diff options
Diffstat (limited to 'src/terminal.cc')
| -rw-r--r-- | src/terminal.cc | 629 |
1 files changed, 629 insertions, 0 deletions
diff --git a/src/terminal.cc b/src/terminal.cc new file mode 100644 index 0000000..520b104 --- /dev/null +++ b/src/terminal.cc @@ -0,0 +1,629 @@ +/* + * Copyright © 2001, 2002 Havoc Pennington + * Copyright © 2002 Red Hat, Inc. + * Copyright © 2002 Sun Microsystems + * Copyright © 2003 Mariano Suarez-Alvarez + * Copyright © 2008, 2010, 2011 Christian Persch + * + * 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 3 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include "config.h" + +#include <errno.h> +#include <locale.h> +#include <stdlib.h> +#include <time.h> +#include <unistd.h> +#include <sys/wait.h> + +#include <glib.h> +#include <glib/gstdio.h> +#include <gio/gio.h> +#include <glib/gi18n.h> + +#include <gtk/gtk.h> + +#include "terminal-debug.hh" +#include "terminal-defines.hh" +#include "terminal-i18n.hh" +#include "terminal-options.hh" +#include "terminal-gdbus-generated.h" +#include "terminal-defines.hh" +#include "terminal-client-utils.hh" +#include "terminal-libgsystem.hh" + +GS_DEFINE_CLEANUP_FUNCTION0(TerminalOptions*, gs_local_options_free, terminal_options_free) +#define gs_free_options __attribute__ ((cleanup(gs_local_options_free))) + +/* Wait-for-exit helper */ + +typedef struct { + GMainLoop *loop; + int status; +} RunData; + +static void +receiver_child_exited_cb (TerminalReceiver *receiver, + int status, + RunData *data) +{ + data->status = status; + + if (g_main_loop_is_running (data->loop)) + g_main_loop_quit (data->loop); +} + +static void +factory_name_owner_notify_cb (TerminalFactory *factory, + GParamSpec *pspec, + RunData *data) +{ + /* Name owner change to nullptr can only mean that the server + * went away before it could send out our child-exited signal. + * Assume the server was killed and thus our child process + * too, and return with the corresponding exit code. + */ + if (g_dbus_proxy_get_name_owner(G_DBUS_PROXY (factory)) != nullptr) + return; + + data->status = W_EXITCODE(0, SIGKILL); + + if (g_main_loop_is_running (data->loop)) + g_main_loop_quit (data->loop); +} + +static int +run_receiver (TerminalFactory *factory, + TerminalReceiver *receiver) +{ + RunData data = { g_main_loop_new (nullptr, FALSE), 0 }; + gulong receiver_exited_id = g_signal_connect (receiver, "child-exited", + G_CALLBACK (receiver_child_exited_cb), &data); + gulong factory_notify_id = g_signal_connect (factory, "notify::g-name-owner", + G_CALLBACK (factory_name_owner_notify_cb), &data); + g_main_loop_run (data.loop); + g_signal_handler_disconnect (receiver, receiver_exited_id); + g_signal_handler_disconnect (factory, factory_notify_id); + g_main_loop_unref (data.loop); + + /* Mangle the exit status */ + int exit_code; + if (WIFEXITED (data.status)) + exit_code = WEXITSTATUS (data.status); + else if (WIFSIGNALED (data.status)) + exit_code = 128 + (int) WTERMSIG (data.status); + else if (WCOREDUMP (data.status)) + exit_code = 127; + else + exit_code = 127; + + return exit_code; +} + +/* Factory helpers */ + +static gboolean +get_factory_exit_status (const char *service_name, + const char *message, + int *exit_status) +{ + gs_free char *pattern = nullptr, *number = nullptr; + gs_unref_regex GRegex *regex = nullptr; + gs_free_match_info GMatchInfo *match_info = nullptr; + gint64 v; + char *end; + GError *err = nullptr; + + pattern = g_strdup_printf ("org.freedesktop.DBus.Error.Spawn.ChildExited: Process %s exited with status (\\d+)$", + service_name); + regex = g_regex_new (pattern, GRegexCompileFlags(0), GRegexMatchFlags(0), &err); + g_assert_no_error (err); + + if (!g_regex_match (regex, message, GRegexMatchFlags(0), &match_info)) + return