proto-shell.c

   1 #define _GNU_SOURCE
   2
   3 #include <string.h>
   4 #include <stdlib.h>
   5 #include <stdio.h>
   6 #include <glob.h>
   7 #include <unistd.h>
   8 #include <fcntl.h>
   9 #include <signal.h>
  10
  11 #include <arpa/inet.h>
  12 #include <netinet/in.h>
  13
  14 #include <libubox/blobmsg_json.h>
  15
  16 #include "netifd.h"
  17 #include "interface.h"
  18 #include "interface-ip.h"
  19 #include "proto.h"
  20
  21 static struct netifd_fd proto_fd;
  22
  23 enum proto_shell_sm {
  24         S_IDLE,
  25         S_SETUP,
  26         S_SETUP_ABORT,
  27         S_TEARDOWN,
  28 };
  29
  30 struct proto_shell_handler {
  31         struct list_head list;
  32         struct proto_handler proto;
  33         struct config_param_list config;
  34         char *config_buf;
  35         bool init_available;
  36         char script_name[];
  37 };
  38
  39 struct proto_shell_state {
  40         struct interface_proto_state proto;
  41         struct proto_shell_handler *handler;
  42         struct blob_attr *config;
  43
  44         struct uloop_timeout teardown_timeout;
  45
  46         struct netifd_process script_task;
  47         struct netifd_process proto_task;
  48
  49         enum proto_shell_sm sm;
  50         bool proto_task_killed;
  51
  52         int last_error;
  53 };
  54
  55 static int
  56 proto_shell_handler(struct interface_proto_state *proto,
  57                     enum interface_proto_cmd cmd, bool force)
  58 {
  59         struct proto_shell_state *state;
  60         struct proto_shell_handler *handler;
  61         struct netifd_process *proc;
  62         static char error_buf[32];
  63         const char *argv[7];
  64         char *envp[2];
  65         const char *action;
  66         char *config;
  67         int ret, i = 0, j = 0;
  68
  69         state = container_of(proto, struct proto_shell_state, proto);
  70         handler = state->handler;
  71         proc = &state->script_task;
  72
  73         if (cmd == PROTO_CMD_SETUP) {
  74                 action = "setup";
  75                 state->last_error = -1;
  76         } else {
  77                 if (state->sm == S_TEARDOWN)
  78                         return 0;
  79
  80                 if (state->script_task.uloop.pending) {
  81                         if (state->sm != S_SETUP_ABORT) {
  82                                 uloop_timeout_set(&state->teardown_timeout, 1000);
  83                                 kill(state->script_task.uloop.pid, SIGTERM);
  84                                 if (state->proto_task.uloop.pending)
  85                                         kill(state->proto_task.uloop.pid, SIGTERM);
  86                                 state->sm = S_SETUP_ABORT;
  87                         }
  88                         return 0;
  89                 }
  90
  91                 action = "teardown";
  92                 state->sm = S_TEARDOWN;
  93                 if (state->last_error >= 0) {
  94                         snprintf(error_buf, sizeof(error_buf), "ERROR=%d", state->last_error);
  95                         envp[j++] = error_buf;
  96                 }
  97                 uloop_timeout_set(&state->teardown_timeout, 5000);
  98         }
  99
 100         config = blobmsg_format_json(state->config, true);
 101         if (!config)
 102                 return -1;
 103
 104         argv[i++] = handler->script_name;
 105         argv[i++] = handler->proto.name;
 106         argv[i++] = action;
 107         argv[i++] = proto->iface->name;
 108         argv[i++] = config;
 109         if (proto->iface->main_dev.dev)
 110                 argv[i++] = proto->iface->main_dev.dev->ifname;
 111         argv[i] = NULL;
 112         envp[j] = NULL;
 113
 114         ret = netifd_start_process(argv, envp, proc);
 115         free(config);
 116
 117         return ret;
 118 }
 119
 120 static void
 121 proto_shell_task_finish(struct proto_shell_state *state,
 122                         struct netifd_process *task)
 123 {
 124         switch (state->sm) {
 125         case S_IDLE:
 126                 if (task == &state->proto_task)
