src/server.c

   1 #include "first.h"
   2
   3 #include "server.h"
   4 #include "buffer.h"
   5 #include "network.h"
   6 #include "log.h"
   7 #include "keyvalue.h"
   8 #include "rand.h"
   9 #include "response.h"
  10 #include "request.h"
  11 #include "chunk.h"
  12 #include "http_auth.h"
  13 #include "http_chunk.h"
  14 #include "http_vhostdb.h"
  15 #include "fdevent.h"
  16 #include "connections.h"
  17 #include "sock_addr.h"
  18 #include "stat_cache.h"
  19 #include "plugin.h"
  20 #include "joblist.h"
  21 #include "network_write.h"
  22
  23 #ifdef HAVE_VERSIONSTAMP_H
  24 # include "versionstamp.h"
  25 #else
  26 # define REPO_VERSION ""
  27 #endif
  28
  29 #define PACKAGE_DESC PACKAGE_NAME "/" PACKAGE_VERSION REPO_VERSION
  30
  31 #include <sys/types.h>
  32 #include <sys/time.h>
  33 #include <sys/stat.h>
  34 #include <sys/wait.h>
  35
  36 #include <string.h>
  37 #include <errno.h>
  38 #include <fcntl.h>
  39 #include <unistd.h>
  40 #include <stdlib.h>
  41 #include <time.h>
  42 #include <signal.h>
  43 #include <locale.h>
  44
  45 #include <stdio.h>
  46
  47 #ifdef HAVE_GETOPT_H
  48 # include <getopt.h>
  49 #endif
  50
  51 #ifdef HAVE_VALGRIND_VALGRIND_H
  52 # include <valgrind/valgrind.h>
  53 #endif
  54
  55 #ifdef HAVE_SYS_WAIT_H
  56 # include <sys/wait.h>
  57 #endif
  58
  59 #ifdef HAVE_PWD_H
  60 # include <grp.h>
  61 # include <pwd.h>
  62 #endif
  63
  64 #ifdef HAVE_SYSLOG_H
  65 # include <syslog.h>
  66 #endif
  67
  68 #ifdef HAVE_SYS_RESOURCE_H
  69 # include <sys/resource.h>
  70 #endif
  71
  72 #ifdef HAVE_SYS_PRCTL_H
  73 # include <sys/prctl.h>
  74 #endif
  75
  76 #if defined HAVE_LIBSSL && defined HAVE_OPENSSL_SSL_H
  77 #define USE_SSL
  78 #define TEXT_SSL " (ssl)"
  79 #else
  80 #define TEXT_SSL
  81 #endif
  82
  83 #ifndef __sgi
  84 /* IRIX doesn't like the alarm based time() optimization */
  85 /* #define USE_ALARM */
  86 #endif
  87
  88 static int oneshot_fd = 0;
  89 static volatile int pid_fd = -2;
  90 static server_socket_array graceful_sockets;
  91 static volatile sig_atomic_t graceful_restart = 0;
  92 static volatile sig_atomic_t graceful_shutdown = 0;
  93 static volatile sig_atomic_t srv_shutdown = 0;
  94 static volatile sig_atomic_t handle_sig_child = 0;
  95 static volatile sig_atomic_t handle_sig_alarm = 1;
  96 static volatile sig_atomic_t handle_sig_hup = 0;
  97
  98 #if defined(HAVE_SIGACTION) && defined(SA_SIGINFO)
  99 static volatile siginfo_t last_sigterm_info;
 100 static volatile siginfo_t last_sighup_info;
 101
 102 static void sigaction_handler(int sig, siginfo_t *si, void *context) {
 103         static const siginfo_t empty_siginfo;
 104         UNUSED(context);
 105
 106         if (!si) *(const siginfo_t **)&si = &empty_siginfo;
 107
 108         switch (sig) {
 109         case SIGTERM:
 110                 srv_shutdown = 1;
 111                 last_sigterm_info = *si;
 112                 break;
 113         case SIGUSR1:
 114                 if (!graceful_shutdown) {
 115                         graceful_restart = 1;
 116                         graceful_shutdown = 1;
 117                         last_sigterm_info = *si;
 118                 }
 119                 break;
 120         case SIGINT:
 121                 if (graceful_shutdown) {
 122                         if (2 == graceful_restart)
 123                                 graceful_restart = 1;
 124                         else
 125                                 srv_shutdown = 1;
 126                 } else {
 127                         graceful_shutdown = 1;
 128                 }
 129                 last_sigterm_info = *si;
 130
 131                 break;
 132         case SIGALRM:
 133                 handle_sig_alarm = 1;
 134                 break;
 135         case SIGHUP:
 136                 handle_sig_hup = 1;
 137                 last_sighup_info = *si;
 138                 break;
 139         case SIGCHLD:
 140                 handle_sig_child = 1;
 141                 break;
 142         }
 143 }
 144 #elif defined(HAVE_SIGNAL) || defined(HAVE_SIGACTION)
 145 static void signal_handler(int sig) {
 146         switch (sig) {
 147         case SIGTERM: srv_shutdown = 1; break;
 148         case SIGUSR1:
 149                 if (!graceful_shutdown) {
 150                         graceful_restart = 1;
 151                         graceful_shutdown = 1;
 152                 }
 153                 break;
 154         case SIGINT:
 155                 if (graceful_shutdown) {
 156                         if (2 == graceful_restart)
 157                                 graceful_restart = 1;
 158                         else
 159                                 srv_shutdown = 1;
 160                 } else {
 161                         graceful_shutdown = 1;
 162                 }
 163                 break;
 164         case SIGALRM: handle_sig_alarm = 1; break;
 165         case SIGHUP:  handle_sig_hup = 1; break;
 166         case SIGCHLD: handle_sig_child = 1; break;
 167         }
 168 }
 169 #endif
 170
 171 #ifdef HAVE_FORK
 172 static int daemonize(void) {
 173         int pipefd[2];
 174         pid_t pid;
 175 #ifdef SIGTTOU
 176         signal(SIGTTOU, SIG_IGN);
 177 #endif
 178 #ifdef SIGTTIN
 179         signal(SIGTTIN, SIG_IGN);
 180 #endif
 181 #ifdef SIGTSTP
 182         signal(SIGTSTP, SIG_IGN);
 183 #endif
 184
 185         if (pipe(pipefd) < 0) exit(-1);
 186
 187         if (0 > (pid = fork())) exit(-1);
 188
 189         if (0 < pid) {
 190                 char buf;
 191                 ssize_t bytes;
 192
 193                 close(pipefd[1]);
 194                 /* parent waits for grandchild to be ready */
 195                 do {
 196                         bytes = read(pipefd[0], &buf, sizeof(buf));
 197                 } while (bytes < 0 && EINTR == errno);
 198                 close(pipefd[0]);
 199
 200                 if (bytes <= 0) {
 201                         /* closed fd (without writing) == failure in grandchild */
 202                         fputs("daemonized server failed to start; check error log for details\n", stderr);
 203                         exit(-1);
 204                 }
 205
 206                 exit(0);
 207         }
 208
 209         close(pipefd[0]);
 210
 211         if (-1 == setsid()) exit(0);
 212
 213         signal(SIGHUP, SIG_IGN);
 214
 215         if (0 != fork()) exit(0);
 216
 217         if (0 != chdir("/")) exit(0);
 218
 219         fdevent_setfd_cloexec(pipefd[1]);
 220         return pipefd[1];
 221 }
 222 #endif
 223
 224 static server *server_init(void) {
 225         int i;
 226         server *srv = calloc(1, sizeof(*srv));
 227         force_assert(srv);
 228 #define CLEAN(x) \
 229         srv->x = buffer_init();
 230
 231         CLEAN(response_header);
 232         CLEAN(parse_full_path);
 233         CLEAN(ts_debug_str);
 234         CLEAN(ts_date_str);
 235         CLEAN(errorlog_buf);
 236         CLEAN(response_range);
 237         CLEAN(tmp_buf);
 238         srv->empty_string = buffer_init_string("");
 239         CLEAN(cond_check_buf);
 240
 241         CLEAN(srvconf.errorlog_file);
 242         CLEAN(srvconf.breakagelog_file);
 243         CLEAN(srvconf.groupname);
 244         CLEAN(srvconf.username);
 245         CLEAN(srvconf.changeroot);
 246         CLEAN(srvconf.bindhost);
 247         CLEAN(srvconf.event_handler);
 248         CLEAN(srvconf.pid_file);
 249         CLEAN(srvconf.syslog_facility);
 250
 251         CLEAN(tmp_chunk_len);
 252 #undef CLEAN
 253
 254 #define CLEAN(x) \
 255         srv->x = array_init();
 256
 257         CLEAN(config_context);
 258         CLEAN(config_touched);
 259         CLEAN(status);
 260 #undef CLEAN
 261
 262         for (i = 0; i < FILE_CACHE_MAX; i++) {
 263                 srv->mtime_cache[i].mtime = (time_t)-1;
 264                 srv->mtime_cache[i].str = buffer_init();
 265         }
 266
 267         li_rand_reseed();
 268
 269         srv->cur_ts = time(NULL);
 270         srv->startup_ts = srv->cur_ts;
 271
 272         srv->conns = calloc(1, sizeof(*srv->conns));
 273         force_assert(srv->conns);
 274
 275         srv->joblist = calloc(1, sizeof(*srv->joblist));
 276         force_assert(srv->joblist);
 277
 278         srv->fdwaitqueue = calloc(1, sizeof(*srv->fdwaitqueue));
 279         force_assert(srv->fdwaitqueue);
 280
 281         srv->srvconf.modules = array_init();
 282         srv->srvconf.modules_dir = buffer_init_string(LIBRARY_DIR);
 283         srv->srvconf.network_backend = buffer_init();
 284         srv->srvconf.upload_tempdirs = array_init();
 285         srv->srvconf.reject_expect_100_with_417 = 1;
 286         srv->srvconf.xattr_name = buffer_init_string("Content-Type");
 287         srv->srvconf.http_header_strict  = 1;
 288         srv->srvconf.http_host_strict    = 1; /*(implies http_host_normalize)*/
 289         srv->srvconf.http_host_normalize = 0;
 290         srv->srvconf.high_precision_timestamps = 0;
 291         srv->srvconf.max_request_field_size = 8192;
 292         srv->srvconf.loadavg[0] = 0.0;
 293         srv->srvconf.loadavg[1] = 0.0;
 294         srv->srvconf.loadavg[2] = 0.0;
 295
 296         /* use syslog */
 297         srv->errorlog_fd = STDERR_FILENO;
 298         srv->errorlog_mode = ERRORLOG_FD;
 299
 300         srv->split_vals = array_init();
 301         srv->request_env = plugins_call_handle_request_env;
 302
 303         return srv;
 304 }
 305
 306 static void server_free(server *srv) {
 307         size_t i;
 308
 309         for (i = 0; i < FILE_CACHE_MAX; i++) {
 310                 buffer_free(srv->mtime_cache[i].str);
 311         }
 312
 313         if (oneshot_fd > 0) {
 314                 close(oneshot_fd);
 315         }
 316
 317 #define CLEAN(x) \
 318         buffer_free(srv->x);
 319
 320         CLEAN(response_header);
 321         CLEAN(parse_full_path);
 322         CLEAN(ts_debug_str);
 323         CLEAN(ts_date_str);
 324         CLEAN(errorlog_buf);
 325         CLEAN(response_range);
 326         CLEAN(tmp_buf);
 327         CLEAN(empty_string);
 328         CLEAN(cond_check_buf);
 329
 330         CLEAN(srvconf.errorlog_file);
 331         CLEAN(srvconf.breakagelog_file);
 332         CLEAN(srvconf.groupname);
 333         CLEAN(srvconf.username);
 334         CLEAN(srvconf.changeroot);
 335         CLEAN(srvconf.bindhost);
 336         CLEAN(srvconf.event_handler);
 337         CLEAN(srvconf.pid_file);
 338         CLEAN(srvconf.modules_dir);
 339         CLEAN(srvconf.network_backend);
 340         CLEAN(srvconf.xattr_name);
 341         CLEAN(srvconf.syslog_facility);
 342
 343         CLEAN(tmp_chunk_len);
 344 #undef CLEAN
 345
 346 #if 0
 347         fdevent_unregister(srv->ev, srv->fd);
 348 #endif
 349         fdevent_free(srv->ev);
 350
 351         free(srv->conns);
 352
 353         if (srv->config_storage) {
 354                 for (i = 0; i < srv->config_context->used; i++) {
 355                         specific_config *s = srv->config_storage[i];
 356
 357                         if (!s) continue;
 358
