From 97b80af897cd3376a5be66c8d5d63310723a1590 Mon Sep 17 00:00:00 2001 From: Victor Stinner Date: Thu, 14 Mar 2024 13:01:13 +0100 Subject: [PATCH] gh-85283: Build fcntl extension with the limited C API (#116791) --- Doc/whatsnew/3.13.rst | 4 +- ...4-03-14-10-33-58.gh-issue-85283.LOgmdU.rst | 2 + Modules/clinic/fcntlmodule.c.h | 49 +++++++++++++------ Modules/fcntlmodule.c | 19 ++++--- 4 files changed, 48 insertions(+), 26 deletions(-) create mode 100644 Misc/NEWS.d/next/C API/2024-03-14-10-33-58.gh-issue-85283.LOgmdU.rst diff --git a/Doc/whatsnew/3.13.rst b/Doc/whatsnew/3.13.rst index d78f219ed3a..aec02954b9f 100644 --- a/Doc/whatsnew/3.13.rst +++ b/Doc/whatsnew/3.13.rst @@ -1460,8 +1460,8 @@ Build Changes * Building CPython now requires a compiler with support for the C11 atomic library, GCC built-in atomic functions, or MSVC interlocked intrinsics. -* The ``errno``, ``md5``, ``resource``, ``winsound``, ``_ctypes_test``, - ``_multiprocessing.posixshmem``, ``_scproxy``, ``_stat``, +* The ``errno``, ``fcntl``, ``grp``, ``md5``, ``resource``, ``winsound``, + ``_ctypes_test``, ``_multiprocessing.posixshmem``, ``_scproxy``, ``_stat``, ``_testimportmultiple`` and ``_uuid`` C extensions are now built with the :ref:`limited C API `. (Contributed by Victor Stinner in :gh:`85283`.) diff --git a/Misc/NEWS.d/next/C API/2024-03-14-10-33-58.gh-issue-85283.LOgmdU.rst b/Misc/NEWS.d/next/C API/2024-03-14-10-33-58.gh-issue-85283.LOgmdU.rst new file mode 100644 index 00000000000..a02b8a8210f --- /dev/null +++ b/Misc/NEWS.d/next/C API/2024-03-14-10-33-58.gh-issue-85283.LOgmdU.rst @@ -0,0 +1,2 @@ +The ``fcntl`` and ``grp`` C extensions are now built with the :ref:`limited +C API `. (Contributed by Victor Stinner in :gh:`85283`.) diff --git a/Modules/clinic/fcntlmodule.c.h b/Modules/clinic/fcntlmodule.c.h index 5dc2fc068d0..d4846ddf8df 100644 --- a/Modules/clinic/fcntlmodule.c.h +++ b/Modules/clinic/fcntlmodule.c.h @@ -2,9 +2,6 @@ preserve [clinic start generated code]*/ -#include "pycore_fileutils.h" // _PyLong_FileDescriptor_Converter() -#include "pycore_modsupport.h" // _PyArg_CheckPositional() - PyDoc_STRVAR(fcntl_fcntl__doc__, "fcntl($module, fd, cmd, arg=0, /)\n" "--\n" @@ -22,7 +19,7 @@ PyDoc_STRVAR(fcntl_fcntl__doc__, "corresponding to the return value of the fcntl call in the C code."); #define FCNTL_FCNTL_METHODDEF \ - {"fcntl", _PyCFunction_CAST(fcntl_fcntl), METH_FASTCALL, fcntl_fcntl__doc__}, + {"fcntl", (PyCFunction)(void(*)(void))fcntl_fcntl, METH_FASTCALL, fcntl_fcntl__doc__}, static PyObject * fcntl_fcntl_impl(PyObject *module, int fd, int code, PyObject *arg); @@ -35,10 +32,16 @@ fcntl_fcntl(PyObject *module, PyObject *const *args, Py_ssize_t nargs) int code; PyObject *arg = NULL; - if (!_PyArg_CheckPositional("fcntl", nargs, 2, 3)) { + if (nargs < 2) { + PyErr_Format(PyExc_TypeError, "fcntl expected at least 2 arguments, got %zd", nargs); goto exit; } - if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) { + if (nargs > 3) { + PyErr_Format(PyExc_TypeError, "fcntl expected at most 3 arguments, got %zd", nargs); + goto exit; + } + fd = PyObject_AsFileDescriptor(args[0]); + if (fd < 0) { goto exit; } code = PyLong_AsInt(args[1]); @@ -90,7 +93,7 @@ PyDoc_STRVAR(fcntl_ioctl__doc__, "code."); #define FCNTL_IOCTL_METHODDEF \ - {"ioctl", _PyCFunction_CAST(fcntl_ioctl), METH_FASTCALL, fcntl_ioctl__doc__}, + {"ioctl", (PyCFunction)(void(*)(void))fcntl_ioctl, METH_FASTCALL, fcntl_ioctl__doc__}, static PyObject * fcntl_ioctl_impl(PyObject *module, int fd, unsigned int code, @@ -105,10 +108,16 @@ fcntl_ioctl(PyObject *module, PyObject *const *args, Py_ssize_t nargs) PyObject *ob_arg = NULL; int mutate_arg = 1; - if (!