Mercurial > hg > toybox
annotate toys/pending/syslogd.c @ 995:893c86bbe452
Add daemonize function to lib for klogd and syslogd
| author | Felix Janda <felix.janda@posteo.de> |
|---|---|
| date | Sat, 10 Aug 2013 20:18:18 +0200 |
| parents | c0627c163893 |
| children | 8b1814e4c987 |
| rev | line source |
|---|---|
| 960 | 1 /* syslogd.c - a system logging utility. |
| 2 * | |
| 3 * Copyright 2013 Madhur Verma <mad.flexi@gmail.com> | |
| 4 * | |
| 5 * No Standard | |
| 6 | |
| 7 USE_SYSLOGD(NEWTOY(syslogd,">0l#<1>8=8R:b#<0>99=1s#<0=200m#<0>71582787=20O:p:f:a:nSKLD", TOYFLAG_SBIN|TOYFLAG_STAYROOT)) | |
| 8 | |
| 9 config SYSLOGD | |
| 10 bool "syslogd" | |
| 11 default n | |
| 12 help | |
| 13 Usage: syslogd [-a socket] [-p socket] [-O logfile] [-f config file] [-m interval] | |
| 14 [-p socket] [-s SIZE] [-b N] [-R HOST] [-l N] [-nSLKD] | |
| 15 | |
| 16 System logging utility | |
| 17 | |
| 18 -a Extra unix socket for listen | |
| 19 -O FILE Default log file <DEFAULT: /var/log/messages> | |
| 20 -f FILE Config file <DEFAULT: /etc/syslog.conf> | |
| 21 -p Alternative unix domain socket <DEFAULT : /dev/log> | |
| 22 -n Avoid auto-backgrounding. | |
| 23 -S Smaller output | |
| 24 -m MARK interval <DEFAULT: 20 minutes> (RANGE: 0 to 71582787) | |
| 25 -R HOST Log to IP or hostname on PORT (default PORT=514/UDP)" | |
| 26 -L Log locally and via network (default is network only if -R)" | |
| 27 -s SIZE Max size (KB) before rotation (default:200KB, 0=off) | |
| 28 -b N rotated logs to keep (default:1, max=99, 0=purge) | |
| 29 -K Log to kernel printk buffer (use dmesg to read it) | |
| 30 -l N Log only messages more urgent than prio(default:8 max:8 min:1) | |
| 31 -D Drop duplicates | |
| 32 */ | |
| 33 | |
| 34 #define FOR_syslogd | |
| 35 #include "toys.h" | |
| 36 #include "toynet.h" | |
| 37 | |
| 38 GLOBALS( | |
| 39 char *socket; | |
| 40 char *config_file; | |
| 41 char *unix_socket; | |
| 42 char *logfile; | |
| 43 long interval; | |
| 44 long rot_size; | |
| 45 long rot_count; | |
| 46 char *remote_log; | |
| 47 long log_prio; | |
| 48 | |
| 49 struct arg_list *lsocks; // list of listen sockets | |
| 50 struct arg_list *lfiles; // list of write logfiles | |
| 51 fd_set rfds; // fds for reading | |
| 52 int sd; // socket for logging remote messeges. | |
| 53 ) | |
| 54 | |
| 55 #define flag_get(f,v,d) ((toys.optflags & f) ? v : d) | |
| 56 #define flag_chk(f) ((toys.optflags & f) ? 1 : 0) | |
| 57 | |
| 58 #ifndef SYSLOG_NAMES | |
| 59 #define INTERNAL_NOPRI 0x10 | |
| 60 #define INTERNAL_MARK LOG_MAKEPRI(LOG_NFACILITIES, 0) | |
| 61 | |
| 62 typedef struct _code { | |
| 63 char *c_name; | |
| 64 int c_val; | |
| 65 } CODE; | |
| 66 | |
| 67 static CODE prioritynames[] = | |
| 68 { | |
| 69 { "alert", LOG_ALERT }, | |
| 70 { "crit", LOG_CRIT }, | |
| 71 { "debug", LOG_DEBUG }, | |
| 72 { "emerg", LOG_EMERG }, | |
| 73 { "err", LOG_ERR }, | |
| 74 { "error", LOG_ERR }, /* DEPRECATED */ | |
| 75 { "info", LOG_INFO }, | |
| 76 { "none", INTERNAL_NOPRI }, /* INTERNAL */ | |
| 77 { "notice", LOG_NOTICE }, | |
| 78 { "panic", LOG_EMERG }, /* DEPRECATED */ | |
| 79 { "warn", LOG_WARNING }, /* DEPRECATED */ | |
| 80 { "warning", LOG_WARNING }, | |
| 81 { NULL, -1 } | |
| 82 }; | |
| 83 | |
| 84 static CODE facilitynames[] = | |
