lib/lws-plat-unix.c

   1 #include "private-libwebsockets.h"
   2
   3 #include <pwd.h>
   4 #include <grp.h>
   5
   6 #ifdef LWS_WITH_PLUGINS
   7 #include <dlfcn.h>
   8 #endif
   9 #include <dirent.h>
  10
  11
  12 /*
  13  * included from libwebsockets.c for unix builds
  14  */
  15
  16 unsigned long long time_in_microseconds(void)
  17 {
  18         struct timeval tv;
  19         gettimeofday(&tv, NULL);
  20         return ((unsigned long long)tv.tv_sec * 1000000LL) + tv.tv_usec;
  21 }
  22
  23 LWS_VISIBLE int
  24 lws_get_random(struct lws_context *context, void *buf, int len)
  25 {
  26         return read(context->fd_random, (char *)buf, len);
  27 }
  28
  29 LWS_VISIBLE int
  30 lws_send_pipe_choked(struct lws *wsi)
  31 {
  32         struct lws_pollfd fds;
  33
  34         /* treat the fact we got a truncated send pending as if we're choked */
  35         if (wsi->trunc_len)
  36                 return 1;
  37
  38         fds.fd = wsi->sock;
  39         fds.events = POLLOUT;
  40         fds.revents = 0;
  41
  42         if (poll(&fds, 1, 0) != 1)
  43                 return 1;
  44
  45         if ((fds.revents & POLLOUT) == 0)
  46                 return 1;
  47
  48         /* okay to send another packet without blocking */
  49
  50         return 0;
  51 }
  52
  53 LWS_VISIBLE int
  54 lws_poll_listen_fd(struct lws_pollfd *fd)
  55 {
  56         return poll(fd, 1, 0);
  57 }
  58
  59 LWS_VISIBLE void
  60 lws_cancel_service_pt(struct lws *wsi)
  61 {
  62         struct lws_context_per_thread *pt = &wsi->context->pt[(int)wsi->tsi];
  63         char buf = 0;
  64
  65         if (write(pt->dummy_pipe_fds[1], &buf, sizeof(buf)) != 1)
  66                 lwsl_err("Cannot write to dummy pipe");
  67 }
  68
  69 LWS_VISIBLE void
  70 lws_cancel_service(struct lws_context *context)
  71 {
  72         struct lws_context_per_thread *pt = &context->pt[0];
  73         char buf = 0, m = context->count_threads;
  74
  75         while (m--) {
  76                 if (write(pt->dummy_pipe_fds[1], &buf, sizeof(buf)) != 1)
  77                         lwsl_err("Cannot write to dummy pipe");
  78                 pt++;
  79         }
  80 }
  81
  82 LWS_VISIBLE void lwsl_emit_syslog(int level, const char *line)
  83 {
  84         int syslog_level = LOG_DEBUG;
  85
  86         switch (level) {
  87         case LLL_ERR:
  88                 syslog_level = LOG_ERR;
  89                 break;
  90         case LLL_WARN:
  91                 syslog_level = LOG_WARNING;
  92                 break;
  93         case LLL_NOTICE:
  94                 syslog_level = LOG_NOTICE;
  95                 break;
  96         case LLL_INFO:
  97                 syslog_level = LOG_INFO;
  98                 break;
  99         }
 100         syslog(syslog_level, "%s", line);
 101 }
 102
 103 LWS_VISIBLE LWS_EXTERN int
 104 _lws_plat_service_tsi(struct lws_context *context, int timeout_ms, int tsi)
 105 {
 106         struct lws_context_per_thread *pt = &context->pt[tsi];
 107         int n = -1, m, c;
 108         char buf;
 109
 110         /* stay dead once we are dead */
 111
 112         if (!context || !context->vhost_list)
 113                 return 1;
 114
 115         if (timeout_ms < 0)
 116                 goto faked_service;
 117
 118         lws_libev_run(context, tsi);
 119         lws_libuv_run(context, tsi);
 120
 121         if (!context->service_tid_detected) {
 122                 struct lws _lws;
 123
 124                 memset(&_lws, 0, sizeof(_lws));
 125                 _lws.context = context;
 126
 127                 context->service_tid_detected =
 128                         context->vhost_list->protocols[0].callback(
 129                         &_lws, LWS_CALLBACK_GET_THREAD_ID, NULL, NULL, 0);
 130         }
 131         context->service_tid = context->service_tid_detected;
 132
 133         /*
 134          * is there anybody with pending stuff that needs service forcing?
