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 "stat_cache.h"
  18 #include "plugin.h"
  19 #include "joblist.h"
  20 #include "network_backends.h"
  21
  22 #ifdef HAVE_VERSIONSTAMP_H
  23 # include "versionstamp.h"
  24 #else
  25 # define REPO_VERSION ""
  26 #endif
  27
  28 #define PACKAGE_DESC PACKAGE_NAME "/" PACKAGE_VERSION REPO_VERSION
  29
  30 #include <sys/types.h>
  31 #include <sys/time.h>
  32 #include <sys/stat.h>
  33 #include <sys/wait.h>
  34
  35 #include <string.h>
  36 #include <errno.h>
  37 #include <fcntl.h>
  38 #include <unistd.h>
  39 #include <stdlib.h>
  40 #include <time.h>
  41 #include <signal.h>
  42 #include <locale.h>
  43
  44 #include <stdio.h>
  45
  46 #ifdef HAVE_GETOPT_H
  47 # include <getopt.h>
  48 #endif
  49
  50 #ifdef HAVE_VALGRIND_VALGRIND_H
  51 # include <valgrind/valgrind.h>
  52 #endif
  53
  54 #ifdef HAVE_SYS_WAIT_H
  55 # include <sys/wait.h>
  56 #endif
  57
  58 #ifdef HAVE_PWD_H
  59 # include <grp.h>
  60 # include <pwd.h>
  61 #endif
  62
  63 #ifdef HAVE_SYSLOG_H
  64 # include <syslog.h>
  65 #endif
  66
  67 #ifdef HAVE_SYS_RESOURCE_H
  68 # include <sys/resource.h>
  69 #endif
  70
  71 #ifdef HAVE_SYS_PRCTL_H
  72 # include <sys/prctl.h>
  73 #endif
  74
  75 #if defined HAVE_LIBSSL && defined HAVE_OPENSSL_SSL_H
  76 #define USE_SSL
  77 #define TEXT_SSL " (ssl)"
  78 #else
  79 #define TEXT_SSL
  80 #endif
  81
  82 #ifndef __sgi
  83 /* IRIX doesn't like the alarm based time() optimization */
  84 /* #define USE_ALARM */
  85 #endif
  86
  87 static int oneshot_fd = 0;
  88 static volatile int pid_fd = -1;
  89 static server_socket_array graceful_sockets;
  90 static volatile sig_atomic_t graceful_restart = 0;
  91 static volatile sig_atomic_t graceful_shutdown = 0;
  92 static volatile sig_atomic_t srv_shutdown = 0;
  93 static volatile sig_atomic_t handle_sig_alarm = 1;
  94 static volatile sig_atomic_t handle_sig_hup = 0;
  95 static volatile sig_atomic_t forwarded_sig_hup = 0;
  96
  97 #if defined(HAVE_SIGACTION) && defined(SA_SIGINFO)
  98 static volatile siginfo_t last_sigterm_info;
  99 static volatile siginfo_t last_sighup_info;
 100
 101 static void sigaction_handler(int sig, siginfo_t *si, void *context) {
 102         static siginfo_t empty_siginfo;
 103         UNUSED(context);
 104
 105         if (!si) si = &empty_siginfo;
 106
 107         switch (sig) {
 108         case SIGTERM:
 109                 srv_shutdown = 1;
 110                 last_sigterm_info = *si;
 111                 break;
 112         case SIGUSR1:
 113                 if (!graceful_shutdown) {
 114                         graceful_restart = 1;
 115                         graceful_shutdown = 1;
 116                         last_sigterm_info = *si;
 117                 }
 118                 break;
 119         case SIGINT:
 120                 if (graceful_shutdown) {
 121                         if (2 == graceful_restart)
 122                                 graceful_restart = 1;
 123                         else
 124                                 srv_shutdown = 1;
 125                 } else {
 126                         graceful_shutdown = 1;
 127                 }
 128                 last_sigterm_info = *si;
 129
 130                 break;
 131         case SIGALRM:
 132                 handle_sig_alarm = 1;
 133                 break;
 134         case SIGHUP:
 135                 /**
 136                  * we send the SIGHUP to all procs in the process-group
 137                  * this includes ourself
 138                  *
 139                  * make sure we only send it once and don't create a
 140                  * infinite loop
 141                  */
 142                 if (!forwarded_sig_hup) {
 143                         handle_sig_hup = 1;
 144                         last_sighup_info = *si;
 145                 } else {
 146                         forwarded_sig_hup = 0;
 147                 }
 148                 break;
 149         case SIGCHLD:
 150                 break;
 151         }
 152 }
 153 #elif defined(HAVE_SIGNAL) || defined(HAVE_SIGACTION)
 154 static void signal_handler(int sig) {
 155         switch (sig) {
 156         case SIGTERM: srv_shutdown = 1; break;
 157         case SIGINT:
 158                 if (graceful_shutdown) {
 159                         if (2 == graceful_restart)
 160                                 graceful_restart = 1;
 161                         else
 162                                 srv_shutdown = 1;
 163                 } else {
 164                         graceful_shutdown = 1;
 165                 }
 166                 break;
 167         case SIGALRM: handle_sig_alarm = 1; break;
 168         case SIGHUP:  handle_sig_hup = 1; break;
 169         case SIGCHLD:  break;
 170         }
 171 }
 172 #endif
 173
 174 #ifdef HAVE_FORK
 175 static int daemonize(void) {
 176         int pipefd[2];
 177         pid_t pid;
 178 #ifdef SIGTTOU
 179         signal(SIGTTOU, SIG_IGN);
 180 #endif
 181 #ifdef SIGTTIN
 182         signal(SIGTTIN, SIG_IGN);
 183 #endif
 184 #ifdef SIGTSTP
 185         signal(SIGTSTP, SIG_IGN);
 186 #endif
 187
 188         if (pipe(pipefd) < 0) exit(-1);
 189
 190         if (0 > (pid = fork())) exit(-1);
 191
 192         if (0 < pid) {
 193                 char buf;
 194                 ssize_t bytes;
 195
 196                 close(pipefd[1]);
 197                 /* parent waits for grandchild to be ready */
 198                 do {
 199                         bytes = read(pipefd[0], &buf, sizeof(buf));
 200                 } while (bytes < 0 && EINTR == errno);
 201                 close(pipefd[0]);
 202
 203                 if (bytes <= 0) {
 204                         /* closed fd (without writing) == failure in grandchild */
 205                         fputs("daemonized server failed to start; check error log for details\n", stderr);
 206                         exit(-1);
 207                 }
 208
 209                 exit(0);
 210         }
 211
 212         close(pipefd[0]);
 213
 214         if (-1 == setsid()) exit(0);
 215
 216         signal(SIGHUP, SIG_IGN);
 217
 218         if (0 != fork()) exit(0);
 219
 220         if (0 != chdir("/")) exit(0);
 221
 222         fdevent_setfd_cloexec(pipefd[1]);
 223         return pipefd[1];
 224 }
 225 #endif
 226
 227 static server *server_init(void) {
 228         int i;
 229         server *srv = calloc(1, sizeof(*srv));
 230         force_assert(srv);
 231 #define CLEAN(x) \
 232         srv->x = buffer_init();
 233
 234         CLEAN(response_header);
 235         CLEAN(parse_full_path);
 236         CLEAN(ts_debug_str);
 237         CLEAN(ts_date_str);
 238         CLEAN(errorlog_buf);
 239         CLEAN(response_range);
 240         CLEAN(tmp_buf);
 241         srv->empty_string = buffer_init_string("");
 242         CLEAN(cond_check_buf);
 243
 244         CLEAN(srvconf.errorlog_file);
 245         CLEAN(srvconf.breakagelog_file);
 246         CLEAN(srvconf.groupname);
 247         CLEAN(srvconf.username);
 248         CLEAN(srvconf.changeroot);
 249         CLEAN(srvconf.bindhost);
 250         CLEAN(srvconf.event_handler);
 251         CLEAN(srvconf.pid_file);
 252         CLEAN(srvconf.syslog_facility);
 253
 254         CLEAN(tmp_chunk_len);
 255 #undef CLEAN
 256
 257 #define CLEAN(x) \
 258         srv->x = array_init();
 259
 260         CLEAN(config_context);
 261         CLEAN(config_touched);
 262         CLEAN(status);
 263 #undef CLEAN
 264
 265         for (i = 0; i < FILE_CACHE_MAX; i++) {
 266                 srv->mtime_cache[i].mtime = (time_t)-1;
 267                 srv->mtime_cache[i].str = buffer_init();
 268         }
 269
 270         li_rand_reseed();
 271
 272         srv->cur_ts = time(NULL);
 273         srv->startup_ts = srv->cur_ts;
 274
 275         srv->conns = calloc(1, sizeof(*srv->conns));
 276         force_assert(srv->conns);
 277
 278         srv->joblist = calloc(1, sizeof(*srv->joblist));
 279         force_assert(srv->joblist);
 280
 281         srv->fdwaitqueue = calloc(1, sizeof(*srv->fdwaitqueue));
 282         force_assert(srv->fdwaitqueue);
 283
 284         srv->srvconf.modules = array_init();
 285         srv->srvconf.modules_dir = buffer_init_string(LIBRARY_DIR);
 286         srv->srvconf.network_backend = buffer_init();
 287         srv->srvconf.upload_tempdirs = array_init();
 288         srv->srvconf.reject_expect_100_with_417 = 1;
 289         srv->srvconf.xattr_name = buffer_init_string("Content-Type");
 290         srv->srvconf.http_header_strict  = 1;
 291         srv->srvconf.http_host_strict    = 1; /*(implies http_host_normalize)*/
 292         srv->srvconf.http_host_normalize = 0;
 293         srv->srvconf.high_precision_timestamps = 0;
 294         srv->srvconf.max_request_field_size = 8192;
 295         srv->srvconf.loadavg[0] = 0.0;
 296         srv->srvconf.loadavg[1] = 0.0;
 297         srv->srvconf.loadavg[2] = 0.0;
 298
 299         /* use syslog */
 300         srv->errorlog_fd = STDERR_FILENO;
 301         srv->errorlog_mode = ERRORLOG_FD;
 302
 303         srv->split_vals = array_init();
 304         srv->request_env = plugins_call_handle_request_env;
 305
 306         return srv;
 307 }
 308
 309 static void server_free(server *srv) {
 310         size_t i;
 311
 312         for (i = 0; i < FILE_CACHE_MAX; i++) {
 313                 buffer_free(srv->mtime_cache[i].str);
 314         }
 315
 316         if (oneshot_fd > 0) {
 317                 close(oneshot_fd);
 318         }
 319
 320 #define CLEAN(x) \
 321         buffer_free(srv->x);
 322
 323         CLEAN(response_header);
 324         CLEAN(parse_full_path);
 325         CLEAN(ts_debug_str);
 326         CLEAN(ts_date_str);
 327         CLEAN(errorlog_buf);
 328         CLEAN(response_range);
 329         CLEAN(tmp_buf);
 330         CLEAN(empty_string);
 331         CLEAN(cond_check_buf);
 332
 333         CLEAN(srvconf.errorlog_file);
 334         CLEAN(srvconf.breakagelog_file);
 335         CLEAN(srvconf.groupname);
 336         CLEAN(srvconf.username);
 337         CLEAN(srvconf.changeroot);
 338         CLEAN(srvconf.bindhost);
 339         CLEAN(srvconf.event_handler);
 340         CLEAN(srvconf.pid_file);
 341         CLEAN(srvconf.modules_dir);
 342         CLEAN(srvconf.network_backend);
 343         CLEAN(srvconf.xattr_name);
 344         CLEAN(srvconf.syslog_facility);
 345
 346         CLEAN(tmp_chunk_len);
 347 #undef CLEAN
 348
 349 #if 0
 350         fdevent_unregister(srv->ev, srv->fd);
 351 #endif
 352         fdevent_free(srv->ev);
 353
 354         free(srv->conns);
 355
 356         if (srv->config_storage) {
 357                 for (i = 0; i < srv->config_context->used; i++) {
 358                         specific_config *s = srv->config_storage[i];
 359
 360                         if (!s) continue;
 361
 362                         buffer_free(s->document_root);
