Mercurial > wflogs-daemon
annotate src/wflogs-config.cpp @ 4:37eace15ef87
allow hourly/daily/weekly triggers for output generation, append to temp wflogs input files so daemon restart won't drop as much data
| author | Carl Byington <carl@five-ten-sg.com> |
|---|---|
| date | Fri, 17 May 2013 12:03:21 -0700 |
| parents | 400b1de6e1c6 |
| children | a043b7d7269c |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 | |
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3 Copyright (c) 2013 Carl Byington - 510 Software Group, released under |
| 0 | 4 the GPL version 3 or any later version at your choice available at |
| 5 http://www.gnu.org/licenses/gpl-3.0.txt | |
| 6 | |
| 7 */ | |
| 8 | |
| 9 #include "includes.h" | |
| 10 #include <fcntl.h> | |
| 11 #include <sys/socket.h> | |
| 12 #include <netinet/in.h> | |
| 13 #include <arpa/inet.h> | |
| 14 #include <netdb.h> | |
| 15 #include <limits.h> | |
|
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16 #include <time.h> |
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17 |
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18 |
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19 string_set all_strings;// owns all the strings, only modified by the config loader thread |
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20 const int maxlen = 1000; // used for snprintf buffers |
| 0 | 21 |
| 22 const char *token_context; | |
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23 const char *token_daily; |
| 0 | 24 const char *token_file; |
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25 const char *token_hourly; |
| 0 | 26 const char *token_include; |
| 27 const char *token_lbrace; | |
| 28 const char *token_output; | |
| 29 const char *token_pattern; | |
| 30 const char *token_period; | |
| 31 const char *token_rbrace; | |
| 32 const char *token_semi; | |
| 33 const char *token_tempin; | |
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34 const char *token_trigger; |
| 0 | 35 const char *token_versions; |
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36 const char *token_weekly; |
| 0 | 37 const char *token_wflogs; |
| 38 | |
| 39 | |
| 40 //////////////////////////////////////////////// | |
| 41 // | |
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42 CONTEXT::CONTEXT(const char *nam) { |
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43 name = nam; |
| 0 | 44 fd = -1; |
| 45 len = 0; | |
| 46 fdo = -1; | |
| 47 period = 120; | |
| 48 versions = 3; | |
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49 trigger = NULL; |
| 0 | 50 output = NULL; |
| 51 tempin = NULL; | |
| 52 wflogs = NULL; | |
| 53 fn = NULL; | |
| 54 pattern = NULL; | |
| 55 } | |
| 56 | |
| 57 | |
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58 CONTEXT::~CONTEXT() { |
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59 free_all(); |
| 0 | 60 } |
| 61 | |
| 62 | |
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63 void CONTEXT::dump() { |
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64 printf("context %s {\n", name); |
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65 printf(" period %d; \n", period); |
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66 printf(" versions %d; \n", versions); |
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67 if (trigger) printf(" trigger \"%s\";\n", trigger); |
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68 printf(" output \"%s\";\n", output); |
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69 printf(" tempin \"%s\";\n", tempin); |
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70 printf(" wflogs \"%s\";\n", wflogs); |
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71 printf(" file \"%s\";\n", fn); |
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72 printf(" pattern \"%s\";\n", pattern); |
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73 printf("};\n\n"); |
| 0 | 74 } |
| 75 | |
| 76 | |
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77 void CONTEXT::openo(bool msg) { |
| 0 | 78 open_time = time(NULL); |
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79 localtime_r(&open_time, &open_tm); |
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80 fdo = ::open(tempin, O_CREAT | O_WRONLY, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); |
| 0 | 81 if (fdo == -1) { |
| 82 if (msg) { | |
| 83 char buf[maxlen]; | |
| 84 snprintf(buf, sizeof(buf), "wflogs tempin file %s not writeable", tempin); | |
| 85 tokp->token_error(buf); | |
| 86 } | |
| 87 } | |
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88 else { |
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89 lseek(fdo, 0, SEEK_END); |
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90 } |
| 0 | 91 } |
| 92 | |
| 93 | |
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94 void CONTEXT::open(bool msg) { |
| 0 | 95 fd = ::open(fn, O_RDONLY); |
| 96 len = 0; | |
| 97 if (fd == -1) { | |
| 98 if (msg) { | |
| 99 char buf[maxlen]; | |
| 100 snprintf(buf, sizeof(buf), "syslog file %s not readable", fn); | |
| 101 tokp->token_error(buf); | |
| 102 } | |
| 103 } | |
| 104 else { | |
| 105 if (debug_syslog > 1) { | |
| 106 snprintf(buf, sizeof(buf), "syslog file %s opened", fn); | |
| 107 my_syslog(buf); | |
| 108 } | |
| 109 if (msg) lseek(fd, 0, SEEK_END); | |
| 110 if (fstat(fd, &openfdstat)) { | |
| 111 close(); | |
| 112 snprintf(buf, sizeof(buf), "syslog file %s cannot stat after open", fn); | |
| 113 tokp->token_error(buf); | |
| 114 } | |
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115 // specify that this fd gets closed on exec, so that wflogs |
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116 // won't have access to it. |
| 0 | 117 int oldflags = fcntl(fd, F_GETFD, 0); |
| 118 if (oldflags >= 0) { | |
