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_chunk.h"
  13 #include "fdevent.h"
  14 #include "connections.h"
  15 #include "stat_cache.h"
  16 #include "plugin.h"
  17 #include "joblist.h"
  18 #include "network_backends.h"
  19 #include "version.h"
  20
  21 #include <sys/types.h>
  22 #include <sys/time.h>
  23 #include <sys/stat.h>
  24
  25 #include <string.h>
  26 #include <errno.h>
  27 #include <fcntl.h>
  28 #include <unistd.h>
  29 #include <stdlib.h>
  30 #include <time.h>
  31 #include <signal.h>
  32 #include <assert.h>
  33 #include <locale.h>
  34
  35 #include <stdio.h>
  36
  37 #ifdef HAVE_GETOPT_H
  38 # include <getopt.h>
  39 #endif
  40
  41 #ifdef HAVE_VALGRIND_VALGRIND_H
  42 # include <valgrind/valgrind.h>
  43 #endif
  44
  45 #ifdef HAVE_SYS_WAIT_H
  46 # include <sys/wait.h>
  47 #endif
  48
  49 #ifdef HAVE_PWD_H
  50 # include <grp.h>
  51 # include <pwd.h>
  52 #endif
  53
  54 #ifdef HAVE_SYS_RESOURCE_H
  55 # include <sys/resource.h>
  56 #endif
  57
  58 #ifdef HAVE_SYS_PRCTL_H
  59 # include <sys/prctl.h>
  60 #endif
  61
  62 #ifdef USE_OPENSSL
  63 # include <openssl/err.h>
  64 #endif
  65
  66 #ifndef __sgi
  67 /* IRIX doesn't like the alarm based time() optimization */
  68 /* #define USE_ALARM */
  69 #endif
  70
  71 #ifdef HAVE_GETUID
  72 # ifndef HAVE_ISSETUGID
  73
  74 static int l_issetugid(void) {
  75         return (geteuid() != getuid() || getegid() != getgid());
  76 }
  77
  78 #  define issetugid l_issetugid
  79 # endif
  80 #endif
  81
  82 static int oneshot_fd = 0;
  83 static volatile sig_atomic_t srv_shutdown = 0;
  84 static volatile sig_atomic_t graceful_shutdown = 0;
  85 static volatile sig_atomic_t handle_sig_alarm = 1;
  86 static volatile sig_atomic_t handle_sig_hup = 0;
  87 static volatile sig_atomic_t forwarded_sig_hup = 0;
  88
  89 #if defined(HAVE_SIGACTION) && defined(SA_SIGINFO)
  90 static volatile siginfo_t last_sigterm_info;
  91 static volatile siginfo_t last_sighup_info;
  92
  93 static void sigaction_handler(int sig, siginfo_t *si, void *context) {
  94         static siginfo_t empty_siginfo;
  95         UNUSED(context);
  96
  97         if (!si) si = &empty_siginfo;
  98
  99         switch (sig) {
 100         case SIGTERM:
 101                 srv_shutdown = 1;
 102                 last_sigterm_info = *si;
 103                 break;
 104         case SIGINT:
 105                 if (graceful_shutdown) {
 106                         srv_shutdown = 1;
 107                 } else {
 108                         graceful_shutdown = 1;
 109                 }
 110                 last_sigterm_info = *si;
 111
 112                 break;
 113         case SIGALRM:
 114                 handle_sig_alarm = 1;
 115                 break;
 116         case SIGHUP:
 117                 /**
 118                  * we send the SIGHUP to all procs in the process-group
 119                  * this includes ourself
 120                  *
 121                  * make sure we only send it once and don't create a
 122                  * infinite loop
 123                  */
 124                 if (!forwarded_sig_hup) {
 125                         handle_sig_hup = 1;
 126                         last_sighup_info = *si;
 127                 } else {
 128                         forwarded_sig_hup = 0;
 129                 }
 130                 break;
 131         case SIGCHLD:
 132                 break;
 133         }
 134 }
 135 #elif defined(HAVE_SIGNAL) || defined(HAVE_SIGACTION)
 136 static void signal_handler(int sig) {
 137         switch (sig) {
 138         case SIGTERM: srv_shutdown = 1; break;
 139         case SIGINT:
 140              if (graceful_shutdown) srv_shutdown = 1;
 141              else graceful_shutdown = 1;
 142
 143              break;
 144         case SIGALRM: handle_sig_alarm = 1; break;
 145         case SIGHUP:  handle_sig_hup = 1; break;
 146         case SIGCHLD:  break;
 147         }
 148 }
 149 #endif
 150
 151 #ifdef HAVE_FORK
 152 static int daemonize(void) {
 153         int pipefd[2];
 154         pid_t pid;
 155 #ifdef SIGTTOU
 156         signal(SIGTTOU, SIG_IGN);
 157 #endif
 158 #ifdef SIGTTIN
 159         signal(SIGTTIN, SIG_IGN);
 160 #endif
 161 #ifdef SIGTSTP
 162         signal(SIGTSTP, SIG_IGN);
 163 #endif
 164
 165         if (pipe(pipefd) < 0) exit(-1);
 166
 167         if (0 > (pid = fork())) exit(-1);
 168
 169         if (0 < pid) {
 170                 char buf;
 171                 ssize_t bytes;
 172
 173                 close(pipefd[1]);
 174                 /* parent waits for grandchild to be ready */
 175                 do {
 176                         bytes = read(pipefd[0], &buf, sizeof(buf));
 177                 } while (bytes < 0 && EINTR == errno);
 178                 close(pipefd[0]);
 179
 180                 if (bytes <= 0) {
 181                         /* closed fd (without writing) == failure in grandchild */
 182                         fputs("daemonized server failed to start; check error log for details\n", stderr);
 183                         exit(-1);
 184                 }
 185
 186                 exit(0);
 187         }
 188
 189         close(pipefd[0]);
 190
 191         if (-1 == setsid()) exit(0);
 192
 193         signal(SIGHUP, SIG_IGN);
 194
 195         if (0 != fork()) exit(0);
 196
 197         if (0 != chdir("/")) exit(0);
 198
 199         fd_close_on_exec(pipefd[1]);
 200         return pipefd[1];
 201 }
 202 #endif
 203
 204 static server *server_init(void) {
 205         int i;
 206         server *srv = calloc(1, sizeof(*srv));
 207         force_assert(srv);
 208 #define CLEAN(x) \
 209         srv->x = buffer_init();
 210
 211         CLEAN(response_header);
 212         CLEAN(parse_full_path);
 213         CLEAN(ts_debug_str);
 214         CLEAN(ts_date_str);
 215         CLEAN(errorlog_buf);
 216         CLEAN(response_range);
 217         CLEAN(tmp_buf);
 218         srv->empty_string = buffer_init_string("");
 219         CLEAN(cond_check_buf);
 220
 221         CLEAN(srvconf.errorlog_file);
 222         CLEAN(srvconf.breakagelog_file);
 223         CLEAN(srvconf.groupname);
 224         CLEAN(srvconf.username);
 225         CLEAN(srvconf.changeroot);
 226         CLEAN(srvconf.bindhost);
 227         CLEAN(srvconf.event_handler);
 228         CLEAN(srvconf.pid_file);
 229
 230         CLEAN(tmp_chunk_len);
 231 #undef CLEAN
 232
 233 #define CLEAN(x) \
 234         srv->x = array_init();
 235
 236         CLEAN(config_context);
 237         CLEAN(config_touched);
 238         CLEAN(status);
 239 #undef CLEAN
 240
 241         for (i = 0; i < FILE_CACHE_MAX; i++) {
 242                 srv->mtime_cache[i].mtime = (time_t)-1;
 243                 srv->mtime_cache[i].str = buffer_init();
 244         }
 245
 246         li_rand_reseed();
 247         li_rand_bytes((unsigned char *)srv->entropy, (int)sizeof(srv->entropy));
 248
 249         srv->cur_ts = time(NULL);
 250         srv->startup_ts = srv->cur_ts;
 251
 252         srv->conns = calloc(1, sizeof(*srv->conns));
 253         force_assert(srv->conns);
 254
 255         srv->joblist = calloc(1, sizeof(*srv->joblist));
 256         force_assert(srv->joblist);
 257
 258         srv->fdwaitqueue = calloc(1, sizeof(*srv->fdwaitqueue));
 259         force_assert(srv->fdwaitqueue);
 260
 261         srv->srvconf.modules = array_init();
