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542 lines
17 KiB
C
542 lines
17 KiB
C
/*
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* Copyright © 2010 Codethink Limited
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* licence or (at your option) any later version.
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*
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* This library 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307,
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* USA.
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*
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* Authors: Ryan Lortie <desrt@desrt.ca>
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*/
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#include "config.h"
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#include "gapplicationcommandline.h"
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#include "glibintl.h"
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#include <string.h>
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#include <stdio.h>
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G_DEFINE_TYPE (GApplicationCommandLine, g_application_command_line, G_TYPE_OBJECT)
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/**
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* SECTION:gapplicationcommandline
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* @title: GApplicationCommandLine
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* @short_description: A command-line invocation of an application
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* @see_also: #GApplication
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*
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* #GApplicationCommandLine represents a command-line invocation of
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* an application. It is created by #GApplication and emitted
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* in the #GApplication::command-line signal and virtual function.
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*
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* The class contains the list of arguments that the program was invoked
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* with. It is also possible to query if the commandline invocation was
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* local (ie: the current process is running in direct response to the
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* invocation) or remote (ie: some other process forwarded the
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* commandline to this process).
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*
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* The exit status of the originally-invoked process may be set and
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* messages can be printed to stdout or stderr of that process. The
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* lifecycle of the originally-invoked process is tied to the lifecycle
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* of this object (ie: the process exits when the last reference is
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* dropped).
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*
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* <example id="gapplication-example-cmdline"><title>Handling commandline arguments with GApplication</title>
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* <programlisting>
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* <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gapplication-example-cmdline.c">
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* <xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback>
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* </xi:include>
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* </programlisting>
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* </example>
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*
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* <example id="gapplication-example-cmdline2"><title>Complicated commandline handling</title>
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* <programlisting>
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* <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" parse="text" href="../../../../gio/tests/gapplication-example-cmdline2.c">
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* <xi:fallback>FIXME: MISSING XINCLUDE CONTENT</xi:fallback>
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* </xi:include>
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* </programlisting>
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* </example>
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**/
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enum
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{
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PROP_NONE,
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PROP_ARGUMENTS,
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PROP_PLATFORM_DATA,
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PROP_IS_REMOTE
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};
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struct _GApplicationCommandLinePrivate
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{
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GVariant *platform_data;
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GVariant *arguments;
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GVariant *cwd;
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const gchar **environ;
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gint exit_status;
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};
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/* All subclasses represent remote invocations of some kind. */
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#define IS_REMOTE(cmdline) (G_TYPE_FROM_INSTANCE (cmdline) != \
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G_TYPE_APPLICATION_COMMAND_LINE)
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static void
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grok_platform_data (GApplicationCommandLine *cmdline)
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{
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GVariantIter iter;
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const gchar *key;
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GVariant *value;
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g_variant_iter_init (&iter, cmdline->priv->platform_data);
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while (g_variant_iter_loop (&iter, "{&sv}", &key, &value))
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if (strcmp (key, "cwd") == 0)
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{
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if (!cmdline->priv->cwd)
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cmdline->priv->cwd = g_variant_ref (value);
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}
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else if (strcmp (key, "environ") == 0)
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{
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if (!cmdline->priv->environ)
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cmdline->priv->environ =
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g_variant_get_bytestring_array (value, NULL);
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}
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}
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static void
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g_application_command_line_real_print_literal (GApplicationCommandLine *cmdline,
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const gchar *message)
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{
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g_print ("%s\n", message);
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}
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static void
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g_application_command_line_real_printerr_literal (GApplicationCommandLine *cmdline,
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const gchar *message)
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{
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g_printerr ("%s\n", message);
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}
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static void
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g_application_command_line_get_property (GObject *object,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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GApplicationCommandLine *cmdline = G_APPLICATION_COMMAND_LINE (object);
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switch (prop_id)
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{
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case PROP_ARGUMENTS:
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g_value_set_variant (value, cmdline->priv->arguments);
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break;
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case PROP_PLATFORM_DATA:
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g_value_set_variant (value, cmdline->priv->platform_data);
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break;
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case PROP_IS_REMOTE:
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g_value_set_boolean (value, IS_REMOTE (cmdline));
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break;
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default:
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g_assert_not_reached ();
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}
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}
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static void
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g_application_command_line_set_property (GObject *object,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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GApplicationCommandLine *cmdline = G_APPLICATION_COMMAND_LINE (object);
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switch (prop_id)
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{
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case PROP_ARGUMENTS:
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g_assert (cmdline->priv->arguments == NULL);
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cmdline->priv->arguments = g_value_dup_variant (value);
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break;
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case PROP_PLATFORM_DATA:
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g_assert (cmdline->priv->platform_data == NULL);
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cmdline->priv->platform_data = g_value_dup_variant (value);
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if (cmdline->priv->platform_data != NULL)
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grok_platform_data (cmdline);
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break;
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default:
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g_assert_not_reached ();
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}
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}
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static void
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g_application_command_line_finalize (GObject *object)
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{
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GApplicationCommandLine *cmdline = G_APPLICATION_COMMAND_LINE (object);
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if (cmdline->priv->platform_data)
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g_variant_unref (cmdline->priv->platform_data);
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if (cmdline->priv->arguments)
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g_variant_unref (cmdline->priv->arguments);
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if (cmdline->priv->cwd)
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g_variant_unref (cmdline->priv->cwd);
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G_OBJECT_CLASS (g_application_command_line_parent_class)
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->finalize (object);
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}
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static void
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g_application_command_line_init (GApplicationCommandLine *cmdline)
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{
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cmdline->priv =
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G_TYPE_INSTANCE_GET_PRIVATE (cmdline,
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G_TYPE_APPLICATION_COMMAND_LINE,
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GApplicationCommandLinePrivate);
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}
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static void
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g_application_command_line_class_init (GApplicationCommandLineClass *class)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (class);
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object_class->get_property = g_application_command_line_get_property;
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object_class->set_property = g_application_command_line_set_property;
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object_class->finalize = g_application_command_line_finalize;
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class->printerr_literal = g_application_command_line_real_printerr_literal;
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class->print_literal = g_application_command_line_real_print_literal;
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g_object_class_install_property (object_class, PROP_ARGUMENTS,
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g_param_spec_variant ("arguments",
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P_("Commandline arguments"),
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P_("The commandline that caused this ::command-line signal emission"),
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G_VARIANT_TYPE_BYTESTRING_ARRAY, NULL,
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G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY |
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G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (object_class, PROP_PLATFORM_DATA,
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g_param_spec_variant ("platform-data",
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P_("Platform data"),
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P_("Platform-specific data for the commandline"),
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G_VARIANT_TYPE ("a{sv}"), NULL,
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G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY |
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G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (object_class, PROP_IS_REMOTE,
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g_param_spec_boolean ("is-remote",
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P_("Is remote"),
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P_("TRUE if this is a remote commandline"),
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FALSE,
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G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
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g_type_class_add_private (class, sizeof (GApplicationCommandLinePrivate));
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}
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/**
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* g_application_command_line_get_arguments:
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* @cmdline: a #GApplicationCommandLine
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* @argc: the length of the arguments array, or %NULL
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*
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* Gets the list of arguments that was passed on the command line.
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*
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* The strings in the array may contain non-utf8 data.
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*
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* The return value is %NULL-terminated and should be freed using
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* g_strfreev().
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*
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* Returns: the string array containing the arguments (the argv)
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*
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* Since: 2.28
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**/
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gchar **
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g_application_command_line_get_arguments (GApplicationCommandLine *cmdline,
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int *argc)
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{
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gchar **argv;
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gsize len;
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g_return_val_if_fail (G_IS_APPLICATION_COMMAND_LINE (cmdline), NULL);
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argv = g_variant_dup_bytestring_array (cmdline->priv->arguments, &len);
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if (argc)
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*argc = len;
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return argv;
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}
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/**
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* g_application_command_line_get_cwd:
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* @cmdline: a #GApplicationCommandLine
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*
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* Gets the working directory of the command line invocation. The
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* string may contain non-utf8 data.