 135          */
 136         if (!lws_service_adjust_timeout(context, 1, tsi)) {
 137                 /* -1 timeout means just do forced service */
 138                 _lws_plat_service_tsi(context, -1, pt->tid);
 139                 /* still somebody left who wants forced service? */
 140                 if (!lws_service_adjust_timeout(context, 1, pt->tid))
 141                         /* yes... come back again quickly */
 142                         timeout_ms = 0;
 143         }
 144
 145         n = poll(pt->fds, pt->fds_count, timeout_ms);
 146
 147 #ifdef LWS_OPENSSL_SUPPORT
 148         if (!pt->rx_draining_ext_list &&
 149             !lws_ssl_anybody_has_buffered_read_tsi(context, tsi) && !n) {
 150 #else
 151         if (!pt->rx_draining_ext_list && !n) /* poll timeout */ {
 152 #endif
 153                 lws_service_fd_tsi(context, NULL, tsi);
 154                 return 0;
 155         }
 156
 157 faked_service:
 158         m = lws_service_flag_pending(context, tsi);
 159         if (m)
 160                 c = -1; /* unknown limit */
 161         else
 162                 if (n < 0) {
 163                         if (LWS_ERRNO != LWS_EINTR)
 164                                 return -1;
 165                         return 0;
 166                 } else
 167                         c = n;
 168
 169         /* any socket with events to service? */
 170         for (n = 0; n < pt->fds_count && c; n++) {
 171                 if (!pt->fds[n].revents)
 172                         continue;
 173
 174                 c--;
 175
 176                 if (pt->fds[n].fd == pt->dummy_pipe_fds[0]) {
 177                         if (read(pt->fds[n].fd, &buf, 1) != 1)
 178                                 lwsl_err("Cannot read from dummy pipe.");
 179                         continue;
 180                 }
 181
 182                 m = lws_service_fd_tsi(context, &pt->fds[n], tsi);
 183                 if (m < 0)
 184                         return -1;
 185                 /* if something closed, retry this slot */
 186                 if (m)
 187                         n--;
 188         }
 189
 190         return 0;
 191 }
 192
 193 LWS_VISIBLE int
 194 lws_plat_check_connection_error(struct lws *wsi)
 195 {
 196         return 0;
 197 }
 198
 199 LWS_VISIBLE int
 200 lws_plat_service(struct lws_context *context, int timeout_ms)
 201 {
 202         return _lws_plat_service_tsi(context, timeout_ms, 0);
 203 }
 204
 205 LWS_VISIBLE int
 206 lws_plat_set_socket_options(struct lws_vhost *vhost, int fd)
 207 {
 208         int optval = 1;
 209         socklen_t optlen = sizeof(optval);
 210
 211 #if defined(__APPLE__) || \
 212     defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
 213     defined(__NetBSD__) || \
 214     defined(__OpenBSD__)
 215         struct protoent *tcp_proto;
 216 #endif
 217
 218         if (vhost->ka_time) {
 219                 /* enable keepalive on this socket */
 220                 optval = 1;
 221                 if (setsockopt(fd, SOL_SOCKET, SO_KEEPALIVE,
 222                                (const void *)&optval, optlen) < 0)
 223                         return 1;
 224
 225 #if defined(__APPLE__) || \
 226     defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || \
 227     defined(__NetBSD__) || \
 228         defined(__CYGWIN__) || defined(__OpenBSD__) || defined (__sun)
 229
 230                 /*
 231                  * didn't find a way to set these per-socket, need to
 232                  * tune kernel systemwide values
 233                  */
 234 #else
 235                 /* set the keepalive conditions we want on it too */
 236                 optval = vhost->ka_time;
 237                 if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPIDLE,
 238                                (const void *)&optval, optlen) < 0)
 239                         return 1;
 240
 241                 optval = vhost->ka_interval;
 242                 if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPINTVL,
 243                                (const void *)&optval, optlen) < 0)
 244                         return 1;
 245
 246                 optval = vhost->ka_probes;
 247                 if (setsockopt(fd, IPPROTO_TCP, TCP_KEEPCNT,
 248                                (const void *)&optval, optlen) < 0)
