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()
102 /* TODO: check whether using SIGHUP isn't better */
105 else if (childpid > 0)
106 killpg(childpid, SIGKILL);
109 /*----------------------------------------------------------
111 | set the process in background
112 +--------------------------------------------------------- */
113 static void daemonize()
118 // open /dev/console to redirect output messAFBes
119 consoleFD = open(config->console, O_WRONLY | O_APPEND | O_CREAT, 0640);
121 ERROR("AFB-daemon cannot open /dev/console (use --foreground)");
124 // fork process when running background mode
127 // if fail nothing much to do
129 ERROR("AFB-daemon Failed to fork son process");
132 // if in father process, just leave
136 // son process get all data in standalone mode
137 NOTICE("background mode [pid:%d console:%s]", getpid(),
140 // redirect default I/O on console
142 dup(consoleFD); // redirect stderr
144 dup(consoleFD); // redirect stdout
145 close(0); // no need for stdin
149 setsid(); // allow father process to fully exit
150 sleep(2); // allow main to leave and release port
154 /*---------------------------------------------------------
156 | Handles the HTTP server
157 +--------------------------------------------------------- */
158 static int init_alias(void *closure, char *spec)
160 struct afb_hsrv *hsrv = closure;
161 char *path = strchr(spec, ':');
164 ERROR("Missing ':' in alias %s. Alias ignored", spec);
168 INFO("Alias for url=%s to path=%s", spec, path);
169 return afb_hsrv_add_alias(hsrv, spec, afb_common_rootdir_get_fd(), path,
173 static int init_http_server(struct afb_hsrv *hsrv)
175 if (!afb_hsrv_add_handler
176 (hsrv, config->rootapi, afb_hswitch_websocket_switch, NULL, 20))
179 if (!afb_hsrv_add_handler
180 (hsrv, config->rootapi, afb_hswitch_apis, NULL, 10))
183 if (run_for_list(config->aliases, init_alias, hsrv))
186 if (config->roothttp != NULL) {
187 if (!afb_hsrv_add_alias
188 (hsrv, "", afb_common_rootdir_get_fd(), config->roothttp,
193 if (!afb_hsrv_add_handler
194 (hsrv, config->rootbase, afb_hswitch_one_page_api_redirect, NULL,
201 static struct afb_hsrv *start_http_server()
204 struct afb_hsrv *hsrv;
206 if (afb_hreq_init_download_path(config->uploaddir)) {
207 ERROR("unable to set the upload directory %s", config->uploaddir);
211 hsrv = afb_hsrv_create();
213 ERROR("memory allocation failure");
217 if (!afb_hsrv_set_cache_timeout(hsrv, config->cacheTimeout)
218 || !init_http_server(hsrv)) {
219 ERROR("initialisation of httpd failed");
224 NOTICE("Waiting port=%d rootdir=%s", config->httpdPort, config->rootdir);
225 NOTICE("Browser URL= http:/*localhost:%d", config->httpdPort);
227 rc = afb_hsrv_start(hsrv, (uint16_t) config->httpdPort, 15);
229 ERROR("starting of httpd failed");
237 /*---------------------------------------------------------
240 +--------------------------------------------------------- */
242 static void on_sigchld(int signum, siginfo_t *info, void *uctx)
244 if (info->si_pid == childpid) {
245 switch (info->si_code) {
251 killpg(info->si_pid, SIGKILL);
252 waitpid(info->si_pid, NULL, 0);
264 #define SUBST_CHAR '@'
265 #define SUBST_STR "@"
267 static char *instanciate_string(char *arg, const char *port, const char *token)
269 char *resu, *it, *wr;
272 /* get the changes */
275 it = strchrnul(arg, SUBST_CHAR);
278 case 'p': chg++; dif += (int)strlen(port) - 2; break;
279 case 't': chg++; dif += (int)strlen(token) - 2; break;
280 case SUBST_CHAR: it++; chg++; dif--; break;
283 it = strchrnul(it, SUBST_CHAR);
286 /* return arg when no change */
290 /* allocates the result */
291 resu = malloc((it - arg) + dif + 1);
293 ERROR("out of memory");
297 /* instanciate the arguments */
300 it = strchrnul(arg, SUBST_CHAR);
301 wr = mempcpy(wr, arg, it - arg);
305 case 'p': wr = stpcpy(wr, port); break;
306 case 't': wr = stpcpy(wr, token); break;
307 default: *wr++ = SUBST_CHAR;
308 case SUBST_CHAR: *wr++ = *it;
