[gvfs] gvfs-mount: Allow mounting as an anonymous user

[Ross Lagerwall <rossl src gnome org>]

commit 0803c0fdc5bfd6d9f188088643aa2bc078c4ca36
Author: Ross Lagerwall <rosslagerwall gmail com>
Date:   Thu Jan 1 10:15:46 2015 +0200

    gvfs-mount: Allow mounting as an anonymous user
    
    https://bugzilla.gnome.org/show_bug.cgi?id=742169

 man/gvfs-mount.xml    |    6 ++++
 programs/gvfs-mount.c |   76 ++++++++++++++++++++++++++++++++++++-------------
 2 files changed, 62 insertions(+), 20 deletions(-)
---
diff --git a/man/gvfs-mount.xml b/man/gvfs-mount.xml
index 64b7c37..a0c4738 100644
--- a/man/gvfs-mount.xml
+++ b/man/gvfs-mount.xml
@@ -118,6 +118,12 @@
                         </varlistentry>
 
                         <varlistentry>
+                                <term><option>-a</option>, <option>--anonymous</option></term>
+
+                                <listitem><para>Use an anonymous user when authenticating</para></listitem>
+                        </varlistentry>
+
+                        <varlistentry>
                                 <term><option>-l</option>, <option>--list</option></term>
 
                                 <listitem><para>List all known mounts.</para></listitem>
diff --git a/programs/gvfs-mount.c b/programs/gvfs-mount.c
index 96abaa2..dd31e30 100644
--- a/programs/gvfs-mount.c
+++ b/programs/gvfs-mount.c
@@ -38,6 +38,12 @@
 
 #define STDIN_FILENO 0
 
+typedef enum {
+  MOUNT_OP_NONE,
+  MOUNT_OP_ASKED,
+  MOUNT_OP_ABORTED
+} MountOpState;
+
 static int outstanding_mounts = 0;
 static GMainLoop *main_loop;
 
@@ -46,6 +52,7 @@ static gboolean mount_mountable = FALSE;
 static gboolean mount_unmount = FALSE;
 static gboolean mount_eject = FALSE;
 static gboolean force = FALSE;
+static gboolean anonymous = FALSE;
 static gboolean mount_list = FALSE;
 static gboolean extra_detail = FALSE;
 static gboolean mount_monitor = FALSE;
@@ -63,6 +70,7 @@ static const GOptionEntry entries[] =
   { "eject", 'e', 0, G_OPTION_ARG_NONE, &mount_eject, N_("Eject"), NULL},
   { "unmount-scheme", 's', 0, G_OPTION_ARG_STRING, &unmount_scheme, N_("Unmount all mounts with the given 
scheme"), N_("SCHEME") },
   { "force", 'f', 0, G_OPTION_ARG_NONE, &force, N_("Ignore outstanding file operations when unmounting or 
ejecting"), NULL },
+  { "anonymous", 'a', 0, G_OPTION_ARG_NONE, &anonymous, N_("Use an anonymous user when authenticating"), 
NULL },
   /* Translator: List here is a verb as in 'List all mounts' */
   { "list", 'l', 0, G_OPTION_ARG_NONE, &mount_list, N_("List"), NULL},
   { "monitor", 'o', 0, G_OPTION_ARG_NONE, &mount_monitor, N_("Monitor events"), NULL},
@@ -132,31 +140,49 @@ ask_password_cb (GMountOperation *op,
                  const char      *default_domain,
                  GAskPasswordFlags flags)
 {
-  char *s;
-  g_print ("%s\n", message);
-
-  if (flags & G_ASK_PASSWORD_NEED_USERNAME)
+  if ((flags & G_ASK_PASSWORD_ANONYMOUS_SUPPORTED) && anonymous)
     {
-      s = prompt_for ("User", default_user, TRUE);
-      g_mount_operation_set_username (op, s);
-      g_free (s);
+      g_mount_operation_set_anonymous (op, TRUE);
     }
-
-  if (flags & G_ASK_PASSWORD_NEED_DOMAIN)
+  else
     {
-      s = prompt_for ("Domain", default_domain, TRUE);
-      g_mount_operation_set_domain (op, s);
-      g_free (s);
+      char *s;
+      g_print ("%s\n", message);
+
+      if (flags & G_ASK_PASSWORD_NEED_USERNAME)
+        {
+          s = prompt_for ("User", default_user, TRUE);
+          g_mount_operation_set_username (op, s);
+          g_free (s);
+        }
+
+      if (flags & G_ASK_PASSWORD_NEED_DOMAIN)
+        {
+          s = prompt_for ("Domain", default_domain, TRUE);
+          g_mount_operation_set_domain (op, s);
+          g_free (s);
+        }
+
+      if (flags & G_ASK_PASSWORD_NEED_PASSWORD)
+        {
+          s = prompt_for ("Password", NULL, FALSE);
+          g_mount_operation_set_password (op, s);
+          g_free (s);
+        }
     }
 
