system.c

   1 /*
   2  * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
   3  * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU Lesser General Public License version 2.1
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <sys/utsname.h>
  16 #ifdef linux
  17 #include <sys/sysinfo.h>
  18 #endif
  19 #include <sys/ioctl.h>
  20 #include <sys/types.h>
  21 #include <sys/reboot.h>
  22 #include <sys/stat.h>
  23 #include <fcntl.h>
  24 #include <signal.h>
  25 #include <unistd.h>
  26 #include <stdlib.h>
  27
  28 #include <json-c/json_tokener.h>
  29 #include <libubox/blobmsg_json.h>
  30 #include <libubox/uloop.h>
  31
  32 #include "procd.h"
  33 #include "sysupgrade.h"
  34 #include "watchdog.h"
  35
  36 static struct blob_buf b;
  37 static int notify;
  38 static struct ubus_context *_ctx;
  39
  40 enum vjson_state {
  41         VJSON_ERROR,
  42         VJSON_CONTINUE,
  43         VJSON_SUCCESS,
  44 };
  45
  46 static int system_board(struct ubus_context *ctx, struct ubus_object *obj,
  47                  struct ubus_request_data *req, const char *method,
  48                  struct blob_attr *msg)
  49 {
  50         void *c;
  51         char line[256];
  52         char *key, *val, *next;
  53         struct utsname utsname;
  54         FILE *f;
  55
  56         blob_buf_init(&b, 0);
  57
  58         if (uname(&utsname) >= 0)
  59         {
  60                 blobmsg_add_string(&b, "kernel", utsname.release);
  61                 blobmsg_add_string(&b, "hostname", utsname.nodename);
  62         }
  63
  64         if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
  65         {
  66                 while(fgets(line, sizeof(line), f))
  67                 {
  68                         key = strtok(line, "\t:");
  69                         val = strtok(NULL, "\t\n");
  70
  71                         if (!key || !val)
  72                                 continue;
  73
  74                         if (!strcasecmp(key, "system type") ||
  75                             !strcasecmp(key, "processor") ||
  76                             !strcasecmp(key, "cpu") ||
  77                             !strcasecmp(key, "model name"))
  78                         {
  79                                 strtoul(val + 2, &key, 0);
  80
  81                                 if (key == (val + 2) || *key != 0)
  82                                 {
  83                                         blobmsg_add_string(&b, "system", val + 2);
  84                                         break;
  85                                 }
  86                         }
  87                 }
  88
  89                 fclose(f);
  90         }
  91
  92         if ((f = fopen("/tmp/sysinfo/model", "r")) != NULL ||
  93             (f = fopen("/proc/device-tree/model", "r")) != NULL)
  94         {
  95                 if (fgets(line, sizeof(line), f))
  96                 {
  97                         val = strtok(line, "\t\n");
  98
  99                         if (val)
 100                                 blobmsg_add_string(&b, "model", val);
 101                 }
 102
 103                 fclose(f);
 104         }
 105         else if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
 106         {
 107                 while(fgets(line, sizeof(line), f))
 108                 {
 109                         key = strtok(line, "\t:");
 110                         val = strtok(NULL, "\t\n");
 111
 112                         if (!key || !val)
 113                                 continue;
 114
 115                         if (!strcasecmp(key, "machine") ||
 116                             !strcasecmp(key, "hardware"))
 117                         {
 118                                 blobmsg_add_string(&b, "model", val + 2);
 119                                 break;
 120                         }
 121                 }
 122
 123                 fclose(f);
 124         }
 125
 126         if ((f = fopen("/tmp/sysinfo/board_name", "r")) != NULL)
 127         {
 128                 if (fgets(line, sizeof(line), f))