| 85 { | |
| 86 { "auth", LOG_AUTH }, | |
| 87 { "authpriv", LOG_AUTHPRIV }, | |
| 88 { "cron", LOG_CRON }, | |
| 89 { "daemon", LOG_DAEMON }, | |
| 90 { "ftp", LOG_FTP }, | |
| 91 { "kern", LOG_KERN }, | |
| 92 { "lpr", LOG_LPR }, | |
| 93 { "mail", LOG_MAIL }, | |
| 94 { "mark", INTERNAL_MARK }, /* INTERNAL */ | |
| 95 { "news", LOG_NEWS }, | |
| 96 { "security", LOG_AUTH }, /* DEPRECATED */ | |
| 97 { "syslog", LOG_SYSLOG }, | |
| 98 { "user", LOG_USER }, | |
| 99 { "uucp", LOG_UUCP }, | |
| 100 { "local0", LOG_LOCAL0 }, | |
| 101 { "local1", LOG_LOCAL1 }, | |
| 102 { "local2", LOG_LOCAL2 }, | |
| 103 { "local3", LOG_LOCAL3 }, | |
| 104 { "local4", LOG_LOCAL4 }, | |
| 105 { "local5", LOG_LOCAL5 }, | |
| 106 { "local6", LOG_LOCAL6 }, | |
| 107 { "local7", LOG_LOCAL7 }, | |
| 108 { NULL, -1 } | |
| 109 }; | |
| 110 #endif | |
| 111 | |
| 112 | |
| 113 // Signal handling | |
| 114 struct fd_pair { int rd; int wr; }; | |
| 115 static struct fd_pair sigfd; | |
| 116 | |
| 117 // UNIX Sockets for listening | |
| 118 typedef struct unsocks_s { | |
| 119 char *path; | |
| 120 struct sockaddr_un sdu; | |
| 121 int sd; | |
| 122 } unsocks_t; | |
| 123 | |
| 124 // Log file entry to log into. | |
| 125 typedef struct logfile_s { | |
| 126 char *filename; | |
| 127 char *config; | |
| 128 uint8_t isNetwork; | |
| 129 uint32_t facility[8]; | |
| 130 uint8_t level[LOG_NFACILITIES]; | |
| 131 int logfd; | |
| 132 struct sockaddr_in saddr; | |
| 133 } logfile_t; | |
| 134 | |
| 135 // Adds opened socks to rfds for select() | |
| 136 static int addrfds(void) | |
| 137 { | |
| 138 unsocks_t *sock; | |
| 139 int ret = 0; | |
| 140 struct arg_list *node = TT.lsocks; | |
| 141 FD_ZERO(&TT.rfds); | |
| 142 | |
| 143 while (node) { | |
| 144 sock = (unsocks_t*) node->arg; | |
| 145 if (sock->sd > 2) { | |
| 146 FD_SET(sock->sd, &TT.rfds); | |
| 147 ret = sock->sd; | |
| 148 } | |
| 149 node = node->next; | |
| 150 } | |
| 151 FD_SET(sigfd.rd, &TT.rfds); | |
| 152 return (sigfd.rd > ret)?sigfd.rd:ret; | |
| 153 } | |
| 154 | |
| 155 /* | |
| 156 * initializes unsock_t structure | |
| 157 * and opens socket for reading | |
| 158 * and adds to global lsock list. | |
| 159 */ | |
| 160 static int open_unix_socks(void) | |
| 161 { | |
| 162 struct arg_list *node; | |
| 163 unsocks_t *sock; | |
| 164 int ret = 0; | |
| 165 | |
| 166 for(node = TT.lsocks; node; node = node->next) { | |
| 167 sock = (unsocks_t*) node->arg; | |
| 168 sock->sdu.sun_family = AF_UNIX; | |
| 169 strcpy(sock->sdu.sun_path, sock->path); | |
| 170 sock->sd = socket(AF_UNIX, SOCK_DGRAM, 0); | |
| 171 if (sock->sd < 0) { | |
| 172 perror_msg("OPEN SOCKS : failed"); | |
| 173 continue; | |
| 174 } | |
| 175 unlink(sock->sdu.sun_path); | |
| 176 if (bind(sock->sd, (struct sockaddr *) &sock->sdu, sizeof(sock->sdu))) { | |
| 177 perror_msg("BIND SOCKS : failed sock : %s", sock->sdu.sun_path); | |
| 178 close(sock->sd); | |
| 179 continue; | |
| 180 } | |
| 181 chmod(sock->path, 0777); | |
| 182 ret++; | |
| 183 } | |
| 184 return ret; | |
| 185 } | |
| 186 | |
| 187 /* | |
| 188 * creates a socket of family INET and protocol UDP | |
| 189 * if successful then returns SOCK othrwise error | |
| 190 */ | |
| 191 static int open_udp_socks(char *host, int port, struct sockaddr_in *sadd) | |
