moving from https://github.com/perberos/mate-desktop-environment

1 files changed, 505 insertions, 0 deletions

diff --git a/mate-session/gsm-util.c b/mate-session/gsm-util.c
new file mode 100644
index 0000000..5d2983e
--- /dev/null
+++ b/mate-session/gsm-util.c
@@ -0,0 +1,505 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ * gsm-util.c
+ * Copyright (C) 2008 Lucas Rocha.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <errno.h>
+#include <string.h>
+
+#include <glib.h>
+#include <glib/gi18n.h>
+#include <glib/gstdio.h>
+#include <gtk/gtk.h>
+
+#include <dbus/dbus-glib.h>
+
+#include "gsm-util.h"
+
+static gchar *_saved_session_dir = NULL;
+
+char *
+gsm_util_find_desktop_file_for_app_name (const char *name,
+                                         char      **autostart_dirs)
+{
+        char     *app_path;
+        char    **app_dirs;
+        GKeyFile *key_file;
+        char     *desktop_file;
+        int       i;
+
+        app_path = NULL;
+
+        app_dirs = gsm_util_get_app_dirs ();
+
+        key_file = g_key_file_new ();
+
+        desktop_file = g_strdup_printf ("%s.desktop", name);
+
+        g_debug ("GsmUtil: Looking for file '%s'", desktop_file);
+
+        for (i = 0; app_dirs[i] != NULL; i++) {
+                g_debug ("GsmUtil: Looking in '%s'", app_dirs[i]);
+        }
+
+        g_key_file_load_from_dirs (key_file,
+                                   desktop_file,
+                                   (const char **) app_dirs,
+                                   &app_path,
+                                   G_KEY_FILE_NONE,
+                                   NULL);
+
+        if (app_path != NULL) {
+                g_debug ("GsmUtil: found in XDG app dirs: '%s'", app_path);
+        }
+
+        if (app_path == NULL && autostart_dirs != NULL) {
+                g_key_file_load_from_dirs (key_file,
+                                           desktop_file,
+                                           (const char **) autostart_dirs,
+                                           &app_path,
+                                           G_KEY_FILE_NONE,
+                                           NULL);
+                if (app_path != NULL) {
+                        g_debug ("GsmUtil: found in autostart dirs: '%s'", app_path);
+                }
+
+        }
+
+        /* look for mate vender prefix */
+        if (app_path == NULL) {
+                g_free (desktop_file);
+                desktop_file = g_strdup_printf ("mate-%s.desktop", name);
+
+                g_key_file_load_from_dirs (key_file,
+                                           desktop_file,
+                                           (const char **) app_dirs,
+                                           &app_path,
+                                           G_KEY_FILE_NONE,
+                                           NULL);
+                if (app_path != NULL) {
+                        g_debug ("GsmUtil: found in XDG app dirs: '%s'", app_path);
+                }
+        }
+
+        if (app_path == NULL && autostart_dirs != NULL) {
+                g_key_file_load_from_dirs (key_file,
+                                           desktop_file,
+                                           (const char **) autostart_dirs,
+                                           &app_path,
+                                           G_KEY_FILE_NONE,
+                                           NULL);
+                if (app_path != NULL) {
+                        g_debug ("GsmUtil: found in autostart dirs: '%s'", app_path);
+                }
+        }
+
+        g_free (desktop_file);
+        g_key_file_free (key_file);
+
+        g_strfreev (app_dirs);
+
+        return app_path;
+}
+
+static gboolean
+ensure_dir_exists (const char *dir)
+{
+        if (g_file_test (dir, G_FILE_TEST_IS_DIR))
+                return TRUE;
+
+        if (g_mkdir_with_parents (dir, 0755) == 0)
+                return TRUE;
+
+        if (errno == EEXIST)
+                return g_file_test (dir, G_FILE_TEST_IS_DIR);
+
+        g_warning ("GsmSessionSave: Failed to create directory %s: %s", dir, strerror (errno));
+
+        return FALSE;
+}
+
+gchar *
+gsm_util_get_empty_tmp_session_dir (void)
+{
+        char *tmp;
+        gboolean exists;
+
+        tmp = g_build_filename (g_get_user_config_dir (),
+                                "mate-session",
+                                "saved-session.new",
+                                NULL);
+
+        exists = ensure_dir_exists (tmp);
+
+        if (G_UNLIKELY (!exists)) {
+                g_warning ("GsmSessionSave: could not create directory for saved session: %s", tmp);
+                g_free (tmp);
+                return NULL;
+        } else {
+                /* make sure it's empty */
+                GDir       *dir;
+                const char *filename;
+
+                dir = g_dir_open (tmp, 0, NULL);
+                if (dir) {