FALSE; + + number = g_match_info_fetch (match_info, 1); + g_assert_nonnull (number); + + errno = 0; + v = g_ascii_strtoll (number, &end, 10); + if (errno || end == number || *end != '\0' || v < 0 || v > G_MAXINT) + return FALSE; + + *exit_status = (int)v; + return TRUE; +} + +static gboolean +handle_factory_error (const char *service_name, + GError *error) +{ + int exit_status; + + if (!g_dbus_error_is_remote_error (error) || + !g_error_matches (error, G_DBUS_ERROR, G_DBUS_ERROR_SPAWN_CHILD_EXITED) || + !get_factory_exit_status (service_name, error->message, &exit_status)) + return FALSE; + + g_dbus_error_strip_remote_error (error); + terminal_printerr ("%s\n\n", error->message); + + switch (exit_status) { + case _EXIT_FAILURE_WRONG_ID: + terminal_printerr ("You tried to run gnome-terminal-server with elevated privileged. This is not supported.\n"); + break; + case _EXIT_FAILURE_NO_UTF8: + terminal_printerr ("The environment that gnome-terminal-server was launched with specified a non-UTF-8 locale. This is not supported.\n"); + break; + case _EXIT_FAILURE_UNSUPPORTED_LOCALE: + terminal_printerr ("The environment that gnome-terminal-server was launched with specified an unsupported locale.\n"); + break; + case _EXIT_FAILURE_GTK_INIT: + terminal_printerr ("The environment that gnome-terminal-server was launched with most likely contained an incorrect or unset \"DISPLAY\" variable.\n"); + break; + default: + break; + } + terminal_printerr ("See https://wiki.gnome.org/Apps/Terminal/FAQ#Exit_status_%d for more information.\n", exit_status); + + return TRUE; +} + +static gboolean +handle_create_instance_error (const char *service_name, + GError *error) +{ + if (handle_factory_error (service_name, error)) + return TRUE; + + g_dbus_error_strip_remote_error (error); + terminal_printerr ("Error creating terminal: %s\n", error->message); + return FALSE; /* don't abort */ +} + +static gboolean +handle_create_receiver_proxy_error (const char *service_name, + GError *error) +{ + if (handle_factory_error (service_name, error)) + return TRUE; + + g_dbus_error_strip_remote_error (error); + terminal_printerr ("Failed to create proxy for terminal: %s\n", error->message); + return FALSE; /* don't abort */ +} + +static gboolean +handle_exec_error (const char *service_name, + GError *error) +{ + if (handle_factory_error (service_name, error)) + return TRUE; + + g_dbus_error_strip_remote_error (error); + terminal_printerr ("Error: %s\n", error->message); + return FALSE; /* don't abort */ +} + +static gboolean +factory_proxy_new_for_service_name (const char *service_name, + gboolean ping_server, + gboolean connect_signals, + TerminalFactory **factory_ptr, + char **service_name_ptr, + GError **error) +{ + if (service_name == nullptr) + service_name = TERMINAL_APPLICATION_ID; + + gs_free_error GError *err = nullptr; + gs_unref_object TerminalFactory *factory = + terminal_factory_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION, + GDBusProxyFlags(G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES | + connect_signals ? 0 : G_DBUS_PROXY_FLAGS_DO_NOT_CONNECT_SIGNALS), + service_name, + TERMINAL_FACTORY_OBJECT_PATH, + nullptr /* cancellable */, + &err); + if (factory == nullptr) { + if (!handle_factory_error (service_name, err)) + terminal_printerr ("Error constructing proxy for %s:%s: %s\n", + service_name, TERMINAL_FACTORY_OBJECT_PATH, err->message); + g_propagate_error (error, err); + err = nullptr; + return FALSE; + } + + if (ping_server) { + /* If we try to use the environment specified server, we need to make + * sure it actually exists so we can later fall back to the default name. + * There doesn't appear to a way to fail proxy creation above if the + * unique name doesn't exist; so we