 363                         buffer_free(s->server_name);
 364                         buffer_free(s->server_tag);
 365                         buffer_free(s->error_handler);
 366                         buffer_free(s->error_handler_404);
 367                         buffer_free(s->errorfile_prefix);
 368                         buffer_free(s->socket_perms);
 369                         array_free(s->mimetypes);
 370                         free(s);
 371                 }
 372                 free(srv->config_storage);
 373                 srv->config_storage = NULL;
 374         }
 375
 376 #define CLEAN(x) \
 377         array_free(srv->x);
 378
 379         CLEAN(config_context);
 380         CLEAN(config_touched);
 381         CLEAN(status);
 382         CLEAN(srvconf.upload_tempdirs);
 383 #undef CLEAN
 384
 385         joblist_free(srv, srv->joblist);
 386         fdwaitqueue_free(srv, srv->fdwaitqueue);
 387
 388         if (srv->stat_cache) {
 389                 stat_cache_free(srv->stat_cache);
 390         }
 391
 392         array_free(srv->srvconf.modules);
 393         array_free(srv->split_vals);
 394
 395         li_rand_cleanup();
 396
 397         free(srv);
 398 }
 399
 400 static void remove_pid_file(server *srv) {
 401         if (pid_fd < -2) return;
 402         if (!buffer_string_is_empty(srv->srvconf.pid_file) && 0 <= pid_fd) {
 403                 if (0 != ftruncate(pid_fd, 0)) {
 404                         log_error_write(srv, __FILE__, __LINE__, "sbds",
 405                                         "ftruncate failed for:",
 406                                         srv->srvconf.pid_file,
 407                                         errno,
 408                                         strerror(errno));
 409                 }
 410         }
 411         if (0 <= pid_fd) {
 412                 close(pid_fd);
 413                 pid_fd = -1;
 414         }
 415         if (!buffer_string_is_empty(srv->srvconf.pid_file) &&
 416             buffer_string_is_empty(srv->srvconf.changeroot)) {
 417                 if (0 != unlink(srv->srvconf.pid_file->ptr)) {
 418                         if (errno != EACCES && errno != EPERM) {
 419                                 log_error_write(srv, __FILE__, __LINE__, "sbds",
 420                                                 "unlink failed for:",
 421                                                 srv->srvconf.pid_file,
 422                                                 errno,
 423                                                 strerror(errno));
 424                         }
 425                 }
 426         }
 427 }
 428
 429
 430 static server_socket * server_oneshot_getsock(server *srv, sock_addr *cnt_addr) {
 431         server_socket *srv_socket, *srv_socket_wild = NULL;
 432         size_t i;
 433         for (i = 0; i < srv->srv_sockets.used; ++i) {
 434                 srv_socket = srv->srv_sockets.ptr[i];
 435                 if (cnt_addr->plain.sa_family != srv_socket->addr.plain.sa_family) continue;
 436                 switch (cnt_addr->plain.sa_family) {
 437                 case AF_INET:
 438                         if (srv_socket->addr.ipv4.sin_port != cnt_addr->ipv4.sin_port) continue;
 439                         if (srv_socket->addr.ipv4.sin_addr.s_addr == cnt_addr->ipv4.sin_addr.s_addr) {
 440                                 return srv_socket;
 441                         }
 442                         if (srv_socket->addr.ipv4.sin_addr.s_addr == htonl(INADDR_ANY)) {
 443                                 srv_socket_wild = srv_socket;
 444                         }
 445                         continue;
 446                 #ifdef HAVE_IPV6
 447                 case AF_INET6:
 448                         if (srv_socket->addr.ipv6.sin6_port != cnt_addr->ipv6.sin6_port) continue;
 449                         if (0 == memcmp(&srv_socket->addr.ipv6.sin6_addr, &cnt_addr->ipv6.sin6_addr, sizeof(struct in6_addr))) {
 450                                 return srv_socket;
 451                         }
 452                         if (0 == memcmp(&srv_socket->addr.ipv6.sin6_addr, &in6addr_any, sizeof(struct in6_addr))) {
 453                                 srv_socket_wild = srv_socket;
 454                         }
 455                         continue;
 456                 #endif
 457                 #ifdef HAVE_SYS_UN_H
 458                 case AF_UNIX:
 459                         if (0 == strcmp(srv_socket->addr.un.sun_path, cnt_addr->un.sun_path)) {
 460                                 return srv_socket;
 461                         }
 462                         continue;
 463                 #endif
 464                 default: continue;
 465                 }
 466         }
 467
 468         if (NULL != srv_socket_wild) {
 469                 return srv_socket_wild;
 470         } else if (srv->srv_sockets.used) {
 471                 return srv->srv_sockets.ptr[0];
 472         } else {
 473                 log_error_write(srv, __FILE__, __LINE__, "s", "no sockets configured");
 474                 return NULL;
 475         }
 476 }
 477
 478
 479 static int server_oneshot_init(server *srv, int fd) {
 480         /* Note: does not work with netcat due to requirement that fd be socket.
 481          * STDOUT_FILENO was not saved earlier in startup, and that is to where
 482          * netcat expects output to be sent.  Since lighttpd expects connections
 483          * to be sockets, con->fd is where output is sent; separate fds are not
 484          * stored for input and output, but netcat has different fds for stdin
 485          * and * stdout.  To support netcat, would additionally need to avoid
 486          * S_ISSOCK(), getsockname(), and getpeername() below, reconstructing
 487          * addresses from environment variables:
 488          *   NCAT_LOCAL_ADDR   NCAT_LOCAL_PORT
 489          *   NCAT_REMOTE_ADDR  NCAT_REMOTE_PORT
 490          *   NCAT_PROTO
 491          */
 492         connection *con;
 493         server_socket *srv_socket;
 494         sock_addr cnt_addr;
 495         socklen_t cnt_len;
 496         struct stat st;
 497
 498         if (0 != fstat(fd, &st)) {
 499                 log_error_write(srv, __FILE__, __LINE__, "ss", "fstat:", strerror(errno));
 500                 return 0;
 501         }
 502
 503         if (!S_ISSOCK(st.st_mode)) {
 504                 /* require that fd is a socket
 505                  * (modules might expect STDIN_FILENO and STDOUT_FILENO opened to /dev/null) */
 506                 log_error_write(srv, __FILE__, __LINE__, "s", "lighttpd -1 stdin is not a socket");
 507                 return 0;
 508         }
 509
 510         cnt_len = sizeof(cnt_addr);
 511         if (0 != getsockname(fd, (struct sockaddr *)&cnt_addr, &cnt_len)) {
 512                 log_error_write(srv, __FILE__, __LINE__, "ss", "getsockname:", strerror(errno));
 513                 return 0;
 514         }
 515
 516         srv_socket = server_oneshot_getsock(srv, &cnt_addr);
 517         if (NULL == srv_socket) return 0;
 518
 519         cnt_len = sizeof(cnt_addr);
 520         if (0 != getpeername(fd, (struct sockaddr *)&cnt_addr, &cnt_len)) {
 521                 log_error_write(srv, __FILE__, __LINE__, "ss", "getpeername:", strerror(errno));
 522                 return 0;
 523         }
 524
 525         if (cnt_addr.plain.sa_family != AF_UNIX) {
 526                 network_accept_tcp_nagle_disable(fd);
 527         }
 528
 529         con = connection_accepted(srv, srv_socket, &cnt_addr, fd);
 530         if (NULL == con) return 0;
 531
 532         connection_state_machine(srv, con);
 533         return 1;
 534 }
 535
 536
 537 static void show_version (void) {
 538         char *b = PACKAGE_DESC TEXT_SSL \
 539 " - a light and fast webserver\n" \
 540 "Build-Date: " __DATE__ " " __TIME__ "\n";
 541 ;
 542         write_all(STDOUT_FILENO, b, strlen(b));
 543 }
 544
 545 static void show_features (void) {
 546   const char features[] = ""
 547 #ifdef USE_SELECT
 548       "\t+ select (generic)\n"
 549 #else
 550       "\t- select (generic)\n"
 551 #endif
 552 #ifdef USE_POLL
 553       "\t+ poll (Unix)\n"
 554 #else
 555       "\t- poll (Unix)\n"
 556 #endif
 557 #ifdef USE_LINUX_EPOLL
 558       "\t+ epoll (Linux 2.6)\n"
 559 #else
 560       "\t- epoll (Linux 2.6)\n"
 561 #endif
 562 #ifdef USE_SOLARIS_DEVPOLL
 563       "\t+ /dev/poll (Solaris)\n"
 564 #else
 565       "\t- /dev/poll (Solaris)\n"
 566 #endif
 567 #ifdef USE_SOLARIS_PORT
 568       "\t+ eventports (Solaris)\n"
 569 #else
 570       "\t- eventports (Solaris)\n"
 571 #endif
 572 #ifdef USE_FREEBSD_KQUEUE
 573       "\t+ kqueue (FreeBSD)\n"
 574 #else
 575       "\t- kqueue (FreeBSD)\n"
 576 #endif
 577 #ifdef USE_LIBEV
 578       "\t+ libev (generic)\n"
 579 #else
 580       "\t- libev (generic)\n"
 581 #endif
 582       "\nNetwork handler:\n\n"
 583 #if defined USE_LINUX_SENDFILE
 584       "\t+ linux-sendfile\n"
 585 #else
 586       "\t- linux-sendfile\n"
 587 #endif
 588 #if defined USE_FREEBSD_SENDFILE
 589       "\t+ freebsd-sendfile\n"
 590 #else
 591       "\t- freebsd-sendfile\n"
 592 #endif
 593 #if defined USE_DARWIN_SENDFILE
 594       "\t+ darwin-sendfile\n"
 595 #else
 596       "\t- darwin-sendfile\n"
 597 #endif
 598 #if defined USE_SOLARIS_SENDFILEV
 599       "\t+ solaris-sendfilev\n"
 600 #else
 601       "\t- solaris-sendfilev\n"
 602 #endif
 603 #if defined USE_WRITEV
 604       "\t+ writev\n"
 605 #else
 606       "\t- writev\n"
 607 #endif
 608       "\t+ write\n"
 609 #ifdef USE_MMAP
 610       "\t+ mmap support\n"
 611 #else
 612       "\t- mmap support\n"
 613 #endif
 614       "\nFeatures:\n\n"
 615 #ifdef HAVE_IPV6
 616       "\t+ IPv6 support\n"
 617 #else
 618       "\t- IPv6 support\n"
 619 #endif
 620 #if defined HAVE_ZLIB_H && defined HAVE_LIBZ
 621       "\t+ zlib support\n"
 622 #else
 623       "\t- zlib support\n"
 624 #endif
 625 #if defined HAVE_BZLIB_H && defined HAVE_LIBBZ2
 626       "\t+ bzip2 support\n"
 627 #else
 628       "\t- bzip2 support\n"
 629 #endif
 630 #if defined(HAVE_CRYPT) || defined(HAVE_CRYPT_R) || defined(HAVE_LIBCRYPT)
 631       "\t+ crypt support\n"
 632 #else
 633       "\t- crypt support\n"
 634 #endif
 635 #ifdef USE_SSL
 636       "\t+ SSL support\n"
 637 #else
 638       "\t- SSL support\n"
 639 #endif
 640 #ifdef HAVE_LIBPCRE
 641       "\t+ PCRE support\n"
 642 #else
 643       "\t- PCRE support\n"
 644 #endif
 645 #ifdef HAVE_MYSQL
 646       "\t+ MySQL support\n"
 647 #else
 648       "\t- MySQL support\n"
 649 #endif
 650 #ifdef HAVE_PGSQL
 651       "\t+ PgSQL support\n"
 652 #else
 653       "\t- PgSQL support\n"
 654 #endif
 655 #ifdef HAVE_DBI
 656       "\t+ DBI support\n"
 657 #else
 658       "\t- DBI support\n"
 659 #endif
 660 #ifdef HAVE_KRB5
 661       "\t+ Kerberos support\n"
 662 #else
 663       "\t- Kerberos support\n"
 664 #endif
 665 #if defined(HAVE_LDAP_H) && defined(HAVE_LBER_H) && defined(HAVE_LIBLDAP) && defined(HAVE_LIBLBER)
