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/*
This file is part of GNUnet.
Copyright (C) 2010, 2011, 2012, 2013, 2017 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.c
* @brief Main function of gnunet-setup
* @author Christian Grothoff
*/
#include "gnunet-setup.h"
#include "gnunet-setup-options.h"
#include <gnunet/gnunet_constants.h>
#include <regex.h>
#if ENABLE_NLS
#include <locale.h>
#endif
/**
* Main loop handle.
*/
static struct GNUNET_GTK_MainLoop *ml;
/**
* Name of the configuration file.
*/
const char *option_cfg_name;
/**
* Our configuration.
*/
struct GNUNET_CONFIGURATION_Handle *cfg;
/**
* Global return value (for success/failure of gnunet-setup).
*/
static int gret;
#ifndef MINGW
/**
* Flag to enable privilege escalation.
*/
static int do_gksu;
#endif
/**
* Get an object from the main window.
*
* @param name name of the object
* @return NULL on error, otherwise the object
*/
GObject *
GNUNET_SETUP_get_object (const char *name)
{
if (NULL == ml)
return NULL;
return GNUNET_GTK_main_loop_get_object (ml, name);
}
/**
* User clicked on some widget, update the help button label and link.
*
* @param widget widget that was clicked on (unused)
* @param event the current event
* @param user_data context with the option specification to evaluate
* @return FALSE (continue event handling)
*/
static gboolean
help_click_callback (GtkWidget *widget,
GdkEventButton *event,
gpointer user_data)
{
const struct GNUNET_SETUP_OptionSpecification *os = user_data;
GtkLinkButton *help;
if (GDK_BUTTON_PRESS != event->type)
return FALSE;
help = GTK_LINK_BUTTON (GNUNET_SETUP_get_object ("GNUNET_setup_help_text"));
gtk_link_button_set_uri (help, os->help_url);
gtk_button_set_label (GTK_BUTTON (help), os->help_text);
return FALSE;
}
/**
* The main visible page in our main notebook changed. If the
* GNS page is visible, hide the help text, otherwise show it.
*/
void
GNUNET_setup_notebook_switch_page_cb (GtkNotebook *notebook,
GtkWidget *page,
guint page_num,
gpointer user_data)
{
GtkWidget *help;
GtkWidget *gnu;
help = GTK_WIDGET (GNUNET_SETUP_get_object ("GNUNET_setup_help_text"));
gnu = GTK_WIDGET (GNUNET_SETUP_get_object ("GNUNET_setup_gns_vbox"));
if (gnu == page)
gtk_widget_hide (help);
else
gtk_widget_show (help);
}
/**
* Change the visibility of widgets according to the
* value and visibility specification given.
*
* @param os option specification
* @param value current value for the given option
*/
static void
update_visibility (const struct GNUNET_SETUP_OptionSpecification *os,
const char *value)
{
unsigned int i;
const struct GNUNET_SETUP_VisibilitySpecification *vs;
GtkWidget *widget;
regex_t r;
if (NULL == os->visibility)
return;
i = 0;
while (os->visibility[i].widget_name != NULL)
{
vs = &os->visibility[i];
widget = GTK_WIDGET (GNUNET_SETUP_get_object (vs->widget_name));
if (NULL == widget)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_ ("Widget `%s' not found\n"),
vs->widget_name);
}
if (NULL != vs->show_value)
{
if (0 !=
regcomp (&r, vs->show_value, REG_EXTENDED | REG_ICASE | REG_NOSUB))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_ ("Invalid regular expression `%s'\n"),
vs->show_value);
i++;
continue;
}
if (0 == regexec (&r, value, 0, NULL, 0))
gtk_widget_show (widget);
else
gtk_widget_hide (widget);
regfree (&r);
}
if (NULL != vs->hide_value)
{
if (0 != regcomp (&r, vs->hide_value, REG_ICASE | REG_NOSUB))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_ ("Invalid regular expression `%s'\n"),
vs->show_value);
i++;
continue;
}
if (0 == regexec (&r, value, 0, NULL, 0))
gtk_widget_hide (widget);
else
gtk_widget_show (widget);
regfree (&r);
}
i++;
}
}
/**
* Function called whenever a widget changes its state.