 262         srv->srvconf.modules_dir = buffer_init_string(LIBRARY_DIR);
 263         srv->srvconf.network_backend = buffer_init();
 264         srv->srvconf.upload_tempdirs = array_init();
 265         srv->srvconf.reject_expect_100_with_417 = 1;
 266         srv->srvconf.xattr_name = buffer_init_string("Content-Type");
 267         srv->srvconf.http_header_strict  = 1;
 268         srv->srvconf.http_host_strict    = 1; /*(implies http_host_normalize)*/
 269         srv->srvconf.http_host_normalize = 0;
 270         srv->srvconf.high_precision_timestamps = 0;
 271         srv->srvconf.max_request_field_size = 8192;
 272
 273         /* use syslog */
 274         srv->errorlog_fd = STDERR_FILENO;
 275         srv->errorlog_mode = ERRORLOG_FD;
 276
 277         srv->split_vals = array_init();
 278
 279         return srv;
 280 }
 281
 282 static void server_free(server *srv) {
 283         size_t i;
 284
 285         for (i = 0; i < FILE_CACHE_MAX; i++) {
 286                 buffer_free(srv->mtime_cache[i].str);
 287         }
 288
 289         if (oneshot_fd > 0) {
 290                 close(oneshot_fd);
 291         }
 292
 293 #define CLEAN(x) \
 294         buffer_free(srv->x);
 295
 296         CLEAN(response_header);
 297         CLEAN(parse_full_path);
 298         CLEAN(ts_debug_str);
 299         CLEAN(ts_date_str);
 300         CLEAN(errorlog_buf);
 301         CLEAN(response_range);
 302         CLEAN(tmp_buf);
 303         CLEAN(empty_string);
 304         CLEAN(cond_check_buf);
 305
 306         CLEAN(srvconf.errorlog_file);
 307         CLEAN(srvconf.breakagelog_file);
 308         CLEAN(srvconf.groupname);
 309         CLEAN(srvconf.username);
 310         CLEAN(srvconf.changeroot);
 311         CLEAN(srvconf.bindhost);
 312         CLEAN(srvconf.event_handler);
 313         CLEAN(srvconf.pid_file);
 314         CLEAN(srvconf.modules_dir);
 315         CLEAN(srvconf.network_backend);
 316         CLEAN(srvconf.xattr_name);
 317
 318         CLEAN(tmp_chunk_len);
 319 #undef CLEAN
 320
 321 #if 0
 322         fdevent_unregister(srv->ev, srv->fd);
 323 #endif
 324         fdevent_free(srv->ev);
 325
 326         free(srv->conns);
 327
 328         if (srv->config_storage) {
 329                 for (i = 0; i < srv->config_context->used; i++) {
 330                         specific_config *s = srv->config_storage[i];
 331
 332                         if (!s) continue;
 333
 334                         buffer_free(s->document_root);
 335                         buffer_free(s->server_name);
 336                         buffer_free(s->server_tag);
 337                         buffer_free(s->ssl_pemfile);
 338                         buffer_free(s->ssl_ca_file);
 339                         buffer_free(s->ssl_cipher_list);
 340                         buffer_free(s->ssl_dh_file);
 341                         buffer_free(s->ssl_ec_curve);
 342                         buffer_free(s->error_handler);
 343                         buffer_free(s->error_handler_404);
 344                         buffer_free(s->errorfile_prefix);
 345                         array_free(s->mimetypes);
 346                         buffer_free(s->ssl_verifyclient_username);
 347 #ifdef USE_OPENSSL
 348                         SSL_CTX_free(s->ssl_ctx);
 349                         EVP_PKEY_free(s->ssl_pemfile_pkey);
 350                         X509_free(s->ssl_pemfile_x509);
 351                         if (NULL != s->ssl_ca_file_cert_names) sk_X509_NAME_pop_free(s->ssl_ca_file_cert_names, X509_NAME_free);
 352 #endif
 353                         free(s);
 354                 }
 355                 free(srv->config_storage);
 356                 srv->config_storage = NULL;
 357         }
 358
 359 #define CLEAN(x) \
 360         array_free(srv->x);
 361
 362         CLEAN(config_context);
 363         CLEAN(config_touched);
 364         CLEAN(status);
 365         CLEAN(srvconf.upload_tempdirs);
 366 #undef CLEAN
 367
 368         joblist_free(srv, srv->joblist);
 369         fdwaitqueue_free(srv, srv->fdwaitqueue);
 370
 371         if (srv->stat_cache) {
 372                 stat_cache_free(srv->stat_cache);
 373         }
 374
 375         array_free(srv->srvconf.modules);
 376         array_free(srv->split_vals);
 377
 378 #ifdef USE_OPENSSL
 379         if (srv->ssl_is_init) {
 380                 CRYPTO_cleanup_all_ex_data();
 381                 ERR_free_strings();
 382               #if   OPENSSL_VERSION_NUMBER >= 0x10100000L \
 383                 && !defined(LIBRESSL_VERSION_NUMBER)
 384                 /*(OpenSSL libraries handle thread init and deinit)
 385                  * https://github.com/openssl/openssl/pull/1048 */
 386               #elif OPENSSL_VERSION_NUMBER >= 0x10000000L
 387                 ERR_remove_thread_state(NULL);
 388               #else
 389                 ERR_remove_state(0);
 390               #endif
 391                 EVP_cleanup();
 392         }
 393 #endif
 394         li_rand_cleanup();
 395
 396         free(srv);
 397 }
 398
 399 static void remove_pid_file(server *srv, int *pid_fd) {
 400         if (!buffer_string_is_empty(srv->srvconf.pid_file) && 0 <= *pid_fd) {
 401                 if (0 != ftruncate(*pid_fd, 0)) {
 402                         log_error_write(srv, __FILE__, __LINE__, "sbds",
 403                                         "ftruncate failed for:",
 404                                         srv->srvconf.pid_file,
 405                                         errno,
 406                                         strerror(errno));
 407                 }
 408         }
 409         if (0 <= *pid_fd) {
 410                 close(*pid_fd);
 411                 *pid_fd = -1;
 412         }
 413         if (!buffer_string_is_empty(srv->srvconf.pid_file) &&
 414             buffer_string_is_empty(srv->srvconf.changeroot)) {
 415                 if (0 != unlink(srv->srvconf.pid_file->ptr)) {
 416                         if (errno != EACCES && errno != EPERM) {
 417                                 log_error_write(srv, __FILE__, __LINE__, "sbds",
 418                                                 "unlink failed for:",
 419                                                 srv->srvconf.pid_file,
 420                                                 errno,
 421                                                 strerror(errno));
 422                         }
 423                 }
 424         }
 425 }
 426
 427
 428 static server_socket * server_oneshot_getsock(server *srv, sock_addr *cnt_addr) {
 429         server_socket *srv_socket, *srv_socket_wild = NULL;
 430         size_t i;
 431         for (i = 0; i < srv->srv_sockets.used; ++i) {
 432                 srv_socket = srv->srv_sockets.ptr[i];
 433                 if (cnt_addr->plain.sa_family != srv_socket->addr.plain.sa_family) continue;
 434                 switch (cnt_addr->plain.sa_family) {
 435                 case AF_INET:
 436                         if (srv_socket->addr.ipv4.sin_port != cnt_addr->ipv4.sin_port) continue;
 437                         if (srv_socket->addr.ipv4.sin_addr.s_addr == cnt_addr->ipv4.sin_addr.s_addr) {
 438                                 return srv_socket;
 439                         }
 440                         if (srv_socket->addr.ipv4.sin_addr.s_addr == htonl(INADDR_ANY)) {
 441                                 srv_socket_wild = srv_socket;