 127                         state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
 128                 /* fall through */
 129         case S_SETUP:
 130                 if (task == &state->proto_task)
 131                         proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN,
 132                                             false);
 133                 break;
 134
 135         case S_SETUP_ABORT:
 136                 if (state->script_task.uloop.pending ||
 137                     state->proto_task.uloop.pending)
 138                         break;
 139
 140                 uloop_timeout_cancel(&state->teardown_timeout);
 141                 state->sm = S_IDLE;
 142                 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
 143                 break;
 144
 145         case S_TEARDOWN:
 146                 if (state->script_task.uloop.pending)
 147                         break;
 148
 149                 if (state->proto_task.uloop.pending) {
 150                         if (!state->proto_task_killed)
 151                                 kill(state->proto_task.uloop.pid, SIGTERM);
 152                         break;
 153                 }
 154
 155                 uloop_timeout_cancel(&state->teardown_timeout);
 156                 state->sm = S_IDLE;
 157                 state->proto.proto_event(&state->proto, IFPEV_DOWN);
 158                 break;
 159         }
 160 }
 161
 162 static void
 163 proto_shell_teardown_timeout_cb(struct uloop_timeout *timeout)
 164 {
 165         struct proto_shell_state *state;
 166
 167         state = container_of(timeout, struct proto_shell_state, teardown_timeout);
 168
 169         netifd_kill_process(&state->script_task);
 170         netifd_kill_process(&state->proto_task);
 171         proto_shell_task_finish(state, NULL);
 172 }
 173
 174 static void
 175 proto_shell_script_cb(struct netifd_process *p, int ret)
 176 {
 177         struct proto_shell_state *state;
 178
 179         state = container_of(p, struct proto_shell_state, script_task);
 180         proto_shell_task_finish(state, p);
 181 }
 182
 183 static void
 184 proto_shell_task_cb(struct netifd_process *p, int ret)
 185 {
 186         struct proto_shell_state *state;
 187
 188         state = container_of(p, struct proto_shell_state, proto_task);
 189
 190         if (state->sm == S_IDLE || state->sm == S_SETUP)
 191                 state->last_error = WEXITSTATUS(ret);
 192
 193         proto_shell_task_finish(state, p);
 194 }
 195
 196 static void
 197 proto_shell_free(struct interface_proto_state *proto)
 198 {
 199         struct proto_shell_state *state;
 200
 201         state = container_of(proto, struct proto_shell_state, proto);
 202         netifd_kill_process(&state->script_task);
 203         netifd_kill_process(&state->proto_task);
 204         free(state->config);
 205         free(state);
 206 }
 207
 208 static void
 209 proto_shell_parse_route_list(struct interface *iface, struct blob_attr *attr,
 210                              bool v6)
 211 {
 212         struct blob_attr *cur;
 213         int rem;
 214
 215         blobmsg_for_each_attr(cur, attr, rem) {
 216                 if (blobmsg_type(cur) != BLOBMSG_TYPE_TABLE) {
 217                         DPRINTF("Ignore wrong route type: %d\n", blobmsg_type(cur));
 218                         continue;
 219                 }
 220
 221                 interface_ip_add_route(iface, cur, v6);
 222         }
 223 }
 224
 225 static void
 226 proto_shell_parse_data(struct interface *iface, struct blob_attr *attr)
 227 {
 228         struct blob_attr *cur;
 229         int rem;
 230
 231         blobmsg_for_each_attr(cur, attr, rem)
 232                 interface_add_data(iface, cur);
 233 }
 234
 235 static struct device *
 236 proto_shell_create_tunnel(const char *name, struct blob_attr *attr)
 237 {
 238         struct device *dev;
 239         struct blob_buf b;
 240
 241         memset(&b, 0, sizeof(b));
 242         blob_buf_init(&b, 0);
 243         blob_put(&b, 0, blobmsg_data(attr), blobmsg_data_len(attr));
 244         dev = device_create(name, &tunnel_device_type, blob_data(b.head));
 245         blob_buf_free(&b);
