When reading hostname from NM keyfile, if no hostname is set, read from the
system file at /etc/conf.d/hostname to set hostname. This patch is not meant to
be ever upstreamed. Proper fix is to write a gentoo-specific ifcfg plugin.

To change hostname, touch nm-system-settings.conf, which will reload the keyfile
and cause /etc/conf.d/hostname to be reloaded.

This horrible hack fixes http://bugs.gentoo.org/176873

Author: Nirbheek Chauhan <nirbheek@gentoo.org>
Reviewed-by: Arun Raghavan <ford_prefect@gentoo.org>

---
--- system-settings/plugins/keyfile/plugin.c
+++ system-settings/plugins/keyfile/plugin.c
@@ -43,6 +43,9 @@
 #define KEYFILE_PLUGIN_INFO "(c) 2007 - 2008 Red Hat, Inc.  To report bugs please use the NetworkManager mailing list."
 
 #define CONF_FILE SYSCONFDIR "/NetworkManager/nm-system-settings.conf"
+#ifdef TARGET_GENTOO
+#define HOSTNAME_FILE SYSCONFDIR "/conf.d/hostname"
+#endif
 
 static char *plugin_get_hostname (SCPluginKeyfile *plugin);
 static void system_config_interface_init (NMSystemConfigInterface *system_config_interface_class);
@@ -381,6 +384,12 @@
 	GKeyFile *key_file;
 	char *hostname = NULL;
 	GError *error = NULL;
+#ifdef TARGET_GENTOO
+	char *contents = NULL;
+	char **lines = NULL, **line;
+	GError *contents_err = NULL;
+	gsize contents_len = 0;
+#endif
 
 	key_file = g_key_file_new ();
 	if (g_key_file_load_from_file (key_file, CONF_FILE, G_KEY_FILE_NONE, &error))
@@ -392,7 +401,37 @@
 
 	g_key_file_free (key_file);
 
+	if (hostname)
+		goto out;
+#ifdef TARGET_GENTOO
+	/* If hostname is unset in keyfile, read system file to get hostname */
+	if (!g_file_get_contents (HOSTNAME_FILE, &contents,
+				  &contents_len, &contents_err))
+		goto out;
+
+	lines = g_strsplit_set (contents, "\n\r", 0);
+	if (!lines)
+		goto out;
+
+	for (line = lines; *line; line++) {
+		if (!g_str_has_prefix (*line, "hostname="))
+			continue;
+		hostname = g_strsplit_set (g_strsplit_set (*line, "=", 0)[1], "#", 0)[0];
+		g_strstrip (hostname);
+		if (!hostname)
+			goto out;
+		/* Remove quotes surrounding hostname */
+		if (hostname[0] == '"' && hostname[strlen(hostname)-1] == '"')
+			contents = g_strndup(&hostname[1], strlen(hostname)-2);
+		/* Un-escape before using to imitate librc behaviour */
+		hostname = g_strcompress (contents);
+	}
+
+out:
+	g_error_free(contents_err);
+
 	return hostname;
+#endif
 }
 
 static gboolean