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*
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* It is possible that the remote application did not send a working
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* directory, so this may be %NULL.
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*
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* The return value should not be modified or freed and is valid for as
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* long as @cmdline exists.
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*
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* Returns: the current directory, or %NULL
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*
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* Since: 2.28
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**/
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const gchar *
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g_application_command_line_get_cwd (GApplicationCommandLine *cmdline)
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{
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if (cmdline->priv->cwd)
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return g_variant_get_bytestring (cmdline->priv->cwd);
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else
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return NULL;
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}
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/**
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* g_application_command_line_get_environ:
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* @cmdline: a #GApplicationCommandLine
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*
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* Gets the contents of the 'environ' variable of the command line
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* invocation, as would be returned by g_get_environ(). The strings may
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* contain non-utf8 data.
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*
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* The remote application usually does not send an environment. Use
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* %G_APPLICATION_SEND_ENVIRONMENT to affect that. Even with this flag
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* set it is possible that the environment is still not available (due
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* to invocation messages from other applications).
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*
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* The return value should not be modified or freed and is valid for as
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* long as @cmdline exists.
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*
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* Returns: the environment strings, or %NULL if they were not sent
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*
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* Since: 2.28
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**/
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const gchar * const *
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g_application_command_line_get_environ (GApplicationCommandLine *cmdline)
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{
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return cmdline->priv->environ;
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}
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/**
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* g_application_command_line_getenv:
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* @cmdline: a #GApplicationCommandLine
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* @name: the environment variable to get
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*
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* Gets the value of a particular environment variable of the command
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* line invocation, as would be returned by g_getenv(). The strings may
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* contain non-utf8 data.
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*
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* The remote application usually does not send an environment. Use
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* %G_APPLICATION_SEND_ENVIRONMENT to affect that. Even with this flag
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* set it is possible that the environment is still not available (due
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* to invocation messages from other applications).
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*
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* The return value should not be modified or freed and is valid for as
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* long as @cmdline exists.
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*
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* Returns: the value of the variable, or %NULL if unset or unsent
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*
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* Since: 2.28
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**/
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const gchar *
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g_application_command_line_getenv (GApplicationCommandLine *cmdline,
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const gchar *name)
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{
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gint length = strlen (name);
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gint i;
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/* TODO: expand on windows */
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if (cmdline->priv->environ)
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for (i = 0; cmdline->priv->environ[i]; i++)
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if (strncmp (cmdline->priv->environ[i], name, length) == 0 &&
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cmdline->priv->environ[i][length] == '=')
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return cmdline->priv->environ[i] + length + 1;
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return NULL;
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}
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/**
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* g_application_command_line_get_is_remote:
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* @cmdline: a #GApplicationCommandLine
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*
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* Determines if @cmdline represents a remote invocation.
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*
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* Returns: %TRUE if the invocation was remote
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*
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* Since: 2.28
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**/
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gboolean
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g_application_command_line_get_is_remote (GApplicationCommandLine *cmdline)
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{
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return IS_REMOTE (cmdline);
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}
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/**
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* g_application_command_line_print:
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* @cmdline: a #GApplicationCommandLine
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* @format: a printf-style format string
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* @...: arguments, as per @format
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*
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* Formats a message and prints it using the stdout print handler in the
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* invoking process.
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*
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* If @cmdline is a local invocation then this is exactly equivalent to
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* g_print(). If @cmdline is remote then this is equivalent to calling
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* g_print() in the invoking process.
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*
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* Since: 2.28
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**/
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void
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g_application_command_line_print (GApplicationCommandLine *cmdline,
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const gchar *format,
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...)
