c70087db0c
meta_run() calls meta_finalize() after the main loop exits, which ends up calling meta_display_close(), which calls meta_quit(META_EXIT_SUCCESS), meaning that any exit status passed to the original meta_quit() call is lost. Fix this by ignoring meta_quit() calls after the main loop is no longer running. https://bugzilla.gnome.org/show_bug.cgi?id=652010
611 lines
16 KiB
C
611 lines
16 KiB
C
/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
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/* Mutter main() */
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/*
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* Copyright (C) 2001 Havoc Pennington
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* Copyright (C) 2006 Elijah Newren
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*/
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/**
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* \file
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* Program startup.
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* Functions which parse the command-line arguments, create the display,
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* kick everything off and then close down Mutter when it's time to go.
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*/
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/**
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* \mainpage
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* Mutter - a boring window manager for the adult in you
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*
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* Many window managers are like Marshmallow Froot Loops; Mutter
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* is like Cheerios.
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*
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* The best way to get a handle on how the whole system fits together
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* is discussed in doc/code-overview.txt; if you're looking for functions
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* to investigate, read main(), meta_display_open(), and event_callback().
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*/
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#define _GNU_SOURCE
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#define _SVID_SOURCE /* for putenv() and some signal-related functions */
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#include <config.h>
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#include <meta/main.h>
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#include <meta/util.h>
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#include "display-private.h"
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#include <meta/errors.h>
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#include "ui.h"
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#include "session.h"
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#include <meta/prefs.h>
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#include <meta/compositor.h>
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#include <glib-object.h>
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#include <gdk/gdkx.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <wait.h>
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#include <stdio.h>
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#include <string.h>
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#include <signal.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <locale.h>
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#include <time.h>
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#include <unistd.h>
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#include <clutter/clutter.h>
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#include <clutter/x11/clutter-x11.h>
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#ifdef HAVE_INTROSPECTION
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#include <girepository.h>
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#endif
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/**
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* The exit code we'll return to our parent process when we eventually die.
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*/
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static MetaExitCode meta_exit_code = META_EXIT_SUCCESS;
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/**
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* Handle on the main loop, so that we have an easy way of shutting Mutter
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* down.
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*/
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static GMainLoop *meta_main_loop = NULL;
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static void prefs_changed_callback (MetaPreference pref,
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gpointer data);
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/**
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* Prints log messages. If Mutter was compiled with backtrace support,
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* also prints a backtrace (see meta_print_backtrace()).
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*
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* \param log_domain the domain the error occurred in (we ignore this)
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* \param log_level the log level so that we can filter out less
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* important messages
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* \param message the message to log
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* \param user_data arbitrary data (we ignore this)
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*/
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static void
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log_handler (const gchar *log_domain,
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GLogLevelFlags log_level,
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const gchar *message,
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gpointer user_data)
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{
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meta_warning ("Log level %d: %s\n", log_level, message);
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meta_print_backtrace ();
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}
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/**
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* Prints a list of which configure script options were used to
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* build this copy of Mutter. This is actually always called
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* on startup, but it's all no-op unless we're in verbose mode
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* (see meta_set_verbose).
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*/
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static void
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meta_print_compilation_info (void)
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{
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#ifdef HAVE_SHAPE
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meta_verbose ("Compiled with shape extension\n");
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#else
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meta_verbose ("Compiled without shape extension\n");
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#endif
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#ifdef HAVE_XINERAMA
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meta_topic (META_DEBUG_XINERAMA, "Compiled with Xinerama extension\n");
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#else
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meta_topic (META_DEBUG_XINERAMA, "Compiled without Xinerama extension\n");
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#endif
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#ifdef HAVE_XFREE_XINERAMA
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meta_topic (META_DEBUG_XINERAMA, " (using XFree86 Xinerama)\n");
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#else
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meta_topic (META_DEBUG_XINERAMA, " (not using XFree86 Xinerama)\n");
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#endif
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#ifdef HAVE_SOLARIS_XINERAMA
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meta_topic (META_DEBUG_XINERAMA, " (using Solaris Xinerama)\n");
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#else
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meta_topic (META_DEBUG_XINERAMA, " (not using Solaris Xinerama)\n");
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#endif
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#ifdef HAVE_XSYNC
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meta_verbose ("Compiled with sync extension\n");
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#else
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meta_verbose ("Compiled without sync extension\n");
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#endif
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#ifdef HAVE_RANDR
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meta_verbose ("Compiled with randr extension\n");
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#else
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meta_verbose ("Compiled without randr extension\n");
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#endif
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#ifdef HAVE_STARTUP_NOTIFICATION
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meta_verbose ("Compiled with startup notification\n");
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#else
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meta_verbose ("Compiled without startup notification\n");
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#endif
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}
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/**
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* Prints the version number, the current timestamp (not the
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* build date), the locale, the character encoding, and a list
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* of configure script options that were used to build this
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* copy of Mutter. This is actually always called
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* on startup, but it's all no-op unless we're in verbose mode
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* (see meta_set_verbose).
