Mercurial > hg > toybox
annotate toys/pending/syslogd.c @ 997:8b1814e4c987
Ashwini Sharma said that Kyungwan Han should be in the contact info for the commands he sent recently.
| author | Rob Landley <rob@landley.net> |
|---|---|
| date | Sun, 11 Aug 2013 21:56:08 -0500 |
| parents | 893c86bbe452 |
| children | f9271a80fedc |
| rev | line source |
|---|---|
| 960 | 1 /* syslogd.c - a system logging utility. |
| 2 * | |
| 3 * Copyright 2013 Madhur Verma <mad.flexi@gmail.com> | |
|
997
8b1814e4c987
Ashwini Sharma said that Kyungwan Han should be in the contact info for the commands he sent recently.
Rob Landley <rob@landley.net>
parents:
995
diff
changeset
|
4 * Copyright 2013 Kyungwan Han <asura321@gmail.com> |
| 960 | 5 * |
| 6 * No Standard | |
| 7 | |
| 8 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)) | |
| 9 | |
| 10 config SYSLOGD | |
| 11 bool "syslogd" | |
| 12 default n | |
| 13 help | |
| 14 Usage: syslogd [-a socket] [-p socket] [-O logfile] [-f config file] [-m interval] | |
| 15 [-p socket] [-s SIZE] [-b N] [-R HOST] [-l N] [-nSLKD] | |
| 16 | |
| 17 System logging utility | |
| 18 | |
| 19 -a Extra unix socket for listen | |
| 20 -O FILE Default log file <DEFAULT: /var/log/messages> | |
| 21 -f FILE Config file <DEFAULT: /etc/syslog.conf> | |
| 22 -p Alternative unix domain socket <DEFAULT : /dev/log> | |
| 23 -n Avoid auto-backgrounding. | |
| 24 -S Smaller output | |
| 25 -m MARK interval <DEFAULT: 20 minutes> (RANGE: 0 to 71582787) | |
| 26 -R HOST Log to IP or hostname on PORT (default PORT=514/UDP)" | |
| 27 -L Log locally and via network (default is network only if -R)" | |
| 28 -s SIZE Max size (KB) before rotation (default:200KB, 0=off) | |
| 29 -b N rotated logs to keep (default:1, max=99, 0=purge) | |
| 30 -K Log to kernel printk buffer (use dmesg to read it) | |
| 31 -l N Log only messages more urgent than prio(default:8 max:8 min:1) | |
| 32 -D Drop duplicates | |
| 33 */ | |
| 34 | |
| 35 #define FOR_syslogd | |
| 36 #include "toys.h" | |
| 37 #include "toynet.h" | |
| 38 | |
| 39 GLOBALS( | |
| 40 char *socket; | |
| 41 char *config_file; | |
| 42 char *unix_socket; | |
| 43 char *logfile; | |
| 44 long interval; | |
| 45 long rot_size; | |
| 46 long rot_count; | |
| 47 char *remote_log; | |
| 48 long log_prio; | |
| 49 | |
| 50 struct arg_list *lsocks; // list of listen sockets | |
| 51 struct arg_list *lfiles; // list of write logfiles | |
| 52 fd_set rfds; // fds for reading | |
| 53 int sd; // socket for logging remote messeges. | |
| 54 ) | |
| 55 | |
| 56 #define flag_get(f,v,d) ((toys.optflags & f) ? v : d) | |
| 57 #define flag_chk(f) ((toys.optflags & f) ? 1 : 0) | |
| 58 | |
| 59 #ifndef SYSLOG_NAMES | |
| 60 #define INTERNAL_NOPRI 0x10 | |
| 61 #define INTERNAL_MARK LOG_MAKEPRI(LOG_NFACILITIES, 0) | |
| 62 | |
| 63 typedef struct _code { | |
| 64 char *c_name; | |
| 65 int c_val; | |
| 66 } CODE; | |
| 67 | |
| 68 static CODE prioritynames[] = | |
| 69 { | |
| 70 { "alert", LOG_ALERT }, | |
| 71 { "crit", LOG_CRIT }, | |
| 72 { "debug", LOG_DEBUG }, | |
| 73 { "emerg", LOG_EMERG }, | |
| 74 { "err", LOG_ERR }, | |
| 75 { "error", LOG_ERR }, /* DEPRECATED */ | |
| 76 { "info", LOG_INFO }, | |
| 77 { "none", INTERNAL_NOPRI }, /* INTERNAL */ | |
