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