of the compiler used. Different compilers define their own feature
test macro, e.g. '_MSC_VER'. */
+// --- Python includes ------------------------------------------------------
+
#include "Python.h"
#ifdef __VXWORKS__
#include "pycore_time.h" // _PyLong_FromTime_t()
#include "pycore_typeobject.h" // _PyType_AddMethod()
-#ifdef HAVE_UNISTD_H
-# include <unistd.h> // symlink()
-#endif
-
-#ifdef MS_WINDOWS
-# include <windows.h>
-# if !defined(MS_WINDOWS_GAMES) || defined(MS_WINDOWS_DESKTOP)
-# include <pathcch.h>
-# endif
-# include <winioctl.h>
-# include <lmcons.h> // UNLEN
-# include "osdefs.h" // SEP
-# include <aclapi.h> // SetEntriesInAcl
-# include <sddl.h> // SDDL_REVISION_1
-# if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)
-# define HAVE_SYMLINK
-# endif /* MS_WINDOWS_DESKTOP | MS_WINDOWS_SYSTEM */
-#endif
-
#ifndef MS_WINDOWS
-# include "posixmodule.h"
+# include "posixmodule.h" // _PyLong_FromUid()
#else
-# include "pycore_fileutils_windows.h"
-# include "winreparse.h"
+# include "pycore_fileutils_windows.h" // _Py_GetFileInformationByName()
+# include "osdefs.h" // SEP
+# include "winreparse.h" // _Py_REPARSE_DATA_BUFFER
#endif
-#if !defined(EX_OK) && defined(EXIT_SUCCESS)
-# define EX_OK EXIT_SUCCESS
+
+// --- System includes ------------------------------------------------------
+
+#include <stdio.h> // ctermid()
+#include <stdlib.h> // system()
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h> // symlink()
#endif
#ifdef __APPLE__
- /* Needed for the implementation of os.statvfs */
+ /* Needed for the implementation of os.statvfs */
# include <sys/param.h>
# include <sys/mount.h>
#endif
-/* On android API level 21, 'AT_EACCESS' is not declared although
- * HAVE_FACCESSAT is defined. */
-#ifdef __ANDROID__
-# undef HAVE_FACCESSAT
-#endif
-
-#include <stdio.h> // ctermid()
-#include <stdlib.h> // system()
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h> // futimes()
#endif
+
#ifdef HAVE_SYS_PIDFD_H
# include <sys/pidfd.h> // PIDFD_NONBLOCK
#endif
-
-// SGI apparently needs this forward declaration
-#ifdef HAVE__GETPTY
-# include <sys/types.h> // mode_t
- extern char * _getpty(int *, int, mode_t, int);
-#endif
-
#ifdef __EMSCRIPTEN__
-#include "emscripten.h" // emscripten_debugger()
-#endif
-
-/*
- * A number of APIs are available on macOS from a certain macOS version.
- * To support building with a new SDK while deploying to older versions
- * the availability test is split into two:
- * - HAVE_<FUNCTION>: The configure check for compile time availability
- * - HAVE_<FUNCTION>_RUNTIME: Runtime check for availability
- *
- * The latter is always true when not on macOS, or when using a compiler
- * that does not support __has_builtin (older versions of Xcode).
- *
- * Due to compiler restrictions there is one valid use of HAVE_<FUNCTION>_RUNTIME:
- * if (HAVE_<FUNCTION>_RUNTIME) { ... }
- *
- * In mixing the test with other tests or using negations will result in compile
- * errors.