| 78 { "notice", LOG_NOTICE }, | |
| 79 { "panic", LOG_EMERG }, /* DEPRECATED */ | |
| 80 { "warn", LOG_WARNING }, /* DEPRECATED */ | |
| 81 { "warning", LOG_WARNING }, | |
| 82 { NULL, -1 } | |
| 83 }; | |
| 84 | |
| 85 static CODE facilitynames[] = | |
| 86 { | |
| 87 { "auth", LOG_AUTH }, | |
| 88 { "authpriv", LOG_AUTHPRIV }, | |
| 89 { "cron", LOG_CRON }, | |
| 90 { "daemon", LOG_DAEMON }, | |
| 91 { "ftp", LOG_FTP }, | |
| 92 { "kern", LOG_KERN }, | |
| 93 { "lpr", LOG_LPR }, | |
| 94 { "mail", LOG_MAIL }, | |
| 95 { "mark", INTERNAL_MARK }, /* INTERNAL */ | |
| 96 { "news", LOG_NEWS }, | |
| 97 { "security", LOG_AUTH }, /* DEPRECATED */ | |
| 98 { "syslog", LOG_SYSLOG }, | |
| 99 { "user", LOG_USER }, | |
| 100 { "uucp", LOG_UUCP }, | |
| 101 { "local0", LOG_LOCAL0 }, | |
| 102 { "local1", LOG_LOCAL1 }, | |
| 103 { "local2", LOG_LOCAL2 }, | |
| 104 { "local3", LOG_LOCAL3 }, | |
| 105 { "local4", LOG_LOCAL4 }, | |
| 106 { "local5", LOG_LOCAL5 }, | |
| 107 { "local6", LOG_LOCAL6 }, | |
| 108 { "local7", LOG_LOCAL7 }, | |
| 109 { NULL, -1 } | |
| 110 }; | |
| 111 #endif | |
| 112 | |
| 113 | |
| 114 // Signal handling | |
| 115 struct fd_pair { int rd; int wr; }; | |
| 116 static struct fd_pair sigfd; | |
| 117 | |
| 118 // UNIX Sockets for listening | |
| 119 typedef struct unsocks_s { | |
| 120 char *path; | |
| 121 struct sockaddr_un sdu; | |
| 122 int sd; | |
| 123 } unsocks_t; | |
| 124 | |
| 125 // Log file entry to log into. | |
| 126 typedef struct logfile_s { | |
| 127 char *filename; | |
| 128 char *config; | |
| 129 uint8_t isNetwork; | |
| 130 uint32_t facility[8]; | |
| 131 uint8_t level[LOG_NFACILITIES]; | |
| 132 int logfd; | |
| 133 struct sockaddr_in saddr; | |
| 134 } logfile_t; | |
| 135 | |
| 136 // Adds opened socks to rfds for select() | |
| 137 static int addrfds(void) | |
| 138 { | |
| 139 unsocks_t *sock; | |
| 140 int ret = 0; | |
| 141 struct arg_list *node = TT.lsocks; | |
| 142 FD_ZERO(&TT.rfds); | |
| 143 | |
| 144 while (node) { | |
| 145 sock = (unsocks_t*) node->arg; | |
| 146 if (sock->sd > 2) { | |
| 147 FD_SET(sock->sd, &TT.rfds); | |
| 148 ret = sock->sd; | |
| 149 } | |
| 150 node = node->next; | |
| 151 } | |
| 152 FD_SET(sigfd.rd, &TT.rfds); | |
| 153 return (sigfd.rd > ret)?sigfd.rd:ret; | |
| 154 } | |
| 155 | |
| 156 /* | |
| 157 * initializes unsock_t structure | |
| 158 * and opens socket for reading | |
| 159 * and adds to global lsock list. | |
| 160 */ | |
| 161 static int open_unix_socks(void) | |
| 162 { | |
| 163 struct arg_list *node; | |
| 164 unsocks_t *sock; | |
| 165 int ret = 0; | |
| 166 | |
| 167 for(node = TT.lsocks; node; node = node->next) { | |
| 168 sock = (unsocks_t*) node->arg; | |
| 169 sock->sdu.sun_family = AF_UNIX; | |
| 170 strcpy(sock->sdu.sun_path, sock->path); | |
| 171 sock->sd = socket(AF_UNIX, SOCK_DGRAM, 0); | |
| 172 if (sock->sd < 0) { | |
| 173 perror_msg("OPEN SOCKS : failed"); | |
| 174 continue; | |
| 175 } | |
| 176 unlink(sock->sdu.sun_path); | |
| 177 if (bind(sock->sd, (struct sockaddr *) &sock->sdu, sizeof(sock->sdu))) { | |
| 178 perror_msg("BIND SOCKS : failed sock : %s", sock->sdu.sun_path); | |
| 179 close(sock->sd); | |
| 180 continue; | |
| 181 } | |
| 182 chmod(sock->path, 0777); | |
| 183 ret++; | |
| 184 } | |
