Re: [PATCH] plugin python: Adjust the handling after PyRun_String() failed

From: Steven Rostedt
Date: Thu Apr 27 2017 - 07:30:56 EST


On Thu, 27 Apr 2017 11:52:14 +0900
Taeung Song <treeze.taeung@xxxxxxxxx> wrote:

> On 04/27/2017 11:47 AM, Steven Rostedt wrote:
> > On Thu, 27 Apr 2017 08:46:21 +0900
> > Taeung Song <treeze.taeung@xxxxxxxxx> wrote:
> >
> >> Even though PyRun_String() failed,
> >> just 0 will be returned but we need to return -1
> >> that means error status, so fix it.
> >>
> >> Signed-off-by: Taeung Song <treeze.taeung@xxxxxxxxx>
> >> ---
> >> plugin_python.c | 5 +++--
> >> 1 file changed, 3 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/plugin_python.c b/plugin_python.c
> >> index 2997679..dcfad0f 100644
> >> --- a/plugin_python.c
> >> +++ b/plugin_python.c
> >> @@ -24,7 +24,7 @@ static int load_plugin(struct pevent *pevent, const char *path,
> >> const char *name, void *data)
> >> {
> >> PyObject *globals = data;
> >> - int err;
> >> + int err, ret = 0;
> >
> > Hmm, we can either reuse err.
> >
>
> But return value of asprintf() can be more 1,
> when it succeeded.
> So I think it is better the below you said.

What I meant was to simply reset err = 0; and set it if we failed and
returned that. No need to add more variables.

>
> >> int len = strlen(path) + strlen(name) + 2;
> >> int nlen = strlen(name) + 1;
> >> char *full = malloc(len);
> >> @@ -50,12 +50,13 @@ static int load_plugin(struct pevent *pevent, const char *path,
> >> if (!res) {
> >> fprintf(stderr, "failed loading %s\n", full);
> >> PyErr_Print();
> >> + ret = -1;
> >> } else
> >> Py_DECREF(res);
> >>
> >> free(load);
> >>
> >> - return 0;
> >> + return ret;
> >
> > or do a: return res ? 0 : -1;
> >
> > -- Steve
> >
>
> Okey! I'll resent the patch after modifying this!

But this is fine as well.

-- Steve