diff options
Diffstat (limited to 'command/src')
| -rw-r--r-- | command/src/Makefile.am | 44 | ||||
| -rw-r--r-- | command/src/command.c | 494 | ||||
| -rw-r--r-- | command/src/ma-command.c | 417 | ||||
| -rw-r--r-- | command/src/ma-command.h | 43 |
4 files changed, 998 insertions, 0 deletions
diff --git a/command/src/Makefile.am b/command/src/Makefile.am new file mode 100644 index 00000000..d0d2065a --- /dev/null +++ b/command/src/Makefile.am @@ -0,0 +1,44 @@ +NULL = + +AM_CPPFLAGS = \ + $(MATE_APPLETS4_CFLAGS) \ + -I$(srcdir) \ + $(DISABLE_DEPRECATED_CFLAGS) \ + $(NULL) + +libexec_PROGRAMS = command-applet + +BUILT_SOURCES = \ + command-resources.c \ + command-resources.h \ + $(NULL) + +nodist_command_applet_SOURCES = \ + $(BUILT_SOURCES) \ + $(NULL) + +command_applet_SOURCES = \ + command.c \ + ma-command.c \ + ma-command.h \ + $(NULL) + +command_applet_LDADD = \ + $(MATE_APPLETS4_LIBS) \ + $(NULL) + +command_applet_CFLAGS = \ + $(WARN_CFLAGS) \ + $(NULL) + +command-resources.c: $(srcdir)/../data/command-resources.gresource.xml $(shell $(GLIB_COMPILE_RESOURCES) --sourcedir=$(srcdir)/../data --generate-dependencies $(srcdir)/../data/command-resources.gresource.xml) + $(AM_V_GEN)$(GLIB_COMPILE_RESOURCES) --target=$@ --sourcedir=$(srcdir)/../data --generate --c-name command $< + +command-resources.h: $(srcdir)/../data/command-resources.gresource.xml $(shell $(GLIB_COMPILE_RESOURCES) --sourcedir=$(srcdir)/../data --generate-dependencies $(srcdir)/../data/command-resources.gresource.xml) + $(AM_V_GEN)$(GLIB_COMPILE_RESOURCES) --target=$@ --sourcedir=$(srcdir)/../data --generate --c-name command $< + +CLEANFILES = \ + $(BUILT_SOURCES) \ + $(NULL) + +-include $(top_srcdir)/git.mk diff --git a/command/src/command.c b/command/src/command.c new file mode 100644 index 00000000..f53bef43 --- /dev/null +++ b/command/src/command.c @@ -0,0 +1,494 @@ +/* command.c: + * + * Copyright (C) 2013-2014 Stefano Karapetsas + * + * This file is part of MATE Applets. + * + * 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 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + * Authors: + * Stefano Karapetsas <[email protected]> + */ + +#include <config.h> + +#include <glib.h> +#include <gmodule.h> +#include <glib/gi18n.h> +#include <gio/gio.h> +#include <gtk/gtk.h> + +#include <mate-panel-applet.h> +#include <mate-panel-applet-gsettings.h> +#include "ma-command.h" + +/* Applet constants */ +#define APPLET_ICON "utilities-terminal" +#define ERROR_OUTPUT "#" + +/* GSettings constants */ +#define COMMAND_SCHEMA "org.mate.panel.applet.command" +#define COMMAND_KEY "command" +#define INTERVAL_KEY "interval" +#define SHOW_ICON_KEY "show-icon" +#define WIDTH_KEY "width" + +/* GKeyFile constants */ +#define GK_COMMAND_GROUP "Command" +#define GK_COMMAND_OUTPUT "Output" +#define GK_COMMAND_ICON "Icon" + +#define GET_WIDGET(x) (GTK_WIDGET (gtk_builder_get_object (builder, (x)))) +#define GET_DIALOG(x) (GTK_DIALOG (gtk_builder_get_object (builder, (x)))) + +typedef struct +{ + MatePanelApplet *applet; + + GSettings *settings; + + GtkLabel *label; + GtkImage *image; + GtkBox *box; + MaCommand *command; + GCancellable *cancellable; + gboolean running; + + gchar *cmdline; + gint interval; + gint width; + + guint timeout_id; +} CommandApplet; + +static void command_about_callback (GtkAction *action, CommandApplet *command_applet); +static void command_settings_callback (GtkAction *action, CommandApplet *command_applet); +static gboolean command_execute (CommandApplet *command_applet); +static gboolean command_text_changed (GtkWidget *widget, GdkEvent *event, gpointer user_data); +static void interval_value_changed (GtkSpinButton *spin_button, gpointer user_data); +static void width_value_changed (GtkSpinButton *spin_button, gpointer user_data); +static void command_async_ready_callback (GObject *source_object, GAsyncResult *res, gpointer user_data); +static gboolean timeout_callback (CommandApplet *command_applet); + +static const GtkActionEntry applet_menu_actions [] = { + { "Preferences", "document-properties", N_("_Preferences"), NULL, NULL, G_CALLBACK (command_settings_callback) }, + { "About", "help-about", N_("_About"), NULL, NULL, G_CALLBACK (command_about_callback) } +}; + +static char *ui = "<menuitem name='Item 1' action='Preferences' />" + "<menuitem name='Item 2' action='About' />"; + +static void +command_applet_destroy (MatePanelApplet *applet_widget, CommandApplet *command_applet) +{ + g_assert (command_applet); + + if (command_applet->timeout_id != 0) + { + g_source_remove (command_applet->timeout_id); + command_applet->timeout_id = 0; + } + + if (command_applet->cmdline != NULL) + { + g_free (command_applet->cmdline); + command_applet->cmdline = NULL; + } + + if (command_applet->command != NULL) + { + g_object_unref (command_applet->command); + } + + g_object_unref (command_applet->settings); +} + +/* Show the about dialog */ +static void +command_about_callback (GtkAction *action, CommandApplet *command_applet) +{ + const char* authors[] = { "Stefano Karapetsas <[email protected]>", NULL }; + + gtk_show_about_dialog(NULL, + "title", _("About Command Applet"), + "version", VERSION, + "copyright", _("Copyright \xc2\xa9 2013-2014 Stefano Karapetsas\n" + "Copyright \xc2\xa9 2015-2020 MATE developers"), + "authors", authors, + "comments", _("Shows the output of a command"), + "translator-credits", _("translator-credits"), + "logo-icon-name", APPLET_ICON, + NULL ); +} + +static gboolean +command_text_changed (GtkWidget *widget, GdkEvent *event, gpointer user_data) +{ + const gchar *text; + CommandApplet *command_applet; + + command_applet = (CommandApplet*) user_data; + text = gtk_entry_get_text (GTK_ENTRY(widget)); + if (g_strcmp0(command_applet->cmdline, text) == 0) { + return TRUE; + } + + if (strlen (text) == 0) { + gtk_label_set_text (command_applet->label, ERROR_OUTPUT); + return TRUE; + } + + g_settings_set_string (command_applet->settings, COMMAND_KEY, text); + return TRUE; +} + +static void interval_value_changed (GtkSpinButton *spin_button, gpointer user_data) +{ + gint value; + CommandApplet *command_applet; + + command_applet = (CommandApplet*) user_data; + value = gtk_spin_button_get_value_as_int (spin_button); + if (command_applet->interval == value) { + return; + } + + g_settings_set_int (command_applet->settings, INTERVAL_KEY, value); +} + +static void width_value_changed (GtkSpinButton *spin_button, gpointer user_data) +{ + gint value; + CommandApplet *command_applet; + + command_applet = (CommandApplet*) user_data; + value = gtk_spin_button_get_value_as_int (spin_button); + if (command_applet->width == value) { + return; + } + + g_settings_set_int (command_applet->settings, WIDTH_KEY, value); +} + +/* Show the preferences dialog */ +static void +command_settings_callback (GtkAction *action, CommandApplet *command_applet) +{ + GtkDialog *dialog; + GtkBuilder *builder; + + builder = gtk_builder_new_from_resource ("/org/mate/mate-applets/command/command-preferences.ui"); + + dialog = GET_DIALOG ("preferences_dialog"); + + g_settings_bind (command_applet->settings, COMMAND_KEY, GET_WIDGET ("command_entry"), "text", G_SETTINGS_BIND_GET_NO_CHANGES); + g_settings_bind (command_applet->settings, INTERVAL_KEY, GET_WIDGET ("interval_spinbutton"), "value", G_SETTINGS_BIND_GET_NO_CHANGES); + g_settings_bind (command_applet->settings, WIDTH_KEY, GET_WIDGET ("width_spinbutton"), "value", G_SETTINGS_BIND_GET_NO_CHANGES); + g_settings_bind (command_applet->settings, SHOW_ICON_KEY, GET_WIDGET ("show_icon_check"), "active", G_SETTINGS_BIND_DEFAULT); + + /* signals */ + gtk_builder_add_callback_symbols (builder, + "on_command_entry_focus_out_event", G_CALLBACK (command_text_changed), + "on_interval_spinbutton_value_changed", G_CALLBACK (interval_value_changed), + "on_width_spinbutton_value_changed", G_CALLBACK (width_value_changed), + NULL); + gtk_builder_connect_signals (builder, command_applet); + g_signal_connect (dialog, "response", G_CALLBACK (gtk_widget_destroy), dialog); + + g_object_unref (builder); + + gtk_widget_show_all (GTK_WIDGET (dialog)); +} + +/* GSettings signal callbacks */ +static void +settings_command_changed (GSettings *settings, gchar *key, CommandApplet *command_applet) +{ + GError *error = NULL; + gchar *cmdline; + gchar **argv; + + cmdline = g_settings_get_string (command_applet->settings, COMMAND_KEY); + if (strlen (cmdline) == 0 || g_strcmp0(command_applet->cmdline, cmdline) == 0) + return; + + if (!g_shell_parse_argv (cmdline, NULL, &argv, &error)) + { + gtk_label_set_text (command_applet->label, ERROR_OUTPUT); + g_clear_error (&error); + return; + } + g_strfreev(argv); + + if (command_applet->cmdline) + g_free (command_applet->cmdline); + command_applet->cmdline = cmdline; + + command_execute (command_applet); +} + +static void +settings_width_changed (GSettings *settings, gchar *key, CommandApplet *command_applet) +{ + gint width; + + width = g_settings_get_int (command_applet->settings, WIDTH_KEY); + + if (command_applet->width != width) { + command_applet->width = width; + } +} + +static void +settings_interval_changed (GSettings *settings, gchar *key, CommandApplet *command_applet) +{ + gint interval; + + interval = g_settings_get_int (command_applet->settings, INTERVAL_KEY); + + /* minimum interval */ + if (interval < 1) + interval = 1; + + if (command_applet->interval == interval) { + return; + } + command_applet->interval = interval; + + command_execute (command_applet); +} + +static void +process_command_output (CommandApplet *command_applet, gchar *output) +{ + gtk_widget_set_tooltip_text (GTK_WIDGET (command_applet->label), command_applet->cmdline); + + if ((output == NULL) || (output[0] == '\0')) + { + gtk_label_set_text (command_applet->label, ERROR_OUTPUT); + return; + } + + /* check if output is a custom GKeyFile */ + if (g_str_has_prefix (output, "[Command]")) + { + GKeyFile *file = g_key_file_new (); + if (g_key_file_load_from_data (file, output, -1, G_KEY_FILE_NONE, NULL)) + { + gchar *goutput = g_key_file_get_string (file, GK_COMMAND_GROUP, GK_COMMAND_OUTPUT, NULL); + gchar *icon = g_key_file_get_string (file, GK_COMMAND_GROUP, GK_COMMAND_ICON, NULL); + + if (goutput) + { + gtk_label_set_use_markup (command_applet->label, TRUE); + gtk_label_set_markup (command_applet->label, goutput); + } + + if (icon) + gtk_image_set_from_icon_name (command_applet->image, icon, GTK_ICON_SIZE_LARGE_TOOLBAR); + + g_free (goutput); + g_free (icon); + } + else + gtk_label_set_text (command_applet->label, ERROR_OUTPUT); + + g_key_file_free (file); + } + else + { + /* Remove leading and trailing whitespace */ + g_strstrip (output); + + /* check output length */ + if (g_utf8_strlen (output, strlen(output)) > command_applet->width) + { + *g_utf8_offset_to_pointer(output, command_applet->width) = '\0'; + } + + gtk_label_set_text (command_applet->label, output); + } +} + +static void command_async_ready_callback (GObject *source_object, GAsyncResult *res, gpointer user_data) +{ + gchar *output; + GError *error = NULL; + CommandApplet *command_applet; + + command_applet = (CommandApplet*) user_data; + + output = ma_command_run_finish (command_applet->command, res, &error); + if (error == NULL) { + process_command_output (command_applet, output); + } else { + if (!g_error_matches (error, G_IO_ERROR, G_IO_ERROR_FAILED)) { + gtk_label_set_text (command_applet->label, ERROR_OUTPUT); + } + g_error_free (error); + } + g_free (output); + command_applet->running = FALSE; +} + +static gboolean timeout_callback (CommandApplet *command_applet) +{ + /* command is empty, wait for next timer execution */ + if (strlen (command_applet->cmdline) == 0) { + return G_SOURCE_CONTINUE; + } + + /* command running, wait for next timer execution */ + if (command_applet->running) { + return G_SOURCE_CONTINUE; + } else { + gchar **argv; + GError *error = NULL; + if (!g_shell_parse_argv (command_applet->cmdline, NULL, &argv, &error)) { + gtk_label_set_text (command_applet->label, ERROR_OUTPUT); + g_clear_error (&error); + return G_SOURCE_CONTINUE; + } + g_strfreev(argv); + command_execute (command_applet); + return G_SOURCE_REMOVE; + } +} + +static gboolean +command_execute (CommandApplet *command_applet) +{ + /* stop current timer */ + if (command_applet->timeout_id != 0) + { + g_source_remove (command_applet->timeout_id); + command_applet->timeout_id = 0; + } + + if (command_applet->running) { + g_cancellable_cancel (command_applet->cancellable); + } + + g_object_set (G_OBJECT(command_applet->command), "command", command_applet->cmdline, NULL); + ma_command_run_async (command_applet->command, + command_applet->cancellable, + command_async_ready_callback, + command_applet); + if (!command_applet->running) { + command_applet->running = TRUE; + } + + if (g_cancellable_is_cancelled (command_applet->cancellable)) { + g_cancellable_reset (command_applet->cancellable); + } + + command_applet->timeout_id = g_timeout_add_seconds (command_applet->interval, + (GSourceFunc) timeout_callback, + command_applet); + return G_SOURCE_CONTINUE; +} + +static gboolean +command_applet_fill (MatePanelApplet* applet) +{ + CommandApplet *command_applet; + + g_set_application_name (_("Command Applet")); + gtk_window_set_default_icon_name (APPLET_ICON); + + mate_panel_applet_set_flags (applet, MATE_PANEL_APPLET_EXPAND_MINOR); + mate_panel_applet_set_background_widget (applet, GTK_WIDGET (applet)); + + command_applet = g_malloc0(sizeof(CommandApplet)); + command_applet->applet = applet; + command_applet->settings = mate_panel_applet_settings_new (applet, COMMAND_SCHEMA); + + command_applet->interval = g_settings_get_int (command_applet->settings, INTERVAL_KEY); + command_applet->cmdline = g_settings_get_string (command_applet->settings, COMMAND_KEY); + command_applet->width = g_settings_get_int (command_applet->settings, WIDTH_KEY); + command_applet->command = ma_command_new(command_applet->cmdline, NULL); + command_applet->cancellable = g_cancellable_new (); + + command_applet->box = GTK_BOX (gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0)); + command_applet->image = GTK_IMAGE (gtk_image_new_from_icon_name (APPLET_ICON, GTK_ICON_SIZE_LARGE_TOOLBAR)); + command_applet->label = GTK_LABEL (gtk_label_new (ERROR_OUTPUT)); + command_applet->timeout_id = 0; + + /* we add the Gtk label into the applet */ + gtk_box_pack_start (command_applet->box, + GTK_WIDGET (command_applet->image), + TRUE, TRUE, 0); + gtk_box_pack_start (command_applet->box, + GTK_WIDGET (command_applet->label), + TRUE, TRUE, 0); + + gtk_container_add (GTK_CONTAINER (applet), + GTK_WIDGET (command_applet->box)); + + gtk_widget_show_all (GTK_WIDGET (command_applet->applet)); + + g_signal_connect(G_OBJECT (command_applet->applet), "destroy", + G_CALLBACK (command_applet_destroy), + command_applet); + + /* GSettings signals */ + g_signal_connect(command_applet->settings, + "changed::" COMMAND_KEY, + G_CALLBACK (settings_command_changed), + command_applet); + g_signal_connect(command_applet->settings, + "changed::" INTERVAL_KEY, + G_CALLBACK (settings_interval_changed), + command_applet); + g_signal_connect(command_applet->settings, + "changed::" WIDTH_KEY, + G_CALLBACK (settings_width_changed), + command_applet); + g_settings_bind (command_applet->settings, + SHOW_ICON_KEY, + command_applet->image, + "visible", + G_SETTINGS_BIND_DEFAULT); + + /* set up context menu */ + GtkActionGroup *action_group = gtk_action_group_new ("Command Applet Actions"); + gtk_action_group_set_translation_domain (action_group, GETTEXT_PACKAGE); + gtk_action_group_add_actions (action_group, applet_menu_actions, + G_N_ELEMENTS (applet_menu_actions), command_applet); + mate_panel_applet_setup_menu (command_applet->applet, ui, action_group); + + /* first command execution */ + command_execute (command_applet); + return TRUE; +} + +/* this function, called by mate-panel, will create the applet */ +static gboolean +command_factory (MatePanelApplet* applet, const char* iid, gpointer data) +{ + gboolean retval = FALSE; + + if (!g_strcmp0 (iid, "CommandApplet")) + retval = command_applet_fill (applet); + + return retval; +} + +/* needed by mate-panel applet library */ +MATE_PANEL_APPLET_OUT_PROCESS_FACTORY("CommandAppletFactory", + PANEL_TYPE_APPLET, + "Command applet", + command_factory, + NULL) diff --git a/command/src/ma-command.c b/command/src/ma-command.c new file mode 100644 index 00000000..da0e8795 --- /dev/null +++ b/command/src/ma-command.c @@ -0,0 +1,417 @@ +/* + * Copyright (C) 2018 Alberts Muktupāvels + * + * 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 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 "ma-command.h" + +#define BUFFER_SIZE 64 + +struct _MaCommand +{ + GObject parent; + + gchar *command; + gchar **argv; +}; + +typedef struct +{ + GPid pid; + + GIOChannel *channel; + + GString *input; + + guint io_watch_id; + guint child_watch_id; +} CommandData; + +enum +{ + PROP_0, + + PROP_COMMAND, + + LAST_PROP +}; + +static GParamSpec *command_properties[LAST_PROP] = { NULL }; + +static void initable_iface_init (GInitableIface *iface); + +G_DEFINE_TYPE_WITH_CODE (MaCommand, ma_command, G_TYPE_OBJECT, + G_IMPLEMENT_INTERFACE (G_TYPE_INITABLE, + initable_iface_init)) + +static gboolean +read_cb (GIOChannel *source, + GIOCondition condition, + gpointer user_data) +{ + GTask *task; + CommandData *data; + gchar buffer[BUFFER_SIZE]; + gsize bytes_read; + GError *error; + GIOStatus status; + + task = (GTask *) user_data; + data = g_task_get_task_data (task); + + if (g_task_return_error_if_cancelled (task)) + { + g_object_unref (task); + + data->io_watch_id = 0; + + return G_SOURCE_REMOVE; + } + + error = NULL; + status = g_io_channel_read_chars (source, buffer, BUFFER_SIZE, + &bytes_read, &error); + + if (status == G_IO_STATUS_AGAIN) + { + g_clear_error (&error); + + return G_SOURCE_CONTINUE; + } + else if (status != G_IO_STATUS_NORMAL) + { + if (error != NULL) + { + g_task_return_error (task, error); + g_object_unref (task); + } + + data->io_watch_id = 0; + + return G_SOURCE_REMOVE; + } + + g_string_append_len (data->input, buffer, bytes_read); + + return G_SOURCE_CONTINUE; +} + +static void +child_watch_cb (GPid pid, + gint status, + gpointer user_data) +{ + GTask *task; + CommandData *data; + + task = (GTask *) user_data; + data = g_task_get_task_data (task); + + g_task_return_pointer (task, g_strdup (data->input->str), g_free); + g_object_unref (task); +} + +static void +cancelled_cb (GCancellable *cancellable, + gpointer user_data) +{ + GTask *task; + + task = G_TASK (user_data); + + g_object_unref (task); +} + +static void +command_data_free (gpointer user_data) +{ + CommandData *data; + + data = (CommandData *) user_data; + + if (data->pid != 0) + { + g_spawn_close_pid (data->pid); + data->pid = 0; + } + + if (data->channel != NULL) + { + g_io_channel_unref (data->channel); + data->channel = NULL; + } + + if (data->input != NULL) + { + g_string_free (data->input, TRUE); + data->input = NULL; + } + + if (data->io_watch_id != 0) + { + g_source_remove (data->io_watch_id); + data->io_watch_id = 0; + } + + if (data->child_watch_id != 0) + { + g_source_remove (data->child_watch_id); + data->child_watch_id = 0; + } + + g_free (data); +} + +static gboolean +ma_command_initable_init (GInitable *initable, + GCancellable *cancellable, + GError **error) +{ + MaCommand *command; + + command = MA_COMMAND (initable); + + if (command->command == NULL || *command->command == '\0') + { + g_set_error (error, G_IO_ERROR, G_IO_ERROR_INVALID_DATA, + "Empty command"); + + return FALSE; + } + + return TRUE; +} + +static void +initable_iface_init (GInitableIface *iface) +{ + iface->init = ma_command_initable_init; +} + +static void +ma_command_finalize (GObject *object) +{ + MaCommand *command; + + command = MA_COMMAND (object); + + g_clear_pointer (&command->command, g_free); + g_clear_pointer (&command->argv, g_strfreev); + + G_OBJECT_CLASS (ma_command_parent_class)->finalize (object); +} + +static void +ma_command_set_property (GObject *object, + guint property_id, + const GValue *value, + GParamSpec *pspec) +{ + MaCommand *command; + + command = MA_COMMAND (object); + + switch (property_id) + { + case PROP_COMMAND: + //g_assert (command->command == NULL); + command->command = g_value_dup_string (value); + if (command->argv && *command->argv != NULL) { + g_strfreev(command->argv); + } + g_shell_parse_argv (command->command, NULL, &command->argv, NULL); + break; + + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec); + break; + } +} + +static void +ma_command_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) +{ + MaCommand *command; + + command = MA_COMMAND (object); + + switch (prop_id) + { + case PROP_COMMAND: + g_value_set_string (value, command->command); + default: + G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); + break; + } +} + +static void +install_properties (GObjectClass *object_class) +{ + command_properties[PROP_COMMAND] = + g_param_spec_string ("command", "command", "command", + NULL, + G_PARAM_READWRITE); + + g_object_class_install_properties (object_class, LAST_PROP, + command_properties); +} + +static void +ma_command_class_init (MaCommandClass *command_class) +{ + GObjectClass *object_class; + + object_class = G_OBJECT_CLASS (command_class); + + object_class->finalize = ma_command_finalize; + object_class->set_property = ma_command_set_property; + object_class->get_property = ma_command_get_property; + + install_properties (object_class); +} + +static void +ma_command_init (MaCommand *command) +{ +} + +/** + * ma_command_new: + * @command: a command + * @error: (nullable): return location for an error, or %NULL + * + * Creates a new #MaCommand. + * + * Returns: (nullable): a newly allocated #MaCommand + */ +MaCommand * +ma_command_new (const gchar *command, + GError **error) +{ + return g_initable_new (MA_TYPE_COMMAND, NULL, error, + "command", command, + NULL); +} + +/** + * ma_command_run_async: + * @command: a #MaCommand + * @cancellable: (nullable): a #GCancellable or %NULL + * @callback: a #GAsyncReadyCallback to call when the request is satisfied + * @user_data: the data to pass to @callback + * + * Request an asynchronous read of output from command that was passed + * to ma_command_new(). + */ +void +ma_command_run_async (MaCommand *command, + GCancellable *cancellable, + GAsyncReadyCallback callback, + gpointer user_data) +{ + GTask *task; + CommandData *data; + GSpawnFlags spawn_flags; + gint command_stdout; + GError *error; + GIOChannel *channel; + GIOStatus status; + GIOCondition condition; + + g_return_if_fail (MA_IS_COMMAND (command)); + g_return_if_fail (callback != NULL); + + task = g_task_new (command, cancellable, callback, user_data); + g_task_set_source_tag (task, ma_command_run_async); + + if (cancellable) + { + g_signal_connect_object (cancellable, "cancelled", + G_CALLBACK (cancelled_cb), task, + G_CONNECT_AFTER); + } + + data = g_new0 (CommandData, 1); + g_task_set_task_data (task, data, command_data_free); + + spawn_flags = G_SPAWN_SEARCH_PATH | G_SPAWN_DO_NOT_REAP_CHILD; + error = NULL; + + if (!g_spawn_async_with_pipes (NULL, command->argv, NULL, spawn_flags, + NULL, NULL, &data->pid, NULL, &command_stdout, + NULL, &error)) + { + g_task_return_error (task, error); + g_object_unref (task); + + return; + } + + channel = data->channel = g_io_channel_unix_new (command_stdout); + g_io_channel_set_close_on_unref (channel, TRUE); + + g_assert (error == NULL); + status = g_io_channel_set_encoding (channel, NULL, &error); + + if (status != G_IO_STATUS_NORMAL) + { + g_task_return_error (task, error); + g_object_unref (task); + + return; + } + + g_assert (error == NULL); + status = g_io_channel_set_flags (channel, G_IO_FLAG_NONBLOCK, &error); + + if (status != G_IO_STATUS_NORMAL) + { + g_task_return_error (task, error); + g_object_unref (task); + + return; + } + + data->input = g_string_new (NULL); + + condition = G_IO_IN | G_IO_PRI | G_IO_ERR | G_IO_HUP; + data->io_watch_id = g_io_add_watch (channel, condition, read_cb, task); + + data->child_watch_id = g_child_watch_add (data->pid, child_watch_cb, task); +} + +/** + * ma_command_run_finish: + * @command: a #MaCommand + * @result: a #GAsyncResult + * @error: (nullable): return location for an error, or %NULL + * + * Finishes an operation started with ma_command_run_async(). + * + * Returns: %NULL if @error is set, otherwise output from command + */ +gchar * +ma_command_run_finish (MaCommand *command, + GAsyncResult *result, + GError **error) +{ + g_return_val_if_fail (MA_IS_COMMAND (command), NULL); + g_return_val_if_fail (g_task_is_valid (result, command), NULL); + g_return_val_if_fail (error == NULL || *error == NULL, NULL); + + return g_task_propagate_pointer (G_TASK (result), error); +} diff --git a/command/src/ma-command.h b/command/src/ma-command.h new file mode 100644 index 00000000..8fb51ab3 --- /dev/null +++ b/command/src/ma-command.h @@ -0,0 +1,43 @@ +/* + * Copyright (C) 2018 Alberts Muktupāvels + * + * 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 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/>. + */ + +#ifndef MA_COMMAND_H +#define MA_COMMAND_H + +#include <gio/gio.h> +#include <glib-object.h> + +G_BEGIN_DECLS + +#define MA_TYPE_COMMAND (ma_command_get_type ()) +G_DECLARE_FINAL_TYPE (MaCommand, ma_command, MA, COMMAND, GObject) + +MaCommand *ma_command_new (const gchar *command, + GError **error); + +void ma_command_run_async (MaCommand *command, + GCancellable *cancellable, + GAsyncReadyCallback callback, + gpointer user_data); + +gchar *ma_command_run_finish (MaCommand *command, + GAsyncResult *result, + GError **error); + +G_END_DECLS + +#endif |