sysklogd/syslogd.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini syslogd implementation for busybox
   4  *
   5  * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
   6  *
   7  * Copyright (C) 2000 by Karl M. Hegbloom <karlheg@debian.org>
   8  *
   9  * "circular buffer" Copyright (C) 2001 by Gennady Feldman <gfeldman@gena01.com>
  10  *
  11  * Maintainer: Gennady Feldman <gfeldman@gena01.com> as of Mar 12, 2001
  12  *
  13  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  14  */
  15 //config:config SYSLOGD
  16 //config:       bool "syslogd"
  17 //config:       default y
  18 //config:       help
  19 //config:         The syslogd utility is used to record logs of all the
  20 //config:         significant events that occur on a system. Every
  21 //config:         message that is logged records the date and time of the
  22 //config:         event, and will generally also record the name of the
  23 //config:         application that generated the message. When used in
  24 //config:         conjunction with klogd, messages from the Linux kernel
  25 //config:         can also be recorded. This is terribly useful,
  26 //config:         especially for finding what happened when something goes
  27 //config:         wrong. And something almost always will go wrong if
  28 //config:         you wait long enough....
  29 //config:
  30 //config:config FEATURE_ROTATE_LOGFILE
  31 //config:       bool "Rotate message files"
  32 //config:       default y
  33 //config:       depends on SYSLOGD
  34 //config:       help
  35 //config:         This enables syslogd to rotate the message files
  36 //config:         on his own. No need to use an external rotatescript.
  37 //config:
  38 //config:config FEATURE_REMOTE_LOG
  39 //config:       bool "Remote Log support"
  40 //config:       default y
  41 //config:       depends on SYSLOGD
  42 //config:       help
  43 //config:         When you enable this feature, the syslogd utility can
  44 //config:         be used to send system log messages to another system
  45 //config:         connected via a network. This allows the remote
  46 //config:         machine to log all the system messages, which can be
  47 //config:         terribly useful for reducing the number of serial
  48 //config:         cables you use. It can also be a very good security
  49 //config:         measure to prevent system logs from being tampered with
  50 //config:         by an intruder.
  51 //config:
  52 //config:config FEATURE_SYSLOGD_DUP
  53 //config:       bool "Support -D (drop dups) option"
  54 //config:       default y
  55 //config:       depends on SYSLOGD
  56 //config:       help
  57 //config:         Option -D instructs syslogd to drop consecutive messages
  58 //config:         which are totally the same.
  59 //config:
  60 //config:config FEATURE_SYSLOGD_CFG
  61 //config:       bool "Support syslog.conf"
  62 //config:       default y
  63 //config:       depends on SYSLOGD
  64 //config:       help
  65 //config:         Supports restricted syslogd config. See docs/syslog.conf.txt
  66 //config:
  67 //config:config FEATURE_SYSLOGD_READ_BUFFER_SIZE
  68 //config:       int "Read buffer size in bytes"
  69 //config:       default 256
  70 //config:       range 256 20000
  71 //config:       depends on SYSLOGD
  72 //config:       help
  73 //config:         This option sets the size of the syslog read buffer.
  74 //config:         Actual memory usage increases around five times the
  75 //config:         change done here.
  76 //config:
  77 //config:config FEATURE_IPC_SYSLOG
  78 //config:       bool "Circular Buffer support"
  79 //config:       default y
  80 //config:       depends on SYSLOGD
  81 //config:       help
  82 //config:         When you enable this feature, the syslogd utility will
  83 //config:         use a circular buffer to record system log messages.
  84 //config:         When the buffer is filled it will continue to overwrite
  85 //config:         the oldest messages. This can be very useful for
  86 //config:         systems with little or no permanent storage, since
  87 //config:         otherwise system logs can eventually fill up your
  88 //config:         entire filesystem, which may cause your system to
  89 //config:         break badly.
  90 //config:
  91 //config:config FEATURE_IPC_SYSLOG_BUFFER_SIZE
  92 //config:       int "Circular buffer size in Kbytes (minimum 4KB)"
  93 //config:       default 16
  94 //config:       range 4 2147483647
  95 //config:       depends on FEATURE_IPC_SYSLOG
  96 //config:       help
  97 //config:         This option sets the size of the circular buffer
  98 //config:         used to record system log messages.
  99 //config:
 100 //config:config FEATURE_KMSG_SYSLOG
 101 //config:       bool "Linux kernel printk buffer support"
 102 //config:       default y
 103 //config:       depends on SYSLOGD
 104 //config:       select PLATFORM_LINUX
 105 //config:       help
 106 //config:         When you enable this feature, the syslogd utility will
 107 //config:         write system log message to the Linux kernel's printk buffer.
 108 //config:         This can be used as a smaller alternative to the syslogd IPC
 109 //config:         support, as klogd and logread aren't needed.
 110 //config:
 111 //config:         NOTICE: Syslog facilities in log entries needs kernel 3.5+.
