src/main-afb-daemon.c

   1 /*
   2  * Copyright (C) 2015-2019 "IoT.bzh"
   3  * Author "Fulup Ar Foll"
   4  * Author José Bollo <jose.bollo@iot.bzh>
   5  *
   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
   9  *
  10  *   http://www.apache.org/licenses/LICENSE-2.0
  11  *
  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.
  17  */
  18
  19 #define _GNU_SOURCE
  20
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <stdint.h>
  24 #include <signal.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <limits.h>
  28 #include <errno.h>
  29 #include <fcntl.h>
  30 #include <sys/stat.h>
  31 #include <sys/wait.h>
  32
  33 #if !defined(NO_CALL_PERSONALITY)
  34 #include <sys/personality.h>
  35 #endif
  36
  37 #include <json-c/json.h>
  38
  39 #include <systemd/sd-daemon.h>
  40
  41 #include "afb-args.h"
  42 #include "afb-hswitch.h"
  43 #include "afb-apiset.h"
  44 #include "afb-autoset.h"
  45 #include "afb-api-so.h"
  46 #if WITH_DBUS_TRANSPARENCY
  47 #   include "afb-api-dbus.h"
  48 #endif
  49 #include "afb-api-ws.h"
  50 #include "afb-hsrv.h"
  51 #include "afb-hreq.h"
  52 #include "afb-xreq.h"
  53 #include "afb-session.h"
  54 #include "verbose.h"
  55 #include "afb-common.h"
  56 #include "afb-export.h"
  57 #include "afb-monitor.h"
  58 #if WITH_AFB_HOOK
  59 #include "afb-hook.h"
  60 #include "afb-hook-flags.h"
  61 #endif
  62 #include "afb-debug.h"
  63 #if WITH_SUPERVISION
  64 #   include "afb-supervision.h"
  65 #endif
  66
  67 #include "process-name.h"
  68 #include "wrap-json.h"
  69 #include "jobs.h"
  70 #include "sig-monitor.h"
  71 #include "watchdog.h"
  72
  73 #if !defined(DEFAULT_BINDER_INTERFACE)
  74 #  define DEFAULT_BINDER_INTERFACE NULL
  75 #endif
  76
  77 /*
  78    if SELF_PGROUP == 0 the launched command is the group leader
  79    if SELF_PGROUP != 0 afb-daemon is the group leader
  80 */
  81 #define SELF_PGROUP 0
  82
  83 struct afb_apiset *main_apiset;
  84 struct json_object *main_config;
  85
  86 static pid_t childpid;
  87
  88 /**
  89  * Tiny helper around putenv: add the variable name=value
  90  *
  91  * @param name name of the variable to set
  92  * @param value value to set to the variable
  93  *
  94  * @return 0 in case of success or -1 in case of error (with errno set to ENOMEM)
  95  */
  96 static int addenv(const char *name, const char *value)
  97 {
  98         char *head, *middle;
  99
 100         head = malloc(2 + strlen(name) + strlen(value));
 101         if (head == NULL) {
 102                 errno = ENOMEM;
 103                 return -1;
 104         }
 105         middle = stpcpy(head, name);
 106         middle[0] = '=';
 107         strcpy(&middle[1], value);
 108         return putenv(head);
 109 }
 110
 111 /**
 112  * Tiny helper around addenv that export the real path
 113  *
 114  * @param name name of the variable to set
 115  * @param path the path value to export to the variable
 116  *
 117  * @return 0 in case of success or -1 in case of error (with errno set to ENOMEM)
 118  */
 119 static int addenv_realpath(const char *name, const char *path)
 120 {
 121         char buffer[PATH_MAX];
 122         char *p = realpath(path, buffer);
 123         return p ? addenv(name, p) : -1;
 124 }
 125
 126 /**
 127  * Tiny helper around addenv that export an integer
 128  *
 129  * @param name name of the variable to set
 130  * @param value the integer value to export
 131  *
 132  * @return 0 in case of success or -1 in case of error (with errno set to ENOMEM)
 133  */
 134 static int addenv_int(const char *name, int value)
 135 {
 136         char buffer[64];
 137         snprintf(buffer, sizeof buffer, "%d", value);
 138         return addenv(name, buffer);
 139 }
 140
 141 /*----------------------------------------------------------
 142  |   helpers for handling list of arguments
 143  +--------------------------------------------------------- */
 144
 145 static const char *run_for_config_array_opt(const char *name,
 146                                             int (*run) (void *closure, const char *value),
 147                                             void *closure)
 148 {
 149         int i, n, rc;
 150         struct json_object *array, *value;
 151
 152         if (json_object_object_get_ex(main_config, name, &array)) {
 153                 if (!json_object_is_type(array, json_type_array))