 249                         return 1;
 250 #endif
 251         }
 252
 253         /* Disable Nagle */
 254         optval = 1;
 255 #if defined (__sun)
 256         if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (const void *)&optval, optlen) < 0)
 257                 return 1;
 258 #elif !defined(__APPLE__) && \
 259       !defined(__FreeBSD__) && !defined(__FreeBSD_kernel__) &&        \
 260       !defined(__NetBSD__) && \
 261       !defined(__OpenBSD__)
 262         if (setsockopt(fd, SOL_TCP, TCP_NODELAY, (const void *)&optval, optlen) < 0)
 263                 return 1;
 264 #else
 265         tcp_proto = getprotobyname("TCP");
 266         if (setsockopt(fd, tcp_proto->p_proto, TCP_NODELAY, &optval, optlen) < 0)
 267                 return 1;
 268 #endif
 269
 270         /* We are nonblocking... */
 271         if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0)
 272                 return 1;
 273
 274         return 0;
 275 }
 276
 277 LWS_VISIBLE void
 278 lws_plat_drop_app_privileges(struct lws_context_creation_info *info)
 279 {
 280         if (info->gid != -1)
 281                 if (setgid(info->gid))
 282                         lwsl_warn("setgid: %s\n", strerror(LWS_ERRNO));
 283
 284         if (info->uid != -1) {
 285                 struct passwd *p = getpwuid(info->uid);
 286
 287                 if (p) {
 288                         initgroups(p->pw_name, info->gid);
 289                         if (setuid(info->uid))
 290                                 lwsl_warn("setuid: %s\n", strerror(LWS_ERRNO));
 291                         else
 292                                 lwsl_notice("Set privs to user '%s'\n", p->pw_name);
 293                 } else
 294                         lwsl_warn("getpwuid: unable to find uid %d", info->uid);
 295         }
 296 }
 297
 298 #ifdef LWS_WITH_PLUGINS
 299
 300 #if defined(LWS_USE_LIBUV) && UV_VERSION_MAJOR > 0
 301
 302 /* libuv.c implements these in a cross-platform way */
 303
 304 #else
 305
 306 static int filter(const struct dirent *ent)
 307 {
 308         if (!strcmp(ent->d_name, ".") || !strcmp(ent->d_name, ".."))
 309                 return 0;
 310
 311         return 1;
 312 }
 313
 314 LWS_VISIBLE int
 315 lws_plat_plugins_init(struct lws_context * context, const char * const *d)
 316 {
 317         struct lws_plugin_capability lcaps;
 318         struct lws_plugin *plugin;
 319         lws_plugin_init_func initfunc;
 320         struct dirent **namelist;
 321         int n, i, m, ret = 0;
 322         char path[256];
 323         void *l;
 324
 325         lwsl_notice("  Plugins:\n");
 326
 327         while (d && *d) {
 328                 n = scandir(*d, &namelist, filter, alphasort);
 329                 if (n < 0) {
 330                         lwsl_err("Scandir on %s failed\n", *d);
 331                         return 1;
 332                 }
 333
 334                 for (i = 0; i < n; i++) {
 335                         if (strlen(namelist[i]->d_name) < 7)
 336                                 goto inval;
 337
 338                         lwsl_notice("   %s\n", namelist[i]->d_name);
 339
 340                         lws_snprintf(path, sizeof(path) - 1, "%s/%s", *d,
 341                                  namelist[i]->d_name);
 342                         l = dlopen(path, RTLD_NOW);
 343                         if (!l) {
 344                                 lwsl_err("Error loading DSO: %s\n", dlerror());
 345                                 while (i++ < n)
 346                                         free(namelist[i]);
 347                                 goto bail;
 348                         }
 349                         /* we could open it, can we get his init function? */
 350                         m = lws_snprintf(path, sizeof(path) - 1, "init_%s",
 351                                      namelist[i]->d_name + 3 /* snip lib... */);
 352                         path[m - 3] = '\0'; /* snip the .so */
 353                         initfunc = dlsym(l, path);
 354                         if (!initfunc) {
 355                                 lwsl_err("Failed to get init on %s: %s",
 356                                                 namelist[i]->d_name, dlerror());
 357                                 dlclose(l);
