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bpo-37549: os.dup() fails for standard streams on Windows 7 (GH-15389)

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(cherry picked from commit 5be666010e)

Co-authored-by: Zackery Spytz <zspytz@gmail.com>
This commit is contained in:
Miss Islington (bot) 2019-08-23 12:04:27 -07:00 • committed by GitHub
parent 761e5a7c7f
commit 3921d12174
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3 changed files with 14 additions and 1 deletions
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9
Python/fileutils.c
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@ -1134,11 +1134,18 @@ set_inheritable(int fd, int inheritable, int raise, int *atomic_flag_works)
flags = HANDLE_FLAG_INHERIT;
else
flags = 0;
if (!SetHandleInformation(handle, HANDLE_FLAG_INHERIT, flags)) {
/* This check can be removed once support for Windows 7 ends. */
#define CONSOLE_PSEUDOHANDLE(handle) (((ULONG_PTR)(handle) & 0x3) == 0x3 && \
GetFileType(handle) == FILE_TYPE_CHAR)
if (!CONSOLE_PSEUDOHANDLE(handle) &&
!SetHandleInformation(handle, HANDLE_FLAG_INHERIT, flags)) {
if (raise)
PyErr_SetFromWindowsErr(0);
return -1;
}
#undef CONSOLE_PSEUDOHANDLE
return 0;
#else