 112
 113 //applet:IF_SYSLOGD(APPLET(syslogd, BB_DIR_SBIN, BB_SUID_DROP))
 114
 115 //kbuild:lib-$(CONFIG_SYSLOGD) += syslogd_and_logger.o
 116
 117 //usage:#define syslogd_trivial_usage
 118 //usage:       "[OPTIONS]"
 119 //usage:#define syslogd_full_usage "\n\n"
 120 //usage:       "System logging utility\n"
 121 //usage:        IF_NOT_FEATURE_SYSLOGD_CFG(
 122 //usage:       "(this version of syslogd ignores /etc/syslog.conf)\n"
 123 //usage:        )
 124 //usage:     "\n        -n              Run in foreground"
 125 //usage:        IF_FEATURE_REMOTE_LOG(
 126 //usage:     "\n        -R HOST[:PORT]  Log to HOST:PORT (default PORT:514)"
 127 //usage:     "\n        -L              Log locally and via network (default is network only if -R)"
 128 //usage:        )
 129 //usage:        IF_FEATURE_IPC_SYSLOG(
 130 /* NB: -Csize shouldn't have space (because size is optional) */
 131 //usage:     "\n        -C[size_kb]     Log to shared mem buffer (use logread to read it)"
 132 //usage:        )
 133 //usage:        IF_FEATURE_KMSG_SYSLOG(
 134 //usage:     "\n        -K              Log to kernel printk buffer (use dmesg to read it)"
 135 //usage:        )
 136 //usage:     "\n        -O FILE         Log to FILE (default:/var/log/messages, stdout if -)"
 137 //usage:        IF_FEATURE_ROTATE_LOGFILE(
 138 //usage:     "\n        -s SIZE         Max size (KB) before rotation (default:200KB, 0=off)"
 139 //usage:     "\n        -b N            N rotated logs to keep (default:1, max=99, 0=purge)"
 140 //usage:        )
 141 //usage:     "\n        -l N            Log only messages more urgent than prio N (1-8)"
 142 //usage:     "\n        -S              Smaller output"
 143 //usage:        IF_FEATURE_SYSLOGD_DUP(
 144 //usage:     "\n        -D              Drop duplicates"
 145 //usage:        )
 146 //usage:        IF_FEATURE_SYSLOGD_CFG(
 147 //usage:     "\n        -f FILE         Use FILE as config (default:/etc/syslog.conf)"
 148 //usage:        )
 149 /* //usage:  "\n        -m MIN          Minutes between MARK lines (default:20, 0=off)" */
 150 //usage:
 151 //usage:#define syslogd_example_usage
 152 //usage:       "$ syslogd -R masterlog:514\n"
 153 //usage:       "$ syslogd -R 192.168.1.1:601\n"
 154
 155 /*
 156  * Done in syslogd_and_logger.c:
 157 #include "libbb.h"
 158 #define SYSLOG_NAMES
 159 #define SYSLOG_NAMES_CONST
 160 #include <syslog.h>
 161 */
 162 #ifndef _PATH_LOG
 163 #define _PATH_LOG       "/dev/log"
 164 #endif
 165
 166 #include <sys/un.h>
 167 #include <sys/uio.h>
 168
 169 #if ENABLE_FEATURE_REMOTE_LOG
 170 #include <netinet/in.h>
 171 #endif
 172
 173 #if ENABLE_FEATURE_IPC_SYSLOG
 174 #include <sys/ipc.h>
 175 #include <sys/sem.h>
 176 #include <sys/shm.h>
 177 #endif
 178
 179
 180 #define DEBUG 0
 181
 182 /* MARK code is not very useful, is bloat, and broken:
 183  * can deadlock if alarmed to make MARK while writing to IPC buffer
 184  * (semaphores are down but do_mark routine tries to down them again) */
 185 #undef SYSLOGD_MARK
 186
 187 /* Write locking does not seem to be useful either */
 188 #undef SYSLOGD_WRLOCK
 189
 190 enum {
 191         MAX_READ = CONFIG_FEATURE_SYSLOGD_READ_BUFFER_SIZE,
 192         DNS_WAIT_SEC = 2 * 60,
 193 };
 194
 195 /* Semaphore operation structures */
 196 struct shbuf_ds {
 197         int32_t size;   /* size of data - 1 */
 198         int32_t tail;   /* end of message list */
 199         char data[1];   /* data/messages */
 200 };
 201
 202 #if ENABLE_FEATURE_REMOTE_LOG
 203 typedef struct {
 204         int remoteFD;
 205         unsigned last_dns_resolve;
 206         len_and_sockaddr *remoteAddr;
 207         const char *remoteHostname;
 208 } remoteHost_t;
 209 #endif
 210
 211 typedef struct logFile_t {
 212         const char *path;
 213         int fd;
 214         time_t last_log_time;
 215 #if ENABLE_FEATURE_ROTATE_LOGFILE
 216         unsigned size;
 217         uint8_t isRegular;
 218 #endif
 219 } logFile_t;
 220
 221 #if ENABLE_FEATURE_SYSLOGD_CFG
 222 typedef struct logRule_t {
 223         uint8_t enabled_facility_priomap[LOG_NFACILITIES];
 224         struct logFile_t *file;
 225         struct logRule_t *next;
 226 } logRule_t;
 227 #endif
 228
 229 /* Allows us to have smaller initializer. Ugly. */
 230 #define GLOBALS \
 231         logFile_t logFile;                      \
 232         /* interval between marks in seconds */ \
 233         /*int markInterval;*/                   \
 234         /* level of messages to be logged */    \
 235         int logLevel;                           \
 236 IF_FEATURE_ROTATE_LOGFILE( \
 237         /* max size of file before rotation */  \
 238         unsigned logFileSize;                   \
 239         /* number of rotated message files */   \
 240         unsigned logFileRotate;                 \
 241 ) \
 242 IF_FEATURE_IPC_SYSLOG( \
 243         int shmid; /* ipc shared memory id */   \
 244         int s_semid; /* ipc semaphore id */     \
 245         int shm_size;                           \
 246         struct sembuf SMwup[1];                 \
 247         struct sembuf SMwdn[3];                 \
 248 ) \
 249 IF_FEATURE_SYSLOGD_CFG( \
 250         logRule_t *log_rules; \
 251 ) \
 252 IF_FEATURE_KMSG_SYSLOG( \
 253         int kmsgfd; \
 254         int primask; \
 255 )
 256
 257 struct init_globals {
 258         GLOBALS
 259 };
 260
 261 struct globals {
 262         GLOBALS
 263
 264 #if ENABLE_FEATURE_REMOTE_LOG
 265         llist_t *remoteHosts;
 266 #endif
 267 #if ENABLE_FEATURE_IPC_SYSLOG
 268         struct shbuf_ds *shbuf;
 269 #endif
 270         /* localhost's name. We print only first 64 chars */
 271         char *hostname;
 272
 273         /* We recv into recvbuf... */
 274         char recvbuf[MAX_READ * (1 + ENABLE_FEATURE_SYSLOGD_DUP)];
 275         /* ...then copy to parsebuf, escaping control chars */
 276         /* (can grow x2 max) */
 277         char parsebuf[MAX_READ*2];
 278         /* ...then sprintf into printbuf, adding timestamp (15 chars),
 279          * host (64), fac.prio (20) to the message */
 280         /* (growth by: 15 + 64 + 20 + delims = ~110) */
 281         char printbuf[MAX_READ*2 + 128];