| 185 return ret; | |
| 186 } | |
| 187 | |
| 188 /* | |
| 189 * creates a socket of family INET and protocol UDP | |
| 190 * if successful then returns SOCK othrwise error | |
| 191 */ | |
| 192 static int open_udp_socks(char *host, int port, struct sockaddr_in *sadd) | |
| 193 { | |
| 194 struct addrinfo *info, rp; | |
| 195 | |
| 196 memset(&rp, 0, sizeof(rp)); | |
| 197 rp.ai_family = AF_INET; | |
| 198 rp.ai_socktype = SOCK_DGRAM; | |
| 199 rp.ai_protocol = IPPROTO_UDP; | |
| 200 | |
| 201 if (getaddrinfo(host, NULL, &rp, &info) || !info) | |
| 202 perror_exit("BAD ADDRESS: can't find : %s ", host); | |
| 203 ((struct sockaddr_in*)info->ai_addr)->sin_port = htons(port); | |
| 204 memcpy(sadd, info->ai_addr, info->ai_addrlen); | |
| 205 freeaddrinfo(info); | |
| 206 | |
| 207 return xsocket(AF_INET, SOCK_DGRAM, IPPROTO_UDP); | |
| 208 } | |
| 209 | |
| 210 // Returns node having filename | |
| 211 static struct arg_list *get_file_node(char *filename, struct arg_list *list) | |
| 212 { | |
| 213 while (list) { | |
| 214 if (!strcmp(((logfile_t*) list->arg)->filename, filename)) return list; | |
| 215 list = list->next; | |
| 216 } | |
| 217 return list; | |
| 218 } | |
| 219 | |
| 220 /* | |
| 221 * recurses the logfile list and resolves config | |
| 222 * for evry file and updates facilty and log level bits. | |
| 223 */ | |
| 224 static int resolve_config(logfile_t *file) | |
| 225 { | |
| 226 char *tk, *fac, *lvl, *tmp, *nfac; | |
| 227 int count = 0; | |
| 228 unsigned facval = 0; | |
| 229 uint8_t set, levval, neg; | |
| 230 CODE *val = NULL; | |
| 231 | |
| 232 tmp = xstrdup(file->config); | |
| 233 for (tk = strtok(tmp, "; \0"); tk; tk = strtok(NULL, "; \0")) { | |
| 234 fac = tk; | |
| 235 tk = strchr(fac, '.'); | |
| 236 if (!tk) return -1; | |
| 237 *tk = '\0'; | |
| 238 lvl = tk + 1; | |
| 239 | |
| 240 while(1) { | |
| 241 count = 0; | |
| 242 if (*fac == '*') { | |
| 243 facval = 0xFFFFFFFF; | |
| 244 fac++; | |
| 245 } | |
| 246 nfac = strchr(fac, ','); | |
| 247 if (nfac) *nfac = '\0'; | |
| 248 while (*fac && ((CODE*) &facilitynames[count])->c_name) { | |
| 249 val = (CODE*) &facilitynames[count]; | |
| 250 if (!strcmp(fac, val->c_name)) { | |
| 251 facval |= (1<<LOG_FAC(val->c_val)); | |
| 252 break; | |
| 253 } | |
| 254 count++; | |
| 255 } | |
| 256 if (((CODE*) &facilitynames[count])->c_val == -1) | |
| 257 return -1; | |
| 258 | |
| 259 if (nfac) fac = nfac+1; | |
| 260 else break; | |
| 261 } | |
| 262 | |
| 263 count = 0; | |
| 264 set = 0; | |
| 265 levval = 0; | |
| 266 neg = 0; | |
| 267 if (*lvl == '!') { | |
| 268 neg = 1; | |
| 269 lvl++; | |
| 270 } | |
| 271 if (*lvl == '=') { | |
| 272 set = 1; | |
| 273 lvl++; | |
| 274 } | |
| 275 if (*lvl == '*') { | |
| 276 levval = 0xFF; | |
| 277 lvl++; | |
| 278 } | |
| 279 while (*lvl && ((CODE*) &prioritynames[count])->c_name) { | |
| 280 val = (CODE*) &prioritynames[count]; | |
| 281 if (!strcmp(lvl, val->c_name)) { | |
| 282 levval |= set ? LOG_MASK(val->c_val):LOG_UPTO(val->c_val); | |
| 283 if (neg) levval = ~levval; | |
| 284 break; | |
| 285 } | |
| 286 count++; | |
| 287 } | |
| 288 if (((CODE*) &prioritynames[count])->c_val == -1) return -1; | |
| 289 | |
| 290 count = 0; | |
| 291 set = levval; | |
| 292 while(set) { | |