 154                         return json_object_get_string(array);
 155                 n = (int)json_object_array_length(array);
 156                 for (i = 0 ; i < n ; i++) {
 157                         value = json_object_array_get_idx(array, i);
 158                         rc = run(closure, json_object_get_string(value));
 159                         if (!rc)
 160                                 return json_object_get_string(value);
 161                 }
 162         }
 163         return NULL;
 164 }
 165
 166 static int run_start(void *closure, const char *value)
 167 {
 168         int (*starter) (const char *value, struct afb_apiset *declare_set, struct afb_apiset *call_set) = closure;
 169         return starter(value, main_apiset, main_apiset) >= 0;
 170 }
 171
 172 static void apiset_start_list(const char *name,
 173                         int (*starter) (const char *value, struct afb_apiset *declare_set, struct afb_apiset *call_set),
 174                         const char *message)
 175 {
 176         const char *item = run_for_config_array_opt(name, run_start, starter);
 177         if (item) {
 178                 ERROR("can't start %s %s", message, item);
 179                 exit(1);
 180         }
 181 }
 182
 183 /*----------------------------------------------------------
 184  | exit_handler
 185  |   Handles on exit specific actions
 186  +--------------------------------------------------------- */
 187 static void exit_handler()
 188 {
 189         struct sigaction siga;
 190
 191         memset(&siga, 0, sizeof siga);
 192         siga.sa_handler = SIG_IGN;
 193         sigaction(SIGTERM, &siga, NULL);
 194
 195         if (SELF_PGROUP)
 196                 killpg(0, SIGTERM);
 197         else if (childpid > 0)
 198                 killpg(childpid, SIGTERM);
 199 }
 200
 201 static void on_sigterm(int signum, siginfo_t *info, void *uctx)
 202 {
 203         NOTICE("Received SIGTERM");
 204         exit(0);
 205 }
 206
 207 static void on_sighup(int signum, siginfo_t *info, void *uctx)
 208 {
 209         NOTICE("Received SIGHUP");
 210         /* TODO */
 211 }
 212
 213 static void setup_daemon()
 214 {
 215         struct sigaction siga;
 216
 217         /* install signal handlers */
 218         memset(&siga, 0, sizeof siga);
 219         siga.sa_flags = SA_SIGINFO;
 220
 221         siga.sa_sigaction = on_sigterm;
 222         sigaction(SIGTERM, &siga, NULL);
 223
 224         siga.sa_sigaction = on_sighup;
 225         sigaction(SIGHUP, &siga, NULL);
 226
 227         /* handle groups */
 228         atexit(exit_handler);
 229
 230         /* ignore any SIGPIPE */
 231         signal(SIGPIPE, SIG_IGN);
 232 }
 233
 234 /*----------------------------------------------------------
 235  | daemonize
 236  |   set the process in background
 237  +--------------------------------------------------------- */
 238 static void daemonize()
 239 {
 240         int fd = 0, daemon, nostdin;
 241         const char *output;
 242         pid_t pid;
 243
 244         daemon = 0;
 245         output = NULL;
 246         wrap_json_unpack(main_config, "{s?b s?s}", "daemon", &daemon, "output", &output);
 247         nostdin = 0;
 248
 249         if (output) {
 250                 fd = open(output, O_WRONLY | O_APPEND | O_CREAT, 0640);
 251                 if (fd < 0) {
 252                         ERROR("Can't open output %s", output);
 253                         exit(1);
 254                 }
 255         }
 256
 257         if (daemon) {
 258                 INFO("entering background mode");
 259
 260                 pid = fork();
 261                 if (pid == -1) {
 262                         ERROR("Failed to fork daemon process");
 263                         exit(1);
 264                 }
 265                 if (pid != 0)
 266                         _exit(0);
 267
 268                 nostdin = 1;
 269         }
 270
 271         /* closes the input */
 272         if (output) {
 273                 NOTICE("Redirecting output to %s", output);
 274                 close(2);
 275                 dup(fd);
 276                 close(1);
 277                 dup(fd);
 278                 close(fd);
 279         }
 280
 281         if (nostdin)
 282                 close(0); /* except if 'daemon', ctrl+C still works after that */