 282 };
 283
 284 static const struct init_globals init_data = {
 285         .logFile = {
 286                 .path = "/var/log/messages",
 287                 .fd = -1,
 288         },
 289 #ifdef SYSLOGD_MARK
 290         .markInterval = 20 * 60,
 291 #endif
 292         .logLevel = 8,
 293 #if ENABLE_FEATURE_ROTATE_LOGFILE
 294         .logFileSize = 200 * 1024,
 295         .logFileRotate = 1,
 296 #endif
 297 #if ENABLE_FEATURE_IPC_SYSLOG
 298         .shmid = -1,
 299         .s_semid = -1,
 300         .shm_size = ((CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE)*1024), /* default shm size */
 301         .SMwup = { {1, -1, IPC_NOWAIT} },
 302         .SMwdn = { {0, 0}, {1, 0}, {1, +1} },
 303 #endif
 304 };
 305
 306 #define G (*ptr_to_globals)
 307 #define INIT_G() do { \
 308         SET_PTR_TO_GLOBALS(memcpy(xzalloc(sizeof(G)), &init_data, sizeof(init_data))); \
 309 } while (0)
 310
 311
 312 /* Options */
 313 enum {
 314         OPTBIT_mark = 0, // -m
 315         OPTBIT_nofork, // -n
 316         OPTBIT_outfile, // -O
 317         OPTBIT_loglevel, // -l
 318         OPTBIT_small, // -S
 319         IF_FEATURE_ROTATE_LOGFILE(OPTBIT_filesize   ,)  // -s
 320         IF_FEATURE_ROTATE_LOGFILE(OPTBIT_rotatecnt  ,)  // -b
 321         IF_FEATURE_REMOTE_LOG(    OPTBIT_remotelog  ,)  // -R
 322         IF_FEATURE_REMOTE_LOG(    OPTBIT_locallog   ,)  // -L
 323         IF_FEATURE_IPC_SYSLOG(    OPTBIT_circularlog,)  // -C
 324         IF_FEATURE_SYSLOGD_DUP(   OPTBIT_dup        ,)  // -D
 325         IF_FEATURE_SYSLOGD_CFG(   OPTBIT_cfg        ,)  // -f
 326         IF_FEATURE_KMSG_SYSLOG(   OPTBIT_kmsg       ,)  // -K
 327
 328         OPT_mark        = 1 << OPTBIT_mark    ,
 329         OPT_nofork      = 1 << OPTBIT_nofork  ,
 330         OPT_outfile     = 1 << OPTBIT_outfile ,
 331         OPT_loglevel    = 1 << OPTBIT_loglevel,
 332         OPT_small       = 1 << OPTBIT_small   ,
 333         OPT_filesize    = IF_FEATURE_ROTATE_LOGFILE((1 << OPTBIT_filesize   )) + 0,
 334         OPT_rotatecnt   = IF_FEATURE_ROTATE_LOGFILE((1 << OPTBIT_rotatecnt  )) + 0,
 335         OPT_remotelog   = IF_FEATURE_REMOTE_LOG(    (1 << OPTBIT_remotelog  )) + 0,
 336         OPT_locallog    = IF_FEATURE_REMOTE_LOG(    (1 << OPTBIT_locallog   )) + 0,
 337         OPT_circularlog = IF_FEATURE_IPC_SYSLOG(    (1 << OPTBIT_circularlog)) + 0,
 338         OPT_dup         = IF_FEATURE_SYSLOGD_DUP(   (1 << OPTBIT_dup        )) + 0,
 339         OPT_cfg         = IF_FEATURE_SYSLOGD_CFG(   (1 << OPTBIT_cfg        )) + 0,
 340         OPT_kmsg        = IF_FEATURE_KMSG_SYSLOG(   (1 << OPTBIT_kmsg       )) + 0,
 341 };
 342 #define OPTION_STR "m:nO:l:S" \
 343         IF_FEATURE_ROTATE_LOGFILE("s:" ) \
 344         IF_FEATURE_ROTATE_LOGFILE("b:" ) \
 345         IF_FEATURE_REMOTE_LOG(    "R:" ) \
 346         IF_FEATURE_REMOTE_LOG(    "L"  ) \
 347         IF_FEATURE_IPC_SYSLOG(    "C::") \
 348         IF_FEATURE_SYSLOGD_DUP(   "D"  ) \
 349         IF_FEATURE_SYSLOGD_CFG(   "f:" ) \
 350         IF_FEATURE_KMSG_SYSLOG(   "K"  )
 351 #define OPTION_DECL *opt_m, *opt_l \
 352         IF_FEATURE_ROTATE_LOGFILE(,*opt_s) \
 353         IF_FEATURE_ROTATE_LOGFILE(,*opt_b) \
 354         IF_FEATURE_IPC_SYSLOG(    ,*opt_C = NULL) \
 355         IF_FEATURE_SYSLOGD_CFG(   ,*opt_f = NULL)
 356 #define OPTION_PARAM &opt_m, &(G.logFile.path), &opt_l \
 357         IF_FEATURE_ROTATE_LOGFILE(,&opt_s) \
 358         IF_FEATURE_ROTATE_LOGFILE(,&opt_b) \
 359         IF_FEATURE_REMOTE_LOG(    ,&remoteAddrList) \
 360         IF_FEATURE_IPC_SYSLOG(    ,&opt_C) \
 361         IF_FEATURE_SYSLOGD_CFG(   ,&opt_f)
 362
 363
 364 #if ENABLE_FEATURE_SYSLOGD_CFG
 365 static const CODE* find_by_name(char *name, const CODE* c_set)
 366 {
 367         for (; c_set->c_name; c_set++) {
 368                 if (strcmp(name, c_set->c_name) == 0)
 369                         return c_set;
 370         }
 371         return NULL;
 372 }
 373 #endif
 374 static const CODE* find_by_val(int val, const CODE* c_set)
 375 {
 376         for (; c_set->c_name; c_set++) {
 377                 if (c_set->c_val == val)
 378                         return c_set;
 379         }
 380         return NULL;
 381 }
 382
 383 #if ENABLE_FEATURE_SYSLOGD_CFG
 384 static void parse_syslogdcfg(const char *file)
 385 {
 386         char *t;
 387         logRule_t **pp_rule;
 388         /* tok[0] set of selectors */
 389         /* tok[1] file name */
 390         /* tok[2] has to be NULL */
 391         char *tok[3];
 392         parser_t *parser;
 393
 394         parser = config_open2(file ? file : "/etc/syslog.conf",
 395                                 file ? xfopen_for_read : fopen_for_read);
 396         if (!parser)
 397                 /* didn't find default /etc/syslog.conf */
 398                 /* proceed as if we built busybox without config support */
 399                 return;
 400
 401         /* use ptr to ptr to avoid checking whether head was initialized */
 402         pp_rule = &G.log_rules;
 403         /* iterate through lines of config, skipping comments */
 404         while (config_read(parser, tok, 3, 2, "# \t", PARSE_NORMAL | PARSE_MIN_DIE)) {
 405                 char *cur_selector;
 406                 logRule_t *cur_rule;
 407
 408                 /* unexpected trailing token? */
 409                 if (tok[2])
 410                         goto cfgerr;
 411
 412                 cur_rule = *pp_rule = xzalloc(sizeof(*cur_rule));
 413
 414                 cur_selector = tok[0];
 415                 /* iterate through selectors: "kern.info;kern.!err;..." */
 416                 do {
 417                         const CODE *code;
 418                         char *next_selector;
 419                         uint8_t negated_prio; /* "kern.!err" */
 420                         uint8_t single_prio;  /* "kern.=err" */
 421                         uint32_t facmap; /* bitmap of enabled facilities */
 422                         uint8_t primap;  /* bitmap of enabled priorities */
 423                         unsigned i;
 424
 425                         next_selector = strchr(cur_selector, ';');
 426                         if (next_selector)
