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