| 192 { | |
| 193 struct addrinfo *info, rp; | |
| 194 | |
| 195 memset(&rp, 0, sizeof(rp)); | |
| 196 rp.ai_family = AF_INET; | |
| 197 rp.ai_socktype = SOCK_DGRAM; | |
| 198 rp.ai_protocol = IPPROTO_UDP; | |
| 199 | |
| 200 if (getaddrinfo(host, NULL, &rp, &info) || !info) | |
| 201 perror_exit("BAD ADDRESS: can't find : %s ", host); | |
| 202 ((struct sockaddr_in*)info->ai_addr)->sin_port = htons(port); | |
| 203 memcpy(sadd, info->ai_addr, info->ai_addrlen); | |
| 204 freeaddrinfo(info); | |
| 205 | |
| 206 return xsocket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); | |
| 207 } | |
| 208 | |
| 209 // Returns node having filename | |
| 210 static struct arg_list *get_file_node(char *filename, struct arg_list *list) | |
| 211 { | |
| 212 while (list) { | |
| 213 if (!strcmp(((logfile_t*) list->arg)->filename, filename)) return list; | |
| 214 list = list->next; | |
| 215 } | |
| 216 return list; | |
| 217 } | |
| 218 | |
| 219 /* | |
| 220 * recurses the logfile list and resolves config | |
| 221 * for evry file and updates facilty and log level bits. | |
| 222 */ | |
| 223 static int resolve_config(logfile_t *file) | |
| 224 { | |
| 225 char *tk, *fac, *lvl, *tmp, *nfac; | |
| 226 int count = 0; | |
| 227 unsigned facval = 0; | |
| 228 uint8_t set, levval, neg; | |
| 229 CODE *val = NULL; | |
| 230 | |
| 231 tmp = xstrdup(file->config); | |
| 232 for (tk = strtok(tmp, "; \0"); tk; tk = strtok(NULL, "; \0")) { | |
| 233 fac = tk; | |
| 234 tk = strchr(fac, '.'); | |
| 235 if (!tk) return -1; | |
| 236 *tk = '\0'; | |
| 237 lvl = tk + 1; | |
| 238 | |
| 239 while(1) { | |
| 240 count = 0; | |
| 241 if (*fac == '*') { | |
| 242 facval = 0xFFFFFFFF; | |
| 243 fac++; | |
| 244 } | |
| 245 nfac = strchr(fac, ','); | |
| 246 if (nfac) *nfac = '\0'; | |
| 247 while (*fac && ((CODE*) &facilitynames[count])->c_name) { | |
| 248 val = (CODE*) &facilitynames[count]; | |
| 249 if (!strcmp(fac, val->c_name)) { | |
| 250 facval |= (1<<LOG_FAC(val->c_val)); | |
| 251 break; | |
| 252 } | |
| 253 count++; | |
| 254 } | |
| 255 if (((CODE*) &facilitynames[count])->c_val == -1) | |
| 256 return -1; | |
| 257 | |
| 258 if (nfac) fac = nfac+1; | |
| 259 else break; | |
| 260 } | |
| 261 | |
| 262 count = 0; | |
| 263 set = 0; | |
| 264 levval = 0; | |
| 265 neg = 0; | |
| 266 if (*lvl == '!') { | |
| 267 neg = 1; | |
| 268 lvl++; | |
| 269 } | |
| 270 if (*lvl == '=') { | |
| 271 set = 1; | |
| 272 lvl++; | |
| 273 } | |
| 274 if (*lvl == '*') { | |
| 275 levval = 0xFF; | |
| 276 lvl++; | |
| 277 } | |
| 278 while (*lvl && ((CODE*) &prioritynames[count])->c_name) { | |
| 279 val = (CODE*) &prioritynames[count]; | |
| 280 if (!strcmp(lvl, val->c_name)) { | |
| 281 levval |= set ? LOG_MASK(val->c_val):LOG_UPTO(val->c_val); | |
| 282 if (neg) levval = ~levval; | |
| 283 break; | |
| 284 } | |
| 285 count++; | |
| 286 } | |
| 287 if (((CODE*) &prioritynames[count])->c_val == -1) return -1; | |
| 288 | |
| 289 count = 0; | |
| 290 set = levval; | |
| 291 while(set) { | |
| 292 if (set & 0x1) file->facility[count] |= facval; | |
| 293 set >>= 1; | |
| 294 count++; | |
| 295 } | |
| 296 for (count = 0; count < LOG_NFACILITIES; count++) { | |
| 297 if (facval & 0x1) file->level[count] |= levval; | |
