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- /*
- This file is part of GNUnet.
- (C) 2009, 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 arm/gnunet-arm.c
- * @brief arm for writing a tool
- * @author Christian Grothoff
- */
- #include "platform.h"
- #include "gnunet_arm_service.h"
- #include "gnunet_constants.h"
- #include "gnunet_util_lib.h"
- /**
- * Timeout for stopping services. Long to give some services a real chance.
- */
- #define STOP_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 1)
- /**
- * Timeout for stopping ARM. Extra-long since ARM needs to stop everyone else.
- */
- #define STOP_TIMEOUT_ARM GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 2)
- /**
- * Timeout for starting services, very short because of the strange way start works
- * (by checking if running before starting, so really this time is always waited on
- * startup (annoying)).
- */
- #define START_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)
- /**
- * Timeout for listing all running services.
- */
- #define LIST_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 2)
- /**
- * Set if we are to shutdown all services (including ARM).
- */
- static int end;
- /**
- * Set if we are to start default services (including ARM).
- */
- static int start;
- /**
- * Set if we are to stop/start default services (including ARM).
- */
- static int restart;
- /**
- * Set if we should delete configuration and temp directory on exit.
- */
- static int delete;
- /**
- * Set if we should not print status messages.
- */
- static int quiet;
- /**
- * Monitor ARM activity.
- */
- static int monitor;
- /**
- * Set if we should print a list of currently running services.
- */
- static int list;
- /**
- * Set to the name of a service to start.
- */
- static char *init;
- /**
- * Set to the name of a service to kill.
- */
- static char *term;
- /**
- * Set to the name of the config file used.
- */
- static const char *config_file;
- /**
- * Set to the directory where runtime files are stored.
- */
- static char *dir;
- /**
- * Final status code.
- */
- static int ret;
- /**
- * Connection with ARM.
- */
- static struct GNUNET_ARM_Handle *h;
- /**
- * Monitor connection with ARM.
- */
- static struct GNUNET_ARM_MonitorHandle *m;
- /**
- * Our configuration.
- */
- static struct GNUNET_CONFIGURATION_Handle *cfg;
- /**
- * Processing stage that we are in. Simple counter.
- */
- static unsigned int phase;
- /**
- * User defined timestamp for completing operations.
- */
- static struct GNUNET_TIME_Relative timeout;
- /**
- * Do we want to give our stdout to gnunet-service-arm?
- */
- static unsigned int no_stdout;
- /**
- * Do we want to give our stderr to gnunet-service-arm?
- */
- static unsigned int no_stderr;
- /**
- * Attempts to delete configuration file and GNUNET_HOME
- * on ARM shutdown provided the end and delete options
- * were specified when gnunet-arm was run.
- */
- static void
- delete_files ()
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Will attempt to remove configuration file %s and service directory %s\n",
- config_file, dir);
- if (0 != UNLINK (config_file))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to remove configuration file %s\n"),
- config_file);
- }
- if (GNUNET_OK != GNUNET_DISK_directory_remove (dir))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to remove servicehome directory %s\n"),
- dir);
- }
- }
- /**
- * Main continuation-passing-style loop. Runs the various
- * jobs that we've been asked to do in order.