 666       "\t+ LDAP support\n"
 667 #else
 668       "\t- LDAP support\n"
 669 #endif
 670 #ifdef USE_MEMCACHED
 671       "\t+ memcached support\n"
 672 #else
 673       "\t- memcached support\n"
 674 #endif
 675 #ifdef HAVE_FAM_H
 676       "\t+ FAM support\n"
 677 #else
 678       "\t- FAM support\n"
 679 #endif
 680 #ifdef HAVE_LUA_H
 681       "\t+ LUA support\n"
 682 #else
 683       "\t- LUA support\n"
 684 #endif
 685 #ifdef HAVE_LIBXML_H
 686       "\t+ xml support\n"
 687 #else
 688       "\t- xml support\n"
 689 #endif
 690 #ifdef HAVE_SQLITE3_H
 691       "\t+ SQLite support\n"
 692 #else
 693       "\t- SQLite support\n"
 694 #endif
 695 #ifdef HAVE_GDBM_H
 696       "\t+ GDBM support\n"
 697 #else
 698       "\t- GDBM support\n"
 699 #endif
 700       "\n";
 701   show_version();
 702   printf("\nEvent Handlers:\n\n%s", features);
 703 }
 704
 705 static void show_help (void) {
 706         char *b = PACKAGE_DESC TEXT_SSL " ("__DATE__ " " __TIME__ ")" \
 707 " - a light and fast webserver\n" \
 708 "usage:\n" \
 709 " -f <name>  filename of the config-file\n" \
 710 " -m <name>  module directory (default: "LIBRARY_DIR")\n" \
 711 " -i <secs>  graceful shutdown after <secs> of inactivity\n" \
 712 " -1         process single (one) request on stdin socket, then exit\n" \
 713 " -p         print the parsed config-file in internal form, and exit\n" \
 714 " -t         test config-file syntax, then exit\n" \
 715 " -tt        test config-file syntax, load and init modules, then exit\n" \
 716 " -D         don't go to background (default: go to background)\n" \
 717 " -v         show version\n" \
 718 " -V         show compile-time features\n" \
 719 " -h         show this help\n" \
 720 "\n"
 721 ;
 722         write_all(STDOUT_FILENO, b, strlen(b));
 723 }
 724
 725 /**
 726  * open the errorlog
 727  *
 728  * we have 4 possibilities:
 729  * - stderr (default)
 730  * - syslog
 731  * - logfile
 732  * - pipe
 733  *
 734  */
 735
 736 static int log_error_open(server *srv) {
 737     int errfd;
 738   #ifdef HAVE_SYSLOG_H
 739     /* perhaps someone wants to use syslog() */
 740     int facility = -1;
 741     if (!buffer_string_is_empty(srv->srvconf.syslog_facility)) {
 742         static const struct facility_name_st {
 743           const char *name;
 744           int val;
 745         } facility_names[] = {
 746             { "auth",     LOG_AUTH }
 747           #ifdef LOG_AUTHPRIV
 748            ,{ "authpriv", LOG_AUTHPRIV }
 749           #endif
 750           #ifdef LOG_CRON
 751            ,{ "cron",     LOG_CRON }
 752           #endif
 753            ,{ "daemon",   LOG_DAEMON }
 754           #ifdef LOG_FTP
 755            ,{ "ftp",      LOG_FTP }
 756           #endif
 757           #ifdef LOG_KERN
 758            ,{ "kern",     LOG_KERN }
 759           #endif
 760           #ifdef LOG_LPR
 761            ,{ "lpr",      LOG_LPR }
 762           #endif
 763           #ifdef LOG_MAIL
 764            ,{ "mail",     LOG_MAIL }
 765           #endif
 766           #ifdef LOG_NEWS
 767            ,{ "news",     LOG_NEWS }
 768           #endif
 769            ,{ "security", LOG_AUTH }           /* DEPRECATED */
 770           #ifdef LOG_SYSLOG
 771            ,{ "syslog",   LOG_SYSLOG }
 772           #endif
 773           #ifdef LOG_USER
 774            ,{ "user",     LOG_USER }
 775           #endif
 776           #ifdef LOG_UUCP
 777            ,{ "uucp",     LOG_UUCP }
 778           #endif
 779            ,{ "local0",   LOG_LOCAL0 }
 780            ,{ "local1",   LOG_LOCAL1 }
 781            ,{ "local2",   LOG_LOCAL2 }
 782            ,{ "local3",   LOG_LOCAL3 }
 783            ,{ "local4",   LOG_LOCAL4 }
 784            ,{ "local5",   LOG_LOCAL5 }
 785            ,{ "local6",   LOG_LOCAL6 }
 786            ,{ "local7",   LOG_LOCAL7 }
 787         };
 788         unsigned int i;
 789         for (i = 0; i < sizeof(facility_names)/sizeof(facility_names[0]); ++i) {
 790             const struct facility_name_st *f = facility_names+i;
 791             if (0 == strcmp(srv->srvconf.syslog_facility->ptr, f->name)) {
 792                 facility = f->val;
 793                 break;
 794             }
 795         }
 796         if (-1 == facility) {
 797             log_error_write(srv, __FILE__, __LINE__, "SBS",
 798                             "unrecognized server.syslog-facility: \"",
 799                             srv->srvconf.syslog_facility,
 800                             "\"; defaulting to \"daemon\" facility");
 801         }
 802     }
 803     openlog("lighttpd", LOG_CONS|LOG_PID, -1==facility ? LOG_DAEMON : facility);
 804   #endif
 805
 806     srv->errorlog_mode = ERRORLOG_FD;
 807     srv->errorlog_fd = STDERR_FILENO;
 808
 809     if (srv->srvconf.errorlog_use_syslog) {
 810         srv->errorlog_mode = ERRORLOG_SYSLOG;
 811     }
 812     else if (!buffer_string_is_empty(srv->srvconf.errorlog_file)) {
 813         const char *logfile = srv->srvconf.errorlog_file->ptr;
 814
 815         if (-1 == (srv->errorlog_fd = fdevent_open_logger(logfile))) {
 816             log_error_write(srv, __FILE__, __LINE__, "SSSS",
 817                             "opening errorlog '", logfile,
 818                             "' failed: ", strerror(errno));
 819             return -1;
 820         }
 821         srv->errorlog_mode = logfile[0] == '|' ? ERRORLOG_PIPE : ERRORLOG_FILE;
 822     }
 823
 824     if (srv->errorlog_mode == ERRORLOG_FD && !srv->srvconf.dont_daemonize) {
 825         /* We can only log to stderr in dont-daemonize mode;
 826          * if we do daemonize and no errorlog file is specified,
 827          * we log into /dev/null
 828          */
 829         srv->errorlog_fd = -1;
 830     }
 831
 832     if (!buffer_string_is_empty(srv->srvconf.breakagelog_file)) {
 833         const char *logfile = srv->srvconf.breakagelog_file->ptr;
 834
 835         if (srv->errorlog_mode == ERRORLOG_FD) {
 836             srv->errorlog_fd = dup(STDERR_FILENO);
 837             fdevent_setfd_cloexec(srv->errorlog_fd);
 838         }
 839
 840         if (-1 == (errfd = fdevent_open_logger(logfile))) {
 841             log_error_write(srv, __FILE__, __LINE__, "SSSS",
 842                             "opening errorlog '", logfile,
 843                             "' failed: ", strerror(errno));
 844             return -1;
 845         }
 846     }
 847     else if (!srv->srvconf.dont_daemonize) {
 848         /* move STDERR_FILENO to /dev/null */
 849         if (-1 == (errfd = fdevent_open_devnull())) {
 850             log_error_write(srv, __FILE__, __LINE__, "ss",
 851                             "opening /dev/null failed:", strerror(errno));
 852             return -1;
 853         }
 854     }
 855     else {
 856         /*(leave STDERR_FILENO as-is)*/
 857         errfd = -1;
 858     }
 859
 860     if (0 != fdevent_set_stdin_stdout_stderr(-1, -1, errfd)) {
 861         log_error_write(srv, __FILE__, __LINE__, "ss",
 862                         "setting stderr failed:", strerror(errno));
 863       #ifdef FD_CLOEXEC
 864         if (-1 != errfd) close(errfd);
 865       #endif
 866         return -1;
 867     }
 868   #ifdef FD_CLOEXEC
 869     if (-1 != errfd) close(errfd);
 870   #endif
 871
 872     return 0;
 873 }
 874
 875 /**
 876  * cycle the errorlog
 877  *
 878  */
 879
 880 static int log_error_cycle(server *srv) {
 881     /* cycle only if the error log is a file */
 882
 883     if (srv->errorlog_mode == ERRORLOG_FILE) {
 884         const char *logfile = srv->srvconf.errorlog_file->ptr;
 885         int new_fd;
 886
 887         if (-1 == (new_fd = fdevent_open_logger(logfile))) {
 888             /* write to old log */
 889             log_error_write(srv, __FILE__, __LINE__, "SSSSS",
 890                             "cycling errorlog '", logfile,
 891                             "' failed: ", strerror(errno),
 892                             ", falling back to syslog()");
 893
 894             close(srv->errorlog_fd);
 895             srv->errorlog_fd = -1;
 896           #ifdef HAVE_SYSLOG_H
 897             srv->errorlog_mode = ERRORLOG_SYSLOG;
 898           #endif
 899         }
 900         else {
 901             /* ok, new log is open, close the old one */
 902             close(srv->errorlog_fd);
 903             srv->errorlog_fd = new_fd;
 904             fdevent_setfd_cloexec(srv->errorlog_fd);
 905         }
 906     }
 907
 908     return 0;
 909 }
 910
 911 static int log_error_close(server *srv) {
 912     switch(srv->errorlog_mode) {
 913     case ERRORLOG_PIPE:
 914     case ERRORLOG_FILE:
 915     case ERRORLOG_FD:
 916         if (-1 != srv->errorlog_fd) {
 917             /* don't close STDERR */
 918             if (STDERR_FILENO != srv->errorlog_fd)
 919                 close(srv->errorlog_fd);
 920             srv->errorlog_fd = -1;
 921         }
 922         break;
 923     case ERRORLOG_SYSLOG:
 924       #ifdef HAVE_SYSLOG_H
 925         closelog();
 926       #endif
 927         break;
 928     }
 929
 930     return 0;
 931 }
 932
 933 static void server_sockets_save (server *srv) {    /* graceful_restart */
 934     memcpy(&graceful_sockets, &srv->srv_sockets, sizeof(server_socket_array));
 935     memset(&srv->srv_sockets, 0, sizeof(server_socket_array));
 936 }
 937
 938 static void server_sockets_restore (server *srv) { /* graceful_restart */
 939     memcpy(&srv->srv_sockets, &graceful_sockets, sizeof(server_socket_array));
 940     memset(&graceful_sockets, 0, sizeof(server_socket_array));
 941 }
 942
 943 static int server_sockets_set_nb_cloexec (server *srv) {
 944     if (srv->sockets_disabled) return 0; /* lighttpd -1 (one-shot mode) */
 945     for (size_t i = 0; i < srv->srv_sockets.used; ++i) {
 946         server_socket *srv_socket = srv->srv_sockets.ptr[i];
 947         if (-1 == fdevent_fcntl_set_nb_cloexec_sock(srv->ev, srv_socket->fd)) {
 948             log_error_write(srv, __FILE__, __LINE__, "ss",
 949                             "fcntl failed:", strerror(errno));
 950             return -1;
 951         }
 952     }
 953     return 0;
 954 }
 955
 956 static void server_sockets_set_event (server *srv, int event) {
 957     for (size_t i = 0; i < srv->srv_sockets.used; ++i) {
 958         server_socket *srv_socket = srv->srv_sockets.ptr[i];
 959         fdevent_event_set(srv->ev,&(srv_socket->fde_ndx),srv_socket->fd,event);
 960     }
 961 }
 962
 963 static void server_sockets_unregister (server *srv) {
 964     for (size_t i = 0; i < srv->srv_sockets.used; ++i)
 965         network_unregister_sock(srv, srv->srv_sockets.ptr[i]);
 966 }
 967
 968 static void server_sockets_close (server *srv) {
 969     /* closing socket right away will make it possible for the next lighttpd
 970      * to take over (old-style graceful restart), but only if backends
 971      * (e.g. fastcgi, scgi, etc) are independent from lighttpd, rather
