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 <libubox/uloop.h>
  29
  30 #include "procd.h"
  31 #include "sysupgrade.h"
  32 #include "watchdog.h"
  33
  34 static struct blob_buf b;
  35 static int notify;
  36 static struct ubus_context *_ctx;
  37
  38 static int system_board(struct ubus_context *ctx, struct ubus_object *obj,
  39                  struct ubus_request_data *req, const char *method,
  40                  struct blob_attr *msg)
  41 {
  42         void *c;
  43         char line[256];
  44         char *key, *val, *next;
  45         struct utsname utsname;
  46         FILE *f;
  47
  48         blob_buf_init(&b, 0);
  49
  50         if (uname(&utsname) >= 0)
  51         {
  52                 blobmsg_add_string(&b, "kernel", utsname.release);
  53                 blobmsg_add_string(&b, "hostname", utsname.nodename);
  54         }
  55
  56         if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
  57         {
  58                 while(fgets(line, sizeof(line), f))
  59                 {
  60                         key = strtok(line, "\t:");
  61                         val = strtok(NULL, "\t\n");
  62
  63                         if (!key || !val)
  64                                 continue;
  65
  66                         if (!strcasecmp(key, "system type") ||
  67                             !strcasecmp(key, "processor") ||
  68                             !strcasecmp(key, "cpu") ||
  69                             !strcasecmp(key, "model name"))
  70                         {
  71                                 strtoul(val + 2, &key, 0);
  72
  73                                 if (key == (val + 2) || *key != 0)
  74                                 {
  75                                         blobmsg_add_string(&b, "system", val + 2);
  76                                         break;
  77                                 }
  78                         }
  79                 }
  80
  81                 fclose(f);
  82         }
  83
  84         if ((f = fopen("/tmp/sysinfo/model", "r")) != NULL ||
  85             (f = fopen("/proc/device-tree/model", "r")) != NULL)
  86         {
  87                 if (fgets(line, sizeof(line), f))
  88                 {
  89                         val = strtok(line, "\t\n");
  90
  91                         if (val)
  92                                 blobmsg_add_string(&b, "model", val);
  93                 }
  94
  95                 fclose(f);
  96         }
  97         else if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
  98         {
  99                 while(fgets(line, sizeof(line), f))
 100                 {
 101                         key = strtok(line, "\t:");
 102                         val = strtok(NULL, "\t\n");
 103
 104                         if (!key || !val)
 105                                 continue;
 106
 107                         if (!strcasecmp(key, "machine") ||
 108                             !strcasecmp(key, "hardware"))
 109                         {
 110                                 blobmsg_add_string(&b, "model", val + 2);
 111                                 break;
 112                         }
 113                 }
 114
 115                 fclose(f);
 116         }
 117
 118         if ((f = fopen("/tmp/sysinfo/board_name", "r")) != NULL)
 119         {
 120                 if (fgets(line, sizeof(line), f))
 121                 {
 122                         val = strtok(line, "\t\n");
 123
 124                         if (val)
 125                                 blobmsg_add_string(&b, "board_name", val);
 126                 }
 127
 128                 fclose(f);
 129         }
 130         else if ((f = fopen("/proc/device-tree/compatible", "r")) != NULL)
 131         {
 132                 if (fgets(line, sizeof(line), f))
 133                 {
 134                         val = strtok(line, "\t\n");
 135
 136                         if (val)
 137                         {
 138                                 next = val;
 139                                 while ((next = strchr(next, ',')) != NULL)
