forked from vergoh/vnstat
-
Notifications
You must be signed in to change notification settings - Fork 0
/
vnstatd.c
374 lines (322 loc) · 11.2 KB
/
vnstatd.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
/*
vnStat daemon - Copyright (C) 2008-2022 Teemu Toivola <tst@iki.fi>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 dated June, 1991.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "common.h"
#include "datacache.h"
#include "dbsql.h"
#include "cfg.h"
#include "ibw.h"
#include "id.h"
#include "misc.h"
#include "daemon.h"
#include "vnstatd.h"
int main(int argc, char *argv[])
{
int currentarg;
uint32_t previflisthash;
uint64_t temp;
DSTATE s;
initdstate(&s);
/* early check for debug and config parameter */
if (argc > 1) {
for (currentarg = 1; currentarg < argc; currentarg++) {
if ((strcmp(argv[currentarg], "-D") == 0) || (strcmp(argv[currentarg], "--debug") == 0)) {
debug = 1;
printf("Debug enabled, vnstatd %s\n", VERSION);
} else if (strcmp(argv[currentarg], "--config") == 0) {
if (currentarg + 1 < argc) {
strncpy_nt(s.cfgfile, argv[currentarg + 1], 512);
if (debug)
printf("Used config file: %s\n", s.cfgfile);
currentarg++;
} else {
printf("Error: File for --config missing.\n");
return 1;
}
}
}
}
timeused_debug("daemon_startup", 1);
/* load config if available */
if (!loadcfg(s.cfgfile, CT_Daemon)) {
return 1;
}
if (!ibwloadcfg(s.cfgfile)) {
return 1;
}
/* init config settings */
strncpy_nt(s.user, cfg.daemonuser, 33);
strncpy_nt(s.group, cfg.daemongroup, 33);
s.updateinterval = cfg.updateinterval;
s.saveinterval = cfg.saveinterval * 60;
parseargs(&s, argc, argv);
preparedirs(&s);
/* set user and/or group if requested */
setgroup(s.group);
setuser(s.user);
if (!db_open_rw(1)) {
printf("Error: Failed to open database \"%s/%s\" in read/write mode.\n", cfg.dbdir, DATABASEFILE);
printf("Exiting...\n");
exit(EXIT_FAILURE);
}
if (s.initdb) {
db_close();
if (debug) {
printf("--initdb complete, exiting...\n");
}
exit(EXIT_SUCCESS);
}
detectboot(&s);
preparedatabase(&s);
if (!db_removeoldentries()) {
printf("Error: Database \"%s/%s\" cleanup failed: %s\n", cfg.dbdir, DATABASEFILE, strerror(errno));
printf("Exiting...\n");
exit(EXIT_FAILURE);
}
setsignaltraps();
/* start as daemon if requested, debug can't be enabled at the same time */
if (s.rundaemon && !debug) {
if (!db_close()) {
printf("Error: Failed to close database \"%s/%s\" before starting daemon: %s\n", cfg.dbdir, DATABASEFILE, strerror(errno));
printf("Exiting...\n");
exit(EXIT_FAILURE);
}
noexit++;
daemonize();
if (!db_open_rw(0)) {
snprintf(errorstring, 1024, "Failed to reopen database \"%s/%s\": %s", cfg.dbdir, DATABASEFILE, strerror(errno));
printe(PT_Error);
exit(EXIT_FAILURE);
}
}
timeused_debug("daemon_startup", 0);
s.running = 1;
#if defined(__linux__) && HAVE_LINUX_RTNETLINK_H
#if HAVE_DECL_IFLA_STATS64
snprintf(errorstring, 1024, "vnStat daemon %s started. (pid:%d uid:%d gid:%d 64-bit)", getversion(), (int)getpid(), (int)getuid(), (int)getgid());
#else
snprintf(errorstring, 1024, "vnStat daemon %s started. (pid:%d uid:%d gid:%d 32-bit)", getversion(), (int)getpid(), (int)getuid(), (int)getgid());
#endif
#else
snprintf(errorstring, 1024, "vnStat daemon %s started. (pid:%d uid:%d gid:%d)", getversion(), (int)getpid(), (int)getuid(), (int)getgid());
#endif
printe(PT_Info);
#if !HAVE_DECL_SQLITE_CHECKPOINT_RESTART
if (cfg.waldb) {
