2 * Copyright (C) 2015, 2016, 2017 "IoT.bzh"
3 * Author "Fulup Ar Foll"
4 * Author José Bollo <jose.bollo@iot.bzh>
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
20 #define NO_BINDING_VERBOSE_MACRO
30 #include <systemd/sd-event.h>
31 #include <systemd/sd-daemon.h>
33 #include <afb/afb-binding.h>
35 #include "afb-config.h"
36 #include "afb-hswitch.h"
38 #include "afb-api-so.h"
39 #include "afb-api-dbus.h"
40 #include "afb-api-ws.h"
42 #include "afb-context.h"
45 #include "afb-session.h"
47 #include "afb-common.h"
52 if SELF_PGROUP == 0 the launched command is the group leader
53 if SELF_PGROUP != 0 afb-daemon is the group leader
57 static struct afb_config *config;
58 static pid_t childpid;
60 /*----------------------------------------------------------
61 | helpers for handling list of arguments
62 +--------------------------------------------------------- */
65 * Calls the callback 'run' for each value of the 'list'
66 * until the callback returns 0 or the end of the list is reached.
67 * Returns either NULL if the end of the list is reached or a pointer
68 * to the item whose value made 'run' return 0.
69 * 'closure' is used for passing user data.
71 static struct afb_config_list *run_for_list(struct afb_config_list *list,
72 int (*run) (void *closure, char *value),
75 while (list && run(closure, list->value))
80 static int run_start(void *closure, char *value)
82 int (*starter) (const char *value) = closure;
83 return starter(value) >= 0;
86 static void start_list(struct afb_config_list *list,
87 int (*starter) (const char *value), const char *message)
89 list = run_for_list(list, run_start, starter);
91 ERROR("can't start %s %s", message, list->value);
96 /*----------------------------------------------------------
98 | Handles on exit specific actions
99 +--------------------------------------------------------- */
100 static void exit_handler()
104 else if (childpid > 0)
105 killpg(childpid, SIGHUP);
108 /*----------------------------------------------------------
110 | set the process in background
111 +--------------------------------------------------------- */
112 static void daemonize()
117 // open /dev/console to redirect output messAFBes
118 consoleFD = open(config->console, O_WRONLY | O_APPEND | O_CREAT, 0640);
120 ERROR("AFB-daemon cannot open /dev/console (use --foreground)");
123 // fork process when running background mode
126 // if fail nothing much to do
128 ERROR("AFB-daemon Failed to fork son process");
131 // if in father process, just leave
135 // son process get all data in standalone mode
136 NOTICE("background mode [pid:%d console:%s]", getpid(),
139 // redirect default I/O on console
141 dup(consoleFD); // redirect stderr
143 dup(consoleFD); // redirect stdout
144 close(0); // no need for stdin
148 setsid(); // allow father process to fully exit
149 sleep(2); // allow main to leave and release port
153 /*---------------------------------------------------------
155 | Handles the HTTP server
156 +--------------------------------------------------------- */
157 static int init_alias(void *closure, char *spec)
159 struct afb_hsrv *hsrv = closure;
160 char *path = strchr(spec, ':');
163 ERROR("Missing ':' in alias %s. Alias ignored", spec);
167 INFO("Alias for url=%s to path=%s", spec, path);
168 return afb_hsrv_add_alias(hsrv, spec, afb_common_rootdir_get_fd(), path,
172 static int init_http_server(struct afb_hsrv *hsrv)
174 if (!afb_hsrv_add_handler
175 (hsrv, config->rootapi, afb_hswitch_websocket_switch, NULL, 20))
178 if (!afb_hsrv_add_handler
179 (hsrv, config->rootapi, afb_hswitch_apis, NULL, 10))
182 if (run_for_list(config->aliases, init_alias, hsrv))
185 if (config->roothttp != NULL) {
186 if (!afb_hsrv_add_alias
187 (hsrv, "", afb_common_rootdir_get_fd(), config->roothttp,
192 if (!afb_hsrv_add_handler
193 (hsrv, config->rootbase, afb_hswitch_one_page_api_redirect, NULL,
200 static struct afb_hsrv *start_http_server()
203 struct afb_hsrv *hsrv;
205 if (afb_hreq_init_download_path(config->uploaddir)) {
206 ERROR("unable to set the upload directory %s", config->uploaddir);
210 hsrv = afb_hsrv_create();
212 ERROR("memory allocation failure");
216 if (!afb_hsrv_set_cache_timeout(hsrv, config->cacheTimeout)
217 || !init_http_server(hsrv)) {
218 ERROR("initialisation of httpd failed");
223 NOTICE("Waiting port=%d rootdir=%s", config->httpdPort, config->rootdir);
224 NOTICE("Browser URL= http:/*localhost:%d", config->httpdPort);
226 rc = afb_hsrv_start(hsrv, (uint16_t) config->httpdPort, 15);
228 ERROR("starting of httpd failed");
236 /*---------------------------------------------------------
239 +--------------------------------------------------------- */
241 static void on_sigchld(int signum, siginfo_t *info, void *uctx)
243 if (info->si_pid == childpid) {
244 switch (info->si_code) {
250 killpg(info->si_pid, SIGKILL);
