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gh-96670: Raise SyntaxError when parsing NULL bytes (#97594)

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Pablo Galindo Salgado 2022-09-27 23:23:42 +01:00 • committed by GitHub
parent dd53b79de0
commit aab01e3524
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10 changed files with 65 additions and 21 deletions
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29
Objects/fileobject.c
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@ -230,16 +230,8 @@ _PyLong_FileDescriptor_Converter(PyObject *o, void *ptr)
return 1;
}
/*
** Py_UniversalNewlineFgets is an fgets variation that understands
** all of \r, \n and \r\n conventions.
** The stream should be opened in binary mode.
** The fobj parameter exists solely for legacy reasons and must be NULL.
** Note that we need no error handling: fgets() treats error and eof
** identically.
*/
char *
Py_UniversalNewlineFgets(char *buf, int n, FILE *stream, PyObject *fobj)
_Py_UniversalNewlineFgetsWithSize(char *buf, int n, FILE *stream, PyObject *fobj, size_t* size)
{
char *p = buf;
int c;
@ -265,11 +257,28 @@ Py_UniversalNewlineFgets(char *buf, int n, FILE *stream, PyObject *fobj)
}
FUNLOCKFILE(stream);
*p = '\0';
if (p == buf)
if (p == buf) {
return NULL;
}
*size = p - buf;
return buf;
}
/*
** Py_UniversalNewlineFgets is an fgets variation that understands
** all of \r, \n and \r\n conventions.
** The stream should be opened in binary mode.
** The fobj parameter exists solely for legacy reasons and must be NULL.
** Note that we need no error handling: fgets() treats error and eof
** identically.
*/
char *
Py_UniversalNewlineFgets(char *buf, int n, FILE *stream, PyObject *fobj) {
size_t size;
return _Py_UniversalNewlineFgetsWithSize(buf, n, stream, fobj, &size);
}
/* **************************** std printer ****************************
* The stdprinter is used during the boot strapping phase as a preliminary
* file like object for sys.stderr.