only build upgraded on mips
[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 #include <sys/sysinfo.h>
17 #include <sys/ioctl.h>
18 #include <sys/types.h>
19 #include <sys/stat.h>
20 #include <fcntl.h>
21 #include <signal.h>
22 #include <unistd.h>
23
24 #include <libubox/uloop.h>
25
26 #include "procd.h"
27 #include "watchdog.h"
28
29 static struct blob_buf b;
30 static int notify;
31 static struct ubus_context *_ctx;
32
33 int upgrade_running = 0;
34
35 static int system_board(struct ubus_context *ctx, struct ubus_object *obj,
36                  struct ubus_request_data *req, const char *method,
37                  struct blob_attr *msg)
38 {
39         void *c;
40         char line[256];
41         char *key, *val;
42         struct utsname utsname;
43         FILE *f;
44
45         blob_buf_init(&b, 0);
46
47         if (uname(&utsname) >= 0)
48         {
49                 blobmsg_add_string(&b, "kernel", utsname.release);
50                 blobmsg_add_string(&b, "hostname", utsname.nodename);
51         }
52
53         if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
54         {
55                 while(fgets(line, sizeof(line), f))
56                 {
57                         key = strtok(line, "\t:");
58                         val = strtok(NULL, "\t\n");
59
60                         if (!key || !val)
61                                 continue;
62
63                         if (!strcasecmp(key, "system type") ||
64                             !strcasecmp(key, "processor") ||
65                             !strcasecmp(key, "model name"))
66                         {
67                                 blobmsg_add_string(&b, "system", val + 2);
68                                 break;
69                         }
70                 }
71
72                 fclose(f);
73         }
74
75         if ((f = fopen("/tmp/sysinfo/model", "r")) != NULL)
76         {
77                 if (fgets(line, sizeof(line), f))
78                 {
79                         val = strtok(line, "\t\n");
80
81                         if (val)
82                                 blobmsg_add_string(&b, "model", val);
83                 }
84
85                 fclose(f);
86         }
87         else if ((f = fopen("/proc/cpuinfo", "r")) != NULL)
88         {
89                 while(fgets(line, sizeof(line), f))
90                 {
91                         key = strtok(line, "\t:");
92                         val = strtok(NULL, "\t\n");
93
94                         if (!key || !val)
95                                 continue;
96
97                         if (!strcasecmp(key, "machine") ||
98                             !strcasecmp(key, "hardware"))
99                         {
100                                 blobmsg_add_string(&b, "model", val + 2);
101                                 break;
102                         }
103                 }
104
105                 fclose(f);
106         }
107
108         if ((f = fopen("/etc/openwrt_release", "r")) != NULL)
109         {
110                 c = blobmsg_open_table(&b, "release");
111
112                 while (fgets(line, sizeof(line), f))
113                 {
114                         key = strtok(line, "=\"");
115                         val = strtok(NULL, "\"\n");
116
117                         if (!key || !val)
118                                 continue;
119
120                         if (!strcasecmp(key, "DISTRIB_ID"))
121                                 blobmsg_add_string(&b, "distribution", val);
122                         else if (!strcasecmp(key, "DISTRIB_RELEASE"))
123                                 blobmsg_add_string(&b, "version", val);
124                         else if (!strcasecmp(key, "DISTRIB_REVISION"))
125                                 blobmsg_add_string(&b, "revision", val);
126                         else if (!strcasecmp(key, "DISTRIB_CODENAME"))
127                                 blobmsg_add_string(&b, "codename", val);
128                         else if (!strcasecmp(key, "DISTRIB_TARGET"))
129                                 blobmsg_add_string(&b, "target", val);
130                         else if (!strcasecmp(key, "DISTRIB_DESCRIPTION"))
131                                 blobmsg_add_string(&b, "description", val);