 246
 247         return dev;
 248 }
 249
 250 enum {
 251         NOTIFY_ACTION,
 252         NOTIFY_ERROR,
 253         NOTIFY_COMMAND,
 254         NOTIFY_ENV,
 255         NOTIFY_SIGNAL,
 256         NOTIFY_AVAILABLE,
 257         NOTIFY_LINK_UP,
 258         NOTIFY_IFNAME,
 259         NOTIFY_ADDR_EXT,
 260         NOTIFY_ROUTES,
 261         NOTIFY_ROUTES6,
 262         NOTIFY_TUNNEL,
 263         NOTIFY_DATA,
 264         __NOTIFY_LAST
 265 };
 266
 267 static const struct blobmsg_policy notify_attr[__NOTIFY_LAST] = {
 268         [NOTIFY_ACTION] = { .name = "action", .type = BLOBMSG_TYPE_INT32 },
 269         [NOTIFY_ERROR] = { .name = "error", .type = BLOBMSG_TYPE_ARRAY },
 270         [NOTIFY_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_ARRAY },
 271         [NOTIFY_ENV] = { .name = "env", .type = BLOBMSG_TYPE_ARRAY },
 272         [NOTIFY_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
 273         [NOTIFY_AVAILABLE] = { .name = "available", .type = BLOBMSG_TYPE_BOOL },
 274         [NOTIFY_LINK_UP] = { .name = "link-up", .type = BLOBMSG_TYPE_BOOL },
 275         [NOTIFY_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
 276         [NOTIFY_ADDR_EXT] = { .name = "address-external", .type = BLOBMSG_TYPE_BOOL },
 277         [NOTIFY_ROUTES] = { .name = "routes", .type = BLOBMSG_TYPE_ARRAY },
 278         [NOTIFY_ROUTES6] = { .name = "routes6", .type = BLOBMSG_TYPE_ARRAY },
 279         [NOTIFY_TUNNEL] = { .name = "tunnel", .type = BLOBMSG_TYPE_TABLE },
 280         [NOTIFY_DATA] = { .name = "data", .type = BLOBMSG_TYPE_TABLE },
 281 };
 282
 283 static int
 284 proto_shell_update_link(struct proto_shell_state *state, struct blob_attr *data, struct blob_attr **tb)
 285 {
 286         struct interface *iface = state->proto.iface;
 287         struct blob_attr *cur;
 288         struct device *dev;
 289         const char *devname;
 290         int dev_create = 1;
 291         bool addr_ext = false;
 292         bool up;
 293
 294         if (!tb[NOTIFY_LINK_UP])
 295                 return UBUS_STATUS_INVALID_ARGUMENT;
 296
 297         up = blobmsg_get_bool(tb[NOTIFY_LINK_UP]);
 298         if (!up) {
 299                 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
 300                 return 0;
 301         }
 302
 303         if ((cur = tb[NOTIFY_ADDR_EXT]) != NULL) {
 304                 addr_ext = blobmsg_get_bool(cur);
 305                 if (addr_ext)
 306                         dev_create = 2;
 307         }
 308
 309         if (!tb[NOTIFY_IFNAME]) {
 310                 if (!iface->main_dev.dev)
 311                         return UBUS_STATUS_INVALID_ARGUMENT;
 312         } else {
 313                 devname = blobmsg_data(tb[NOTIFY_IFNAME]);
 314                 if (tb[NOTIFY_TUNNEL]) {
 315                         dev = proto_shell_create_tunnel(devname,
 316                                 tb[NOTIFY_TUNNEL]);
 317                         if (!dev)
 318                                 return UBUS_STATUS_INVALID_ARGUMENT;
 319                 } else {
 320                         dev = device_get(devname, dev_create);
 321                         if (!dev)
 322                                 return UBUS_STATUS_NOT_FOUND;
 323                 }
 324
 325                 interface_set_l3_dev(iface, dev);
 326                 device_claim(&iface->l3_dev);
 327         }
 328
 329         interface_update_start(iface);
 330         proto_apply_ip_settings(iface, data, addr_ext);
 331
 332         if ((cur = tb[NOTIFY_ROUTES]) != NULL)
 333                 proto_shell_parse_route_list(state->proto.iface, cur, false);
 334
 335         if ((cur = tb[NOTIFY_ROUTES6]) != NULL)
 336                 proto_shell_parse_route_list(state->proto.iface, cur, true);
 337
 338         interface_update_complete(state->proto.iface);
 339
 340         state->proto.proto_event(&state->proto, IFPEV_UP);
 341         state->sm = S_IDLE;
 342
 343         if ((cur = tb[NOTIFY_DATA]))
 344                 proto_shell_parse_data(state->proto.iface, cur);
 345
 346         return 0;
 347 }
 348
 349 static bool
 350 fill_string_list(struct blob_attr *attr, char **argv, int max)