 442                         }
 443                         continue;
 444                 #ifdef HAVE_IPV6
 445                 case AF_INET6:
 446                         if (srv_socket->addr.ipv6.sin6_port != cnt_addr->ipv6.sin6_port) continue;
 447                         if (0 == memcmp(&srv_socket->addr.ipv6.sin6_addr, &cnt_addr->ipv6.sin6_addr, sizeof(struct in6_addr))) {
 448                                 return srv_socket;
 449                         }
 450                         if (0 == memcmp(&srv_socket->addr.ipv6.sin6_addr, &in6addr_any, sizeof(struct in6_addr))) {
 451                                 srv_socket_wild = srv_socket;
 452                         }
 453                         continue;
 454                 #endif
 455                 #ifdef HAVE_SYS_UN_H
 456                 case AF_UNIX:
 457                         if (0 == strcmp(srv_socket->addr.un.sun_path, cnt_addr->un.sun_path)) {
 458                                 return srv_socket;
 459                         }
 460                         continue;
 461                 #endif
 462                 default: continue;
 463                 }
 464         }
 465
 466         if (NULL != srv_socket_wild) {
 467                 return srv_socket_wild;
 468         } else if (srv->srv_sockets.used) {
 469                 return srv->srv_sockets.ptr[0];
 470         } else {
 471                 log_error_write(srv, __FILE__, __LINE__, "s", "no sockets configured");
 472                 return NULL;
 473         }
 474 }
 475
 476
 477 static int server_oneshot_init(server *srv, int fd) {
 478         /* Note: does not work with netcat due to requirement that fd be socket.
 479          * STDOUT_FILENO was not saved earlier in startup, and that is to where
 480          * netcat expects output to be sent.  Since lighttpd expects connections
 481          * to be sockets, con->fd is where output is sent; separate fds are not
 482          * stored for input and output, but netcat has different fds for stdin
 483          * and * stdout.  To support netcat, would additionally need to avoid
 484          * S_ISSOCK(), getsockname(), and getpeername() below, reconstructing
 485          * addresses from environment variables:
 486          *   NCAT_LOCAL_ADDR   NCAT_LOCAL_PORT
 487          *   NCAT_REMOTE_ADDR  NCAT_REMOTE_PORT
 488          *   NCAT_PROTO
 489          */
 490         connection *con;
 491         server_socket *srv_socket;
 492         sock_addr cnt_addr;
 493         socklen_t cnt_len;
 494         struct stat st;
 495
 496         if (0 != fstat(fd, &st)) {
 497                 log_error_write(srv, __FILE__, __LINE__, "ss", "fstat:", strerror(errno));
 498                 return 0;
 499         }
 500
 501         if (!S_ISSOCK(st.st_mode)) {
 502                 /* require that fd is a socket
 503                  * (modules might expect STDIN_FILENO and STDOUT_FILENO opened to /dev/null) */
 504                 log_error_write(srv, __FILE__, __LINE__, "s", "lighttpd -1 stdin is not a socket");
 505                 return 0;
 506         }
 507
 508         cnt_len = sizeof(cnt_addr);
 509         if (0 != getsockname(fd, (struct sockaddr *)&cnt_addr, &cnt_len)) {
 510                 log_error_write(srv, __FILE__, __LINE__, "ss", "getsockname:", strerror(errno));
 511                 return 0;
 512         }
 513
 514         srv_socket = server_oneshot_getsock(srv, &cnt_addr);
 515         if (NULL == srv_socket) return 0;
 516
 517         cnt_len = sizeof(cnt_addr);
 518         if (0 != getpeername(fd, (struct sockaddr *)&cnt_addr, &cnt_len)) {
 519                 log_error_write(srv, __FILE__, __LINE__, "ss", "getpeername:", strerror(errno));
 520                 return 0;
 521         }
 522
 523         if (cnt_addr.plain.sa_family != AF_UNIX) {
 524                 network_accept_tcp_nagle_disable(fd);
 525         }
 526
 527         con = connection_accepted(srv, srv_socket, &cnt_addr, fd);
 528         if (NULL == con) return 0;
 529
 530         connection_state_machine(srv, con);
 531         return 1;
 532 }
 533
 534
 535 static void show_version (void) {
 536 #ifdef USE_OPENSSL
 537 # define TEXT_SSL " (ssl)"
 538 #else
 539 # define TEXT_SSL
 540 #endif
 541         char *b = PACKAGE_DESC TEXT_SSL \
 542 " - a light and fast webserver\n" \
 543 "Build-Date: " __DATE__ " " __TIME__ "\n";
 544 ;
 545 #undef TEXT_SSL
 546         write_all(STDOUT_FILENO, b, strlen(b));
 547 }
 548
 549 static void show_features (void) {
 550   const char features[] = ""
 551 #ifdef USE_SELECT
 552       "\t+ select (generic)\n"
 553 #else
 554       "\t- select (generic)\n"
 555 #endif
 556 #ifdef USE_POLL
 557       "\t+ poll (Unix)\n"
 558 #else
 559       "\t- poll (Unix)\n"
 560 #endif
 561 #ifdef USE_LINUX_SIGIO
 562       "\t+ rt-signals (Linux 2.4+)\n"
 563 #else
 564       "\t- rt-signals (Linux 2.4+)\n"
 565 #endif
 566 #ifdef USE_LINUX_EPOLL
 567       "\t+ epoll (Linux 2.6)\n"
 568 #else
 569       "\t- epoll (Linux 2.6)\n"
 570 #endif
 571 #ifdef USE_SOLARIS_DEVPOLL
 572       "\t+ /dev/poll (Solaris)\n"
 573 #else
 574       "\t- /dev/poll (Solaris)\n"
 575 #endif
 576 #ifdef USE_SOLARIS_PORT
 577       "\t+ eventports (Solaris)\n"
 578 #else
 579       "\t- eventports (Solaris)\n"
 580 #endif
 581 #ifdef USE_FREEBSD_KQUEUE
 582       "\t+ kqueue (FreeBSD)\n"
 583 #else
 584       "\t- kqueue (FreeBSD)\n"
 585 #endif
 586 #ifdef USE_LIBEV
 587       "\t+ libev (generic)\n"
 588 #else
 589       "\t- libev (generic)\n"
 590 #endif
 591       "\nNetwork handler:\n\n"
 592 #if defined USE_LINUX_SENDFILE
 593       "\t+ linux-sendfile\n"
 594 #else
 595       "\t- linux-sendfile\n"
 596 #endif
 597 #if defined USE_FREEBSD_SENDFILE
 598       "\t+ freebsd-sendfile\n"
 599 #else
 600       "\t- freebsd-sendfile\n"
 601 #endif
 602 #if defined USE_DARWIN_SENDFILE
 603       "\t+ darwin-sendfile\n"
 604 #else
 605       "\t- darwin-sendfile\n"
 606 #endif
 607 #if defined USE_SOLARIS_SENDFILEV
 608       "\t+ solaris-sendfilev\n"
 609 #else
 610       "\t- solaris-sendfilev\n"
 611 #endif
 612 #if defined USE_WRITEV
 613       "\t+ writev\n"
 614 #else
 615       "\t- writev\n"
 616 #endif
 617       "\t+ write\n"
 618 #ifdef USE_MMAP
 619       "\t+ mmap support\n"
 620 #else
 621       "\t- mmap support\n"
 622 #endif
 623       "\nFeatures:\n\n"
 624 #ifdef HAVE_IPV6
 625       "\t+ IPv6 support\n"
 626 #else
 627       "\t- IPv6 support\n"
 628 #endif
 629 #if defined HAVE_ZLIB_H && defined HAVE_LIBZ
 630       "\t+ zlib support\n"
 631 #else
 632       "\t- zlib support\n"
 633 #endif
 634 #if defined HAVE_BZLIB_H && defined HAVE_LIBBZ2
 635       "\t+ bzip2 support\n"
 636 #else
 637       "\t- bzip2 support\n"
 638 #endif
 639 #if defined(HAVE_CRYPT) || defined(HAVE_CRYPT_R) || defined(HAVE_LIBCRYPT)
 640       "\t+ crypt support\n"
 641 #else
 642       "\t- crypt support\n"
 643 #endif
 644 #ifdef USE_OPENSSL
 645       "\t+ SSL Support\n"
 646 #else
 647       "\t- SSL Support\n"
 648 #endif
 649 #ifdef HAVE_LIBPCRE
 650       "\t+ PCRE support\n"
 651 #else
 652       "\t- PCRE support\n"
 653 #endif
 654 #ifdef HAVE_MYSQL
 655       "\t+ MySQL support\n"
 656 #else
 657       "\t- MySQL support\n"
 658 #endif
 659 #ifdef HAVE_KRB5
 660       "\t+ Kerberos support\n"
 661 #else
 662       "\t- Kerberos support\n"
 663 #endif