do it this way. + */ + gs_unref_variant GVariant *v = g_dbus_proxy_call_sync (G_DBUS_PROXY (factory), + "org.freedesktop.DBus.Peer.Ping", + g_variant_new ("()"), + G_DBUS_CALL_FLAGS_NONE, + 1000 /* 1s */, + nullptr /* cancelleable */, + &err); + if (v == nullptr) { + g_propagate_error (error, err); + err = nullptr; + return FALSE; + } + } + + gs_transfer_out_value (factory_ptr, &factory); + *service_name_ptr = g_strdup (service_name); + return TRUE; +} + +static gboolean +factory_proxy_new (TerminalOptions *options, + TerminalFactory **factory_ptr, + char **service_name_ptr, + char **parent_screen_object_path_ptr, + GError **error) +{ + const char *service_name = options->server_app_id; + + /* If --app-id was specified, or the environment does not specify + * the server to use, create the factory proxy from the given (or default) + * name, with no fallback. + * + * If the server specified by the environment doesn't exist, fall back to the + * default server, and ignore the environment-specified parent screen. + */ + if (options->server_app_id == nullptr && + options->server_unique_name != nullptr) { + gs_free_error GError *err = nullptr; + if (factory_proxy_new_for_service_name (options->server_unique_name, + TRUE, + options->wait, + factory_ptr, + service_name_ptr, + &err)) { + *parent_screen_object_path_ptr = g_strdup (options->parent_screen_object_path); + return TRUE; + } + + terminal_printerr ("Failed to use specified server: %s\n", + err->message); + terminal_printerr ("Falling back to default server.\n"); + + /* Fall back to the default */ + service_name = nullptr; + } + + *parent_screen_object_path_ptr = nullptr; + + return factory_proxy_new_for_service_name (service_name, + FALSE, + options->wait, + factory_ptr, + service_name_ptr, + error); +} + +static bool +handle_show_preferences_remote (TerminalOptions *options, + const char *service_name) +{ + gs_free_error GError *error = nullptr; + gs_unref_object GDBusConnection *bus = nullptr; + gs_free char *object_path = nullptr; + GVariantBuilder builder; + + /* For reasons (!?), the org.gtk.Actions interface's object path + * is derived from the service name, i.e. for service name + * "foo.bar.baz" the object path is "/foo/bar/baz". + * This means that without the name (like when given only the unique name), + * we cannot activate the action. + */ + if (!service_name || + g_dbus_is_unique_name(service_name)) { + return false; + } + + bus = g_bus_get_sync (G_BUS_TYPE_SESSION, nullptr, &error); + if (bus == nullptr) { + terminal_printerr ("Failed to get session bus: %s\n", error->message); + return true; + } + + object_path = g_strdelimit (g_strdup_printf (".%s", service_name), ".", '/'); + + g_variant_builder_init (&builder, G_VARIANT_TYPE ("(sava{sv})")); + g_variant_builder_add (&builder, "s", "preferences"); + g_variant_builder_open (&builder, G_VARIANT_TYPE ("av")); + g_variant_builder_close (&builder); + g_variant_builder_open (&builder, G_VARIANT_TYPE ("a{sv}")); + if (options->startup_id) + g_variant_builder_add (&builder, "{sv}", + "desktop-startup-id", g_variant_new_string (options->startup_id)); + if (options->activation_token) + g_variant_builder_add (&builder, "{sv}", + "activation-token", g_variant_new_string (options->activation_token)); + g_variant_builder_close (&builder); + + if (!g_dbus_connection_call_sync (bus, + service_name, + object_path, + "org.gtk.Actions", + "Activate", + g_variant_builder_end (&builder), + G_VARIANT_TYPE ("()"), + G_DBUS_CALL_FLAGS_NO_AUTO_START, + 30 * 1000 /* ms timeout */, + nullptr /* cancelleable */, + &error)) { + terminal_printerr ("Activate call failed: %s\n", error->message); + return true; + } + + return true; +} + +static void +handle_show_preferences(TerminalOptions *options, + const char *service_name) +{ + // First try remoting to the specified server + if (handle_show_preferences_remote(options, service_name)) + return; + + // If that isn't possible, launch the prefs binary directly + auto launcher = g_subprocess_launcher_new(GSubprocessFlags(0)); + gs_free auto exe = terminal_client_get_file_uninstalled(TERM_BINDIR, + TERM_LIBEXECDIR, + TERMINAL_PREFERENCES_BINARY_NAME, + G_FILE_TEST_IS_EXECUTABLE); + char *argv[2] = {exe, nullptr}; + + gs_free_error GError* error = nullptr; + if (!g_subprocess_launcher_spawnv(launcher, argv, &error)) { + terminal_printerr ("Failed to launch preferences: %s\n", error->message); + } +} + +/** + * handle_options: + * @app: + * @options: a #TerminalOptions + * @allow_resume: whether to merge the terminal configuration from the + * saved session on resume + * @wait_for_receiver: location to store the #TerminalReceiver to wait for + * + * Processes @options. It loads or saves the terminal configuration, or + * opens the specified windows and tabs. + * + * Returns: %TRUE if @options could be successfully handled, or %FALSE on + * error + */ +static gboolean +handle_options (TerminalOptions *options, + TerminalFactory *factory, + const char *service_name, + const char *parent_screen_object_path, + TerminalReceiver **wait_for_receiver) +{ + /* We need to forward the locale encoding to the server, see bug #732128 */ + const char *encoding; + g_get_charset (&encoding); + + if (options->show_preferences) { + handle_show_preferences (options, service_name); + } else { + /* Make sure we open at least one window */ + terminal_options_ensure_window (options); + } + + const char *factory_unique_name = g_dbus_proxy_get_name_owner (G_DBUS_PROXY (factory)); + + for (GList *lw = options->initial_windows; lw != nullptr; lw = lw->next) + { + InitialWindow *iw = (InitialWindow*)lw->data; + + g_assert_nonnull (iw); + + guint window_id = 0; + + gs_free char *previous_screen_object_path = nullptr; + if (iw->implicit_first_window) + previous_screen_object_path = g_strdup (parent_screen_object_path); + + /* Now add the tabs */ + for (GList *lt = iw->tabs; lt != nullptr; lt = lt->next) + { + InitialTab *it = (InitialTab*)lt->data; + g_assert_nonnull (it); + + GVariantBuilder builder; + g_variant_builder_init (&builder, G_VARIANT_TYPE ("a{sv}")); + + terminal_client_append_create_instance_options (&builder, + options->display_name, + options->startup_id, + options->activation_token, + iw->geometry, + iw->role, + it->profile ? it->profile : options->default_profile, + encoding, + it->title ? it->title : options->default_title, + it->active, + iw->start_maximized, + iw->start_fullscreen); + + /* This will be used to apply missing defaults */ + if (parent_screen_object_path != nullptr) + g_variant_builder_add (&builder, "{sv}", + "parent-screen", g_variant_new_object_path (parent_screen_object_path)); + + /* This will be used to get the parent window */ + if (previous_screen_object_path) + g_variant_builder_add (&builder, "{sv}", + "window-from-screen", g_variant_new_object_path (previous_screen_object_path)); + if (window_id) + g_variant_builder_add (&builder, "{sv}", + "window-id", g_variant_new_uint32 (window_id)); + /* Restored windows shouldn't demand attention; see bug #586308. */ + if (iw->source_tag == SOURCE_SESSION) + g_variant_builder_add (&builder, "{sv}", + "present-window", g_variant_new_boolean (FALSE)); + if (options->zoom_set || it->zoom_set) + g_variant_builder_add (&builder, "{sv}", + "zoom", g_variant_new_double (it->zoom_set ? it->zoom : options->zoom)); + if (iw->force_menubar_state) + g_variant_builder_add (&builder, "{sv}", + "show-menubar", g_variant_new_boolean (iw->menubar_state)); + + gs_free_error GError *err = nullptr; + gs_free char *object_path = nullptr; + if (!terminal_factory_call_create_instance_sync + (factory, + g_variant_builder_end (&builder), + &object_path, + nullptr /* cancellable */, + &err)) { + if (handle_create_instance_error (service_name, err)) + return FALSE; + else + continue; /* Continue processing the remaining options! */ + } + + /* Deprecated and not working on new server anymore */ + char *p = strstr (object_path, "/window/"); + if (p) { + char *end = nullptr; + guint64 value; + + errno = 0; + p += strlen ("/window/"); + value = g_ascii_strtoull (p, &end, 10); + if (errno == 0 && end != p && *end == '/') + window_id = (guint) value; + } + + g_free (previous_screen_object_path); + previous_screen_object_path = g_strdup (object_path); + + gs_unref_object TerminalReceiver *receiver = + terminal_receiver_proxy_new_for_bus_sync (G_BUS_TYPE_SESSION, + GDBusProxyFlags(G_DBUS_PROXY_FLAGS_DO_NOT_LOAD_PROPERTIES | + (it->wait ? 0 : G_DBUS_PROXY_FLAGS_DO_NOT_CONNECT_SIGNALS)), + factory_unique_name, + object_path, + nullptr /* cancellable */, + &err); + if (receiver == nullptr) { + if (handle_create_receiver_proxy_error (service_name, err)) + return FALSE; + else + continue; /* Continue processing the remaining options! */ + } + + g_variant_builder_init (&builder, G_VARIANT_TYPE ("a{sv}")); + + char **argv = it->exec_argv ? it->exec_argv : options->exec_argv; + int argc = argv ? g_strv_length (argv) : 0; + + PassFdElement *fd_array = it->fd_array ? (PassFdElement*)it->fd_array->data : nullptr; + gsize fd_array_len = it->fd_array ? it->fd_array->len : 0; + + terminal_client_append_exec_options (&builder, + !options->no_environment, + it->working_dir ? it->working_dir + : options->default_working_dir, + fd_array, fd_array_len, + argc == 0); + + if (!terminal_receiver_call_exec_sync (receiver, + g_variant_builder_end (&builder), + g_variant_new_bytestring_array ((const char * const *) argv, argc), + it->fd_list, nullptr /* outfdlist */, + nullptr /* cancellable */, + &err)) { + if (handle_exec_error (service_name, err)) + return FALSE; + else + continue; /* Continue processing the remaining options! */ + } + + if (it->wait) + gs_transfer_out_value (wait_for_receiver, &receiver); + + if (options->print_environment) + g_print ("%s=%s\n", TERMINAL_ENV_SCREEN, object_path); + } + } + + return TRUE; +} + +int +main (int argc, char **argv) +{ + int exit_code = EXIT_FAILURE; + + g_log_set_writer_func (terminal_log_writer, nullptr, nullptr); + + g_set_prgname ("gnome-terminal"); + + setlocale (LC_ALL, ""); + + terminal_i18n_init (TRUE); + + _terminal_debug_init (); + + gs_free_error GError *error = nullptr; + gs_free_options TerminalOptions *options = terminal_options_parse (&argc, &argv, &error); + if (options == nullptr) { + terminal_printerr (_("Failed to parse arguments: %s\n"), error->message); + return exit_code; + } + + g_set_application_name (_("Terminal")); + + gs_unref_object TerminalFactory *factory = nullptr; + gs_free char *service_name = nullptr; + gs_free char *parent_screen_object_path = nullptr; + if (!factory_proxy_new (options, + &factory, + &service_name, + &parent_screen_object_path, + &error)) + return exit_code; + + if (options->print_environment) { + const char *name_owner = g_dbus_proxy_get_name_owner (G_DBUS_PROXY (factory)); + if (name_owner != nullptr) + g_print ("%s=%s\n", TERMINAL_ENV_SERVICE_NAME, name_owner); + else + return exit_code; + } + + TerminalReceiver *receiver = nullptr; + if (!handle_options (options, factory, service_name, parent_screen_object_path, &receiver)) + return exit_code; + + if (receiver != nullptr) { + exit_code = run_receiver (factory, receiver); + g_object_unref (receiver); + } else + exit_code = EXIT_SUCCESS; + + return exit_code; +} |