- *
- * @param cls closure, unused
- * @param tc context, unused
- */
- static void
- shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
- {
- if (NULL != h)
- {
- GNUNET_ARM_disconnect_and_free (h);
- h = NULL;
- }
- if (NULL != m)
- {
- GNUNET_ARM_monitor_disconnect_and_free (m);
- m = NULL;
- }
- if ((GNUNET_YES == end) && (GNUNET_YES == delete))
- delete_files ();
- GNUNET_CONFIGURATION_destroy (cfg);
- cfg = NULL;
- }
- /**
- * Returns a string interpretation of 'rs'
- *
- * @param rs the request status from ARM
- * @return a string interpretation of the request status
- */
- static const char *
- req_string (enum GNUNET_ARM_RequestStatus rs)
- {
- switch (rs)
- {
- case GNUNET_ARM_REQUEST_SENT_OK:
- return _("Message was sent successfully");
- case GNUNET_ARM_REQUEST_CONFIGURATION_ERROR:
- return _("Misconfiguration (can not connect to the ARM service)");
- case GNUNET_ARM_REQUEST_DISCONNECTED:
- return _("We disconnected from ARM before we could send a request");
- case GNUNET_ARM_REQUEST_BUSY:
- return _("ARM API is busy");
- case GNUNET_ARM_REQUEST_TOO_LONG:
- return _("Request does not fit into a message");
- case GNUNET_ARM_REQUEST_TIMEOUT:
- return _("Request timed out");
- }
- return _("Unknown request status");
- }
- /**
- * Returns a string interpretation of the 'result'
- *
- * @param result the arm result
- * @return a string interpretation
- */
- static const char *
- ret_string (enum GNUNET_ARM_Result result)
- {
- switch (result)
- {
- case GNUNET_ARM_RESULT_STOPPED:
- return _("%s is stopped");
- case GNUNET_ARM_RESULT_STARTING:
- return _("%s is starting");
- case GNUNET_ARM_RESULT_STOPPING:
- return _("%s is stopping");
- case GNUNET_ARM_RESULT_IS_STARTING_ALREADY:
- return _("%s is starting already");
- case GNUNET_ARM_RESULT_IS_STOPPING_ALREADY:
- return _("%s is stopping already");
- case GNUNET_ARM_RESULT_IS_STARTED_ALREADY:
- return _("%s is started already");
- case GNUNET_ARM_RESULT_IS_STOPPED_ALREADY:
- return _("%s is stopped already");
- case GNUNET_ARM_RESULT_IS_NOT_KNOWN:
- return _("%s service is not known to ARM");
- case GNUNET_ARM_RESULT_START_FAILED:
- return _("%s service failed to start");
- case GNUNET_ARM_RESULT_IN_SHUTDOWN:
- return _("%s service cannot be started because ARM is shutting down");
- }
- return _("%.s Unknown result code.");
- }
- /**
- * Main task that runs our various operations in order.
- *
- * @param cls closure
- * @param tc scheudler context
- */
- static void
- action_loop (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
- /**
- * Function called whenever we connect to or disconnect from ARM.
- * Termiantes the process if we fail to connect to the service on
- * our first attempt.
- *
- * @param cls closure
- * @param connected GNUNET_YES if connected, GNUNET_NO if disconnected,
- * GNUNET_SYSERR on error.
- */
- static void
- conn_status (void *cls,
- int connected)
- {
- static int once;
- if ( (GNUNET_SYSERR == connected) &&
- (0 == once) )
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("Fatal error initializing ARM API.\n"));
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- once = 1;
- }
- /**
- * We have requested ARM to be started, this function
- * is called with the result of the operation. Informs the
- * use of the result; on success, we continue with the event
- * loop, on failure we terminate the process.
- *
- * @param cls closure unused
- * @param rs what happened to our request
- * @param service name of the service we tried to start ("arm")
- * @param result if the request was processed, this is the result
- * according to ARM
- */
- static void
- start_callback (void *cls,
- enum GNUNET_ARM_RequestStatus rs, const char *service,
- enum GNUNET_ARM_Result result)
- {
- char *msg;
- if (GNUNET_ARM_REQUEST_SENT_OK != rs)
- {
- GNUNET_asprintf (&msg, "%s", _("Failed to start the ARM service: %s\n"));
- FPRINTF (stdout, msg, req_string (rs));
- GNUNET_free (msg);
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- if ( (GNUNET_ARM_RESULT_STARTING != result) &&
- (GNUNET_ARM_RESULT_IS_STARTED_ALREADY != result) )
- {
- GNUNET_asprintf (&msg, "%s", _("Failed to start the ARM service: %s\n"));
- FPRINTF (stdout, msg, ret_string (result));
- GNUNET_free (msg);
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ARM service [re]start successful\n");
- start = 0;
- GNUNET_SCHEDULER_add_now (action_loop, NULL);
- }
- /**
- * We have requested ARM to be stopped, this function
- * is called with the result of the operation. Informs the
- * use of the result; on success, we continue with the event
- * loop, on failure we terminate the process.