 351 {
 352         struct blob_attr *cur;
 353         int argc = 0;
 354         int rem;
 355
 356         if (!attr)
 357                 goto out;
 358
 359         blobmsg_for_each_attr(cur, attr, rem) {
 360                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 361                         return false;
 362
 363                 if (!blobmsg_check_attr(cur, NULL))
 364                         return false;
 365
 366                 argv[argc++] = blobmsg_data(cur);
 367                 if (argc == max - 1)
 368                         return false;
 369         }
 370
 371 out:
 372         argv[argc] = NULL;
 373         return true;
 374 }
 375
 376 static int
 377 proto_shell_run_command(struct proto_shell_state *state, struct blob_attr **tb)
 378 {
 379         static char *argv[64];
 380         static char *env[32];
 381
 382         if (!tb[NOTIFY_COMMAND])
 383                 goto error;
 384
 385         if (!fill_string_list(tb[NOTIFY_COMMAND], argv, ARRAY_SIZE(argv)))
 386                 goto error;
 387
 388         if (!fill_string_list(tb[NOTIFY_ENV], env, ARRAY_SIZE(env)))
 389                 goto error;
 390
 391         netifd_start_process((const char **) argv, (char **) env, &state->proto_task);
 392
 393         return 0;
 394
 395 error:
 396         return UBUS_STATUS_INVALID_ARGUMENT;
 397 }
 398
 399 static int
 400 proto_shell_kill_command(struct proto_shell_state *state, struct blob_attr **tb)
 401 {
 402         unsigned int signal = ~0;
 403
 404         if (tb[NOTIFY_SIGNAL])
 405                 signal = blobmsg_get_u32(tb[NOTIFY_SIGNAL]);
 406
 407         if (signal > 31)
 408                 signal = SIGTERM;
 409
 410         if (state->proto_task.uloop.pending) {
 411                 state->proto_task_killed = true;
 412                 kill(state->proto_task.uloop.pid, signal);
 413         }
 414
 415         return 0;
 416 }
 417
 418 static int
 419 proto_shell_notify_error(struct proto_shell_state *state, struct blob_attr **tb)
 420 {
 421         struct blob_attr *cur;
 422         char *data[16];
 423         int n_data = 0;
 424         int rem;
 425
 426         if (!tb[NOTIFY_ERROR])
 427                 return UBUS_STATUS_INVALID_ARGUMENT;
 428
 429         blobmsg_for_each_attr(cur, tb[NOTIFY_ERROR], rem) {
 430                 if (n_data + 1 == ARRAY_SIZE(data))
 431                         goto error;
 432
 433                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 434                         goto error;
 435
 436                 if (!blobmsg_check_attr(cur, NULL))
 437                         goto error;
 438
 439                 data[n_data++] = blobmsg_data(cur);
 440         }
 441
 442         if (!n_data)
 443                 goto error;
 444
 445         interface_add_error(state->proto.iface, state->handler->proto.name,
 446                         data[0], (const char **) &data[1], n_data - 1);
 447
 448         return 0;
 449
 450 error:
 451         return UBUS_STATUS_INVALID_ARGUMENT;
 452 }
 453
 454 static int
 455 proto_shell_block_restart(struct proto_shell_state *state, struct blob_attr **tb)
 456 {
 457         state->proto.iface->autostart = false;
 458         return 0;
 459 }
 460
 461 static int
 462 proto_shell_set_available(struct proto_shell_state *state, struct blob_attr **tb)
 463 {
 464         if (!tb[NOTIFY_AVAILABLE])
 465                 return UBUS_STATUS_INVALID_ARGUMENT;
 466
 467         interface_set_available(state->proto.iface, blobmsg_get_bool(tb[NOTIFY_AVAILABLE]));
 468         return 0;
 469 }
 470
 471 static int
 472 proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
 473 {
 474         struct proto_shell_state *state;
 475         struct blob_attr *tb[__NOTIFY_LAST];
 476
 477         state = container_of(proto, struct proto_shell_state, proto);
 478
 479         blobmsg_parse(notify_attr, __NOTIFY_LAST, tb, blob_data(attr), blob_len(attr));
 480         if (!tb[NOTIFY_ACTION])
 481                 return UBUS_STATUS_INVALID_ARGUMENT;
 482
 483         switch(blobmsg_get_u32(tb[NOTIFY_ACTION])) {
 484         case 0:
 485                 return proto_shell_update_link(state, attr, tb);