 359                         buffer_free(s->document_root);
 360                         buffer_free(s->server_name);
 361                         buffer_free(s->server_tag);
 362                         buffer_free(s->error_handler);
 363                         buffer_free(s->error_handler_404);
 364                         buffer_free(s->errorfile_prefix);
 365                         buffer_free(s->socket_perms);
 366                         array_free(s->mimetypes);
 367                         free(s);
 368                 }
 369                 free(srv->config_storage);
 370                 srv->config_storage = NULL;
 371         }
 372
 373 #define CLEAN(x) \
 374         array_free(srv->x);
 375
 376         CLEAN(config_context);
 377         CLEAN(config_touched);
 378         CLEAN(status);
 379         CLEAN(srvconf.upload_tempdirs);
 380 #undef CLEAN
 381
 382         joblist_free(srv, srv->joblist);
 383         fdwaitqueue_free(srv, srv->fdwaitqueue);
 384
 385         if (srv->stat_cache) {
 386                 stat_cache_free(srv->stat_cache);
 387         }
 388
 389         array_free(srv->srvconf.modules);
 390         array_free(srv->split_vals);
 391
 392         li_rand_cleanup();
 393
 394         free(srv);
 395 }
 396
 397 static void remove_pid_file(server *srv) {
 398         if (pid_fd <= -2) return;
 399         if (!buffer_string_is_empty(srv->srvconf.pid_file) && 0 <= pid_fd) {
 400                 if (0 != ftruncate(pid_fd, 0)) {
 401                         log_error_write(srv, __FILE__, __LINE__, "sbds",
 402                                         "ftruncate failed for:",
 403                                         srv->srvconf.pid_file,
 404                                         errno,
 405                                         strerror(errno));
 406                 }
 407         }
 408         if (0 <= pid_fd) {
 409                 close(pid_fd);
 410                 pid_fd = -1;
 411         }
 412         if (!buffer_string_is_empty(srv->srvconf.pid_file) &&
 413             buffer_string_is_empty(srv->srvconf.changeroot)) {
 414                 if (0 != unlink(srv->srvconf.pid_file->ptr)) {
 415                         if (errno != EACCES && errno != EPERM) {
 416                                 log_error_write(srv, __FILE__, __LINE__, "sbds",
 417                                                 "unlink failed for:",
 418                                                 srv->srvconf.pid_file,
 419                                                 errno,
 420                                                 strerror(errno));
 421                         }
 422                 }
 423         }
 424 }
 425
 426
 427 static server_socket * server_oneshot_getsock(server *srv, sock_addr *cnt_addr) {
 428         server_socket *srv_socket, *srv_socket_wild = NULL;
 429         size_t i;
 430         for (i = 0; i < srv->srv_sockets.used; ++i) {
 431                 srv_socket = srv->srv_sockets.ptr[i];
 432                 if (!sock_addr_is_port_eq(&srv_socket->addr,cnt_addr)) continue;
 433                 if (sock_addr_is_addr_eq(&srv_socket->addr,cnt_addr)) return srv_socket;
 434
 435                 if (NULL != srv_socket_wild) continue;
 436                 if (sock_addr_is_addr_wildcard(&srv_socket->addr)) {
 437                         srv_socket_wild = srv_socket;
 438                 }
 439         }
 440
 441         if (NULL != srv_socket_wild) {
 442                 return srv_socket_wild;
 443         } else if (srv->srv_sockets.used) {
 444                 return srv->srv_sockets.ptr[0];
 445         } else {
 446                 log_error_write(srv, __FILE__, __LINE__, "s", "no sockets configured");
 447                 return NULL;
 448         }
 449 }
 450
 451
 452 static int server_oneshot_init(server *srv, int fd) {
 453         /* Note: does not work with netcat due to requirement that fd be socket.
 454          * STDOUT_FILENO was not saved earlier in startup, and that is to where
 455          * netcat expects output to be sent.  Since lighttpd expects connections
 456          * to be sockets, con->fd is where output is sent; separate fds are not
 457          * stored for input and output, but netcat has different fds for stdin
 458          * and * stdout.  To support netcat, would additionally need to avoid
 459          * S_ISSOCK(), getsockname(), and getpeername() below, reconstructing
 460          * addresses from environment variables:
 461          *   NCAT_LOCAL_ADDR   NCAT_LOCAL_PORT
 462          *   NCAT_REMOTE_ADDR  NCAT_REMOTE_PORT
 463          *   NCAT_PROTO
 464          */
 465         connection *con;
 466         server_socket *srv_socket;
 467         sock_addr cnt_addr;
 468         socklen_t cnt_len;
 469         struct stat st;
 470
 471         if (0 != fstat(fd, &st)) {
 472                 log_error_write(srv, __FILE__, __LINE__, "ss", "fstat:", strerror(errno));
 473                 return 0;
 474         }
 475
 476         if (!S_ISSOCK(st.st_mode)) {
 477                 /* require that fd is a socket
 478                  * (modules might expect STDIN_FILENO and STDOUT_FILENO opened to /dev/null) */
 479                 log_error_write(srv, __FILE__, __LINE__, "s", "lighttpd -1 stdin is not a socket");
 480                 return 0;
 481         }
 482
 483         cnt_len = sizeof(cnt_addr);
 484         if (0 != getsockname(fd, (struct sockaddr *)&cnt_addr, &cnt_len)) {
 485                 log_error_write(srv, __FILE__, __LINE__, "ss", "getsockname:", strerror(errno));
 486                 return 0;
 487         }
 488
 489         srv_socket = server_oneshot_getsock(srv, &cnt_addr);
 490         if (NULL == srv_socket) return 0;
 491
 492         cnt_len = sizeof(cnt_addr);
 493         if (0 != getpeername(fd, (struct sockaddr *)&cnt_addr, &cnt_len)) {
 494                 log_error_write(srv, __FILE__, __LINE__, "ss", "getpeername:", strerror(errno));
 495                 return 0;
 496         }
 497
 498         /*(must set flags; fd did not pass through fdevent accept() logic)*/
 499         if (-1 == fdevent_fcntl_set_nb_cloexec(srv->ev, fd)) {
 500                 log_error_write(srv, __FILE__, __LINE__, "ss", "fcntl:", strerror(errno));
 501                 return 0;
 502         }
 503
 504         if (sock_addr_get_family(&cnt_addr) != AF_UNIX) {
 505                 network_accept_tcp_nagle_disable(fd);
 506         }
 507
 508         con = connection_accepted(srv, srv_socket, &cnt_addr, fd);
 509         if (NULL == con) return 0;
 510
 511         connection_state_machine(srv, con);
 512         return 1;
 513 }
 514
 515
 516 static void show_version (void) {
 517         char *b = PACKAGE_DESC TEXT_SSL \
 518 " - a light and fast webserver\n"
 519 #ifdef NONREPRODUCIBLE_BUILD
 520 "Build-Date: " __DATE__ " " __TIME__ "\n";
 521 #endif
 522 ;
 523         write_all(STDOUT_FILENO, b, strlen(b));
 524 }
 525
 526 static void show_features (void) {
 527   static const char event_handlers[] = ""
 528       "\nEvent Handlers:\n\n"
 529 #ifdef USE_SELECT
 530       "\t+ select (generic)\n"
 531 #else
 532       "\t- select (generic)\n"
 533 #endif
 534 #ifdef USE_POLL
 535       "\t+ poll (Unix)\n"
 536 #else
 537       "\t- poll (Unix)\n"
 538 #endif
 539 #ifdef USE_LINUX_EPOLL
 540       "\t+ epoll (Linux 2.6)\n"
 541 #else
 542       "\t- epoll (Linux 2.6)\n"
 543 #endif
 544 #ifdef USE_SOLARIS_DEVPOLL
 545       "\t+ /dev/poll (Solaris)\n"
 546 #else
 547       "\t- /dev/poll (Solaris)\n"
 548 #endif
 549 #ifdef USE_SOLARIS_PORT
 550       "\t+ eventports (Solaris)\n"
 551 #else
 552       "\t- eventports (Solaris)\n"
 553 #endif
 554 #ifdef USE_FREEBSD_KQUEUE
 555       "\t+ kqueue (FreeBSD)\n"
 556 #else
 557       "\t- kqueue (FreeBSD)\n"
 558 #endif
 559 #ifdef USE_LIBEV
 560       "\t+ libev (generic)\n"
 561 #else
 562       "\t- libev (generic)\n"
 563 #endif
 564       ;
 565
 566   static const char features[] =
 567       "\nFeatures:\n\n"
 568 #ifdef HAVE_IPV6
 569       "\t+ IPv6 support\n"
 570 #else
 571       "\t- IPv6 support\n"
 572 #endif
 573 #if defined HAVE_ZLIB_H && defined HAVE_LIBZ
 574       "\t+ zlib support\n"
 575 #else
 576       "\t- zlib support\n"
 577 #endif
 578 #if defined HAVE_BZLIB_H && defined HAVE_LIBBZ2
 579       "\t+ bzip2 support\n"
 580 #else
 581       "\t- bzip2 support\n"
 582 #endif
 583 #if defined(HAVE_CRYPT) || defined(HAVE_CRYPT_R) || defined(HAVE_LIBCRYPT)
 584       "\t+ crypt support\n"
 585 #else
 586       "\t- crypt support\n"
 587 #endif
 588 #ifdef USE_SSL
 589       "\t+ SSL support\n"
 590 #else
 591       "\t- SSL support\n"
 592 #endif
 593 #ifdef HAVE_LIBPCRE
 594       "\t+ PCRE support\n"
 595 #else
 596       "\t- PCRE support\n"
 597 #endif
 598 #ifdef HAVE_MYSQL
 599       "\t+ MySQL support\n"
 600 #else
 601       "\t- MySQL support\n"
 602 #endif
 603 #ifdef HAVE_PGSQL
 604       "\t+ PgSQL support\n"
 605 #else
 606       "\t- PgSQL support\n"
 607 #endif
 608 #ifdef HAVE_DBI
 609       "\t+ DBI support\n"
 610 #else
 611       "\t- DBI support\n"
 612 #endif
 613 #ifdef HAVE_KRB5
 614       "\t+ Kerberos support\n"
 615 #else
 616       "\t- Kerberos support\n"
 617 #endif
 618 #if defined(HAVE_LDAP_H) && defined(HAVE_LBER_H) && defined(HAVE_LIBLDAP) && defined(HAVE_LIBLBER)
 619       "\t+ LDAP support\n"
 620 #else
 621       "\t- LDAP support\n"
 622 #endif
 623 #ifdef USE_MEMCACHED
 624       "\t+ memcached support\n"
 625 #else
 626       "\t- memcached support\n"
 627 #endif
 628 #ifdef HAVE_FAM_H
 629       "\t+ FAM support\n"
 630 #else
 631       "\t- FAM support\n"
 632 #endif
 633 #ifdef HAVE_LUA_H
 634       "\t+ LUA support\n"
 635 #else
 636       "\t- LUA support\n"
 637 #endif
 638 #ifdef HAVE_LIBXML_H
 639       "\t+ xml support\n"
 640 #else
 641       "\t- xml support\n"
 642 #endif
 643 #ifdef HAVE_SQLITE3_H
 644       "\t+ SQLite support\n"
 645 #else
 646       "\t- SQLite support\n"
 647 #endif
 648 #ifdef HAVE_GDBM_H
 649       "\t+ GDBM support\n"
 650 #else
 651       "\t- GDBM support\n"
 652 #endif
 653       ;
 654   show_version();
 655   printf("%s%s%s\n", event_handlers, network_write_show_handlers(), features);
 656 }
 657
 658 static void show_help (void) {
 659         char *b = PACKAGE_DESC TEXT_SSL
 660 #ifdef NONREPRODUCIBLE_BUILD
 661 " ("__DATE__ " " __TIME__ ")"
 662 #endif
 663 " - a light and fast webserver\n" \
 664 "usage:\n" \
 665 " -f <name>  filename of the config-file\n" \
 666 " -m <name>  module directory (default: "LIBRARY_DIR")\n" \
 667 " -i <secs>  graceful shutdown after <secs> of inactivity\n" \
 668 " -1         process single (one) request on stdin socket, then exit\n" \
 669 " -p         print the parsed config-file in internal form, and exit\n" \
 670 " -t         test config-file syntax, then exit\n" \
 671 " -tt        test config-file syntax, load and init modules, then exit\n" \
 672 " -D         don't go to background (default: go to background)\n" \
 673 " -v         show version\n" \
 674 " -V         show compile-time features\n" \
 675 " -h         show this help\n" \
 676 "\n"
 677 ;
