8000 [3.12] gh-69214: Fix fcntl.ioctl() request type (#119498) by vstinner · Pull Request #119505 · python/cpython · GitHub
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[3.12] gh-69214: Fix fcntl.ioctl() request type (#119498) #119505

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merged 1 commit into from
May 24, 2024
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[3.12] gh-69214: Fix fcntl.ioctl() request type (#119498) #119505

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gh-69214: Fix fcntl.ioctl() request type (#119498) 
Use an 'unsigned long' instead of an 'unsigned int' for the request
parameter of fcntl.ioctl() to support requests larger than UINT_MAX.

(cherry picked from commit 92fab33)
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@vstinner
vstinner committed May 24, 2024
commit 729941c06222731ee95e0841e3b2d8f982b66cee
3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Library/2024-05-24-11-47-08.gh-issue-69214.Grl6zF.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,3 @@
Fix ``fcntl.ioctl()`` *request* parameter: use an ``unsigned long`` instead of
an ``unsigned int`` for the *request* parameter of :func:`fcntl.ioctl` to
support requests larger than ``UINT_MAX``. Patch by Victor Stinner.
11 changes: 6 additions & 5 deletions Modules/clinic/fcntlmodule.c.h
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6 changes: 3 additions & 3 deletions Modules/fcntlmodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -108,7 +108,7 @@ fcntl_fcntl_impl(PyObject *module, int fd, int code, PyObject *arg)
fcntl.ioctl

fd: fildes
request as code: unsigned_int(bitwise=True)
request as code: unsigned_long(bitwise=True)
arg as ob_arg: object(c_default='NULL') = 0
mutate_flag as mutate_arg: bool = True
/
Expand Down Expand Up @@ -144,9 +144,9 @@ code.
[clinic start generated code]*/

static PyObject *
fcntl_ioctl_impl(PyObject *module, int fd, unsigned int code,
fcntl_ioctl_impl(PyObject *module, int fd, unsigned long code,
PyObject *ob_arg, int mutate_arg)
/*[clinic end generated code: output=7f7f5840c65991be input=967b4a4cbeceb0a8]*/
/*[clinic end generated code: output=3d8eb6828666cea1 input=cee70f6a27311e58]*/
{
#define IOCTL_BUFSZ 1024
/* We use the unsigned non-checked 'I' format for the 'code' parameter
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0