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bpo-29176: curses: use tmpfile() for getwin/putwin #237

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bpo-29176: curses: use tmpfile() for getwin/putwin #237

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49 changes: 16 additions & 33 deletions Modules/_cursesmodule.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1720,22 +1720,18 @@ PyCursesWindow_PutWin(PyCursesWindowObject *self, PyObject *stream)
{
/* We have to simulate this by writing to a temporary FILE*,
then reading back, then writing to the argument stream. */
char fn[100];
int fd = -1;
FILE *fp = NULL;
FILE *fp;
PyObject *res = NULL;

strcpy(fn, "/tmp/py.curses.putwin.XXXXXX");
fd = mkstemp(fn);
if (fd < 0)
return PyErr_SetFromErrnoWithFilename(PyExc_IOError, fn);
if (_Py_set_inheritable(fd, 0, NULL) < 0)
goto exit;
fp = fdopen(fd, "wb+");
fp = tmpfile();
if (fp == NULL) {
PyErr_SetFromErrnoWithFilename(PyExc_IOError, fn);
PyErr_SetFromErrno(PyExc_OSError);
return NULL;
}
if (_Py_set_inheritable(fileno(fp), 0, NULL) < 0) {
goto exit;
}

res = PyCursesCheckERR(putwin(self->win, fp), "putwin");
if (res == NULL)
goto exit;
Expand All @@ -1754,11 +1750,7 @@ PyCursesWindow_PutWin(PyCursesWindowObject *self, PyObject *stream)
}

exit:
if (fp != NULL)
fclose(fp);
else if (fd != -1)
close(fd);
remove(fn);
fclose(fp);
return res;
}

Expand Down Expand Up @@ -2278,9 +2270,7 @@ PyCurses_UngetMouse(PyObject *self, PyObject *args)
static PyObject *
PyCurses_GetWin(PyCursesWindowObject *self, PyObject *stream)
{
char fn[100];
int fd = -1;
FILE *fp = NULL;
FILE *fp;
PyObject *data;
size_t datalen;
WINDOW *win;
Expand All @@ -2289,15 +2279,12 @@ PyCurses_GetWin(PyCursesWindowObject *self, PyObject *stream)

PyCursesInitialised;

strcpy(fn, "/tmp/py.curses.getwin.XXXXXX");
fd = mkstemp(fn);
if (fd < 0)
return PyErr_SetFromErrnoWithFilename(PyExc_IOError, fn);
if (_Py_set_inheritable(fd, 0, NULL) < 0)
goto error;
fp = fdopen(fd, "wb+");
fp = tmpfile();
if (fp == NULL) {
PyErr_SetFromErrnoWithFilename(PyExc_IOError, fn);
PyErr_SetFromErrno(PyExc_OSError);
return NULL;
}
if (_Py_set_inheritable(fileno(fp), 0, NULL) < 0) {
goto error;
}

Expand All @@ -2314,7 +2301,7 @@ PyCurses_GetWin(PyCursesWindowObject *self, PyObject *stream)
datalen = PyBytes_GET_SIZE(data);
if (fwrite(PyBytes_AS_STRING(data), 1, datalen, fp) != datalen) {
Py_DECREF(data);
PyErr_SetFromErrnoWithFilename(PyExc_IOError, fn);
PyErr_SetFromErrno(PyExc_OSError);
goto error;
}
Py_DECREF(data);
Expand All @@ -2328,11 +2315,7 @@ PyCurses_GetWin(PyCursesWindowObject *self, PyObject *stream)
res = PyCursesWindow_New(win, NULL);

error:
if (fp != NULL)
fclose(fp);
else if (fd != -1)
close(fd);
remove(fn);
fclose(fp);
return res;
}

Expand Down