 140                                 {
 141                                         *next = '-';
 142                                         next++;
 143                                 }
 144
 145                                 blobmsg_add_string(&b, "board_name", val);
 146                         }
 147                 }
 148
 149                 fclose(f);
 150         }
 151
 152         if ((f = fopen("/etc/openwrt_release", "r")) != NULL)
 153         {
 154                 c = blobmsg_open_table(&b, "release");
 155
 156                 while (fgets(line, sizeof(line), f))
 157                 {
 158                         char *dest;
 159                         char ch;
 160
 161                         key = line;
 162                         val = strchr(line, '=');
 163                         if (!val)
 164                                 continue;
 165
 166                         *(val++) = 0;
 167
 168                         if (!strcasecmp(key, "DISTRIB_ID"))
 169                                 key = "distribution";
 170                         else if (!strcasecmp(key, "DISTRIB_RELEASE"))
 171                                 key = "version";
 172                         else if (!strcasecmp(key, "DISTRIB_REVISION"))
 173                                 key = "revision";
 174                         else if (!strcasecmp(key, "DISTRIB_CODENAME"))
 175                                 key = "codename";
 176                         else if (!strcasecmp(key, "DISTRIB_TARGET"))
 177                                 key = "target";
 178                         else if (!strcasecmp(key, "DISTRIB_DESCRIPTION"))
 179                                 key = "description";
 180                         else
 181                                 continue;
 182
 183                         dest = blobmsg_alloc_string_buffer(&b, key, strlen(val));
 184                         if (!dest) {
 185                                 ERROR("Failed to allocate blob.\n");
 186                                 continue;
 187                         }
 188
 189                         while (val && (ch = *(val++)) != 0) {
 190                                 switch (ch) {
 191                                 case '\'':
 192                                 case '"':
 193                                         next = strchr(val, ch);
 194                                         if (next)
 195                                                 *next = 0;
 196
 197                                         strcpy(dest, val);
 198
 199                                         if (next)
 200                                                 val = next + 1;
 201
 202                                         dest += strlen(dest);
 203                                         break;
 204                                 case '\\':
 205                                         *(dest++) = *(val++);
 206                                         break;
 207                                 }
 208                         }
 209                         blobmsg_add_string_buffer(&b);
 210                 }
 211
 212                 blobmsg_close_array(&b, c);
 213
 214                 fclose(f);
 215         }
 216
 217         ubus_send_reply(ctx, req, b.head);
 218
 219         return UBUS_STATUS_OK;
 220 }
 221
 222 static int system_info(struct ubus_context *ctx, struct ubus_object *obj,
 223                 struct ubus_request_data *req, const char *method,
 224                 struct blob_attr *msg)
 225 {
 226         time_t now;
 227         struct tm *tm;
 228 #ifdef linux
 229         struct sysinfo info;
 230         void *c;
 231
 232         if (sysinfo(&info))
 233                 return UBUS_STATUS_UNKNOWN_ERROR;
 234 #endif
 235
 236         now = time(NULL);
 237
 238         if (!(tm = localtime(&now)))
 239                 return UBUS_STATUS_UNKNOWN_ERROR;
 240
 241         blob_buf_init(&b, 0);
 242
 243         blobmsg_add_u32(&b, "localtime", now + tm->tm_gmtoff);
 244
 245 #ifdef linux
 246         blobmsg_add_u32(&b, "uptime",    info.uptime);
 247