- *
- * @param cls closure unused
- * @param rs what happened to our request
- * @param service name of the service we tried to start ("arm")
- * @param result if the request was processed, this is the result
- * according to ARM
- */
- static void
- stop_callback (void *cls,
- enum GNUNET_ARM_RequestStatus rs, const char *service,
- enum GNUNET_ARM_Result result)
- {
- char *msg;
- if (GNUNET_ARM_REQUEST_SENT_OK != rs)
- {
- GNUNET_asprintf (&msg, "%s",
- _("Failed to send a stop request to the ARM service: %s\n"));
- FPRINTF (stdout, msg, req_string (rs));
- GNUNET_free (msg);
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- if ((GNUNET_ARM_RESULT_STOPPING != result) &&
- (GNUNET_ARM_RESULT_STOPPED != result) &&
- (GNUNET_ARM_RESULT_IS_STOPPED_ALREADY != result))
- {
- GNUNET_asprintf (&msg, "%s", _("Failed to stop the ARM service: %s\n"));
- FPRINTF (stdout, msg, ret_string (result));
- GNUNET_free (msg);
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "ARM service shutdown successful\n");
- end = 0;
- if (restart)
- {
- restart = 0;
- start = 1;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Initiating an ARM restart\n");
- }
- GNUNET_SCHEDULER_add_now (&action_loop, NULL);
- }
- /**
- * We have requested a service to be started, this function
- * is called with the result of the operation. Informs the
- * use of the result; on success, we continue with the event
- * loop, on failure we terminate the process.
- *
- * @param cls closure unused
- * @param rs what happened to our request
- * @param service name of the service we tried to start
- * @param result if the request was processed, this is the result
- * according to ARM
- */
- static void
- init_callback (void *cls,
- enum GNUNET_ARM_RequestStatus rs, const char *service,
- enum GNUNET_ARM_Result result)
- {
- char *msg;
- if (GNUNET_ARM_REQUEST_SENT_OK != rs)
- {
- GNUNET_asprintf (&msg,
- _("Failed to send a request to start the `%s' service: %%s\n"),
- init);
- FPRINTF (stdout, msg, req_string (rs));
- GNUNET_free (msg);
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- if ((GNUNET_ARM_RESULT_STARTING != result) &&
- (GNUNET_ARM_RESULT_IS_STARTED_ALREADY != result))
- {
- GNUNET_asprintf (&msg, _("Failed to start the `%s' service: %s\n"),
- init, ret_string (result));
- FPRINTF (stdout, msg, service);
- GNUNET_free (msg);
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Service %s [re]started successfully\n",
- init);
- GNUNET_free (init);
- init = NULL;
- GNUNET_SCHEDULER_add_now (&action_loop, NULL);
- }
- /**
- * We have requested a service to be stopped, this function
- * is called with the result of the operation. Informs the
- * use of the result; on success, we continue with the event
- * loop, on failure we terminate the process.
- *
- * @param cls closure unused
- * @param rs what happened to our request
- * @param service name of the service we tried to start
- * @param result if the request was processed, this is the result
- * according to ARM
- */
- static void
- term_callback (void *cls,
- enum GNUNET_ARM_RequestStatus rs, const char *service,
- enum GNUNET_ARM_Result result)
- {
- char *msg;
- if (GNUNET_ARM_REQUEST_SENT_OK != rs)
- {
- GNUNET_asprintf (&msg,
- _("Failed to send a request to kill the `%s' service: %%s\n"),
- term);
- FPRINTF (stdout, msg, req_string (rs));
- GNUNET_free (msg);
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- if ((GNUNET_ARM_RESULT_STOPPED != result) &&
- (GNUNET_ARM_RESULT_IS_STOPPED_ALREADY != result))
- {
- GNUNET_asprintf (&msg,
- _("Failed to kill the `%s' service: %s\n"),
- term, ret_string (result));
- FPRINTF (stdout, msg, service);
- GNUNET_free (msg);
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Service %s stopped successfully\n",
- term);
- GNUNET_free (term);
- term = NULL;
- GNUNET_SCHEDULER_add_now (&action_loop, NULL);
- }
- /**
- * Function called with the list of running services. Prints
- * the list to stdout, then starts the event loop again.
- * Prints an error message and terminates the process on errors.
- *
- * @param cls closure (unused)
- * @param rs request status (success, failure, etc.)