 283 }
 284
 285 /*---------------------------------------------------------
 286  | http server
 287  |   Handles the HTTP server
 288  +--------------------------------------------------------- */
 289 static int init_alias(void *closure, const char *spec)
 290 {
 291         struct afb_hsrv *hsrv = closure;
 292         char *path = strchr(spec, ':');
 293
 294         if (path == NULL) {
 295                 ERROR("Missing ':' in alias %s. Alias ignored", spec);
 296                 return 1;
 297         }
 298         *path++ = 0;
 299         INFO("Alias for url=%s to path=%s", spec, path);
 300         return afb_hsrv_add_alias(hsrv, spec, afb_common_rootdir_get_fd(), path,
 301                                   0, 1);
 302 }
 303
 304 static int init_http_server(struct afb_hsrv *hsrv)
 305 {
 306         int rc;
 307         const char *rootapi, *roothttp, *rootbase;
 308
 309         roothttp = NULL;
 310         rc = wrap_json_unpack(main_config, "{ss ss s?s}",
 311                                 "rootapi", &rootapi,
 312                                 "rootbase", &rootbase,
 313                                 "roothttp", &roothttp);
 314         if (rc < 0) {
 315                 ERROR("Can't get HTTP server config");
 316                 exit(1);
 317         }
 318
 319         if (!afb_hsrv_add_handler(hsrv, rootapi,
 320                         afb_hswitch_websocket_switch, main_apiset, 20))
 321                 return 0;
 322
 323         if (!afb_hsrv_add_handler(hsrv, rootapi,
 324                         afb_hswitch_apis, main_apiset, 10))
 325                 return 0;
 326
 327         if (run_for_config_array_opt("alias", init_alias, hsrv))
 328                 return 0;
 329
 330         if (roothttp != NULL) {
 331                 if (!afb_hsrv_add_alias(hsrv, "",
 332                         afb_common_rootdir_get_fd(), roothttp, -10, 1))
 333                         return 0;
 334         }
 335
 336         if (!afb_hsrv_add_handler(hsrv, rootbase,
 337                         afb_hswitch_one_page_api_redirect, NULL, -20))
 338                 return 0;
 339
 340         return 1;
 341 }
 342
 343 static int add_interface(void *closure, const char *value)
 344 {
 345         struct afb_hsrv *hsrv = closure;
 346         int rc;
 347
 348         rc = afb_hsrv_add_interface(hsrv, value);
 349         return rc > 0;
 350 }
 351
 352 static struct afb_hsrv *start_http_server()
 353 {
 354         int rc;
 355         const char *uploaddir, *rootdir, *errs;
 356         struct afb_hsrv *hsrv;
 357         int cache_timeout, http_port;
 358         struct json_object *junk;
 359
 360         http_port = -1;
 361         rc = wrap_json_unpack(main_config, "{ss ss si s?i}",
 362                                 "uploaddir", &uploaddir,
 363                                 "rootdir", &rootdir,
 364                                 "cache-eol", &cache_timeout,
 365                                 "port", &http_port);
 366         if (rc < 0) {
 367                 ERROR("Can't get HTTP server start config");
 368                 exit(1);
 369         }
 370
 371         if (afb_hreq_init_download_path(uploaddir)) {
 372                 static const char fallback_uploaddir[] = "/tmp";
 373                 WARNING("unable to set the upload directory %s", uploaddir);
 374                 if (afb_hreq_init_download_path(fallback_uploaddir)) {
 375                         ERROR("unable to fallback to upload directory %s", fallback_uploaddir);
 376                         return NULL;
 377                 }
 378                 uploaddir = fallback_uploaddir;
 379         }
 380
 381         hsrv = afb_hsrv_create();
 382         if (hsrv == NULL) {
 383                 ERROR("memory allocation failure");
 384                 return NULL;
 385         }
 386
 387         if (!afb_hsrv_set_cache_timeout(hsrv, cache_timeout)
 388             || !init_http_server(hsrv)) {
 389                 ERROR("initialisation of httpd failed");
 390                 afb_hsrv_put(hsrv);
 391                 return NULL;
 392         }
 393
 394         rc = afb_hsrv_start(hsrv, 15);
 395         if (!rc) {
 396                 ERROR("starting of httpd failed");
 397                 afb_hsrv_put(hsrv);
 398                 return NULL;
 399         }
 400