- */
-#if defined(__APPLE__)
-
-#include <mach/mach.h>
-
-#if defined(__has_builtin)
-#if __has_builtin(__builtin_available)
-#define HAVE_BUILTIN_AVAILABLE 1
-#endif
-#endif
-
-#ifdef HAVE_BUILTIN_AVAILABLE
-# define HAVE_FSTATAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
-# define HAVE_FACCESSAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
-# define HAVE_FCHMODAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
-# define HAVE_FCHOWNAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
-# define HAVE_LINKAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
-# define HAVE_FDOPENDIR_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
-# define HAVE_MKDIRAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
-# define HAVE_RENAMEAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
-# define HAVE_UNLINKAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
-# define HAVE_OPENAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
-# define HAVE_READLINKAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
-# define HAVE_SYMLINKAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
-# define HAVE_FUTIMENS_RUNTIME __builtin_available(macOS 10.13, iOS 11.0, tvOS 11.0, watchOS 4.0, *)
-# define HAVE_UTIMENSAT_RUNTIME __builtin_available(macOS 10.13, iOS 11.0, tvOS 11.0, watchOS 4.0, *)
-# define HAVE_PWRITEV_RUNTIME __builtin_available(macOS 11.0, iOS 14.0, tvOS 14.0, watchOS 7.0, *)
-# define HAVE_MKFIFOAT_RUNTIME __builtin_available(macOS 13.0, iOS 16.0, tvOS 16.0, watchOS 9.0, *)
-# define HAVE_MKNODAT_RUNTIME __builtin_available(macOS 13.0, iOS 16.0, tvOS 16.0, watchOS 9.0, *)
-# define HAVE_PTSNAME_R_RUNTIME __builtin_available(macOS 10.13.4, iOS 11.3, tvOS 11.3, watchOS 4.3, *)
-
-# define HAVE_POSIX_SPAWN_SETSID_RUNTIME __builtin_available(macOS 10.15, *)
-
-#else /* Xcode 8 or earlier */
-
- /* __builtin_available is not present in these compilers, but
- * some of the symbols might be weak linked (10.10 SDK or later
- * deploying on 10.9.
- *
- * Fall back to the older style of availability checking for
- * symbols introduced in macOS 10.10.
- */
-
-# ifdef HAVE_FSTATAT
-# define HAVE_FSTATAT_RUNTIME (fstatat != NULL)
-# endif
-
-# ifdef HAVE_FACCESSAT
-# define HAVE_FACCESSAT_RUNTIME (faccessat != NULL)
-# endif
-
-# ifdef HAVE_FCHMODAT
-# define HAVE_FCHMODAT_RUNTIME (fchmodat != NULL)
-# endif
-
-# ifdef HAVE_FCHOWNAT
-# define HAVE_FCHOWNAT_RUNTIME (fchownat != NULL)
-# endif
-
-# ifdef HAVE_LINKAT
-# define HAVE_LINKAT_RUNTIME (linkat != NULL)
-# endif
-
-# ifdef HAVE_FDOPENDIR
-# define HAVE_FDOPENDIR_RUNTIME (fdopendir != NULL)
-# endif
-
-# ifdef HAVE_MKDIRAT
-# define HAVE_MKDIRAT_RUNTIME (mkdirat != NULL)
-# endif
-
-# ifdef HAVE_RENAMEAT
-# define HAVE_RENAMEAT_RUNTIME (renameat != NULL)
-# endif
-
-# ifdef HAVE_UNLINKAT
-# define HAVE_UNLINKAT_RUNTIME (unlinkat != NULL)
-# endif
-
-# ifdef HAVE_OPENAT
-# define HAVE_OPENAT_RUNTIME (openat != NULL)
-# endif
-
-# ifdef HAVE_READLINKAT
-# define HAVE_READLINKAT_RUNTIME (readlinkat != NULL)
-# endif
-
-# ifdef HAVE_SYMLINKAT
-# define HAVE_SYMLINKAT_RUNTIME (symlinkat != NULL)
-# endif
-
-# ifdef HAVE_UTIMENSAT
-# define HAVE_UTIMENSAT_RUNTIME (utimensat != NULL)
-# endif
-
-# ifdef HAVE_FUTIMENS