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*/
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static void
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meta_print_self_identity (void)
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{
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char buf[256];
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GDate d;
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const char *charset;
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/* Version and current date. */
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g_date_clear (&d, 1);
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g_date_set_time_t (&d, time (NULL));
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g_date_strftime (buf, sizeof (buf), "%x", &d);
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meta_verbose ("Mutter version %s running on %s\n",
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VERSION, buf);
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/* Locale and encoding. */
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g_get_charset (&charset);
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meta_verbose ("Running in locale \"%s\" with encoding \"%s\"\n",
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setlocale (LC_ALL, NULL), charset);
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/* Compilation settings. */
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meta_print_compilation_info ();
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}
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/**
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* The set of possible options that can be set on Mutter's
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* command line.
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*/
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static gchar *opt_save_file;
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static gchar *opt_display_name;
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static gchar *opt_client_id;
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static gboolean opt_replace_wm;
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static gboolean opt_disable_sm;
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static gboolean opt_sync;
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static GOptionEntry meta_options[] = {
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{
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"sm-disable", 0, 0, G_OPTION_ARG_NONE,
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&opt_disable_sm,
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N_("Disable connection to session manager"),
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NULL
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},
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{
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"replace", 0, 0, G_OPTION_ARG_NONE,
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&opt_replace_wm,
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N_("Replace the running window manager"),
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NULL
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},
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{
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"sm-client-id", 0, 0, G_OPTION_ARG_STRING,
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&opt_client_id,
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N_("Specify session management ID"),
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"ID"
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},
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{
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"display", 'd', 0, G_OPTION_ARG_STRING,
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&opt_display_name, N_("X Display to use"),
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"DISPLAY"
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},
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{
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"sm-save-file", 0, 0, G_OPTION_ARG_FILENAME,
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&opt_save_file,
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N_("Initialize session from savefile"),
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"FILE"
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},
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{
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"sync", 0, 0, G_OPTION_ARG_NONE,
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&opt_sync,
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N_("Make X calls synchronous"),
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NULL
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},
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{NULL}
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};
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/**
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* meta_get_option_context: (skip)
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*
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* Returns a #GOptionContext initialized with mutter-related options.
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* Parse the command-line args with this before calling meta_init().
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*
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* Return value: the #GOptionContext
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*/
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GOptionContext *
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meta_get_option_context (void)
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{
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GOptionContext *ctx;
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if (setlocale (LC_ALL, "") == NULL)
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meta_warning ("Locale not understood by C library, internationalization will not work\n");
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bindtextdomain (GETTEXT_PACKAGE, MUTTER_LOCALEDIR);
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bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
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ctx = g_option_context_new (NULL);
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g_option_context_add_main_entries (ctx, meta_options, GETTEXT_PACKAGE);
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g_option_context_add_group (ctx, clutter_get_option_group_without_init ());
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g_option_context_add_group (ctx, cogl_get_option_group ());
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return ctx;
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}
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/* Mutter is responsible for pulling events off the X queue, so Clutter
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* doesn't need (and shouldn't) run its normal event source which polls
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* the X fd, but we do have to deal with dispatching events that accumulate
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* in the clutter queue. This happens, for example, when clutter generate
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* enter/leave events on mouse motion - several events are queued in the
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* clutter queue but only one dispatched. It could also happen because of
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* explicit calls to clutter_event_put(). We add a very simple custom
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* event loop source which is simply responsible for pulling events off
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* of the queue and dispatching them before we block for new events.