 129                 {
 130                         val = strtok(line, "\t\n");
 131
 132                         if (val)
 133                                 blobmsg_add_string(&b, "board_name", val);
 134                 }
 135
 136                 fclose(f);
 137         }
 138         else if ((f = fopen("/proc/device-tree/compatible", "r")) != NULL)
 139         {
 140                 if (fgets(line, sizeof(line), f))
 141                 {
 142                         val = strtok(line, "\t\n");
 143
 144                         if (val)
 145                         {
 146                                 next = val;
 147                                 while ((next = strchr(next, ',')) != NULL)
 148                                 {
 149                                         *next = '-';
 150                                         next++;
 151                                 }
 152
 153                                 blobmsg_add_string(&b, "board_name", val);
 154                         }
 155                 }
 156
 157                 fclose(f);
 158         }
 159
 160         if ((f = fopen("/etc/openwrt_release", "r")) != NULL)
 161         {
 162                 c = blobmsg_open_table(&b, "release");
 163
 164                 while (fgets(line, sizeof(line), f))
 165                 {
 166                         char *dest;
 167                         char ch;
 168
 169                         key = line;
 170                         val = strchr(line, '=');
 171                         if (!val)
 172                                 continue;
 173
 174                         *(val++) = 0;
 175
 176                         if (!strcasecmp(key, "DISTRIB_ID"))
 177                                 key = "distribution";
 178                         else if (!strcasecmp(key, "DISTRIB_RELEASE"))
 179                                 key = "version";
 180                         else if (!strcasecmp(key, "DISTRIB_REVISION"))
 181                                 key = "revision";
 182                         else if (!strcasecmp(key, "DISTRIB_CODENAME"))
 183                                 key = "codename";
 184                         else if (!strcasecmp(key, "DISTRIB_TARGET"))
 185                                 key = "target";
 186                         else if (!strcasecmp(key, "DISTRIB_DESCRIPTION"))
 187                                 key = "description";
 188                         else
 189                                 continue;
 190
 191                         dest = blobmsg_alloc_string_buffer(&b, key, strlen(val));
 192                         if (!dest) {
 193                                 ERROR("Failed to allocate blob.\n");
 194                                 continue;
 195                         }
 196
 197                         while (val && (ch = *(val++)) != 0) {
 198                                 switch (ch) {
 199                                 case '\'':
 200                                 case '"':
 201                                         next = strchr(val, ch);
 202                                         if (next)
 203                                                 *next = 0;
 204
 205                                         strcpy(dest, val);
 206
 207                                         if (next)
 208                                                 val = next + 1;
 209
 210                                         dest += strlen(dest);
 211                                         break;
 212                                 case '\\':
 213                                         *(dest++) = *(val++);
 214                                         break;
 215                                 }
 216                         }
 217                         blobmsg_add_string_buffer(&b);
 218                 }
 219
 220                 blobmsg_close_array(&b, c);
 221
 222                 fclose(f);
 223         }
 224
 225         ubus_send_reply(ctx, req, b.head);
 226
 227         return UBUS_STATUS_OK;
 228 }
 229