 678         write_all(STDOUT_FILENO, b, strlen(b));
 679 }
 680
 681 /**
 682  * open the errorlog
 683  *
 684  * we have 4 possibilities:
 685  * - stderr (default)
 686  * - syslog
 687  * - logfile
 688  * - pipe
 689  *
 690  */
 691
 692 static int log_error_open(server *srv) {
 693     int errfd;
 694   #ifdef HAVE_SYSLOG_H
 695     /* perhaps someone wants to use syslog() */
 696     int facility = -1;
 697     if (!buffer_string_is_empty(srv->srvconf.syslog_facility)) {
 698         static const struct facility_name_st {
 699           const char *name;
 700           int val;
 701         } facility_names[] = {
 702             { "auth",     LOG_AUTH }
 703           #ifdef LOG_AUTHPRIV
 704            ,{ "authpriv", LOG_AUTHPRIV }
 705           #endif
 706           #ifdef LOG_CRON
 707            ,{ "cron",     LOG_CRON }
 708           #endif
 709            ,{ "daemon",   LOG_DAEMON }
 710           #ifdef LOG_FTP
 711            ,{ "ftp",      LOG_FTP }
 712           #endif
 713           #ifdef LOG_KERN
 714            ,{ "kern",     LOG_KERN }
 715           #endif
 716           #ifdef LOG_LPR
 717            ,{ "lpr",      LOG_LPR }
 718           #endif
 719           #ifdef LOG_MAIL
 720            ,{ "mail",     LOG_MAIL }
 721           #endif
 722           #ifdef LOG_NEWS
 723            ,{ "news",     LOG_NEWS }
 724           #endif
 725            ,{ "security", LOG_AUTH }           /* DEPRECATED */
 726           #ifdef LOG_SYSLOG
 727            ,{ "syslog",   LOG_SYSLOG }
 728           #endif
 729           #ifdef LOG_USER
 730            ,{ "user",     LOG_USER }
 731           #endif
 732           #ifdef LOG_UUCP
 733            ,{ "uucp",     LOG_UUCP }
 734           #endif
 735            ,{ "local0",   LOG_LOCAL0 }
 736            ,{ "local1",   LOG_LOCAL1 }
 737            ,{ "local2",   LOG_LOCAL2 }
 738            ,{ "local3",   LOG_LOCAL3 }
 739            ,{ "local4",   LOG_LOCAL4 }
 740            ,{ "local5",   LOG_LOCAL5 }
 741            ,{ "local6",   LOG_LOCAL6 }
 742            ,{ "local7",   LOG_LOCAL7 }
 743         };
 744         unsigned int i;
 745         for (i = 0; i < sizeof(facility_names)/sizeof(facility_names[0]); ++i) {
 746             const struct facility_name_st *f = facility_names+i;
 747             if (0 == strcmp(srv->srvconf.syslog_facility->ptr, f->name)) {
 748                 facility = f->val;
 749                 break;
 750             }
 751         }
 752         if (-1 == facility) {
 753             log_error_write(srv, __FILE__, __LINE__, "SBS",
 754                             "unrecognized server.syslog-facility: \"",
 755                             srv->srvconf.syslog_facility,
 756                             "\"; defaulting to \"daemon\" facility");
 757         }
 758     }
 759     openlog("lighttpd", LOG_CONS|LOG_PID, -1==facility ? LOG_DAEMON : facility);
 760   #endif
 761
 762     srv->errorlog_mode = ERRORLOG_FD;
 763     srv->errorlog_fd = STDERR_FILENO;
 764
 765     if (srv->srvconf.errorlog_use_syslog) {
 766         srv->errorlog_mode = ERRORLOG_SYSLOG;
 767     }
 768     else if (!buffer_string_is_empty(srv->srvconf.errorlog_file)) {
 769         const char *logfile = srv->srvconf.errorlog_file->ptr;
 770
 771         if (-1 == (srv->errorlog_fd = fdevent_open_logger(logfile))) {
 772             log_error_write(srv, __FILE__, __LINE__, "SSSS",
 773                             "opening errorlog '", logfile,
 774                             "' failed: ", strerror(errno));
 775             return -1;
 776         }
 777         srv->errorlog_mode = logfile[0] == '|' ? ERRORLOG_PIPE : ERRORLOG_FILE;
 778     }
 779
 780     if (srv->errorlog_mode == ERRORLOG_FD && !srv->srvconf.dont_daemonize) {
 781         /* We can only log to stderr in dont-daemonize mode;
 782          * if we do daemonize and no errorlog file is specified,
 783          * we log into /dev/null
 784          */
 785         srv->errorlog_fd = -1;
 786     }
 787
 788     if (!buffer_string_is_empty(srv->srvconf.breakagelog_file)) {
 789         const char *logfile = srv->srvconf.breakagelog_file->ptr;
 790
 791         if (srv->errorlog_mode == ERRORLOG_FD) {
 792             srv->errorlog_fd = dup(STDERR_FILENO);
 793             fdevent_setfd_cloexec(srv->errorlog_fd);
 794         }
 795
 796         if (-1 == (errfd = fdevent_open_logger(logfile))) {
 797             log_error_write(srv, __FILE__, __LINE__, "SSSS",
 798                             "opening errorlog '", logfile,
 799                             "' failed: ", strerror(errno));
 800             return -1;
 801         }
 802
 803         if (*logfile == '|') fdevent_breakagelog_logger_pipe(errfd);
 804     }
 805     else if (!srv->srvconf.dont_daemonize) {
 806         /* move STDERR_FILENO to /dev/null */
 807         if (-1 == (errfd = fdevent_open_devnull())) {
 808             log_error_write(srv, __FILE__, __LINE__, "ss",
 809                             "opening /dev/null failed:", strerror(errno));
 810             return -1;
 811         }
 812     }
 813     else {
 814         /*(leave STDERR_FILENO as-is)*/
 815         errfd = -1;
 816     }
 817
 818     if (0 != fdevent_set_stdin_stdout_stderr(-1, -1, errfd)) {
 819         log_error_write(srv, __FILE__, __LINE__, "ss",
 820                         "setting stderr failed:", strerror(errno));
 821       #ifdef FD_CLOEXEC
 822         if (-1 != errfd) close(errfd);
 823       #endif
 824         return -1;
 825     }
 826   #ifdef FD_CLOEXEC
 827     if (-1 != errfd) close(errfd);
 828   #endif
 829
 830     return 0;
 831 }
 832
 833 /**
 834  * cycle the errorlog
 835  *
 836  */
 837
 838 static int log_error_cycle(server *srv) {
 839     /* cycle only if the error log is a file */
 840
 841     if (srv->errorlog_mode == ERRORLOG_FILE) {
 842         const char *logfile = srv->srvconf.errorlog_file->ptr;
 843         if (-1 == fdevent_cycle_logger(logfile, &srv->errorlog_fd)) {
 844             /* write to old log */
 845             log_error_write(srv, __FILE__, __LINE__, "SSSS",
 846                             "cycling errorlog '", logfile,
 847                             "' failed: ", strerror(errno));
 848         }
 849     }
 850
 851     return 0;
 852 }
 853
 854 static int log_error_close(server *srv) {
 855     switch(srv->errorlog_mode) {
 856     case ERRORLOG_PIPE:
 857     case ERRORLOG_FILE:
 858     case ERRORLOG_FD:
 859         if (-1 != srv->errorlog_fd) {
 860             /* don't close STDERR */
 861             /* fdevent_close_logger_pipes() closes ERRORLOG_PIPE */
 862             if (STDERR_FILENO != srv->errorlog_fd
 863                 && srv->errorlog_mode != ERRORLOG_PIPE) {
 864                 close(srv->errorlog_fd);
 865             }
 866             srv->errorlog_fd = -1;
 867         }
 868         break;
 869     case ERRORLOG_SYSLOG:
 870       #ifdef HAVE_SYSLOG_H
 871         closelog();
 872       #endif
 873         break;
 874     }
 875
 876     return 0;
 877 }
 878
 879 static void server_sockets_save (server *srv) {    /* graceful_restart */
 880     memcpy(&graceful_sockets, &srv->srv_sockets, sizeof(server_socket_array));
 881     memset(&srv->srv_sockets, 0, sizeof(server_socket_array));
 882 }
 883
 884 static void server_sockets_restore (server *srv) { /* graceful_restart */
 885     memcpy(&srv->srv_sockets, &graceful_sockets, sizeof(server_socket_array));
 886     memset(&graceful_sockets, 0, sizeof(server_socket_array));
 887 }
 888
 889 static int server_sockets_set_nb_cloexec (server *srv) {
 890     if (srv->sockets_disabled) return 0; /* lighttpd -1 (one-shot mode) */
 891     for (size_t i = 0; i < srv->srv_sockets.used; ++i) {
 892         server_socket *srv_socket = srv->srv_sockets.ptr[i];
 893         if (-1 == fdevent_fcntl_set_nb_cloexec_sock(srv->ev, srv_socket->fd)) {
 894             log_error_write(srv, __FILE__, __LINE__, "ss",
 895                             "fcntl failed:", strerror(errno));
 896             return -1;
 897         }
 898     }
 899     return 0;
 900 }
 901
 902 static void server_sockets_set_event (server *srv, int event) {
 903     for (size_t i = 0; i < srv->srv_sockets.used; ++i) {
 904         server_socket *srv_socket = srv->srv_sockets.ptr[i];
 905         fdevent_event_set(srv->ev,&(srv_socket->fde_ndx),srv_socket->fd,event);
 906     }
 907 }
 908
 909 static void server_sockets_unregister (server *srv) {
 910     for (size_t i = 0; i < srv->srv_sockets.used; ++i)
 911         network_unregister_sock(srv, srv->srv_sockets.ptr[i]);
 912 }
 913
 914 static void server_sockets_close (server *srv) {
 915     /* closing socket right away will make it possible for the next lighttpd
 916      * to take over (old-style graceful restart), but only if backends
 917      * (e.g. fastcgi, scgi, etc) are independent from lighttpd, rather
 918      * than started by lighttpd via "bin-path")
 919      */
 920     for (size_t i = 0; i < srv->srv_sockets.used; ++i) {
 921         server_socket *srv_socket = srv->srv_sockets.ptr[i];
 922         if (-1 == srv_socket->fd) continue;
 923         network_unregister_sock(srv, srv_socket);
 924         close(srv_socket->fd);
 925         srv_socket->fd = -1;
 926         /* network_close() will cleanup after us */
 927     }
 928 }
 929
 930 static void server_graceful_shutdown_maint (server *srv) {
 931     connections *conns = srv->conns;
 932     for (size_t ndx = 0; ndx < conns->used; ++ndx) {
 933         connection * const con = conns->ptr[ndx];
 934         int changed = 0;
 935
 936         if (con->state == CON_STATE_CLOSE) {
 937             /* reduce remaining linger timeout to be
 938              * (from zero) *up to* one more second, but no more */
 939             if (HTTP_LINGER_TIMEOUT > 1)
 940                 con->close_timeout_ts -= (HTTP_LINGER_TIMEOUT - 1);
 941             if (srv->cur_ts - con->close_timeout_ts > HTTP_LINGER_TIMEOUT)
 942                 changed = 1;
 943         }
 944         else if (con->state == CON_STATE_READ && con->request_count > 1
 945                  && chunkqueue_is_empty(con->read_queue)) {
 946             /* close connections in keep-alive waiting for next request */
 947             connection_set_state(srv, con, CON_STATE_ERROR);
 948             changed = 1;
 949         }
 950
 951         con->keep_alive = 0;                    /* disable keep-alive */
 952
 953         con->conf.kbytes_per_second = 0;        /* disable rate limit */
 954         con->conf.global_kbytes_per_second = 0; /* disable rate limit */
 955         if (con->traffic_limit_reached) {
 956             con->traffic_limit_reached = 0;
 957             changed = 1;
 958         }
 959
 960         if (changed) {
 961             connection_state_machine(srv, con);
 962         }
 963     }
 964 }
 965
 966 static void server_graceful_state (server *srv) {
 967
 968     if (!srv_shutdown) server_graceful_shutdown_maint(srv);
 969
 970     if (!oneshot_fd) {
 971         if (0==srv->srv_sockets.used || -1 == srv->srv_sockets.ptr[0]->fde_ndx)
 972             return;
 973     }
 974