| 298 facval >>= 1; | |
| 299 } | |
| 300 } | |
| 301 free(tmp); | |
| 302 | |
| 303 return 0; | |
| 304 } | |
| 305 | |
| 306 // Parse config file and update the log file list. | |
| 307 static int parse_config_file(void) | |
| 308 { | |
| 309 logfile_t *file; | |
| 310 FILE *fp = NULL; | |
| 311 char *confline = NULL, *tk = NULL, *tokens[2] = {NULL, NULL}; | |
| 312 int len, linelen, tcount, lineno = 0; | |
| 313 struct arg_list *node; | |
| 314 /* | |
| 315 * if -K then open only /dev/kmsg | |
| 316 * all other log files are neglected | |
| 317 * thus no need to open config either. | |
| 318 */ | |
| 319 if (flag_chk(FLAG_K)) { | |
| 320 node = xzalloc(sizeof(struct arg_list)); | |
| 321 file = xzalloc(sizeof(logfile_t)); | |
| 322 file->filename = "/dev/kmsg"; | |
| 323 file->config = "*.*"; | |
| 324 memset(file->level, 0xFF, sizeof(file->level)); | |
| 325 memset(file->facility, 0xFFFFFFFF, sizeof(file->facility)); | |
| 326 node->arg = (char*) file; | |
| 327 TT.lfiles = node; | |
| 328 return 0; | |
| 329 } | |
| 330 /* | |
| 331 * if -R then add remote host to log list | |
| 332 * if -L is not provided all other log | |
| 333 * files are neglected thus no need to | |
| 334 * open config either so just return. | |
| 335 */ | |
| 336 if (flag_chk(FLAG_R)) { | |
| 337 node = xzalloc(sizeof(struct arg_list)); | |
| 338 file = xzalloc(sizeof(logfile_t)); | |
| 339 file->filename = xmsprintf("@%s",TT.remote_log); | |
| 340 file->isNetwork = 1; | |
| 341 file->config = "*.*"; | |
| 342 memset(file->level, 0xFF, sizeof(file->level)); | |
| 343 memset(file->facility, 0xFFFFFFFF, sizeof(file->facility)); | |
| 344 node->arg = (char*) file; | |
| 345 TT.lfiles = node; | |
| 346 if (!flag_chk(FLAG_L))return 0; | |
| 347 } | |
| 348 /* | |
| 349 * Read config file and add logfiles to the list | |
| 350 * with their configuration. | |
| 351 */ | |
| 352 fp = fopen(TT.config_file, "r"); | |
| 353 if (!fp && flag_chk(FLAG_f)) | |
| 354 perror_exit("can't open '%s'", TT.config_file); | |
| 355 | |
| 356 for (len = 0, linelen = 0; fp;) { | |
| 357 len = getline(&confline, (size_t*) &linelen, fp); | |
| 358 if (len <= 0) break; | |
| 359 lineno++; | |
| 360 for (; *confline == ' '; confline++, len--) ; | |
| 361 if ((confline[0] == '#') || (confline[0] == '\n')) continue; | |
| 362 for (tcount = 0, tk = strtok(confline, " \t"); tk && (tcount < 2); tk = | |
| 363 strtok(NULL, " \t"), tcount++) { | |
| 364 if (tcount == 2) { | |
| 365 error_msg("error in '%s' at line %d", TT.config_file, lineno); | |
| 366 return -1; | |
| 367 } | |
| 368 tokens[tcount] = xstrdup(tk); | |
| 369 } | |
| 370 if (tcount <= 1 || tcount > 2) { | |
| 371 if (tokens[0]) free(tokens[0]); | |
| 372 error_msg("bad line %d: 1 tokens found, 2 needed", lineno); | |
| 373 return -1; | |
| 374 } | |
| 375 tk = (tokens[1] + (strlen(tokens[1]) - 1)); | |
| 376 if (*tk == '\n') *tk = '\0'; | |
| 377 if (*tokens[1] == '\0') { | |
| 378 error_msg("bad line %d: 1 tokens found, 2 needed", lineno); | |
| 379 return -1; | |
| 380 } | |
| 381 if (*tokens[1] == '*') goto loop_again; | |
| 382 | |
| 383 node = get_file_node(tokens[1], TT.lfiles); | |
| 384 if (!node) { | |
| 385 node = xzalloc(sizeof(struct arg_list)); | |
| 386 file = xzalloc(sizeof(logfile_t)); | |