| 293 if (set & 0x1) file->facility[count] |= facval; | |
| 294 set >>= 1; | |
| 295 count++; | |
| 296 } | |
| 297 for (count = 0; count < LOG_NFACILITIES; count++) { | |
| 298 if (facval & 0x1) file->level[count] |= levval; | |
| 299 facval >>= 1; | |
| 300 } | |
| 301 } | |
| 302 free(tmp); | |
| 303 | |
| 304 return 0; | |
| 305 } | |
| 306 | |
| 307 // Parse config file and update the log file list. | |
| 308 static int parse_config_file(void) | |
| 309 { | |
| 310 logfile_t *file; | |
| 311 FILE *fp = NULL; | |
| 312 char *confline = NULL, *tk = NULL, *tokens[2] = {NULL, NULL}; | |
| 313 int len, linelen, tcount, lineno = 0; | |
| 314 struct arg_list *node; | |
| 315 /* | |
| 316 * if -K then open only /dev/kmsg | |
| 317 * all other log files are neglected | |
| 318 * thus no need to open config either. | |
| 319 */ | |
| 320 if (flag_chk(FLAG_K)) { | |
| 321 node = xzalloc(sizeof(struct arg_list)); | |
| 322 file = xzalloc(sizeof(logfile_t)); | |
| 323 file->filename = "/dev/kmsg"; | |
| 324 file->config = "*.*"; | |
| 325 memset(file->level, 0xFF, sizeof(file->level)); | |
| 326 memset(file->facility, 0xFFFFFFFF, sizeof(file->facility)); | |
| 327 node->arg = (char*) file; | |
| 328 TT.lfiles = node; | |
| 329 return 0; | |
| 330 } | |
| 331 /* | |
| 332 * if -R then add remote host to log list | |
| 333 * if -L is not provided all other log | |
| 334 * files are neglected thus no need to | |
| 335 * open config either so just return. | |
| 336 */ | |
| 337 if (flag_chk(FLAG_R)) { | |
| 338 node = xzalloc(sizeof(struct arg_list)); | |
| 339 file = xzalloc(sizeof(logfile_t)); | |
| 340 file->filename = xmsprintf("@%s",TT.remote_log); | |
| 341 file->isNetwork = 1; | |
| 342 file->config = "*.*"; | |
| 343 memset(file->level, 0xFF, sizeof(file->level)); | |
| 344 memset(file->facility, 0xFFFFFFFF, sizeof(file->facility)); | |
| 345 node->arg = (char*) file; | |
| 346 TT.lfiles = node; | |
| 347 if (!flag_chk(FLAG_L))return 0; | |
| 348 } | |
| 349 /* | |
| 350 * Read config file and add logfiles to the list | |
| 351 * with their configuration. | |
| 352 */ | |
| 353 fp = fopen(TT.config_file, "r"); | |
| 354 if (!fp && flag_chk(FLAG_f)) | |
| 355 perror_exit("can't open '%s'", TT.config_file); | |
| 356 | |
| 357 for (len = 0, linelen = 0; fp;) { | |
| 358 len = getline(&confline, (size_t*) &linelen, fp); | |
| 359 if (len <= 0) break; | |
| 360 lineno++; | |
| 361 for (; *confline == ' '; confline++, len--) ; | |
| 362 if ((confline[0] == '#') || (confline[0] == '\n')) continue; | |
| 363 for (tcount = 0, tk = strtok(confline, " \t"); tk && (tcount < 2); tk = | |
| 364 strtok(NULL, " \t"), tcount++) { | |
| 365 if (tcount == 2) { | |
| 366 error_msg("error in '%s' at line %d", TT.config_file, lineno); | |
| 367 return -1; | |
| 368 } | |
| 369 tokens[tcount] = xstrdup(tk); | |
| 370 } | |
| 371 if (tcount <= 1 || tcount > 2) { | |
| 372 if (tokens[0]) free(tokens[0]); | |
| 373 error_msg("bad line %d: 1 tokens found, 2 needed", lineno); | |
| 374 return -1; | |
| 375 } | |
| 376 tk = (tokens[1] + (strlen(tokens[1]) - 1)); | |
| 377 if (*tk == '\n') *tk = '\0'; | |
| 378 if (*tokens[1] == '\0') { | |
| 379 error_msg("bad line %d: 1 tokens found, 2 needed", lineno); | |
| 380 return -1; | |
| 381 } | |
