remmina_ext_exec.c 5.26 KB
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/*
 * Remmina - The GTK+ Remote Desktop Client
 * Copyright (C) 2009-2010 Vic Lee
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 * Copyright (C) 2014-2019 Antenore Gatta, Giovanni Panozzo
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 *
 * 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 Street, Fifth Floor,
 * Boston, MA  02110-1301, USA.
 *
 *  In addition, as a special exception, the copyright holders give
 *  permission to link the code of portions of this program with the
 *  OpenSSL library under certain conditions as described in each
 *  individual source file, and distribute linked combinations
 *  including the two.
 *  You must obey the GNU General Public License in all respects
 *  for all of the code used other than OpenSSL. *  If you modify
 *  file(s) with this exception, you may extend this exception to your
 *  version of the file(s), but you are not obligated to do so. *  If you
 *  do not wish to do so, delete this exception statement from your
 *  version. *  If you delete this exception statement from all source
 *  files in the program, then also delete it here.
 *
 */
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#include <gdk/gdkkeysyms.h>
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#include <gtk/gtk.h>
#include <glib/gi18n.h>
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#include <glib.h>
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#include <stdlib.h>
#include <sys/wait.h>
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#include <unistd.h>
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#include "remmina_utils.h"
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#include "remmina_file.h"
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#include "remmina_ext_exec.h"
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#include "remmina_public.h"
#include "remmina/remmina_trace_calls.h"

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#define SPAWN_TIMEOUT 10

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#define GET_OBJECT(object_name) gtk_builder_get_object(builder, object_name)

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static void wait_for_child(GPid pid, gint script_retval, gpointer data)
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{
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	PCon_Spinner *pcspinner = (PCon_Spinner*)data;
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	gtk_spinner_stop(GTK_SPINNER(pcspinner->spinner));
	gtk_widget_destroy(GTK_WIDGET(pcspinner->dialog));
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	g_spawn_close_pid(pid);
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	/* TODO At the moment background processes will fail to start before the
	 * remmina connection.
	 * Adding a delay here could be a (not good) solution, or we should
	 * monitor each child opened, but it could be quit tricky and messy */
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	g_free(pcspinner);
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}

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GtkDialog* remmina_ext_exec_new(RemminaFile* remminafile, const char *remmina_ext_exec_type)
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{
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	TRACE_CALL(__func__);
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	GtkBuilder *builder;
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	PCon_Spinner *pcspinner;
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	GError *error = NULL;
	char **argv;
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	gchar *cmd = NULL;
	GString *cmd_str;
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	gchar pre[11];
	gchar post[12];
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	GPid child_pid;

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	strcpy(pre, "precommand");
	strcpy(post, "postcommand");

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	if (remmina_ext_exec_type != NULL && (
				strcmp(remmina_ext_exec_type, pre) |
				strcmp(remmina_ext_exec_type, post) )) {
		cmd_str = g_string_new(remmina_file_get_string(remminafile, remmina_ext_exec_type));
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		remmina_utils_string_replace_all(cmd_str, "%h", remmina_file_get_string(remminafile, "server"));
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		remmina_utils_string_replace_all(cmd_str, "%t", remmina_file_get_string(remminafile, "ssh_server"));
		remmina_utils_string_replace_all(cmd_str, "%u", remmina_file_get_string(remminafile, "username"));
		remmina_utils_string_replace_all(cmd_str, "%U", remmina_file_get_string(remminafile, "ssh_username"));
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		remmina_utils_string_replace_all(cmd_str, "%p", remmina_file_get_string(remminafile, "name"));
		remmina_utils_string_replace_all(cmd_str, "%g", remmina_file_get_string(remminafile, "group"));
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	}else{
		return FALSE;
	}

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	cmd = g_string_free(cmd_str, FALSE);
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	if (*cmd != 0) {
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		pcspinner = g_new(PCon_Spinner, 1);
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		builder = remmina_public_gtk_builder_new_from_file("remmina_spinner.glade");
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		pcspinner->dialog = GTK_DIALOG(gtk_builder_get_object(builder, "DialogSpinner"));
		pcspinner->label_pleasewait = GTK_LABEL(GET_OBJECT("label_pleasewait"));
		pcspinner->spinner = GTK_WIDGET(GET_OBJECT("spinner"));
		pcspinner->button_cancel = GTK_BUTTON(GET_OBJECT("button_cancel"));
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		/* Connect signals */
		gtk_builder_connect_signals(builder, NULL);

		/* Exec a predefined command */
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		g_shell_parse_argv(cmd, NULL, &argv, &error);
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		if (error) {
			g_warning("%s\n", error->message);
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			g_error_free(error);
		}
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		/* Consider using G_SPAWN_SEARCH_PATH_FROM_ENVP (from glib 2.38)*/
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		g_spawn_async(  NULL,                           // cwd
			argv,                                   // argv
			NULL,                                   // envp
			G_SPAWN_SEARCH_PATH |
			G_SPAWN_SEARCH_PATH_FROM_ENVP |
			G_SPAWN_DO_NOT_REAP_CHILD,              // flags
			NULL,                                   // child_setup
			NULL,                                   // child_setup user data
			&child_pid,                             // pid location
			&error);                                // error
		if (!error) {
			gtk_spinner_start(GTK_SPINNER(pcspinner->spinner));
			g_child_watch_add(child_pid, wait_for_child, (gpointer)pcspinner);
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			gtk_dialog_run(pcspinner->dialog);
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		}else  {
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			g_warning("Command %s exited with error: %s\n", cmd, error->message);
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			g_error_free(error);
		}
		g_strfreev(argv);
		return (pcspinner->dialog);
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	}
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	return FALSE;
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}