 248         c = blobmsg_open_array(&b, "load");
 249         blobmsg_add_u32(&b, NULL, info.loads[0]);
 250         blobmsg_add_u32(&b, NULL, info.loads[1]);
 251         blobmsg_add_u32(&b, NULL, info.loads[2]);
 252         blobmsg_close_array(&b, c);
 253
 254         c = blobmsg_open_table(&b, "memory");
 255         blobmsg_add_u64(&b, "total",    info.mem_unit * info.totalram);
 256         blobmsg_add_u64(&b, "free",     info.mem_unit * info.freeram);
 257         blobmsg_add_u64(&b, "shared",   info.mem_unit * info.sharedram);
 258         blobmsg_add_u64(&b, "buffered", info.mem_unit * info.bufferram);
 259         blobmsg_close_table(&b, c);
 260
 261         c = blobmsg_open_table(&b, "swap");
 262         blobmsg_add_u64(&b, "total",    info.mem_unit * info.totalswap);
 263         blobmsg_add_u64(&b, "free",     info.mem_unit * info.freeswap);
 264         blobmsg_close_table(&b, c);
 265 #endif
 266
 267         ubus_send_reply(ctx, req, b.head);
 268
 269         return UBUS_STATUS_OK;
 270 }
 271
 272 static int system_reboot(struct ubus_context *ctx, struct ubus_object *obj,
 273                          struct ubus_request_data *req, const char *method,
 274                          struct blob_attr *msg)
 275 {
 276         procd_shutdown(RB_AUTOBOOT);
 277         return 0;
 278 }
 279
 280 enum {
 281         WDT_FREQUENCY,
 282         WDT_TIMEOUT,
 283         WDT_MAGICCLOSE,
 284         WDT_STOP,
 285         __WDT_MAX
 286 };
 287
 288 static const struct blobmsg_policy watchdog_policy[__WDT_MAX] = {
 289         [WDT_FREQUENCY] = { .name = "frequency", .type = BLOBMSG_TYPE_INT32 },
 290         [WDT_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
 291         [WDT_MAGICCLOSE] = { .name = "magicclose", .type = BLOBMSG_TYPE_BOOL },
 292         [WDT_STOP] = { .name = "stop", .type = BLOBMSG_TYPE_BOOL },
 293 };
 294
 295 static int watchdog_set(struct ubus_context *ctx, struct ubus_object *obj,
 296                         struct ubus_request_data *req, const char *method,
 297                         struct blob_attr *msg)
 298 {
 299         struct blob_attr *tb[__WDT_MAX];
 300         const char *status;
 301
 302         if (!msg)
 303                 return UBUS_STATUS_INVALID_ARGUMENT;
 304
 305         blobmsg_parse(watchdog_policy, __WDT_MAX, tb, blob_data(msg), blob_len(msg));
 306         if (tb[WDT_FREQUENCY]) {
 307                 unsigned int timeout = tb[WDT_TIMEOUT] ? blobmsg_get_u32(tb[WDT_TIMEOUT]) :
 308                                                 watchdog_timeout(0);
 309                 unsigned int freq = blobmsg_get_u32(tb[WDT_FREQUENCY]);
 310
 311                 if (freq) {
 312                         if (freq > timeout / 2)
 313                                 freq = timeout / 2;
 314                         watchdog_frequency(freq);
 315                 }
 316         }
 317
 318         if (tb[WDT_TIMEOUT]) {
 319                 unsigned int timeout = blobmsg_get_u32(tb[WDT_TIMEOUT]);
 320                 unsigned int frequency = watchdog_frequency(0);
 321
 322                 if (timeout <= frequency)
 323                         timeout = frequency * 2;
 324                  watchdog_timeout(timeout);
 325         }
 326
 327         if (tb[WDT_MAGICCLOSE])
 328                 watchdog_set_magicclose(blobmsg_get_bool(tb[WDT_MAGICCLOSE]));
 329
 330         if (tb[WDT_STOP])
 331                 watchdog_set_stopped(blobmsg_get_bool(tb[WDT_STOP]));
 332
 333         if (watchdog_fd() == NULL)
 334                 status = "offline";
 335         else if (watchdog_get_stopped())
 336                 status = "stopped";
 337         else
 338                 status = "running";
 339
 340         blob_buf_init(&b, 0);
 341         blobmsg_add_string(&b, "status", status);
 342         blobmsg_add_u32(&b, "timeout", watchdog_timeout(0));
 343         blobmsg_add_u32(&b, "frequency", watchdog_frequency(0));
 344         blobmsg_add_u8(&b, "magicclose", watchdog_get_magicclose());
 345         ubus_send_reply(ctx, req, b.head);
 346
 347         return 0;
 348 }
 349
 350 enum {
 351         SIGNAL_PID,