 975     log_error_write(srv, __FILE__, __LINE__, "s",
 976                     "[note] graceful shutdown started");
 977
 978     /* no graceful restart if chroot()ed, if oneshot mode, or if idle timeout */
 979     if (!buffer_string_is_empty(srv->srvconf.changeroot)
 980         || oneshot_fd || 2 == graceful_shutdown)
 981         graceful_restart = 0;
 982
 983     if (graceful_restart) {
 984         server_sockets_unregister(srv);
 985         if (pid_fd > 0) pid_fd = -pid_fd; /*(flag to skip removing pid file)*/
 986     }
 987     else {
 988         server_sockets_close(srv);
 989         remove_pid_file(srv);
 990         buffer_reset(srv->srvconf.pid_file); /*(prevent more removal attempts)*/
 991     }
 992 }
 993
 994 static int server_main (server * const srv, int argc, char **argv) {
 995         int print_config = 0;
 996         int test_config = 0;
 997         int i_am_root = 0;
 998         int o;
 999 #ifdef HAVE_FORK
1000         int num_childs = 0;
1001 #endif
1002         size_t i;
1003         time_t idle_limit = 0, last_active_ts = time(NULL);
1004 #ifdef HAVE_SIGACTION
1005         struct sigaction act;
1006 #endif
1007
1008 #ifdef HAVE_FORK
1009         int parent_pipe_fd = -1;
1010 #endif
1011         int stdin_fd = -1;
1012
1013 #ifdef HAVE_GETUID
1014         i_am_root = (0 == getuid());
1015 #endif
1016
1017         /* initialize globals (including file-scoped static globals) */
1018         oneshot_fd = 0;
1019         srv_shutdown = 0;
1020         graceful_shutdown = 0;
1021         handle_sig_alarm = 1;
1022         handle_sig_hup = 0;
1023         chunkqueue_set_tempdirs_default_reset();
1024         http_auth_dumbdata_reset();
1025         http_vhostdb_dumbdata_reset();
1026         /*graceful_restart = 0;*//*(reset below to avoid further daemonizing)*/
1027         /*(intentionally preserved)*/
1028         /*memset(graceful_sockets, 0, sizeof(graceful_sockets));*/
1029         /*pid_fd = -1;*/
1030
1031         srv->srvconf.port = 0;
1032         srv->srvconf.dont_daemonize = 0;
1033         srv->srvconf.preflight_check = 0;
1034
1035         while(-1 != (o = getopt(argc, argv, "f:m:i:hvVD1pt"))) {
1036                 switch(o) {
1037                 case 'f':
1038                         if (srv->config_storage) {
1039                                 log_error_write(srv, __FILE__, __LINE__, "s",
1040                                                 "Can only read one config file. Use the include command to use multiple config files.");
1041                                 return -1;
1042                         }
1043                         if (config_read(srv, optarg)) {
1044                                 return -1;
1045                         }
1046                         break;
1047                 case 'm':
1048                         buffer_copy_string(srv->srvconf.modules_dir, optarg);
1049                         break;
1050                 case 'i': {
1051                         char *endptr;
1052                         long timeout = strtol(optarg, &endptr, 0);
1053                         if (!*optarg || *endptr || timeout < 0) {
1054                                 log_error_write(srv, __FILE__, __LINE__, "ss",
1055                                                 "Invalid idle timeout value:", optarg);
1056                                 return -1;
1057                         }
1058                         idle_limit = (time_t)timeout;
1059                         break;
1060                 }
1061                 case 'p': print_config = 1; break;
1062                 case 't': ++test_config; break;
1063                 case '1': if (0 == oneshot_fd) oneshot_fd = dup(STDIN_FILENO);
1064                           break;
1065                 case 'D': srv->srvconf.dont_daemonize = 1; break;
1066                 case 'v': show_version(); return 0;
1067                 case 'V': show_features(); return 0;
1068                 case 'h': show_help(); return 0;
1069                 default:
1070                         show_help();
1071                         return -1;
1072                 }
1073         }
1074
1075         if (!srv->config_storage) {
1076                 log_error_write(srv, __FILE__, __LINE__, "s",
1077                                 "No configuration available. Try using -f option.");
1078                 return -1;
1079         }
1080
1081         if (print_config) {
1082                 data_unset *dc = srv->config_context->data[0];
1083                 if (dc) {
1084                         dc->print(dc, 0);
1085                         fprintf(stdout, "\n");
1086                 } else {
1087                         /* shouldn't happend */
1088                         fprintf(stderr, "global config not found\n");
1089                 }
1090         }
1091
1092         if (test_config) {
1093                 buffer_reset(srv->srvconf.pid_file);
1094                 if (1 == test_config) {
1095                         printf("Syntax OK\n");
1096                 } else { /*(test_config > 1)*/
1097                         test_config = 0;
1098                         srv->srvconf.preflight_check = 1;
1099                         srv->srvconf.dont_daemonize = 1;
1100                 }
1101         }
1102
1103         if (test_config || print_config) {
1104                 return 0;
1105         }
1106
1107         if (oneshot_fd) {
1108                 if (oneshot_fd <= STDERR_FILENO) {
1109                         log_error_write(srv, __FILE__, __LINE__, "s",
1110                                         "Invalid fds at startup with lighttpd -1");
1111                         return -1;
1112                 }
1113                 graceful_shutdown = 1;
1114                 srv->sockets_disabled = 1;
1115                 srv->srvconf.dont_daemonize = 1;
1116                 buffer_reset(srv->srvconf.pid_file);
1117                 if (srv->srvconf.max_worker) {
1118                         srv->srvconf.max_worker = 0;
1119                         log_error_write(srv, __FILE__, __LINE__, "s",
1120                                         "server one-shot command line option disables server.max-worker config file option.");
1121                 }
1122         }
1123
1124         if (buffer_is_equal_string(srv->srvconf.bindhost, CONST_STR_LEN("/dev/stdin"))) {
1125                 stdin_fd = dup(STDIN_FILENO);
1126                 if (stdin_fd <= STDERR_FILENO) {
1127                         log_error_write(srv, __FILE__, __LINE__, "s",
1128                                         "Invalid fds at startup");
1129                         return -1;
1130                 }
1131         }
1132
1133         /* close stdin and stdout, as they are not needed */
1134         {
1135                 struct stat st;
1136                 int devnull;
1137                 int errfd;
1138                 do {
1139                         /* coverity[overwrite_var : FALSE] */
1140                         devnull = fdevent_open_devnull();
1141                       #ifdef __COVERITY__
1142                         __coverity_escape__(devnull);
1143                       #endif
1144                 } while (-1 != devnull && devnull <= STDERR_FILENO);
1145                 if (-1 == devnull) {
1146                         log_error_write(srv, __FILE__, __LINE__, "ss",
1147                                         "opening /dev/null failed:", strerror(errno));
1148                         return -1;
1149                 }
1150                 errfd = (0 == fstat(STDERR_FILENO, &st)) ? -1 : devnull;
1151                 if (0 != fdevent_set_stdin_stdout_stderr(devnull, devnull, errfd)) {
1152                         log_error_write(srv, __FILE__, __LINE__, "ss",
1153                                         "setting default fds failed:", strerror(errno));
1154                       #ifdef FD_CLOEXEC
1155                         if (-1 != errfd) close(errfd);
1156                         if (devnull != errfd) close(devnull);
1157                       #endif
1158                         return -1;
1159                 }
1160               #ifdef FD_CLOEXEC
1161                 if (-1 != errfd) close(errfd);
1162                 if (devnull != errfd) close(devnull);
1163               #endif
1164         }
1165
1166         if (0 != config_set_defaults(srv)) {
1167                 log_error_write(srv, __FILE__, __LINE__, "s",
1168                                 "setting default values failed");
1169                 return -1;
1170         }
1171
1172         /* check document-root */
1173         if (buffer_string_is_empty(srv->config_storage[0]->document_root)) {
1174                 log_error_write(srv, __FILE__, __LINE__, "s",
1175                                 "document-root is not set\n");
1176                 return -1;
1177         }
1178
1179         if (plugins_load(srv)) {
1180                 log_error_write(srv, __FILE__, __LINE__, "s",
1181                                 "loading plugins finally failed");
1182                 return -1;
1183         }
1184
1185         if (HANDLER_GO_ON != plugins_call_init(srv)) {
1186                 log_error_write(srv, __FILE__, __LINE__, "s", "Initialization of plugins failed. Going down.");
1187                 return -1;
1188         }
1189
1190         /* open pid file BEFORE chroot */
1191         if (-2 == pid_fd) pid_fd = -1; /*(initial startup state)*/
1192         if (-1 == pid_fd && !buffer_string_is_empty(srv->srvconf.pid_file)) {
1193                 if (-1 == (pid_fd = fdevent_open_cloexec(srv->srvconf.pid_file->ptr, O_WRONLY | O_CREAT | O_EXCL | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH))) {
1194                         struct stat st;
1195                         if (errno != EEXIST) {
1196                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
1197                                         "opening pid-file failed:", srv->srvconf.pid_file, strerror(errno));
1198                                 return -1;
1199                         }
1200
1201                         if (0 != stat(srv->srvconf.pid_file->ptr, &st)) {
1202                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
1203                                                 "stating existing pid-file failed:", srv->srvconf.pid_file, strerror(errno));
1204                         }
1205
1206                         if (!S_ISREG(st.st_mode)) {
1207                                 log_error_write(srv, __FILE__, __LINE__, "sb",
1208                                                 "pid-file exists and isn't regular file:", srv->srvconf.pid_file);
1209                                 return -1;
1210                         }
1211
1212                         if (-1 == (pid_fd = fdevent_open_cloexec(srv->srvconf.pid_file->ptr, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH))) {
1213                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
1214                                                 "opening pid-file failed:", srv->srvconf.pid_file, strerror(errno));
1215                                 return -1;