| 382 if (*tokens[1] == '*') goto loop_again; | |
| 383 | |
| 384 node = get_file_node(tokens[1], TT.lfiles); | |
| 385 if (!node) { | |
| 386 node = xzalloc(sizeof(struct arg_list)); | |
| 387 file = xzalloc(sizeof(logfile_t)); | |
| 388 file->config = xstrdup(tokens[0]); | |
| 389 if (resolve_config(file)==-1) { | |
| 390 error_msg("error in '%s' at line %d", TT.config_file, lineno); | |
| 391 return -1; | |
| 392 } | |
| 393 file->filename = xstrdup(tokens[1]); | |
| 394 if (*file->filename == '@') file->isNetwork = 1; | |
| 395 node->arg = (char*) file; | |
| 396 node->next = TT.lfiles; | |
| 397 TT.lfiles = node; | |
| 398 } else { | |
| 399 file = (logfile_t*) node->arg; | |
| 400 int rel = strlen(file->config) + strlen(tokens[0]) + 2; | |
| 401 file->config = xrealloc(file->config, rel); | |
| 402 sprintf(file->config, "%s;%s", file->config, tokens[0]); | |
| 403 } | |
| 404 loop_again: | |
| 405 if (tokens[0]) free(tokens[0]); | |
| 406 if (tokens[1]) free(tokens[1]); | |
| 407 free(confline); | |
| 408 confline = NULL; | |
| 409 } | |
| 410 /* | |
| 411 * Can't open config file or support is not enabled | |
| 412 * adding default logfile to the head of list. | |
| 413 */ | |
| 414 if (!fp){ | |
| 415 node = xzalloc(sizeof(struct arg_list)); | |
| 416 file = xzalloc(sizeof(logfile_t)); | |
| 417 file->filename = flag_get(FLAG_O, TT.logfile, "/var/log/messages"); //DEFLOGFILE | |
| 418 file->isNetwork = 0; | |
| 419 file->config = "*.*"; | |
| 420 memset(file->level, 0xFF, sizeof(file->level)); | |
| 421 memset(file->facility, 0xFFFFFFFF, sizeof(file->facility)); | |
| 422 node->arg = (char*) file; | |
| 423 node->next = TT.lfiles; | |
| 424 TT.lfiles = node; | |
| 425 } | |
| 426 if (fp) { | |
| 427 fclose(fp); | |
| 428 fp = NULL; | |
| 429 } | |
| 430 return 0; | |
| 431 } | |
| 432 | |
| 433 static int getport(char *str, char *filename) | |
| 434 { | |
| 435 char *endptr = NULL; | |
| 436 int base = 10; | |
| 437 errno = 0; | |
| 438 if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X')) { | |
| 439 base = 16; | |
| 440 str += 2; | |
| 441 } | |
| 442 long port = strtol(str, &endptr, base); | |
| 443 if (errno || *endptr!='\0'|| endptr == str | |
| 444 || port < 0 || port > 65535) error_exit("wrong port no in %s", filename); | |
| 445 return (int)port; | |
| 446 } | |
| 447 | |
| 448 // open every log file in list. | |
| 449 static void open_logfiles(void) | |
| 450 { | |
| 451 logfile_t *tfd; | |
| 452 char *p, *tmpfile; | |
| 453 int port = -1; | |
| 454 struct arg_list *node = TT.lfiles; | |
| 455 | |
| 456 while (node) { | |
| 457 tfd = (logfile_t*) node->arg; | |
| 458 if (tfd->isNetwork) { | |
| 459 tmpfile = xstrdup(tfd->filename +1); | |
| 460 if ((p = strchr(tmpfile, ':'))) { | |
| 461 *p = '\0'; | |
| 462 port = getport(p + 1, tfd->filename); | |
| 463 } | |
| 464 tfd->logfd = open_udp_socks(tmpfile, (port>=0)?port:514, &tfd->saddr); | |
| 465 free(tmpfile); | |
| 466 } else tfd->logfd = open(tfd->filename, O_CREAT | O_WRONLY | O_APPEND, 0666); | |
| 467 if (tfd->logfd < 0) { | |
| 468 tfd->filename = "/dev/console"; | |
| 469 tfd->logfd = open(tfd->filename, O_APPEND); | |
| 470 } | |
| 471 node = node->next; | |
| 472 } | |
| 473 } | |
| 474 | |
| 475 //write to file with rotation | |