 230 static int system_info(struct ubus_context *ctx, struct ubus_object *obj,
 231                 struct ubus_request_data *req, const char *method,
 232                 struct blob_attr *msg)
 233 {
 234         time_t now;
 235         struct tm *tm;
 236 #ifdef linux
 237         struct sysinfo info;
 238         void *c;
 239         char line[256];
 240         char *key, *val;
 241         unsigned long long available, cached;
 242         FILE *f;
 243
 244         if (sysinfo(&info))
 245                 return UBUS_STATUS_UNKNOWN_ERROR;
 246
 247         if ((f = fopen("/proc/meminfo", "r")) == NULL)
 248                 return UBUS_STATUS_UNKNOWN_ERROR;
 249
 250         /* if linux < 3.14 MemAvailable is not in meminfo */
 251         available = 0;
 252         cached = 0;
 253
 254         while (fgets(line, sizeof(line), f))
 255         {
 256                 key = strtok(line, " :");
 257                 val = strtok(NULL, " ");
 258
 259                 if (!key || !val)
 260                         continue;
 261
 262                 if (!strcasecmp(key, "MemAvailable"))
 263                         available = 1024 * atoll(val);
 264                 else if (!strcasecmp(key, "Cached"))
 265                         cached = 1024 * atoll(val);
 266         }
 267
 268         fclose(f);
 269 #endif
 270
 271         now = time(NULL);
 272
 273         if (!(tm = localtime(&now)))
 274                 return UBUS_STATUS_UNKNOWN_ERROR;
 275
 276         blob_buf_init(&b, 0);
 277
 278         blobmsg_add_u32(&b, "localtime", now + tm->tm_gmtoff);
 279
 280 #ifdef linux
 281         blobmsg_add_u32(&b, "uptime",    info.uptime);
 282
 283         c = blobmsg_open_array(&b, "load");
 284         blobmsg_add_u32(&b, NULL, info.loads[0]);
 285         blobmsg_add_u32(&b, NULL, info.loads[1]);
 286         blobmsg_add_u32(&b, NULL, info.loads[2]);
 287         blobmsg_close_array(&b, c);
 288
 289         c = blobmsg_open_table(&b, "memory");
 290         blobmsg_add_u64(&b, "total",
 291                         (uint64_t)info.mem_unit * (uint64_t)info.totalram);
 292         blobmsg_add_u64(&b, "free",
 293                         (uint64_t)info.mem_unit * (uint64_t)info.freeram);
 294         blobmsg_add_u64(&b, "shared",
 295                         (uint64_t)info.mem_unit * (uint64_t)info.sharedram);
 296         blobmsg_add_u64(&b, "buffered",
 297                         (uint64_t)info.mem_unit * (uint64_t)info.bufferram);
 298         blobmsg_add_u64(&b, "available", available);
 299         blobmsg_add_u64(&b, "cached", cached);
 300         blobmsg_close_table(&b, c);
 301
 302         c = blobmsg_open_table(&b, "swap");
 303         blobmsg_add_u64(&b, "total",
 304                         (uint64_t)info.mem_unit * (uint64_t)info.totalswap);
 305         blobmsg_add_u64(&b, "free",
 306                         (uint64_t)info.mem_unit * (uint64_t)info.freeswap);
 307         blobmsg_close_table(&b, c);
 308 #endif
 309
 310         ubus_send_reply(ctx, req, b.head);
 311
 312         return UBUS_STATUS_OK;
 313 }
 314
 315 static int system_reboot(struct ubus_context *ctx, struct ubus_object *obj,
 316                          struct ubus_request_data *req, const char *method,
 317                          struct blob_attr *msg)
 318 {
 319         procd_shutdown(RB_AUTOBOOT);
 320         return 0;
 321 }
 322
 323 enum {
 324         WDT_FREQUENCY,
 325         WDT_TIMEOUT,
 326         WDT_MAGICCLOSE,
 327         WDT_STOP,
 328         __WDT_MAX
 329 };
 330
 331 static const struct blobmsg_policy watchdog_policy[__WDT_MAX] = {
 332         [WDT_FREQUENCY] = { .name = "frequency", .type = BLOBMSG_TYPE_INT32 },
 333         [WDT_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
 334         [WDT_MAGICCLOSE] = { .name = "magicclose", .type = BLOBMSG_TYPE_BOOL },
 335         [WDT_STOP] = { .name = "stop", .type = BLOBMSG_TYPE_BOOL },
 336 };
 337
 338 static int watchdog_set(struct ubus_context *ctx, struct ubus_object *obj,
 339                         struct ubus_request_data *req, const char *method,