1216                         }
1217                 }
1218         }
1219
1220         if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
1221                 /* select limits itself
1222                  *
1223                  * as it is a hard limit and will lead to a segfault we add some safety
1224                  * */
1225                 srv->max_fds = FD_SETSIZE - 200;
1226         } else {
1227                 srv->max_fds = 4096;
1228         }
1229
1230         {
1231 #ifdef HAVE_GETRLIMIT
1232                 struct rlimit rlim;
1233                 int use_rlimit = 1;
1234 #ifdef HAVE_VALGRIND_VALGRIND_H
1235                 if (RUNNING_ON_VALGRIND) use_rlimit = 0;
1236 #endif
1237
1238                 if (0 != getrlimit(RLIMIT_NOFILE, &rlim)) {
1239                         log_error_write(srv, __FILE__, __LINE__,
1240                                         "ss", "couldn't get 'max filedescriptors'",
1241                                         strerror(errno));
1242                         return -1;
1243                 }
1244
1245                 /**
1246                  * if we are not root can can't increase the fd-limit above rlim_max, but we can reduce it
1247                  */
1248                 if (use_rlimit && srv->srvconf.max_fds
1249                     && (i_am_root || srv->srvconf.max_fds <= rlim.rlim_max)) {
1250                         /* set rlimits */
1251
1252                         rlim.rlim_cur = srv->srvconf.max_fds;
1253                         if (i_am_root) rlim.rlim_max = srv->srvconf.max_fds;
1254
1255                         if (0 != setrlimit(RLIMIT_NOFILE, &rlim)) {
1256                                 log_error_write(srv, __FILE__, __LINE__,
1257                                                 "ss", "couldn't set 'max filedescriptors'",
1258                                                 strerror(errno));
1259                                 return -1;
1260                         }
1261                 }
1262
1263                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
1264                         srv->max_fds = rlim.rlim_cur < (rlim_t)FD_SETSIZE - 200 ? (int)rlim.rlim_cur : (int)FD_SETSIZE - 200;
1265                 } else {
1266                         srv->max_fds = rlim.rlim_cur;
1267                         /*(default upper limit of 4k if server.max-fds not specified)*/
1268                         if (i_am_root && 0 == srv->srvconf.max_fds && rlim.rlim_cur > 4096)
1269                                 srv->max_fds = 4096;
1270                 }
1271
1272                 /* set core file rlimit, if enable_cores is set */
1273                 if (use_rlimit && srv->srvconf.enable_cores && getrlimit(RLIMIT_CORE, &rlim) == 0) {
1274                         rlim.rlim_cur = rlim.rlim_max;
1275                         setrlimit(RLIMIT_CORE, &rlim);
1276                 }
1277 #endif
1278                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
1279                         /* don't raise the limit above FD_SET_SIZE */
1280                         if (srv->max_fds > ((int)FD_SETSIZE) - 200) {
1281                                 log_error_write(srv, __FILE__, __LINE__, "sd",
1282                                                 "can't raise max filedescriptors above",  FD_SETSIZE - 200,
1283                                                 "if event-handler is 'select'. Use 'poll' or something else or reduce server.max-fds.");
1284                                 return -1;
1285                         }
1286                 }
1287         }
1288
1289         /* we need root-perms for port < 1024 */
1290         if (0 != network_init(srv, stdin_fd)) {
1291                 return -1;
1292         }
1293
1294         if (i_am_root) {
1295 #ifdef HAVE_PWD_H
1296                 /* set user and group */
1297                 struct group *grp = NULL;
1298                 struct passwd *pwd = NULL;
1299
1300                 if (!buffer_string_is_empty(srv->srvconf.groupname)) {
1301                         if (NULL == (grp = getgrnam(srv->srvconf.groupname->ptr))) {
1302                                 log_error_write(srv, __FILE__, __LINE__, "sb",
1303                                         "can't find groupname", srv->srvconf.groupname);
1304                                 return -1;
1305                         }
1306                 }
1307
1308                 if (!buffer_string_is_empty(srv->srvconf.username)) {
1309                         if (NULL == (pwd = getpwnam(srv->srvconf.username->ptr))) {
1310                                 log_error_write(srv, __FILE__, __LINE__, "sb",
1311                                                 "can't find username", srv->srvconf.username);
1312                                 return -1;
1313                         }
1314
1315                         if (pwd->pw_uid == 0) {
1316                                 log_error_write(srv, __FILE__, __LINE__, "s",
1317                                                 "I will not set uid to 0\n");
1318                                 return -1;
1319                         }
1320
1321                         if (NULL == grp && NULL == (grp = getgrgid(pwd->pw_gid))) {
1322                                 log_error_write(srv, __FILE__, __LINE__, "sd",
1323                                         "can't find group id", pwd->pw_gid);
1324                                 return -1;
1325                         }
1326                 }
1327
1328                 if (NULL != grp) {
1329                         if (grp->gr_gid == 0) {
1330                                 log_error_write(srv, __FILE__, __LINE__, "s",
1331                                                 "I will not set gid to 0\n");
1332                                 return -1;
1333                         }
1334                 }
1335
1336                 /*
1337                  * Change group before chroot, when we have access
1338                  * to /etc/group
1339                  * */
1340                 if (NULL != grp) {
1341                         if (-1 == setgid(grp->gr_gid)) {
1342                                 log_error_write(srv, __FILE__, __LINE__, "ss", "setgid failed: ", strerror(errno));
1343                                 return -1;
1344                         }
1345                         if (-1 == setgroups(0, NULL)) {
1346                                 log_error_write(srv, __FILE__, __LINE__, "ss", "setgroups failed: ", strerror(errno));
1347                                 return -1;
1348                         }
1349                         if (!buffer_string_is_empty(srv->srvconf.username)) {
1350                                 initgroups(srv->srvconf.username->ptr, grp->gr_gid);
1351                         }
1352                 }
1353 #endif
1354 #ifdef HAVE_CHROOT
1355                 if (!buffer_string_is_empty(srv->srvconf.changeroot)) {
1356                         tzset();
1357
1358                         if (-1 == chroot(srv->srvconf.changeroot->ptr)) {
1359                                 log_error_write(srv, __FILE__, __LINE__, "ss", "chroot failed: ", strerror(errno));
1360                                 return -1;
1361                         }
1362                         if (-1 == chdir("/")) {
1363                                 log_error_write(srv, __FILE__, __LINE__, "ss", "chdir failed: ", strerror(errno));
1364                                 return -1;
1365                         }
1366                 }
1367 #endif
1368 #ifdef HAVE_PWD_H
1369                 /* drop root privs */
1370                 if (NULL != pwd) {
1371                         if (-1 == setuid(pwd->pw_uid)) {
1372                                 log_error_write(srv, __FILE__, __LINE__, "ss", "setuid failed: ", strerror(errno));
1373                                 return -1;
1374                         }
1375                 }
1376 #endif
1377 #if defined(HAVE_SYS_PRCTL_H) && defined(PR_SET_DUMPABLE)
1378                 /**
1379                  * on IRIX 6.5.30 they have prctl() but no DUMPABLE
1380                  */
1381                 if (srv->srvconf.enable_cores) {
1382                         prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
1383                 }
1384 #endif
1385         }
1386
1387         /* set max-conns */
1388         if (srv->srvconf.max_conns > srv->max_fds/2) {
1389                 /* we can't have more connections than max-fds/2 */
1390                 log_error_write(srv, __FILE__, __LINE__, "sdd", "can't have more connections than fds/2: ", srv->srvconf.max_conns, srv->max_fds);
1391                 srv->max_conns = srv->max_fds/2;
1392         } else if (srv->srvconf.max_conns) {
1393                 /* otherwise respect the wishes of the user */
1394                 srv->max_conns = srv->srvconf.max_conns;
1395         } else {
1396                 /* or use the default: we really don't want to hit max-fds */
1397                 srv->max_conns = srv->max_fds/3;
1398         }
1399
1400 #ifdef HAVE_FORK
1401         /* network is up, let's daemonize ourself */
1402         if (0 == srv->srvconf.dont_daemonize && 0 == graceful_restart) {
1403                 parent_pipe_fd = daemonize();
1404         }
1405 #endif
1406         graceful_restart = 0;/*(reset here after avoiding further daemonizing)*/
1407         graceful_shutdown= 0;
1408
1409
1410 #ifdef HAVE_SIGACTION
1411         memset(&act, 0, sizeof(act));
1412         act.sa_handler = SIG_IGN;
1413         sigaction(SIGPIPE, &act, NULL);
1414 # if defined(SA_SIGINFO)
1415         last_sighup_info.si_uid = 0,
1416         last_sighup_info.si_pid = 0;
1417         last_sigterm_info.si_uid = 0,
1418         last_sigterm_info.si_pid = 0;
1419         act.sa_sigaction = sigaction_handler;
1420         sigemptyset(&act.sa_mask);
1421         act.sa_flags = SA_SIGINFO;
1422 # else
1423         act.sa_handler = signal_handler;
1424         sigemptyset(&act.sa_mask);
1425         act.sa_flags = 0;
1426 # endif
1427         sigaction(SIGINT,  &act, NULL);
1428         sigaction(SIGTERM, &act, NULL);
1429         sigaction(SIGHUP,  &act, NULL);
1430         sigaction(SIGALRM, &act, NULL);
1431         sigaction(SIGUSR1, &act, NULL);
1432
1433         /* it should be safe to restart syscalls after SIGCHLD */
1434         act.sa_flags |= SA_RESTART | SA_NOCLDSTOP;
1435         sigaction(SIGCHLD, &act, NULL);
1436
1437 #elif defined(HAVE_SIGNAL)
1438         /* ignore the SIGPIPE from sendfile() */
1439         signal(SIGPIPE, SIG_IGN);
1440         signal(SIGALRM, signal_handler);
1441         signal(SIGTERM, signal_handler);
1442         signal(SIGHUP,  signal_handler);
1443         signal(SIGCHLD,  signal_handler);
1444         signal(SIGINT,  signal_handler);
1445         signal(SIGUSR1, signal_handler);
1446 #endif
1447
1448
1449         srv->gid = getgid();
1450         srv->uid = getuid();
1451         srv->pid = getpid();
1452
1453         /* write pid file */
1454         if (pid_fd > 2) {
1455                 buffer_copy_int(srv->tmp_buf, srv->pid);
1456                 buffer_append_string_len(srv->tmp_buf, CONST_STR_LEN("\n"));