 352         SIGNAL_NUM,
 353         __SIGNAL_MAX
 354 };
 355
 356 static const struct blobmsg_policy signal_policy[__SIGNAL_MAX] = {
 357         [SIGNAL_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
 358         [SIGNAL_NUM] = { .name = "signum", .type = BLOBMSG_TYPE_INT32 },
 359 };
 360
 361 static int proc_signal(struct ubus_context *ctx, struct ubus_object *obj,
 362                         struct ubus_request_data *req, const char *method,
 363                         struct blob_attr *msg)
 364 {
 365         struct blob_attr *tb[__SIGNAL_MAX];
 366
 367         if (!msg)
 368                 return UBUS_STATUS_INVALID_ARGUMENT;
 369
 370         blobmsg_parse(signal_policy, __SIGNAL_MAX, tb, blob_data(msg), blob_len(msg));
 371         if (!tb[SIGNAL_PID || !tb[SIGNAL_NUM]])
 372                 return UBUS_STATUS_INVALID_ARGUMENT;
 373
 374         kill(blobmsg_get_u32(tb[SIGNAL_PID]), blobmsg_get_u32(tb[SIGNAL_NUM]));
 375
 376         return 0;
 377 }
 378
 379 enum {
 380         SYSUPGRADE_PATH,
 381         SYSUPGRADE_PREFIX,
 382         SYSUPGRADE_COMMAND,
 383         __SYSUPGRADE_MAX
 384 };
 385
 386 static const struct blobmsg_policy sysupgrade_policy[__SYSUPGRADE_MAX] = {
 387         [SYSUPGRADE_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
 388         [SYSUPGRADE_PREFIX] = { .name = "prefix", .type = BLOBMSG_TYPE_STRING },
 389         [SYSUPGRADE_COMMAND] = { .name = "command", .type = BLOBMSG_TYPE_STRING },
 390 };
 391
 392 static int sysupgrade(struct ubus_context *ctx, struct ubus_object *obj,
 393                       struct ubus_request_data *req, const char *method,
 394                       struct blob_attr *msg)
 395 {
 396         struct blob_attr *tb[__SYSUPGRADE_MAX];
 397
 398         if (!msg)
 399                 return UBUS_STATUS_INVALID_ARGUMENT;
 400
 401         blobmsg_parse(sysupgrade_policy, __SYSUPGRADE_MAX, tb, blob_data(msg), blob_len(msg));
 402         if (!tb[SYSUPGRADE_PATH] || !tb[SYSUPGRADE_PREFIX])
 403                 return UBUS_STATUS_INVALID_ARGUMENT;
 404
 405         sysupgrade_exec_upgraded(blobmsg_get_string(tb[SYSUPGRADE_PREFIX]),
 406                                  blobmsg_get_string(tb[SYSUPGRADE_PATH]),
 407                                  tb[SYSUPGRADE_COMMAND] ? blobmsg_get_string(tb[SYSUPGRADE_COMMAND]) : NULL);
 408
 409         /* sysupgrade_exec_upgraded() will never return unless something has gone wrong */
 410         return UBUS_STATUS_UNKNOWN_ERROR;
 411 }
 412
 413 static void
 414 procd_subscribe_cb(struct ubus_context *ctx, struct ubus_object *obj)
 415 {
 416         notify = obj->has_subscribers;
 417 }
 418
 419
 420 static const struct ubus_method system_methods[] = {
 421         UBUS_METHOD_NOARG("board", system_board),
 422         UBUS_METHOD_NOARG("info",  system_info),
 423         UBUS_METHOD_NOARG("reboot", system_reboot),
 424         UBUS_METHOD("watchdog", watchdog_set, watchdog_policy),
 425         UBUS_METHOD("signal", proc_signal, signal_policy),
 426         UBUS_METHOD("sysupgrade", sysupgrade, sysupgrade_policy),
 427 };
 428
 429 static struct ubus_object_type system_object_type =
 430         UBUS_OBJECT_TYPE("system", system_methods);
 431
 432 static struct ubus_object system_object = {
 433         .name = "system",
 434         .type = &system_object_type,
 435         .methods = system_methods,
 436         .n_methods = ARRAY_SIZE(system_methods),
 437         .subscribe_cb = procd_subscribe_cb,
 438 };
 439
 440 void
 441 procd_bcast_event(char *event, struct blob_attr *msg)
 442 {
 443         int ret;
 444
 445         if (!notify)
 446                 return;
 447
 448         ret = ubus_notify(_ctx, &system_object, event, msg, -1);
 449         if (ret)
 450                 fprintf(stderr, "Failed to notify log: %s\n", ubus_strerror(ret));
 451 }
 452
 453 void ubus_init_system(struct ubus_context *ctx)
 454 {
 455         int ret;
 456
 457         _ctx = ctx;
 458         ret = ubus_add_object(ctx, &system_object);
 459         if (ret)
 460                 ERROR("Failed to add object: %s\n", ubus_strerror(ret));
 461 }