 427                                 *next_selector++ = '\0';
 428
 429                         t = strchr(cur_selector, '.');
 430                         if (!t)
 431                                 goto cfgerr;
 432                         *t++ = '\0'; /* separate facility from priority */
 433
 434                         negated_prio = 0;
 435                         single_prio = 0;
 436                         if (*t == '!') {
 437                                 negated_prio = 1;
 438                                 ++t;
 439                         }
 440                         if (*t == '=') {
 441                                 single_prio = 1;
 442                                 ++t;
 443                         }
 444
 445                         /* parse priority */
 446                         if (*t == '*')
 447                                 primap = 0xff; /* all 8 log levels enabled */
 448                         else {
 449                                 uint8_t priority;
 450                                 code = find_by_name(t, prioritynames);
 451                                 if (!code)
 452                                         goto cfgerr;
 453                                 primap = 0;
 454                                 priority = code->c_val;
 455                                 if (priority == INTERNAL_NOPRI) {
 456                                         /* ensure we take "enabled_facility_priomap[fac] &= 0" branch below */
 457                                         negated_prio = 1;
 458                                 } else {
 459                                         priority = 1 << priority;
 460                                         do {
 461                                                 primap |= priority;
 462                                                 if (single_prio)
 463                                                         break;
 464                                                 priority >>= 1;
 465                                         } while (priority);
 466                                         if (negated_prio)
 467                                                 primap = ~primap;
 468                                 }
 469                         }
 470
 471                         /* parse facility */
 472                         if (*cur_selector == '*')
 473                                 facmap = (1<<LOG_NFACILITIES) - 1;
 474                         else {
 475                                 char *next_facility;
 476                                 facmap = 0;
 477                                 t = cur_selector;
 478                                 /* iterate through facilities: "kern,daemon.<priospec>" */
 479                                 do {
 480                                         next_facility = strchr(t, ',');
 481                                         if (next_facility)
 482                                                 *next_facility++ = '\0';
 483                                         code = find_by_name(t, facilitynames);
 484                                         if (!code)
 485                                                 goto cfgerr;
 486                                         /* "mark" is not a real facility, skip it */
 487                                         if (code->c_val != INTERNAL_MARK)
 488                                                 facmap |= 1<<(LOG_FAC(code->c_val));
 489                                         t = next_facility;
 490                                 } while (t);
 491                         }
 492
 493                         /* merge result with previous selectors */
 494                         for (i = 0; i < LOG_NFACILITIES; ++i) {
 495                                 if (!(facmap & (1<<i)))
 496                                         continue;
 497                                 if (negated_prio)
 498                                         cur_rule->enabled_facility_priomap[i] &= primap;
 499                                 else
 500                                         cur_rule->enabled_facility_priomap[i] |= primap;
 501                         }
 502
 503                         cur_selector = next_selector;
 504                 } while (cur_selector);
 505
 506                 /* check whether current file name was mentioned in previous rules or
 507                  * as global logfile (G.logFile).
 508                  */
 509                 if (strcmp(G.logFile.path, tok[1]) == 0) {
 510                         cur_rule->file = &G.logFile;
 511                         goto found;
 512                 }
 513                 /* temporarily use cur_rule as iterator, but *pp_rule still points
 514                  * to currently processing rule entry.
 515                  * NOTE: *pp_rule points to the current (and last in the list) rule.
 516                  */
 517                 for (cur_rule = G.log_rules; cur_rule != *pp_rule; cur_rule = cur_rule->next) {
 518                         if (strcmp(cur_rule->file->path, tok[1]) == 0) {
 519                                 /* found - reuse the same file structure */
 520                                 (*pp_rule)->file = cur_rule->file;
 521                                 cur_rule = *pp_rule;
 522                                 goto found;
 523                         }
 524                 }
 525                 cur_rule->file = xzalloc(sizeof(*cur_rule->file));
 526                 cur_rule->file->fd = -1;
 527                 cur_rule->file->path = xstrdup(tok[1]);
 528  found:
 529                 pp_rule = &cur_rule->next;
 530         }
 531         config_close(parser);
 532         return;
 533
 534  cfgerr:
 535         bb_error_msg_and_die("error in '%s' at line %d",
 536                         file ? file : "/etc/syslog.conf",
 537                         parser->lineno);
 538 }
 539 #endif
 540
 541 /* circular buffer variables/structures */
 542 #if ENABLE_FEATURE_IPC_SYSLOG
 543
 544 #if CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE < 4
 545 #error Sorry, you must set the syslogd buffer size to at least 4KB.
