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/*
This file is part of GNUnet.
Copyright (C) 2012 GNUnet e.V.
GNUnet 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, or (at your
option) any later version.
GNUnet 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 GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
/**
* @file src/setup/gnunet-setup-hostlist-server.c
* @brief (de)sensitize UI elements related to hostlist server configuration
* based on the build configuration of the hostlist daemon
* @author Christian Grothoff
*/
#include "gnunet-setup.h"
#include <gnunet/gnunet_util_lib.h>
/**
* Timeout for hostlist daemon to print help information
*/
#define CMD_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3)
/**
* Function called to report the result of testing the hostlist daemon.
*
* @param cls closure
* @param result GNUNET_YES if the hostlist daemon has an integrated hostlist
* server, GNUNET_NO otherwise
*/
typedef void (*TestHostlistDaemonCallback) (void *cls,
int result);
/**
* Context for running hostlist daemon and processing its output.
*/
struct CommandContext
{
/**
* Handle to the command.
*/
struct GNUNET_OS_CommandHandle *cmd;
/**
* Where to pass the result.
*/
TestHostlistDaemonCallback callback;
/**
* Closure for the callback.
*/
void *callback_cls;
/**
* GNUNET_YES if the target argument was found, GNUNET_NO otherwise.
*/
int found;
};
static void
set_checkbutton_status (void *cls,
int result)
{
GtkWidget * widget = cls;
GtkToggleButton *button;
if (GNUNET_YES != result)
{
gtk_widget_set_sensitive (widget, FALSE);
button = GTK_TOGGLE_BUTTON (widget);
if (button == NULL)
{
GNUNET_break (0);
return;
}
/* also deactivate the checkbutton since this option could be enabled
by editing the config file manually */
gtk_toggle_button_set_active (button, FALSE);
}
}
static void
set_spinbutton_status (void *cls,
int result)
{
GtkWidget * widget = cls;
if (GNUNET_YES != result)
gtk_widget_set_sensitive (widget, FALSE);
}
/**
* Process the output from the 'gnunet-daemon-hostlist -h' command
* to find out whether the hostlist daemon can provide a hostlist server.
*
* @param cls the 'struct CommandContext'
* @param line line of output, NULL at the end
*/
static void
process_hostlist_daemon_output (void *cls, const char *line)
{
struct CommandContext *ctx = cls;
char *t;
char *w;
if (NULL == line)
{
ctx->callback (ctx->callback_cls, ctx->found);
GNUNET_OS_command_stop (ctx->cmd);
GNUNET_free (ctx);
return;
}
t = GNUNET_strdup (line);
w = strtok (t, " ");
while (w != NULL)
{
if (0 == strcmp (w, "--provide-hostlist"))
{
ctx->found = GNUNET_YES;
break;
}
w = strtok (NULL, " ");
}
GNUNET_free (t);
}
/**
* Run 'gnunet-daemon-hostlist -h'. Output of this command will let us
* know whether the hostlist daemon can provide a hostlist server.
*
* @param callback function to call with the result
* @param cls closure for the callback
*/
static void
test_hostlist_daemon (TestHostlistDaemonCallback callback,
void *cls)
{
struct CommandContext *ctx;
char *binary;
ctx = GNUNET_new (struct CommandContext);
ctx->callback = callback;
ctx->callback_cls = cls;
ctx->found = GNUNET_NO;
binary = GNUNET_OS_get_libexec_binary_path ("gnunet-daemon-hostlist");
ctx->cmd = GNUNET_OS_command_run (&process_hostlist_daemon_output,
ctx,
CMD_TIMEOUT,
binary,
"gnunet-daemon-hostlist",
"-h",
NULL);
GNUNET_free (binary);
if (NULL == ctx->cmd)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("Could not determine whether the hostlist daemon has"
" an integrated hostlist server!\n"));
GNUNET_free (ctx);
}
}
void
GNUNET_setup_hostlist_offer_hostlist_checkbutton_realize_cb (GtkWidget * widget,
gpointer user_data)
{
test_hostlist_daemon (&set_checkbutton_status, widget);
}
void
GNUNET_setup_hostlist_advertise_checkbutton_realize_cb (GtkWidget * widget,
gpointer user_data)
{
test_hostlist_daemon (&set_checkbutton_status, widget);
}
void
GNUNET_setup_hostlist_server_port_spin_button_realize_cb (GtkWidget * widget,
gpointer user_data)
{
test_hostlist_daemon (&set_spinbutton_status, widget);
}
/* end of gnunet-setup-hostlist-server.c */
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