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*/
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static gboolean
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event_prepare (GSource *source,
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gint *timeout_)
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{
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*timeout_ = -1;
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return clutter_events_pending ();
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}
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static gboolean
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event_check (GSource *source)
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{
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return clutter_events_pending ();
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}
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static gboolean
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event_dispatch (GSource *source,
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GSourceFunc callback,
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gpointer user_data)
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{
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ClutterEvent *event = clutter_event_get ();
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if (event)
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clutter_do_event (event);
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return TRUE;
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}
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static GSourceFuncs event_funcs = {
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event_prepare,
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event_check,
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event_dispatch
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};
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static void
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meta_clutter_init (void)
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{
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clutter_x11_set_display (GDK_DISPLAY_XDISPLAY (gdk_display_get_default ()));
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clutter_x11_disable_event_retrieval ();
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if (CLUTTER_INIT_SUCCESS == clutter_init (NULL, NULL))
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{
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GSource *source = g_source_new (&event_funcs, sizeof (GSource));
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g_source_attach (source, NULL);
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g_source_unref (source);
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}
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else
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{
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meta_fatal ("Unable to initialize Clutter.\n");
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}
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}
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/**
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* Selects which display Mutter should use. It first tries to use
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* display_name as the display. If display_name is NULL then
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* try to use the environment variable MUTTER_DISPLAY. If that
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* also is NULL, use the default - :0.0
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*/
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static void
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meta_select_display (gchar *display_name)
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{
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gchar *envVar = "";
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if (display_name)
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envVar = g_strconcat ("DISPLAY=", display_name, NULL);
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else if (g_getenv ("MUTTER_DISPLAY"))
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envVar = g_strconcat ("DISPLAY=",
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g_getenv ("MUTTER_DISPLAY"), NULL);
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/* DO NOT FREE envVar, putenv() sucks */
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putenv (envVar);
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}
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static void
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meta_finalize (void)
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{
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MetaDisplay *display = meta_get_display ();
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if (display)
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meta_display_close (display,
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CurrentTime); /* I doubt correct timestamps matter here */
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}
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static int sigterm_pipe_fds[2] = { -1, -1 };
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static void
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sigterm_handler (int signum)
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{
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if (sigterm_pipe_fds[1] >= 0)
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{
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int G_GNUC_UNUSED dummy;
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dummy = write (sigterm_pipe_fds[1], "", 1);
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close (sigterm_pipe_fds[1]);
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sigterm_pipe_fds[1] = -1;
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}
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}
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static gboolean
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on_sigterm (void)
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{
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meta_quit (META_EXIT_SUCCESS);
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return FALSE;
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}
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/**
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* meta_init: (skip)
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*
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* Initialize mutter. Call this after meta_get_option_context() and
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* meta_plugin_type_register(), and before meta_run().
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*/
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void
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meta_init (void)
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{
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struct sigaction act;
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sigset_t empty_mask;
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GIOChannel *channel;
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g_type_init ();
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sigemptyset (&empty_mask);
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act.sa_handler = SIG_IGN;
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act.sa_mask = empty_mask;
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act.sa_flags = 0;
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if (sigaction (SIGPIPE, &act, NULL) < 0)
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g_printerr ("Failed to register SIGPIPE handler: %s\n",
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g_strerror (errno));
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#ifdef SIGXFSZ
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if (sigaction (SIGXFSZ, &act, NULL) < 0)
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g_printerr ("Failed to register SIGXFSZ handler: %s\n",
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g_strerror (errno));
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#endif
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if (pipe (sigterm_pipe_fds) != 0)
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g_printerr ("Failed to create SIGTERM pipe: %s\n",
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g_strerror (errno));
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channel = g_io_channel_unix_new (sigterm_pipe_fds[0]);
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g_io_channel_set_flags (channel, G_IO_FLAG_NONBLOCK, NULL);
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g_io_add_watch (channel, G_IO_IN, (GIOFunc) on_sigterm, NULL);
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g_io_channel_set_close_on_unref (channel, TRUE);
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g_io_channel_unref (channel);
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act.sa_handler = &sigterm_handler;
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if (sigaction (SIGTERM, &act, NULL) < 0)
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g_printerr ("Failed to register SIGTERM handler: %s\n",
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g_strerror (errno));
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if (g_getenv ("MUTTER_VERBOSE"))
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meta_set_verbose (TRUE);
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if (g_getenv ("MUTTER_DEBUG"))
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meta_set_debugging (TRUE);
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if (g_get_home_dir ())
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if (chdir (g_get_home_dir ()) < 0)
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meta_warning ("Could not change to home directory %s.\n",
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g_get_home_dir ());
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meta_print_self_identity ();
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#ifdef HAVE_INTROSPECTION
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g_irepository_prepend_search_path (MUTTER_PKGLIBDIR);
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#endif
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meta_set_syncing (opt_sync || (g_getenv ("MUTTER_SYNC") != NULL));
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meta_select_display (opt_display_name);
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if (opt_replace_wm)
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meta_set_replace_current_wm (TRUE);
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if (opt_save_file && opt_client_id)
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meta_fatal ("Can't specify both SM save file and SM client id\n");
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meta_main_loop = g_main_loop_new (NULL, FALSE);
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meta_ui_init ();
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/*
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* Clutter can only be initialized after the UI.
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*/
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meta_clutter_init ();
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}
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/**
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* meta_run: (skip)
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*
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* Runs mutter. Call this after completing your own initialization.