 664 #if defined(HAVE_LDAP_H) && defined(HAVE_LBER_H) && defined(HAVE_LIBLDAP) && defined(HAVE_LIBLBER)
 665       "\t+ LDAP support\n"
 666 #else
 667       "\t- LDAP support\n"
 668 #endif
 669 #ifdef USE_MEMCACHED
 670       "\t+ memcached support\n"
 671 #else
 672       "\t- memcached support\n"
 673 #endif
 674 #ifdef HAVE_FAM_H
 675       "\t+ FAM support\n"
 676 #else
 677       "\t- FAM support\n"
 678 #endif
 679 #ifdef HAVE_LUA_H
 680       "\t+ LUA support\n"
 681 #else
 682       "\t- LUA support\n"
 683 #endif
 684 #ifdef HAVE_LIBXML_H
 685       "\t+ xml support\n"
 686 #else
 687       "\t- xml support\n"
 688 #endif
 689 #ifdef HAVE_SQLITE3_H
 690       "\t+ SQLite support\n"
 691 #else
 692       "\t- SQLite support\n"
 693 #endif
 694 #ifdef HAVE_GDBM_H
 695       "\t+ GDBM support\n"
 696 #else
 697       "\t- GDBM support\n"
 698 #endif
 699       "\n";
 700   show_version();
 701   printf("\nEvent Handlers:\n\n%s", features);
 702 }
 703
 704 static void show_help (void) {
 705 #ifdef USE_OPENSSL
 706 # define TEXT_SSL " (ssl)"
 707 #else
 708 # define TEXT_SSL
 709 #endif
 710         char *b = PACKAGE_DESC TEXT_SSL " ("__DATE__ " " __TIME__ ")" \
 711 " - a light and fast webserver\n" \
 712 "usage:\n" \
 713 " -f <name>  filename of the config-file\n" \
 714 " -m <name>  module directory (default: "LIBRARY_DIR")\n" \
 715 " -i <secs>  graceful shutdown after <secs> of inactivity\n" \
 716 " -1         process single (one) request on stdin socket, then exit\n" \
 717 " -p         print the parsed config-file in internal form, and exit\n" \
 718 " -t         test config-file syntax, then exit\n" \
 719 " -tt        test config-file syntax, load and init modules, then exit\n" \
 720 " -D         don't go to background (default: go to background)\n" \
 721 " -v         show version\n" \
 722 " -V         show compile-time features\n" \
 723 " -h         show this help\n" \
 724 "\n"
 725 ;
 726 #undef TEXT_SSL
 727 #undef TEXT_IPV6
 728         write_all(STDOUT_FILENO, b, strlen(b));
 729 }
 730
 731 int main (int argc, char **argv) {
 732         server *srv = NULL;
 733         int print_config = 0;
 734         int test_config = 0;
 735         int i_am_root;
 736         int o;
 737         int num_childs = 0;
 738         int pid_fd = -1, fd;
 739         size_t i;
 740         time_t idle_limit = 0, last_active_ts = time(NULL);
 741 #ifdef HAVE_SIGACTION
 742         struct sigaction act;
 743 #endif
 744 #ifdef HAVE_GETRLIMIT
 745         struct rlimit rlim;
 746 #endif
 747
 748 #ifdef HAVE_FORK
 749         int parent_pipe_fd = -1;
 750 #endif
 751
 752 #ifdef USE_ALARM
 753         struct itimerval interval;
 754
 755         interval.it_interval.tv_sec = 1;
 756         interval.it_interval.tv_usec = 0;
 757         interval.it_value.tv_sec = 1;
 758         interval.it_value.tv_usec = 0;
 759 #endif
 760
 761         /* for nice %b handling in strfime() */
 762         setlocale(LC_TIME, "C");
 763
 764         if (NULL == (srv = server_init())) {
 765                 fprintf(stderr, "did this really happen?\n");
 766                 return -1;
 767         }
 768
 769         /* init structs done */
 770
 771         srv->srvconf.port = 0;
 772 #ifdef HAVE_GETUID
 773         i_am_root = (getuid() == 0);
 774 #else
 775         i_am_root = 0;
 776 #endif
 777         srv->srvconf.dont_daemonize = 0;
 778         srv->srvconf.preflight_check = 0;
 779
 780         while(-1 != (o = getopt(argc, argv, "f:m:i:hvVD1pt"))) {
 781                 switch(o) {
 782                 case 'f':
 783                         if (srv->config_storage) {
 784                                 log_error_write(srv, __FILE__, __LINE__, "s",
 785                                                 "Can only read one config file. Use the include command to use multiple config files.");
 786
 787                                 server_free(srv);
 788                                 return -1;
 789                         }
 790                         if (config_read(srv, optarg)) {
 791                                 server_free(srv);
 792                                 return -1;
 793                         }
 794                         break;
 795                 case 'm':
 796                         buffer_copy_string(srv->srvconf.modules_dir, optarg);
 797                         break;
 798                 case 'i': {
 799                         char *endptr;
 800                         long timeout = strtol(optarg, &endptr, 0);
 801                         if (!*optarg || *endptr || timeout < 0) {
 802                                 log_error_write(srv, __FILE__, __LINE__, "ss",
 803                                                 "Invalid idle timeout value:", optarg);
 804                                 server_free(srv);
 805                                 return -1;
 806                         }
 807                         idle_limit = (time_t)timeout;
 808                         break;
 809                 }
 810                 case 'p': print_config = 1; break;
 811                 case 't': ++test_config; break;
 812                 case '1': oneshot_fd = dup(STDIN_FILENO); break;
 813                 case 'D': srv->srvconf.dont_daemonize = 1; break;
 814                 case 'v': show_version(); server_free(srv); return 0;
 815                 case 'V': show_features(); server_free(srv); return 0;
 816                 case 'h': show_help(); server_free(srv); return 0;
 817                 default:
 818                         show_help();
 819                         server_free(srv);
 820                         return -1;
 821                 }
 822         }
 823
 824         if (!srv->config_storage) {
 825                 log_error_write(srv, __FILE__, __LINE__, "s",
 826                                 "No configuration available. Try using -f option.");
 827
 828                 server_free(srv);
 829                 return -1;
 830         }
 831
 832         if (print_config) {
 833                 data_unset *dc = srv->config_context->data[0];
 834                 if (dc) {
 835                         dc->print(dc, 0);
 836                         fprintf(stdout, "\n");
 837                 } else {
 838                         /* shouldn't happend */
 839                         fprintf(stderr, "global config not found\n");
 840                 }
 841         }
 842
 843         if (test_config) {
 844                 if (1 == test_config) {
 845                         printf("Syntax OK\n");
 846                 } else { /*(test_config > 1)*/
 847                         test_config = 0;
 848                         srv->srvconf.preflight_check = 1;
 849                         srv->srvconf.dont_daemonize = 1;
 850                         buffer_reset(srv->srvconf.pid_file);
 851                 }
 852         }
 853
 854         if (test_config || print_config) {
 855                 server_free(srv);
 856                 return 0;
 857         }
 858
 859         if (oneshot_fd) {
 860                 if (oneshot_fd <= STDERR_FILENO) {
 861                         log_error_write(srv, __FILE__, __LINE__, "s",
 862                                         "Invalid fds at startup with lighttpd -1");
 863                         server_free(srv);
 864                         return -1;
 865                 }
 866                 graceful_shutdown = 1;
