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 struct proto_shell_handler {
  24         struct list_head list;
  25         struct proto_handler proto;
  26         struct config_param_list config;
  27         char *config_buf;
  28         char script_name[];
  29 };
  30
  31 struct proto_shell_state {
  32         struct interface_proto_state proto;
  33         struct proto_shell_handler *handler;
  34         struct blob_attr *config;
  35
  36         struct device_user l3_dev;
  37
  38         struct uloop_timeout setup_timeout;
  39         struct netifd_process setup_task;
  40         struct netifd_process teardown_task;
  41         bool teardown_pending;
  42         bool teardown_wait_task;
  43
  44         struct netifd_process proto_task;
  45 };
  46
  47 static int
  48 proto_shell_handler(struct interface_proto_state *proto,
  49                     enum interface_proto_cmd cmd, bool force)
  50 {
  51         struct proto_shell_state *state;
  52         struct proto_shell_handler *handler;
  53         struct netifd_process *proc;
  54         const char *argv[6];
  55         const char *action;
  56         char *config;
  57         int ret, i = 0;
  58
  59         state = container_of(proto, struct proto_shell_state, proto);
  60         handler = state->handler;
  61
  62         if (cmd == PROTO_CMD_SETUP) {
  63                 action = "setup";
  64                 proc = &state->setup_task;
  65         } else {
  66                 action = "teardown";
  67                 proc = &state->teardown_task;
  68                 if (state->setup_task.uloop.pending && !state->teardown_wait_task) {
  69                         uloop_timeout_set(&state->setup_timeout, 1000);
  70                         kill(state->setup_task.uloop.pid, SIGTERM);
  71                         state->teardown_pending = true;
  72                         return 0;
  73                 }
  74         }
  75
  76         config = blobmsg_format_json(state->config, true);
  77         if (!config)
  78                 return -1;
  79
  80         argv[i++] = handler->script_name;
  81         argv[i++] = handler->proto.name;
  82         argv[i++] = action;
  83         argv[i++] = proto->iface->name;
  84         argv[i++] = config;
  85         if (proto->iface->main_dev.dev)
  86                 argv[i++] = proto->iface->main_dev.dev->ifname;
  87         argv[i] = NULL;
  88
  89         ret = netifd_start_process(argv, NULL, proc);
  90         free(config);
  91
  92         return ret;
  93 }
  94
  95 static void
  96 proto_shell_setup_timeout_cb(struct uloop_timeout *timeout)
  97 {
  98         struct proto_shell_state *state;
  99
 100         state = container_of(timeout, struct proto_shell_state, setup_timeout);
 101         kill(state->setup_task.uloop.pid, SIGKILL);
 102 }
 103
 104 static void
 105 proto_shell_setup_cb(struct netifd_process *p, int ret)
 106 {
 107         struct proto_shell_state *state;
 108
 109         state = container_of(p, struct proto_shell_state, setup_task);
 110         uloop_timeout_cancel(&state->setup_timeout);
 111         if (state->teardown_pending) {
 112                 state->teardown_pending = false;
 113                 proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
 114         }
 115 }
 116
 117 static void
 118 proto_shell_teardown_cb(struct netifd_process *p, int ret)
 119 {
 120         struct proto_shell_state *state;
 121
 122         state = container_of(p, struct proto_shell_state, teardown_task);
 123
 124         if (state->teardown_wait_task)
 125                 return;
 126
 127         netifd_kill_process(&state->proto_task);
 128         state->proto.proto_event(&state->proto, IFPEV_DOWN);
 129 }
 130
 131 static void
 132 proto_shell_task_cb(struct netifd_process *p, int ret)
 133 {
 134         struct proto_shell_state *state;
 135         bool teardown_wait_task;
 136
