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|
/*
This file is part of GNUnet.
(C) 2010, 2011, 2012, 2013 Christian Grothoff (and other contributing authors)
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., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @file src/setup/gnunet-setup.c
* @brief Main function of gnunet-setup
* @author Christian Grothoff
*/
#include "gnunet-setup.h"
#include "gnunet-setup-transport.h"
#include "gnunet-setup-options.h"
#include "gnunet-setup-gns.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.
*/
static const char *cfgName;
/**
* Our configuration.
*/
struct GNUNET_CONFIGURATION_Handle *cfg;
/**
* Global return value (for success/failure of gnunet-setup).
*/
static int gret;
/**
* Resolver process handle.
*/
static struct GNUNET_OS_Process *resolver;
/**
* Namestore process handle.
*/
static struct GNUNET_OS_Process *namestore;
/**
* Identity process handle.
*/
static struct GNUNET_OS_Process *identity;
/**
* Run autoconfig-only and then exit immediately.
*/
static int do_autoconfig;
#ifndef MINGW
/**
* Flag to enable privilege escalation.
*/
static int do_gksu;
/**
* Show all configuration options, even if we are run
* as a normal user and a 'gnunet' user exists and thus
* most options should not apply to the normal user.
*/
static int force_full_setup;
#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 ((os->section != NULL) && (os->option != NULL))
GNUNET_assert (GNUNET_OK ==
GNUNET_CONFIGURATION_get_value_string (cfg, os->section,
os->option, &value));
else
return;
update_visibility (os, value);
GNUNET_free_non_null (value);
}
/**
* Load options into the main dialog.
*/
static void
load_options ()
{
const struct GNUNET_SETUP_OptionSpecification *os;
unsigned int i;
GObject *widget;
char *value;
#ifndef LINUX
gtk_widget_hide (GTK_WIDGET (GNUNET_SETUP_get_object ("GNUNET_setup_gns_hijack_checkbutton")));
#endif
i = 0;
while (NULL != option_specifications[i].widget_name)
{
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);
i++;
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);
}
i++;
}
}
/**
* 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, cfgName);
GNUNET_CONFIGURATION_destroy (cfgDefault);
return ret;
}
/**
* Actual main method that sets up the configuration window.
*
* @param cls the main loop handle
* @param tc scheduler context
*/
static void
cleanup_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
if (NULL == ml)
{
GNUNET_break (0);
return;
}
GNUNET_SETUP_gns_done ();
GNUNET_GTK_main_loop_quit (ml);
ml = NULL;
if (GNUNET_OK != write_configuration ())
gret = 1;
cfg = NULL;
if (NULL != resolver)
{
GNUNET_break (0 == GNUNET_OS_process_kill (resolver, SIGTERM));
GNUNET_OS_process_destroy (resolver);
resolver = NULL;
}
if (NULL != namestore)
{
GNUNET_break (0 == GNUNET_OS_process_kill (namestore, SIGTERM));
GNUNET_OS_process_destroy (namestore);
namestore = NULL;
}
if (NULL != identity)
{
GNUNET_break (0 == GNUNET_OS_process_kill (identity, SIGTERM));
GNUNET_OS_process_destroy (identity);
identity = NULL;
}
}
/**
* Write configuration to dis, (re)start the namestore process and
* reload the namestore models.
*
*
* @param cls closure (unused)
* @param tc scheduler context (unused)
*/
void
GNUNET_SETUP_restart_namestore (void *cls,
const struct GNUNET_SCHEDULER_TaskContext *tc)
{
if (GNUNET_OK != write_configuration ())
return; /* no point in re-starting namestore ... */
GNUNET_SETUP_gns_done ();
if (NULL != namestore)
{
GNUNET_break (0 == GNUNET_OS_process_kill (namestore, SIGTERM));
GNUNET_break (GNUNET_OK == GNUNET_OS_process_wait (namestore));
GNUNET_OS_process_destroy (namestore);
namestore = NULL;
}
namestore =
GNUNET_OS_start_process (GNUNET_YES, GNUNET_OS_INHERIT_STD_ALL,
NULL, NULL,
"gnunet-service-namestore",
"gnunet-service-namestore", NULL);
GNUNET_SETUP_gns_init ();
}
/**
* Callback invoked if the application is supposed to exit.
*/
void
GNUNET_SETUP_quit_cb (GObject * object, gpointer user_data)
{
GNUNET_SCHEDULER_shutdown ();
}
/**
* If the test failed, start the resolver process.
*
* @param cls closure, NULL
* @param result GNUNET_YES if the service is running
*/
static void
start_resolver (void *cls,
int result)
{
char *binary;
if (GNUNET_YES == result)
return;
binary = GNUNET_OS_get_libexec_binary_path ("gnunet-service-resolver");
resolver =
GNUNET_OS_start_process (GNUNET_YES, GNUNET_OS_INHERIT_STD_ALL,
NULL,NULL,
binary,
"gnunet-service-resolver", NULL);
GNUNET_free (binary);
}
/**
* If the test failed, start the identity process.
*
* @param cls closure, NULL
* @param result #GNUNET_YES if the service is running
*/
static void
start_identity (void *cls,
int result)
{
char *binary;
if (GNUNET_YES == result)
return;
binary = GNUNET_OS_get_libexec_binary_path ("gnunet-service-identity");
identity =
GNUNET_OS_start_process (GNUNET_YES, GNUNET_OS_INHERIT_STD_ALL,
NULL, NULL,
binary,
"gnunet-service-identity", NULL);
GNUNET_free (binary);
}
/**
* If the test failed, start the namestore process.