-# define HAVE_FUTIMENS_RUNTIME (futimens != NULL)
-# endif
-
-# ifdef HAVE_PWRITEV
-# define HAVE_PWRITEV_RUNTIME (pwritev != NULL)
-# endif
-
-# ifdef HAVE_MKFIFOAT
-# define HAVE_MKFIFOAT_RUNTIME (mkfifoat != NULL)
-# endif
-
-# ifdef HAVE_MKNODAT
-# define HAVE_MKNODAT_RUNTIME (mknodat != NULL)
-# endif
-
-# ifdef HAVE_PTSNAME_R
-# define HAVE_PTSNAME_R_RUNTIME (ptsname_r != NULL)
-# endif
-
-#endif
-
-#ifdef HAVE_FUTIMESAT
-/* Some of the logic for weak linking depends on this assertion */
-# error "HAVE_FUTIMESAT unexpectedly defined"
-#endif
-
-#else
-# define HAVE_FSTATAT_RUNTIME 1
-# define HAVE_FACCESSAT_RUNTIME 1
-# define HAVE_FCHMODAT_RUNTIME 1
-# define HAVE_FCHOWNAT_RUNTIME 1
-# define HAVE_LINKAT_RUNTIME 1
-# define HAVE_FDOPENDIR_RUNTIME 1
-# define HAVE_MKDIRAT_RUNTIME 1
-# define HAVE_RENAMEAT_RUNTIME 1
-# define HAVE_UNLINKAT_RUNTIME 1
-# define HAVE_OPENAT_RUNTIME 1
-# define HAVE_READLINKAT_RUNTIME 1
-# define HAVE_SYMLINKAT_RUNTIME 1
-# define HAVE_FUTIMENS_RUNTIME 1
-# define HAVE_UTIMENSAT_RUNTIME 1
-# define HAVE_PWRITEV_RUNTIME 1
-# define HAVE_MKFIFOAT_RUNTIME 1
-# define HAVE_MKNODAT_RUNTIME 1
-# define HAVE_PTSNAME_R_RUNTIME 1
+# include "emscripten.h" // emscripten_debugger()
#endif
-
-PyDoc_STRVAR(posix__doc__,
-"This module provides access to operating system functionality that is\n\
-standardized by the C Standard and the POSIX standard (a thinly\n\
-disguised Unix interface). Refer to the library manual and\n\
-corresponding Unix manual entries for more information on calls.");
-
-
#ifdef HAVE_SYS_UIO_H
# include <sys/uio.h>
#endif
#ifdef HAVE_SYS_TYPES_H
-/* Should be included before <sys/sysmacros.h> on HP-UX v3 */
+ /* Should be included before <sys/sysmacros.h> on HP-UX v3 */
# include <sys/types.h>
-#endif /* HAVE_SYS_TYPES_H */
-
+#endif
#ifdef HAVE_SYS_SYSMACROS_H
-/* GNU C Library: major(), minor(), makedev() */
+ /* GNU C Library: major(), minor(), makedev() */
# include <sys/sysmacros.h>
#endif
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
-#endif /* HAVE_SYS_STAT_H */
+#endif
#ifdef HAVE_SYS_WAIT_H
# include <sys/wait.h> // WNOHANG
#endif
+
#ifdef HAVE_LINUX_WAIT_H
# include <linux/wait.h> // P_PIDFD
#endif
#endif
#ifdef HAVE_FCNTL_H
-# include <fcntl.h>
+# include <fcntl.h> // fcntl()
#endif
#ifdef HAVE_GRP_H
-# include <grp.h>
+# include <grp.h> // setgroups()
#endif
#ifdef HAVE_SYSEXITS_H
-# include <sysexits.h>
+# include <sysexits.h> // EX_OK
#endif
#ifdef HAVE_SYS_LOADAVG_H
-# include <sys/loadavg.h>
+# include <sys/loadavg.h> // getloadavg()
#endif
#ifdef HAVE_SYS_SENDFILE_H
-# include <sys/sendfile.h>
+# include <sys/sendfile.h> // sendfile()
#endif
#if defined(__APPLE__)
-# include <copyfile.h>
+# include <copyfile.h> // fcopyfile()
#endif
#ifdef HAVE_SCHED_H
-# include <sched.h>
+# include <sched.h> // sched_setscheduler()
#endif
-
#ifdef HAVE_LINUX_SCHED_H
-# include <linux/sched.h>
-#endif
-
-#if !defined(CPU_ALLOC) && defined(HAVE_SCHED_SETAFFINITY)
-# undef HAVE_SCHED_SETAFFINITY
-#endif
-
-#if defined(HAVE_SYS_XATTR_H)
-# if defined(HAVE_LINUX_LIMITS_H) && !defined(__FreeBSD_kernel__) && !defined(__GNU__)
-# define USE_XATTRS
-# include <linux/limits.h> // Needed for XATTR_SIZE_MAX on musl libc.