 137         state = container_of(p, struct proto_shell_state, proto_task);
 138
 139         teardown_wait_task = state->teardown_wait_task;
 140         state->teardown_wait_task = false;
 141         if (state->teardown_pending || state->teardown_task.uloop.pending)
 142                 return;
 143
 144         if (teardown_wait_task) {
 145                 proto_shell_teardown_cb(&state->teardown_task, 0);
 146                 return;
 147         }
 148
 149         state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
 150         proto_shell_handler(&state->proto, PROTO_CMD_TEARDOWN, false);
 151 }
 152
 153 static void
 154 proto_shell_free(struct interface_proto_state *proto)
 155 {
 156         struct proto_shell_state *state;
 157
 158         state = container_of(proto, struct proto_shell_state, proto);
 159         free(state->config);
 160         free(state);
 161 }
 162
 163 static void
 164 proto_shell_parse_addr_list(struct interface_ip_settings *ip, struct blob_attr *attr,
 165                             bool v6, bool external)
 166 {
 167         struct device_addr *addr;
 168         struct blob_attr *cur;
 169         int rem;
 170
 171         blobmsg_for_each_attr(cur, attr, rem) {
 172                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING) {
 173                         DPRINTF("Ignore wrong address type: %d\n", blobmsg_type(cur));
 174                         continue;
 175                 }
 176
 177                 addr = proto_parse_ip_addr_string(blobmsg_data(cur), v6, v6 ? 32 : 128);
 178                 if (!addr) {
 179                         DPRINTF("Failed to parse IP address string: %s\n", (char *) blobmsg_data(cur));
 180                         continue;
 181                 }
 182
 183                 if (external)
 184                         addr->flags |= DEVADDR_EXTERNAL;
 185
 186                 vlist_add(&ip->addr, &addr->node);
 187         }
 188 }
 189
 190 enum {
 191         ROUTE_TARGET,
 192         ROUTE_MASK,
 193         ROUTE_GATEWAY,
 194         ROUTE_DEVICE,
 195         __ROUTE_LAST
 196 };
 197
 198 static const struct blobmsg_policy route_attr[__ROUTE_LAST] = {
 199         [ROUTE_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
 200         [ROUTE_MASK] = { .name = "mask", .type = BLOBMSG_TYPE_STRING },
 201         [ROUTE_GATEWAY] = { .name = "gateway", .type = BLOBMSG_TYPE_STRING },
 202         [ROUTE_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
 203 };
 204
 205 static void
 206 parse_route(struct interface_ip_settings *ip, struct blob_attr *attr, bool v6)
 207 {
 208         struct blob_attr *tb[__ROUTE_LAST], *cur;
 209         struct device_route *route;
 210         int af = v6 ? AF_INET6 : AF_INET;
 211
 212         blobmsg_parse(route_attr, __ROUTE_LAST, tb, blobmsg_data(attr), blobmsg_data_len(attr));
 213
 214         if (!tb[ROUTE_GATEWAY] && !tb[ROUTE_DEVICE])
 215                 return;
 216
 217         route = calloc(1, sizeof(*route));
 218         if (!route)
 219                 return;
 220
 221         route->mask = v6 ? 128 : 32;
 222         if ((cur = tb[ROUTE_MASK]) != NULL) {
 223                 route->mask = parse_netmask_string(blobmsg_data(cur), v6);
 224                 if (route->mask > (v6 ? 128 : 32))
 225                         goto error;
 226         }
 227
 228         if ((cur = tb[ROUTE_TARGET]) != NULL) {
 229                 if (!inet_pton(af, blobmsg_data(cur), &route->addr)) {
 230                         DPRINTF("Failed to parse route target: %s\n", (char *) blobmsg_data(cur));
 231                         goto error;
 232                 }
 233         }
 234
 235         if ((cur = tb[ROUTE_GATEWAY]) != NULL) {
 236                 if (!inet_pton(af, blobmsg_data(cur), &route->nexthop)) {
 237                         DPRINTF("Failed to parse route gateway: %s\n", (char *) blobmsg_data(cur));
 238                         goto error;