| 387 file->config = xstrdup(tokens[0]); | |
| 388 if (resolve_config(file)==-1) { | |
| 389 error_msg("error in '%s' at line %d", TT.config_file, lineno); | |
| 390 return -1; | |
| 391 } | |
| 392 file->filename = xstrdup(tokens[1]); | |
| 393 if (*file->filename == '@') file->isNetwork = 1; | |
| 394 node->arg = (char*) file; | |
| 395 node->next = TT.lfiles; | |
| 396 TT.lfiles = node; | |
| 397 } else { | |
| 398 file = (logfile_t*) node->arg; | |
| 399 int rel = strlen(file->config) + strlen(tokens[0]) + 2; | |
| 400 file->config = xrealloc(file->config, rel); | |
| 401 sprintf(file->config, "%s;%s", file->config, tokens[0]); | |
| 402 } | |
| 403 loop_again: | |
| 404 if (tokens[0]) free(tokens[0]); | |
| 405 if (tokens[1]) free(tokens[1]); | |
| 406 free(confline); | |
| 407 confline = NULL; | |
| 408 } | |
| 409 /* | |
| 410 * Can't open config file or support is not enabled | |
| 411 * adding default logfile to the head of list. | |
| 412 */ | |
| 413 if (!fp){ | |
| 414 node = xzalloc(sizeof(struct arg_list)); | |
| 415 file = xzalloc(sizeof(logfile_t)); | |
| 416 file->filename = flag_get(FLAG_O, TT.logfile, "/var/log/messages"); //DEFLOGFILE | |
| 417 file->isNetwork = 0; | |
| 418 file->config = "*.*"; | |
| 419 memset(file->level, 0xFF, sizeof(file->level)); | |
| 420 memset(file->facility, 0xFFFFFFFF, sizeof(file->facility)); | |
| 421 node->arg = (char*) file; | |
| 422 node->next = TT.lfiles; | |
| 423 TT.lfiles = node; | |
| 424 } | |
| 425 if (fp) { | |
| 426 fclose(fp); | |
| 427 fp = NULL; | |
| 428 } | |
| 429 return 0; | |
| 430 } | |
| 431 | |
| 432 static int getport(char *str, char *filename) | |
| 433 { | |
| 434 char *endptr = NULL; | |
| 435 int base = 10; | |
| 436 errno = 0; | |
| 437 if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X')) { | |
| 438 base = 16; | |
| 439 str += 2; | |
| 440 } | |
| 441 long port = strtol(str, &endptr, base); | |
| 442 if (errno || *endptr!='\0'|| endptr == str | |
| 443 || port < 0 || port > 65535) error_exit("wrong port no in %s", filename); | |
| 444 return (int)port; | |
| 445 } | |
| 446 | |
| 447 // open every log file in list. | |
| 448 static void open_logfiles(void) | |
| 449 { | |
| 450 logfile_t *tfd; | |
| 451 char *p, *tmpfile; | |
| 452 int port = -1; | |
| 453 struct arg_list *node = TT.lfiles; | |
| 454 | |
| 455 while (node) { | |
| 456 tfd = (logfile_t*) node->arg; | |
| 457 if (tfd->isNetwork) { | |
| 458 tmpfile = xstrdup(tfd->filename +1); | |
| 459 if ((p = strchr(tmpfile, ':'))) { | |
| 460 *p = '\0'; | |
| 461 port = getport(p + 1, tfd->filename); | |
| 462 } | |
| 463 tfd->logfd = open_udp_socks(tmpfile, (port>=0)?port:514, &tfd->saddr); | |
| 464 free(tmpfile); | |
| 465 } else tfd->logfd = open(tfd->filename, O_CREAT | O_WRONLY | O_APPEND, 0666); | |
| 466 if (tfd->logfd < 0) { | |
| 467 tfd->filename = "/dev/console"; | |
| 468 tfd->logfd = open(tfd->filename, O_APPEND); | |
| 469 } | |
| 470 node = node->next; | |
| 471 } | |
| 472 } | |
| 473 | |
| 474 //write to file with rotation | |
| 475 static int write_rotate( logfile_t *tf, int len) | |
| 476 { | |
| 477 int size, isreg; | |
| 478 struct stat statf; | |
| 479 isreg = (!fstat(tf->logfd, &statf) && S_ISREG(statf.st_mode)); | |