+                        while ((filename = g_dir_read_name (dir))) {
+                                char *path = g_build_filename (tmp, filename,
+                                                               NULL);
+                                g_unlink (path);
+                        }
+                        g_dir_close (dir);
+                }
+        }
+
+        return tmp;
+}
+
+const gchar *
+gsm_util_get_saved_session_dir (void)
+{
+        if (_saved_session_dir == NULL) {
+                gboolean exists;
+
+                _saved_session_dir =
+                        g_build_filename (g_get_user_config_dir (),
+                                          "mate-session",
+                                          "saved-session",
+                                          NULL);
+
+                exists = ensure_dir_exists (_saved_session_dir);
+
+                if (G_UNLIKELY (!exists)) {
+                        static gboolean printed_warning = FALSE;
+
+                        if (!printed_warning) {
+                                g_warning ("GsmSessionSave: could not create directory for saved session: %s", _saved_session_dir);
+                                printed_warning = TRUE;
+                        }
+
+                        _saved_session_dir = NULL;
+
+                        return NULL;
+                }
+        }
+
+        return _saved_session_dir;
+}
+
+
+char **
+gsm_util_get_autostart_dirs ()
+{
+        GPtrArray          *dirs;
+        const char * const *system_config_dirs;
+        const char * const *system_data_dirs;
+        int                 i;
+
+        dirs = g_ptr_array_new ();
+
+        g_ptr_array_add (dirs,
+                         g_build_filename (g_get_user_config_dir (),
+                                           "autostart", NULL));
+
+        system_data_dirs = g_get_system_data_dirs ();
+        for (i = 0; system_data_dirs[i]; i++) {
+                g_ptr_array_add (dirs,
+                                 g_build_filename (system_data_dirs[i],
+                                                   "mate", "autostart", NULL));
+        }
+
+        system_config_dirs = g_get_system_config_dirs ();
+        for (i = 0; system_config_dirs[i]; i++) {
+                g_ptr_array_add (dirs,
+                                 g_build_filename (system_config_dirs[i],
+                                                   "autostart", NULL));
+        }
+
+        g_ptr_array_add (dirs, NULL);
+
+        return (char **) g_ptr_array_free (dirs, FALSE);
+}
+
+char **
+gsm_util_get_app_dirs ()
+{
+        GPtrArray          *dirs;
+        const char * const *system_data_dirs;
+        int                 i;
+
+        dirs = g_ptr_array_new ();
+
+        g_ptr_array_add (dirs,
+			 g_build_filename (g_get_user_data_dir (),
+					   "applications",
+					   NULL));
+
+        system_data_dirs = g_get_system_data_dirs ();
+        for (i = 0; system_data_dirs[i]; i++) {
+                g_ptr_array_add (dirs,
+                                 g_build_filename (system_data_dirs[i],
+                                                   "applications",
+                                                   NULL));
+        }
+
+        g_ptr_array_add (dirs, NULL);
+
+        return (char **) g_ptr_array_free (dirs, FALSE);
+}
+
+char **
+gsm_util_get_desktop_dirs ()
+{
+	char **apps;
+	char **autostart;
+	char **result;
+	int    size;
+	int    i;
+
+	apps = gsm_util_get_app_dirs ();
+	autostart = gsm_util_get_autostart_dirs ();
+
+	size = 0;
+	for (i = 0; apps[i] != NULL; i++) { size++; }
+	for (i = 0; autostart[i] != NULL; i++) { size++; }
+	size += 2; /* saved session + last NULL */
+
+	result = g_new (char *, size + 1);
+
+	for (i = 0; apps[i] != NULL; i++) {
+		result[i] = apps[i];
+	}
+	g_free (apps);
+	size = i;
+
+	for (i = 0; autostart[i] != NULL; i++) {
+		result[size + i] = autostart[i];
+	}
+	g_free (autostart);
+	size = size + i;
+
+	result[size] = g_strdup (gsm_util_get_saved_session_dir ());
+	result[size + 1] = NULL;
+
+	return result;
+}
+
+gboolean
+gsm_util_text_is_blank (const char *str)
+{
+        if (str == NULL) {
+                return TRUE;
+        }
+
+        while (*str) {
+                if (!isspace(*str)) {
+                        return FALSE;
+                }
+
+                str++;
+        }
+
+        return TRUE;
+}
+
+/**
+ * gsm_util_init_error:
+ * @fatal: whether or not the error is fatal to the login session
+ * @format: printf-style error message format
+ * @...: error message args
+ *
+ * Displays the error message to the user. If @fatal is %TRUE, gsm
+ * will exit after displaying the message.
+ *
+ * This should be called for major errors that occur before the
+ * session is up and running. (Notably, it positions the dialog box
+ * itself, since no window manager will be running yet.)
+ **/
+void
+gsm_util_init_error (gboolean    fatal,
+                     const char *format, ...)
