--- a/libc.pxd	Sun Aug 16 03:39:52 2009 +0300
+++ b/libc.pxd	Sun Aug 16 04:15:07 2009 +0300
@@ -22,9 +22,14 @@
     ctypedef int16_t __s16
     ctypedef int32_t __s32
 
+cdef extern from "errno.h" :
+    int errno
+    
 cdef extern from "string.h" :
     void* memcpy (void *dest, void *src, size_t n)
 
+    char* strerror (int errno)
+
 cdef extern from "alloca.h" :
     void* alloca (size_t size)