-# endif
-# if defined(__CYGWIN__)
-# define USE_XATTRS
-# include <cygwin/limits.h> // Needed for XATTR_SIZE_MAX and XATTR_LIST_MAX.
-# endif
-#endif
-
-#ifdef USE_XATTRS
-# include <sys/xattr.h>
+# include <linux/sched.h> // SCHED_IDLE, SCHED_RR
#endif
#if defined(__FreeBSD__) || defined(__DragonFly__) || defined(__APPLE__)
#endif
#ifdef HAVE_LINUX_RANDOM_H
-# include <linux/random.h>
+# include <linux/random.h> // GRND_RANDOM
#endif
#ifdef HAVE_GETRANDOM_SYSCALL
-# include <sys/syscall.h>
+# include <sys/syscall.h> // syscall()
#endif
-#ifdef HAVE_WINDOWS_CONSOLE_IO
-# define TERMSIZE_USE_CONIO
-#elif defined(HAVE_SYS_IOCTL_H)
-# include <sys/ioctl.h>
-# if defined(HAVE_TERMIOS_H)
-# include <termios.h>
-# endif
-# if defined(TIOCGWINSZ)
-# define TERMSIZE_USE_IOCTL
-# endif
-#endif /* HAVE_WINDOWS_CONSOLE_IO */
+#ifdef HAVE_POSIX_SPAWN
+# include <spawn.h> // posix_spawn()
+#endif
-/* Various compilers have only certain posix functions */
-/* XXX Gosh I wish these were all moved into pyconfig.h */
-#if defined(__WATCOMC__) && !defined(__QNX__) /* Watcom compiler */
-# define HAVE_OPENDIR 1
-# define HAVE_SYSTEM 1
-# include <process.h>
-#elif defined( _MSC_VER)
- /* Microsoft compiler */
-# if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_APP) || defined(MS_WINDOWS_SYSTEM)
-# define HAVE_GETPPID 1
-# endif /* MS_WINDOWS_DESKTOP | MS_WINDOWS_APP | MS_WINDOWS_SYSTEM */
-# if defined(MS_WINDOWS_DESKTOP)
+#ifdef HAVE_UTIME_H
+# include <utime.h> // utime()
+#endif
+
+#ifdef HAVE_SYS_UTIME_H
+# include <sys/utime.h>
+# define HAVE_UTIME_H /* pretend we do for the rest of this file */
+#endif
+
+#ifdef HAVE_SYS_TIMES_H
+# include <sys/times.h> // times()
+#endif
+
+#ifdef HAVE_SYS_PARAM_H
+# include <sys/param.h>
+#endif
+
+#ifdef HAVE_SYS_UTSNAME_H
+# include <sys/utsname.h> // uname()
+#endif
+
+/* memfd_create is either defined in sys/mman.h or sys/memfd.h
+ * linux/memfd.h defines additional flags
+ */
+#ifdef HAVE_SYS_MMAN_H
+# include <sys/mman.h> // memfd_create()
+#endif
+#ifdef HAVE_SYS_MEMFD_H
+# include <sys/memfd.h> // memfd_create()
+#endif
+#ifdef HAVE_LINUX_MEMFD_H
+# include <linux/memfd.h> // memfd_create(), MFD_CLOEXEC
+#endif
+
+#ifdef HAVE_SYS_EVENTFD_H
+# include <sys/eventfd.h> // eventfd()
+#endif
+
+#ifdef HAVE_SYS_TIMERFD_H
+# include <sys/timerfd.h> // timerfd_create()
+#endif
+
+#ifdef _Py_MEMORY_SANITIZER
+# include <sanitizer/msan_interface.h> // __msan_unpoison()
+#endif
+
+
+// --- More complex system includes -----------------------------------------
+
+#ifdef MS_WINDOWS
+# include <windows.h>
+# if !defined(MS_WINDOWS_GAMES) || defined(MS_WINDOWS_DESKTOP)
+# include <pathcch.h> // PathCchSkipRoot()
+# endif
+# include <aclapi.h> // SetEntriesInAcl
+# include <lmcons.h> // UNLEN
+# include <sddl.h> // SDDL_REVISION_1
+# include <winioctl.h> // FSCTL_GET_REPARSE_POINT
+# if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)
+# define HAVE_SYMLINK
+# endif /* MS_WINDOWS_DESKTOP | MS_WINDOWS_SYSTEM */
+#endif
+
+
+#ifdef _MSC_VER
+# ifdef HAVE_DIRECT_H
+# include <direct.h>
+# endif
+# ifdef HAVE_IO_H
+# include <io.h>
+# endif
+# ifdef HAVE_PROCESS_H
+# include <process.h> // getpid(), _cwait()
+# endif
+# include <malloc.h>
+#endif /* _MSC_VER */
+
+
+#ifdef HAVE__GETPTY
+# include <sys/types.h> // mode_t
+ // SGI apparently needs this forward declaration
+ extern char * _getpty(int *, int, mode_t, int);
+#endif
+
+
+#if defined(HAVE_SYS_XATTR_H)
+# if defined(HAVE_LINUX_LIMITS_H) && !defined(__FreeBSD_kernel__) && !defined(__GNU__)
+# define USE_XATTRS
+# include <linux/limits.h> // Needed for XATTR_SIZE_MAX on musl libc.