 340                         struct blob_attr *msg)
 341 {
 342         struct blob_attr *tb[__WDT_MAX];
 343         const char *status;
 344
 345         if (!msg)
 346                 return UBUS_STATUS_INVALID_ARGUMENT;
 347
 348         blobmsg_parse(watchdog_policy, __WDT_MAX, tb, blob_data(msg), blob_len(msg));
 349         if (tb[WDT_FREQUENCY]) {
 350                 unsigned int timeout = tb[WDT_TIMEOUT] ? blobmsg_get_u32(tb[WDT_TIMEOUT]) :
 351                                                 watchdog_timeout(0);
 352                 unsigned int freq = blobmsg_get_u32(tb[WDT_FREQUENCY]);
 353
 354                 if (freq) {
 355                         if (freq > timeout / 2)
 356                                 freq = timeout / 2;
 357                         watchdog_frequency(freq);
 358                 }
 359         }
 360
 361         if (tb[WDT_TIMEOUT]) {
 362                 unsigned int timeout = blobmsg_get_u32(tb[WDT_TIMEOUT]);
 363                 unsigned int frequency = watchdog_frequency(0);
 364
 365                 if (timeout <= frequency)
 366                         timeout = frequency * 2;
 367                 watchdog_timeout(timeout);
 368         }
 369
 370         if (tb[WDT_MAGICCLOSE])
 371                 watchdog_set_magicclose(blobmsg_get_bool(tb[WDT_MAGICCLOSE]));
 372
 373         if (tb[WDT_STOP])
 374                 watchdog_set_stopped(blobmsg_get_bool(tb[WDT_STOP]));
 375
 376         if (watchdog_fd() == NULL)
 377                 status = "offline";
 378         else if (watchdog_get_stopped())
 379                 status = "stopped";
 380         else
 381                 status = "running";
 382
 383         blob_buf_init(&b, 0);
 384         blobmsg_add_string(&b, "status", status);
 385         blobmsg_add_u32(&b, "timeout", watchdog_timeout(0));
 386         blobmsg_add_u32(&b, "frequency", watchdog_frequency(0));
 387         blobmsg_add_u8(&b, "magicclose", watchdog_get_magicclose());
 388         ubus_send_reply(ctx, req, b.head);
 389
 390         return 0;
 391 }
 392
 393 enum {
 394         SIGNAL_PID,
 395         SIGNAL_NUM,
 396         __SIGNAL_MAX
 397 };
 398
 399 static const struct blobmsg_policy signal_policy[__SIGNAL_MAX] = {
 400         [SIGNAL_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 401         [SIGNAL_NUM] = { .name = "signum", .type = BLOBMSG_TYPE_INT32 },
 402 };
 403
 404 static int proc_signal(struct ubus_context *ctx, struct ubus_object *obj,
 405                         struct ubus_request_data *req, const char *method,
 406                         struct blob_attr *msg)
 407 {
 408         struct blob_attr *tb[__SIGNAL_MAX];
 409
 410         if (!msg)
 411                 return UBUS_STATUS_INVALID_ARGUMENT;
 412
 413         blobmsg_parse(signal_policy, __SIGNAL_MAX, tb, blob_data(msg), blob_len(msg));
 414         if (!tb[SIGNAL_PID || !tb[SIGNAL_NUM]])
 415                 return UBUS_STATUS_INVALID_ARGUMENT;
 416
 417         kill(blobmsg_get_u32(tb[SIGNAL_PID]), blobmsg_get_u32(tb[SIGNAL_NUM]));
 418
 419         return 0;
 420 }
 421
 422 __attribute__((format (printf, 2, 3)))
 423 static enum vjson_state vjson_error(char **b, const char *fmt, ...)
 424 {
 425         static char buf[256] = { 0 };
 426         const char *pfx = "Firmware image couldn't be validated: ";
 427         va_list va;
 428         int r;
 429
 430         r = snprintf(buf, sizeof(buf), "%s", pfx);
 431         if (r < 0) {
 432                 *b = "vjson_error() snprintf failed";
 433                 return VJSON_ERROR;
 434         }
 435
 436         va_start(va, fmt);
 437         r = vsnprintf(buf+r, sizeof(buf)-r, fmt, va);
 438         if (r < 0) {
 439                 *b = "vjson_error() vsnprintf failed";
 440                 return VJSON_ERROR;
 441         }
 442         va_end(va);
 443
 444         *b = buf;
 445         return VJSON_ERROR;
 446 }
 447
 448 static enum vjson_state vjson_parse_token(json_tokener *tok, char *buf, ssize_t len, char **err)
 449 {
 450         json_object *jsobj = NULL;
 451
 452         jsobj = json_tokener_parse_ex(tok, buf, len);