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*
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* Return value: mutter's exit status
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*/
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int
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meta_run (void)
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{
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const gchar *log_domains[] = {
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NULL, G_LOG_DOMAIN, "Gtk", "Gdk", "GLib",
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"Pango", "GLib-GObject", "GThread"
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};
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guint i;
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/* Load prefs */
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meta_prefs_init ();
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meta_prefs_add_listener (prefs_changed_callback, NULL);
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for (i=0; i<G_N_ELEMENTS(log_domains); i++)
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g_log_set_handler (log_domains[i],
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G_LOG_LEVEL_MASK | G_LOG_FLAG_FATAL | G_LOG_FLAG_RECURSION,
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log_handler, NULL);
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if (g_getenv ("MUTTER_G_FATAL_WARNINGS") != NULL)
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g_log_set_always_fatal (G_LOG_LEVEL_MASK);
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meta_ui_set_current_theme (meta_prefs_get_theme (), FALSE);
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/* Try to find some theme that'll work if the theme preference
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* doesn't exist. First try Simple (the default theme) then just
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* try anything in the themes directory.
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*/
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if (!meta_ui_have_a_theme ())
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meta_ui_set_current_theme ("Simple", FALSE);
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if (!meta_ui_have_a_theme ())
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{
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const char *dir_entry = NULL;
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GError *err = NULL;
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GDir *themes_dir = NULL;
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if (!(themes_dir = g_dir_open (MUTTER_DATADIR"/themes", 0, &err)))
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{
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meta_fatal (_("Failed to scan themes directory: %s\n"), err->message);
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g_error_free (err);
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}
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else
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{
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while (((dir_entry = g_dir_read_name (themes_dir)) != NULL) &&
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(!meta_ui_have_a_theme ()))
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{
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meta_ui_set_current_theme (dir_entry, FALSE);
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}
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g_dir_close (themes_dir);
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}
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}
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if (!meta_ui_have_a_theme ())
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meta_fatal (_("Could not find a theme! Be sure %s exists and contains the usual themes.\n"),
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MUTTER_DATADIR"/themes");
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/* Connect to SM as late as possible - but before managing display,
|
|
* or we might try to manage a window before we have the session
|
|
* info
|
|
*/
|
|
if (!opt_disable_sm)
|
|
{
|
|
if (opt_client_id == NULL)
|
|
{
|
|
const gchar *desktop_autostart_id;
|
|
|
|
desktop_autostart_id = g_getenv ("DESKTOP_AUTOSTART_ID");
|
|
|
|
if (desktop_autostart_id != NULL)
|
|
opt_client_id = g_strdup (desktop_autostart_id);
|
|
}
|
|
|
|
/* Unset DESKTOP_AUTOSTART_ID in order to avoid child processes to
|
|
* use the same client id. */
|
|
g_unsetenv ("DESKTOP_AUTOSTART_ID");
|
|
|
|
meta_session_init (opt_client_id, opt_save_file);
|
|
}
|
|
/* Free memory possibly allocated by the argument parsing which are
|
|
* no longer needed.
|
|
*/
|
|
g_free (opt_save_file);
|
|
g_free (opt_display_name);
|
|
g_free (opt_client_id);
|
|
|
|
if (!meta_display_open ())
|
|
meta_exit (META_EXIT_ERROR);
|
|
|
|
g_main_loop_run (meta_main_loop);
|
|
|
|
meta_finalize ();
|
|
|
|
return meta_exit_code;
|
|
}
|
|
|
|
/**
|
|
* Stops Mutter. This tells the event loop to stop processing; it is
|
|
* rather dangerous to use this because this will leave the user with
|
|
* no window manager. We generally do this only if, for example, the
|
|
* session manager asks us to; we assume the session manager knows
|
|
* what it's talking about.
|
|
*
|
|
* \param code The success or failure code to return to the calling process.
|
|
*/
|
|
void
|
|
meta_quit (MetaExitCode code)
|
|
{
|
|
if (g_main_loop_is_running (meta_main_loop))
|
|
{
|
|
meta_exit_code = code;
|
|
g_main_loop_quit (meta_main_loop);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Called on pref changes. (One of several functions of its kind and purpose.)
|
|
*
|
|
* \bug Why are these particular prefs handled in main.c and not others?
|
|
* Should they be?
|
|
*
|
|
* \param pref Which preference has changed
|
|
* \param data Arbitrary data (which we ignore)
|
|
*/
|
|
static void
|
|
prefs_changed_callback (MetaPreference pref,
|
|
gpointer data)
|
|
{
|
|
switch (pref)
|
|
{
|
|
case META_PREF_THEME:
|
|
meta_ui_set_current_theme (meta_prefs_get_theme (), FALSE);
|
|
meta_display_retheme_all ();
|
|
break;
|
|
|
|
case META_PREF_CURSOR_THEME:
|
|
case META_PREF_CURSOR_SIZE:
|
|
meta_display_set_cursor_theme (meta_prefs_get_cursor_theme (),
|
|
meta_prefs_get_cursor_size ());
|
|
break;
|
|
default:
|
|
/* handled elsewhere or otherwise */
|
|
break;
|
|
}
|
|
}
|