 401         NOTICE("Serving rootdir=%s uploaddir=%s", rootdir, uploaddir);
 402
 403         /* check if port is set */
 404         if (http_port < 0) {
 405                 /* not set, check existing interfaces */
 406                 if (!json_object_object_get_ex(main_config, "interface", &junk)) {
 407                         ERROR("No port and no interface ");
 408                 }
 409         } else {
 410                 rc = afb_hsrv_add_interface_tcp(hsrv, DEFAULT_BINDER_INTERFACE, (uint16_t) http_port);
 411                 if (!rc) {
 412                         ERROR("setting interface failed");
 413                         afb_hsrv_put(hsrv);
 414                         return NULL;
 415                 }
 416                 NOTICE("Browser URL= http://localhost:%d", http_port);
 417         }
 418
 419         errs = run_for_config_array_opt("interface", add_interface, hsrv);
 420         if (errs) {
 421                 ERROR("setting interface %s failed", errs);
 422                 afb_hsrv_put(hsrv);
 423                 return NULL;
 424         }
 425
 426         return hsrv;
 427 }
 428
 429 /*---------------------------------------------------------
 430  | execute_command
 431  +--------------------------------------------------------- */
 432
 433 static void exit_at_end()
 434 {
 435         exit(0);
 436 }
 437
 438 static void wait_child(int signum, void* arg)
 439 {
 440         pid_t pid = (pid_t)(intptr_t)arg;
 441         pid_t pidchld = childpid;
 442
 443         if (pidchld == pid) {
 444                 childpid = 0;
 445                 if (!SELF_PGROUP)
 446                         killpg(pidchld, SIGKILL);
 447                 waitpid(pidchld, NULL, 0);
 448                 jobs_exit(exit_at_end);
 449         } else {
 450                 waitpid(pid, NULL, 0);
 451         }
 452 }
 453
 454 static void on_sigchld(int signum, siginfo_t *info, void *uctx)
 455 {
 456         if (info->si_pid == childpid) {
 457                 switch (info->si_code) {
 458                 case CLD_EXITED:
 459                 case CLD_KILLED:
 460                 case CLD_DUMPED:
 461                         jobs_queue_lazy(0, 0, wait_child, (void*)(intptr_t)info->si_pid);
 462                 default:
 463                         break;
 464                 }
 465         }
 466 }
 467
 468 /*
 469 # @@ @
 470 # @p port
 471 # @t token
 472 */
 473
 474 #define SUBST_CHAR  '@'
 475 #define SUBST_STR   "@"
 476
 477 static char *instanciate_string(char *arg, const char *port, const char *token)
 478 {
 479         char *resu, *it, *wr, c;
 480         int chg, dif;
 481
 482         /* get the changes */
 483         chg = 0;
 484         dif = 0;
 485         it = strchrnul(arg, SUBST_CHAR);
 486         while (*it) {
 487                 c = *++it;
 488                 if (c == 'p' && port) {
 489                         chg++;
 490                         dif += (int)strlen(port) - 2;
 491                 } else if (c == 't' && token) {
 492                         chg++;
 493                         dif += (int)strlen(token) - 2;
 494                 } else if (c == SUBST_CHAR) {
 495                         it++;
 496                         chg++;
 497                         dif--;
 498                 }
 499                 it = strchrnul(it, SUBST_CHAR);
 500         }
 501
 502         /* return arg when no change */
 503         if (!chg)
 504                 return arg;
 505
 506         /* allocates the result */
 507         resu = malloc((it - arg) + dif + 1);
 508         if (!resu) {
 509                 ERROR("out of memory");
 510                 return NULL;
 511         }
 512
 513         /* instanciate the arguments */
 514         wr = resu;
 515         for (;;) {
 516                 it = strchrnul(arg, SUBST_CHAR);
 517                 wr = mempcpy(wr, arg, it - arg);
 518                 if (!*it)
 519                         break;
 520                 c = *++it;
 521                 if (c == 'p' && port)
 522                         wr = stpcpy(wr, port);
 523                 else if (c == 't' && token)
 524                         wr = stpcpy(wr, token);
 525                 else {
 526                         if (c != SUBST_CHAR)
 527                                 *wr++ = SUBST_CHAR;
 528                         *wr++ = *it;