snprintf(errorstring, 1024, "DatabaseWriteAheadLogging is enabled but used libsqlite3 does not support it");
printe(PT_Warning);
}
#endif
/* warmup */
if (s.dbifcount == 0) {
filldatabaselist(&s);
s.prevdbsave = 0;
}
while (s.running && s.dbifcount && waittimesync(&s)) {
if (intsignal) {
handleintsignals(&s);
} else {
sleep(5);
}
}
/* main loop */
while (s.running) {
s.current = time(NULL);
/* track interface status only if at least one database exists */
if (s.dbifcount != 0) {
previflisthash = s.iflisthash;
interfacechangecheck(&s);
if (cfg.alwaysadd && s.iflisthash != previflisthash && previflisthash != 0) {
temp = s.dbifcount;
s.dbifcount += addinterfaces(&s);
if (temp != s.dbifcount) {
datacache_status(&s.dcache);
}
}
}
/* do update only if enough time has passed since the previous update */
if ((s.current - s.prevdbupdate) >= s.updateinterval) {
s.updateinterval = cfg.updateinterval;
if (debug) {
debugtimestamp();
datacache_debug(&s.dcache);
ibwlist();
}
/* fill database list if cache is empty */
if (s.dbifcount == 0) {
filldatabaselist(&s);
/* update data cache */
} else {
s.prevdbupdate = s.current - (s.current % s.updateinterval);
adjustsaveinterval(&s);
checkdbsaveneed(&s);
processdatacache(&s);
#if HAVE_DECL_SQLITE_CHECKPOINT_RESTART
if (cfg.waldb && (s.current - s.prevwaldbcheckpoint) >= WALDBCHECKPOINTINTERVALMINS * 60) {
db_walcheckpoint();
s.prevwaldbcheckpoint = s.current;
}
#endif
if (debug) {
printf("\n");
}
}
}
if (s.running && intsignal == 0) {
sleep((unsigned int)(cfg.pollinterval - (time(NULL) % cfg.pollinterval)));
}
if (intsignal) {
handleintsignals(&s);
}
}
flushcachetodisk(&s);
db_close();
datacache_clear(&s.dcache);
ibwflush();
if (s.rundaemon && !debug) {
close(pidfile);
unlink(cfg.pidfile);
}
return 0;
}
void showhelp(void)
{
printf("vnStat daemon %s by Teemu Toivola <tst at iki dot fi>\n\n", getversion());
printf(" -d, --daemon fork process to background\n");
printf(" -n, --nodaemon stay in foreground attached to the terminal\n\n");
printf(" -s, --sync sync interface counters on first update\n");
printf(" -D, --debug show additional debug and disable daemon\n");
printf(" -?, --help show this help\n");
printf(" -v, --version show version\n");
printf(" -p, --pidfile <file> select used pid file\n");
printf(" -u, --user <user> set daemon process user\n");
printf(" -g, --group <group> set daemon process group\n");
printf(" -t, --timestamp add timestamp to prints when running in foreground\n");
printf(" --config <config file> select used config file\n");
printf(" --noadd prevent startup if database has no interfaces\n");
printf(" --alwaysadd [mode] automatically start monitoring all new interfaces\n");
printf(" --initdb create empty database and exit\n\n");
printf("See also \"man vnstatd\".\n");
}
void parseargs(DSTATE *s, int argc, char **argv)
{
int currentarg, pidfiledefined = 0;
/* parse parameters, maybe not the best way but... */
for (currentarg = 1; currentarg < argc; currentarg++) {
if (debug)
printf("arg %d: \"%s\"\n", currentarg, argv[currentarg]);
if ((strcmp(argv[currentarg], "-?") == 0) || (strcmp(argv[currentarg], "--help") == 0)) {
break;
} else if (strcmp(argv[currentarg], "--config") == 0) {
/* config has already been parsed earlier so nothing to do here */
currentarg++;
} else if ((strcmp(argv[currentarg], "-D") == 0) || (strcmp(argv[currentarg], "--debug") == 0)) {
debug = 1;