+# endif
+# if defined(__CYGWIN__)
+# define USE_XATTRS
+# include <cygwin/limits.h> // Needed for XATTR_SIZE_MAX and XATTR_LIST_MAX.
+# endif
+#endif
+#ifdef USE_XATTRS
+# include <sys/xattr.h> // fgetxattr()
+#endif
+
+
+#ifdef HAVE_WINDOWS_CONSOLE_IO
+# define TERMSIZE_USE_CONIO
+#elif defined(HAVE_SYS_IOCTL_H)
+# include <sys/ioctl.h> // ioctl(), TIOCGWINSZ
+# if defined(HAVE_TERMIOS_H)
+# include <termios.h>
+# endif
+# if defined(TIOCGWINSZ)
+# define TERMSIZE_USE_IOCTL
+# endif
+#endif
+
+
+/* Various compilers have only certain posix functions */
+/* XXX Gosh I wish these were all moved into pyconfig.h */
+#if defined(__WATCOMC__) && !defined(__QNX__) /* Watcom compiler */
+# define HAVE_OPENDIR 1
+# define HAVE_SYSTEM 1
+# include <process.h>
+#elif defined( _MSC_VER)
+ /* Microsoft compiler */
+# if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_APP) || defined(MS_WINDOWS_SYSTEM)
+# define HAVE_GETPPID 1
+# endif /* MS_WINDOWS_DESKTOP | MS_WINDOWS_APP | MS_WINDOWS_SYSTEM */
+# if defined(MS_WINDOWS_DESKTOP)
# define HAVE_GETLOGIN 1
# endif /* MS_WINDOWS_DESKTOP */
# if defined(MS_WINDOWS_DESKTOP) || defined(MS_WINDOWS_SYSTEM)
# define HAVE_PIPE 1
# define HAVE_FSYNC 1
# define fsync _commit
-#endif /* ! __WATCOMC__ || __QNX__ */
-
-/*[clinic input]
-# one of the few times we lie about this name!