132                 }
133
134                 blobmsg_close_array(&b, c);
135
136                 fclose(f);
137         }
138
139         ubus_send_reply(ctx, req, b.head);
140
141         return UBUS_STATUS_OK;
142 }
143
144 static int system_info(struct ubus_context *ctx, struct ubus_object *obj,
145                 struct ubus_request_data *req, const char *method,
146                 struct blob_attr *msg)
147 {
148         void *c;
149         time_t now;
150         struct tm *tm;
151         struct sysinfo info;
152
153         now = time(NULL);
154
155         if (!(tm = localtime(&now)))
156                 return UBUS_STATUS_UNKNOWN_ERROR;
157
158         if (sysinfo(&info))
159                 return UBUS_STATUS_UNKNOWN_ERROR;
160
161         blob_buf_init(&b, 0);
162
163         blobmsg_add_u32(&b, "uptime",    info.uptime);
164         blobmsg_add_u32(&b, "localtime", mktime(tm));
165
166         c = blobmsg_open_array(&b, "load");
167         blobmsg_add_u32(&b, NULL, info.loads[0]);
168         blobmsg_add_u32(&b, NULL, info.loads[1]);
169         blobmsg_add_u32(&b, NULL, info.loads[2]);
170         blobmsg_close_array(&b, c);
171
172         c = blobmsg_open_table(&b, "memory");
173         blobmsg_add_u32(&b, "total",    info.mem_unit * info.totalram);
174         blobmsg_add_u32(&b, "free",     info.mem_unit * info.freeram);
175         blobmsg_add_u32(&b, "shared",   info.mem_unit * info.sharedram);
176         blobmsg_add_u32(&b, "buffered", info.mem_unit * info.bufferram);
177         blobmsg_close_table(&b, c);
178
179         c = blobmsg_open_table(&b, "swap");
180         blobmsg_add_u32(&b, "total",    info.mem_unit * info.totalswap);
181         blobmsg_add_u32(&b, "free",     info.mem_unit * info.freeswap);
182         blobmsg_close_table(&b, c);
183
184         ubus_send_reply(ctx, req, b.head);
185
186         return UBUS_STATUS_OK;
187 }
188
189 static int system_upgrade(struct ubus_context *ctx, struct ubus_object *obj,
190                         struct ubus_request_data *req, const char *method,
191                         struct blob_attr *msg)
192 {
193         upgrade_running = 1;
194         return 0;
195 }
196
197 enum {
198         WDT_FREQUENCY,
199         WDT_TIMEOUT,
200         WDT_STOP,
201         __WDT_MAX
202 };
203
204 static const struct blobmsg_policy watchdog_policy[__WDT_MAX] = {
205         [WDT_FREQUENCY] = { .name = "frequency", .type = BLOBMSG_TYPE_INT32 },
206         [WDT_TIMEOUT] = { .name = "timeout", .type = BLOBMSG_TYPE_INT32 },
207         [WDT_STOP] = { .name = "stop", .type = BLOBMSG_TYPE_BOOL },
208 };
209
210 static int watchdog_set(struct ubus_context *ctx, struct ubus_object *obj,
211                         struct ubus_request_data *req, const char *method,
212                         struct blob_attr *msg)
213 {
214         struct blob_attr *tb[__WDT_MAX];
215         const char *status;
216
217         if (!msg)
218                 return UBUS_STATUS_INVALID_ARGUMENT;
219
220         blobmsg_parse(watchdog_policy, __WDT_MAX, tb, blob_data(msg), blob_len(msg));
221         if (tb[WDT_FREQUENCY]) {
222                 unsigned int timeout = watchdog_timeout(0);
223                 unsigned int freq = blobmsg_get_u32(tb[WDT_FREQUENCY]);
224
225                 if (freq) {
226                         if (freq > timeout / 2)
227                                 freq = timeout / 2;
228                         watchdog_frequency(freq);
229                 }
230         }
231
232         if (tb[WDT_TIMEOUT]) {
233                 unsigned int timeout = blobmsg_get_u32(tb[WDT_TIMEOUT]);
234                 unsigned int frequency = watchdog_frequency(0);
235
236                 if (timeout <= frequency)
237                         timeout = frequency * 2;
238                  watchdog_timeout(timeout);
239         }
240
241         if (tb[WDT_STOP])
242                 watchdog_set_stopped(blobmsg_get_bool(tb[WDT_STOP]));
243
244         if (watchdog_fd() < 0)
245                 status = "offline";
246         else if (watchdog_get_stopped())
247                 status = "stopped";
248         else
249                 status = "running";
250
251         blob_buf_init(&b, 0);
252         blobmsg_add_string(&b, "status", status);
253         blobmsg_add_u32(&b, "timeout", watchdog_timeout(0));