 358                         }
 359                         lcaps.api_magic = LWS_PLUGIN_API_MAGIC;
 360                         m = initfunc(context, &lcaps);
 361                         if (m) {
 362                                 lwsl_err("Initializing %s failed %d\n",
 363                                         namelist[i]->d_name, m);
 364                                 dlclose(l);
 365                                 goto skip;
 366                         }
 367
 368                         plugin = lws_malloc(sizeof(*plugin));
 369                         if (!plugin) {
 370                                 lwsl_err("OOM\n");
 371                                 goto bail;
 372                         }
 373                         plugin->list = context->plugin_list;
 374                         context->plugin_list = plugin;
 375                         strncpy(plugin->name, namelist[i]->d_name, sizeof(plugin->name) - 1);
 376                         plugin->name[sizeof(plugin->name) - 1] = '\0';
 377                         plugin->l = l;
 378                         plugin->caps = lcaps;
 379                         context->plugin_protocol_count += lcaps.count_protocols;
 380                         context->plugin_extension_count += lcaps.count_extensions;
 381
 382                         free(namelist[i]);
 383                         continue;
 384
 385         skip:
 386                         dlclose(l);
 387         inval:
 388                         free(namelist[i]);
 389                 }
 390                 free(namelist);
 391                 d++;
 392         }
 393
 394 bail:
 395         free(namelist);
 396
 397         return ret;
 398 }
 399
 400 LWS_VISIBLE int
 401 lws_plat_plugins_destroy(struct lws_context * context)
 402 {
 403         struct lws_plugin *plugin = context->plugin_list, *p;
 404         lws_plugin_destroy_func func;
 405         char path[256];
 406         int m;
 407
 408         if (!plugin)
 409                 return 0;
 410
 411         lwsl_notice("%s\n", __func__);
 412
 413         while (plugin) {
 414                 p = plugin;
 415                 m = lws_snprintf(path, sizeof(path) - 1, "destroy_%s", plugin->name + 3);
 416                 path[m - 3] = '\0';
 417                 func = dlsym(plugin->l, path);
 418                 if (!func) {
 419                         lwsl_err("Failed to get destroy on %s: %s",
 420                                         plugin->name, dlerror());
 421                         goto next;
 422                 }
 423                 m = func(context);
 424                 if (m)
 425                         lwsl_err("Initializing %s failed %d\n",
 426                                 plugin->name, m);
 427 next:
 428                 dlclose(p->l);
 429                 plugin = p->list;
 430                 p->list = NULL;
 431                 free(p);
 432         }
 433
 434         context->plugin_list = NULL;
 435
 436         return 0;
 437 }
 438
 439 #endif
 440 #endif
 441
 442
 443 #if 0
 444 static void
 445 sigabrt_handler(int x)
 446 {
 447         printf("%s\n", __func__);
 448         //*(char *)0 = 0;
 449 }
 450 #endif
 451
 452 LWS_VISIBLE int
 453 lws_plat_context_early_init(void)
 454 {
 455         signal(SIGPIPE, SIG_IGN);
 456
 457 //      signal(SIGABRT, sigabrt_handler);
 458
 459         return 0;
 460 }
 461
 462 LWS_VISIBLE void
 463 lws_plat_context_early_destroy(struct lws_context *context)
 464 {
 465 }
 466
 467 LWS_VISIBLE void
 468 lws_plat_context_late_destroy(struct lws_context *context)
 469 {
 470         struct lws_context_per_thread *pt = &context->pt[0];
 471         int m = context->count_threads;
 472
 473 #ifdef LWS_WITH_PLUGINS
 474         if (context->plugin_list)
 475                 lws_plat_plugins_destroy(context);
 476 #endif
 477
 478         if (context->lws_lookup)
 479                 lws_free(context->lws_lookup);
 480
 481         while (m--) {
 482                 if (pt->dummy_pipe_fds[0])
 483                         close(pt->dummy_pipe_fds[0]);
 484                 if (pt->dummy_pipe_fds[1])
 485                         close(pt->dummy_pipe_fds[1]);
 486                 pt++;
 487         }
 488         if (!context->fd_random)