 239                 }
 240         }
 241
 242         if ((cur = tb[ROUTE_DEVICE]) != NULL)
 243                 route->device = device_get(blobmsg_data(cur), true);
 244
 245         vlist_add(&ip->route, &route->node);
 246         return;
 247
 248 error:
 249         free(route);
 250 }
 251
 252 static void
 253 proto_shell_parse_route_list(struct interface_ip_settings *ip, struct blob_attr *attr,
 254                              bool v6)
 255 {
 256         struct blob_attr *cur;
 257         int rem;
 258
 259         blobmsg_for_each_attr(cur, attr, rem) {
 260                 if (blobmsg_type(cur) != BLOBMSG_TYPE_TABLE) {
 261                         DPRINTF("Ignore wrong route type: %d\n", blobmsg_type(cur));
 262                         continue;
 263                 }
 264
 265                 parse_route(ip, cur, v6);
 266         }
 267 }
 268
 269 enum {
 270         NOTIFY_ACTION,
 271         NOTIFY_COMMAND,
 272         NOTIFY_ENV,
 273         NOTIFY_SIGNAL,
 274         NOTIFY_LINK_UP,
 275         NOTIFY_IFNAME,
 276         NOTIFY_ADDR_EXT,
 277         NOTIFY_IPADDR,
 278         NOTIFY_IP6ADDR,
 279         NOTIFY_ROUTES,
 280         NOTIFY_ROUTES6,
 281         NOTIFY_DNS,
 282         NOTIFY_DNS_SEARCH,
 283         __NOTIFY_LAST
 284 };
 285
 286 static const struct blobmsg_policy notify_attr[__NOTIFY_LAST] = {
 287         [NOTIFY_ACTION] = { .name = "action", .type = BLOBMSG_TYPE_INT32 },
 288         [NOTIFY_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_ARRAY },
 289         [NOTIFY_ENV] = { .name = "env", .type = BLOBMSG_TYPE_ARRAY },
 290         [NOTIFY_SIGNAL] = { .name = "signal", .type = BLOBMSG_TYPE_INT32 },
 291         [NOTIFY_LINK_UP] = { .name = "link-up", .type = BLOBMSG_TYPE_BOOL },
 292         [NOTIFY_IFNAME] = { .name = "ifname", .type = BLOBMSG_TYPE_STRING },
 293         [NOTIFY_ADDR_EXT] = { .name = "address-external", .type = BLOBMSG_TYPE_BOOL },
 294         [NOTIFY_IPADDR] = { .name = "ipaddr", .type = BLOBMSG_TYPE_ARRAY },
 295         [NOTIFY_IP6ADDR] = { .name = "ip6addr", .type = BLOBMSG_TYPE_ARRAY },
 296         [NOTIFY_ROUTES] = { .name = "routes", .type = BLOBMSG_TYPE_ARRAY },
 297         [NOTIFY_ROUTES6] = { .name = "routes6", .type = BLOBMSG_TYPE_ARRAY },
 298         [NOTIFY_DNS] = { .name = "dns", .type = BLOBMSG_TYPE_ARRAY },
 299         [NOTIFY_DNS_SEARCH] = { .name = "dns_search", .type = BLOBMSG_TYPE_ARRAY },
 300 };
 301
 302 static int
 303 proto_shell_update_link(struct proto_shell_state *state, struct blob_attr **tb)
 304 {
 305         struct interface_ip_settings *ip;
 306         struct blob_attr *cur;
 307         bool addr_ext = false;
 308         bool up;
 309
 310         if (!tb[NOTIFY_LINK_UP])
 311                 return UBUS_STATUS_INVALID_ARGUMENT;
 312
 313         up = blobmsg_get_bool(tb[NOTIFY_LINK_UP]);
 314         if (!up) {
 315                 state->proto.proto_event(&state->proto, IFPEV_LINK_LOST);
 316                 return 0;
 317         }
 318
 319         if (!tb[NOTIFY_IFNAME]) {
 320                 if (!state->proto.iface->main_dev.dev)
 321                         return UBUS_STATUS_INVALID_ARGUMENT;
 322         } else {
 323                 if (state->l3_dev.dev)
 324                         device_remove_user(&state->l3_dev);
 325
 326                 device_add_user(&state->l3_dev,
 327                         device_get(blobmsg_data(tb[NOTIFY_IFNAME]), true));
 328                 state->proto.iface->l3_dev = &state->l3_dev;
 329                 device_claim(&state->l3_dev);
 330         }
 331
 332         ip = &state->proto.iface->proto_ip;
 333         interface_ip_update_start(ip);
 334
 335         if ((cur = tb[NOTIFY_ADDR_EXT]) != NULL)
 336                 addr_ext = blobmsg_get_bool(cur);
 337
 338         if ((cur = tb[NOTIFY_IPADDR]) != NULL)
 339                 proto_shell_parse_addr_list(ip, cur, false, addr_ext);