_PyArg_CheckPositional("ioctl", nargs, 2, 4)) { + if (nargs < 2) { + PyErr_Format(PyExc_TypeError, "ioctl expected at least 2 arguments, got %zd", nargs); goto exit; } - if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) { + if (nargs > 4) { + PyErr_Format(PyExc_TypeError, "ioctl expected at most 4 arguments, got %zd", nargs); + goto exit; + } + fd = PyObject_AsFileDescriptor(args[0]); + if (fd < 0) { goto exit; } code = (unsigned int)PyLong_AsUnsignedLongMask(args[1]); @@ -143,7 +152,7 @@ PyDoc_STRVAR(fcntl_flock__doc__, "function is emulated using fcntl())."); #define FCNTL_FLOCK_METHODDEF \ - {"flock", _PyCFunction_CAST(fcntl_flock), METH_FASTCALL, fcntl_flock__doc__}, + {"flock", (PyCFunction)(void(*)(void))fcntl_flock, METH_FASTCALL, fcntl_flock__doc__}, static PyObject * fcntl_flock_impl(PyObject *module, int fd, int code); @@ -155,10 +164,12 @@ fcntl_flock(PyObject *module, PyObject *const *args, Py_ssize_t nargs) int fd; int code; - if (!_PyArg_CheckPositional("flock", nargs, 2, 2)) { + if (nargs != 2) { + PyErr_Format(PyExc_TypeError, "flock expected 2 arguments, got %zd", nargs); goto exit; } - if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) { + fd = PyObject_AsFileDescriptor(args[0]); + if (fd < 0) { goto exit; } code = PyLong_AsInt(args[1]); @@ -199,7 +210,7 @@ PyDoc_STRVAR(fcntl_lockf__doc__, " 2 - relative to the end of the file (SEEK_END)"); #define FCNTL_LOCKF_METHODDEF \ - {"lockf", _PyCFunction_CAST(fcntl_lockf), METH_FASTCALL, fcntl_lockf__doc__}, + {"lockf", (PyCFunction)(void(*)(void))fcntl_lockf, METH_FASTCALL, fcntl_lockf__doc__}, static PyObject * fcntl_lockf_impl(PyObject *module, int fd, int code, PyObject *lenobj, @@ -215,10 +226,16 @@ fcntl_lockf(PyObject *module, PyObject *const *args, Py_ssize_t nargs) PyObject *startobj = NULL; int whence = 0; - if (!_PyArg_CheckPositional("lockf", nargs, 2, 5)) { + if (nargs < 2) { + PyErr_Format(PyExc_TypeError, "lockf expected at least 2 arguments, got %zd", nargs); goto exit; } - if (!_PyLong_FileDescriptor_Converter(args[0], &fd)) { + if (nargs > 5) { + PyErr_Format(PyExc_TypeError, "lockf expected at most 5 arguments, got %zd", nargs); + goto exit; + } + fd = PyObject_AsFileDescriptor(args[0]); + if (fd < 0) { goto exit; } code = PyLong_AsInt(args[1]); @@ -246,4 +263,4 @@ skip_optional: exit: return return_value; } -/*[clinic end generated code: output=732e33ba92042031 input=a9049054013a1b77]*/ +/*[clinic end generated code: output=26793691ab1c75ba input=a9049054013a1b77]*/ diff --git a/Modules/fcntlmodule.c b/Modules/fcntlmodule.c index 0d16602692b..e24e5f98f4b 100644 --- a/Modules/fcntlmodule.c +++ b/Modules/fcntlmodule.c @@ -1,22 +1,25 @@ /* fcntl module */ -#ifndef Py_BUILD_CORE_BUILTIN -# define Py_BUILD_CORE_MODULE 1 +// Need limited C API version 3.13 for PyLong_AsInt() +#include "pyconfig.h" // Py_GIL_DISABLED +#ifndef Py_GIL_DISABLED +# define Py_LIMITED_API 0x030d0000 #endif #include "Python.h" +#include // EINTR +#include // fcntl() +#include // memcpy() +#include // ioctl() #ifdef HAVE_SYS_FILE_H -#include +# include // flock() #endif #ifdef HAVE_LINUX_FS_H -#include +# include #endif - -#include -#include #ifdef HAVE_STROPTS_H -#include +# include // I_FLUSHBAND #endif /*[clinic input]