254         blobmsg_add_u32(&b, "frequency", watchdog_frequency(0));
255         ubus_send_reply(ctx, req, b.head);
256
257         return 0;
258 }
259
260 enum {
261         SIGNAL_PID,
262         SIGNAL_NUM,
263         __SIGNAL_MAX
264 };
265
266 static const struct blobmsg_policy signal_policy[__SIGNAL_MAX] = {
267         [SIGNAL_PID] = { .name = "pid", .type = BLOBMSG_TYPE_INT32 },
268         [SIGNAL_NUM] = { .name = "signum", .type = BLOBMSG_TYPE_INT32 },
269 };
270
271 static int proc_signal(struct ubus_context *ctx, struct ubus_object *obj,
272                         struct ubus_request_data *req, const char *method,
273                         struct blob_attr *msg)
274 {
275         struct blob_attr *tb[__SIGNAL_MAX];
276
277         if (!msg)
278                 return UBUS_STATUS_INVALID_ARGUMENT;
279
280         blobmsg_parse(signal_policy, __SIGNAL_MAX, tb, blob_data(msg), blob_len(msg));
281         if (!tb[SIGNAL_PID || !tb[SIGNAL_NUM]])
282                 return UBUS_STATUS_INVALID_ARGUMENT;
283
284         kill(blobmsg_get_u32(tb[SIGNAL_PID]), blobmsg_get_u32(tb[SIGNAL_NUM]));
285
286         return 0;
287 }
288
289 enum {
290         NAND_PATH,
291         __NAND_MAX
292 };
293
294 static const struct blobmsg_policy nand_policy[__NAND_MAX] = {
295         [NAND_PATH] = { .name = "path", .type = BLOBMSG_TYPE_STRING },
296 };
297
298 static void
299 procd_spawn_upgraded(char *path)
300 {
301         char *wdt_fd = watchdog_fd();
302         char *argv[] = { "/tmp/upgraded", NULL, NULL};
303
304         argv[1] = path;
305
306         DEBUG(2, "Exec to upgraded now\n");
307         if (wdt_fd) {
308                 watchdog_no_cloexec();
309                 setenv("WDTFD", wdt_fd, 1);
310         }
311         execvp(argv[0], argv);
312 }
313
314 static int nand_set(struct ubus_context *ctx, struct ubus_object *obj,
315                         struct ubus_request_data *req, const char *method,
316                         struct blob_attr *msg)
317 {
318         struct blob_attr *tb[__NAND_MAX];
319
320         if (!msg)
321                 return UBUS_STATUS_INVALID_ARGUMENT;
322
323         blobmsg_parse(nand_policy, __NAND_MAX, tb, blob_data(msg), blob_len(msg));
324         if (!tb[NAND_PATH])
325                 return UBUS_STATUS_INVALID_ARGUMENT;
326
327         procd_spawn_upgraded(blobmsg_get_string(tb[NAND_PATH]));
328         fprintf(stderr, "Yikees, something went wrong. no /sbin/upgraded ?\n");
329         return 0;
330 }
331
332 static void
333 procd_subscribe_cb(struct ubus_context *ctx, struct ubus_object *obj)
334 {
335         notify = obj->has_subscribers;
336 }
337
338
339 static const struct ubus_method system_methods[] = {
340         UBUS_METHOD_NOARG("board", system_board),
341         UBUS_METHOD_NOARG("info",  system_info),
342         UBUS_METHOD_NOARG("upgrade", system_upgrade),
343         UBUS_METHOD("watchdog", watchdog_set, watchdog_policy),
344         UBUS_METHOD("signal", proc_signal, signal_policy),
345
346         /* must remain at the end as it ia not always loaded */
347         UBUS_METHOD("nandupgrade", nand_set, nand_policy),
348 };
349
350 static struct ubus_object_type system_object_type =
351         UBUS_OBJECT_TYPE("system", system_methods);
352
353 static struct ubus_object system_object = {
354         .name = "system",
355         .type = &system_object_type,
356         .methods = system_methods,
357         .n_methods = ARRAY_SIZE(system_methods),
358         .subscribe_cb = procd_subscribe_cb,
359 };
360
361 void
362 procd_bcast_event(char *event, struct blob_attr *msg)
363 {
364         int ret;
365
366         if (!notify)
367                 return;
368
369         ret = ubus_notify(_ctx, &system_object, event, msg, -1);
370         if (ret)
371                 fprintf(stderr, "Failed to notify log: %s\n", ubus_strerror(ret));
372 }
373
374 void ubus_init_system(struct ubus_context *ctx)
375 {
376         struct stat s;
377         int ret;
378
379         if (stat("/sbin/upgraded", &s))
380                 system_object.n_methods -= 1;
381
382         _ctx = ctx;
383         ret = ubus_add_object(ctx, &system_object);
384         if (ret)
385                 ERROR("Failed to add object: %s\n", ubus_strerror(ret));
386 }