 972      * than started by lighttpd via "bin-path")
 973      */
 974     for (size_t i = 0; i < srv->srv_sockets.used; ++i) {
 975         server_socket *srv_socket = srv->srv_sockets.ptr[i];
 976         if (-1 == srv_socket->fd) continue;
 977         network_unregister_sock(srv, srv_socket);
 978         close(srv_socket->fd);
 979         srv_socket->fd = -1;
 980         /* network_close() will cleanup after us */
 981     }
 982 }
 983
 984 static void server_graceful_shutdown_maint (server *srv) {
 985     connections *conns = srv->conns;
 986     for (size_t ndx = 0; ndx < conns->used; ++ndx) {
 987         connection * const con = conns->ptr[ndx];
 988         int changed = 0;
 989
 990         if (con->state == CON_STATE_CLOSE) {
 991             /* reduce remaining linger timeout to be
 992              * (from zero) *up to* one more second, but no more */
 993             if (HTTP_LINGER_TIMEOUT > 1)
 994                 con->close_timeout_ts -= (HTTP_LINGER_TIMEOUT - 1);
 995             if (srv->cur_ts - con->close_timeout_ts > HTTP_LINGER_TIMEOUT)
 996                 changed = 1;
 997         }
 998         else if (con->state == CON_STATE_READ && con->request_count > 1
 999                  && chunkqueue_is_empty(con->read_queue)) {
1000             /* close connections in keep-alive waiting for next request */
1001             connection_set_state(srv, con, CON_STATE_ERROR);
1002             changed = 1;
1003         }
1004
1005         con->keep_alive = 0;                    /* disable keep-alive */
1006
1007         con->conf.kbytes_per_second = 0;        /* disable rate limit */
1008         con->conf.global_kbytes_per_second = 0; /* disable rate limit */
1009         if (con->traffic_limit_reached) {
1010             con->traffic_limit_reached = 0;
1011             changed = 1;
1012         }
1013
1014         if (changed) {
1015             connection_state_machine(srv, con);
1016         }
1017     }
1018 }
1019
1020 static void server_graceful_state (server *srv) {
1021
1022     if (!srv_shutdown) server_graceful_shutdown_maint(srv);
1023
1024     if (!oneshot_fd) {
1025         if (0==srv->srv_sockets.used || -1 == srv->srv_sockets.ptr[0]->fde_ndx)
1026             return;
1027     }
1028
1029     log_error_write(srv, __FILE__, __LINE__, "s",
1030                     "[note] graceful shutdown started");
1031
1032     /* no graceful restart if chroot()ed, if oneshot mode, or if idle timeout */
1033     if (!buffer_string_is_empty(srv->srvconf.changeroot)
1034         || oneshot_fd || 2 == graceful_shutdown)
1035         graceful_restart = 0;
1036
1037     if (graceful_restart) {
1038         server_sockets_unregister(srv);
1039         if (pid_fd > 0) pid_fd = -pid_fd; /*(flag to skip removing pid file)*/
1040     }
1041     else {
1042         server_sockets_close(srv);
1043         remove_pid_file(srv);
1044         buffer_reset(srv->srvconf.pid_file); /*(prevent more removal attempts)*/
1045     }
1046 }
1047
1048 static int server_main (server * const srv, int argc, char **argv) {
1049         int print_config = 0;
1050         int test_config = 0;
1051         int i_am_root = 0;
1052         int o;
1053 #ifdef HAVE_FORK
1054         int num_childs = 0;
1055 #endif
1056         size_t i;
1057         time_t idle_limit = 0, last_active_ts = time(NULL);
1058 #ifdef HAVE_SIGACTION
1059         struct sigaction act;
1060 #endif
1061
1062 #ifdef HAVE_FORK
1063         int parent_pipe_fd = -1;
1064 #endif
1065
1066 #ifdef HAVE_GETUID
1067         i_am_root = (0 == getuid());
1068 #endif
1069
1070         /* initialize globals (including file-scoped static globals) */
1071         oneshot_fd = 0;
1072         srv_shutdown = 0;
1073         graceful_shutdown = 0;
1074         handle_sig_alarm = 1;
1075         handle_sig_hup = 0;
1076         forwarded_sig_hup = 0;
1077         chunkqueue_set_tempdirs_default_reset();
1078         http_auth_dumbdata_reset();
1079         http_vhostdb_dumbdata_reset();
1080         /*graceful_restart = 0;*//*(reset below to avoid further daemonizing)*/
1081         /*(intentionally preserved)*/
1082         /*memset(graceful_sockets, 0, sizeof(graceful_sockets));*/
1083         /*pid_fd = -1;*/
1084
1085         srv->srvconf.port = 0;
1086         srv->srvconf.dont_daemonize = 0;
1087         srv->srvconf.preflight_check = 0;
1088
1089         while(-1 != (o = getopt(argc, argv, "f:m:i:hvVD1pt"))) {
1090                 switch(o) {
1091                 case 'f':
1092                         if (srv->config_storage) {
1093                                 log_error_write(srv, __FILE__, __LINE__, "s",
1094                                                 "Can only read one config file. Use the include command to use multiple config files.");
1095                                 return -1;
1096                         }
1097                         if (config_read(srv, optarg)) {
1098                                 return -1;
1099                         }
1100                         break;
1101                 case 'm':
1102                         buffer_copy_string(srv->srvconf.modules_dir, optarg);
1103                         break;
1104                 case 'i': {
1105                         char *endptr;
1106                         long timeout = strtol(optarg, &endptr, 0);
1107                         if (!*optarg || *endptr || timeout < 0) {
1108                                 log_error_write(srv, __FILE__, __LINE__, "ss",
1109                                                 "Invalid idle timeout value:", optarg);
1110                                 return -1;
1111                         }
1112                         idle_limit = (time_t)timeout;
1113                         break;
1114                 }
1115                 case 'p': print_config = 1; break;
1116                 case 't': ++test_config; break;
1117                 case '1': if (0 == oneshot_fd) oneshot_fd = dup(STDIN_FILENO);
1118                           break;
1119                 case 'D': srv->srvconf.dont_daemonize = 1; break;
1120                 case 'v': show_version(); return 0;
1121                 case 'V': show_features(); return 0;
1122                 case 'h': show_help(); return 0;
1123                 default:
1124                         show_help();
1125                         return -1;
1126                 }
1127         }
1128
1129         if (!srv->config_storage) {
1130                 log_error_write(srv, __FILE__, __LINE__, "s",
1131                                 "No configuration available. Try using -f option.");
1132                 return -1;
1133         }
1134
1135         if (print_config) {
1136                 data_unset *dc = srv->config_context->data[0];
1137                 if (dc) {
1138                         dc->print(dc, 0);
1139                         fprintf(stdout, "\n");
1140                 } else {
1141                         /* shouldn't happend */
1142                         fprintf(stderr, "global config not found\n");
1143                 }
1144         }
1145
1146         if (test_config) {
1147                 if (1 == test_config) {
1148                         printf("Syntax OK\n");
1149                 } else { /*(test_config > 1)*/
1150                         test_config = 0;
1151                         srv->srvconf.preflight_check = 1;
1152                         srv->srvconf.dont_daemonize = 1;
1153                         buffer_reset(srv->srvconf.pid_file);
1154                 }
1155         }
1156
1157         if (test_config || print_config) {
1158                 return 0;
1159         }
1160
1161         if (oneshot_fd) {
1162                 if (oneshot_fd <= STDERR_FILENO) {
1163                         log_error_write(srv, __FILE__, __LINE__, "s",
1164                                         "Invalid fds at startup with lighttpd -1");
1165                         return -1;
1166                 }
1167                 graceful_shutdown = 1;
1168                 srv->sockets_disabled = 1;
1169                 srv->srvconf.dont_daemonize = 1;
1170                 buffer_reset(srv->srvconf.pid_file);
1171                 if (srv->srvconf.max_worker) {
1172                         srv->srvconf.max_worker = 0;
1173                         log_error_write(srv, __FILE__, __LINE__, "s",
1174                                         "server one-shot command line option disables server.max-worker config file option.");
1175                 }
1176         }
1177
1178         /* close stdin and stdout, as they are not needed */
1179         {
1180                 struct stat st;
1181                 int devnull;
1182                 int errfd;
1183                 do {
1184                         devnull = fdevent_open_devnull();
1185                 } while (-1 != devnull && devnull <= STDERR_FILENO);
1186                 if (-1 == devnull) {
1187                         log_error_write(srv, __FILE__, __LINE__, "ss",
1188                                         "opening /dev/null failed:", strerror(errno));
1189                         return -1;
1190                 }
1191                 errfd = (0 == fstat(STDERR_FILENO, &st)) ? -1 : devnull;
1192                 if (0 != fdevent_set_stdin_stdout_stderr(devnull, devnull, errfd)) {
1193                         log_error_write(srv, __FILE__, __LINE__, "ss",
1194                                         "setting default fds failed:", strerror(errno));
1195                       #ifdef FD_CLOEXEC
1196                         if (-1 != errfd) close(errfd);
1197                         if (devnull != errfd) close(devnull);
1198                       #endif
1199                         return -1;
1200                 }
1201               #ifdef FD_CLOEXEC
1202                 if (-1 != errfd) close(errfd);
1203                 if (devnull != errfd) close(devnull);
1204               #endif
1205         }
1206
1207         if (0 != config_set_defaults(srv)) {
1208                 log_error_write(srv, __FILE__, __LINE__, "s",
1209                                 "setting default values failed");
1210                 return -1;
1211         }
1212
1213         /* check document-root */
1214         if (buffer_string_is_empty(srv->config_storage[0]->document_root)) {
1215                 log_error_write(srv, __FILE__, __LINE__, "s",
1216                                 "document-root is not set\n");
1217                 return -1;
1218         }
1219
1220         if (plugins_load(srv)) {
1221                 log_error_write(srv, __FILE__, __LINE__, "s",
1222                                 "loading plugins finally failed");
1223                 return -1;
1224         }
1225
1226         if (HANDLER_GO_ON != plugins_call_init(srv)) {
1227                 log_error_write(srv, __FILE__, __LINE__, "s", "Initialization of plugins failed. Going down.");
1228                 return -1;
1229         }
