[libvirt] [PATCH 3/3] libvirt-domain: virConnectListDomains: Return 0 on zero-size buffer
It doesn't make sense to pass a target buffer into an API, declaring its
size as 0 and expect some meaningful result. Since this used to work
pre-Glib era, we shouldn't end with an error, but we can return 0
for the number of domains immediately, instead of calling into the
daemon, which is exactly what the daemon would have returned anyway.
Signed-off-by: Erik Skultety <eskultet(a)redhat.com>
---
src/libvirt-domain.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/src/libvirt-domain.c b/src/libvirt-domain.c
index 02622cb2ca..0def40fdf7 100644
--- a/src/libvirt-domain.c
+++ b/src/libvirt-domain.c
@@ -62,6 +62,9 @@ virConnectListDomains(virConnectPtr conn, int *ids, int maxids)
virCheckNonNullArgGoto(ids, error);
virCheckNonNegativeArgGoto(maxids, error);
+ if (maxids == 0)
+ return 0;
+
if (conn->driver->connectListDomains) {
int ret = conn->driver->connectListDomains(conn, ids, maxids);
if (ret < 0)
--
2.23.0