 340
 341         if ((cur = tb[NOTIFY_IP6ADDR]) != NULL)
 342                 proto_shell_parse_addr_list(ip, cur, true, addr_ext);
 343
 344         if ((cur = tb[NOTIFY_ROUTES]) != NULL)
 345                 proto_shell_parse_route_list(ip, cur, false);
 346
 347         if ((cur = tb[NOTIFY_ROUTES6]) != NULL)
 348                 proto_shell_parse_route_list(ip, cur, true);
 349
 350         if ((cur = tb[NOTIFY_DNS]) != NULL)
 351                 interface_add_dns_server_list(ip, cur);
 352
 353         if ((cur = tb[NOTIFY_DNS_SEARCH]) != NULL)
 354                 interface_add_dns_search_list(ip, cur);
 355
 356         interface_ip_update_complete(ip);
 357
 358         state->proto.proto_event(&state->proto, IFPEV_UP);
 359
 360         return 0;
 361 }
 362
 363 static bool
 364 fill_string_list(struct blob_attr *attr, char **argv, int max)
 365 {
 366         struct blob_attr *cur;
 367         int argc = 0;
 368         int rem;
 369
 370         if (!attr)
 371                 goto out;
 372
 373         blobmsg_for_each_attr(cur, attr, rem) {
 374                 if (blobmsg_type(cur) != BLOBMSG_TYPE_STRING)
 375                         return false;
 376
 377                 if (!blobmsg_check_attr(cur, NULL))
 378                         return false;
 379
 380                 argv[argc++] = blobmsg_data(cur);
 381                 if (argc == max - 1)
 382                         return false;
 383         }
 384
 385 out:
 386         argv[argc] = NULL;
 387         return true;
 388 }
 389
 390 static int
 391 proto_shell_run_command(struct proto_shell_state *state, struct blob_attr **tb)
 392 {
 393         char *argv[64];
 394         char *env[32];
 395
 396         if (!tb[NOTIFY_COMMAND])
 397                 goto error;
 398
 399         if (!fill_string_list(tb[NOTIFY_COMMAND], argv, ARRAY_SIZE(argv)))
 400                 goto error;
 401
 402         if (!fill_string_list(tb[NOTIFY_ENV], env, ARRAY_SIZE(env)))
 403                 goto error;
 404
 405         netifd_start_process((const char **) argv, (char **) env, &state->proto_task);
 406
 407         return 0;
 408
 409 error:
 410         return UBUS_STATUS_INVALID_ARGUMENT;
 411 }
 412
 413 static int
 414 proto_shell_kill_command(struct proto_shell_state *state, struct blob_attr **tb)
 415 {
 416         unsigned int signal = ~0;
 417
 418         if (tb[NOTIFY_SIGNAL])
 419                 signal = blobmsg_get_u32(tb[NOTIFY_SIGNAL]);
 420
 421         if (signal > 31)
 422                 signal = SIGTERM;
 423
 424         if (state->proto_task.uloop.pending) {
 425                 kill(state->proto_task.uloop.pid, signal);
 426                 state->teardown_wait_task = true;
 427         }
 428
 429         return 0;
 430 }
 431
 432 static int
 433 proto_shell_notify(struct interface_proto_state *proto, struct blob_attr *attr)
 434 {
 435         struct proto_shell_state *state;
 436         struct blob_attr *tb[__NOTIFY_LAST];
 437
 438         state = container_of(proto, struct proto_shell_state, proto);
 439
 440         blobmsg_parse(notify_attr, __NOTIFY_LAST, tb, blob_data(attr), blob_len(attr));
 441         if (!tb[NOTIFY_ACTION])
 442                 return UBUS_STATUS_INVALID_ARGUMENT;
 443
 444         switch(blobmsg_get_u32(tb[NOTIFY_ACTION])) {
 445         case 0:
 446                 return proto_shell_update_link(state, tb);
 447         case 1:
 448                 return proto_shell_run_command(state, tb);
 449         case 2:
 450                 return proto_shell_kill_command(state, tb);
 451         default:
 452                 return UBUS_STATUS_INVALID_ARGUMENT;
 453         }
 454 }
 455
 456 struct interface_proto_state *
 457 proto_shell_attach(const struct proto_handler *h, struct interface *iface,
 458                    struct blob_attr *attr)
 459 {
 460         struct proto_shell_state *state;
 461
 462         state = calloc(1, sizeof(*state));