1457                 if (-1 == write_all(pid_fd, CONST_BUF_LEN(srv->tmp_buf))) {
1458                         log_error_write(srv, __FILE__, __LINE__, "ss", "Couldn't write pid file:", strerror(errno));
1459                         close(pid_fd);
1460                         pid_fd = -1;
1461                         return -1;
1462                 }
1463         } else if (pid_fd < -2) {
1464                 pid_fd = -pid_fd;
1465         }
1466
1467         /* Close stderr ASAP in the child process to make sure that nothing
1468          * is being written to that fd which may not be valid anymore. */
1469         if (!srv->srvconf.preflight_check) {
1470                 if (-1 == log_error_open(srv)) {
1471                         log_error_write(srv, __FILE__, __LINE__, "s", "Opening errorlog failed. Going down.");
1472                         return -1;
1473                 }
1474                 log_error_write(srv, __FILE__, __LINE__, "s", "server started (" PACKAGE_DESC ")");
1475         }
1476
1477         if (buffer_is_empty(srv->config_storage[0]->server_tag)) {
1478                 buffer_copy_string_len(srv->config_storage[0]->server_tag, CONST_STR_LEN(PACKAGE_DESC));
1479         }
1480
1481         if (HANDLER_GO_ON != plugins_call_set_defaults(srv)) {
1482                 log_error_write(srv, __FILE__, __LINE__, "s", "Configuration of plugins failed. Going down.");
1483                 return -1;
1484         }
1485
1486         /* settings might be enabled during module config set defaults */
1487         srv->config_storage[0]->high_precision_timestamps = srv->srvconf.high_precision_timestamps;
1488
1489         /* dump unused config-keys */
1490         for (i = 0; i < srv->config_context->used; i++) {
1491                 array *config = ((data_config *)srv->config_context->data[i])->value;
1492                 size_t j;
1493
1494                 for (j = 0; config && j < config->used; j++) {
1495                         data_unset *du = config->data[j];
1496
1497                         /* all var.* is known as user defined variable */
1498                         if (strncmp(du->key->ptr, "var.", sizeof("var.") - 1) == 0) {
1499                                 continue;
1500                         }
1501
1502                         if (NULL == array_get_element_klen(srv->config_touched, CONST_BUF_LEN(du->key))) {
1503                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
1504                                                 "WARNING: unknown config-key:",
1505                                                 du->key,
1506                                                 "(ignored)");
1507                         }
1508                 }
1509         }
1510
1511         if (srv->config_unsupported) {
1512                 log_error_write(srv, __FILE__, __LINE__, "s",
1513                                 "Configuration contains unsupported keys. Going down.");
1514         }
1515
1516         if (srv->config_deprecated) {
1517                 log_error_write(srv, __FILE__, __LINE__, "s",
1518                                 "Configuration contains deprecated keys. Going down.");
1519         }
1520
1521         if (srv->config_unsupported || srv->config_deprecated) {
1522                 return -1;
1523         }
1524
1525         if (srv->srvconf.preflight_check) {
1526                 /*printf("Preflight OK");*//*(stdout reopened to /dev/null)*/
1527                 return 0;
1528         }
1529
1530
1531 #ifdef HAVE_FORK
1532         /**
1533          * notify daemonize-grandparent of successful startup
1534          * do this before any further forking is done (workers)
1535          */
1536         if (0 == srv->srvconf.dont_daemonize && -1 != parent_pipe_fd) {
1537                 if (0 > write(parent_pipe_fd, "", 1)) return -1;
1538                 close(parent_pipe_fd);
1539         }
1540
1541         if (idle_limit && srv->srvconf.max_worker) {
1542                 srv->srvconf.max_worker = 0;
1543                 log_error_write(srv, __FILE__, __LINE__, "s",
1544                                 "server idle time limit command line option disables server.max-worker config file option.");
1545         }
1546
1547         /* start watcher and workers */
1548         num_childs = srv->srvconf.max_worker;
1549         if (num_childs > 0) {
1550                 pid_t pids[num_childs];
1551                 pid_t pid;
1552                 const int npids = num_childs;
1553                 int child = 0;
1554                 unsigned int timer = 0;
1555                 for (int n = 0; n < npids; ++n) pids[n] = -1;
1556                 while (!child && !srv_shutdown && !graceful_shutdown) {
1557                         if (num_childs > 0) {
1558                                 switch ((pid = fork())) {
1559                                 case -1:
1560                                         return -1;
1561                                 case 0:
1562                                         child = 1;
1563                                         alarm(0);
1564                                         break;
1565                                 default:
1566                                         num_childs--;
1567                                         for (int n = 0; n < npids; ++n) {
1568                                                 if (-1 == pids[n]) {
1569                                                         pids[n] = pid;
1570                                                         break;
1571                                                 }
1572                                         }
1573                                         break;
1574                                 }
1575                         } else {
1576                                 int status;
1577
1578                                 if (-1 != (pid = wait(&status))) {
1579                                         srv->cur_ts = time(NULL);
1580                                         if (plugins_call_handle_waitpid(srv, pid, status) != HANDLER_GO_ON) {
1581                                                 if (!timer) alarm((timer = 5));
1582                                                 continue;
1583                                         }
1584                                         switch (fdevent_reaped_logger_pipe(pid)) {
1585                                           default: break;
1586                                           case -1: if (!timer) alarm((timer = 5));
1587                                                    /* fall through */
1588                                           case  1: continue;
1589                                         }
1590                                         /**
1591                                          * check if one of our workers went away
1592                                          */
1593                                         for (int n = 0; n < npids; ++n) {
1594                                                 if (pid == pids[n]) {
1595                                                         pids[n] = -1;
1596                                                         num_childs++;
1597                                                         break;
1598                                                 }
1599                                         }
1600                                 } else {
1601                                         switch (errno) {
1602                                         case EINTR:
1603                                                 srv->cur_ts = time(NULL);
1604                                                 /**
1605                                                  * if we receive a SIGHUP we have to close our logs ourself as we don't
1606                                                  * have the mainloop who can help us here
1607                                                  */
1608                                                 if (handle_sig_hup) {
1609                                                         handle_sig_hup = 0;
1610
1611                                                         log_error_cycle(srv);
1612
1613                                                         /* forward SIGHUP to workers */
1614                                                         for (int n = 0; n < npids; ++n) {
1615                                                                 if (pids[n] > 0) kill(pids[n], SIGHUP);
1616                                                         }
1617                                                 }
1618                                                 if (handle_sig_alarm) {
1619                                                         handle_sig_alarm = 0;
1620                                                         timer = 0;
1621                                                         plugins_call_handle_trigger(srv);
1622                                                         fdevent_restart_logger_pipes(srv->cur_ts);
1623                                                 }
1624                                                 break;
1625                                         default:
1626                                                 break;
1627                                         }
1628                                 }
1629                         }
1630                 }
1631
1632                 /**
1633                  * for the parent this is the exit-point
1634                  */
1635                 if (!child) {
1636                         /**
1637                          * kill all children too
1638                          */
1639                         if (graceful_shutdown || graceful_restart) {
1640                                 /* flag to ignore one SIGINT if graceful_restart */
1641                                 if (graceful_restart) graceful_restart = 2;
1642                                 kill(0, SIGINT);
1643                                 server_graceful_state(srv);
1644                         } else if (srv_shutdown) {
1645                                 kill(0, SIGTERM);
1646                         }
1647
1648                         return 0;
1649                 }
1650
1651                 /* ignore SIGUSR1 in workers; only parent directs graceful restart */
1652               #ifdef HAVE_SIGACTION
1653                 {
1654                         struct sigaction actignore;
1655                         memset(&actignore, 0, sizeof(actignore));
1656                         actignore.sa_handler = SIG_IGN;
1657                         sigaction(SIGUSR1, &actignore, NULL);
1658                 }
1659               #elif defined(HAVE_SIGNAL)
1660                         signal(SIGUSR1, SIG_IGN);
1661               #endif
1662
1663                 /**
1664                  * make sure workers do not muck with pid-file
1665                  */
1666                 if (0 <= pid_fd) {
1667                         close(pid_fd);
1668                         pid_fd = -1;
1669                 }
1670                 buffer_reset(srv->srvconf.pid_file);
