diff options
| -rw-r--r-- | Modules/fcntlmodule.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Modules/fcntlmodule.c b/Modules/fcntlmodule.c index d109e29e7c..a368494c96 100644 --- a/Modules/fcntlmodule.c +++ b/Modules/fcntlmodule.c @@ -96,6 +96,10 @@ static PyObject * fcntl_ioctl(PyObject *self, PyObject *args) { int fd; + /* In PyArg_ParseTuple below, use the unsigned int 'I' format for + the signed int 'code' variable, because Python turns 0x8000000 + into a large positive number (PyLong, or PyInt on 64-bit + platforms,) whereas C expects it to be a negative int */ int code; int arg; int ret; |