeBytesToCaller / (1024*1024));
+    wprintf(L"Total space: %I64u MB\n", TotalBytes / (1024*1024));
+    wprintf(L"Free space on drive: %I64u MB\n", FreeBytes / (1024*1024));
+    
+    return 0;
+}