1671
1672                 fdevent_clr_logger_pipe_pids();
1673                 srv->pid = getpid();
1674                 li_rand_reseed();
1675         }
1676 #endif
1677
1678         if (NULL == (srv->ev = fdevent_init(srv, srv->max_fds + 1, srv->event_handler))) {
1679                 log_error_write(srv, __FILE__, __LINE__,
1680                                 "s", "fdevent_init failed");
1681                 return -1;
1682         }
1683
1684         /* libev backend overwrites our SIGCHLD handler and calls waitpid on SIGCHLD; we want our own SIGCHLD handling. */
1685 #ifdef HAVE_SIGACTION
1686         sigaction(SIGCHLD, &act, NULL);
1687 #elif defined(HAVE_SIGNAL)
1688         signal(SIGCHLD,  signal_handler);
1689 #endif
1690
1691         /*
1692          * kqueue() is called here, select resets its internals,
1693          * all server sockets get their handlers
1694          *
1695          * */
1696         if (0 != network_register_fdevents(srv)) {
1697                 return -1;
1698         }
1699
1700         /* might fail if user is using fam (not gamin) and famd isn't running */
1701         if (NULL == (srv->stat_cache = stat_cache_init(srv))) {
1702                 log_error_write(srv, __FILE__, __LINE__, "s",
1703                         "stat-cache could not be setup, dieing.");
1704                 return -1;
1705         }
1706
1707 #ifdef USE_ALARM
1708         {
1709                 /* setup periodic timer (1 second) */
1710                 struct itimerval interval;
1711                 interval.it_interval.tv_sec = 1;
1712                 interval.it_interval.tv_usec = 0;
1713                 interval.it_value.tv_sec = 1;
1714                 interval.it_value.tv_usec = 0;
1715                 if (setitimer(ITIMER_REAL, &interval, NULL)) {
1716                         log_error_write(srv, __FILE__, __LINE__, "s", "setting timer failed");
1717                         return -1;
1718                 }
1719         }
1720 #endif
1721
1722
1723         /* get the current number of FDs */
1724         {
1725                 int fd = fdevent_open_devnull();
1726                 if (fd >= 0) {
1727                         srv->cur_fds = fd;
1728                         close(fd);
1729                 }
1730         }
1731
1732         if (0 != server_sockets_set_nb_cloexec(srv)) {
1733                 return -1;
1734         }
1735
1736         if (oneshot_fd && server_oneshot_init(srv, oneshot_fd)) {
1737                 oneshot_fd = -1;
1738         }
1739
1740         /* main-loop */
1741         while (!srv_shutdown) {
1742                 int n;
1743                 size_t ndx;
1744                 time_t min_ts;
1745
1746                 if (handle_sig_hup) {
1747                         handler_t r;
1748
1749                         /* reset notification */
1750                         handle_sig_hup = 0;
1751
1752
1753                         /* cycle logfiles */
1754
1755                         switch(r = plugins_call_handle_sighup(srv)) {
1756                         case HANDLER_GO_ON:
1757                                 break;
1758                         default:
1759                                 log_error_write(srv, __FILE__, __LINE__, "sd", "sighup-handler return with an error", r);
1760                                 break;
1761                         }
1762
1763                         if (-1 == log_error_cycle(srv)) {
1764                                 log_error_write(srv, __FILE__, __LINE__, "s", "cycling errorlog failed, dying");
1765
1766                                 return -1;
1767                         } else {
1768 #ifdef HAVE_SIGACTION
1769                                 log_error_write(srv, __FILE__, __LINE__, "sdsd",
1770                                         "logfiles cycled UID =",
1771                                         last_sighup_info.si_uid,
1772                                         "PID =",
1773                                         last_sighup_info.si_pid);
1774 #else
1775                                 log_error_write(srv, __FILE__, __LINE__, "s",
1776                                         "logfiles cycled");
1777 #endif
1778                         }
1779                 }
1780
1781                 if (handle_sig_alarm) {
1782                         /* a new second */
1783
1784 #ifdef USE_ALARM
1785                         /* reset notification */
1786                         handle_sig_alarm = 0;
1787 #endif
1788
1789                         /* get current time */
1790                         min_ts = time(NULL);
1791
1792                         if (min_ts != srv->cur_ts) {
1793 #ifdef DEBUG_CONNECTION_STATES
1794                                 int cs = 0;
1795 #endif
1796                                 connections *conns = srv->conns;
1797                                 handler_t r;
1798
1799                                 switch(r = plugins_call_handle_trigger(srv)) {
1800                                 case HANDLER_GO_ON:
1801                                         break;
1802                                 case HANDLER_ERROR:
1803                                         log_error_write(srv, __FILE__, __LINE__, "s", "one of the triggers failed");
1804                                         break;
1805                                 default:
1806                                         log_error_write(srv, __FILE__, __LINE__, "d", r);
1807                                         break;
1808                                 }
1809
1810                                 srv->cur_ts = min_ts;
1811
1812                                 /* check idle time limit, if enabled */
1813                                 if (idle_limit && idle_limit < min_ts - last_active_ts && !graceful_shutdown) {
1814                                         log_error_write(srv, __FILE__, __LINE__, "sDs", "[note] idle timeout", (int)idle_limit,
1815                                                         "s exceeded, initiating graceful shutdown");
1816                                         graceful_shutdown = 2; /* value 2 indicates idle timeout */
1817                                         if (graceful_restart) {
1818                                                 graceful_restart = 0;
1819                                                 if (pid_fd < -2) pid_fd = -pid_fd;
1820                                                 server_sockets_close(srv);
1821                                         }
1822                                 }
1823
1824                               #ifdef HAVE_GETLOADAVG
1825                                 /* refresh loadavg data every 30 seconds */
1826                                 if (srv->srvconf.loadts + 30 < min_ts) {
1827                                         if (-1 != getloadavg(srv->srvconf.loadavg, 3)) {
1828                                                 srv->srvconf.loadts = min_ts;
1829                                         }
1830                                 }
1831                               #endif
1832
1833                                 /* cleanup stat-cache */
1834                                 stat_cache_trigger_cleanup(srv);
1835                                 /* reset global/aggregate rate limit counters */
1836                                 for (i = 0; i < srv->config_context->used; ++i) {
1837                                         srv->config_storage[i]->global_bytes_per_second_cnt = 0;
1838                                 }
1839                                 /* if graceful_shutdown, accelerate cleanup of recently completed request/responses */
1840                                 if (graceful_shutdown && !srv_shutdown) server_graceful_shutdown_maint(srv);
1841                                 /**
1842                                  * check all connections for timeouts
1843                                  *
1844                                  */
1845                                 for (ndx = 0; ndx < conns->used; ndx++) {
1846                                         connection * const con = conns->ptr[ndx];
1847                                         const int waitevents = fdevent_event_get_interest(srv->ev, con->fd);
1848                                         int changed = 0;
1849                                         int t_diff;
1850
1851                                         if (con->state == CON_STATE_CLOSE) {
1852                                                 if (srv->cur_ts - con->close_timeout_ts > HTTP_LINGER_TIMEOUT) {
1853                                                         changed = 1;
1854                                                 }
1855                                         } else if (waitevents & FDEVENT_IN) {
1856                                                 if (con->request_count == 1 || con->state != CON_STATE_READ) { /* e.g. CON_STATE_READ_POST || CON_STATE_WRITE */
1857                                                         if (srv->cur_ts - con->read_idle_ts > con->conf.max_read_idle) {
1858                                                                 /* time - out */
1859                                                                 if (con->conf.log_request_handling) {
1860                                                                         log_error_write(srv, __FILE__, __LINE__, "sd",
1861                                                                                 "connection closed - read timeout:", con->fd);
1862                                                                 }
1863
1864                                                                 connection_set_state(srv, con, CON_STATE_ERROR);
1865                                                                 changed = 1;
1866                                                         }
1867                                                 } else {
1868                                                         if (srv->cur_ts - con->read_idle_ts > con->keep_alive_idle) {
1869                                                                 /* time - out */
1870                                                                 if (con->conf.log_request_handling) {
1871                                                                         log_error_write(srv, __FILE__, __LINE__, "sd",
1872                                                                                 "connection closed - keep-alive timeout:", con->fd);
1873                                                                 }
1874
1875                                                                 connection_set_state(srv, con, CON_STATE_ERROR);
1876                                                                 changed = 1;
1877                                                         }
1878                                                 }
1879                                         }
1880
1881                                         /* max_write_idle timeout currently functions as backend timeout,
1882                                          * too, after response has been started.