251 waitpid(info->si_pid, NULL, 0);
263 #define SUBST_CHAR '@'
264 #define SUBST_STR "@"
266 static char *instanciate_string(char *arg, const char *port, const char *token)
268 char *resu, *it, *wr;
271 /* get the changes */
274 it = strchrnul(arg, SUBST_CHAR);
277 case 'p': chg++; dif += (int)strlen(port) - 2; break;
278 case 't': chg++; dif += (int)strlen(token) - 2; break;
279 case SUBST_CHAR: it++; chg++; dif--; break;
282 it = strchrnul(it, SUBST_CHAR);
285 /* return arg when no change */
289 /* allocates the result */
290 resu = malloc((it - arg) + dif + 1);
292 ERROR("out of memory");
296 /* instanciate the arguments */
299 it = strchrnul(arg, SUBST_CHAR);
300 wr = mempcpy(wr, arg, it - arg);
304 case 'p': wr = stpcpy(wr, port); break;
305 case 't': wr = stpcpy(wr, token); break;
306 default: *wr++ = SUBST_CHAR;
307 case SUBST_CHAR: *wr++ = *it;
316 static int instanciate_environ(const char *port, const char *token)
318 extern char **environ;
322 /* instanciate the environment */
323 for (i = 0 ; environ[i] ; i++) {
324 repl = instanciate_string(environ[i], port, token);
332 static int instanciate_command_args(const char *port, const char *token)
337 /* instanciate the arguments */
338 for (i = 0 ; config->exec[i] ; i++) {
339 repl = instanciate_string(config->exec[i], port, token);
342 config->exec[i] = repl;
347 static int execute_command()
349 struct sigaction siga;
353 /* check whether a command is to execute or not */
354 if (!config->exec || !config->exec[0])
360 /* install signal handler */
361 memset(&siga, 0, sizeof siga);
362 siga.sa_sigaction = on_sigchld;
363 siga.sa_flags = SA_SIGINFO;
364 sigaction(SIGCHLD, &siga, NULL);
371 /* compute the string for port */
372 if (config->httpdPort)
373 rc = snprintf(port, sizeof port, "%d", config->httpdPort);
375 rc = snprintf(port, sizeof port, "%cp", SUBST_CHAR);
376 if (rc < 0 || rc >= (int)(sizeof port)) {
377 ERROR("port->txt failed");
380 /* instanciate arguments and environment */
381 if (instanciate_command_args(port, config->token) >= 0
382 && instanciate_environ(port, config->token) >= 0) {
386 execv(config->exec[0], config->exec);
387 ERROR("can't launch %s: %m", config->exec[0]);
394 /*---------------------------------------------------------
395 | job for starting the daemon
396 +--------------------------------------------------------- */
400 struct afb_hsrv *hsrv;
402 // ------------------ sanity check ----------------------------------------
403 if (config->httpdPort <= 0) {
404 ERROR("no port is defined");
408 mkdir(config->workdir, S_IRWXU | S_IRGRP | S_IXGRP);
409 if (chdir(config->workdir) < 0) {
410 ERROR("Can't enter working dir %s", config->workdir);
414 afb_apis_set_timeout(config->apiTimeout);
415 start_list(config->dbus_clients, afb_api_dbus_add_client, "the afb-dbus client");
416 start_list(config->ws_clients, afb_api_ws_add_client, "the afb-websocket client");
417 start_list(config->ldpaths, afb_api_so_add_pathset, "the binding path set");
418 start_list(config->so_bindings, afb_api_so_add_binding, "the binding");
420 afb_session_init(config->nbSessionMax, config->cntxTimeout, config->token);
422 start_list(config->dbus_servers, afb_api_dbus_add_server, "the afb-dbus service");
423 start_list(config->ws_servers, afb_api_ws_add_server, "the afb-websocket service");
425 if (!afb_hreq_init_cookie(config->httpdPort, config->rootapi, config->cntxTimeout)) {
426 ERROR("initialisation of cookies failed");
431 if (afb_common_rootdir_set(config->rootdir) < 0) {
432 ERROR("failed to set common root directory");
436 DEBUG("Init config done");
438 /* install trace of requests */
439 if (config->tracereq)
440 afb_hook_req_create(NULL, NULL, NULL, config->tracereq, NULL, NULL);
442 /* start the services */
443 if (afb_apis_start_all_services(1) < 0)
446 /* start the HTTP server */
447 if (!config->noHttpd) {
448 hsrv = start_http_server();
453 /* run the command */
454 if (execute_command() < 0)
458 sd_notify(1, "READY=1");
463 /*---------------------------------------------------------
465 | Parse option and launch action
466 +--------------------------------------------------------- */
468 int main(int argc, char *argv[])
470 // let's run this program with a low priority
473 LOGAUTH("afb-daemon");
477 // ------------- Build session handler & init config -------
478 config = afb_config_parse_arguments(argc, argv);
480 // --------- run -----------
481 if (config->background) {
482 // --------- in background mode -----------
483 INFO("entering background mode");
486 // ---- in foreground mode --------------------
487 INFO("entering foreground mode");
491 atexit(exit_handler);
493 /* ignore any SIGPIPE */
494 signal(SIGPIPE, SIG_IGN);
496 /* enter job processing */
497 jobs_start(3, 0, 50, start);
498 WARNING("hoops returned from jobs_enter! [report bug]");