| 476 static int write_rotate( logfile_t *tf, int len) | |
| 477 { | |
| 478 int size, isreg; | |
| 479 struct stat statf; | |
| 480 isreg = (!fstat(tf->logfd, &statf) && S_ISREG(statf.st_mode)); | |
| 481 size = statf.st_size; | |
| 482 | |
| 483 if (flag_chk(FLAG_s) || flag_chk(FLAG_b)) { | |
| 484 if (TT.rot_size && isreg && (size + len) > (TT.rot_size*1024)) { | |
| 485 if (TT.rot_count) { /* always 0..99 */ | |
| 486 int i = strlen(tf->filename) + 3 + 1; | |
| 487 char old_file[i]; | |
| 488 char new_file[i]; | |
| 489 i = TT.rot_count - 1; | |
| 490 while (1) { | |
| 491 sprintf(new_file, "%s.%d", tf->filename, i); | |
| 492 if (!i) break; | |
| 493 sprintf(old_file, "%s.%d", tf->filename, --i); | |
| 494 rename(old_file, new_file); | |
| 495 } | |
| 496 rename(tf->filename, new_file); | |
| 497 unlink(tf->filename); | |
| 498 close(tf->logfd); | |
| 499 tf->logfd = open(tf->filename, O_CREAT | O_WRONLY | O_APPEND, 0666); | |
| 500 } | |
| 501 ftruncate(tf->logfd, 0); | |
| 502 } | |
| 503 } | |
| 504 return write(tf->logfd, toybuf, len); | |
| 505 } | |
| 506 | |
| 507 //search the given name and return its value | |
| 508 static char *dec(int val, CODE *clist) | |
| 509 { | |
| 510 const CODE *c; | |
| 511 | |
| 512 for (c = clist; c->c_name; c++) | |
| 513 if (val == c->c_val) return c->c_name; | |
| 514 return itoa(val); | |
| 515 } | |
| 516 | |
| 517 // Compute priority from "facility.level" pair | |
| 518 static void priority_to_string(int pri, char **facstr, char **lvlstr) | |
| 519 { | |
| 520 int fac,lev; | |
| 521 | |
| 522 fac = LOG_FAC(pri); | |
| 523 lev = LOG_PRI(pri); | |
| 524 *facstr = dec(fac<<3, facilitynames); | |
| 525 *lvlstr = dec(lev, prioritynames); | |
| 526 } | |
| 527 | |
| 528 //Parse messege and write to file. | |
| 529 static void logmsg(char *msg, int len) | |
| 530 { | |
| 531 time_t now; | |
| 532 char *p, *ts, *lvlstr, *facstr; | |
| 533 struct utsname uts; | |
| 534 int pri = 0; | |
| 535 struct arg_list *lnode = TT.lfiles; | |
| 536 | |
| 537 char *omsg = msg; | |
| 538 int olen = len, fac, lvl; | |
| 539 | |
| 540 if (*msg == '<') { // Extract the priority no. | |
| 541 pri = (int) strtoul(msg + 1, &p, 10); | |
| 542 if (*p == '>') msg = p + 1; | |
| 543 } | |
| 544 /* Jan 18 00:11:22 msg... | |
| 545 * 01234567890123456 | |
| 546 */ | |
| 547 if (len < 16 || msg[3] != ' ' || msg[6] != ' ' || msg[9] != ':' | |
| 548 || msg[12] != ':' || msg[15] != ' ') { | |
| 549 time(&now); | |
| 550 ts = ctime(&now) + 4; /* skip day of week */ | |
| 551 } else { | |
| 552 now = 0; | |
| 553 ts = msg; | |
| 554 msg += 16; | |
| 555 } | |
| 556 ts[15] = '\0'; | |
| 557 fac = LOG_FAC(pri); | |
| 558 lvl = LOG_PRI(pri); | |
| 559 | |
| 560 if (flag_chk(FLAG_K)) { | |
| 561 len = sprintf(toybuf, "<%d> %s\n", pri, msg); | |
| 562 goto do_log; | |
| 563 } | |
| 564 priority_to_string(pri, &facstr, &lvlstr); | |
| 565 | |
| 566 p = "local"; | |
| 567 if (!uname(&uts)) p = uts.nodename; | |
| 568 if (flag_chk(FLAG_S)) len = sprintf(toybuf, "%s %s\n", ts, msg); | |
| 569 else len = sprintf(toybuf, "%s %s %s.%s %s\n", ts, p, facstr, lvlstr, msg); | |
| 570 | |
| 571 do_log: | |
| 572 if (lvl >= TT.log_prio) return; | |
| 573 | |
| 574 while (lnode) { | |