 546 #error Please check CONFIG_FEATURE_IPC_SYSLOG_BUFFER_SIZE
 547 #endif
 548
 549 /* our shared key (syslogd.c and logread.c must be in sync) */
 550 enum { KEY_ID = 0x414e4547 }; /* "GENA" */
 551
 552 static void ipcsyslog_cleanup(void)
 553 {
 554         if (G.shmid != -1) {
 555                 shmdt(G.shbuf);
 556         }
 557         if (G.shmid != -1) {
 558                 shmctl(G.shmid, IPC_RMID, NULL);
 559         }
 560         if (G.s_semid != -1) {
 561                 semctl(G.s_semid, 0, IPC_RMID, 0);
 562         }
 563 }
 564
 565 static void ipcsyslog_init(void)
 566 {
 567         if (DEBUG)
 568                 printf("shmget(%x, %d,...)\n", (int)KEY_ID, G.shm_size);
 569
 570         G.shmid = shmget(KEY_ID, G.shm_size, IPC_CREAT | 0644);
 571         if (G.shmid == -1) {
 572                 bb_perror_msg_and_die("shmget");
 573         }
 574
 575         G.shbuf = shmat(G.shmid, NULL, 0);
 576         if (G.shbuf == (void*) -1L) { /* shmat has bizarre error return */
 577                 bb_perror_msg_and_die("shmat");
 578         }
 579
 580         memset(G.shbuf, 0, G.shm_size);
 581         G.shbuf->size = G.shm_size - offsetof(struct shbuf_ds, data) - 1;
 582         /*G.shbuf->tail = 0;*/
 583
 584         /* we'll trust the OS to set initial semval to 0 (let's hope) */
 585         G.s_semid = semget(KEY_ID, 2, IPC_CREAT | IPC_EXCL | 1023);
 586         if (G.s_semid == -1) {
 587                 if (errno == EEXIST) {
 588                         G.s_semid = semget(KEY_ID, 2, 0);
 589                         if (G.s_semid != -1)
 590                                 return;
 591                 }
 592                 bb_perror_msg_and_die("semget");
 593         }
 594 }
 595
 596 /* Write message to shared mem buffer */
 597 static void log_to_shmem(const char *msg)
 598 {
 599         int old_tail, new_tail;
 600         int len;
 601
 602         if (semop(G.s_semid, G.SMwdn, 3) == -1) {
 603                 bb_perror_msg_and_die("SMwdn");
 604         }
 605
 606         /* Circular Buffer Algorithm:
 607          * --------------------------
 608          * tail == position where to store next syslog message.
 609          * tail's max value is (shbuf->size - 1)
 610          * Last byte of buffer is never used and remains NUL.
 611          */
 612         len = strlen(msg) + 1; /* length with NUL included */
 613  again:
 614         old_tail = G.shbuf->tail;
 615         new_tail = old_tail + len;
 616         if (new_tail < G.shbuf->size) {
 617                 /* store message, set new tail */
 618                 memcpy(G.shbuf->data + old_tail, msg, len);
 619                 G.shbuf->tail = new_tail;
 620         } else {
 621                 /* k == available buffer space ahead of old tail */
 622                 int k = G.shbuf->size - old_tail;
 623                 /* copy what fits to the end of buffer, and repeat */
 624                 memcpy(G.shbuf->data + old_tail, msg, k);
 625                 msg += k;
 626                 len -= k;
 627                 G.shbuf->tail = 0;
 628                 goto again;
 629         }
 630         if (semop(G.s_semid, G.SMwup, 1) == -1) {
 631                 bb_perror_msg_and_die("SMwup");
 632         }
 633         if (DEBUG)
 634                 printf("tail:%d\n", G.shbuf->tail);
 635 }
 636 #else
 637 static void ipcsyslog_cleanup(void) {}
 638 static void ipcsyslog_init(void) {}
 639 void log_to_shmem(const char *msg);
 640 #endif /* FEATURE_IPC_SYSLOG */
 641
 642 #if ENABLE_FEATURE_KMSG_SYSLOG
 643 static void kmsg_init(void)
 644 {
 645         G.kmsgfd = xopen("/dev/kmsg", O_WRONLY);
 646
 647         /*
 648          * kernel < 3.5 expects single char printk KERN_* priority prefix,
 649          * from 3.5 onwards the full syslog facility/priority format is supported
 650          */
 651         if (get_linux_version_code() < KERNEL_VERSION(3,5,0))
 652                 G.primask = LOG_PRIMASK;
 653         else
 654                 G.primask = -1;
 655 }
 656
 657 static void kmsg_cleanup(void)
 658 {
 659         if (ENABLE_FEATURE_CLEAN_UP)
 660                 close(G.kmsgfd);
 661 }
 662
 663 /* Write message to /dev/kmsg */
 664 static void log_to_kmsg(int pri, const char *msg)
 665 {
 666         /*
 667          * kernel < 3.5 expects single char printk KERN_* priority prefix,
 668          * from 3.5 onwards the full syslog facility/priority format is supported
 669          */
 670         pri &= G.primask;
 671
 672         full_write(G.kmsgfd, G.printbuf, sprintf(G.printbuf, "<%d>%s\n", pri, msg));
 673 }
 674 #else
 675 static void kmsg_init(void) {}
 676 static void kmsg_cleanup(void) {}
 677 static void log_to_kmsg(int pri UNUSED_PARAM, const char *msg UNUSED_PARAM) {}
 678 #endif /* FEATURE_KMSG_SYSLOG */
 679
 680 /* Print a message to the log file. */
 681 static void log_locally(time_t now, char *msg, logFile_t *log_file)
 682 {
 683 #ifdef SYSLOGD_WRLOCK
 684         struct flock fl;
 685 #endif
 686         int len = strlen(msg);
 687
 688         /* fd can't be 0 (we connect fd 0 to /dev/log socket) */
 689         /* fd is 1 if "-O -" is in use */
 690         if (log_file->fd > 1) {
 691                 /* Reopen log files every second. This allows admin
 692                  * to delete the files and not worry about restarting us.
 693                  * This costs almost nothing since it happens
 694                  * _at most_ once a second for each file, and happens
 695                  * only when each file is actually written.
