initial draft of the RDA shared library

6 files changed, 390 insertions, 0 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
new file mode 100644
index 0000000..c770c54
--- /dev/null
+++ b/src/Makefile.am
@@ -0,0 +1,33 @@
+NULL =
+
+lib_LTLIBRARIES = librda.la
+
+CLEANFILES =
+DISTCLEANFILES =
+
+rda_headers =				\
+	rda.h				\
+	$(NULL)
+
+librdaincludedir = $(includedir)/rda
+librdainclude_HEADERS =			\
+	$(rda_headers)			\
+	$(NULL)
+
+librda_la_SOURCES =			\
+	$(rda_headers)			\
+	rda.c				\
+	rda_x2go.h			\
+	rda_x2go.c			\
+	$(NULL)
+
+librda_la_CFLAGS =			\
+	$(LIBRDA_CFLAGS)		\
+	$(NULL)
+
+librda_la_LIBADD =			\
+	$(LIBRDA_LIBS)			\
+	$(NULL)
+
+pkgconfig_DATA = rda.pc
+pkgconfigdir = $(libdir)/pkgconfig
diff --git a/src/rda.c b/src/rda.c
new file mode 100644
index 0000000..ce7b1af
--- /dev/null
+++ b/src/rda.c
@@ -0,0 +1,132 @@
+/* -*- Mode: C; c-set-style: linux indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+
+/* rda.c - Remote Desktop Awareness
+
+   Copyright (C) 2018 Mike Gabriel
+   All rights reserved.
+
+   The RDA Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The RDA Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the Mate Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+ */
+
+#include <config.h>
+#include <glib.h>
+#include <glib/gi18n.h>
+
+#include <rda.h>
+#include <rda_x2go.h>
+
+guint
+remote_technology = REMOTE_TECHNOLOGY_UNCHECKED;
+
+void
+rda_init (void)
+{
+	rda_session_is_remote();
+}
+
+gboolean
+rda_session_is_local(void)
+{
+	/*
+	 * FIXME: how can we detect that a desktop session is running locally?
+	 */
+	return (!rda_session_is_remote());
+}
+
+gboolean
+rda_session_is_remote (void)
+{
+	if (rda_session_is_x2go())
+		return TRUE;
+
+	/* possibly add more checks for other remote desktop technologies */
+
+	else if (rda_session_is_local())
+		remote_technology = REMOTE_TECHNOLOGY_NONE;
+
+	else
+		remote_technology = REMOTE_TECHNOLOGY_UNKNOWN;
+
+	return FALSE;
+}
+
+guint
+rda_get_remote_technology(void)
+{
+	if (remote_technology == REMOTE_TECHNOLOGY_UNCHECKED)
+		rda_init();
+
+	return remote_technology;
+}
+
+gchar *
+rda_get_remote_technology_name (void)
+{
+	if (remote_technology == REMOTE_TECHNOLOGY_UNCHECKED)
+		rda_init();
+
+	gchar* remote_technology_name;
+
+	switch(remote_technology) {
+
+		case REMOTE_TECHNOLOGY_NONE:
+			remote_technology_name = _("local");
+			break;
+
+		case REMOTE_TECHNOLOGY_X2GO:
+			remote_technology_name = _("X2Go");
+			break;
+
+		case REMOTE_TECHNOLOGY_UNKNOWN:
+			remote_technology_name = _("unknown");
+
+		default:
+			remote_technology_name = g_strdup("");
+
+	}
+
+	return remote_technology_name;
+}
+
+gboolean
+rda_session_can_be_suspended(void)
+{
+	if (rda_session_is_x2go())
+		return TRUE;
+
+	/* possibly add more checks for other remote desktop frameworks
+	   that have a session suspension feature */
+
+	return FALSE;
+}
+
+gboolean
+rda_session_suspend(void)
+{
+	if (rda_session_is_x2go())
+		return rda_session_suspend_x2go();
+
+	return FALSE;
+}
+
+gboolean
+rda_session_terminate(void)
+{
+	if (rda_session_is_x2go())
+		return rda_session_terminate_x2go();
+
+	return FALSE;
+}
diff --git a/src/rda.h b/src/rda.h
new file mode 100644
index 0000000..394e969
--- /dev/null
+++ b/src/rda.h
@@ -0,0 +1,62 @@
+/* -*- Mode: C; c-set-style: linux indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+
+/* rda.h - Remote Desktop Awareness
+
+   Copyright (C) 2018 Mike Gabriel
+   All rights reserved.
+
+   The RDA Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The RDA Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the Mate Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+   Boston, MA  02110-1301, USA.