 463         state->config = malloc(blob_pad_len(attr));
 464         if (!state->config)
 465                 goto error;
 466
 467         memcpy(state->config, attr, blob_pad_len(attr));
 468         state->proto.free = proto_shell_free;
 469         state->proto.notify = proto_shell_notify;
 470         state->proto.cb = proto_shell_handler;
 471         state->setup_timeout.cb = proto_shell_setup_timeout_cb;
 472         state->setup_task.cb = proto_shell_setup_cb;
 473         state->setup_task.dir_fd = proto_fd.fd;
 474         state->setup_task.log_prefix = iface->name;
 475         state->teardown_task.cb = proto_shell_teardown_cb;
 476         state->teardown_task.dir_fd = proto_fd.fd;
 477         state->teardown_task.log_prefix = iface->name;
 478         state->proto_task.cb = proto_shell_task_cb;
 479         state->proto_task.dir_fd = proto_fd.fd;
 480         state->proto_task.log_prefix = iface->name;
 481         state->handler = container_of(h, struct proto_shell_handler, proto);
 482
 483         return &state->proto;
 484
 485 error:
 486         free(state);
 487         return NULL;
 488 }
 489
 490 static json_object *
 491 check_type(json_object *obj, json_type type)
 492 {
 493         if (!obj)
 494                 return NULL;
 495
 496         if (json_object_get_type(obj) != type)
 497                 return NULL;
 498
 499         return obj;
 500 }
 501
 502 static inline json_object *
 503 get_field(json_object *obj, const char *name, json_type type)
 504 {
 505         return check_type(json_object_object_get(obj, name), type);
 506 }
 507
 508 static char *
 509 proto_shell_parse_config(struct config_param_list *config, json_object *obj)
 510 {
 511         struct blobmsg_policy *attrs;
 512         char *str_buf, *str_cur;
 513         int str_len = 0;
 514         int i;
 515
 516         config->n_params = json_object_array_length(obj);
 517         attrs = calloc(1, sizeof(*attrs) * config->n_params);
 518         if (!attrs)
 519                 return NULL;
 520
 521         config->params = attrs;
 522         for (i = 0; i < config->n_params; i++) {
 523                 json_object *cur, *name, *type;
 524
 525                 cur = check_type(json_object_array_get_idx(obj, i), json_type_array);
 526                 if (!cur)
 527                         goto error;
 528
 529                 name = check_type(json_object_array_get_idx(cur, 0), json_type_string);
 530                 if (!name)
 531                         goto error;
 532
 533                 type = check_type(json_object_array_get_idx(cur, 1), json_type_int);
 534                 if (!type)
 535                         goto error;
 536
 537                 attrs[i].name = json_object_get_string(name);
 538                 attrs[i].type = json_object_get_int(type);
 539                 if (attrs[i].type > BLOBMSG_TYPE_LAST)
 540                         goto error;
 541
 542                 str_len += strlen(attrs[i].name) + 1;
 543         }
 544
 545         str_buf = malloc(str_len);
 546         if (!str_buf)
 547                 goto error;
 548
 549         str_cur = str_buf;
 550         for (i = 0; i < config->n_params; i++) {
 551                 const char *name = attrs[i].name;
 552
 553                 attrs[i].name = str_cur;
 554                 str_cur += sprintf(str_cur, "%s", name) + 1;
 555         }
 556
 557         return str_buf;
 558
 559 error:
 560         free(attrs);
 561         config->n_params = 0;
 562         return NULL;
 563 }
 564
 565 static void
 566 proto_shell_add_handler(const char *script, json_object *obj)
 567 {
 568         struct proto_shell_handler *handler;
 569         struct proto_handler *proto;
 570         json_object *config, *tmp;
 571         const char *name;
 572         char *str;
 573
 574         if (!check_type(obj, json_type_object))
 575                 return;
 576