 696                  */
 697                 if (!now)
 698                         now = time(NULL);
 699                 if (log_file->last_log_time != now) {
 700                         log_file->last_log_time = now;
 701                         close(log_file->fd);
 702                         goto reopen;
 703                 }
 704         }
 705         else if (log_file->fd == 1) {
 706                 /* We are logging to stdout: do nothing */
 707         }
 708         else {
 709                 if (LONE_DASH(log_file->path)) {
 710                         log_file->fd = 1;
 711                         /* log_file->isRegular = 0; - already is */
 712                 } else {
 713  reopen:
 714                         log_file->fd = open(log_file->path, O_WRONLY | O_CREAT
 715                                         | O_NOCTTY | O_APPEND | O_NONBLOCK,
 716                                         0666);
 717                         if (log_file->fd < 0) {
 718                                 /* cannot open logfile? - print to /dev/console then */
 719                                 int fd = device_open(DEV_CONSOLE, O_WRONLY | O_NOCTTY | O_NONBLOCK);
 720                                 if (fd < 0)
 721                                         fd = 2; /* then stderr, dammit */
 722                                 full_write(fd, msg, len);
 723                                 if (fd != 2)
 724                                         close(fd);
 725                                 return;
 726                         }
 727 #if ENABLE_FEATURE_ROTATE_LOGFILE
 728                         {
 729                                 struct stat statf;
 730                                 log_file->isRegular = (fstat(log_file->fd, &statf) == 0 && S_ISREG(statf.st_mode));
 731                                 /* bug (mostly harmless): can wrap around if file > 4gb */
 732                                 log_file->size = statf.st_size;
 733                         }
 734 #endif
 735                 }
 736         }
 737
 738 #ifdef SYSLOGD_WRLOCK
 739         fl.l_whence = SEEK_SET;
 740         fl.l_start = 0;
 741         fl.l_len = 1;
 742         fl.l_type = F_WRLCK;
 743         fcntl(log_file->fd, F_SETLKW, &fl);
 744 #endif
 745
 746 #if ENABLE_FEATURE_ROTATE_LOGFILE
 747         if (G.logFileSize && log_file->isRegular && log_file->size > G.logFileSize) {
 748                 if (G.logFileRotate) { /* always 0..99 */
 749                         int i = strlen(log_file->path) + 3 + 1;
 750                         char oldFile[i];
 751                         char newFile[i];
 752                         i = G.logFileRotate - 1;
 753                         /* rename: f.8 -> f.9; f.7 -> f.8; ... */
 754                         while (1) {
 755                                 sprintf(newFile, "%s.%d", log_file->path, i);
 756                                 if (i == 0) break;
 757                                 sprintf(oldFile, "%s.%d", log_file->path, --i);
 758                                 /* ignore errors - file might be missing */
 759                                 rename(oldFile, newFile);
 760                         }
 761                         /* newFile == "f.0" now */
 762                         rename(log_file->path, newFile);
 763                 }
 764
 765                 /* We may or may not have just renamed the file away;
 766                  * if we didn't rename because we aren't keeping any backlog,
 767                  * then it's time to clobber the file. If we did rename it...,
 768                  * incredibly, if F and F.0 are hardlinks, POSIX _demands_
 769                  * that rename returns 0 but does not remove F!!!
 770                  * (hardlinked F/F.0 pair was observed after
 771                  * power failure during rename()).
 772                  * So ensure old file is gone in any case:
 773                  */
 774                 unlink(log_file->path);
 775 #ifdef SYSLOGD_WRLOCK
 776                 fl.l_type = F_UNLCK;
 777                 fcntl(log_file->fd, F_SETLKW, &fl);
 778 #endif
 779                 close(log_file->fd);
 780                 goto reopen;
 781         }
 782 /* TODO: what to do on write errors ("disk full")? */
 783         len = full_write(log_file->fd, msg, len);
 784         if (len > 0)
 785                 log_file->size += len;
 786 #else
 787         full_write(log_file->fd, msg, len);
 788 #endif
 789
 790 #ifdef SYSLOGD_WRLOCK
 791         fl.l_type = F_UNLCK;
 792         fcntl(log_file->fd, F_SETLKW, &fl);
 793 #endif
 794 }
 795
 796 static void parse_fac_prio_20(int pri, char *res20)
 797 {
 798         const CODE *c_pri, *c_fac;
 799
 800         c_fac = find_by_val(LOG_FAC(pri) << 3, facilitynames);
 801         if (c_fac) {
 802                 c_pri = find_by_val(LOG_PRI(pri), prioritynames);
 803                 if (c_pri) {
 804                         snprintf(res20, 20, "%s.%s", c_fac->c_name, c_pri->c_name);
 805                         return;
 806                 }
 807         }
 808         snprintf(res20, 20, "<%d>", pri);
 809 }
 810
 811 /* len parameter is used only for "is there a timestamp?" check.
 812  * NB: some callers cheat and supply len==0 when they know
 813  * that there is no timestamp, short-circuiting the test. */
 814 static void timestamp_and_log(int pri, char *msg, int len)
 815 {
 816         char *timestamp;
 817         time_t now;
 818
 819         /* Jan 18 00:11:22 msg... */
 820         /* 01234567890123456 */
 821         if (len < 16 || msg[3] != ' ' || msg[6] != ' '
 822          || msg[9] != ':' || msg[12] != ':' || msg[15] != ' '
 823         ) {
 824                 time(&now);
 825                 timestamp = ctime(&now) + 4; /* skip day of week */
 826         } else {
 827                 now = 0;
 828                 timestamp = msg;
 829                 msg += 16;
 830         }
 831         timestamp[15] = '\0';
 832
 833         if (option_mask32 & OPT_kmsg) {
 834                 log_to_kmsg(pri, msg);
 835                 return;
 836         }
 837
 838         if (option_mask32 & OPT_small)
 839                 sprintf(G.printbuf, "%s %s\n", timestamp, msg);
 840         else {
 841                 char res[20];
 842                 parse_fac_prio_20(pri, res);
 843                 sprintf(G.printbuf, "%s %.64s %s %s\n", timestamp, G.hostname, res, msg);
 844         }
 845
 846         /* Log message locally (to file or shared mem) */
 847 #if ENABLE_FEATURE_SYSLOGD_CFG
 848         {
 849                 bool match = 0;
 850                 logRule_t *rule;
 851                 uint8_t facility = LOG_FAC(pri);
 852                 uint8_t prio_bit = 1 << LOG_PRI(pri);
 853
 854                 for (rule = G.log_rules; rule; rule = rule->next) {
