[Patch] Update /etc/resolv.conf on a stateless client

[Harald Hoyer <harald redhat com>]

Try to write to /etc/resolv.conf directly, it might be bind mounted on a stateless client.

-
Harald Hoyer <harald redhat com>

--- NetworkManager/src/named-manager/nm-named-manager.c	(revision 4295)
+++ NetworkManager/src/named-manager/nm-named-manager.c	(working copy)
@@ -332,18 +332,27 @@
 	const char *tmp_resolv_conf = RESOLV_CONF ".tmp";
 	char tmp_resolv_conf_realpath [PATH_MAX];
 	FILE *f;
+	int do_rename = 1;
+	int old_errno = 0;
 
 	if (!realpath(tmp_resolv_conf, tmp_resolv_conf_realpath))
 		strcpy(tmp_resolv_conf_realpath, tmp_resolv_conf);
 
 	if ((f = fopen (tmp_resolv_conf_realpath, "w")) == NULL) {
-		g_set_error (error,
-				   NM_NAMED_MANAGER_ERROR,
-				   NM_NAMED_MANAGER_ERROR_SYSTEM,
-				   "Could not open %s: %s\n",
-				   tmp_resolv_conf_realpath,
-				   g_strerror (errno));
-		return FALSE;
+		do_rename = 0;
+		old_errno = errno;
+		if ((f = (RESOLV_CONF, "w")) == NULL) {
+			g_set_error (error,
+					   NM_NAMED_MANAGER_ERROR,
+					   NM_NAMED_MANAGER_ERROR_SYSTEM,
+					   "Could not open %s: %s\nCould not open %s: %s\n",
+					   tmp_resolv_conf_realpath,
+					   g_strerror (old_errno);
+					   RESOLV_CONF,
+					   g_strerror (errno));
+			return FALSE;
+		}
+		strcpy(tmp_resolv_conf_realpath, RESOLV_CONF);
 	}
 
 	write_resolv_conf (f, domain, searches, nameservers, error);
@@ -359,7 +368,7 @@
 		}
 	}
 
-	if (*error == NULL) {
+	if (*error == NULL && do_rename) {
 		if (rename (tmp_resolv_conf, RESOLV_CONF) < 0) {
 			g_set_error (error,
 					   NM_NAMED_MANAGER_ERROR,