- * @param count number of services in the list
- * @param list list of services that are running
- */
- static void
- list_callback (void *cls,
- enum GNUNET_ARM_RequestStatus rs, unsigned int count,
- const char *const*list)
- {
- unsigned int i;
- if (GNUNET_ARM_REQUEST_SENT_OK != rs)
- {
- char *msg;
- GNUNET_asprintf (&msg, "%s", _("Failed to request a list of services: %s\n"));
- FPRINTF (stdout, msg, req_string (rs));
- GNUNET_free (msg);
- ret = 3;
- GNUNET_SCHEDULER_shutdown ();
- }
- if (NULL == list)
- {
- FPRINTF (stderr, "%s", _("Error communicating with ARM. ARM not running?\n"));
- GNUNET_SCHEDULER_shutdown ();
- ret = 3;
- return;
- }
- FPRINTF (stdout, "%s", _("Running services:\n"));
- for (i = 0; i < count; i++)
- FPRINTF (stdout, "%s\n", list[i]);
- GNUNET_SCHEDULER_add_now (&action_loop, NULL);
- }
- /**
- * Main action loop. Runs the various jobs that we've been asked to
- * do, in order.
- *
- * @param cls closure, unused
- * @param tc context, unused
- */
- static void
- action_loop (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
- {
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Running requested actions\n");
- while (1)
- {
- switch (phase++)
- {
- case 0:
- if (NULL != term)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Termination action\n");
- GNUNET_ARM_request_service_stop (h, term,
- (0 == timeout.rel_value_us) ? STOP_TIMEOUT : timeout,
- &term_callback, NULL);
- return;
- }
- break;
- case 1:
- if (end || restart)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "End action\n");
- GNUNET_ARM_request_service_stop (h, "arm",
- (0 == timeout.rel_value_us) ? STOP_TIMEOUT_ARM : timeout,
- &stop_callback, NULL);
- return;
- }
- break;
- case 2:
- if (start)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Start action\n");
- GNUNET_ARM_request_service_start (h, "arm",
- (no_stdout ? 0 : GNUNET_OS_INHERIT_STD_OUT) |
- (no_stderr ? 0 : GNUNET_OS_INHERIT_STD_ERR),
- (0 == timeout.rel_value_us) ? START_TIMEOUT: timeout,
- start_callback, NULL);
- return;
- }
- break;
- case 3:
- if (NULL != init)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Initialization action\n");
- GNUNET_ARM_request_service_start (h, init, GNUNET_OS_INHERIT_STD_NONE,
- (0 == timeout.rel_value_us) ? STOP_TIMEOUT : timeout,
- &init_callback, NULL);
- return;
- }
- break;
- case 4:
- if (list)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Going to list all running services controlled by ARM.\n");
- GNUNET_ARM_request_service_list (h,
- (0 == timeout.rel_value_us) ? LIST_TIMEOUT : timeout,
- &list_callback, &list);
- return;
- }
- break;
- case 5:
- if (monitor)
- {
- if (! quiet)
- fprintf (stderr,
- _("Now only monitoring, press CTRL-C to stop.\n"));
- quiet = 0; /* does not make sense to stay quiet in monitor mode at this time */
- return; /* done with tasks, just monitor */
- }
- break;
- default: /* last phase */
- GNUNET_SCHEDULER_shutdown ();
- return;
- }
- }
- }
- /**
- * Function called when a service starts or stops.
- *
- * @param cls closure
- * @param service service name
- * @param status status of the service
- */
- static void
- srv_status (void *cls,
- const char *service, enum GNUNET_ARM_ServiceStatus status)
- {
- const char *msg;
- switch (status)
- {
- case GNUNET_ARM_SERVICE_MONITORING_STARTED:
- return; /* this should be done silently */
- case GNUNET_ARM_SERVICE_STOPPED:
- msg = _("Stopped %s.\n");
- break;
- case GNUNET_ARM_SERVICE_STARTING:
- msg = _("Starting %s...\n");
- break;
- case GNUNET_ARM_SERVICE_STOPPING:
- msg = _("Stopping %s...\n");
- break;
- default:
- msg = NULL;
- break;
- }
- if (! quiet)
- {
- if (NULL != msg)
- FPRINTF (stderr, msg, service);
- else
- FPRINTF (stderr, _("Unknown status %u for service %s.\n"), status, service);
- }
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got service %s status %d\n", service, (int) status);
- }
- /**
- * Main function that will be run by the scheduler.