 855                         if (rule->enabled_facility_priomap[facility] & prio_bit) {
 856                                 log_locally(now, G.printbuf, rule->file);
 857                                 match = 1;
 858                         }
 859                 }
 860                 if (match)
 861                         return;
 862         }
 863 #endif
 864         if (LOG_PRI(pri) < G.logLevel) {
 865 #if ENABLE_FEATURE_IPC_SYSLOG
 866                 if ((option_mask32 & OPT_circularlog) && G.shbuf) {
 867                         log_to_shmem(G.printbuf);
 868                         return;
 869                 }
 870 #endif
 871                 log_locally(now, G.printbuf, &G.logFile);
 872         }
 873 }
 874
 875 static void timestamp_and_log_internal(const char *msg)
 876 {
 877         /* -L, or no -R */
 878         if (ENABLE_FEATURE_REMOTE_LOG && !(option_mask32 & OPT_locallog))
 879                 return;
 880         timestamp_and_log(LOG_SYSLOG | LOG_INFO, (char*)msg, 0);
 881 }
 882
 883 /* tmpbuf[len] is a NUL byte (set by caller), but there can be other,
 884  * embedded NULs. Split messages on each of these NULs, parse prio,
 885  * escape control chars and log each locally. */
 886 static void split_escape_and_log(char *tmpbuf, int len)
 887 {
 888         char *p = tmpbuf;
 889
 890         tmpbuf += len;
 891         while (p < tmpbuf) {
 892                 char c;
 893                 char *q = G.parsebuf;
 894                 int pri = (LOG_USER | LOG_NOTICE);
 895
 896                 if (*p == '<') {
 897                         /* Parse the magic priority number */
 898                         pri = bb_strtou(p + 1, &p, 10);
 899                         if (*p == '>')
 900                                 p++;
 901                         if (pri & ~(LOG_FACMASK | LOG_PRIMASK))
 902                                 pri = (LOG_USER | LOG_NOTICE);
 903                 }
 904
 905                 while ((c = *p++)) {
 906                         if (c == '\n')
 907                                 c = ' ';
 908                         if (!(c & ~0x1f) && c != '\t') {
 909                                 *q++ = '^';
 910                                 c += '@'; /* ^@, ^A, ^B... */
 911                         }
 912                         *q++ = c;
 913                 }
 914                 *q = '\0';
 915
 916                 /* Now log it */
 917                 timestamp_and_log(pri, G.parsebuf, q - G.parsebuf);
 918         }
 919 }
 920
 921 #ifdef SYSLOGD_MARK
 922 static void do_mark(int sig)
 923 {
 924         if (G.markInterval) {
 925                 timestamp_and_log_internal("-- MARK --");
 926                 alarm(G.markInterval);
 927         }
 928 }
 929 #endif
 930
 931 /* Don't inline: prevent struct sockaddr_un to take up space on stack
 932  * permanently */
 933 static NOINLINE int create_socket(void)
 934 {
 935         struct sockaddr_un sunx;
 936         int sock_fd;
 937         char *dev_log_name;
 938
 939 #if ENABLE_FEATURE_SYSTEMD
 940         if (sd_listen_fds() == 1)
 941                 return SD_LISTEN_FDS_START;
 942 #endif
 943
 944         memset(&sunx, 0, sizeof(sunx));
 945         sunx.sun_family = AF_UNIX;
 946
 947         /* Unlink old /dev/log or object it points to. */
 948         /* (if it exists, bind will fail) */
 949         strcpy(sunx.sun_path, _PATH_LOG);
 950         dev_log_name = xmalloc_follow_symlinks(_PATH_LOG);
 951         if (dev_log_name) {
 952                 safe_strncpy(sunx.sun_path, dev_log_name, sizeof(sunx.sun_path));
 953                 free(dev_log_name);
 954         }
 955         unlink(sunx.sun_path);
 956
 957         sock_fd = xsocket(AF_UNIX, SOCK_DGRAM, 0);
 958         xbind(sock_fd, (struct sockaddr *) &sunx, sizeof(sunx));
 959         chmod(_PATH_LOG, 0666);
 960
 961         return sock_fd;
 962 }
 963
 964 #if ENABLE_FEATURE_REMOTE_LOG
 965 static int try_to_resolve_remote(remoteHost_t *rh)
 966 {
 967         if (!rh->remoteAddr) {
 968                 unsigned now = monotonic_sec();
 969
 970                 /* Don't resolve name too often - DNS timeouts can be big */
 971                 if ((now - rh->last_dns_resolve) < DNS_WAIT_SEC)
 972                         return -1;
 973                 rh->last_dns_resolve = now;
 974                 rh->remoteAddr = host2sockaddr(rh->remoteHostname, 514);
 975                 if (!rh->remoteAddr)
 976                         return -1;
 977         }
 978         return xsocket(rh->remoteAddr->u.sa.sa_family, SOCK_DGRAM, 0);
 979 }
 980 #endif
 981
 982 static void do_syslogd(void) NORETURN;
 983 static void do_syslogd(void)
 984 {
 985 #if ENABLE_FEATURE_REMOTE_LOG
 986         llist_t *item;
 987 #endif
 988 #if ENABLE_FEATURE_SYSLOGD_DUP
 989         int last_sz = -1;
 990         char *last_buf;
 991         char *recvbuf = G.recvbuf;
 992 #else
 993 #define recvbuf (G.recvbuf)
 994 #endif
 995
 996         /* Set up signal handlers (so that they interrupt read()) */
 997         signal_no_SA_RESTART_empty_mask(SIGTERM, record_signo);
 998         signal_no_SA_RESTART_empty_mask(SIGINT, record_signo);
 999         //signal_no_SA_RESTART_empty_mask(SIGQUIT, record_signo);
1000         signal(SIGHUP, SIG_IGN);
1001 #ifdef SYSLOGD_MARK
1002         signal(SIGALRM, do_mark);
1003         alarm(G.markInterval);
1004 #endif
1005         xmove_fd(create_socket(), STDIN_FILENO);
1006
1007         if (option_mask32 & OPT_circularlog)
1008                 ipcsyslog_init();
1009
1010         if (option_mask32 & OPT_kmsg)
1011                 kmsg_init();
1012
1013         timestamp_and_log_internal("syslogd started: BusyBox v" BB_VER);
1014
1015         while (!bb_got_signal) {
1016                 ssize_t sz;
1017
1018 #if ENABLE_FEATURE_SYSLOGD_DUP
1019                 last_buf = recvbuf;
1020                 if (recvbuf == G.recvbuf)
1021                         recvbuf = G.recvbuf + MAX_READ;
1022                 else
1023                         recvbuf = G.recvbuf;
1024 #endif
1025  read_again:
1026                 sz = read(STDIN_FILENO, recvbuf, MAX_READ - 1);
1027                 if (sz < 0) {
1028                         if (!bb_got_signal)
1029                                 bb_perror_msg("read from %s", _PATH_LOG);
1030                         break;
1031                 }
1032
1033                 /* Drop trailing '\n' and NULs (typically there is one NUL) */
1034                 while (1) {
1035                         if (sz == 0)
1036                                 goto read_again;
1037                         /* man 3 syslog says: "A trailing newline is added when needed".
1038                          * However, neither glibc nor uclibc do this:
1039                          * syslog(prio, "test")   sends "test\0" to /dev/log,
1040                          * syslog(prio, "test\n") sends "test\n\0".