+ */
+
+#ifndef RDA_H
+#define RDA_H
+
+G_BEGIN_DECLS
+
+enum {
+	REMOTE_TECHNOLOGY_UNCHECKED,
+	REMOTE_TECHNOLOGY_NONE,
+	REMOTE_TECHNOLOGY_UNKNOWN,
+	REMOTE_TECHNOLOGY_X2GO,
+};
+
+extern guint
+remote_technology;
+
+void
+rda_init (void);
+
+gboolean
+rda_session_is_local(void);
+
+gboolean
+rda_session_is_remote (void);
+
+guint
+rda_get_remote_technology(void);
+
+gchar *
+rda_get_remote_technology_name (void);
+
+gboolean
+rda_session_can_be_suspended(void);
+
+gboolean
+rda_suspend_session(void);
+
+G_END_DECLS
+
+#endif /* RDA_H */
diff --git a/src/rda.pc.in b/src/rda.pc.in
new file mode 100644
index 0000000..e79b9c3
--- /dev/null
+++ b/src/rda.pc.in
@@ -0,0 +1,12 @@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+bindir=@bindir@
+includedir=@includedir@
+
+Cflags: -I${includedir}/rda
+Libs: -lrda
+
+Name: librda
+Description: Remote Desktop Awareness
+Version: @VERSION@
diff --git a/src/rda_x2go.c b/src/rda_x2go.c
new file mode 100644
index 0000000..34094e3
--- /dev/null
+++ b/src/rda_x2go.c
@@ -0,0 +1,110 @@
+/* -*- Mode: C; c-set-style: linux indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+
+/* rda_x2go.c - Remote Desktop Awareness for X2Go Sessions
+
+   Copyright (C) 2018 Mike Gabriel
+   All rights reserved.
+
+   The RDA Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The RDA Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the Mate Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+ */
+
+#include <config.h>
+#include <glib.h>
+
+#include <rda.h>
+
+gboolean
+rda_session_is_x2go (void)
+{
+	if (remote_technology == REMOTE_TECHNOLOGY_X2GO)
+		return TRUE;
+
+	if (g_getenv("X2GO_SESSION"))
+	{
+		remote_technology = REMOTE_TECHNOLOGY_X2GO;
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+gboolean
+rda_session_suspend_x2go(void)
+{
+	if (!rda_session_is_x2go())
+		return FALSE;
+
+	gint std_in, std_out;
+	GError * error = NULL;
+
+	const gchar * argv[1];
+	argv[0] = "x2gosuspend-session";
+
+	// FIXME: use g_spawn_sync
+	g_spawn_async_with_pipes(NULL, /* pwd */
+	                         (gchar **)argv,
+	                         NULL, /* env */
+	                         G_SPAWN_DO_NOT_REAP_CHILD,
+	                         NULL, NULL, /* child setup */
+	                         NULL,
+	                         &std_in,
+	                         &std_out,
+	                         NULL, /* stderr */
+	                         &error); /* error */
+
+	if (error == NULL)
+	{
+		return TRUE;
+	} else {
+		// FIXME: Maybe put some error reporting to a higher API level
+		//        here...
+		return FALSE;
+	}
+}
+
+gboolean
+rda_session_terminate_x2go(void)
+{
+	if (!rda_session_is_x2go())
+		return FALSE;
+
+	gint std_in, std_out;
+	GError * error = NULL;
+
+	const gchar * argv[1];
+	argv[0] = "x2goterminate-session";
+
+	// FIXME: use g_spawn_sync
+	g_spawn_async_with_pipes(NULL, /* pwd */
+	                         (gchar **)argv,
+	                         NULL, /* env */
+	                         G_SPAWN_DO_NOT_REAP_CHILD,
+	                         NULL, NULL, /* child setup */
+	                         NULL,
+	                         &std_in,
+	                         &std_out,
+	                         NULL, /* stderr */
+	                         &error); /* error */
+
+	if (error == NULL)
+	{
+		return TRUE;
+	} else {
+		// FIXME: Maybe put some error reporting to a higher API level
+		//        here...
+		return FALSE;
+	}
+}
diff --git a/src/rda_x2go.h b/src/rda_x2go.h
new file mode 100644
index 0000000..ceeb9d4
--- /dev/null
+++ b/src/rda_x2go.h
@@ -0,0 +1,41 @@
+/* -*- Mode: C; c-set-style: linux indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+
+/* rda_x2go.c - Remote Desktop Awareness for X2Go Sessions
+
+   Copyright (C) 2018 Mike Gabriel
+   All rights reserved.
+
+   The RDA Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The RDA Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the Mate Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+   Boston, MA 02110-1301, USA.
+ */
+
+#ifndef RDA_X2GO_H
+#define RDA_X2GO_H
+
+#include <config.h>
+#include <glib.h>
+
+#include <rda.h>
+
+gboolean
+rda_session_is_x2go (void);
+
+gboolean
+rda_session_suspend_x2go(void);
+
+gboolean
+rda_session_terminate_x2go(void);
+
+#endif /* RDA_X2GO_H */