1883                                          * future: have separate backend timeout, and then change this
1884                                          * to check for write interest before checking for timeout */
1885                                         /*if (waitevents & FDEVENT_OUT)*/
1886                                         if ((con->state == CON_STATE_WRITE) &&
1887                                             (con->write_request_ts != 0)) {
1888 #if 0
1889                                                 if (srv->cur_ts - con->write_request_ts > 60) {
1890                                                         log_error_write(srv, __FILE__, __LINE__, "sdd",
1891                                                                         "connection closed - pre-write-request-timeout:", con->fd, srv->cur_ts - con->write_request_ts);
1892                                                 }
1893 #endif
1894
1895                                                 if (srv->cur_ts - con->write_request_ts > con->conf.max_write_idle) {
1896                                                         /* time - out */
1897                                                         if (con->conf.log_timeouts) {
1898                                                                 log_error_write(srv, __FILE__, __LINE__, "sbsbsosds",
1899                                                                         "NOTE: a request from",
1900                                                                         con->dst_addr_buf,
1901                                                                         "for",
1902                                                                         con->request.uri,
1903                                                                         "timed out after writing",
1904                                                                         con->bytes_written,
1905                                                                         "bytes. We waited",
1906                                                                         (int)con->conf.max_write_idle,
1907                                                                         "seconds. If this a problem increase server.max-write-idle");
1908                                                         }
1909                                                         connection_set_state(srv, con, CON_STATE_ERROR);
1910                                                         changed = 1;
1911                                                 }
1912                                         }
1913
1914                                         /* we don't like div by zero */
1915                                         if (0 == (t_diff = srv->cur_ts - con->connection_start)) t_diff = 1;
1916
1917                                         if (con->traffic_limit_reached &&
1918                                             (con->conf.kbytes_per_second == 0 ||
1919                                              ((con->bytes_written / t_diff) < con->conf.kbytes_per_second * 1024))) {
1920                                                 /* enable connection again */
1921                                                 con->traffic_limit_reached = 0;
1922
1923                                                 changed = 1;
1924                                         }
1925
1926                                         con->bytes_written_cur_second = 0;
1927
1928                                         if (changed) {
1929                                                 connection_state_machine(srv, con);
1930                                         }
1931
1932 #if DEBUG_CONNECTION_STATES
1933                                         if (cs == 0) {
1934                                                 fprintf(stderr, "connection-state: ");
1935                                                 cs = 1;
1936                                         }
1937
1938                                         fprintf(stderr, "c[%d,%d]: %s ",
1939                                                 con->fd,
1940                                                 con->fcgi.fd,
1941                                                 connection_get_state(con->state));
1942 #endif
1943                                 }
1944
1945 #ifdef DEBUG_CONNECTION_STATES
1946                                 if (cs == 1) fprintf(stderr, "\n");
1947 #endif
1948                         }
1949                 }
1950
1951                 if (handle_sig_child) {
1952                         pid_t pid;
1953                         handle_sig_child = 0;
1954                         do {
1955                                 int status;
1956                                 pid = waitpid(-1, &status, WNOHANG);
1957                                 if (pid > 0) {
1958                                         if (plugins_call_handle_waitpid(srv, pid, status) != HANDLER_GO_ON) {
1959                                                 continue;
1960                                         }
1961                                         if (0 == srv->srvconf.max_worker) {
1962                                                 /* check piped-loggers and restart, even if shutting down */
1963                                                 if (fdevent_waitpid_logger_pipe_pid(pid, srv->cur_ts)) {
1964                                                         continue;
1965                                                 }
1966                                         }
1967                                 }
1968                         } while (pid > 0 || (-1 == pid && errno == EINTR));
1969                 }
1970
1971                 if (graceful_shutdown) {
1972                         server_graceful_state(srv);
1973                         srv->sockets_disabled = 1;
1974                 } else if (srv->sockets_disabled) {
1975                         /* our server sockets are disabled, why ? */
1976
1977                         if ((srv->cur_fds + srv->want_fds < srv->max_fds * 8 / 10) && /* we have enough unused fds */
1978                             (srv->conns->used <= srv->max_conns * 9 / 10)) {
1979                                 server_sockets_set_event(srv, FDEVENT_IN);
1980                                 log_error_write(srv, __FILE__, __LINE__, "s", "[note] sockets enabled again");
1981
1982                                 srv->sockets_disabled = 0;
1983                         }
1984                 } else {
1985                         if ((srv->cur_fds + srv->want_fds > srv->max_fds * 9 / 10) || /* out of fds */
1986                             (srv->conns->used >= srv->max_conns)) { /* out of connections */
1987                                 /* disable server-fds */
1988                                 server_sockets_set_event(srv, 0);
1989
1990                                 if (srv->conns->used >= srv->max_conns) {
1991                                         log_error_write(srv, __FILE__, __LINE__, "s", "[note] sockets disabled, connection limit reached");
1992                                 } else {
1993                                         log_error_write(srv, __FILE__, __LINE__, "s", "[note] sockets disabled, out-of-fds");
1994                                 }
1995
1996                                 srv->sockets_disabled = 1;
1997                         }
1998                 }
1999
2000                 if (graceful_shutdown && srv->conns->used == 0) {
2001                         /* we are in graceful shutdown phase and all connections are closed
2002                          * we are ready to terminate without harming anyone */
2003                         srv_shutdown = 1;
2004                         break;
2005                 }
2006
2007                 /* we still have some fds to share */
2008                 if (srv->want_fds) {
2009                         /* check the fdwaitqueue for waiting fds */
2010                         int free_fds = srv->max_fds - srv->cur_fds - 16;
2011                         connection *con;
2012
2013                         for (; free_fds > 0 && NULL != (con = fdwaitqueue_unshift(srv, srv->fdwaitqueue)); free_fds--) {
2014                                 connection_state_machine(srv, con);
2015
2016                                 srv->want_fds--;
2017                         }
2018                 }
2019
2020                 if ((n = fdevent_poll(srv->ev, 1000)) > 0) {
2021                         /* n is the number of events */
2022                         int fd;
2023                         int revents;
2024                         int fd_ndx;
2025                         last_active_ts = srv->cur_ts;
2026                         fd_ndx = -1;
2027                         do {
2028                                 fdevent_handler handler;
2029                                 void *context;
2030
2031                                 fd_ndx  = fdevent_event_next_fdndx (srv->ev, fd_ndx);
2032                                 if (-1 == fd_ndx) break; /* not all fdevent handlers know how many fds got an event */
2033
2034                                 revents = fdevent_event_get_revent (srv->ev, fd_ndx);
2035                                 fd      = fdevent_event_get_fd     (srv->ev, fd_ndx);
2036                                 handler = fdevent_get_handler(srv->ev, fd);
2037                                 context = fdevent_get_context(srv->ev, fd);
2038                                 if (NULL != handler) {
2039                                         (*handler)(srv, context, revents);
2040                                 }
2041                         } while (--n > 0);
2042                 } else if (n < 0 && errno != EINTR) {
2043                         log_error_write(srv, __FILE__, __LINE__, "ss",
2044                                         "fdevent_poll failed:",
2045                                         strerror(errno));
2046                 }
2047
2048                 if (n >= 0) fdevent_sched_run(srv, srv->ev);
2049
2050                 for (ndx = 0; ndx < srv->joblist->used; ndx++) {
2051                         connection *con = srv->joblist->ptr[ndx];
2052                         connection_state_machine(srv, con);
2053                 }
2054
2055                 srv->joblist->used = 0;
2056         }
2057
2058         if (graceful_shutdown || graceful_restart) {
2059                 server_graceful_state(srv);
2060         }
2061
2062         if (2 == graceful_shutdown) { /* value 2 indicates idle timeout */
2063                 log_error_write(srv, __FILE__, __LINE__, "s",
2064                                 "server stopped after idle timeout");
2065         } else {
2066 #ifdef HAVE_SIGACTION
2067                 log_error_write(srv, __FILE__, __LINE__, "sdsd",
2068                                 "server stopped by UID =",
2069                                 last_sigterm_info.si_uid,
2070                                 "PID =",
2071                                 last_sigterm_info.si_pid);
2072 #else
2073                 log_error_write(srv, __FILE__, __LINE__, "s",
2074                                 "server stopped");
2075 #endif
2076         }
2077
2078         return 0;
2079 }
2080
2081 int main (int argc, char **argv) {
2082     int rc;
2083
2084   #ifdef HAVE_GETUID
2085   #ifndef HAVE_ISSETUGID
2086   #define issetugid() (geteuid() != getuid() || getegid() != getgid())
2087   #endif
2088     if (0 != getuid() && issetugid()) { /*check as early as possible in main()*/
2089         fprintf(stderr,
2090                 "Are you nuts ? Don't apply a SUID bit to this binary\n");
2091         return -1;
2092     }
2093   #endif
2094
2095     /* for nice %b handling in strftime() */
2096     setlocale(LC_TIME, "C");
2097
2098     do {
2099         server * const srv = server_init();
2100
2101         if (graceful_restart) {
2102             server_sockets_restore(srv);
2103             optind = 1;
2104         }
2105
2106         rc = server_main(srv, argc, argv);
2107
2108         /* clean-up */
2109         remove_pid_file(srv);
2110         log_error_close(srv);
2111         fdevent_close_logger_pipes();
2112         if (graceful_restart)
2113             server_sockets_save(srv);
2114         else
2115             network_close(srv);
2116         connections_free(srv);
2117         plugins_free(srv);
2118         server_free(srv);
2119
2120         if (0 != rc || !graceful_restart) break;
2121
2122         /* wait for all children to exit before graceful restart */
2123         while (waitpid(-1, NULL, 0) > 0) ;
2124     } while (graceful_restart);
2125
2126     return rc;
2127 }