+{
+        GtkWidget *dialog;
+        char      *msg;
+        va_list    args;
+
+        va_start (args, format);
+        msg = g_strdup_vprintf (format, args);
+        va_end (args);
+
+        /* If option parsing failed, Gtk won't have been initialized... */
+        if (!gdk_display_get_default ()) {
+                if (!gtk_init_check (NULL, NULL)) {
+                        /* Oh well, no X for you! */
+                        g_printerr (_("Unable to start login session (and unable to connect to the X server)"));
+                        g_printerr ("%s", msg);
+                        exit (1);
+                }
+        }
+
+        dialog = gtk_message_dialog_new (NULL, 0, GTK_MESSAGE_ERROR,
+                                         GTK_BUTTONS_CLOSE, "%s", msg);
+
+        g_free (msg);
+
+        gtk_window_set_position (GTK_WINDOW (dialog), GTK_WIN_POS_CENTER);
+        gtk_dialog_run (GTK_DIALOG (dialog));
+
+        gtk_widget_destroy (dialog);
+
+        if (fatal) {
+                gtk_main_quit ();
+        }
+}
+
+/**
+ * gsm_util_generate_startup_id:
+ *
+ * Generates a new SM client ID.
+ *
+ * Return value: an SM client ID.
+ **/
+char *
+gsm_util_generate_startup_id (void)
+{
+        static int     sequence = -1;
+        static guint   rand1 = 0;
+        static guint   rand2 = 0;
+        static pid_t   pid = 0;
+        struct timeval tv;
+
+        /* The XSMP spec defines the ID as:
+         *
+         * Version: "1"
+         * Address type and address:
+         *   "1" + an IPv4 address as 8 hex digits
+         *   "2" + a DECNET address as 12 hex digits
+         *   "6" + an IPv6 address as 32 hex digits
+         * Time stamp: milliseconds since UNIX epoch as 13 decimal digits
+         * Process-ID type and process-ID:
+         *   "1" + POSIX PID as 10 decimal digits
+         * Sequence number as 4 decimal digits
+         *
+         * XSMP client IDs are supposed to be globally unique: if
+         * SmsGenerateClientID() is unable to determine a network
+         * address for the machine, it gives up and returns %NULL.
+         * MATE and KDE have traditionally used a fourth address
+         * format in this case:
+         *   "0" + 16 random hex digits
+         *
+         * We don't even bother trying SmsGenerateClientID(), since the
+         * user's IP address is probably "192.168.1.*" anyway, so a random
+         * number is actually more likely to be globally unique.
+         */
+
+        if (!rand1) {
+                rand1 = g_random_int ();
+                rand2 = g_random_int ();
+                pid = getpid ();
+        }
+
+        sequence = (sequence + 1) % 10000;
+        gettimeofday (&tv, NULL);
+        return g_strdup_printf ("10%.04x%.04x%.10lu%.3u%.10lu%.4d",
+                                rand1,
+                                rand2,
+                                (unsigned long) tv.tv_sec,
+                                (unsigned) tv.tv_usec,
+                                (unsigned long) pid,
+                                sequence);
+}
+
+static gboolean
+gsm_util_update_activation_environment (const char  *variable,
+                                        const char  *value,
+                                        GError     **error)
+{
+        DBusGConnection *dbus_connection;
+        DBusGProxy      *bus_proxy;
+        GHashTable      *environment;
+        gboolean         environment_updated;
+
+        environment_updated = FALSE;
+        bus_proxy = NULL;
+        environment = NULL;
+
+        dbus_connection = dbus_g_bus_get (DBUS_BUS_SESSION, error);
+
+        if (dbus_connection == NULL) {
+                return FALSE;
+        }
+
+        bus_proxy = dbus_g_proxy_new_for_name_owner (dbus_connection,
+                                                     DBUS_SERVICE_DBUS,
+                                                     DBUS_PATH_DBUS,
+                                                     DBUS_INTERFACE_DBUS,
+                                                     error);
+
+        if (bus_proxy == NULL) {
+                goto out;
+        }
+
+        environment = g_hash_table_new (g_str_hash, g_str_equal);
+
+        g_hash_table_insert (environment, (void *) variable, (void *) value);
+
+        if (!dbus_g_proxy_call (bus_proxy,
+                                "UpdateActivationEnvironment", error,
+                                DBUS_TYPE_G_STRING_STRING_HASHTABLE,
+                                environment, G_TYPE_INVALID,
+                                G_TYPE_INVALID))
+                goto out;
+
+        environment_updated = TRUE;
+
+ out:
+
+        if (bus_proxy != NULL) {
+                g_object_unref (bus_proxy);
+        }
+
+        if (environment != NULL) {
+                g_hash_table_destroy (environment);
+        }
+
+        return environment_updated;
+}
+
+void
+gsm_util_setenv (const char *variable,
+                 const char *value)
+{
+        GError *bus_error;
+
+        g_setenv (variable, value, TRUE);
+
+        bus_error = NULL;
+
+        /* If this fails it isn't fatal, it means some things like session
+         * management and keyring won't work in activated clients.
+         */
+        if (!gsm_util_update_activation_environment (variable, value, &bus_error)) {
+                g_warning ("Could not make bus activated clients aware of %s=%s environment variable: %s", variable, value, bus_error->message);
+                g_error_free (bus_error);
+        }
+}