 529                 }
 530                 arg = ++it;
 531         }
 532
 533         *wr = 0;
 534         return resu;
 535 }
 536
 537 static int instanciate_environ(const char *port, const char *token)
 538 {
 539         extern char **environ;
 540         char *repl;
 541         int i;
 542
 543         /* instantiate the environment */
 544         for (i = 0 ; environ[i] ; i++) {
 545                 repl = instanciate_string(environ[i], port, token);
 546                 if (!repl)
 547                         return -1;
 548                 environ[i] = repl;
 549         }
 550         return 0;
 551 }
 552
 553 static char **instanciate_command_args(struct json_object *exec, const char *port, const char *token)
 554 {
 555         char **result;
 556         char *repl, *item;
 557         int i, n;
 558
 559         /* allocates the result */
 560         n = (int)json_object_array_length(exec);
 561         result = malloc((n + 1) * sizeof * result);
 562         if (!result) {
 563                 ERROR("out of memory");
 564                 return NULL;
 565         }
 566
 567         /* instanciate the arguments */
 568         for (i = 0 ; i < n ; i++) {
 569                 item = (char*)json_object_get_string(json_object_array_get_idx(exec, i));
 570                 repl = instanciate_string(item, port, token);
 571                 if (!repl) {
 572                         free(result);
 573                         return NULL;
 574                 }
 575                 result[i] = repl;
 576         }
 577         result[i] = NULL;
 578         return result;
 579 }
 580
 581 static int execute_command()
 582 {
 583         struct json_object *exec, *oport, *otok;
 584         struct sigaction siga;
 585         const char *token, *port;
 586         char **args;
 587
 588         /* check whether a command is to execute or not */
 589         if (!json_object_object_get_ex(main_config, "exec", &exec))
 590                 return 0;
 591
 592         if (SELF_PGROUP)
 593                 setpgid(0, 0);
 594
 595         /* install signal handler */
 596         memset(&siga, 0, sizeof siga);
 597         siga.sa_sigaction = on_sigchld;
 598         siga.sa_flags = SA_SIGINFO;
 599         sigaction(SIGCHLD, &siga, NULL);
 600
 601         /* fork now */
 602         childpid = fork();
 603         if (childpid)
 604                 return 0;
 605
 606         /* compute the string for port */
 607         if (json_object_object_get_ex(main_config, "port", &oport))
 608                 port = json_object_get_string(oport);
 609         else
 610                 port = 0;
 611         /* instantiate arguments and environment */
 612         if (json_object_object_get_ex(main_config, "token", &otok))
 613                 token = json_object_get_string(otok);
 614         else
 615                 token = 0;
 616         args = instanciate_command_args(exec, port, token);
 617         if (args && instanciate_environ(port, token) >= 0) {
 618                 /* run */
 619                 if (!SELF_PGROUP)
 620                         setpgid(0, 0);
 621                 execv(args[0], args);
 622                 ERROR("can't launch %s: %m", args[0]);
 623         }
 624         exit(1);
 625         return -1;
 626 }
 627
 628 /*---------------------------------------------------------
 629  | startup calls
 630  +--------------------------------------------------------- */
 631
 632 struct startup_req
 633 {
 634         struct afb_xreq xreq;
 635         char *api;
 636         char *verb;
 637         struct json_object *calls;
 638         int index;
 639         int count;
 640         const char *callspec;
 641         struct afb_session *session;
 642 };
 643
 644 static void startup_call_reply(struct afb_xreq *xreq, struct json_object *object, const char *error, const char *info)
 645 {
 646         struct startup_req *sreq = CONTAINER_OF_XREQ(struct startup_req, xreq);
 647
 648         info = info ?: "";
 649         if (!error) {
 650                 NOTICE("startup call %s returned %s (%s)", sreq->callspec, json_object_get_string(object), info);
 651                 json_object_put(object);
 652         } else {
 653                 ERROR("startup call %s ERROR! %s (%s)", sreq->callspec, error, info);
 654                 exit(1);
 655         }
