Blame SOURCES/0010-Allow-saved-session-directory-to-be-a-symlink.patch

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From 617844d602dd35aceb393b803ed76b15dc125983 Mon Sep 17 00:00:00 2001
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From: Ray Strode <rstrode@redhat.com>
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Date: Fri, 20 Dec 2013 11:22:53 -0500
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Subject: [PATCH 10/19] Allow saved-session directory to be a symlink
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This gives us the option of adding a rudimentary session
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chooser later.
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---
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 gnome-session/gsm-session-save.c | 36 ++++++++++++++++++++++++++------
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 gnome-session/gsm-util.c         |  6 ------
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 2 files changed, 30 insertions(+), 12 deletions(-)
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diff --git a/gnome-session/gsm-session-save.c b/gnome-session/gsm-session-save.c
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index 04b5277c..7cbc72fe 100644
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--- a/gnome-session/gsm-session-save.c
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+++ b/gnome-session/gsm-session-save.c
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@@ -167,67 +167,91 @@ gsm_session_save (GsmStore  *client_store,
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          */
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         settings = g_settings_new (GSM_MANAGER_SCHEMA);
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         g_settings_set_boolean (settings, KEY_AUTOSAVE_ONE_SHOT, FALSE);
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         g_object_unref (settings);
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         save_dir = gsm_util_get_saved_session_dir ();
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         if (save_dir == NULL) {
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                 g_warning ("GsmSessionSave: cannot create saved session directory");
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                 return;
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         }
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         tmp_dir = gsm_util_get_empty_tmp_session_dir ();
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         if (tmp_dir == NULL) {
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                 g_warning ("GsmSessionSave: cannot create new saved session directory");
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                 return;
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         }
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         /* save the session in a temp directory, and remember the discard
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          * commands */
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         data.dir = tmp_dir;
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         data.discard_hash = g_hash_table_new_full (g_str_hash, g_str_equal,
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                                                    g_free, NULL);
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         data.app_store = app_store;
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         data.error = error;
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         gsm_store_foreach (client_store,
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                            (GsmStoreFunc) save_one_client,
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                            &data);
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         if (!*error) {
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-                /* remove the old saved session */
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-                gsm_session_clear_saved_session (save_dir, data.discard_hash);
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+                char *session_dir;
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-                /* rename the temp session dir */
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-                if (g_file_test (save_dir, G_FILE_TEST_IS_DIR))
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-                        g_rmdir (save_dir);
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-                g_rename (tmp_dir, save_dir);
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+                if (g_file_test (save_dir, G_FILE_TEST_IS_SYMLINK))
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+                        session_dir = g_file_read_link (save_dir, error);
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+                else
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+                        session_dir = g_strdup (save_dir);
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+
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+                if (session_dir != NULL) {
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+
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+                        char *absolute_session_dir;
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+
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+                        if (g_path_is_absolute (session_dir)) {
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+                                absolute_session_dir = g_strdup (session_dir);
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+                        } else {
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+                                char *parent_dir;
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+
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+                                parent_dir = g_path_get_dirname (save_dir);
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+                                absolute_session_dir = g_build_filename (parent_dir, session_dir, NULL);
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+                                g_free (parent_dir);
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+                        }
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+                        g_free (session_dir);
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+
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+                        /* remove the old saved session */
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+                        gsm_session_clear_saved_session (absolute_session_dir, data.discard_hash);
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+
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+                        if (g_file_test (absolute_session_dir, G_FILE_TEST_IS_DIR))
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+                                g_rmdir (absolute_session_dir);
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+                        g_rename (tmp_dir, absolute_session_dir);
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+
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+                        g_free (absolute_session_dir);
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+                }
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         } else {
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                 g_warning ("GsmSessionSave: error saving session: %s", (*error)->message);
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                 /* FIXME: we should create a hash table filled with the discard
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                  * commands that are in desktop files from save_dir. */
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                 gsm_session_clear_saved_session (tmp_dir, NULL);
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                 g_rmdir (tmp_dir);
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         }
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         g_hash_table_destroy (data.discard_hash);
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         g_free (tmp_dir);
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 }
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 static gboolean
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 gsm_session_clear_one_client (const char *filename,
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                               GHashTable *discard_hash)
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 {
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         gboolean  result = TRUE;
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         GKeyFile *key_file;
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         char     *discard_exec = NULL;
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         char    **envp;
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         g_debug ("GsmSessionSave: removing '%s' from saved session", filename);
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         envp = (char **) gsm_util_listenv ();
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         key_file = g_key_file_new ();
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         if (g_key_file_load_from_file (key_file, filename,
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                                        G_KEY_FILE_NONE, NULL)) {
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                 char **argv;
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                 int    argc;
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diff --git a/gnome-session/gsm-util.c b/gnome-session/gsm-util.c
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index b086568c..acb446a3 100644
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--- a/gnome-session/gsm-util.c
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+++ b/gnome-session/gsm-util.c
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@@ -71,69 +71,63 @@ gsm_util_find_desktop_file_for_app_name (const char *name,
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                 g_debug ("GsmUtil: found in XDG dirs: '%s'", app_path);
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         }
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         /* look for gnome vendor prefix */
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         if (app_path == NULL) {
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                 g_free (desktop_file);
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                 desktop_file = g_strdup_printf ("gnome-%s.desktop", name);
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                 g_key_file_load_from_dirs (key_file,
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                                            desktop_file,
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                                            (const char **) app_dirs,
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                                            &app_path,
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                                            G_KEY_FILE_NONE,
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                                            NULL);
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                 if (app_path != NULL) {
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                         g_debug ("GsmUtil: found in XDG dirs: '%s'", app_path);
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                 }
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         }
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         g_free (desktop_file);
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         g_key_file_free (key_file);
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         g_strfreev (app_dirs);
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         return app_path;
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 }
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 static gboolean
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 ensure_dir_exists (const char *dir)
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 {
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-        if (g_file_test (dir, G_FILE_TEST_IS_DIR))
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-                return TRUE;
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-
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         if (g_mkdir_with_parents (dir, 0700) == 0)
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                 return TRUE;
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-        if (errno == EEXIST)
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-                return g_file_test (dir, G_FILE_TEST_IS_DIR);
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-
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         g_warning ("GsmSessionSave: Failed to create directory %s: %s", dir, strerror (errno));
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         return FALSE;
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 }
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 gchar *
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 gsm_util_get_empty_tmp_session_dir (void)
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 {
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         char *tmp;
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         gboolean exists;
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         tmp = g_build_filename (g_get_user_config_dir (),
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                                 "gnome-session",
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                                 "saved-session.new",
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                                 NULL);
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         exists = ensure_dir_exists (tmp);
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         if (G_UNLIKELY (!exists)) {
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                 g_warning ("GsmSessionSave: could not create directory for saved session: %s", tmp);
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                 g_free (tmp);
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                 return NULL;
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         } else {
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                 /* make sure it's empty */
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                 GDir       *dir;
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                 const char *filename;
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                 dir = g_dir_open (tmp, 0, NULL);
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                 if (dir) {
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                         while ((filename = g_dir_read_name (dir))) {
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-- 
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2.17.0
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