1041                          * IOW: newline is passed verbatim!
1042                          * I take it to mean that it's syslogd's job
1043                          * to make those look identical in the log files. */
1044                         if (recvbuf[sz-1] != '\0' && recvbuf[sz-1] != '\n')
1045                                 break;
1046                         sz--;
1047                 }
1048 #if ENABLE_FEATURE_SYSLOGD_DUP
1049                 if ((option_mask32 & OPT_dup) && (sz == last_sz))
1050                         if (memcmp(last_buf, recvbuf, sz) == 0)
1051                                 continue;
1052                 last_sz = sz;
1053 #endif
1054 #if ENABLE_FEATURE_REMOTE_LOG
1055                 /* Stock syslogd sends it '\n'-terminated
1056                  * over network, mimic that */
1057                 recvbuf[sz] = '\n';
1058
1059                 /* We are not modifying log messages in any way before send */
1060                 /* Remote site cannot trust _us_ anyway and need to do validation again */
1061                 for (item = G.remoteHosts; item != NULL; item = item->link) {
1062                         remoteHost_t *rh = (remoteHost_t *)item->data;
1063
1064                         if (rh->remoteFD == -1) {
1065                                 rh->remoteFD = try_to_resolve_remote(rh);
1066                                 if (rh->remoteFD == -1)
1067                                         continue;
1068                         }
1069
1070                         /* Send message to remote logger.
1071                          * On some errors, close and set remoteFD to -1
1072                          * so that DNS resolution is retried.
1073                          */
1074                         if (sendto(rh->remoteFD, recvbuf, sz+1,
1075                                         MSG_DONTWAIT | MSG_NOSIGNAL,
1076                                         &(rh->remoteAddr->u.sa), rh->remoteAddr->len) == -1
1077                         ) {
1078                                 switch (errno) {
1079                                 case ECONNRESET:
1080                                 case ENOTCONN: /* paranoia */
1081                                 case EPIPE:
1082                                         close(rh->remoteFD);
1083                                         rh->remoteFD = -1;
1084                                         free(rh->remoteAddr);
1085                                         rh->remoteAddr = NULL;
1086                                 }
1087                         }
1088                 }
1089 #endif
1090                 if (!ENABLE_FEATURE_REMOTE_LOG || (option_mask32 & OPT_locallog)) {
1091                         recvbuf[sz] = '\0'; /* ensure it *is* NUL terminated */
1092                         split_escape_and_log(recvbuf, sz);
1093                 }
1094         } /* while (!bb_got_signal) */
1095
1096         timestamp_and_log_internal("syslogd exiting");
1097         remove_pidfile(CONFIG_PID_FILE_PATH "/syslogd.pid");
1098         ipcsyslog_cleanup();
1099         if (option_mask32 & OPT_kmsg)
1100                 kmsg_cleanup();
1101         kill_myself_with_sig(bb_got_signal);
1102 #undef recvbuf
1103 }
1104
1105 int syslogd_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1106 int syslogd_main(int argc UNUSED_PARAM, char **argv)
1107 {
1108         int opts;
1109         char OPTION_DECL;
1110 #if ENABLE_FEATURE_REMOTE_LOG
1111         llist_t *remoteAddrList = NULL;
1112 #endif
1113
1114         INIT_G();
1115
1116         /* No non-option params, -R can occur multiple times */
1117         opt_complementary = "=0" IF_FEATURE_REMOTE_LOG(":R::");
1118         opts = getopt32(argv, OPTION_STR, OPTION_PARAM);
1119 #if ENABLE_FEATURE_REMOTE_LOG
1120         while (remoteAddrList) {
1121                 remoteHost_t *rh = xzalloc(sizeof(*rh));
1122                 rh->remoteHostname = llist_pop(&remoteAddrList);
1123                 rh->remoteFD = -1;
1124                 rh->last_dns_resolve = monotonic_sec() - DNS_WAIT_SEC - 1;
1125                 llist_add_to(&G.remoteHosts, rh);
1126         }
1127 #endif
1128
1129 #ifdef SYSLOGD_MARK
1130         if (opts & OPT_mark) // -m
1131                 G.markInterval = xatou_range(opt_m, 0, INT_MAX/60) * 60;
1132 #endif
1133         //if (opts & OPT_nofork) // -n
1134         //if (opts & OPT_outfile) // -O
1135         if (opts & OPT_loglevel) // -l
1136                 G.logLevel = xatou_range(opt_l, 1, 8);
1137         //if (opts & OPT_small) // -S
1138 #if ENABLE_FEATURE_ROTATE_LOGFILE
1139         if (opts & OPT_filesize) // -s
1140                 G.logFileSize = xatou_range(opt_s, 0, INT_MAX/1024) * 1024;
1141         if (opts & OPT_rotatecnt) // -b
1142                 G.logFileRotate = xatou_range(opt_b, 0, 99);
1143 #endif
1144 #if ENABLE_FEATURE_IPC_SYSLOG
1145         if (opt_C) // -Cn
1146                 G.shm_size = xatoul_range(opt_C, 4, INT_MAX/1024) * 1024;
1147 #endif
1148         /* If they have not specified remote logging, then log locally */
1149         if (ENABLE_FEATURE_REMOTE_LOG && !(opts & OPT_remotelog)) // -R
1150                 option_mask32 |= OPT_locallog;
1151 #if ENABLE_FEATURE_SYSLOGD_CFG
1152         parse_syslogdcfg(opt_f);
1153 #endif
1154
1155         /* Store away localhost's name before the fork */
1156         G.hostname = safe_gethostname();
1157         *strchrnul(G.hostname, '.') = '\0';
1158
1159         if (!(opts & OPT_nofork)) {
1160                 bb_daemonize_or_rexec(DAEMON_CHDIR_ROOT, argv);
1161         }
1162
1163         //umask(0); - why??
1164         write_pidfile(CONFIG_PID_FILE_PATH "/syslogd.pid");
1165
1166         do_syslogd();
1167         /* return EXIT_SUCCESS; */
1168 }
1169
1170 /* Clean up. Needed because we are included from syslogd_and_logger.c */
1171 #undef DEBUG
1172 #undef SYSLOGD_MARK
1173 #undef SYSLOGD_WRLOCK
1174 #undef G
1175 #undef GLOBALS
1176 #undef INIT_G
1177 #undef OPTION_STR
1178 #undef OPTION_DECL
1179 #undef OPTION_PARAM