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NetworkManager/rh831735-etc-hostname.patch

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From a7eb3476557dae28880333544c797705ee2f5b5a Mon Sep 17 00:00:00 2001
From: Dan Winship <danw@gnome.org>
Date: Tue, 19 Jun 2012 10:07:17 -0400
Subject: [PATCH] ifcfg-rh: /etc/hostname should override
/etc/sysconfig/network
When determining the system hostname, /etc/hostname should override
/etc/sysconfig/network, so monitor both files.
When setting the hostname, set it in /etc/hostname, and delete the
/etc/sysconfig/network HOSTNAME entry if present.
https://bugzilla.redhat.com/show_bug.cgi?id=831735
---
src/settings/plugins/ifcfg-rh/plugin.c | 130 ++++++++++++++++++++++++---------
1 file changed, 96 insertions(+), 34 deletions(-)
diff --git a/src/settings/plugins/ifcfg-rh/plugin.c b/src/settings/plugins/ifcfg-rh/plugin.c
index 04d5463..50cbdf0 100644
--- a/src/settings/plugins/ifcfg-rh/plugin.c
+++ b/src/settings/plugins/ifcfg-rh/plugin.c
@@ -80,10 +80,12 @@ typedef struct {
gulong ih_event_id;
int sc_network_wd;
+ GFileMonitor *hostname_monitor;
+ guint hostname_monitor_id;
char *hostname;
- GFileMonitor *monitor;
- guint monitor_id;
+ GFileMonitor *ifcfg_monitor;
+ guint ifcfg_monitor_id;
DBusGConnection *bus;
} SCPluginIfcfgPrivate;
@@ -325,11 +327,11 @@ connection_new_or_changed (SCPluginIfcfg *self,
}
static void
-dir_changed (GFileMonitor *monitor,
- GFile *file,
- GFile *other_file,
- GFileMonitorEvent event_type,
- gpointer user_data)
+ifcfg_dir_changed (GFileMonitor *monitor,
+ GFile *file,
+ GFile *other_file,
+ GFileMonitorEvent event_type,
+ gpointer user_data)
{
SCPluginIfcfg *plugin = SC_PLUGIN_IFCFG (user_data);
SCPluginIfcfgPrivate *priv = SC_PLUGIN_IFCFG_GET_PRIVATE (plugin);
@@ -379,8 +381,9 @@ setup_ifcfg_monitoring (SCPluginIfcfg *plugin)
g_object_unref (file);
if (monitor) {
- priv->monitor_id = g_signal_connect (monitor, "changed", G_CALLBACK (dir_changed), plugin);
- priv->monitor = monitor;
+ priv->ifcfg_monitor_id = g_signal_connect (monitor, "changed",
+ G_CALLBACK (ifcfg_dir_changed), plugin);
+ priv->ifcfg_monitor = monitor;
}
}
@@ -463,7 +466,8 @@ add_connection (NMSystemConfigInterface *config,
return (NMSettingsConnection *) added;
}
-#define SC_NETWORK_FILE SYSCONFDIR"/sysconfig/network"
+#define SC_NETWORK_FILE "/etc/sysconfig/network"
+#define HOSTNAME_FILE "/etc/hostname"
static char *
plugin_get_hostname (SCPluginIfcfg *plugin)
@@ -472,6 +476,11 @@ plugin_get_hostname (SCPluginIfcfg *plugin)
char *hostname;
gboolean ignore_localhost;
+ if (g_file_get_contents (HOSTNAME_FILE, &hostname, NULL, NULL)) {
+ g_strchomp (hostname);
+ return hostname;
+ }
+
network = svNewFile (SC_NETWORK_FILE);
if (!network) {
PLUGIN_WARN (IFCFG_PLUGIN_NAME, "Could not get hostname: failed to read " SC_NETWORK_FILE);
@@ -500,34 +509,31 @@ plugin_set_hostname (SCPluginIfcfg *plugin, const char *hostname)
SCPluginIfcfgPrivate *priv = SC_PLUGIN_IFCFG_GET_PRIVATE (plugin);
shvarFile *network;
- network = svCreateFile (SC_NETWORK_FILE);
- if (!network) {
- PLUGIN_WARN (IFCFG_PLUGIN_NAME, "Could not save hostname: failed to create/open " SC_NETWORK_FILE);
+ if (!g_file_set_contents (HOSTNAME_FILE, hostname, -1, NULL)) {
+ PLUGIN_WARN (IFCFG_PLUGIN_NAME, "Could not save hostname: failed to create/open " HOSTNAME_FILE);
return FALSE;
}
- svSetValue (network, "HOSTNAME", hostname, FALSE);
- svWriteFile (network, 0644);
- svCloseFile (network);
-
g_free (priv->hostname);
priv->hostname = g_strdup (hostname);
+
+ /* Remove "HOSTNAME" from SC_NETWORK_FILE, if present */
+ network = svNewFile (SC_NETWORK_FILE);
+ if (network) {
+ svSetValue (network, "HOSTNAME", NULL, FALSE);
+ svWriteFile (network, 0644);
+ svCloseFile (network);
+ }
+
return TRUE;
}
static void
-sc_network_changed_cb (NMInotifyHelper *ih,