| 575 logfile_t *tf = (logfile_t*) lnode->arg; | |
| 576 if (tf->logfd > 0) { | |
| 577 if ((tf->facility[lvl] & (1 << fac)) && (tf->level[fac] & (1<<lvl))) { | |
| 578 int wlen; | |
| 579 if (tf->isNetwork) | |
| 580 wlen = sendto(tf->logfd, omsg, olen, 0, (struct sockaddr*)&tf->saddr, sizeof(tf->saddr)); | |
| 581 else wlen = write_rotate(tf, len); | |
| 582 if (wlen < 0) perror_msg("write failed file : %s ", (tf->isNetwork)?(tf->filename+1):tf->filename); | |
| 583 } | |
| 584 } | |
| 585 lnode = lnode->next; | |
| 586 } | |
| 587 } | |
| 588 | |
| 589 /* | |
| 590 * closes all read and write fds | |
| 591 * and frees all nodes and lists | |
| 592 */ | |
| 593 static void cleanup(void) | |
| 594 { | |
| 595 struct arg_list *fnode; | |
| 596 while (TT.lsocks) { | |
| 597 fnode = TT.lsocks; | |
| 598 if (((unsocks_t*) fnode->arg)->sd >= 0) | |
| 599 close(((unsocks_t*) fnode->arg)->sd); | |
| 600 free(fnode->arg); | |
| 601 TT.lsocks = fnode->next; | |
| 602 free(fnode); | |
| 603 } | |
| 604 unlink("/dev/log"); | |
| 605 | |
| 606 while (TT.lfiles) { | |
| 607 fnode = TT.lfiles; | |
| 608 if (((logfile_t*) fnode->arg)->logfd >= 0) | |
| 609 close(((logfile_t*) fnode->arg)->logfd); | |
| 610 free(fnode->arg); | |
| 611 TT.lfiles = fnode->next; | |
| 612 free(fnode); | |
| 613 } | |
| 614 } | |
| 615 | |
| 616 static void signal_handler(int sig) | |
| 617 { | |
| 618 unsigned char ch = sig; | |
| 619 if (write(sigfd.wr, &ch, 1) != 1) error_msg("can't send signal"); | |
| 620 } | |
| 621 | |
| 622 static void setup_signal() | |
| 623 { | |
| 624 if (pipe((int *)&sigfd) < 0) error_exit("pipe failed\n"); | |
| 625 | |
| 626 fcntl(sigfd.wr , F_SETFD, FD_CLOEXEC); | |
| 627 fcntl(sigfd.rd , F_SETFD, FD_CLOEXEC); | |
| 628 int flags = fcntl(sigfd.wr, F_GETFL); | |
| 629 fcntl(sigfd.wr, F_SETFL, flags | O_NONBLOCK); | |
| 630 signal(SIGHUP, signal_handler); | |
| 631 signal(SIGTERM, signal_handler); | |
| 632 signal(SIGINT, signal_handler); | |
| 633 signal(SIGQUIT, signal_handler); | |
| 634 } | |
| 635 | |
| 636 void syslogd_main(void) | |
| 637 { | |
| 638 unsocks_t *tsd; | |
| 639 int maxfd, retval, last_len=0; | |
| 640 struct timeval tv; | |
| 641 struct arg_list *node; | |
| 642 char *temp, *buffer = (toybuf +2048), *last_buf = (toybuf + 3072); //these two buffs are of 1K each | |
| 643 | |
| 644 if (flag_chk(FLAG_p) && strlen(TT.unix_socket) > 108) | |
| 645 error_exit("Socket path should not be more than 108"); | |
| 646 | |
| 647 TT.config_file = flag_get(FLAG_f, TT.config_file, "/etc/syslog.conf"); //DEFCONFFILE | |
| 648 init_jumpin: | |
| 649 TT.lsocks = xzalloc(sizeof(struct arg_list)); | |
| 650 tsd = xzalloc(sizeof(unsocks_t)); | |
| 651 | |
| 652 tsd->path = flag_get(FLAG_p, TT.unix_socket , "/dev/log"); // DEFLOGSOCK | |
| 653 TT.lsocks->arg = (char*) tsd; | |
| 654 | |
| 655 if (flag_chk(FLAG_a)) { | |
| 656 for (temp = strtok(TT.socket, ":"); temp; temp = strtok(NULL, ":")) { | |
| 657 struct arg_list *ltemp = xzalloc(sizeof(struct arg_list)); | |
| 658 if (strlen(temp) > 107) temp[108] = '\0'; | |
| 659 tsd = xzalloc(sizeof(unsocks_t)); | |
| 660 tsd->path = temp; | |
| 661 ltemp->arg = (char*) tsd; | |
| 662 ltemp->next = TT.lsocks; | |
| 663 TT.lsocks = ltemp; | |
| 664 } | |
| 665 } | |
| 666 if (!open_unix_socks()) { | |