| 119 fcntl(fd, F_SETFD, oldflags | FD_CLOEXEC); | |
| 120 } | |
| 121 } | |
| 122 } | |
| 123 | |
| 124 | |
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125 bool CONTEXT::write(char *p) { |
| 0 | 126 // p points to \0 at end of buf, may be destroyed |
| 127 if (failedo()) { | |
| 128 openo(false); | |
| 129 if (failedo()) return false; | |
| 130 } | |
| 131 *p = '\n'; | |
| 132 ::write(fdo, buf, p-buf+1); | |
| 133 } | |
| 134 | |
| 135 | |
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136 bool CONTEXT::read() { |
| 0 | 137 if (failed()) { |
| 138 open(false); | |
| 139 if (failed()) return false; | |
| 140 } | |
| 141 int n = ::read(fd, buf+len, buflen-len); | |
| 142 bool have = (n > 0); | |
| 143 if (have) { | |
| 144 len += n; | |
| 145 while (true) { | |
| 146 char *p = (char*)memchr(buf, '\n', len); | |
| 147 if (!p) break; | |
| 148 n = p-buf; | |
| 149 *p = '\0'; | |
| 150 process(p); // process null terminated string, but may destroy the null | |
| 151 len -= n+1; | |
| 152 memmove(buf, p+1, len); | |
| 153 } | |
| 154 // no <lf> in a full buffer | |
| 155 if (len == buflen) len = 0; | |
| 156 } | |
| 157 else { | |
| 158 // check for file close | |
| 159 struct stat filenamest; | |
| 160 if (0 == stat(fn, &filenamest)) { | |
| 161 if ((filenamest.st_dev != openfdstat.st_dev) || | |
| 162 (filenamest.st_ino != openfdstat.st_ino)) { | |
| 163 close(); | |
| 164 } | |
| 165 } | |
| 166 else { | |
| 167 // filename no longer exists | |
| 168 close(); | |
| 169 } | |
| 170 } | |
| 171 check_wflog(); | |
| 172 return have; | |
| 173 } | |
| 174 | |
| 175 | |
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176 void CONTEXT::closeo() { |
| 0 | 177 if (fdo != -1) ::close(fdo); |
| 178 fdo = -1; | |
| 179 } | |
| 180 | |
| 181 | |
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182 void CONTEXT::close() { |
| 0 | 183 if (debug_syslog > 1) { |
| 184 snprintf(buf, sizeof(buf), "syslog file %s closed", fn); | |
| 185 my_syslog(buf); | |
| 186 } | |
| 187 if (fd != -1) ::close(fd); | |
| 188 fd = -1; | |
| 189 } | |
| 190 | |
| 191 | |
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192 void CONTEXT::process(char *p) { |
| 0 | 193 // p points to \0 at end of buf, may be destroyed |
| 194 if (pattern) { | |
| 195 if (0 == regexec(&re, buf, 0, NULL, 0)) { | |
| 196 if (debug_syslog > 2) { | |
| 197 my_syslog(buf); // show lines with matches | |
| 198 } | |
| 199 write(p); | |
| 200 } | |
| 201 } | |
| 202 } | |
| 203 | |
| 204 | |
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205 bool CONTEXT::check_wflog_time() { |
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206 time_t now_time = time(NULL); |
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207 tm now_tm; |
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208 localtime_r(&now_time, &now_tm); |
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209 return (open_time + period < now_time) || \ |
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210 ((trigger == token_hourly) && (now_tm.tm_hour != open_tm.tm_hour)) || \ |
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211 ((trigger == token_daily) && (now_tm.tm_wday != open_tm.tm_wday)) || \ |
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212 ((trigger == token_weekly) && (now_tm.tm_wday != open_tm.tm_wday) && (now_tm.tm_wday == 0)); |
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213 } |
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214 |
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215 |
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216 void CONTEXT::check_wflog() { |
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217 if ((fdo != -1) && check_wflog_time()) { |
| 0 | 218 closeo(); |
| 219 // rename previous wflog html output files | |
| 220 char buf[maxlen]; | |
| 221 char fn1[maxlen]; | |
| 222 char fn2[maxlen]; | |
| 223 for (int i=1; i<versions; i++) { | |
| 224 int j = versions - 1 - i; | |
| 225 int k = j + 1; | |
| 226 snprintf(fn1, maxlen, output, j); | |
| 227 snprintf(fn2, maxlen, output, k); | |
| 228 snprintf(buf, maxlen, "mv \"%s\" \"%s\"", fn1, fn2); | |
| 229 system(buf); | |
| 230 } | |
| 231 snprintf(buf, maxlen, wflogs, fn1); | |
| 232 system(buf); | |
| 233 openo(false); | |
| 234 } | |
| 235 } | |
| 236 | |
| 237 | |
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238 void CONTEXT::free_all() { |
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239 regfree(&re); |
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240 close(); |
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241 closeo(); |
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242 } |
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243 |
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244 |
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245 //////////////////////////////////////////////// |
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246 // |
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247 CONFIG::CONFIG() { |
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248 reference_count = 0; |
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249 generation = 0; |
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250 load_time = 0; |
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251 } |
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252 |
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253 |
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254 CONFIG::~CONFIG() { |
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255 for (context_list::iterator i=contexts.begin(); i!=contexts.end(); i++) { |
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256 CONTEXT *c = *i; |
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257 delete c; |