 577         tmp = get_field(obj, "name", json_type_string);
 578         if (!tmp)
 579                 return;
 580
 581         name = json_object_get_string(tmp);
 582
 583         handler = calloc(1, sizeof(*handler) +
 584                          strlen(script) + 1 +
 585                          strlen(name) + 1);
 586         if (!handler)
 587                 return;
 588
 589         strcpy(handler->script_name, script);
 590
 591         str = handler->script_name + strlen(handler->script_name) + 1;
 592         strcpy(str, name);
 593
 594         proto = &handler->proto;
 595         proto->name = str;
 596         proto->config_params = &handler->config;
 597         proto->attach = proto_shell_attach;
 598
 599         tmp = get_field(obj, "no-device", json_type_boolean);
 600         if (tmp && json_object_get_boolean(tmp))
 601                 handler->proto.flags |= PROTO_FLAG_NODEV;
 602
 603         config = get_field(obj, "config", json_type_array);
 604         if (config)
 605                 handler->config_buf = proto_shell_parse_config(&handler->config, config);
 606
 607         DPRINTF("Add handler for script %s: %s\n", script, proto->name);
 608         add_proto_handler(proto);
 609 }
 610
 611 static void proto_shell_add_script(const char *name)
 612 {
 613         struct json_tokener *tok = NULL;
 614         json_object *obj;
 615         static char buf[512];
 616         char *start, *end, *cmd;
 617         FILE *f;
 618         int buflen, len;
 619
 620 #define DUMP_SUFFIX     " '' dump"
 621
 622         cmd = alloca(strlen(name) + 1 + sizeof(DUMP_SUFFIX));
 623         sprintf(cmd, "%s" DUMP_SUFFIX, name);
 624
 625         f = popen(cmd, "r");
 626         if (!f)
 627                 return;
 628
 629         do {
 630                 buflen = fread(buf, 1, sizeof(buf) - 1, f);
 631                 if (buflen <= 0)
 632                         continue;
 633
 634                 start = buf;
 635                 len = buflen;
 636                 do {
 637                         end = memchr(start, '\n', len);
 638                         if (end)
 639                                 len = end - start;
 640
 641                         if (!tok)
 642                                 tok = json_tokener_new();
 643
 644                         obj = json_tokener_parse_ex(tok, start, len);
 645                         if (!is_error(obj)) {
 646                                 proto_shell_add_handler(name, obj);
 647                                 json_object_put(obj);
 648                                 json_tokener_free(tok);
 649                                 tok = NULL;
 650                         }
 651
 652                         if (end) {
 653                                 start = end + 1;
 654                                 len = buflen - (start - buf);
 655                         }
 656                 } while (len > 0);
 657         } while (!feof(f) && !ferror(f));
 658
 659         if (tok)
 660                 json_tokener_free(tok);
 661
 662         pclose(f);
 663 }
 664
 665 void __init proto_shell_init(void)
 666 {
 667         glob_t g;
 668         int main_fd;
 669         int i;
 670
 671         main_fd = open(".", O_RDONLY | O_DIRECTORY);
 672         if (main_fd < 0)
 673                 return;
 674
 675         if (chdir(main_path)) {
 676                 perror("chdir(main path)");
 677                 goto close_cur;
 678         }
 679
 680         if (chdir("./proto"))
 681                 goto close_cur;
 682
 683         proto_fd.fd = open(".", O_RDONLY | O_DIRECTORY);
 684         if (proto_fd.fd < 0)
 685                 goto close_cur;
 686
 687         netifd_fd_add(&proto_fd);
 688         glob("./*.sh", 0, NULL, &g);
 689         for (i = 0; i < g.gl_pathc; i++)
 690                 proto_shell_add_script(g.gl_pathv[i]);
 691
 692 close_cur:
 693         fchdir(main_fd);
 694         close(main_fd);
 695 }