1230
1231         /* open pid file BEFORE chroot */
1232         if (-1 == pid_fd && !buffer_string_is_empty(srv->srvconf.pid_file)) {
1233                 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))) {
1234                         struct stat st;
1235                         if (errno != EEXIST) {
1236                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
1237                                         "opening pid-file failed:", srv->srvconf.pid_file, strerror(errno));
1238                                 return -1;
1239                         }
1240
1241                         if (0 != stat(srv->srvconf.pid_file->ptr, &st)) {
1242                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
1243                                                 "stating existing pid-file failed:", srv->srvconf.pid_file, strerror(errno));
1244                         }
1245
1246                         if (!S_ISREG(st.st_mode)) {
1247                                 log_error_write(srv, __FILE__, __LINE__, "sb",
1248                                                 "pid-file exists and isn't regular file:", srv->srvconf.pid_file);
1249                                 return -1;
1250                         }
1251
1252                         if (-1 == (pid_fd = open(srv->srvconf.pid_file->ptr, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH))) {
1253                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
1254                                                 "opening pid-file failed:", srv->srvconf.pid_file, strerror(errno));
1255                                 return -1;
1256                         }
1257                 }
1258         }
1259
1260         if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
1261                 /* select limits itself
1262                  *
1263                  * as it is a hard limit and will lead to a segfault we add some safety
1264                  * */
1265                 srv->max_fds = FD_SETSIZE - 200;
1266         } else {
1267                 srv->max_fds = 4096;
1268         }
1269
1270         {
1271 #ifdef HAVE_GETRLIMIT
1272                 struct rlimit rlim;
1273                 int use_rlimit = 1;
1274 #ifdef HAVE_VALGRIND_VALGRIND_H
1275                 if (RUNNING_ON_VALGRIND) use_rlimit = 0;
1276 #endif
1277
1278                 if (0 != getrlimit(RLIMIT_NOFILE, &rlim)) {
1279                         log_error_write(srv, __FILE__, __LINE__,
1280                                         "ss", "couldn't get 'max filedescriptors'",
1281                                         strerror(errno));
1282                         return -1;
1283                 }
1284
1285                 /**
1286                  * if we are not root can can't increase the fd-limit above rlim_max, but we can reduce it
1287                  */
1288                 if (use_rlimit && srv->srvconf.max_fds
1289                     && (i_am_root || srv->srvconf.max_fds <= rlim.rlim_max)) {
1290                         /* set rlimits */
1291
1292                         rlim.rlim_cur = srv->srvconf.max_fds;
1293                         if (i_am_root) rlim.rlim_max = srv->srvconf.max_fds;
1294
1295                         if (0 != setrlimit(RLIMIT_NOFILE, &rlim)) {
1296                                 log_error_write(srv, __FILE__, __LINE__,
1297                                                 "ss", "couldn't set 'max filedescriptors'",
1298                                                 strerror(errno));
1299                                 return -1;
1300                         }
1301                 }
1302
1303                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
1304                         srv->max_fds = rlim.rlim_cur < (rlim_t)FD_SETSIZE - 200 ? (int)rlim.rlim_cur : (int)FD_SETSIZE - 200;
1305                 } else {
1306                         srv->max_fds = rlim.rlim_cur;
1307                         /*(default upper limit of 4k if server.max-fds not specified)*/
1308                         if (i_am_root && 0 == srv->srvconf.max_fds && rlim.rlim_cur > 4096)
1309                                 srv->max_fds = 4096;
1310                 }
1311
1312                 /* set core file rlimit, if enable_cores is set */
1313                 if (use_rlimit && srv->srvconf.enable_cores && getrlimit(RLIMIT_CORE, &rlim) == 0) {
1314                         rlim.rlim_cur = rlim.rlim_max;
1315                         setrlimit(RLIMIT_CORE, &rlim);
1316                 }
1317 #endif
1318                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
1319                         /* don't raise the limit above FD_SET_SIZE */
1320                         if (srv->max_fds > ((int)FD_SETSIZE) - 200) {
1321                                 log_error_write(srv, __FILE__, __LINE__, "sd",
1322                                                 "can't raise max filedescriptors above",  FD_SETSIZE - 200,
1323                                                 "if event-handler is 'select'. Use 'poll' or something else or reduce server.max-fds.");
1324                                 return -1;
1325                         }
1326                 }
1327         }
1328
1329         /* we need root-perms for port < 1024 */
1330         if (0 != network_init(srv)) {
1331                 return -1;
1332         }
1333
1334         if (i_am_root) {
1335 #ifdef HAVE_PWD_H
1336                 /* set user and group */
1337                 struct group *grp = NULL;
1338                 struct passwd *pwd = NULL;
1339
1340                 if (!buffer_string_is_empty(srv->srvconf.groupname)) {
1341                         if (NULL == (grp = getgrnam(srv->srvconf.groupname->ptr))) {
1342                                 log_error_write(srv, __FILE__, __LINE__, "sb",
1343                                         "can't find groupname", srv->srvconf.groupname);
1344                                 return -1;
1345                         }
1346                 }
1347
1348                 if (!buffer_string_is_empty(srv->srvconf.username)) {
1349                         if (NULL == (pwd = getpwnam(srv->srvconf.username->ptr))) {
1350                                 log_error_write(srv, __FILE__, __LINE__, "sb",
1351                                                 "can't find username", srv->srvconf.username);
1352                                 return -1;
1353                         }
1354
1355                         if (pwd->pw_uid == 0) {
1356                                 log_error_write(srv, __FILE__, __LINE__, "s",
1357                                                 "I will not set uid to 0\n");
1358                                 return -1;
1359                         }
1360
1361                         if (NULL == grp && NULL == (grp = getgrgid(pwd->pw_gid))) {
1362                                 log_error_write(srv, __FILE__, __LINE__, "sd",
1363                                         "can't find group id", pwd->pw_gid);
1364                                 return -1;
1365                         }
1366                 }
1367
1368                 if (NULL != grp) {
1369                         if (grp->gr_gid == 0) {
1370                                 log_error_write(srv, __FILE__, __LINE__, "s",
1371                                                 "I will not set gid to 0\n");
1372                                 return -1;
1373                         }
1374                 }
1375
1376                 /*
1377                  * Change group before chroot, when we have access
1378                  * to /etc/group
1379                  * */
1380                 if (NULL != grp) {
1381                         if (-1 == setgid(grp->gr_gid)) {
1382                                 log_error_write(srv, __FILE__, __LINE__, "ss", "setgid failed: ", strerror(errno));
1383                                 return -1;
1384                         }
1385                         if (-1 == setgroups(0, NULL)) {
1386                                 log_error_write(srv, __FILE__, __LINE__, "ss", "setgroups failed: ", strerror(errno));
1387                                 return -1;
1388                         }
1389                         if (!buffer_string_is_empty(srv->srvconf.username)) {
1390                                 initgroups(srv->srvconf.username->ptr, grp->gr_gid);
1391                         }
1392                 }
1393 #endif
1394 #ifdef HAVE_CHROOT
1395                 if (!buffer_string_is_empty(srv->srvconf.changeroot)) {
1396                         tzset();
1397
1398                         if (-1 == chroot(srv->srvconf.changeroot->ptr)) {
1399                                 log_error_write(srv, __FILE__, __LINE__, "ss", "chroot failed: ", strerror(errno));
1400                                 return -1;
1401                         }
1402                         if (-1 == chdir("/")) {
1403                                 log_error_write(srv, __FILE__, __LINE__, "ss", "chdir failed: ", strerror(errno));
1404                                 return -1;
1405                         }
1406                 }
1407 #endif
1408 #ifdef HAVE_PWD_H
1409                 /* drop root privs */
1410                 if (NULL != pwd) {
1411                         if (-1 == setuid(pwd->pw_uid)) {
1412                                 log_error_write(srv, __FILE__, __LINE__, "ss", "setuid failed: ", strerror(errno));
1413                                 return -1;
1414                         }
1415                 }
1416 #endif
1417 #if defined(HAVE_SYS_PRCTL_H) && defined(PR_SET_DUMPABLE)
1418                 /**
1419                  * on IRIX 6.5.30 they have prctl() but no DUMPABLE
1420                  */
1421                 if (srv->srvconf.enable_cores) {
1422                         prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
1423                 }
1424 #endif
1425         }
1426
1427         /* set max-conns */
1428         if (srv->srvconf.max_conns > srv->max_fds/2) {
1429                 /* we can't have more connections than max-fds/2 */
1430                 log_error_write(srv, __FILE__, __LINE__, "sdd", "can't have more connections than fds/2: ", srv->srvconf.max_conns, srv->max_fds);
1431                 srv->max_conns = srv->max_fds/2;
1432         } else if (srv->srvconf.max_conns) {
1433                 /* otherwise respect the wishes of the user */
1434                 srv->max_conns = srv->srvconf.max_conns;
1435         } else {
1436                 /* or use the default: we really don't want to hit max-fds */
1437                 srv->max_conns = srv->max_fds/3;
1438         }
1439
1440 #ifdef HAVE_FORK
1441         /* network is up, let's daemonize ourself */
1442         if (0 == srv->srvconf.dont_daemonize && 0 == graceful_restart) {
1443                 parent_pipe_fd = daemonize();
1444         }
1445 #endif
1446         graceful_restart = 0;/*(reset here after avoiding further daemonizing)*/