*
* @param os details about the option
*/
static void
widget_state_change_callback (const struct GNUNET_SETUP_OptionSpecification *os)
{
GObject *widget;
char *value;
widget = GNUNET_SETUP_get_object (os->widget_name);
GNUNET_assert (NULL != os->save_function);
if (GNUNET_OK != os->save_function (os->load_save_cls,
os->section,
os->option,
widget,
cfg))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_ ("Failed to obtain option value from widget `%s'\n"),
os->widget_name);
return;
}
if (NULL != os->input_validation_function)
os->input_validation_function (os->input_validation_function_cls, widget);
if ((NULL != os->section) && (NULL != os->option))
{
if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (cfg,
os->section,
os->option,
&value))
{
GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
os->section,
os->option);
value = GNUNET_strdup ("");
}
}
else
return;
update_visibility (os, value);
GNUNET_free (value);
}
/**
* Load options into the main dialog.
*/
static void
load_options ()
{
const struct GNUNET_SETUP_OptionSpecification *os;
GObject *widget;
char *value;
for (unsigned int i = 0; NULL != option_specifications[i].widget_name; i++)
{
os = &option_specifications[i];
widget = GNUNET_SETUP_get_object (os->widget_name);
if (NULL == widget)
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_ ("Widget `%s' not found\n"),
os->widget_name);
continue;
}
if (NULL != os->load_function)
{
if ((NULL == os->section) || (NULL == os->option))
{
if (GNUNET_OK != os->load_function (os->load_save_cls,
NULL,
NULL,
NULL,
widget,
cfg))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_ ("Failed to initialize widget `%s'\n"),
os->widget_name);
}
}
else
{
if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_string (cfg,
os->section,
os->option,
&value))
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_ (
"No default value known for option `%s' in section `%s'\n"),
os->option,
os->section);
}
else
{
if (GNUNET_OK != os->load_function (os->load_save_cls,
os->section,
os->option,
value,
widget,
cfg))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_ (
"Failed to initialize widget `%s' with value `%s'\n"),
os->widget_name,
value);
}
else
{
update_visibility (os, value);
}
GNUNET_free (value);
}
}
}
if (NULL != os->input_validation_function)
os->input_validation_function (os->input_validation_function_cls, widget);
if (os->help_text != NULL)
{
g_signal_connect (widget,
"button-press-event",
G_CALLBACK (&help_click_callback),
(void *) os);
}
if (NULL != os->change_signal)
{
GNUNET_assert (NULL != os->save_function);
g_signal_connect_swapped (widget,
os->change_signal,
G_CALLBACK (&widget_state_change_callback),
(void *) os);
}
}
}
/**
* Write final configuration to disk.
*
* @return #GNUNET_OK on success
*/
static int
write_configuration ()
{
struct GNUNET_CONFIGURATION_Handle *cfgDefault;
int ret;
cfgDefault = GNUNET_CONFIGURATION_create ();
(void) GNUNET_CONFIGURATION_load (cfgDefault, NULL); /* load defaults only */
ret = GNUNET_CONFIGURATION_write_diffs (cfgDefault, cfg, option_cfg_name);
GNUNET_CONFIGURATION_destroy (cfgDefault);
return ret;
}
/**
* Method run on shutdown.
*
* @param cls the main loop handle
*/
static void
cleanup_task (void *cls)
{
if (NULL == ml)
{
GNUNET_break (0);
return;
}
GNUNET_GTK_main_loop_quit (ml);
ml = NULL;
if (GNUNET_OK != write_configuration ())
gret = 1;
cfg = NULL;
}
/**
* Callback invoked if the application is supposed to exit.
*/
void
GNUNET_SETUP_quit_cb (GObject *object, gpointer user_data)
{
GNUNET_SCHEDULER_shutdown ();
}
#ifndef MINGW
/**
* Try elevating user privileges to run as user 'gnunet' or 'root'.