 453         if (json_tokener_get_error(tok) == json_tokener_continue)
 454                 return VJSON_CONTINUE;
 455
 456         if (json_tokener_get_error(tok) == json_tokener_success) {
 457                 if (json_object_get_type(jsobj) != json_type_object) {
 458                         json_object_put(jsobj);
 459                         return vjson_error(err, "result is not an JSON object");
 460                 }
 461
 462                 blobmsg_add_object(&b, jsobj);
 463                 json_object_put(jsobj);
 464                 return VJSON_SUCCESS;
 465         }
 466
 467         return vjson_error(err, "failed to parse JSON: %s (%d)",
 468                            json_tokener_error_desc(json_tokener_get_error(tok)),
 469                            json_tokener_get_error(tok));
 470 }
 471
 472 static enum vjson_state vjson_parse(int fd, char **err)
 473 {
 474         enum vjson_state r = VJSON_ERROR;
 475         size_t read_count = 0;
 476         char buf[64] = { 0 };
 477         json_tokener *tok;
 478         ssize_t len;
 479         int _errno;
 480
 481         tok = json_tokener_new();
 482         if (!tok)
 483                 return vjson_error(err, "json_tokener_new() failed");
 484
 485         vjson_error(err, "incomplete JSON input");
 486
 487         while ((len = read(fd, buf, sizeof(buf)))) {
 488                 if (len < 0 && errno == EINTR)
 489                         continue;
 490
 491                 if (len < 0) {
 492                         _errno = errno;
 493                         json_tokener_free(tok);
 494                         return vjson_error(err, "read() failed: %s (%d)",
 495                                            strerror(_errno), _errno);
 496                 }
 497
 498                 read_count += len;
 499                 r = vjson_parse_token(tok, buf, len, err);
 500                 if (r != VJSON_CONTINUE)
 501                         break;
 502
 503                 memset(buf, 0, sizeof(buf));
 504         }
 505
 506         if (read_count == 0)
 507                 vjson_error(err, "no JSON input");
 508
 509         json_tokener_free(tok);
 510         return r;
 511 }
 512
 513 /**
 514  * validate_firmware_image_call - perform validation & store result in global b
 515  *
 516  * @file: firmware image path
 517  */
 518 static enum vjson_state validate_firmware_image_call(const char *file, char **err)
 519 {
 520         const char *path = "/usr/libexec/validate_firmware_image";
 521         enum vjson_state ret = VJSON_ERROR;
 522         int _errno;
 523         int fds[2];
 524         int fd;
 525
 526         blob_buf_init(&b, 0);
 527         vjson_error(err, "unhandled error");
 528
 529         if (pipe(fds)) {
 530                 _errno = errno;
 531                 return vjson_error(err, "pipe() failed: %s (%d)",
 532                                    strerror(_errno), _errno);
 533         }
 534
 535         switch (fork()) {
 536         case -1:
 537                 _errno = errno;
 538
 539                 close(fds[0]);
 540                 close(fds[1]);
 541
 542                 return vjson_error(err, "fork() failed: %s (%d)",
 543                                    strerror(_errno), _errno);
 544         case 0:
 545                 /* Set stdin & stderr to /dev/null */
 546                 fd = open("/dev/null", O_RDWR);
 547                 if (fd >= 0) {
 548                         dup2(fd, 0);
 549                         dup2(fd, 2);
 550                         close(fd);
 551                 }
 552
 553                 /* Set stdout to the shared pipe */
 554                 dup2(fds[1], 1);
 555                 close(fds[0]);
 556                 close(fds[1]);
 557
 558                 execl(path, path, file, NULL);
 559                 exit(errno);
 560         }
 561
 562         /* Parent process */
 563         close(fds[1]);
 564
 565         ret = vjson_parse(fds[0], err);
 566         close(fds[0]);
 567
 568         return ret;
 569 }
 570
 571 enum {