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{
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gchar *message;
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va_list ap;
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g_return_if_fail (G_IS_APPLICATION_COMMAND_LINE (cmdline));
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g_return_if_fail (format != NULL);
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va_start (ap, format);
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message = g_strdup_vprintf (format, ap);
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va_end (ap);
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G_APPLICATION_COMMAND_LINE_GET_CLASS (cmdline)
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->print_literal (cmdline, message);
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g_free (message);
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}
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/**
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* g_application_command_line_printerr:
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* @cmdline: a #GApplicationCommandLine
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* @format: a printf-style format string
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* @...: arguments, as per @format
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*
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* Formats a message and prints it using the stderr print handler in the
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* invoking process.
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*
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* If @cmdline is a local invocation then this is exactly equivalent to
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* g_printerr(). If @cmdline is remote then this is equivalent to
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* calling g_printerr() in the invoking process.
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*
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* Since: 2.28
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**/
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void
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g_application_command_line_printerr (GApplicationCommandLine *cmdline,
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const gchar *format,
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...)
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{
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gchar *message;
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va_list ap;
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g_return_if_fail (G_IS_APPLICATION_COMMAND_LINE (cmdline));
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g_return_if_fail (format != NULL);
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va_start (ap, format);
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message = g_strdup_vprintf (format, ap);
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va_end (ap);
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G_APPLICATION_COMMAND_LINE_GET_CLASS (cmdline)
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->printerr_literal (cmdline, message);
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g_free (message);
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}
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/**
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* g_application_command_line_set_exit_status:
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* @cmdline: a #GApplicationCommandLine
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* @exit_status: the exit status
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*
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* Sets the exit status that will be used when the invoking process
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* exits.
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*
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* The return value of the #GApplication::command-line signal is
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* passed to this function when the handler returns. This is the usual
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* way of setting the exit status.
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*
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* In the event that you want the remote invocation to continue running
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* and want to decide on the exit status in the future, you can use this
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* call. For the case of a remote invocation, the remote process will
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* typically exit when the last reference is dropped on @cmdline. The
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* exit status of the remote process will be equal to the last value
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* that was set with this function.
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*
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* In the case that the commandline invocation is local, the situation
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* is slightly more complicated. If the commandline invocation results
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* in the mainloop running (ie: because the use-count of the application
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* increased to a non-zero value) then the application is considered to
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* have been 'successful' in a certain sense, and the exit status is
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* always zero. If the application use count is zero, though, the exit
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* status of the local #GApplicationCommandLine is used.
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*
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* Since: 2.28
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**/
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void
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g_application_command_line_set_exit_status (GApplicationCommandLine *cmdline,
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int exit_status)
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{
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g_return_if_fail (G_IS_APPLICATION_COMMAND_LINE (cmdline));
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cmdline->priv->exit_status = exit_status;
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}
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/**
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* g_application_command_line_get_exit_status:
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* @cmdline: a #GApplicationCommandLine
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*
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* Gets the exit status of @cmdline. See
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* g_application_command_line_set_exit_status() for more information.
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*
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* Returns: the exit status
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*
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* Since: 2.28
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**/
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int
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g_application_command_line_get_exit_status (GApplicationCommandLine *cmdline)
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{
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g_return_val_if_fail (G_IS_APPLICATION_COMMAND_LINE (cmdline), -1);
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return cmdline->priv->exit_status;
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}
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/**
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* g_application_command_line_get_platform_data:
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* @cmdline: #GApplicationCommandLine
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*
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* Gets the platform data associated with the invocation of @cmdline.
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|
*
|
|
* This is a #GVariant dictionary containing information about the
|
|
* context in which the invocation occured. It typically contains
|
|
* information like the current working directory and the startup
|
|
* notification ID.
|
|
*
|
|
* For local invocation, it will be %NULL.
|
|
*
|
|
* Returns: the platform data, or %NULL
|
|
*
|
|
* Since: 2.28
|
|
**/
|
|
GVariant *
|
|
g_application_command_line_get_platform_data (GApplicationCommandLine *cmdline)
|
|
{
|
|
g_return_val_if_fail (G_IS_APPLICATION_COMMAND_LINE (cmdline), NULL);
|
|
|
|
if (cmdline->priv->platform_data)
|
|
return g_variant_ref (cmdline->priv->platform_data);
|
|
else
|
|
return NULL;
|
|
}
|