*
* @param cls closure, NULL
* @param result GNUNET_YES if the service is running
*/
static void
start_namestore (void *cls,
int result)
{
char *binary;
if (GNUNET_YES == result)
return;
binary = GNUNET_OS_get_libexec_binary_path ("gnunet-service-namestore");
namestore =
GNUNET_OS_start_process (GNUNET_YES, GNUNET_OS_INHERIT_STD_ALL,
NULL, NULL,
binary,
"gnunet-service-namestore", NULL);
GNUNET_free (binary);
}
#ifndef MINGW
/**
* Try elevating user priviledges 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_NO,
GNUNET_OS_INHERIT_STD_ALL,
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
/**
* Called once the autoconfiguration is done. Triggers shutdown.
*
* @param cls unused
*/
static void
autoconfig_finished_cb (void *cls)
{
GNUNET_SCHEDULER_shutdown ();
}
/**
* Actual main method that sets up the configuration window.
*
* @param cls the main loop handle
* @param tc scheduler context
*/
static void
run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
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;
cfgName = GNUNET_GTK_main_loop_get_configuration_file (ml);
cfg = GNUNET_CONFIGURATION_create ();
#ifndef MINGW
if ( (0 != my_uid) &&
(NULL != gnunet_pw) &&
(my_uid != gnunet_pw->pw_uid) &&
(0 == force_full_setup) )
{
/* load system defaults, system/'gnunet' user's configuration and THEN
our configuration file */
if (GNUNET_YES ==
GNUNET_DISK_file_test ("/etc/gnunet.conf"))
(void) GNUNET_CONFIGURATION_load (cfg, "/etc/gnunet.conf");
else
{
#if HAVE_GETPWNAM
struct passwd *pw;
pw = getpwnam ("gnunet");
if (NULL != pw)
{
char *cfgname;
GNUNET_asprintf (&cfgname,
"%s%s%s",
pw->pw_dir,
DIR_SEPARATOR_STR,
".gnunet/gnunet.conf");
(void) GNUNET_CONFIGURATION_load (cfg, cfgname);
GNUNET_free (cfgname);
}
#endif
}
(void) GNUNET_CONFIGURATION_parse (cfg, cfgName);
}
else
#endif
{
/* only load system defaults and our configuration file */
(void) GNUNET_CONFIGURATION_load (cfg, cfgName);
}
main_window = GTK_WIDGET (GNUNET_SETUP_get_object ("GNUNET_setup_dialog"));
GNUNET_CLIENT_service_test ("resolver",
cfg,
GNUNET_CONSTANTS_SERVICE_TIMEOUT,
&start_resolver, NULL);
GNUNET_CLIENT_service_test ("namestore",
cfg,
GNUNET_CONSTANTS_SERVICE_TIMEOUT,
&start_namestore, NULL);
GNUNET_CLIENT_service_test ("identity",
cfg,
GNUNET_CONSTANTS_SERVICE_TIMEOUT,
&start_identity, NULL);
load_options ();
GNUNET_SETUP_gns_init ();
#ifndef MINGW
if ( (0 != my_uid) &&
(NULL != gnunet_pw) &&
(my_uid != gnunet_pw->pw_uid) &&
(0 == force_full_setup) )
{
/* hide all options that are not for individual users; this
run is only for per-user options, not for per-peer options */
gtk_widget_hide (GTK_WIDGET (GNUNET_SETUP_get_object ("GNUNET_setup_general_vbox")));
gtk_widget_hide (GTK_WIDGET (GNUNET_SETUP_get_object ("GNUNET_setup_transport_main_frame")));
gtk_widget_hide (GTK_WIDGET (GNUNET_SETUP_get_object ("GNUNET_setup_network_tab_vbox")));
gtk_widget_hide (GTK_WIDGET (GNUNET_SETUP_get_object ("GNUNET_setup_fs_main_vbox")));
gtk_widget_hide (GTK_WIDGET (GNUNET_SETUP_get_object ("GNUNET_setup_vpn_vbox")));
gtk_widget_hide (GTK_WIDGET (GNUNET_SETUP_get_object ("GNUNET_setup_exit_vbox")));
gtk_widget_hide (GTK_WIDGET (GNUNET_SETUP_get_object ("GNUNET_setup_namestore_vbox")));
}
#endif
GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
&cleanup_task, NULL);
if (do_autoconfig)
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Attempting fully-automatic, non-interactive network configuration\n"));
GNUNET_setup_transport_autoconfig_start (&autoconfig_finished_cb, NULL);
return;
}
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[] = {
{ 'a', "autoconfig", NULL,
gettext_noop ("attempt automatic configuration of the network and instantly exit"),
0, &GNUNET_GETOPT_set_one, &do_autoconfig },
#ifndef MINGW
{ 'e', "elevate-priviledges", NULL,
gettext_noop ("run as user 'gnunet', if necessary by executing gksu to elevate rights"),
0, &GNUNET_GETOPT_set_one, &do_gksu },
{ 'f', "force-full-setup", NULL,
gettext_noop ("force showing the full set of options, even if gnunet-setup is run as a normal user and as a user 'gnunet' exists on the system, most options should not apply to the normal user as GNUnet should be run by the 'gnunet' user"),
0, &GNUNET_GETOPT_set_one, &force_full_setup },
#endif
GNUNET_GETOPT_OPTION_END
};
int ret;
if (GNUNET_OK ==
GNUNET_GTK_main_loop_start ("gnunet-setup", "gnunet-setup", argc, argv,
options, "gnunet_setup_gtk_main_window.glade",
&run))
ret = gret;
else
ret = 1;
return ret;
}
/* end of gnunet-setup.c */
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