1447         graceful_shutdown= 0;
1448
1449
1450 #ifdef HAVE_SIGACTION
1451         memset(&act, 0, sizeof(act));
1452         act.sa_handler = SIG_IGN;
1453         sigaction(SIGPIPE, &act, NULL);
1454 # if defined(SA_SIGINFO)
1455         last_sighup_info.si_uid = 0,
1456         last_sighup_info.si_pid = 0;
1457         last_sigterm_info.si_uid = 0,
1458         last_sigterm_info.si_pid = 0;
1459         act.sa_sigaction = sigaction_handler;
1460         sigemptyset(&act.sa_mask);
1461         act.sa_flags = SA_SIGINFO;
1462 # else
1463         act.sa_handler = signal_handler;
1464         sigemptyset(&act.sa_mask);
1465         act.sa_flags = 0;
1466 # endif
1467         sigaction(SIGINT,  &act, NULL);
1468         sigaction(SIGTERM, &act, NULL);
1469         sigaction(SIGHUP,  &act, NULL);
1470         sigaction(SIGALRM, &act, NULL);
1471         sigaction(SIGUSR1, &act, NULL);
1472
1473         /* it should be safe to restart syscalls after SIGCHLD */
1474         act.sa_flags |= SA_RESTART | SA_NOCLDSTOP;
1475         sigaction(SIGCHLD, &act, NULL);
1476
1477 #elif defined(HAVE_SIGNAL)
1478         /* ignore the SIGPIPE from sendfile() */
1479         signal(SIGPIPE, SIG_IGN);
1480         signal(SIGALRM, signal_handler);
1481         signal(SIGTERM, signal_handler);
1482         signal(SIGHUP,  signal_handler);
1483         signal(SIGCHLD,  signal_handler);
1484         signal(SIGINT,  signal_handler);
1485         signal(SIGUSR1, signal_handler);
1486 #endif
1487
1488
1489         srv->gid = getgid();
1490         srv->uid = getuid();
1491
1492         /* write pid file */
1493         if (pid_fd > 2) {
1494                 buffer_copy_int(srv->tmp_buf, getpid());
1495                 buffer_append_string_len(srv->tmp_buf, CONST_STR_LEN("\n"));
1496                 if (-1 == write_all(pid_fd, CONST_BUF_LEN(srv->tmp_buf))) {
1497                         log_error_write(srv, __FILE__, __LINE__, "ss", "Couldn't write pid file:", strerror(errno));
1498                         close(pid_fd);
1499                         pid_fd = -1;
1500                         return -1;
1501                 }
1502         } else if (pid_fd < -2) {
1503                 pid_fd = -pid_fd;
1504         }
1505
1506         /* Close stderr ASAP in the child process to make sure that nothing
1507          * is being written to that fd which may not be valid anymore. */
1508         if (!srv->srvconf.preflight_check) {
1509                 if (-1 == log_error_open(srv)) {
1510                         log_error_write(srv, __FILE__, __LINE__, "s", "Opening errorlog failed. Going down.");
1511                         return -1;
1512                 }
1513                 log_error_write(srv, __FILE__, __LINE__, "s", "server started (" PACKAGE_DESC ")");
1514         }
1515
1516         if (buffer_is_empty(srv->config_storage[0]->server_tag)) {
1517                 buffer_copy_string_len(srv->config_storage[0]->server_tag, CONST_STR_LEN(PACKAGE_DESC));
1518         }
1519
1520         if (HANDLER_GO_ON != plugins_call_set_defaults(srv)) {
1521                 log_error_write(srv, __FILE__, __LINE__, "s", "Configuration of plugins failed. Going down.");
1522                 return -1;
1523         }
1524
1525         /* settings might be enabled during module config set defaults */
1526         srv->config_storage[0]->high_precision_timestamps = srv->srvconf.high_precision_timestamps;
1527
1528         /* dump unused config-keys */
1529         for (i = 0; i < srv->config_context->used; i++) {
1530                 array *config = ((data_config *)srv->config_context->data[i])->value;
1531                 size_t j;
1532
1533                 for (j = 0; config && j < config->used; j++) {
1534                         data_unset *du = config->data[j];
1535
1536                         /* all var.* is known as user defined variable */
1537                         if (strncmp(du->key->ptr, "var.", sizeof("var.") - 1) == 0) {
1538                                 continue;
1539                         }
1540
1541                         if (NULL == array_get_element_klen(srv->config_touched, CONST_BUF_LEN(du->key))) {
1542                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
1543                                                 "WARNING: unknown config-key:",
1544                                                 du->key,
1545                                                 "(ignored)");
1546                         }
1547                 }
1548         }
1549
1550         if (srv->config_unsupported) {
1551                 log_error_write(srv, __FILE__, __LINE__, "s",
1552                                 "Configuration contains unsupported keys. Going down.");
1553         }
1554
1555         if (srv->config_deprecated) {
1556                 log_error_write(srv, __FILE__, __LINE__, "s",
1557                                 "Configuration contains deprecated keys. Going down.");
1558         }
1559
1560         if (srv->config_unsupported || srv->config_deprecated) {
1561                 return -1;
1562         }
1563
1564         if (srv->srvconf.preflight_check) {
1565                 /*printf("Preflight OK");*//*(stdout reopened to /dev/null)*/
1566                 return 0;
1567         }
1568
1569
1570 #ifdef HAVE_FORK
1571         /**
1572          * notify daemonize-grandparent of successful startup
1573          * do this before any further forking is done (workers)
1574          */
1575         if (0 == srv->srvconf.dont_daemonize && -1 != parent_pipe_fd) {
1576                 if (0 > write(parent_pipe_fd, "", 1)) return -1;
1577                 close(parent_pipe_fd);
1578         }
1579
1580         if (idle_limit && srv->srvconf.max_worker) {
1581                 srv->srvconf.max_worker = 0;
1582                 log_error_write(srv, __FILE__, __LINE__, "s",
1583                                 "server idle time limit command line option disables server.max-worker config file option.");
1584         }
1585
1586         /* start watcher and workers */
1587         num_childs = srv->srvconf.max_worker;
1588         if (num_childs > 0) {
1589                 int child = 0;
1590                 while (!child && !srv_shutdown && !graceful_shutdown) {
1591                         if (num_childs > 0) {
1592                                 switch (fork()) {
1593                                 case -1:
1594                                         return -1;
1595                                 case 0:
1596                                         child = 1;
1597                                         break;
1598                                 default:
1599                                         num_childs--;
1600                                         break;
1601                                 }
1602                         } else {
1603                                 int status;
1604
1605                                 if (-1 != wait(&status)) {
1606                                         /**
1607                                          * one of our workers went away
1608                                          */
1609                                         num_childs++;
1610                                 } else {
1611                                         switch (errno) {
1612                                         case EINTR:
1613                                                 /**
1614                                                  * if we receive a SIGHUP we have to close our logs ourself as we don't
1615                                                  * have the mainloop who can help us here
1616                                                  */
1617                                                 if (handle_sig_hup) {
1618                                                         handle_sig_hup = 0;
1619
1620                                                         log_error_cycle(srv);
1621
1622                                                         /**
1623                                                          * forward to all procs in the process-group
1624                                                          *
1625                                                          * we also send it ourself
1626                                                          */
1627                                                         if (!forwarded_sig_hup && 0 != srv->srvconf.max_worker) {
1628                                                                 forwarded_sig_hup = 1;
1629                                                                 kill(0, SIGHUP);
1630                                                         }
1631                                                 }
1632                                                 break;
1633                                         default:
1634                                                 break;
1635                                         }
1636                                 }
1637                         }
1638                 }
1639
1640                 /**
1641                  * for the parent this is the exit-point
1642                  */
1643                 if (!child) {
1644                         /**
1645                          * kill all children too
1646                          */
1647                         if (graceful_shutdown || graceful_restart) {
1648                                 /* flag to ignore one SIGINT if graceful_restart */
1649                                 if (graceful_restart) graceful_restart = 2;
1650                                 kill(0, SIGINT);
1651                                 server_graceful_state(srv);
1652                         } else if (srv_shutdown) {
1653                                 kill(0, SIGTERM);
1654                         }
1655
1656                         return 0;
1657                 }
1658
1659                 /* ignore SIGUSR1 in workers; only parent directs graceful restart */
1660               #ifdef HAVE_SIGACTION
1661                 {
1662                         struct sigaction actignore;
1663                         memset(&actignore, 0, sizeof(actignore));
1664                         actignore.sa_handler = SIG_IGN;
1665                         sigaction(SIGUSR1, &actignore, NULL);
1666                 }
1667               #elif defined(HAVE_SIGNAL)
1668                         signal(SIGUSR1, SIG_IGN);
1669               #endif
1670
1671                 /**
1672                  * make sure workers do not muck with pid-file
1673                  */
1674                 if (0 <= pid_fd) {
1675                         close(pid_fd);
1676                         pid_fd = -1;
1677                 }
1678                 buffer_reset(srv->srvconf.pid_file);
1679
1680                 li_rand_reseed();
1681         }
1682 #endif
1683