 572         VALIDATE_FIRMWARE_IMAGE_PATH,
 573         __VALIDATE_FIRMWARE_IMAGE_MAX,
 574 };
 575
 576 static const struct blobmsg_policy validate_firmware_image_policy[__VALIDATE_FIRMWARE_IMAGE_MAX] = {
 577         [VALIDATE_FIRMWARE_IMAGE_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
 578 };
 579
 580 static int validate_firmware_image(struct ubus_context *ctx,
 581                                    struct ubus_object *obj,
 582                                    struct ubus_request_data *req,
 583                                    const char *method, struct blob_attr *msg)
 584 {
 585         struct blob_attr *tb[__VALIDATE_FIRMWARE_IMAGE_MAX];
 586         enum vjson_state ret = VJSON_ERROR;
 587         char *err;
 588
 589         if (!msg)
 590                 return UBUS_STATUS_INVALID_ARGUMENT;
 591
 592         blobmsg_parse(validate_firmware_image_policy, __VALIDATE_FIRMWARE_IMAGE_MAX, tb, blob_data(msg), blob_len(msg));
 593         if (!tb[VALIDATE_FIRMWARE_IMAGE_PATH])
 594                 return UBUS_STATUS_INVALID_ARGUMENT;
 595
 596         ret = validate_firmware_image_call(blobmsg_get_string(tb[VALIDATE_FIRMWARE_IMAGE_PATH]), &err);
 597         if (ret != VJSON_SUCCESS)
 598                 return UBUS_STATUS_UNKNOWN_ERROR;
 599
 600         ubus_send_reply(ctx, req, b.head);
 601
 602         return UBUS_STATUS_OK;
 603 }
 604
 605 enum {
 606         SYSUPGRADE_PATH,
 607         SYSUPGRADE_FORCE,
 608         SYSUPGRADE_BACKUP,
 609         SYSUPGRADE_PREFIX,
 610         SYSUPGRADE_COMMAND,
 611         SYSUPGRADE_OPTIONS,
 612         __SYSUPGRADE_MAX
 613 };
 614
 615 static const struct blobmsg_policy sysupgrade_policy[__SYSUPGRADE_MAX] = {
 616         [SYSUPGRADE_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
 617         [SYSUPGRADE_FORCE] = { .name = "force", .type = BLOBMSG_TYPE_BOOL },
 618         [SYSUPGRADE_BACKUP] = { .name = "backup", .type = BLOBMSG_TYPE_STRING },
 619         [SYSUPGRADE_PREFIX] = { .name = "prefix", .type = BLOBMSG_TYPE_STRING },
 620         [SYSUPGRADE_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_STRING },
 621         [SYSUPGRADE_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_TABLE },
 622 };
 623
 624 static void sysupgrade_error(struct ubus_context *ctx,
 625                              struct ubus_request_data *req,
 626                              const char *message)
 627 {
 628         void *c;
 629
 630         blob_buf_init(&b, 0);
 631
 632         c = blobmsg_open_table(&b, "error");
 633         blobmsg_add_string(&b, "message", message);
 634         blobmsg_close_table(&b, c);
 635
 636         ubus_send_reply(ctx, req, b.head);
 637 }
 638
 639 static int sysupgrade(struct ubus_context *ctx, struct ubus_object *obj,
 640                       struct ubus_request_data *req, const char *method,
 641                       struct blob_attr *msg)
 642 {
 643         enum {
 644                 VALIDATION_VALID,
 645                 VALIDATION_FORCEABLE,
 646                 VALIDATION_ALLOW_BACKUP,
 647                 __VALIDATION_MAX
 648         };
 649         static const struct blobmsg_policy validation_policy[__VALIDATION_MAX] = {
 650                 [VALIDATION_VALID] = { .name = "valid", .type = BLOBMSG_TYPE_BOOL },
 651                 [VALIDATION_FORCEABLE] = { .name = "forceable", .type = BLOBMSG_TYPE_BOOL },
 652                 [VALIDATION_ALLOW_BACKUP] = { .name = "allow_backup", .type = BLOBMSG_TYPE_BOOL },
 653         };
 654         struct blob_attr *validation[__VALIDATION_MAX];
 655         struct blob_attr *tb[__SYSUPGRADE_MAX];
 656         bool valid, forceable, allow_backup;
 657         enum vjson_state ret = VJSON_ERROR;
 658         char *err;
 659
 660         if (!msg)
 661                 return UBUS_STATUS_INVALID_ARGUMENT;
 662
 663         blobmsg_parse(sysupgrade_policy, __SYSUPGRADE_MAX, tb, blob_data(msg), blob_len(msg));
 664         if (!tb[SYSUPGRADE_PATH] || !tb[SYSUPGRADE_PREFIX])
 665                 return UBUS_STATUS_INVALID_ARGUMENT;
 666