317 static int instanciate_environ(const char *port, const char *token)
319 extern char **environ;
323 /* instanciate the environment */
324 for (i = 0 ; environ[i] ; i++) {
325 repl = instanciate_string(environ[i], port, token);
333 static int instanciate_command_args(const char *port, const char *token)
338 /* instanciate the arguments */
339 for (i = 0 ; config->exec[i] ; i++) {
340 repl = instanciate_string(config->exec[i], port, token);
343 config->exec[i] = repl;
348 static int execute_command()
350 struct sigaction siga;
354 /* check whether a command is to execute or not */
355 if (!config->exec || !config->exec[0])
361 /* install signal handler */
362 memset(&siga, 0, sizeof siga);
363 siga.sa_sigaction = on_sigchld;
364 siga.sa_flags = SA_SIGINFO;
365 sigaction(SIGCHLD, &siga, NULL);
372 /* compute the string for port */
373 if (config->httpdPort)
374 rc = snprintf(port, sizeof port, "%d", config->httpdPort);
376 rc = snprintf(port, sizeof port, "%cp", SUBST_CHAR);
377 if (rc < 0 || rc >= (int)(sizeof port)) {
378 ERROR("port->txt failed");
381 /* instanciate arguments and environment */
382 if (instanciate_command_args(port, config->token) >= 0
383 && instanciate_environ(port, config->token) >= 0) {
387 execv(config->exec[0], config->exec);
388 ERROR("can't launch %s: %m", config->exec[0]);
395 /*---------------------------------------------------------
396 | job for starting the daemon
397 +--------------------------------------------------------- */
401 struct afb_hsrv *hsrv;
403 // ------------------ sanity check ----------------------------------------
404 if (config->httpdPort <= 0) {
405 ERROR("no port is defined");
409 mkdir(config->workdir, S_IRWXU | S_IRGRP | S_IXGRP);
410 if (chdir(config->workdir) < 0) {
411 ERROR("Can't enter working dir %s", config->workdir);
415 afb_api_so_set_timeout(config->apiTimeout);
416 start_list(config->dbus_clients, afb_api_dbus_add_client, "the afb-dbus client");
417 start_list(config->ws_clients, afb_api_ws_add_client, "the afb-websocket client");
418 start_list(config->ldpaths, afb_api_so_add_pathset, "the binding path set");
419 start_list(config->so_bindings, afb_api_so_add_binding, "the binding");
421 afb_session_init(config->nbSessionMax, config->cntxTimeout, config->token);
423 start_list(config->dbus_servers, afb_api_dbus_add_server, "the afb-dbus service");
424 start_list(config->ws_servers, afb_api_ws_add_server, "the afb-websocket service");
426 if (!afb_hreq_init_cookie(config->httpdPort, config->rootapi, config->cntxTimeout)) {
427 ERROR("initialisation of cookies failed");
432 if (afb_common_rootdir_set(config->rootdir) < 0) {
433 ERROR("failed to set common root directory");
437 DEBUG("Init config done");
439 /* install trace of requests */
440 if (config->tracereq)
441 afb_hook_req_create(NULL, NULL, NULL, config->tracereq, NULL, NULL);
443 /* start the services */
444 if (afb_apis_start_all_services(1) < 0)
447 /* start the HTTP server */
448 if (!config->noHttpd) {
449 hsrv = start_http_server();
454 /* run the command */
455 if (execute_command() < 0)
459 sd_notify(1, "READY=1");
464 /*---------------------------------------------------------
466 | Parse option and launch action
467 +--------------------------------------------------------- */
469 int main(int argc, char *argv[])
471 // let's run this program with a low priority
474 LOGAUTH("afb-daemon");
478 // ------------- Build session handler & init config -------
479 config = afb_config_parse_arguments(argc, argv);
481 // --------- run -----------
482 if (config->background) {
483 // --------- in background mode -----------
484 INFO("entering background mode");
487 // ---- in foreground mode --------------------
488 INFO("entering foreground mode");
492 // atexit(exit_handler);
494 /* ignore any SIGPIPE */
495 signal(SIGPIPE, SIG_IGN);
497 /* enter job processing */
498 jobs_start(3, 0, 50, start);
499 WARNING("hoops returned from jobs_enter! [report bug]");