1684         if (NULL == (srv->ev = fdevent_init(srv, srv->max_fds + 1, srv->event_handler))) {
1685                 log_error_write(srv, __FILE__, __LINE__,
1686                                 "s", "fdevent_init failed");
1687                 return -1;
1688         }
1689
1690         /* libev backend overwrites our SIGCHLD handler and calls waitpid on SIGCHLD; we want our own SIGCHLD handling. */
1691 #ifdef HAVE_SIGACTION
1692         sigaction(SIGCHLD, &act, NULL);
1693 #elif defined(HAVE_SIGNAL)
1694         signal(SIGCHLD,  signal_handler);
1695 #endif
1696
1697         /*
1698          * kqueue() is called here, select resets its internals,
1699          * all server sockets get their handlers
1700          *
1701          * */
1702         if (0 != network_register_fdevents(srv)) {
1703                 return -1;
1704         }
1705
1706         /* might fail if user is using fam (not gamin) and famd isn't running */
1707         if (NULL == (srv->stat_cache = stat_cache_init(srv))) {
1708                 log_error_write(srv, __FILE__, __LINE__, "s",
1709                         "stat-cache could not be setup, dieing.");
1710                 return -1;
1711         }
1712
1713 #ifdef USE_ALARM
1714         {
1715                 /* setup periodic timer (1 second) */
1716                 struct itimerval interval;
1717                 interval.it_interval.tv_sec = 1;
1718                 interval.it_interval.tv_usec = 0;
1719                 interval.it_value.tv_sec = 1;
1720                 interval.it_value.tv_usec = 0;
1721                 if (setitimer(ITIMER_REAL, &interval, NULL)) {
1722                         log_error_write(srv, __FILE__, __LINE__, "s", "setting timer failed");
1723                         return -1;
1724                 }
1725         }
1726 #endif
1727
1728
1729         /* get the current number of FDs */
1730         {
1731                 int fd = fdevent_open_devnull();
1732                 if (fd >= 0) {
1733                         srv->cur_fds = fd;
1734                         close(fd);
1735                 }
1736         }
1737
1738         if (0 != server_sockets_set_nb_cloexec(srv)) {
1739                 return -1;
1740         }
1741
1742         if (oneshot_fd && server_oneshot_init(srv, oneshot_fd)) {
1743                 oneshot_fd = -1;
1744         }
1745
1746         /* main-loop */
1747         while (!srv_shutdown) {
1748                 int n;
1749                 size_t ndx;
1750                 time_t min_ts;
1751
1752                 if (handle_sig_hup) {
1753                         handler_t r;
1754
1755                         /* reset notification */
1756                         handle_sig_hup = 0;
1757
1758
1759                         /* cycle logfiles */
1760
1761                         switch(r = plugins_call_handle_sighup(srv)) {
1762                         case HANDLER_GO_ON:
1763                                 break;
1764                         default:
1765                                 log_error_write(srv, __FILE__, __LINE__, "sd", "sighup-handler return with an error", r);
1766                                 break;
1767                         }
1768
1769                         if (-1 == log_error_cycle(srv)) {
1770                                 log_error_write(srv, __FILE__, __LINE__, "s", "cycling errorlog failed, dying");
1771
1772                                 return -1;
1773                         } else {
1774 #ifdef HAVE_SIGACTION
1775                                 log_error_write(srv, __FILE__, __LINE__, "sdsd",
1776                                         "logfiles cycled UID =",
1777                                         last_sighup_info.si_uid,
1778                                         "PID =",
1779                                         last_sighup_info.si_pid);
1780 #else
1781                                 log_error_write(srv, __FILE__, __LINE__, "s",
1782                                         "logfiles cycled");
1783 #endif
1784                         }
1785                 }
1786
1787                 if (handle_sig_alarm) {
1788                         /* a new second */
1789
1790 #ifdef USE_ALARM
1791                         /* reset notification */
1792                         handle_sig_alarm = 0;
1793 #endif
1794
1795                         /* get current time */
1796                         min_ts = time(NULL);
1797
1798                         if (min_ts != srv->cur_ts) {
1799 #ifdef DEBUG_CONNECTION_STATES
1800                                 int cs = 0;
1801 #endif
1802                                 connections *conns = srv->conns;
1803                                 handler_t r;
1804
1805                                 switch(r = plugins_call_handle_trigger(srv)) {
1806                                 case HANDLER_GO_ON:
1807                                         break;
1808                                 case HANDLER_ERROR:
1809                                         log_error_write(srv, __FILE__, __LINE__, "s", "one of the triggers failed");
1810                                         break;
1811                                 default:
1812                                         log_error_write(srv, __FILE__, __LINE__, "d", r);
1813                                         break;
1814                                 }
1815
1816                                 /* trigger waitpid */
1817                                 srv->cur_ts = min_ts;
1818
1819                                 /* check idle time limit, if enabled */
1820                                 if (idle_limit && idle_limit < min_ts - last_active_ts && !graceful_shutdown) {
1821                                         log_error_write(srv, __FILE__, __LINE__, "sDs", "[note] idle timeout", (int)idle_limit,
1822                                                         "s exceeded, initiating graceful shutdown");
1823                                         graceful_shutdown = 2; /* value 2 indicates idle timeout */
1824                                         if (graceful_restart) {
1825                                                 graceful_restart = 0;
1826                                                 if (pid_fd < -2) pid_fd = -pid_fd;
1827                                                 server_sockets_close(srv);
1828                                         }
1829                                 }
1830
1831                               #ifdef HAVE_GETLOADAVG
1832                                 /* refresh loadavg data every 30 seconds */
1833                                 if (srv->srvconf.loadts + 30 < min_ts) {
1834                                         if (-1 != getloadavg(srv->srvconf.loadavg, 3)) {
1835                                                 srv->srvconf.loadts = min_ts;
1836                                         }
1837                                 }
1838                               #endif
1839
1840                                 /* cleanup stat-cache */
1841                                 stat_cache_trigger_cleanup(srv);
1842                                 /* reset global/aggregate rate limit counters */
1843                                 for (i = 0; i < srv->config_context->used; ++i) {
1844                                         srv->config_storage[i]->global_bytes_per_second_cnt = 0;
1845                                 }
1846                                 /* if graceful_shutdown, accelerate cleanup of recently completed request/responses */
1847                                 if (graceful_shutdown && !srv_shutdown) server_graceful_shutdown_maint(srv);
1848                                 /**
1849                                  * check all connections for timeouts
1850                                  *
1851                                  */
1852                                 for (ndx = 0; ndx < conns->used; ndx++) {
1853                                         connection * const con = conns->ptr[ndx];
1854                                         const int waitevents = fdevent_event_get_interest(srv->ev, con->fd);
1855                                         int changed = 0;
1856                                         int t_diff;
1857
1858                                         if (con->state == CON_STATE_CLOSE) {
1859                                                 if (srv->cur_ts - con->close_timeout_ts > HTTP_LINGER_TIMEOUT) {
1860                                                         changed = 1;
1861                                                 }
1862                                         } else if (waitevents & FDEVENT_IN) {
1863                                                 if (con->request_count == 1 || con->state != CON_STATE_READ) { /* e.g. CON_STATE_READ_POST || CON_STATE_WRITE */
1864                                                         if (srv->cur_ts - con->read_idle_ts > con->conf.max_read_idle) {
1865                                                                 /* time - out */
1866                                                                 if (con->conf.log_request_handling) {
1867                                                                         log_error_write(srv, __FILE__, __LINE__, "sd",
1868                                                                                 "connection closed - read timeout:", con->fd);
1869                                                                 }
1870
1871                                                                 connection_set_state(srv, con, CON_STATE_ERROR);
1872                                                                 changed = 1;
1873                                                         }
1874                                                 } else {
1875                                                         if (srv->cur_ts - con->read_idle_ts > con->keep_alive_idle) {
1876                                                                 /* time - out */
1877                                                                 if (con->conf.log_request_handling) {
1878                                                                         log_error_write(srv, __FILE__, __LINE__, "sd",
1879                                                                                 "connection closed - keep-alive timeout:", con->fd);
1880                                                                 }
1881
1882                                                                 connection_set_state(srv, con, CON_STATE_ERROR);
1883                                                                 changed = 1;
1884                                                         }
1885                                                 }
1886                                         }
1887
1888                                         /* max_write_idle timeout currently functions as backend timeout,
1889                                          * too, after response has been started.