 667         ret = validate_firmware_image_call(blobmsg_get_string(tb[SYSUPGRADE_PATH]), &err);
 668         if (ret != VJSON_SUCCESS) {
 669                 sysupgrade_error(ctx, req, err);
 670                 return UBUS_STATUS_UNKNOWN_ERROR;
 671         }
 672
 673         blobmsg_parse(validation_policy, __VALIDATION_MAX, validation, blob_data(b.head), blob_len(b.head));
 674
 675         if (!validation[VALIDATION_VALID] || !validation[VALIDATION_FORCEABLE] ||
 676             !validation[VALIDATION_ALLOW_BACKUP]) {
 677                 sysupgrade_error(ctx, req, "Validation script provided invalid input");
 678                 return UBUS_STATUS_INVALID_ARGUMENT;
 679         }
 680
 681         valid = validation[VALIDATION_VALID] && blobmsg_get_bool(validation[VALIDATION_VALID]);
 682         forceable = validation[VALIDATION_FORCEABLE] && blobmsg_get_bool(validation[VALIDATION_FORCEABLE]);
 683         allow_backup = validation[VALIDATION_ALLOW_BACKUP] && blobmsg_get_bool(validation[VALIDATION_ALLOW_BACKUP]);
 684
 685         if (!valid) {
 686                 if (!forceable) {
 687                         sysupgrade_error(ctx, req, "Firmware image is broken and cannot be installed");
 688                         return UBUS_STATUS_NOT_SUPPORTED;
 689                 } else if (!tb[SYSUPGRADE_FORCE] || !blobmsg_get_bool(tb[SYSUPGRADE_FORCE])) {
 690                         sysupgrade_error(ctx, req, "Firmware image is invalid");
 691                         return UBUS_STATUS_NOT_SUPPORTED;
 692                 }
 693         } else if (!allow_backup && tb[SYSUPGRADE_BACKUP]) {
 694                 sysupgrade_error(ctx, req, "Firmware image doesn't allow preserving a backup");
 695                 return UBUS_STATUS_NOT_SUPPORTED;
 696         }
 697
 698         sysupgrade_exec_upgraded(blobmsg_get_string(tb[SYSUPGRADE_PREFIX]),
 699                                  blobmsg_get_string(tb[SYSUPGRADE_PATH]),
 700                                  tb[SYSUPGRADE_BACKUP] ? blobmsg_get_string(tb[SYSUPGRADE_BACKUP]) : NULL,
 701                                  tb[SYSUPGRADE_COMMAND] ? blobmsg_get_string(tb[SYSUPGRADE_COMMAND]) : NULL,
 702                                  tb[SYSUPGRADE_OPTIONS]);
 703
 704         /* sysupgrade_exec_upgraded() will never return unless something has gone wrong */
 705         return UBUS_STATUS_UNKNOWN_ERROR;
 706 }
 707
 708 static void
 709 procd_subscribe_cb(struct ubus_context *ctx, struct ubus_object *obj)
 710 {
 711         notify = obj->has_subscribers;
 712 }
 713
 714
 715 static const struct ubus_method system_methods[] = {
 716         UBUS_METHOD_NOARG("board", system_board),
 717         UBUS_METHOD_NOARG("info",  system_info),
 718         UBUS_METHOD_NOARG("reboot", system_reboot),
 719         UBUS_METHOD("watchdog", watchdog_set, watchdog_policy),
 720         UBUS_METHOD("signal", proc_signal, signal_policy),
 721         UBUS_METHOD("validate_firmware_image", validate_firmware_image, validate_firmware_image_policy),
 722         UBUS_METHOD("sysupgrade", sysupgrade, sysupgrade_policy),
 723 };
 724
 725 static struct ubus_object_type system_object_type =
 726         UBUS_OBJECT_TYPE("system", system_methods);
 727
 728 static struct ubus_object system_object = {
 729         .name = "system",
 730         .type = &system_object_type,
 731         .methods = system_methods,
 732         .n_methods = ARRAY_SIZE(system_methods),
 733         .subscribe_cb = procd_subscribe_cb,
 734 };
 735
 736 void
 737 procd_bcast_event(char *event, struct blob_attr *msg)
 738 {
 739         int ret;
 740
 741         if (!notify)
 742                 return;
 743
 744         ret = ubus_notify(_ctx, &system_object, event, msg, -1);
 745         if (ret)
 746                 fprintf(stderr, "Failed to notify log: %s\n", ubus_strerror(ret));
 747 }
 748
 749 void ubus_init_system(struct ubus_context *ctx)
 750 {
 751         int ret;
 752
 753         _ctx = ctx;
 754         ret = ubus_add_object(ctx, &system_object);
 755         if (ret)
 756                 ERROR("Failed to add object: %s\n", ubus_strerror(ret));
 757 }