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258 } |
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259 } |
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260 |
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261 |
| 0 | 262 void CONFIG::dump() { |
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263 for (context_list::iterator i=contexts.begin(); i!=contexts.end(); i++) { |
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264 CONTEXTP c = *i; |
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265 c->dump(); |
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266 } |
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267 } |
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268 |
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269 |
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270 bool CONFIG::read() { |
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271 bool rc = false; |
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272 for (context_list::iterator i=contexts.begin(); i!=contexts.end(); i++) { |
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273 CONTEXT *c = *i; |
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274 rc |= c->read(); |
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275 } |
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276 } |
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277 |
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278 void CONFIG::sleep(int duration, time_t &previous) { |
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279 ::sleep(duration); |
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280 time_t now = time(NULL); |
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281 previous = now; |
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282 } |
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283 |
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284 |
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285 void CONFIG::free_all() { |
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286 for (context_list::iterator i=contexts.begin(); i!=contexts.end(); i++) { |
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287 CONTEXT *c = *i; |
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288 c->free_all(); |
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289 } |
| 0 | 290 } |
| 291 | |
| 292 | |
| 293 //////////////////////////////////////////////// | |
| 294 // helper to discard the strings held by a string_set | |
| 295 // | |
| 296 void discard(string_set &s) { | |
| 297 for (string_set::iterator i=s.begin(); i!=s.end(); i++) { | |
| 298 free((void*)*i); | |
| 299 } | |
| 300 s.clear(); | |
| 301 } | |
| 302 | |
| 303 | |
| 304 //////////////////////////////////////////////// | |
| 305 // helper to register a string in a string set | |
| 306 // | |
| 307 const char* register_string(string_set &s, const char *name) { | |
| 308 string_set::const_iterator i = s.find(name); | |
| 309 if (i != s.end()) return *i; | |
| 310 char *x = strdup(name); | |
| 311 s.insert(x); | |
| 312 return x; | |
| 313 } | |
| 314 | |
| 315 | |
| 316 //////////////////////////////////////////////// | |
| 317 // register a global string | |
| 318 // | |
| 319 const char* register_string(const char *name) { | |
| 320 return register_string(all_strings, name); | |
| 321 } | |
| 322 | |
| 323 | |
| 324 //////////////////////////////////////////////// | |
| 325 // clear all global strings, helper for valgrind checking | |
| 326 // | |
| 327 void clear_strings() { | |
| 328 discard(all_strings); | |
| 329 } | |
| 330 | |
| 331 | |
| 332 //////////////////////////////////////////////// | |
| 333 // | |
| 334 bool tsa(TOKEN &tok, const char *token); | |
| 335 bool tsa(TOKEN &tok, const char *token) { | |
| 336 const char *have = tok.next(); | |
| 337 if (have == token) return true; | |
| 338 tok.token_error(token, have); | |
| 339 return false; | |
| 340 } | |
| 341 | |
| 342 | |
| 343 //////////////////////////////////////////////// | |
| 344 // | |
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345 bool parse_context(TOKEN &tok, CONFIG &dc, CONTEXTP parent); |
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346 bool parse_context(TOKEN &tok, CONFIG &dc, CONTEXTP parent) { |
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347 const char *name = tok.next(); |
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348 if (!tsa(tok, token_lbrace)) return false; |
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349 CONTEXTP con = new CONTEXT(name); |
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350 con->set_token(tok); |
| 0 | 351 while (true) { |
| 352 const char *have = tok.next(); | |
| 353 if (!have) break; | |
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354 if (have == token_rbrace) break; // done |
| 0 | 355 if (have == token_period) { |
| 356 have = tok.next(); | |
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357 con->set_period(atoi(have)); |
| 0 | 358 if (!tsa(tok, token_semi)) return false; |
| 359 } | |
| 360 else if (have == token_versions) { | |
| 361 have = tok.next(); | |
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362 con->set_versions(atoi(have)); |
| 0 | 363 if (!tsa(tok, token_semi)) return false; |
| 364 } | |
| 365 else if (have == token_output) { | |
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366 con->set_output(tok.next()); |
| 0 | 367 if (!tsa(tok, token_semi)) return false; |
| 368 } | |
| 369 else if (have == token_tempin) { | |
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370 con->set_tempin(tok.next()); |
| 0 | 371 if (!tsa(tok, token_semi)) return false; |
| 372 } | |
| 373 else if (have == token_wflogs) { | |
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374 con->set_wflogs(tok.next()); |