| 480 size = statf.st_size; | |
| 481 | |
| 482 if (flag_chk(FLAG_s) || flag_chk(FLAG_b)) { | |
| 483 if (TT.rot_size && isreg && (size + len) > (TT.rot_size*1024)) { | |
| 484 if (TT.rot_count) { /* always 0..99 */ | |
| 485 int i = strlen(tf->filename) + 3 + 1; | |
| 486 char old_file[i]; | |
| 487 char new_file[i]; | |
| 488 i = TT.rot_count - 1; | |
| 489 while (1) { | |
| 490 sprintf(new_file, "%s.%d", tf->filename, i); | |
| 491 if (!i) break; | |
| 492 sprintf(old_file, "%s.%d", tf->filename, --i); | |
| 493 rename(old_file, new_file); | |
| 494 } | |
| 495 rename(tf->filename, new_file); | |
| 496 unlink(tf->filename); | |
| 497 close(tf->logfd); | |
| 498 tf->logfd = open(tf->filename, O_CREAT | O_WRONLY | O_APPEND, 0666); | |
| 499 } | |
| 500 ftruncate(tf->logfd, 0); | |
| 501 } | |
| 502 } | |
| 503 return write(tf->logfd, toybuf, len); | |
| 504 } | |
| 505 | |
| 506 //search the given name and return its value | |
| 507 static char *dec(int val, CODE *clist) | |
| 508 { | |
| 509 const CODE *c; | |
| 510 | |
| 511 for (c = clist; c->c_name; c++) | |
| 512 if (val == c->c_val) return c->c_name; | |
| 513 return itoa(val); | |
| 514 } | |
| 515 | |
| 516 // Compute priority from "facility.level" pair | |
| 517 static void priority_to_string(int pri, char **facstr, char **lvlstr) | |
| 518 { | |
| 519 int fac,lev; | |
| 520 | |
| 521 fac = LOG_FAC(pri); | |
| 522 lev = LOG_PRI(pri); | |
| 523 *facstr = dec(fac<<3, facilitynames); | |
| 524 *lvlstr = dec(lev, prioritynames); | |
| 525 } | |
| 526 | |
| 527 //Parse messege and write to file. | |
| 528 static void logmsg(char *msg, int len) | |
| 529 { | |
| 530 time_t now; | |
| 531 char *p, *ts, *lvlstr, *facstr; | |
| 532 struct utsname uts; | |
| 533 int pri = 0; | |
| 534 struct arg_list *lnode = TT.lfiles; | |
| 535 | |
| 536 char *omsg = msg; | |
| 537 int olen = len, fac, lvl; | |
| 538 | |
| 539 if (*msg == '<') { // Extract the priority no. | |
| 540 pri = (int) strtoul(msg + 1, &p, 10); | |
| 541 if (*p == '>') msg = p + 1; | |
| 542 } | |
| 543 /* Jan 18 00:11:22 msg... | |
| 544 * 01234567890123456 | |
| 545 */ | |
| 546 if (len < 16 || msg[3] != ' ' || msg[6] != ' ' || msg[9] != ':' | |
| 547 || msg[12] != ':' || msg[15] != ' ') { | |
| 548 time(&now); | |
| 549 ts = ctime(&now) + 4; /* skip day of week */ | |
| 550 } else { | |
| 551 now = 0; | |
| 552 ts = msg; | |
| 553 msg += 16; | |
| 554 } | |
| 555 ts[15] = '\0'; | |
| 556 fac = LOG_FAC(pri); | |
| 557 lvl = LOG_PRI(pri); | |
| 558 | |
| 559 if (flag_chk(FLAG_K)) { | |
| 560 len = sprintf(toybuf, "<%d> %s\n", pri, msg); | |
| 561 goto do_log; | |
| 562 } | |
| 563 priority_to_string(pri, &facstr, &lvlstr); | |
| 564 | |
| 565 p = "local"; | |
| 566 if (!uname(&uts)) p = uts.nodename; | |
| 567 if (flag_chk(FLAG_S)) len = sprintf(toybuf, "%s %s\n", ts, msg); | |
| 568 else len = sprintf(toybuf, "%s %s %s.%s %s\n", ts, p, facstr, lvlstr, msg); | |
| 569 | |
| 570 do_log: | |
| 571 if (lvl >= TT.log_prio) return; | |
| 572 | |
| 573 while (lnode) { | |
| 574 logfile_t *tf = (logfile_t*) lnode->arg; | |
| 575 if (tf->logfd > 0) { | |
| 576 if ((tf->facility[lvl] & (1 << fac)) && (tf->level[fac] & (1<<lvl))) { | |
| 577 int wlen; | |
| 578 if (tf->isNetwork) | |
