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