-  if (flags & G_ASK_PASSWORD_NEED_PASSWORD)
+  /* Only try anonymous access once. */
+  if (anonymous &&
+      GPOINTER_TO_INT (g_object_get_data (G_OBJECT (op), "state")) == MOUNT_OP_ASKED)
     {
-      s = prompt_for ("Password", NULL, FALSE);
-      g_mount_operation_set_password (op, s);
-      g_free (s);
+      g_object_set_data (G_OBJECT (op), "state", GINT_TO_POINTER (MOUNT_OP_ABORTED));
+      g_mount_operation_reply (op, G_MOUNT_OPERATION_ABORTED);
+    }
+  else
+    {
+      g_object_set_data (G_OBJECT (op), "state", GINT_TO_POINTER (MOUNT_OP_ASKED));
+      g_mount_operation_reply (op, G_MOUNT_OPERATION_HANDLED);
     }
-
-  g_mount_operation_reply (op, G_MOUNT_OPERATION_HANDLED);
 }
 
 static void
@@ -195,13 +221,17 @@ mount_mountable_done_cb (GObject *object,
 {
   GFile *target;
   GError *error = NULL;
+  GMountOperation *op = user_data;
 
   target = g_file_mount_mountable_finish (G_FILE (object), res, &error);
 
   if (target == NULL)
     {
-      g_printerr (_("Error mounting location: %s\n"), error->message);
       success = FALSE;
+      if (GPOINTER_TO_INT (g_object_get_data (G_OBJECT (op), "state")) == MOUNT_OP_ABORTED)
+        g_printerr (_("Error mounting location: Anonymous access denied\n"));
+      else
+        g_printerr (_("Error mounting location: %s\n"), error->message);
     }
   else
     g_object_unref (target);
@@ -219,13 +249,17 @@ mount_done_cb (GObject *object,
 {
   gboolean succeeded;
   GError *error = NULL;
+  GMountOperation *op = user_data;
 
   succeeded = g_file_mount_enclosing_volume_finish (G_FILE (object), res, &error);
 
   if (!succeeded)
     {
-      g_printerr (_("Error mounting location: %s\n"), error->message);
       success = FALSE;
+      if (GPOINTER_TO_INT (g_object_get_data (G_OBJECT (op), "state")) == MOUNT_OP_ABORTED)
+        g_printerr (_("Error mounting location: Anonymous access denied\n"));
+      else
+        g_printerr (_("Error mounting location: %s\n"), error->message);
     }
 
   outstanding_mounts--;
@@ -241,6 +275,8 @@ new_mount_op (void)
 
   op = g_mount_operation_new ();
 
+  g_object_set_data (G_OBJECT (op), "state", GINT_TO_POINTER (MOUNT_OP_NONE));
+
   g_signal_connect (op, "ask_password", G_CALLBACK (ask_password_cb), NULL);
   g_signal_connect (op, "ask_question", G_CALLBACK (ask_question_cb), NULL);