 867                 srv->sockets_disabled = 1;
 868                 srv->srvconf.dont_daemonize = 1;
 869                 buffer_reset(srv->srvconf.pid_file);
 870                 if (srv->srvconf.max_worker) {
 871                         srv->srvconf.max_worker = 0;
 872                         log_error_write(srv, __FILE__, __LINE__, "s",
 873                                         "server one-shot command line option disables server.max-worker config file option.");
 874                 }
 875         }
 876
 877         /* close stdin and stdout, as they are not needed */
 878         openDevNull(STDIN_FILENO);
 879         openDevNull(STDOUT_FILENO);
 880
 881         if (0 != config_set_defaults(srv)) {
 882                 log_error_write(srv, __FILE__, __LINE__, "s",
 883                                 "setting default values failed");
 884                 server_free(srv);
 885                 return -1;
 886         }
 887
 888         /* UID handling */
 889 #ifdef HAVE_GETUID
 890         if (!i_am_root && issetugid()) {
 891                 /* we are setuid-root */
 892
 893                 log_error_write(srv, __FILE__, __LINE__, "s",
 894                                 "Are you nuts ? Don't apply a SUID bit to this binary");
 895
 896                 server_free(srv);
 897                 return -1;
 898         }
 899 #endif
 900
 901         /* check document-root */
 902         if (buffer_string_is_empty(srv->config_storage[0]->document_root)) {
 903                 log_error_write(srv, __FILE__, __LINE__, "s",
 904                                 "document-root is not set\n");
 905
 906                 server_free(srv);
 907
 908                 return -1;
 909         }
 910
 911         if (plugins_load(srv)) {
 912                 log_error_write(srv, __FILE__, __LINE__, "s",
 913                                 "loading plugins finally failed");
 914
 915                 plugins_free(srv);
 916                 server_free(srv);
 917
 918                 return -1;
 919         }
 920
 921         /* open pid file BEFORE chroot */
 922         if (!buffer_string_is_empty(srv->srvconf.pid_file)) {
 923                 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))) {
 924                         struct stat st;
 925                         if (errno != EEXIST) {
 926                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
 927                                         "opening pid-file failed:", srv->srvconf.pid_file, strerror(errno));
 928                                 return -1;
 929                         }
 930
 931                         if (0 != stat(srv->srvconf.pid_file->ptr, &st)) {
 932                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
 933                                                 "stating existing pid-file failed:", srv->srvconf.pid_file, strerror(errno));
 934                         }
 935
 936                         if (!S_ISREG(st.st_mode)) {
 937                                 log_error_write(srv, __FILE__, __LINE__, "sb",
 938                                                 "pid-file exists and isn't regular file:", srv->srvconf.pid_file);
 939                                 return -1;
 940                         }
 941
 942                         if (-1 == (pid_fd = open(srv->srvconf.pid_file->ptr, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH))) {
 943                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
 944                                                 "opening pid-file failed:", srv->srvconf.pid_file, strerror(errno));
 945                                 return -1;
 946                         }
 947                 }
 948         }
 949
 950         if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
 951                 /* select limits itself
 952                  *
 953                  * as it is a hard limit and will lead to a segfault we add some safety
 954                  * */
 955                 srv->max_fds = FD_SETSIZE - 200;
 956         } else {
 957                 srv->max_fds = 4096;
 958         }
 959
 960         if (i_am_root) {
 961                 struct group *grp = NULL;
 962                 struct passwd *pwd = NULL;
 963                 int use_rlimit = 1;
 964
 965 #ifdef HAVE_VALGRIND_VALGRIND_H
 966                 if (RUNNING_ON_VALGRIND) use_rlimit = 0;
 967 #endif
 968
 969 #ifdef HAVE_GETRLIMIT
 970                 if (0 != getrlimit(RLIMIT_NOFILE, &rlim)) {
 971                         log_error_write(srv, __FILE__, __LINE__,
 972                                         "ss", "couldn't get 'max filedescriptors'",
 973                                         strerror(errno));
 974                         return -1;
 975                 }
 976
 977                 if (use_rlimit && srv->srvconf.max_fds) {
 978                         /* set rlimits */
 979
 980                         rlim.rlim_cur = srv->srvconf.max_fds;
 981                         rlim.rlim_max = srv->srvconf.max_fds;
 982
 983                         if (0 != setrlimit(RLIMIT_NOFILE, &rlim)) {
 984                                 log_error_write(srv, __FILE__, __LINE__,
 985                                                 "ss", "couldn't set 'max filedescriptors'",
 986                                                 strerror(errno));
 987                                 return -1;
 988                         }
 989                 }
 990
 991                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
 992                         srv->max_fds = rlim.rlim_cur < (rlim_t)FD_SETSIZE - 200 ? (int)rlim.rlim_cur : (int)FD_SETSIZE - 200;
 993                 } else {
 994                         srv->max_fds = rlim.rlim_cur;
 995                 }
 996
 997                 /* set core file rlimit, if enable_cores is set */
 998                 if (use_rlimit && srv->srvconf.enable_cores && getrlimit(RLIMIT_CORE, &rlim) == 0) {
 999                         rlim.rlim_cur = rlim.rlim_max;
1000                         setrlimit(RLIMIT_CORE, &rlim);
1001                 }
1002 #endif
1003                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
1004                         /* don't raise the limit above FD_SET_SIZE */
1005                         if (srv->max_fds > ((int)FD_SETSIZE) - 200) {
1006                                 log_error_write(srv, __FILE__, __LINE__, "sd",
1007                                                 "can't raise max filedescriptors above",  FD_SETSIZE - 200,
1008                                                 "if event-handler is 'select'. Use 'poll' or something else or reduce server.max-fds.");
1009                                 return -1;
1010                         }
1011                 }
1012
1013
1014 #ifdef HAVE_PWD_H
1015                 /* set user and group */
1016                 if (!buffer_string_is_empty(srv->srvconf.groupname)) {
1017                         if (NULL == (grp = getgrnam(srv->srvconf.groupname->ptr))) {
1018                                 log_error_write(srv, __FILE__, __LINE__, "sb",
1019                                         "can't find groupname", srv->srvconf.groupname);
1020                                 return -1;
1021                         }
1022                 }
1023
1024                 if (!buffer_string_is_empty(srv->srvconf.username)) {