 656 }
 657
 658 static void startup_call_current(struct startup_req *sreq);
 659
 660 static void startup_call_unref(struct afb_xreq *xreq)
 661 {
 662         struct startup_req *sreq = CONTAINER_OF_XREQ(struct startup_req, xreq);
 663
 664         free(sreq->api);
 665         free(sreq->verb);
 666         json_object_put(sreq->xreq.json);
 667         if (++sreq->index < sreq->count)
 668                 startup_call_current(sreq);
 669         else {
 670                 afb_session_close(sreq->session);
 671                 afb_session_unref(sreq->session);
 672                 free(sreq);
 673         }
 674 }
 675
 676 static struct afb_xreq_query_itf startup_xreq_itf =
 677 {
 678         .reply = startup_call_reply,
 679         .unref = startup_call_unref
 680 };
 681
 682 static void startup_call_current(struct startup_req *sreq)
 683 {
 684         const char *api, *verb, *json;
 685         enum json_tokener_error jerr;
 686
 687         sreq->callspec = json_object_get_string(json_object_array_get_idx(sreq->calls, sreq->index)),
 688         api = sreq->callspec;
 689         verb = strchr(api, '/');
 690         if (verb) {
 691                 json = strchr(verb, ':');
 692                 if (json) {
 693                         afb_xreq_init(&sreq->xreq, &startup_xreq_itf);
 694                         afb_context_init_validated(&sreq->xreq.context, sreq->session, NULL, NULL);
 695                         sreq->api = strndup(api, verb - api);
 696                         sreq->verb = strndup(verb + 1, json - verb - 1);
 697                         sreq->xreq.request.called_api = sreq->api;
 698                         sreq->xreq.request.called_verb = sreq->verb;
 699                         sreq->xreq.json = json_tokener_parse_verbose(json + 1, &jerr);
 700                         if (sreq->api && sreq->verb && jerr == json_tokener_success) {
 701                                 afb_xreq_process(&sreq->xreq, main_apiset);
 702                                 return;
 703                         }
 704                 }
 705         }
 706         ERROR("Bad call specification %s", sreq->callspec);
 707         exit(1);
 708 }
 709
 710 static void run_startup_calls()
 711 {
 712         struct json_object *calls;
 713         struct startup_req *sreq;
 714         int count;
 715
 716         if (json_object_object_get_ex(main_config, "call", &calls)
 717          && json_object_is_type(calls, json_type_array)
 718          && (count = (int)json_object_array_length(calls))) {
 719                 sreq = calloc(1, sizeof *sreq);
 720                 sreq->session = afb_session_create(3600);
 721                 sreq->calls = calls;
 722                 sreq->index = 0;
 723                 sreq->count = count;
 724                 startup_call_current(sreq);
 725         }
 726 }
 727
 728 /*---------------------------------------------------------
 729  | job for starting the daemon
 730  +--------------------------------------------------------- */
 731
 732 static void start(int signum, void *arg)
 733 {
 734 #if WITH_AFB_HOOK
 735         const char *tracereq = NULL, *traceapi = NULL, *traceevt = NULL,
 736 #if !defined(REMOVE_LEGACY_TRACE)
 737                 *tracesvc = NULL, *traceditf = NULL,
 738 #endif
 739                 *traceses = NULL, *traceglob = NULL;
 740 #endif
 741         const char *workdir, *rootdir, *token, *rootapi;
 742         struct json_object *settings;
 743         struct afb_hsrv *hsrv;
 744         int max_session_count, session_timeout, api_timeout;
 745         int no_httpd, http_port;
 746         int rc;
 747
 748
 749         afb_debug("start-entry");
 750
 751         if (signum) {
 752                 ERROR("start aborted: received signal %s", strsignal(signum));
 753                 exit(1);
 754         }
 755
 756         settings = NULL;
 757         no_httpd = 0;
 758         http_port = -1;
 759         rootapi = token = NULL;
 760         rc = wrap_json_unpack(main_config, "{"
 761                         "ss ss s?s"
 762                         "si si si"
 763                         "s?b s?i s?s"
 764                         "s?o"
 765                         "}",
 766
 767                         "rootdir", &rootdir,
 768                         "workdir", &workdir,
 769                         "token", &token,