 489                 lwsl_err("ZERO RANDOM FD\n");
 490         if (context->fd_random != LWS_INVALID_FILE)
 491                 close(context->fd_random);
 492 }
 493
 494 /* cast a struct sockaddr_in6 * into addr for ipv6 */
 495
 496 LWS_VISIBLE int
 497 lws_interface_to_sa(int ipv6, const char *ifname, struct sockaddr_in *addr,
 498                     size_t addrlen)
 499 {
 500         int rc = -1;
 501
 502         struct ifaddrs *ifr;
 503         struct ifaddrs *ifc;
 504 #ifdef LWS_USE_IPV6
 505         struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
 506 #endif
 507
 508         getifaddrs(&ifr);
 509         for (ifc = ifr; ifc != NULL && rc; ifc = ifc->ifa_next) {
 510                 if (!ifc->ifa_addr)
 511                         continue;
 512
 513                 lwsl_info(" interface %s vs %s\n", ifc->ifa_name, ifname);
 514
 515                 if (strcmp(ifc->ifa_name, ifname))
 516                         continue;
 517
 518                 switch (ifc->ifa_addr->sa_family) {
 519                 case AF_INET:
 520 #ifdef LWS_USE_IPV6
 521                         if (ipv6) {
 522                                 /* map IPv4 to IPv6 */
 523                                 bzero((char *)&addr6->sin6_addr,
 524                                                 sizeof(struct in6_addr));
 525                                 addr6->sin6_addr.s6_addr[10] = 0xff;
 526                                 addr6->sin6_addr.s6_addr[11] = 0xff;
 527                                 memcpy(&addr6->sin6_addr.s6_addr[12],
 528                                         &((struct sockaddr_in *)ifc->ifa_addr)->sin_addr,
 529                                                         sizeof(struct in_addr));
 530                         } else
 531 #endif
 532                                 memcpy(addr,
 533                                         (struct sockaddr_in *)ifc->ifa_addr,
 534                                                     sizeof(struct sockaddr_in));
 535                         break;
 536 #ifdef LWS_USE_IPV6
 537                 case AF_INET6:
 538                         memcpy(&addr6->sin6_addr,
 539                           &((struct sockaddr_in6 *)ifc->ifa_addr)->sin6_addr,
 540                                                        sizeof(struct in6_addr));
 541                         break;
 542 #endif
 543                 default:
 544                         continue;
 545                 }
 546                 rc = 0;
 547         }
 548
 549         freeifaddrs(ifr);
 550
 551         if (rc == -1) {
 552                 /* check if bind to IP address */
 553 #ifdef LWS_USE_IPV6
 554                 if (inet_pton(AF_INET6, ifname, &addr6->sin6_addr) == 1)
 555                         rc = 0;
 556                 else
 557 #endif
 558                 if (inet_pton(AF_INET, ifname, &addr->sin_addr) == 1)
 559                         rc = 0;
 560         }
 561
 562         return rc;
 563 }
 564
 565 LWS_VISIBLE void
 566 lws_plat_insert_socket_into_fds(struct lws_context *context, struct lws *wsi)
 567 {
 568         struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
 569
 570         lws_libev_io(wsi, LWS_EV_START | LWS_EV_READ);
 571         lws_libuv_io(wsi, LWS_EV_START | LWS_EV_READ);
 572
 573         pt->fds[pt->fds_count++].revents = 0;
 574 }
 575
 576 LWS_VISIBLE void
 577 lws_plat_delete_socket_from_fds(struct lws_context *context,
 578                                                 struct lws *wsi, int m)
 579 {
 580         struct lws_context_per_thread *pt = &context->pt[(int)wsi->tsi];
 581
 582         lws_libev_io(wsi, LWS_EV_STOP | LWS_EV_READ | LWS_EV_WRITE);
 583         lws_libuv_io(wsi, LWS_EV_STOP | LWS_EV_READ | LWS_EV_WRITE);
 584
 585         pt->fds_count--;
 586 }
 587
 588 LWS_VISIBLE void
 589 lws_plat_service_periodic(struct lws_context *context)
 590 {
 591         /* if our parent went down, don't linger around */
 592         if (context->started_with_parent &&
 593             kill(context->started_with_parent, 0) < 0)
 594                 kill(getpid(), SIGTERM);
 595 }
 596
 597 LWS_VISIBLE int
 598 lws_plat_change_pollfd(struct lws_context *context,
 599                       struct lws *wsi, struct lws_pollfd *pfd)
 600 {
 601         return 0;
 602 }
 603