 486         case 1:
 487                 return proto_shell_run_command(state, tb);
 488         case 2:
 489                 return proto_shell_kill_command(state, tb);
 490         case 3:
 491                 return proto_shell_notify_error(state, tb);
 492         case 4:
 493                 return proto_shell_block_restart(state, tb);
 494         case 5:
 495                 return proto_shell_set_available(state, tb);
 496         default:
 497                 return UBUS_STATUS_INVALID_ARGUMENT;
 498         }
 499 }
 500
 501 static struct interface_proto_state *
 502 proto_shell_attach(const struct proto_handler *h, struct interface *iface,
 503                    struct blob_attr *attr)
 504 {
 505         struct proto_shell_state *state;
 506
 507         state = calloc(1, sizeof(*state));
 508         state->config = malloc(blob_pad_len(attr));
 509         if (!state->config)
 510                 goto error;
 511
 512         memcpy(state->config, attr, blob_pad_len(attr));
 513         state->proto.free = proto_shell_free;
 514         state->proto.notify = proto_shell_notify;
 515         state->proto.cb = proto_shell_handler;
 516         state->teardown_timeout.cb = proto_shell_teardown_timeout_cb;
 517         state->script_task.cb = proto_shell_script_cb;
 518         state->script_task.dir_fd = proto_fd.fd;
 519         state->script_task.log_prefix = iface->name;
 520         state->proto_task.cb = proto_shell_task_cb;
 521         state->proto_task.dir_fd = proto_fd.fd;
 522         state->proto_task.log_prefix = iface->name;
 523         state->handler = container_of(h, struct proto_shell_handler, proto);
 524
 525         return &state->proto;
 526
 527 error:
 528         free(state);
 529         return NULL;
 530 }
 531
 532 static json_object *
 533 check_type(json_object *obj, json_type type)
 534 {
 535         if (!obj)
 536                 return NULL;
 537
 538         if (json_object_get_type(obj) != type)
 539                 return NULL;
 540
 541         return obj;
 542 }
 543
 544 static inline json_object *
 545 get_field(json_object *obj, const char *name, json_type type)
 546 {
 547         return check_type(json_object_object_get(obj, name), type);
 548 }
 549
 550 static char *
 551 proto_shell_parse_config(struct config_param_list *config, json_object *obj)
 552 {
 553         struct blobmsg_policy *attrs;
 554         char *str_buf, *str_cur;
 555         int str_len = 0;
 556         int i;
 557
 558         config->n_params = json_object_array_length(obj);
 559         attrs = calloc(1, sizeof(*attrs) * config->n_params);
 560         if (!attrs)
 561                 return NULL;
 562
 563         config->params = attrs;
 564         for (i = 0; i < config->n_params; i++) {
 565                 json_object *cur, *name, *type;
 566
 567                 cur = check_type(json_object_array_get_idx(obj, i), json_type_array);
 568                 if (!cur)
 569                         goto error;
 570
 571                 name = check_type(json_object_array_get_idx(cur, 0), json_type_string);
 572                 if (!name)
 573                         goto error;
 574
 575                 type = check_type(json_object_array_get_idx(cur, 1), json_type_int);
 576                 if (!type)
 577                         goto error;
 578
 579                 attrs[i].name = json_object_get_string(name);
 580                 attrs[i].type = json_object_get_int(type);
 581                 if (attrs[i].type > BLOBMSG_TYPE_LAST)
 582                         goto error;
 583
 584                 str_len += strlen(attrs[i].name) + 1;
 585         }
 586
 587         str_buf = malloc(str_len);
 588         if (!str_buf)
 589                 goto error;
 590
 591         str_cur = str_buf;
 592         for (i = 0; i < config->n_params; i++) {
 593                 const char *name = attrs[i].name;
 594
 595                 attrs[i].name = str_cur;
 596                 str_cur += sprintf(str_cur, "%s", name) + 1;
 597         }
 598
 599         return str_buf;
 600
 601 error:
 602         free(attrs);
 603         config->n_params = 0;
