Issue #10095: fp_setreadl() doesn't reopen the file, reuse instead the file
descriptor.
diff --git a/Parser/tokenizer.c b/Parser/tokenizer.c
index 90b1b68..28dcea1 100644
--- a/Parser/tokenizer.c
+++ b/Parser/tokenizer.c
@@ -462,17 +462,20 @@
fp_setreadl(struct tok_state *tok, const char* enc)
{
PyObject *readline = NULL, *stream = NULL, *io = NULL;
+ int fd;
io = PyImport_ImportModuleNoBlock("io");
if (io == NULL)
goto cleanup;
- if (tok->filename)
- stream = PyObject_CallMethod(io, "open", "ssis",
- tok->filename, "r", -1, enc);
- else
- stream = PyObject_CallMethod(io, "open", "isisOOO",
- fileno(tok->fp), "r", -1, enc, Py_None, Py_None, Py_False);
+ fd = fileno(tok->fp);
+ if (lseek(fd, 0, SEEK_SET) == (off_t)-1) {
+ PyErr_SetFromErrnoWithFilename(PyExc_OSError, NULL);
+ goto cleanup;
+ }
+
+ stream = PyObject_CallMethod(io, "open", "isisOOO",
+ fd, "r", -1, enc, Py_None, Py_None, Py_False);
if (stream == NULL)
goto cleanup;