*
* @param username user gnunet-setup should be run as
* @return #GNUNET_OK on success
*/
static int
try_gksu (const char *username)
{
struct GNUNET_OS_Process *proc;
proc = GNUNET_OS_start_process (
GNUNET_OS_INHERIT_STD_ALL,
NULL,
NULL,
NULL,
"gksu",
"-u",
username,
"-m",
_ (
"Enter YOUR password to run gnunet-setup as user 'gnunet' (assuming 'sudo' allows it)"),
"-D",
_ (
"Enter YOUR password to run gnunet-setup as user 'gnunet' (assuming 'sudo' allows it)"),
NULL);
if (NULL == proc)
return GNUNET_SYSERR;
GNUNET_OS_process_wait (proc);
GNUNET_OS_process_destroy (proc);
return GNUNET_OK;
}
#endif
/**
* User clicked on the button to edit the list of friends.
* Launch gnunet-peerinfo-gtk.
*/
void
GNUNET_setup_launch_edit_friends_button_clicked_cb (GtkButton *button,
gpointer *user_data)
{
struct GNUNET_OS_Process *proc;
proc = GNUNET_OS_start_process (GNUNET_OS_INHERIT_STD_ALL,
NULL,
NULL,
NULL,
"gnunet-peerinfo-gtk",
"-c",
option_cfg_name,
NULL);
if (NULL == proc)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
_ ("Failed to launch gnunet-peerinfo-gtk\n"));
return;
}
/* simply yield control, let it run */
GNUNET_free (proc);
}
/**
* Actual main method that sets up the configuration window.
*
* @param cls the main loop handle
*/
static void
run (void *cls)
{
GtkWidget *main_window;
#ifndef MINGW
uid_t my_uid;
struct passwd *gnunet_pw;
my_uid = getuid ();
gnunet_pw = getpwnam ("gnunet");
if ((0 != do_gksu) && (0 != my_uid) && (NULL != gnunet_pw) &&
(my_uid != gnunet_pw->pw_uid) && (GNUNET_OK == try_gksu ("gnunet")))
{
GNUNET_GTK_main_loop_quit (cls);
return;
}
#endif
ml = cls;
if (GNUNET_OK != GNUNET_GTK_main_loop_build_window (ml, NULL))
return;
option_cfg_name = GNUNET_GTK_main_loop_get_configuration_file (ml);
cfg = GNUNET_CONFIGURATION_create ();
if (GNUNET_YES == GNUNET_DISK_file_test (option_cfg_name))
(void) GNUNET_CONFIGURATION_load (cfg, option_cfg_name);
else
(void) GNUNET_CONFIGURATION_load (cfg, NULL);
if (0 != access (option_cfg_name, W_OK))
{
if (ENOENT == errno)
{
char *dirname;
size_t len;
(void) GNUNET_DISK_directory_create_for_file (option_cfg_name);
dirname = GNUNET_STRINGS_filename_expand (option_cfg_name);
len = strlen (dirname) - 1;
while ((len > 0) && (dirname[len] != DIR_SEPARATOR))
len--;
dirname[len] = '\0';
if (0 != access (dirname, X_OK | W_OK | R_OK))
{
if (ENOENT == errno)
errno = EACCES; /* really means somewhere access was denied */
}
else
errno = ENOENT; /* all good now */
}
if (ENOENT != errno)
{
fprintf (
stderr,
"Refusing to start as I will be unable to write configuration file `%s': %s\n",
option_cfg_name,
strerror (errno));
GNUNET_GTK_main_loop_quit (ml);
return;
}
}
main_window = GTK_WIDGET (GNUNET_SETUP_get_object ("GNUNET_setup_dialog"));
load_options ();
GNUNET_SCHEDULER_add_shutdown (&cleanup_task, NULL);
gtk_widget_show (main_window);
gtk_window_present (GTK_WINDOW (main_window));
}
/**
* Main function for gnunet-setup.
*
* @param argc number of arguments
* @param argv arguments
* @return 0 on success
*/
int
main (int argc, char *const *argv)
{
struct GNUNET_GETOPT_CommandLineOption options[] = {
#ifndef MINGW
GNUNET_GETOPT_option_flag (
'e',
"elevate-privileges",
gettext_noop (
"run as user 'gnunet', if necessary by executing gksu to elevate rights"),
&do_gksu),
#endif
GNUNET_GETOPT_OPTION_END
};
int ret;
if (GNUNET_OK == GNUNET_GTK_main_loop_start ("gnunet-setup",
"gnunet-setup",
argc,
argv,
options,
"gnunet_setup_main_window.glade",
&run))
ret = gret;
else
ret = 1;
return ret;
}
/* end of gnunet-setup.c */
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