1025                         if (NULL == (pwd = getpwnam(srv->srvconf.username->ptr))) {
1026                                 log_error_write(srv, __FILE__, __LINE__, "sb",
1027                                                 "can't find username", srv->srvconf.username);
1028                                 return -1;
1029                         }
1030
1031                         if (pwd->pw_uid == 0) {
1032                                 log_error_write(srv, __FILE__, __LINE__, "s",
1033                                                 "I will not set uid to 0\n");
1034                                 return -1;
1035                         }
1036
1037                         if (NULL == grp && NULL == (grp = getgrgid(pwd->pw_gid))) {
1038                                 log_error_write(srv, __FILE__, __LINE__, "sd",
1039                                         "can't find group id", pwd->pw_gid);
1040                                 return -1;
1041                         }
1042                 }
1043
1044                 if (NULL != grp) {
1045                         if (grp->gr_gid == 0) {
1046                                 log_error_write(srv, __FILE__, __LINE__, "s",
1047                                                 "I will not set gid to 0\n");
1048                                 return -1;
1049                         }
1050                 }
1051 #endif
1052                 /* we need root-perms for port < 1024 */
1053                 if (0 != network_init(srv)) {
1054                         plugins_free(srv);
1055                         server_free(srv);
1056
1057                         return -1;
1058                 }
1059 #ifdef HAVE_PWD_H
1060                 /*
1061                  * Change group before chroot, when we have access
1062                  * to /etc/group
1063                  * */
1064                 if (NULL != grp) {
1065                         if (-1 == setgid(grp->gr_gid)) {
1066                                 log_error_write(srv, __FILE__, __LINE__, "ss", "setgid failed: ", strerror(errno));
1067                                 return -1;
1068                         }
1069                         if (-1 == setgroups(0, NULL)) {
1070                                 log_error_write(srv, __FILE__, __LINE__, "ss", "setgroups failed: ", strerror(errno));
1071                                 return -1;
1072                         }
1073                         if (!buffer_string_is_empty(srv->srvconf.username)) {
1074                                 initgroups(srv->srvconf.username->ptr, grp->gr_gid);
1075                         }
1076                 }
1077 #endif
1078 #ifdef HAVE_CHROOT
1079                 if (!buffer_string_is_empty(srv->srvconf.changeroot)) {
1080                         tzset();
1081
1082                         if (-1 == chroot(srv->srvconf.changeroot->ptr)) {
1083                                 log_error_write(srv, __FILE__, __LINE__, "ss", "chroot failed: ", strerror(errno));
1084                                 return -1;
1085                         }
1086                         if (-1 == chdir("/")) {
1087                                 log_error_write(srv, __FILE__, __LINE__, "ss", "chdir failed: ", strerror(errno));
1088                                 return -1;
1089                         }
1090                 }
1091 #endif
1092 #ifdef HAVE_PWD_H
1093                 /* drop root privs */
1094                 if (NULL != pwd) {
1095                         if (-1 == setuid(pwd->pw_uid)) {
1096                                 log_error_write(srv, __FILE__, __LINE__, "ss", "setuid failed: ", strerror(errno));
1097                                 return -1;
1098                         }
1099                 }
1100 #endif
1101 #if defined(HAVE_SYS_PRCTL_H) && defined(PR_SET_DUMPABLE)
1102                 /**
1103                  * on IRIX 6.5.30 they have prctl() but no DUMPABLE
1104                  */
1105                 if (srv->srvconf.enable_cores) {
1106                         prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
1107                 }
1108 #endif
1109         } else {
1110
1111 #ifdef HAVE_GETRLIMIT
1112                 if (0 != getrlimit(RLIMIT_NOFILE, &rlim)) {
1113                         log_error_write(srv, __FILE__, __LINE__,
1114                                         "ss", "couldn't get 'max filedescriptors'",
1115                                         strerror(errno));
1116                         return -1;
1117                 }
1118
1119                 /**
1120                  * we are not root can can't increase the fd-limit above rlim_max, but we can reduce it
1121                  */
1122                 if (srv->srvconf.max_fds && srv->srvconf.max_fds <= rlim.rlim_max) {
1123                         /* set rlimits */
1124
1125                         rlim.rlim_cur = srv->srvconf.max_fds;
1126
1127                         if (0 != setrlimit(RLIMIT_NOFILE, &rlim)) {
1128                                 log_error_write(srv, __FILE__, __LINE__,
1129                                                 "ss", "couldn't set 'max filedescriptors'",
1130                                                 strerror(errno));
1131                                 return -1;
1132                         }
1133                 }
1134
1135                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
1136                         srv->max_fds = rlim.rlim_cur < (rlim_t)FD_SETSIZE - 200 ? (int)rlim.rlim_cur : (int)FD_SETSIZE - 200;
1137                 } else {
1138                         srv->max_fds = rlim.rlim_cur;
1139                 }
1140
1141                 /* set core file rlimit, if enable_cores is set */
1142                 if (srv->srvconf.enable_cores && getrlimit(RLIMIT_CORE, &rlim) == 0) {
1143                         rlim.rlim_cur = rlim.rlim_max;
1144                         setrlimit(RLIMIT_CORE, &rlim);
1145                 }
1146
1147 #endif
1148                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
1149                         /* don't raise the limit above FD_SET_SIZE */
1150                         if (srv->max_fds > ((int)FD_SETSIZE) - 200) {
1151                                 log_error_write(srv, __FILE__, __LINE__, "sd",
1152                                                 "can't raise max filedescriptors above",  FD_SETSIZE - 200,
1153                                                 "if event-handler is 'select'. Use 'poll' or something else or reduce server.max-fds.");
1154                                 return -1;
1155                         }
1156                 }
1157
1158                 if (0 != network_init(srv)) {
1159                         plugins_free(srv);
1160                         server_free(srv);
1161
1162                         return -1;
1163                 }
1164         }
1165
1166         /* set max-conns */
1167         if (srv->srvconf.max_conns > srv->max_fds/2) {
1168                 /* we can't have more connections than max-fds/2 */
1169                 log_error_write(srv, __FILE__, __LINE__, "sdd", "can't have more connections than fds/2: ", srv->srvconf.max_conns, srv->max_fds);
1170                 srv->max_conns = srv->max_fds/2;
1171         } else if (srv->srvconf.max_conns) {
1172                 /* otherwise respect the wishes of the user */