| 0 | 375 if (!tsa(tok, token_semi)) return false; |
| 376 } | |
| 377 else if (have == token_file) { | |
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378 con->set_file(tok.next()); |
| 0 | 379 if (!tsa(tok, token_semi)) return false; |
| 380 } | |
| 381 else if (have == token_pattern) { | |
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382 con->pattern = tok.next(); |
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383 int rc = regcomp(&con->re, con->pattern, REG_ICASE | REG_EXTENDED); |
| 0 | 384 if (rc) { |
| 385 char bu[maxlen]; | |
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386 regerror(rc, &con->re, bu, maxlen); |
| 0 | 387 char buf[maxlen]; |
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388 snprintf(buf, sizeof(buf), "pattern %s not valid - %s", con->pattern, bu); |
| 0 | 389 tok.token_error(buf); |
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390 con->pattern = NULL; |
| 0 | 391 } |
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392 if (!tsa(tok, token_semi)) return false; |
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393 } |
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394 else if (have == token_trigger) { |
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395 have = tok.next(); |
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396 if ((have == token_hourly) || (have == token_daily) || (have == token_weekly)) { |
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397 con->trigger = have; |
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398 } |
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399 else { |
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400 tok.token_error("hourly/daily/weekly", have); |
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401 } |
| 0 | 402 if (!tsa(tok, token_semi)) return false; |
| 403 } | |
| 404 else { | |
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405 tok.token_error("period/versions/output/tempin/wflogs/file/pattern", have); |
| 0 | 406 return false; |
| 407 } | |
| 408 } | |
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409 if (!tsa(tok, token_semi)) { |
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410 delete con; |
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411 return false; |
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412 } |
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413 dc.add_context(con); |
| 0 | 414 return true; |
| 415 } | |
| 416 | |
| 417 | |
| 418 //////////////////////////////////////////////// | |
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419 // parse a config file |
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420 // |
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421 bool load_conf(CONFIG &dc, const char *fn) { |
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422 int count = 0; |
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423 TOKEN tok(fn, &dc.config_files); |
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424 while (true) { |
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425 const char *have = tok.next(); |
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426 if (!have) break; |
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427 if (have == token_context) { |
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428 if (!parse_context(tok, dc, NULL)) { |
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429 tok.token_error("load_conf() failed to parse context"); |
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430 return false; |
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431 } |
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432 else count++; |
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433 } |
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434 else { |
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435 tok.token_error(token_context, have); |
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436 return false; |
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437 } |
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438 } |
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439 tok.token_error("load_conf() found %d contexts in %s", count, fn); |
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440 return (!dc.contexts.empty()); |
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441 } |
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442 |
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443 |
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444 //////////////////////////////////////////////// |
| 0 | 445 // init the tokens |
| 446 // | |
| 447 void token_init() { | |
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448 token_context = register_string("context"); |
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449 token_daily = register_string("daily"); |
| 0 | 450 token_file = register_string("file"); |
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451 token_hourly = register_string("hourly"); |
| 0 | 452 token_include = register_string("include"); |
| 453 token_lbrace = register_string("{"); | |
| 454 token_output = register_string("output"); | |
| 455 token_pattern = register_string("pattern"); | |
| 456 token_period = register_string("period"); | |
| 457 token_rbrace = register_string("}"); | |
| 458 token_semi = register_string(";"); | |
| 459 token_tempin = register_string("tempin"); | |
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460 token_trigger = register_string("trigger"); |
| 0 | 461 token_versions = register_string("versions"); |
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462 token_weekly = register_string("weekly"); |
| 0 | 463 token_wflogs = register_string("wflogs"); |
| 464 } |