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patch 8.2.1830: MS-Windows: Python3 issue with stdin

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Problem:    MS-Windows: Python3 issue with stdin.
Solution:   Check if stdin is readable. (Ken Takata, closes #7106)
This commit is contained in:
Bram Moolenaar
2020-10-10 23:26:28 +02:00
parent bd6428b9e7
commit c6ed254d9f
2 changed files with 27 additions and 9 deletions
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34
src/if_python3.c
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@ -908,8 +908,27 @@ python3_loaded(void)
static wchar_t *py_home_buf = NULL;
#if defined(MSWIN) && (PY_VERSION_HEX >= 0x030500f0)
// Python 3.5 or later will abort inside Py_Initialize() when stdin is
// redirected. Reconnect stdin to NUL.
/*
* Return TRUE if stdin is readable from Python 3.
*/
static BOOL
is_stdin_readable(void)
{
DWORD mode, eventnum;
struct _stat st;
int fd = fileno(stdin);
HANDLE hstdin = (HANDLE)_get_osfhandle(fd);
// Check if stdin is connected to the console.
if (GetConsoleMode(hstdin, &mode))
// Check if it is opened as input.
return GetNumberOfConsoleInputEvents(hstdin, &eventnum);
return _fstat(fd, &st) == 0;
}
// Python 3.5 or later will abort inside Py_Initialize() when stdin has
// been closed (i.e. executed by "vim -"). Reconnect stdin to CONIN$.
// Note that the python DLL is linked to its own stdio DLL which can be
// differ from Vim's stdio.
static void
@ -917,7 +936,6 @@ reset_stdin(void)
{
FILE *(*py__acrt_iob_func)(unsigned) = NULL;
FILE *(*pyfreopen)(const char *, const char *, FILE *) = NULL;
char *stdin_name = "NUL";
HINSTANCE hinst;
# ifdef DYNAMIC_PYTHON3
@ -925,7 +943,7 @@ reset_stdin(void)
# else
hinst = GetModuleHandle(PYTHON3_DLL);
# endif
if (hinst == NULL)
if (hinst == NULL || is_stdin_readable())
return;
// Get "freopen" and "stdin" which are used in the python DLL.
@ -938,14 +956,12 @@ reset_stdin(void)
if (hpystdiodll)
pyfreopen = (void *)GetProcAddress(hpystdiodll, "freopen");
}
if (isatty(fileno(stdin)))
stdin_name = "CONIN$";
// Reconnect stdin to NUL or CONIN$.
// Reconnect stdin to CONIN$.
if (pyfreopen != NULL)
pyfreopen(stdin_name, "r", py__acrt_iob_func(0));
pyfreopen("CONIN$", "r", py__acrt_iob_func(0));
else
freopen(stdin_name, "r", stdin);
freopen("CONIN$", "r", stdin);
}
#else
# define reset_stdin()

2
src/version.c
View File

@ -750,6 +750,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
1830,
/**/
1829,
/**/