1173                 srv->max_conns = srv->srvconf.max_conns;
1174         } else {
1175                 /* or use the default: we really don't want to hit max-fds */
1176                 srv->max_conns = srv->max_fds/3;
1177         }
1178
1179         if (HANDLER_GO_ON != plugins_call_init(srv)) {
1180                 log_error_write(srv, __FILE__, __LINE__, "s", "Initialization of plugins failed. Going down.");
1181
1182                 plugins_free(srv);
1183                 network_close(srv);
1184                 server_free(srv);
1185
1186                 return -1;
1187         }
1188
1189 #ifdef HAVE_FORK
1190         /* network is up, let's deamonize ourself */
1191         if (srv->srvconf.dont_daemonize == 0) {
1192                 parent_pipe_fd = daemonize();
1193         }
1194 #endif
1195
1196
1197 #ifdef HAVE_SIGACTION
1198         memset(&act, 0, sizeof(act));
1199         act.sa_handler = SIG_IGN;
1200         sigaction(SIGPIPE, &act, NULL);
1201         sigaction(SIGUSR1, &act, NULL);
1202 # if defined(SA_SIGINFO)
1203         act.sa_sigaction = sigaction_handler;
1204         sigemptyset(&act.sa_mask);
1205         act.sa_flags = SA_SIGINFO;
1206 # else
1207         act.sa_handler = signal_handler;
1208         sigemptyset(&act.sa_mask);
1209         act.sa_flags = 0;
1210 # endif
1211         sigaction(SIGINT,  &act, NULL);
1212         sigaction(SIGTERM, &act, NULL);
1213         sigaction(SIGHUP,  &act, NULL);
1214         sigaction(SIGALRM, &act, NULL);
1215
1216         /* it should be safe to restart syscalls after SIGCHLD */
1217         act.sa_flags |= SA_RESTART | SA_NOCLDSTOP;
1218         sigaction(SIGCHLD, &act, NULL);
1219
1220 #elif defined(HAVE_SIGNAL)
1221         /* ignore the SIGPIPE from sendfile() */
1222         signal(SIGPIPE, SIG_IGN);
1223         signal(SIGUSR1, SIG_IGN);
1224         signal(SIGALRM, signal_handler);
1225         signal(SIGTERM, signal_handler);
1226         signal(SIGHUP,  signal_handler);
1227         signal(SIGCHLD,  signal_handler);
1228         signal(SIGINT,  signal_handler);
1229 #endif
1230
1231 #ifdef USE_ALARM
1232         signal(SIGALRM, signal_handler);
1233
1234         /* setup periodic timer (1 second) */
1235         if (setitimer(ITIMER_REAL, &interval, NULL)) {
1236                 log_error_write(srv, __FILE__, __LINE__, "s", "setting timer failed");
1237                 return -1;
1238         }
1239
1240         getitimer(ITIMER_REAL, &interval);
1241 #endif
1242
1243
1244         srv->gid = getgid();
1245         srv->uid = getuid();
1246
1247         /* write pid file */
1248         if (pid_fd != -1) {
1249                 buffer_copy_int(srv->tmp_buf, getpid());
1250                 buffer_append_string_len(srv->tmp_buf, CONST_STR_LEN("\n"));
1251                 if (-1 == write_all(pid_fd, CONST_BUF_LEN(srv->tmp_buf))) {
1252                         log_error_write(srv, __FILE__, __LINE__, "ss", "Couldn't write pid file:", strerror(errno));
1253                         close(pid_fd);
1254                         return -1;
1255                 }
1256         }
1257
1258         /* Close stderr ASAP in the child process to make sure that nothing
1259          * is being written to that fd which may not be valid anymore. */
1260         if (!srv->srvconf.preflight_check && -1 == log_error_open(srv)) {
1261                 log_error_write(srv, __FILE__, __LINE__, "s", "Opening errorlog failed. Going down.");
1262
1263                 plugins_free(srv);
1264                 network_close(srv);
1265                 server_free(srv);
1266                 return -1;
1267         }
1268
1269         if (HANDLER_GO_ON != plugins_call_set_defaults(srv)) {
1270                 log_error_write(srv, __FILE__, __LINE__, "s", "Configuration of plugins failed. Going down.");
1271
1272                 plugins_free(srv);
1273                 network_close(srv);
1274                 server_free(srv);
1275
1276                 return -1;
1277         }
1278
1279         /* settings might be enabled during module config set defaults */
1280         srv->config_storage[0]->high_precision_timestamps = srv->srvconf.high_precision_timestamps;
1281
1282         /* dump unused config-keys */
1283         for (i = 0; i < srv->config_context->used; i++) {
1284                 array *config = ((data_config *)srv->config_context->data[i])->value;
1285                 size_t j;
1286
1287                 for (j = 0; config && j < config->used; j++) {
1288                         data_unset *du = config->data[j];
1289
1290                         /* all var.* is known as user defined variable */
1291                         if (strncmp(du->key->ptr, "var.", sizeof("var.") - 1) == 0) {
1292                                 continue;
1293                         }
1294
1295                         if (NULL == array_get_element(srv->config_touched, du->key->ptr)) {
1296                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
1297                                                 "WARNING: unknown config-key:",
1298                                                 du->key,
1299                                                 "(ignored)");
1300                         }
1301                 }
1302         }
1303
1304         if (srv->config_unsupported) {
1305                 log_error_write(srv, __FILE__, __LINE__, "s",
1306                                 "Configuration contains unsupported keys. Going down.");
1307         }
1308
1309         if (srv->config_deprecated) {
1310                 log_error_write(srv, __FILE__, __LINE__, "s",
1311                                 "Configuration contains deprecated keys. Going down.");
1312         }
1313
1314         if (srv->config_unsupported || srv->config_deprecated) {
1315                 plugins_free(srv);
1316                 network_close(srv);
1317                 server_free(srv);
1318
1319                 return -1;
1320         }
1321
1322         if (srv->srvconf.preflight_check) {
1323                 /*printf("Preflight OK");*//*(stdout reopened to /dev/null)*/
1324                 plugins_free(srv);
1325                 network_close(srv);
1326                 server_free(srv);
1327
1328                 exit(0);
1329         }
1330
1331
1332 #ifdef HAVE_FORK
1333         /**
1334          * notify daemonize-grandparent of successful startup
1335          * do this before any further forking is done (workers)
1336          */
1337         if (srv->srvconf.dont_daemonize == 0) {
1338                 if (0 > write(parent_pipe_fd, "", 1)) return -1;
1339                 close(parent_pipe_fd);
1340         }
1341
1342         if (idle_limit && srv->srvconf.max_worker) {
1343                 srv->srvconf.max_worker = 0;
1344                 log_error_write(srv, __FILE__, __LINE__, "s",
1345                                 "server idle time limit command line option disables server.max-worker config file option.");
1346         }
1347
1348         /* start watcher and workers */
1349         num_childs = srv->srvconf.max_worker;
1350         if (num_childs > 0) {
1351                 int child = 0;
1352                 while (!child && !srv_shutdown && !graceful_shutdown) {
1353                         if (num_childs > 0) {
1354                                 switch (fork()) {
1355                                 case -1:
1356                                         return -1;