 604         return NULL;
 605 }
 606
 607 static void
 608 proto_shell_add_handler(const char *script, json_object *obj)
 609 {
 610         struct proto_shell_handler *handler;
 611         struct proto_handler *proto;
 612         json_object *config, *tmp;
 613         const char *name;
 614         char *str;
 615
 616         if (!check_type(obj, json_type_object))
 617                 return;
 618
 619         tmp = get_field(obj, "name", json_type_string);
 620         if (!tmp)
 621                 return;
 622
 623         name = json_object_get_string(tmp);
 624
 625         handler = calloc(1, sizeof(*handler) +
 626                          strlen(script) + 1 +
 627                          strlen(name) + 1);
 628         if (!handler)
 629                 return;
 630
 631         strcpy(handler->script_name, script);
 632
 633         str = handler->script_name + strlen(handler->script_name) + 1;
 634         strcpy(str, name);
 635
 636         proto = &handler->proto;
 637         proto->name = str;
 638         proto->config_params = &handler->config;
 639         proto->attach = proto_shell_attach;
 640
 641         tmp = get_field(obj, "no-device", json_type_boolean);
 642         if (tmp && json_object_get_boolean(tmp))
 643                 handler->proto.flags |= PROTO_FLAG_NODEV;
 644
 645         tmp = get_field(obj, "available", json_type_boolean);
 646         if (tmp && json_object_get_boolean(tmp))
 647                 handler->proto.flags |= PROTO_FLAG_INIT_AVAILABLE;
 648
 649         config = get_field(obj, "config", json_type_array);
 650         if (config)
 651                 handler->config_buf = proto_shell_parse_config(&handler->config, config);
 652
 653         DPRINTF("Add handler for script %s: %s\n", script, proto->name);
 654         add_proto_handler(proto);
 655 }
 656
 657 static void proto_shell_add_script(const char *name)
 658 {
 659         struct json_tokener *tok = NULL;
 660         json_object *obj;
 661         static char buf[512];
 662         char *start, *cmd;
 663         FILE *f;
 664         int len;
 665
 666 #define DUMP_SUFFIX     " '' dump"
 667
 668         cmd = alloca(strlen(name) + 1 + sizeof(DUMP_SUFFIX));
 669         sprintf(cmd, "%s" DUMP_SUFFIX, name);
 670
 671         f = popen(cmd, "r");
 672         if (!f)
 673                 return;
 674
 675         do {
 676                 start = fgets(buf, sizeof(buf), f);
 677                 if (!start)
 678                         continue;
 679
 680                 len = strlen(start);
 681
 682                 if (!tok)
 683                         tok = json_tokener_new();
 684
 685                 obj = json_tokener_parse_ex(tok, start, len);
 686                 if (!is_error(obj)) {
 687                         proto_shell_add_handler(name, obj);
 688                         json_object_put(obj);
 689                         json_tokener_free(tok);
 690                         tok = NULL;
 691                 } else if (start[len - 1] == '\n') {
 692                         json_tokener_free(tok);
 693                         tok = NULL;
 694                 }
 695         } while (!feof(f) && !ferror(f));
 696
 697         if (tok)
 698                 json_tokener_free(tok);
 699
 700         pclose(f);
 701 }
 702
 703 static void __init proto_shell_init(void)
 704 {
 705         glob_t g;
 706         int main_fd;
 707         int i;
 708
 709         main_fd = open(".", O_RDONLY | O_DIRECTORY);
 710         if (main_fd < 0)
 711                 return;
 712
 713         if (chdir(main_path)) {
 714                 perror("chdir(main path)");
 715                 goto close_cur;
 716         }
 717
 718         if (chdir("./proto"))
 719                 goto close_cur;
 720
 721         proto_fd.fd = open(".", O_RDONLY | O_DIRECTORY);
 722         if (proto_fd.fd < 0)
 723                 goto close_cur;
 724
 725         netifd_fd_add(&proto_fd);
 726         glob("./*.sh", 0, NULL, &g);
 727         for (i = 0; i < g.gl_pathc; i++)
 728                 proto_shell_add_script(g.gl_pathv[i]);
 729
 730 close_cur:
 731         fchdir(main_fd);
 732         close(main_fd);
 733 }