 770
 771                         "apitimeout", &api_timeout,
 772                         "cntxtimeout", &session_timeout,
 773                         "session-max", &max_session_count,
 774
 775                         "no-httpd", &no_httpd,
 776                         "port", &http_port,
 777                         "rootapi", &rootapi,
 778
 779                         "set", &settings
 780                         );
 781         if (rc < 0) {
 782                 ERROR("Unable to get start config");
 783                 exit(1);
 784         }
 785
 786 #if WITH_AFB_HOOK
 787         rc = wrap_json_unpack(main_config, "{"
 788 #if !defined(REMOVE_LEGACY_TRACE)
 789                         "s?s s?s"
 790 #endif
 791                         "s?s s?s s?s s?s s?s"
 792                         "}",
 793
 794 #if !defined(REMOVE_LEGACY_TRACE)
 795                         "tracesvc", &tracesvc,
 796                         "traceditf", &traceditf,
 797 #endif
 798                         "tracereq", &tracereq,
 799                         "traceapi", &traceapi,
 800                         "traceevt", &traceevt,
 801                         "traceses",  &traceses,
 802                         "traceglob", &traceglob
 803                         );
 804         if (rc < 0) {
 805                 ERROR("Unable to get hook config");
 806                 exit(1);
 807         }
 808 #endif
 809
 810         /* initialize session handling */
 811         if (afb_session_init(max_session_count, session_timeout)) {
 812                 ERROR("initialisation of session manager failed");
 813                 goto error;
 814         }
 815
 816         /* set the directories */
 817         mkdir(workdir, S_IRWXU | S_IRGRP | S_IXGRP);
 818         if (chdir(workdir) < 0) {
 819                 ERROR("Can't enter working dir %s", workdir);
 820                 goto error;
 821         }
 822         if (afb_common_rootdir_set(rootdir) < 0) {
 823                 ERROR("failed to set common root directory %s", rootdir);
 824                 goto error;
 825         }
 826         if (addenv_realpath("AFB_WORKDIR", "."     /* resolved by realpath */)
 827          || addenv_realpath("AFB_ROOTDIR", rootdir /* relative to current directory */)) {
 828                 ERROR("can't set DIR environment");
 829                 goto error;
 830         }
 831
 832         /* setup HTTP */
 833         if (!no_httpd) {
 834                 if (http_port == 0) {
 835                         ERROR("random port is not implemented");
 836                         goto error;
 837                 }
 838                 if ((http_port > 0 && addenv_int("AFB_PORT", http_port))
 839                  || (token && addenv("AFB_TOKEN", token))) {
 840                         ERROR("can't set HTTP environment");
 841                         goto error;
 842                 }
 843         }
 844
 845         /* configure the daemon */
 846         afb_export_set_config(settings);
 847         main_apiset = afb_apiset_create("main", api_timeout);
 848         if (!main_apiset) {
 849                 ERROR("can't create main api set");
 850                 goto error;
 851         }
 852         if (afb_monitor_init(main_apiset, main_apiset) < 0) {
 853                 ERROR("failed to setup monitor");
 854                 goto error;
 855         }
 856 #if WITH_SUPERVISION
 857         if (afb_supervision_init(main_apiset, main_config) < 0) {
 858                 ERROR("failed to setup supervision");
 859                 goto error;
 860         }
 861 #endif
 862
 863 #if WITH_AFB_HOOK
 864         /* install hooks */
 865         if (tracereq)
 866                 afb_hook_create_xreq(NULL, NULL, NULL, afb_hook_flags_xreq_from_text(tracereq), NULL, NULL);
 867 #if !defined(REMOVE_LEGACY_TRACE)
 868         if (traceapi || tracesvc || traceditf)
 869                 afb_hook_create_api(NULL, afb_hook_flags_api_from_text(traceapi)
 870                         | afb_hook_flags_legacy_ditf_from_text(traceditf)
 871                         | afb_hook_flags_legacy_svc_from_text(tracesvc), NULL, NULL);
 872 #else
 873         if (traceapi)
 874                 afb_hook_create_api(NULL, afb_hook_flags_api_from_text(traceapi), NULL, NULL);
 875 #endif
 876         if (traceevt)