-module os
-[clinic start generated code]*/
-/*[clinic end generated code: output=da39a3ee5e6b4b0d input=94a0f0f978acae17]*/
+#endif
-#ifndef _MSC_VER
-#if defined(__sgi)&&_COMPILER_VERSION>=700
+#if !defined(_MSC_VER) && defined(__sgi) && _COMPILER_VERSION>=700
/* declare ctermid_r if compiling with MIPSPro 7.x in ANSI C mode
(default) */
-extern char *ctermid_r(char *);
+extern char *ctermid_r(char *);
#endif
-#endif /* !_MSC_VER */
#if defined(__VXWORKS__)
# include <vxCpuLib.h>
# endif
#endif /* __VXWORKS__ */
-#ifdef HAVE_POSIX_SPAWN
-# include <spawn.h>
-#endif
-
-#ifdef HAVE_UTIME_H
-# include <utime.h>
-#endif /* HAVE_UTIME_H */
-
-#ifdef HAVE_SYS_UTIME_H
-# include <sys/utime.h>
-# define HAVE_UTIME_H /* pretend we do for the rest of this file */
-#endif /* HAVE_SYS_UTIME_H */
-
-#ifdef HAVE_SYS_TIMES_H
-# include <sys/times.h>
-#endif /* HAVE_SYS_TIMES_H */
-
-#ifdef HAVE_SYS_PARAM_H
-# include <sys/param.h>
-#endif /* HAVE_SYS_PARAM_H */
-
-#ifdef HAVE_SYS_UTSNAME_H
-# include <sys/utsname.h>
-#endif /* HAVE_SYS_UTSNAME_H */
#ifdef HAVE_DIRENT_H
-# include <dirent.h>
+# include <dirent.h> // opendir()
# define NAMLEN(dirent) strlen((dirent)->d_name)
#else
# if defined(__WATCOMC__) && !defined(__QNX__)
# endif
#endif
-#ifdef _MSC_VER
-# ifdef HAVE_DIRECT_H
-# include <direct.h>
-# endif
-# ifdef HAVE_IO_H
-# include <io.h>
+
+#if defined(MAJOR_IN_MKDEV)
+# include <sys/mkdev.h>
+#else
+# if defined(MAJOR_IN_SYSMACROS)
+# include <sys/sysmacros.h>
# endif
-# ifdef HAVE_PROCESS_H
-# include <process.h>
+# if defined(HAVE_MKNOD) && defined(HAVE_SYS_MKDEV_H)
+# include <sys/mkdev.h>
# endif
-# include <malloc.h>
-#endif /* _MSC_VER */
+#endif
+
+
+// --- Macros ---------------------------------------------------------------
#ifndef MAXPATHLEN
# if defined(PATH_MAX) && PATH_MAX > 1024
# endif
#endif /* MAXPATHLEN */
+
#ifdef UNION_WAIT
/* Emulate some macros on systems that have a union instead of macros */
# ifndef WIFEXITED
# define WAIT_STATUS_INT(s) (s)
#endif /* UNION_WAIT */
+
/* Don't use the "_r" form if we don't need it (also, won't have a
prototype for it, at least on Solaris -- maybe others as well?). */
#if defined(HAVE_CTERMID_R)
# define USE_CTERMID_R
#endif
+
/* choose the appropriate stat and fstat functions and return structs */
#undef STAT
#undef FSTAT
# define STRUCT_STAT struct stat
#endif
-#if defined(MAJOR_IN_MKDEV)
-# include <sys/mkdev.h>
-#else
-# if defined(MAJOR_IN_SYSMACROS)
-# include <sys/sysmacros.h>
-# endif
-# if defined(HAVE_MKNOD) && defined(HAVE_SYS_MKDEV_H)
-# include <sys/mkdev.h>
-# endif
+
+#if !defined(EX_OK) && defined(EXIT_SUCCESS)
+# define EX_OK EXIT_SUCCESS
#endif
-#ifdef MS_WINDOWS
-# define INITFUNC PyInit_nt
-# define MODNAME "nt"
-# define MODNAME_OBJ &_Py_ID(nt)
-#else
-# define INITFUNC PyInit_posix
-# define MODNAME "posix"
-# define MODNAME_OBJ &_Py_ID(posix)
+#if !defined(CPU_ALLOC) && defined(HAVE_SCHED_SETAFFINITY)
+# undef HAVE_SCHED_SETAFFINITY
+#endif
+
+/* On android API level 21, 'AT_EACCESS' is not declared although
+ * HAVE_FACCESSAT is defined. */
+#ifdef __ANDROID__
+# undef HAVE_FACCESSAT
#endif
#if defined(__sun)
# define HAVE_STRUCT_STAT_ST_FSTYPE 1
#endif
-/* memfd_create is either defined in sys/mman.h or sys/memfd.h
- * linux/memfd.h defines additional flags
+
+// --- Apple __builtin_available() macros -----------------------------------
+
+/*
+ * A number of APIs are available on macOS from a certain macOS version.
+ * To support building with a new SDK while deploying to older versions
+ * the availability test is split into two:
+ * - HAVE_<FUNCTION>: The configure check for compile time availability
+ * - HAVE_<FUNCTION>_RUNTIME: Runtime check for availability
+ *
+ * The latter is always true when not on macOS, or when using a compiler
+ * that does not support __has_builtin (older versions of Xcode).