| 579 wlen = sendto(tf->logfd, omsg, olen, 0, (struct sockaddr*)&tf->saddr, sizeof(tf->saddr)); | |
| 580 else wlen = write_rotate(tf, len); | |
| 581 if (wlen < 0) perror_msg("write failed file : %s ", (tf->isNetwork)?(tf->filename+1):tf->filename); | |
| 582 } | |
| 583 } | |
| 584 lnode = lnode->next; | |
| 585 } | |
| 586 } | |
| 587 | |
| 588 /* | |
| 589 * closes all read and write fds | |
| 590 * and frees all nodes and lists | |
| 591 */ | |
| 592 static void cleanup(void) | |
| 593 { | |
| 594 struct arg_list *fnode; | |
| 595 while (TT.lsocks) { | |
| 596 fnode = TT.lsocks; | |
| 597 if (((unsocks_t*) fnode->arg)->sd >= 0) | |
| 598 close(((unsocks_t*) fnode->arg)->sd); | |
| 599 free(fnode->arg); | |
| 600 TT.lsocks = fnode->next; | |
| 601 free(fnode); | |
| 602 } | |
| 603 unlink("/dev/log"); | |
| 604 | |
| 605 while (TT.lfiles) { | |
| 606 fnode = TT.lfiles; | |
| 607 if (((logfile_t*) fnode->arg)->logfd >= 0) | |
| 608 close(((logfile_t*) fnode->arg)->logfd); | |
| 609 free(fnode->arg); | |
| 610 TT.lfiles = fnode->next; | |
| 611 free(fnode); | |
| 612 } | |
| 613 } | |
| 614 | |
| 615 static void signal_handler(int sig) | |
| 616 { | |
| 617 unsigned char ch = sig; | |
| 618 if (write(sigfd.wr, &ch, 1) != 1) error_msg("can't send signal"); | |
| 619 } | |
| 620 | |
| 621 static void setup_signal() | |
| 622 { | |
| 623 if (pipe((int *)&sigfd) < 0) error_exit("pipe failed\n"); | |
| 624 | |
| 625 fcntl(sigfd.wr , F_SETFD, FD_CLOEXEC); | |
| 626 fcntl(sigfd.rd , F_SETFD, FD_CLOEXEC); | |
| 627 int flags = fcntl(sigfd.wr, F_GETFL); | |
| 628 fcntl(sigfd.wr, F_SETFL, flags | O_NONBLOCK); | |
| 629 signal(SIGHUP, signal_handler); | |
| 630 signal(SIGTERM, signal_handler); | |
| 631 signal(SIGINT, signal_handler); | |
| 632 signal(SIGQUIT, signal_handler); | |
| 633 } | |
| 634 | |
| 635 void syslogd_main(void) | |
| 636 { | |
| 637 unsocks_t *tsd; | |
| 638 int maxfd, retval, last_len=0; | |
| 639 struct timeval tv; | |
| 640 struct arg_list *node; | |
| 641 char *temp, *buffer = (toybuf +2048), *last_buf = (toybuf + 3072); //these two buffs are of 1K each | |
| 642 | |
| 643 if (flag_chk(FLAG_p) && strlen(TT.unix_socket) > 108) | |
| 644 error_exit("Socket path should not be more than 108"); | |
| 645 | |
| 646 TT.config_file = flag_get(FLAG_f, TT.config_file, "/etc/syslog.conf"); //DEFCONFFILE | |
| 647 init_jumpin: | |
| 648 TT.lsocks = xzalloc(sizeof(struct arg_list)); | |
| 649 tsd = xzalloc(sizeof(unsocks_t)); | |
| 650 | |
| 651 tsd->path = flag_get(FLAG_p, TT.unix_socket , "/dev/log"); // DEFLOGSOCK | |
| 652 TT.lsocks->arg = (char*) tsd; | |
| 653 | |
| 654 if (flag_chk(FLAG_a)) { | |
| 655 for (temp = strtok(TT.socket, ":"); temp; temp = strtok(NULL, ":")) { | |
| 656 struct arg_list *ltemp = xzalloc(sizeof(struct arg_list)); | |
| 657 if (strlen(temp) > 107) temp[108] = '\0'; | |
| 658 tsd = xzalloc(sizeof(unsocks_t)); | |
| 659 tsd->path = temp; | |
| 660 ltemp->arg = (char*) tsd; | |
| 661 ltemp->next = TT.lsocks; | |
| 662 TT.lsocks = ltemp; | |
| 663 } | |
| 664 } | |
| 665 if (!open_unix_socks()) { | |
| 666 error_msg("Can't open single socket for listenning."); | |
| 667 goto clean_and_exit; | |
| 668 } | |
| 669 setup_signal(); | |
| 670 if (parse_config_file() == -1) goto clean_and_exit; | |