| 667 error_msg("Can't open single socket for listenning."); | |
| 668 goto clean_and_exit; | |
| 669 } | |
| 670 setup_signal(); | |
| 671 if (parse_config_file() == -1) goto clean_and_exit; | |
| 672 open_logfiles(); | |
|
995
893c86bbe452
Add daemonize function to lib for klogd and syslogd
Felix Janda <felix.janda@posteo.de>
parents:
960
diff
changeset
|
673 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
|
674 //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
|
675 toys.optflags |= FLAG_n; |
|
893c86bbe452
Add daemonize function to lib for klogd and syslogd
Felix Janda <felix.janda@posteo.de>
parents:
960
diff
changeset
|
676 } |
| 960 | 677 { |
| 678 int pid_fd = open("/var/run/syslogd.pid", O_CREAT | O_WRONLY | O_TRUNC, 0666); | |
| 679 if (pid_fd > 0) { | |
| 680 unsigned pid = getpid(); | |
| 681 int len = sprintf(toybuf, "%u\n", pid); | |
| 682 write(pid_fd, toybuf, len); | |
| 683 close(pid_fd); | |
| 684 } | |
| 685 } | |
| 686 | |
| 687 logmsg("<46>Toybox: syslogd started", 27); //27 : the length of message | |
| 688 for (;;) { | |
| 689 maxfd = addrfds(); | |
| 690 tv.tv_usec = 0; | |
| 691 tv.tv_sec = TT.interval*60; | |
| 692 | |
| 693 retval = select(maxfd + 1, &TT.rfds, NULL, NULL, (TT.interval)?&tv:NULL); | |
| 694 if (retval < 0) { /* Some error. */ | |
| 695 if (errno == EINTR) continue; | |
| 696 perror_msg("Error in select "); | |
| 697 continue; | |
| 698 } | |
| 699 if (!retval) { /* Timed out */ | |
| 700 logmsg("<46>-- MARK --", 14); | |
| 701 continue; | |
| 702 } | |
| 703 if (FD_ISSET(sigfd.rd, &TT.rfds)) { /* May be a signal */ | |
| 704 unsigned char sig; | |
| 705 | |
| 706 if (read(sigfd.rd, &sig, 1) != 1) { | |
| 707 error_msg("signal read failed.\n"); | |
| 708 continue; | |
| 709 } | |
| 710 switch(sig) { | |
| 711 case SIGTERM: /* FALLTHROUGH */ | |
| 712 case SIGINT: /* FALLTHROUGH */ | |
| 713 case SIGQUIT: | |
| 714 logmsg("<46>syslogd exiting", 19); | |
| 715 if (CFG_TOYBOX_FREE ) cleanup(); | |
| 716 signal(sig, SIG_DFL); | |
| 717 sigset_t ss; | |
| 718 sigemptyset(&ss); | |
| 719 sigaddset(&ss, sig); | |
| 720 sigprocmask(SIG_UNBLOCK, &ss, NULL); | |
| 721 raise(sig); | |
| 722 _exit(1); /* Should not reach it */ | |
| 723 break; | |
| 724 case SIGHUP: | |
| 725 logmsg("<46>syslogd exiting", 19); | |
| 726 cleanup(); //cleanup is done, as we restart syslog. | |
| 727 goto init_jumpin; | |
| 728 default: break; | |
| 729 } | |
| 730 } | |
| 731 if (retval > 0) { /* Some activity on listen sockets. */ | |
| 732 node = TT.lsocks; | |
| 733 while (node) { | |
| 734 int sd = ((unsocks_t*) node->arg)->sd; | |
| 735 if (FD_ISSET(sd, &TT.rfds)) { | |
| 736 int len = read(sd, buffer, 1023); //buffer is of 1K, hence readingonly 1023 bytes, 1 for NUL | |
| 737 if (len > 0) { | |
| 738 buffer[len] = '\0'; | |
| 739 if(flag_chk(FLAG_D) && (len == last_len)) | |
| 740 if (!memcmp(last_buf, buffer, len)) break; | |
| 741 | |
| 742 memcpy(last_buf, buffer, len); | |
| 743 last_len = len; | |
| 744 logmsg(buffer, len); | |
| 745 } | |
| 746 break; | |
| 747 } | |
| 748 node = node->next; | |
| 749 } | |
| 750 } | |
| 751 } | |
| 752 clean_and_exit: | |
| 753 logmsg("<46>syslogd exiting", 19); | |
| 754 if (CFG_TOYBOX_FREE ) cleanup(); | |
| 755 } |