+ *
+ * Due to compiler restrictions there is one valid use of HAVE_<FUNCTION>_RUNTIME:
+ * if (HAVE_<FUNCTION>_RUNTIME) { ... }
+ *
+ * In mixing the test with other tests or using negations will result in compile
+ * errors.
*/
-#ifdef HAVE_SYS_MMAN_H
-# include <sys/mman.h>
+#if defined(__APPLE__)
+
+#include <mach/mach.h>
+
+#if defined(__has_builtin)
+#if __has_builtin(__builtin_available)
+#define HAVE_BUILTIN_AVAILABLE 1
#endif
-#ifdef HAVE_SYS_MEMFD_H
-# include <sys/memfd.h>
#endif
-#ifdef HAVE_LINUX_MEMFD_H
-# include <linux/memfd.h>
+
+#ifdef HAVE_BUILTIN_AVAILABLE
+# define HAVE_FSTATAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
+# define HAVE_FACCESSAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
+# define HAVE_FCHMODAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
+# define HAVE_FCHOWNAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
+# define HAVE_LINKAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
+# define HAVE_FDOPENDIR_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
+# define HAVE_MKDIRAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
+# define HAVE_RENAMEAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
+# define HAVE_UNLINKAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
+# define HAVE_OPENAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
+# define HAVE_READLINKAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
+# define HAVE_SYMLINKAT_RUNTIME __builtin_available(macOS 10.10, iOS 8.0, *)
+# define HAVE_FUTIMENS_RUNTIME __builtin_available(macOS 10.13, iOS 11.0, tvOS 11.0, watchOS 4.0, *)
+# define HAVE_UTIMENSAT_RUNTIME __builtin_available(macOS 10.13, iOS 11.0, tvOS 11.0, watchOS 4.0, *)
+# define HAVE_PWRITEV_RUNTIME __builtin_available(macOS 11.0, iOS 14.0, tvOS 14.0, watchOS 7.0, *)
+# define HAVE_MKFIFOAT_RUNTIME __builtin_available(macOS 13.0, iOS 16.0, tvOS 16.0, watchOS 9.0, *)
+# define HAVE_MKNODAT_RUNTIME __builtin_available(macOS 13.0, iOS 16.0, tvOS 16.0, watchOS 9.0, *)
+# define HAVE_PTSNAME_R_RUNTIME __builtin_available(macOS 10.13.4, iOS 11.3, tvOS 11.3, watchOS 4.3, *)
+
+# define HAVE_POSIX_SPAWN_SETSID_RUNTIME __builtin_available(macOS 10.15, *)
+
+#else /* Xcode 8 or earlier */
+
+ /* __builtin_available is not present in these compilers, but
+ * some of the symbols might be weak linked (10.10 SDK or later
+ * deploying on 10.9.
+ *
+ * Fall back to the older style of availability checking for
+ * symbols introduced in macOS 10.10.
+ */
+
+# ifdef HAVE_FSTATAT
+# define HAVE_FSTATAT_RUNTIME (fstatat != NULL)
+# endif
+
+# ifdef HAVE_FACCESSAT
+# define HAVE_FACCESSAT_RUNTIME (faccessat != NULL)
+# endif
+
+# ifdef HAVE_FCHMODAT
+# define HAVE_FCHMODAT_RUNTIME (fchmodat != NULL)
+# endif
+
+# ifdef HAVE_FCHOWNAT
+# define HAVE_FCHOWNAT_RUNTIME (fchownat != NULL)
+# endif
+
+# ifdef HAVE_LINKAT
+# define HAVE_LINKAT_RUNTIME (linkat != NULL)
+# endif
+
+# ifdef HAVE_FDOPENDIR
+# define HAVE_FDOPENDIR_RUNTIME (fdopendir != NULL)
+# endif
+
+# ifdef HAVE_MKDIRAT