- *
- * @param cls closure
- * @param args remaining command-line arguments
- * @param cfgfile name of the configuration file used (for saving, can be NULL!)
- * @param c configuration
- */
- static void
- run (void *cls,
- char *const *args,
- const char *cfgfile,
- const struct GNUNET_CONFIGURATION_Handle *c)
- {
- char *armconfig;
- cfg = GNUNET_CONFIGURATION_dup (c);
- config_file = cfgfile;
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_string (cfg, "PATHS", "GNUNET_HOME", &dir))
- {
- GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
- "PATHS", "GNUNET_HOME");
- return;
- }
- if (NULL != cfgfile)
- {
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_filename (cfg, "arm", "CONFIG",
- &armconfig))
- {
- GNUNET_CONFIGURATION_set_value_string (cfg, "arm", "CONFIG",
- cfgfile);
- }
- else
- GNUNET_free (armconfig);
- }
- if (NULL == (h = GNUNET_ARM_connect (cfg, &conn_status, NULL)))
- return;
- if (monitor)
- m = GNUNET_ARM_monitor (cfg, &srv_status, NULL);
- GNUNET_SCHEDULER_add_now (&action_loop, NULL);
- GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
- &shutdown_task, NULL);
- }
- /**
- * The main function to obtain arm from gnunetd.
- *
- * @param argc number of arguments from the command line
- * @param argv command line arguments
- * @return 0 ok, 1 on error
- */
- int
- main (int argc, char *const *argv)
- {
- static const struct GNUNET_GETOPT_CommandLineOption options[] = {
- {'e', "end", NULL, gettext_noop ("stop all GNUnet services"),
- GNUNET_NO, &GNUNET_GETOPT_set_one, &end},
- {'i', "init", "SERVICE", gettext_noop ("start a particular service"),
- GNUNET_YES, &GNUNET_GETOPT_set_string, &init},
- {'k', "kill", "SERVICE", gettext_noop ("stop a particular service"),
- GNUNET_YES, &GNUNET_GETOPT_set_string, &term},
- {'s', "start", NULL, gettext_noop ("start all GNUnet default services"),
- GNUNET_NO, &GNUNET_GETOPT_set_one, &start},
- {'r', "restart", NULL,
- gettext_noop ("stop and start all GNUnet default services"),
- GNUNET_NO, &GNUNET_GETOPT_set_one, &restart},
- {'d', "delete", NULL,
- gettext_noop ("delete config file and directory on exit"),
- GNUNET_NO, &GNUNET_GETOPT_set_one, &delete},
- {'m', "monitor", NULL,
- gettext_noop ("monitor ARM activities"),
- GNUNET_NO, &GNUNET_GETOPT_set_one, &monitor},
- {'q', "quiet", NULL, gettext_noop ("don't print status messages"),
- GNUNET_NO, &GNUNET_GETOPT_set_one, &quiet},
- {'T', "timeout", "MSECS",
- gettext_noop ("timeout in MSECS milliseconds for completing current operation"),
- GNUNET_YES, &GNUNET_GETOPT_set_relative_time, &timeout},
- {'I', "info", NULL, gettext_noop ("list currently running services"),
- GNUNET_NO, &GNUNET_GETOPT_set_one, &list},
- {'O', "no-stdout", NULL, gettext_noop ("don't let gnunet-service-arm inherit standard output"),
- GNUNET_NO, &GNUNET_GETOPT_set_one, &no_stdout},
- {'E', "no-stderr", NULL, gettext_noop ("don't let gnunet-service-arm inherit standard error"),
- GNUNET_NO, &GNUNET_GETOPT_set_one, &no_stderr},
- GNUNET_GETOPT_OPTION_END
- };
- if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
- return 2;
- if (GNUNET_OK ==
- GNUNET_PROGRAM_run (argc, argv, "gnunet-arm",
- gettext_noop
- ("Control services and the Automated Restart Manager (ARM)"),
- options, &run, NULL))
- {
- GNUNET_free ((void *) argv);
- return ret;
- }
- GNUNET_free ((void*) argv);
- return 1;
- }
- /* end of gnunet-arm.c */
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