- struct inotify_event *evt,
- const char *path,
- gpointer user_data)
+hostname_maybe_changed (SCPluginIfcfg *plugin)
{
- SCPluginIfcfg *plugin = SC_PLUGIN_IFCFG (user_data);
SCPluginIfcfgPrivate *priv = SC_PLUGIN_IFCFG_GET_PRIVATE (plugin);
char *new_hostname;
- if (evt->wd != priv->sc_network_wd)
- return;
-
new_hostname = plugin_get_hostname (plugin);
if ( (new_hostname && !priv->hostname)
|| (!new_hostname && priv->hostname)
@@ -539,6 +545,33 @@ sc_network_changed_cb (NMInotifyHelper *ih,
g_free (new_hostname);
}
+static void
+sc_network_changed_cb (NMInotifyHelper *ih,
+ struct inotify_event *evt,
+ const char *path,
+ gpointer user_data)
+{
+ SCPluginIfcfg *plugin = SC_PLUGIN_IFCFG (user_data);
+ SCPluginIfcfgPrivate *priv = SC_PLUGIN_IFCFG_GET_PRIVATE (plugin);
+
+ if (evt->wd != priv->sc_network_wd)
+ return;
+
+ hostname_maybe_changed (plugin);
+}
+
+static void
+hostname_changed_cb (GFileMonitor *monitor,
+ GFile *file,
+ GFile *other_file,
+ GFileMonitorEvent event_type,
+ gpointer user_data)
+{
+ SCPluginIfcfg *plugin = SC_PLUGIN_IFCFG (user_data);
+
+ hostname_maybe_changed (plugin);
+}
+
static gboolean
impl_ifcfgrh_get_ifcfg_details (SCPluginIfcfg *plugin,
const char *in_ifcfg,
@@ -614,11 +647,29 @@ sc_plugin_ifcfg_init (SCPluginIfcfg *plugin)
NMInotifyHelper *ih;
GError *error = NULL;
gboolean success = FALSE;
+ GFile *file;
+ GFileMonitor *monitor;
+
+ /* We watch SC_NETWORK_FILE via NMInotifyHelper (which doesn't track file creation but
+ * *does* track modifications made via other hard links), since we expect it to always
+ * exist. But we watch HOSTNAME_FILE via GFileMonitor (which has the opposite
+ * semantics), since /etc/hostname might not exist, but is unlikely to have hard
+ * links. bgo 532815 is the bug for being able to just use GFileMonitor for both.
+ */
ih = nm_inotify_helper_get ();
priv->ih_event_id = g_signal_connect (ih, "event", G_CALLBACK (sc_network_changed_cb), plugin);
priv->sc_network_wd = nm_inotify_helper_add_watch (ih, SC_NETWORK_FILE);
+ file = g_file_new_for_path (HOSTNAME_FILE);
+ monitor = g_file_monitor_file (file, G_FILE_MONITOR_NONE, NULL, NULL);
+ g_object_unref (file);
+ if (monitor) {
+ priv->hostname_monitor_id =
+ g_signal_connect (monitor, "changed", G_CALLBACK (hostname_changed_cb), plugin);
+ priv->hostname_monitor = monitor;
+ }
+
priv->hostname = plugin_get_hostname (plugin);
priv->bus = dbus_g_bus_get (DBUS_BUS_SYSTEM, &error);
@@ -674,24 +725,35 @@ dispose (GObject *object)
priv->bus = NULL;
}
- ih = nm_inotify_helper_get ();
+ if (priv->ih_event_id) {
+ ih = nm_inotify_helper_get ();
+
+ g_signal_handler_disconnect (ih, priv->ih_event_id);
+ priv->ih_event_id = 0;
- g_signal_handler_disconnect (ih, priv->ih_event_id);
+ if (priv->sc_network_wd >= 0)
+ nm_inotify_helper_remove_watch (ih, priv->sc_network_wd);
+ }
+
+ if (priv->hostname_monitor) {
+ if (priv->hostname_monitor_id)
+ g_signal_handler_disconnect (priv->hostname_monitor, priv->hostname_monitor_id);
- if (priv->sc_network_wd >= 0)
- nm_inotify_helper_remove_watch (ih, priv->sc_network_wd);
+ g_file_monitor_cancel (priv->hostname_monitor);
+ g_object_unref (priv->hostname_monitor);
+ }
g_free (priv->hostname);
if (priv->connections)
g_hash_table_destroy (priv->connections);
- if (priv->monitor) {
- if (priv->monitor_id)
- g_signal_handler_disconnect (priv->monitor, priv->monitor_id);
+ if (priv->ifcfg_monitor) {
+ if (priv->ifcfg_monitor_id)
+ g_signal_handler_disconnect (priv->ifcfg_monitor, priv->ifcfg_monitor_id);
- g_file_monitor_cancel (priv->monitor);
- g_object_unref (priv->monitor);
+ g_file_monitor_cancel (priv->ifcfg_monitor);
+ g_object_unref (priv->ifcfg_monitor);
}
G_OBJECT_CLASS (sc_plugin_ifcfg_parent_class)->dispose (object);
--
1.8.0
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