+# define HAVE_MKDIRAT_RUNTIME (mkdirat != NULL)
+# endif
+
+# ifdef HAVE_RENAMEAT
+# define HAVE_RENAMEAT_RUNTIME (renameat != NULL)
+# endif
+
+# ifdef HAVE_UNLINKAT
+# define HAVE_UNLINKAT_RUNTIME (unlinkat != NULL)
+# endif
+
+# ifdef HAVE_OPENAT
+# define HAVE_OPENAT_RUNTIME (openat != NULL)
+# endif
+
+# ifdef HAVE_READLINKAT
+# define HAVE_READLINKAT_RUNTIME (readlinkat != NULL)
+# endif
+
+# ifdef HAVE_SYMLINKAT
+# define HAVE_SYMLINKAT_RUNTIME (symlinkat != NULL)
+# endif
+
+# ifdef HAVE_UTIMENSAT
+# define HAVE_UTIMENSAT_RUNTIME (utimensat != NULL)
+# endif
+
+# ifdef HAVE_FUTIMENS
+# define HAVE_FUTIMENS_RUNTIME (futimens != NULL)
+# endif
+
+# ifdef HAVE_PWRITEV
+# define HAVE_PWRITEV_RUNTIME (pwritev != NULL)
+# endif
+
+# ifdef HAVE_MKFIFOAT
+# define HAVE_MKFIFOAT_RUNTIME (mkfifoat != NULL)
+# endif
+
+# ifdef HAVE_MKNODAT
+# define HAVE_MKNODAT_RUNTIME (mknodat != NULL)
+# endif
+
+# ifdef HAVE_PTSNAME_R
+# define HAVE_PTSNAME_R_RUNTIME (ptsname_r != NULL)
+# endif
+
#endif
-/* eventfd() */
-#ifdef HAVE_SYS_EVENTFD_H
-# include <sys/eventfd.h>
+#ifdef HAVE_FUTIMESAT
+/* Some of the logic for weak linking depends on this assertion */
+# error "HAVE_FUTIMESAT unexpectedly defined"
#endif
-/* timerfd_create() */
-#ifdef HAVE_SYS_TIMERFD_H
-# include <sys/timerfd.h>
+#else
+# define HAVE_FSTATAT_RUNTIME 1
+# define HAVE_FACCESSAT_RUNTIME 1
+# define HAVE_FCHMODAT_RUNTIME 1
+# define HAVE_FCHOWNAT_RUNTIME 1
+# define HAVE_LINKAT_RUNTIME 1
+# define HAVE_FDOPENDIR_RUNTIME 1
+# define HAVE_MKDIRAT_RUNTIME 1
+# define HAVE_RENAMEAT_RUNTIME 1
+# define HAVE_UNLINKAT_RUNTIME 1
+# define HAVE_OPENAT_RUNTIME 1
+# define HAVE_READLINKAT_RUNTIME 1
+# define HAVE_SYMLINKAT_RUNTIME 1
+# define HAVE_FUTIMENS_RUNTIME 1
+# define HAVE_UTIMENSAT_RUNTIME 1
+# define HAVE_PWRITEV_RUNTIME 1
+# define HAVE_MKFIFOAT_RUNTIME 1
+# define HAVE_MKNODAT_RUNTIME 1
+# define HAVE_PTSNAME_R_RUNTIME 1
#endif
-#ifdef _Py_MEMORY_SANITIZER
-# include <sanitizer/msan_interface.h>
+
+// --- os module ------------------------------------------------------------
+
+#ifdef MS_WINDOWS
+# define INITFUNC PyInit_nt
+# define MODNAME "nt"
+# define MODNAME_OBJ &_Py_ID(nt)
+#else
+# define INITFUNC PyInit_posix
+# define MODNAME "posix"
+# define MODNAME_OBJ &_Py_ID(posix)
#endif
+/*[clinic input]
+# one of the few times we lie about this name!
+module os
+[clinic start generated code]*/
+/*[clinic end generated code: output=da39a3ee5e6b4b0d input=94a0f0f978acae17]*/
+
+PyDoc_STRVAR(posix__doc__,
+"This module provides access to operating system functionality that is\n\
+standardized by the C Standard and the POSIX standard (a thinly\n\
+disguised Unix interface). Refer to the library manual and\n\
+corresponding Unix manual entries for more information on calls.");
+
+
+// --- Functions ------------------------------------------------------------
+
#ifdef HAVE_FORK
static void
run_at_forkers(PyObject *lst, int reverse)
projects / thirdparty / Python / cpython.git / commitdiff