1890                                          * future: have separate backend timeout, and then change this
1891                                          * to check for write interest before checking for timeout */
1892                                         /*if (waitevents & FDEVENT_OUT)*/
1893                                         if ((con->state == CON_STATE_WRITE) &&
1894                                             (con->write_request_ts != 0)) {
1895 #if 0
1896                                                 if (srv->cur_ts - con->write_request_ts > 60) {
1897                                                         log_error_write(srv, __FILE__, __LINE__, "sdd",
1898                                                                         "connection closed - pre-write-request-timeout:", con->fd, srv->cur_ts - con->write_request_ts);
1899                                                 }
1900 #endif
1901
1902                                                 if (srv->cur_ts - con->write_request_ts > con->conf.max_write_idle) {
1903                                                         /* time - out */
1904                                                         if (con->conf.log_timeouts) {
1905                                                                 log_error_write(srv, __FILE__, __LINE__, "sbsbsosds",
1906                                                                         "NOTE: a request from",
1907                                                                         con->dst_addr_buf,
1908                                                                         "for",
1909                                                                         con->request.uri,
1910                                                                         "timed out after writing",
1911                                                                         con->bytes_written,
1912                                                                         "bytes. We waited",
1913                                                                         (int)con->conf.max_write_idle,
1914                                                                         "seconds. If this a problem increase server.max-write-idle");
1915                                                         }
1916                                                         connection_set_state(srv, con, CON_STATE_ERROR);
1917                                                         changed = 1;
1918                                                 }
1919                                         }
1920
1921                                         /* we don't like div by zero */
1922                                         if (0 == (t_diff = srv->cur_ts - con->connection_start)) t_diff = 1;
1923
1924                                         if (con->traffic_limit_reached &&
1925                                             (con->conf.kbytes_per_second == 0 ||
1926                                              ((con->bytes_written / t_diff) < con->conf.kbytes_per_second * 1024))) {
1927                                                 /* enable connection again */
1928                                                 con->traffic_limit_reached = 0;
1929
1930                                                 changed = 1;
1931                                         }
1932
1933                                         con->bytes_written_cur_second = 0;
1934
1935                                         if (changed) {
1936                                                 connection_state_machine(srv, con);
1937                                         }
1938
1939 #if DEBUG_CONNECTION_STATES
1940                                         if (cs == 0) {
1941                                                 fprintf(stderr, "connection-state: ");
1942                                                 cs = 1;
1943                                         }
1944
1945                                         fprintf(stderr, "c[%d,%d]: %s ",
1946                                                 con->fd,
1947                                                 con->fcgi.fd,
1948                                                 connection_get_state(con->state));
1949 #endif
1950                                 }
1951
1952 #ifdef DEBUG_CONNECTION_STATES
1953                                 if (cs == 1) fprintf(stderr, "\n");
1954 #endif
1955                         }
1956                 }
1957
1958                 if (graceful_shutdown) {
1959                         server_graceful_state(srv);
1960                         srv->sockets_disabled = 1;
1961                 } else if (srv->sockets_disabled) {
1962                         /* our server sockets are disabled, why ? */
1963
1964                         if ((srv->cur_fds + srv->want_fds < srv->max_fds * 8 / 10) && /* we have enough unused fds */
1965                             (srv->conns->used <= srv->max_conns * 9 / 10)) {
1966                                 server_sockets_set_event(srv, FDEVENT_IN);
1967                                 log_error_write(srv, __FILE__, __LINE__, "s", "[note] sockets enabled again");
1968
1969                                 srv->sockets_disabled = 0;
1970                         }
1971                 } else {
1972                         if ((srv->cur_fds + srv->want_fds > srv->max_fds * 9 / 10) || /* out of fds */
1973                             (srv->conns->used >= srv->max_conns)) { /* out of connections */
1974                                 /* disable server-fds */
1975                                 server_sockets_set_event(srv, 0);
1976
1977                                 if (srv->conns->used >= srv->max_conns) {
1978                                         log_error_write(srv, __FILE__, __LINE__, "s", "[note] sockets disabled, connection limit reached");
1979                                 } else {
1980                                         log_error_write(srv, __FILE__, __LINE__, "s", "[note] sockets disabled, out-of-fds");
1981                                 }
1982
1983                                 srv->sockets_disabled = 1;
1984                         }
1985                 }
1986
1987                 if (graceful_shutdown && srv->conns->used == 0) {
1988                         /* we are in graceful shutdown phase and all connections are closed
1989                          * we are ready to terminate without harming anyone */
1990                         srv_shutdown = 1;
1991                         break;
1992                 }
1993
1994                 /* we still have some fds to share */
1995                 if (srv->want_fds) {
1996                         /* check the fdwaitqueue for waiting fds */
1997                         int free_fds = srv->max_fds - srv->cur_fds - 16;
1998                         connection *con;
1999
2000                         for (; free_fds > 0 && NULL != (con = fdwaitqueue_unshift(srv, srv->fdwaitqueue)); free_fds--) {
2001                                 connection_state_machine(srv, con);
2002
2003                                 srv->want_fds--;
2004                         }
2005                 }
2006
2007                 if ((n = fdevent_poll(srv->ev, 1000)) > 0) {
2008                         /* n is the number of events */
2009                         int fd;
2010                         int revents;
2011                         int fd_ndx;
2012                         last_active_ts = srv->cur_ts;
2013                         fd_ndx = -1;
2014                         do {
2015                                 fdevent_handler handler;
2016                                 void *context;
2017
2018                                 fd_ndx  = fdevent_event_next_fdndx (srv->ev, fd_ndx);
2019                                 if (-1 == fd_ndx) break; /* not all fdevent handlers know how many fds got an event */
2020
2021                                 revents = fdevent_event_get_revent (srv->ev, fd_ndx);
2022                                 fd      = fdevent_event_get_fd     (srv->ev, fd_ndx);
2023                                 handler = fdevent_get_handler(srv->ev, fd);
2024                                 context = fdevent_get_context(srv->ev, fd);
2025                                 if (NULL != handler) {
2026                                         (*handler)(srv, context, revents);
2027                                 }
2028                         } while (--n > 0);
2029                         fdevent_sched_run(srv, srv->ev);
2030                 } else if (n < 0 && errno != EINTR) {
2031                         log_error_write(srv, __FILE__, __LINE__, "ss",
2032                                         "fdevent_poll failed:",
2033                                         strerror(errno));
2034                 }
2035
2036                 for (ndx = 0; ndx < srv->joblist->used; ndx++) {
2037                         connection *con = srv->joblist->ptr[ndx];
2038                         connection_state_machine(srv, con);
2039                 }
2040
2041                 srv->joblist->used = 0;
2042         }
2043
2044         if (graceful_shutdown || graceful_restart) {
2045                 server_graceful_state(srv);
2046         }
2047
2048         if (2 == graceful_shutdown) { /* value 2 indicates idle timeout */
2049                 log_error_write(srv, __FILE__, __LINE__, "s",
2050                                 "server stopped after idle timeout");
2051         } else {
2052 #ifdef HAVE_SIGACTION
2053                 log_error_write(srv, __FILE__, __LINE__, "sdsd",
2054                                 "server stopped by UID =",
2055                                 last_sigterm_info.si_uid,
2056                                 "PID =",
2057                                 last_sigterm_info.si_pid);
2058 #else
2059                 log_error_write(srv, __FILE__, __LINE__, "s",
2060                                 "server stopped");
2061 #endif
2062         }
2063
2064         return 0;
2065 }
2066
2067 int main (int argc, char **argv) {
2068     int rc;
2069
2070   #ifdef HAVE_GETUID
2071   #ifndef HAVE_ISSETUGID
2072   #define issetugid() (geteuid() != getuid() || getegid() != getgid())
2073   #endif
2074     if (0 != getuid() && issetugid()) { /*check as early as possible in main()*/
2075         fprintf(stderr,
2076                 "Are you nuts ? Don't apply a SUID bit to this binary\n");
2077         return -1;
2078     }
2079   #endif
2080
2081     /* for nice %b handling in strftime() */
2082     setlocale(LC_TIME, "C");
2083
2084     do {
2085         server * const srv = server_init();
2086
2087         if (graceful_restart) {
2088             server_sockets_restore(srv);
2089             optind = 1;
2090         }
2091
2092         rc = server_main(srv, argc, argv);
2093
2094         /* clean-up */
2095         remove_pid_file(srv);
2096         log_error_close(srv);
2097         if (graceful_restart)
2098             server_sockets_save(srv);
2099         else
2100             network_close(srv);
2101         connections_free(srv);
2102         plugins_free(srv);
2103         server_free(srv);
2104
2105         if (0 != rc || !graceful_restart) break;
2106
2107         /* wait for all children to exit before graceful restart */
2108         while (waitpid(-1, NULL, 0) > 0) ;
2109     } while (graceful_restart);
2110
2111     return rc;
2112 }