 604 LWS_VISIBLE const char *
 605 lws_plat_inet_ntop(int af, const void *src, char *dst, int cnt)
 606 {
 607         return inet_ntop(af, src, dst, cnt);
 608 }
 609
 610 static lws_filefd_type
 611 _lws_plat_file_open(struct lws *wsi, const char *filename,
 612                     unsigned long *filelen, int flags)
 613 {
 614         struct stat stat_buf;
 615         int ret = open(filename, flags, 0664);
 616
 617         if (ret < 0)
 618                 return LWS_INVALID_FILE;
 619
 620         if (fstat(ret, &stat_buf) < 0) {
 621                 close(ret);
 622                 return LWS_INVALID_FILE;
 623         }
 624         *filelen = stat_buf.st_size;
 625         return ret;
 626 }
 627
 628 static int
 629 _lws_plat_file_close(struct lws *wsi, lws_filefd_type fd)
 630 {
 631         return close(fd);
 632 }
 633
 634 unsigned long
 635 _lws_plat_file_seek_cur(struct lws *wsi, lws_filefd_type fd, long offset)
 636 {
 637         return lseek(fd, offset, SEEK_CUR);
 638 }
 639
 640 static int
 641 _lws_plat_file_read(struct lws *wsi, lws_filefd_type fd, unsigned long *amount,
 642                     unsigned char *buf, unsigned long len)
 643 {
 644         long n;
 645
 646         n = read((int)fd, buf, len);
 647         if (n == -1) {
 648                 *amount = 0;
 649                 return -1;
 650         }
 651
 652         *amount = n;
 653
 654         return 0;
 655 }
 656
 657 static int
 658 _lws_plat_file_write(struct lws *wsi, lws_filefd_type fd, unsigned long *amount,
 659                      unsigned char *buf, unsigned long len)
 660 {
 661         long n;
 662
 663         n = write((int)fd, buf, len);
 664         if (n == -1) {
 665                 *amount = 0;
 666                 return -1;
 667         }
 668
 669         *amount = n;
 670
 671         return 0;
 672 }
 673
 674
 675 LWS_VISIBLE int
 676 lws_plat_init(struct lws_context *context,
 677               struct lws_context_creation_info *info)
 678 {
 679         struct lws_context_per_thread *pt = &context->pt[0];
 680         int n = context->count_threads, fd;
 681
 682         /* master context has the global fd lookup array */
 683         context->lws_lookup = lws_zalloc(sizeof(struct lws *) *
 684                                          context->max_fds);
 685         if (context->lws_lookup == NULL) {
 686                 lwsl_err("OOM on lws_lookup array for %d connections\n",
 687                          context->max_fds);
 688                 return 1;
 689         }
 690
 691         lwsl_notice(" mem: platform fd map: %5u bytes\n",
 692                     sizeof(struct lws *) * context->max_fds);
 693         fd = open(SYSTEM_RANDOM_FILEPATH, O_RDONLY);
 694
 695         context->fd_random = fd;
 696         if (context->fd_random < 0) {
 697                 lwsl_err("Unable to open random device %s %d\n",
 698                          SYSTEM_RANDOM_FILEPATH, context->fd_random);
 699                 return 1;
 700         }
 701
 702         if (!lws_libev_init_fd_table(context) &&
 703             !lws_libuv_init_fd_table(context)) {
 704                 /* otherwise libev handled it instead */
 705
 706                 while (n--) {
 707                         if (pipe(pt->dummy_pipe_fds)) {
 708                                 lwsl_err("Unable to create pipe\n");
 709                                 return 1;
 710                         }
 711
 712                         /* use the read end of pipe as first item */
 713                         pt->fds[0].fd = pt->dummy_pipe_fds[0];
 714                         pt->fds[0].events = LWS_POLLIN;
 715                         pt->fds[0].revents = 0;
 716                         pt->fds_count = 1;
 717                         pt++;
 718                 }
 719         }
 720
 721         context->fops.open      = _lws_plat_file_open;
 722         context->fops.close     = _lws_plat_file_close;
 723         context->fops.seek_cur  = _lws_plat_file_seek_cur;
 724         context->fops.read      = _lws_plat_file_read;
 725         context->fops.write     = _lws_plat_file_write;
 726
 727 #ifdef LWS_WITH_PLUGINS
 728         if (info->plugin_dirs)
 729                 lws_plat_plugins_init(context, info->plugin_dirs);
 730 #endif
 731
 732         return 0;
 733 }