 877                 afb_hook_create_evt(NULL, afb_hook_flags_evt_from_text(traceevt), NULL, NULL);
 878         if (traceses)
 879                 afb_hook_create_session(NULL, afb_hook_flags_session_from_text(traceses), NULL, NULL);
 880         if (traceglob)
 881                 afb_hook_create_global(afb_hook_flags_global_from_text(traceglob), NULL, NULL);
 882 #endif
 883
 884         /* load bindings and apis */
 885         afb_debug("start-load");
 886 #if WITH_DYNAMIC_BINDING
 887         apiset_start_list("binding", afb_api_so_add_binding, "the binding");
 888         apiset_start_list("ldpaths", afb_api_so_add_pathset_fails, "the binding path set");
 889         apiset_start_list("weak-ldpaths", afb_api_so_add_pathset_nofails, "the weak binding path set");
 890 #endif
 891         apiset_start_list("auto-api", afb_autoset_add_any, "the automatic api path set");
 892 #if WITH_DBUS_TRANSPARENCY
 893         apiset_start_list("dbus-client", afb_api_dbus_add_client, "the afb-dbus client");
 894 #endif
 895         apiset_start_list("ws-client", afb_api_ws_add_client_weak, "the afb-websocket client");
 896
 897         DEBUG("Init config done");
 898
 899         /* start the services */
 900         afb_debug("start-start");
 901 #if !defined(NO_CALL_PERSONALITY)
 902         personality((unsigned long)-1L);
 903 #endif
 904         if (afb_apiset_start_all_services(main_apiset) < 0)
 905                 goto error;
 906
 907         /* export started apis */
 908         apiset_start_list("ws-server", afb_api_ws_add_server, "the afb-websocket service");
 909 #if WITH_DBUS_TRANSPARENCY
 910         apiset_start_list("dbus-server", afb_api_dbus_add_server, "the afb-dbus service");
 911 #endif
 912
 913         /* start the HTTP server */
 914         afb_debug("start-http");
 915         if (!no_httpd) {
 916                 if (!afb_hreq_init_cookie(http_port, rootapi, session_timeout)) {
 917                         ERROR("initialisation of HTTP cookies failed");
 918                         goto error;
 919                 }
 920
 921                 hsrv = start_http_server();
 922                 if (hsrv == NULL)
 923                         goto error;
 924         }
 925
 926         /* run the startup calls */
 927         afb_debug("start-call");
 928         run_startup_calls();
 929
 930         /* run the command */
 931         afb_debug("start-exec");
 932         if (execute_command(http_port, token) < 0)
 933                 goto error;
 934
 935         /* ready */
 936         sd_notify(1, "READY=1");
 937
 938         /* activate the watchdog */
 939 #if HAS_WATCHDOG
 940         if (watchdog_activate() < 0)
 941                 ERROR("can't start the watchdog");
 942 #endif
 943
 944         return;
 945 error:
 946         exit(1);
 947 }
 948
 949 /*---------------------------------------------------------
 950  | main
 951  |   Parse option and launch action
 952  +--------------------------------------------------------- */
 953
 954 int main(int argc, char *argv[])
 955 {
 956         struct json_object *obj;
 957         afb_debug("main-entry");
 958
 959         // ------------- Build session handler & init config -------
 960         main_config = afb_args_parse(argc, argv);
 961         if (sig_monitor_init(
 962                 !json_object_object_get_ex(main_config, "trap-faults", &obj)
 963                         || json_object_get_boolean(obj)) < 0) {
 964                 ERROR("failed to initialise signal handlers");
 965                 return 1;
 966         }
 967
 968
 969         if (json_object_object_get_ex(main_config, "name", &obj)) {
 970                 verbose_set_name(json_object_get_string(obj), 0);
 971                 process_name_set_name(json_object_get_string(obj));
 972                 process_name_replace_cmdline(argv, json_object_get_string(obj));
 973         }
 974         afb_debug("main-args");
 975
 976         // --------- run -----------
 977         daemonize();
 978         INFO("running with pid %d", getpid());
 979
 980         /* set the daemon environment */
 981         setup_daemon();
 982
 983         afb_debug("main-start");
 984
 985         /* enter job processing */
 986         jobs_start(3, 0, 100, start, NULL);
 987         WARNING("hoops returned from jobs_enter! [report bug]");
 988         return 1;
 989 }
 990