From: Bartosz Golaszewski <bartekgola@gmail.com>
Date: Sat, 12 May 2018 12:48:58 +0000 (+0200)
Subject: bindings: python: return None if line can't be found by name
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=d331321f010b07ec6646c3effa490655ecab624c;p=qemu-gpiodev%2Flibgpiod.git

bindings: python: return None if line can't be found by name

For both find_line() variants (Chip's method and global function)
return None if the internal call to the C find_line function fails
with ENOENT. This is not an error so don't raise an exception.

Signed-off-by: Bartosz Golaszewski <bartekgola@gmail.com>
---

diff --git a/bindings/python/gpiodmodule.c b/bindings/python/gpiodmodule.c
index 8e36ec8..9248616 100644
--- a/bindings/python/gpiodmodule.c
+++ b/bindings/python/gpiodmodule.c
@@ -1291,6 +1291,11 @@ gpiod_Chip_find_line(gpiod_ChipObject *self, PyObject *args)
 	line = gpiod_chip_find_line(self->chip, name);
 	Py_END_ALLOW_THREADS;
 	if (!line) {
+		if (errno == ENOENT) {
+			Py_INCREF(Py_None);
+			return (gpiod_LineObject *)Py_None;
+		}
+
 		PyErr_SetFromErrno(PyExc_OSError);
 		return NULL;
 	}
@@ -1573,6 +1578,11 @@ static gpiod_LineObject *gpiod_Module_find_line(PyObject *self GPIOD_UNUSED,
 	line = gpiod_line_find(name);
 	Py_END_ALLOW_THREADS;
 	if (!line) {
+		if (errno == ENOENT) {
+			Py_INCREF(Py_None);
+			return (gpiod_LineObject *)Py_None;
+		}
+
 		PyErr_SetFromErrno(PyExc_OSError);
 		return NULL;
 	}