| 671 open_logfiles(); | |
|
995
893c86bbe452
Add daemonize function to lib for klogd and syslogd
Felix Janda <felix.janda@posteo.de>
parents:
960
diff
changeset
|
672 if (!flag_chk(FLAG_n)) { |
|
893c86bbe452
Add daemonize function to lib for klogd and syslogd
Felix Janda <felix.janda@posteo.de>
parents:
960
diff
changeset
|
673 //don't daemonize again if SIGHUP received. |
|
893c86bbe452
Add daemonize function to lib for klogd and syslogd
Felix Janda <felix.janda@posteo.de>
parents:
960
diff
changeset
|
674 toys.optflags |= FLAG_n; |
|
893c86bbe452
Add daemonize function to lib for klogd and syslogd
Felix Janda <felix.janda@posteo.de>
parents:
960
diff
changeset
|
675 } |
| 960 | 676 { |
| 677 int pid_fd = open("/var/run/syslogd.pid", O_CREAT | O_WRONLY | O_TRUNC, 0666); | |
| 678 if (pid_fd > 0) { | |
| 679 unsigned pid = getpid(); | |
| 680 int len = sprintf(toybuf, "%u\n", pid); | |
| 681 write(pid_fd, toybuf, len); | |
| 682 close(pid_fd); | |
| 683 } | |
| 684 } | |
| 685 | |
| 686 logmsg("<46>Toybox: syslogd started", 27); //27 : the length of message | |
| 687 for (;;) { | |
| 688 maxfd = addrfds(); | |
| 689 tv.tv_usec = 0; | |
| 690 tv.tv_sec = TT.interval*60; | |
| 691 | |
| 692 retval = select(maxfd + 1, &TT.rfds, NULL, NULL, (TT.interval)?&tv:NULL); | |
| 693 if (retval < 0) { /* Some error. */ | |
| 694 if (errno == EINTR) continue; | |
| 695 perror_msg("Error in select "); | |
| 696 continue; | |
| 697 } | |
| 698 if (!retval) { /* Timed out */ | |
| 699 logmsg("<46>-- MARK --", 14); | |
| 700 continue; | |
| 701 } | |
| 702 if (FD_ISSET(sigfd.rd, &TT.rfds)) { /* May be a signal */ | |
| 703 unsigned char sig; | |
| 704 | |
| 705 if (read(sigfd.rd, &sig, 1) != 1) { | |
| 706 error_msg("signal read failed.\n"); | |
| 707 continue; | |
| 708 } | |
| 709 switch(sig) { | |
| 710 case SIGTERM: /* FALLTHROUGH */ | |
| 711 case SIGINT: /* FALLTHROUGH */ | |
| 712 case SIGQUIT: | |
| 713 logmsg("<46>syslogd exiting", 19); | |
| 714 if (CFG_TOYBOX_FREE ) cleanup(); | |
| 715 signal(sig, SIG_DFL); | |
| 716 sigset_t ss; | |
| 717 sigemptyset(&ss); | |
| 718 sigaddset(&ss, sig); | |
| 719 sigprocmask(SIG_UNBLOCK, &ss, NULL); | |
| 720 raise(sig); | |
| 721 _exit(1); /* Should not reach it */ | |
| 722 break; | |
| 723 case SIGHUP: | |
| 724 logmsg("<46>syslogd exiting", 19); | |
| 725 cleanup(); //cleanup is done, as we restart syslog. | |
| 726 goto init_jumpin; | |
| 727 default: break; | |
| 728 } | |
| 729 } | |
| 730 if (retval > 0) { /* Some activity on listen sockets. */ | |
| 731 node = TT.lsocks; | |
| 732 while (node) { | |
| 733 int sd = ((unsocks_t*) node->arg)->sd; | |
| 734 if (FD_ISSET(sd, &TT.rfds)) { | |
| 735 int len = read(sd, buffer, 1023); //buffer is of 1K, hence readingonly 1023 bytes, 1 for NUL | |
| 736 if (len > 0) { | |
| 737 buffer[len] = '\0'; | |
| 738 if(flag_chk(FLAG_D) && (len == last_len)) | |
| 739 if (!memcmp(last_buf, buffer, len)) break; | |
| 740 | |
| 741 memcpy(last_buf, buffer, len); | |
| 742 last_len = len; | |
| 743 logmsg(buffer, len); | |
| 744 } | |
| 745 break; | |
| 746 } | |
| 747 node = node->next; | |
| 748 } | |
| 749 } | |
| 750 } | |
| 751 clean_and_exit: | |
| 752 logmsg("<46>syslogd exiting", 19); | |
| 753 if (CFG_TOYBOX_FREE ) cleanup(); | |
| 754 } |