} else if ((strcmp(argv[currentarg], "-d") == 0) || (strcmp(argv[currentarg], "--daemon") == 0)) {
s->rundaemon = 1;
s->showhelp = 0;
} else if ((strcmp(argv[currentarg], "-n") == 0) || (strcmp(argv[currentarg], "--nodaemon") == 0)) {
s->showhelp = 0;
} else if ((strcmp(argv[currentarg], "-s") == 0) || (strcmp(argv[currentarg], "--sync") == 0)) {
s->sync = 1;
} else if ((strcmp(argv[currentarg], "-t") == 0) || (strcmp(argv[currentarg], "--timestamp") == 0)) {
cfg.timestampprints = 1;
} else if ((strcmp(argv[currentarg], "-u") == 0) || (strcmp(argv[currentarg], "--user") == 0)) {
if (currentarg + 1 < argc) {
strncpy_nt(s->user, argv[currentarg + 1], 33);
if (debug)
printf("Requested user: \"%s\"\n", s->user);
currentarg++;
} else {
printf("Error: User for --user missing.\n");
exit(EXIT_FAILURE);
}
} else if ((strcmp(argv[currentarg], "-g") == 0) || (strcmp(argv[currentarg], "--group") == 0)) {
if (currentarg + 1 < argc) {
strncpy_nt(s->group, argv[currentarg + 1], 33);
if (debug)
printf("Requested group: \"%s\"\n", s->group);
currentarg++;
} else {
printf("Error: Group for --group missing.\n");
exit(EXIT_FAILURE);
}
} else if (strcmp(argv[currentarg], "--noadd") == 0) {
s->noadd = 1;
} else if (strcmp(argv[currentarg], "--alwaysadd") == 0) {
if (currentarg + 1 < argc && (strlen(argv[currentarg + 1]) == 1 || ishelprequest(argv[currentarg + 1]))) {
if (!isdigit(argv[currentarg + 1][0]) || atoi(argv[currentarg + 1]) > 1 || atoi(argv[currentarg + 1]) < 0) {
if (!ishelprequest(argv[currentarg + 1]))
printf("Error: Invalid mode parameter \"%s\".\n", argv[currentarg + 1]);
printf(" Valid parameters for %s:\n", argv[currentarg]);
printf(" 0 - disabled");
if (!cfg.alwaysadd) {
printf(" (default)");
}
printf("\n 1 - enabled");
if (cfg.alwaysadd) {
printf(" (default)");
}
printf("\n No mode parameter results in feature being enabled.\n");
exit(EXIT_FAILURE);
}
cfg.alwaysadd = atoi(argv[currentarg + 1]);
currentarg++;
} else {
cfg.alwaysadd = 1;
}
} else if (strcmp(argv[currentarg], "--initdb") == 0) {
s->initdb = 1;
s->showhelp = 0;
} else if ((strcmp(argv[currentarg], "-v") == 0) || (strcmp(argv[currentarg], "--version") == 0)) {
printf("vnStat daemon %s by Teemu Toivola <tst at iki dot fi>\n", getversion());
exit(EXIT_SUCCESS);
} else if ((strcmp(argv[currentarg], "-p") == 0) || (strcmp(argv[currentarg], "--pidfile") == 0)) {
if (currentarg + 1 < argc) {
strncpy_nt(cfg.pidfile, argv[currentarg + 1], 512);
cfg.pidfile[511] = '\0';
if (debug)
printf("Used pid file: %s\n", cfg.pidfile);
currentarg++;
pidfiledefined = 1;
} else {
printf("Error: File for --pidfile missing.\n");
exit(EXIT_FAILURE);
}
} else {
printf("Unknown arg \"%s\". Use --help for help.\n", argv[currentarg]);
exit(EXIT_FAILURE);
}
}
if (s->noadd && cfg.alwaysadd) {
printf("Warning: --noadd and --alwaysadd can't both be enabled at the same time. --alwaysadd has been disabled.\n");
cfg.alwaysadd = 0;
}
if (s->rundaemon && debug) {
printf("Error: --daemon and --debug can't both be used at the same time.\n");
exit(EXIT_FAILURE);
}
if (s->rundaemon && s->initdb) {
printf("Error: --daemon and --initdb can't both be used at the same time.\n");
exit(EXIT_FAILURE);
}
/* show help if nothing else was asked to be done */
if (s->showhelp) {
showhelp();
exit(EXIT_SUCCESS);
}
if (!s->rundaemon && pidfiledefined) {
printf("Error: --pidfile can only be used together with --daemon\n");
exit(EXIT_FAILURE);
}
}