[libvirt] [PATCH] Make avahi startup more robust.

If the hostname of the current virtualization machine could not be resolved, then libvirtd would fail to start. However, for disconnected operation (on a laptop, for instance) the hostname may very legitimately not be resolvable. This patch makes it so that if we can't resolve the hostname, avahi doesn't fail, it just uses a less useful MDNS string. Signed-off-by: Chris Lalancette <clalance(a)redhat.com&gt; --- daemon/libvirtd.c | 28 ++++++++++++++++++++-------- 1 files changed, 20 insertions(+), 8 deletions(-) diff --git a/daemon/libvirtd.c b/daemon/libvirtd.c index 863bf21..4533f40 100644 --- a/daemon/libvirtd.c +++ b/daemon/libvirtd.c @@ -998,22 +998,34 @@ static int qemudNetworkInit(struct qemud_server *server) { struct libvirtd_mdns_group *group; struct qemud_socket *sock; int port = 0; + int ret; server->mdns = libvirtd_mdns_new(); if (!mdns_name) { - char groupname[64], *localhost, *tmp; - /* Extract the host part of the potentially FQDN */ + char *groupname, *localhost, *tmp; + localhost = virGetHostname(NULL); if (localhost == NULL) + /* we couldn't resolve the hostname; assume that we are + * running in disconnected operation, and report a less + * useful Avahi string + */ + ret = virAsprintf(&groupname, "Virtualization Host"); + else { + /* Extract the host part of the potentially FQDN */ + if ((tmp = strchr(localhost, '.'))) + *tmp = '\0'; + ret = virAsprintf(&groupname, "Virtualization Host %s", + localhost); + } + VIR_FREE(localhost); + if (ret < 0) { + virReportOOMError(); goto cleanup; - - if ((tmp = strchr(localhost, '.'))) - *tmp = '\0'; - snprintf(groupname, sizeof(groupname)-1, "Virtualization Host %s", localhost); - groupname[sizeof(groupname)-1] = '\0'; + } group = libvirtd_mdns_add_group(server->mdns, groupname); - VIR_FREE(localhost); + VIR_FREE(groupname); } else { group = libvirtd_mdns_add_group(server->mdns, mdns_name); } -- 1.6.6.1