1357                                 case 0:
1358                                         child = 1;
1359                                         break;
1360                                 default:
1361                                         num_childs--;
1362                                         break;
1363                                 }
1364                         } else {
1365                                 int status;
1366
1367                                 if (-1 != wait(&status)) {
1368                                         /**
1369                                          * one of our workers went away
1370                                          */
1371                                         num_childs++;
1372                                 } else {
1373                                         switch (errno) {
1374                                         case EINTR:
1375                                                 /**
1376                                                  * if we receive a SIGHUP we have to close our logs ourself as we don't
1377                                                  * have the mainloop who can help us here
1378                                                  */
1379                                                 if (handle_sig_hup) {
1380                                                         handle_sig_hup = 0;
1381
1382                                                         log_error_cycle(srv);
1383
1384                                                         /**
1385                                                          * forward to all procs in the process-group
1386                                                          *
1387                                                          * we also send it ourself
1388                                                          */
1389                                                         if (!forwarded_sig_hup && 0 != srv->srvconf.max_worker) {
1390                                                                 forwarded_sig_hup = 1;
1391                                                                 kill(0, SIGHUP);
1392                                                         }
1393                                                 }
1394                                                 break;
1395                                         default:
1396                                                 break;
1397                                         }
1398                                 }
1399                         }
1400                 }
1401
1402                 /**
1403                  * for the parent this is the exit-point
1404                  */
1405                 if (!child) {
1406                         /**
1407                          * kill all children too
1408                          */
1409                         if (graceful_shutdown) {
1410                                 kill(0, SIGINT);
1411                         } else if (srv_shutdown) {
1412                                 kill(0, SIGTERM);
1413                         }
1414
1415                         remove_pid_file(srv, &pid_fd);
1416                         log_error_close(srv);
1417                         network_close(srv);
1418                         connections_free(srv);
1419                         plugins_free(srv);
1420                         server_free(srv);
1421                         return 0;
1422                 }
1423
1424                 /**
1425                  * make sure workers do not muck with pid-file
1426                  */
1427                 if (0 <= pid_fd) {
1428                         close(pid_fd);
1429                         pid_fd = -1;
1430                 }
1431                 buffer_reset(srv->srvconf.pid_file);
1432
1433                 li_rand_reseed();
1434         }
1435 #endif
1436
1437         if (NULL == (srv->ev = fdevent_init(srv, srv->max_fds + 1, srv->event_handler))) {
1438                 log_error_write(srv, __FILE__, __LINE__,
1439                                 "s", "fdevent_init failed");
1440                 return -1;
1441         }
1442
1443         /* libev backend overwrites our SIGCHLD handler and calls waitpid on SIGCHLD; we want our own SIGCHLD handling. */
1444 #ifdef HAVE_SIGACTION
1445         sigaction(SIGCHLD, &act, NULL);
1446 #elif defined(HAVE_SIGNAL)
1447         signal(SIGCHLD,  signal_handler);
1448 #endif
1449
1450         /*
1451          * kqueue() is called here, select resets its internals,
1452          * all server sockets get their handlers
1453          *
1454          * */
1455         if (0 != network_register_fdevents(srv)) {
1456                 plugins_free(srv);
1457                 network_close(srv);
1458                 server_free(srv);
1459
1460                 return -1;
1461         }
1462
1463         /* might fail if user is using fam (not gamin) and famd isn't running */
1464         if (NULL == (srv->stat_cache = stat_cache_init())) {
1465                 log_error_write(srv, __FILE__, __LINE__, "s",
1466                         "stat-cache could not be setup, dieing.");
1467                 return -1;
1468         }
1469
1470 #ifdef HAVE_FAM_H
1471         /* setup FAM */
1472         if (srv->srvconf.stat_cache_engine == STAT_CACHE_ENGINE_FAM) {
1473                 if (0 != FAMOpen2(&srv->stat_cache->fam, "lighttpd")) {
1474                         log_error_write(srv, __FILE__, __LINE__, "s",
1475                                          "could not open a fam connection, dieing.");
1476                         return -1;
1477                 }
1478 #ifdef HAVE_FAMNOEXISTS
1479                 FAMNoExists(&srv->stat_cache->fam);
1480 #endif
1481
1482                 fd_close_on_exec(FAMCONNECTION_GETFD(&srv->stat_cache->fam));
1483                 fdevent_register(srv->ev, FAMCONNECTION_GETFD(&srv->stat_cache->fam), stat_cache_handle_fdevent, NULL);
1484                 fdevent_event_set(srv->ev, &(srv->stat_cache->fam_fcce_ndx), FAMCONNECTION_GETFD(&srv->stat_cache->fam), FDEVENT_IN);
1485         }
1486 #endif
1487
1488
1489         /* get the current number of FDs */
1490         srv->cur_fds = open("/dev/null", O_RDONLY);
1491         close(srv->cur_fds);
1492
1493         for (i = 0; i < srv->srv_sockets.used; i++) {
1494                 server_socket *srv_socket = srv->srv_sockets.ptr[i];
1495                 if (srv->sockets_disabled) continue; /* lighttpd -1 (one-shot mode) */
1496                 if (-1 == fdevent_fcntl_set_nb_cloexec_sock(srv->ev, srv_socket->fd)) {
1497                         log_error_write(srv, __FILE__, __LINE__, "ss", "fcntl failed:", strerror(errno));
1498                         return -1;
1499                 }
1500         }
1501
1502         if (oneshot_fd && server_oneshot_init(srv, oneshot_fd)) {
1503                 oneshot_fd = -1;
1504         }
1505
1506         /* main-loop */
1507         while (!srv_shutdown) {
1508                 int n;
1509                 size_t ndx;
1510                 time_t min_ts;
1511
1512                 if (handle_sig_hup) {
1513                         handler_t r;
1514
1515                         /* reset notification */
1516                         handle_sig_hup = 0;
1517
1518
1519                         /* cycle logfiles */
1520
1521                         switch(r = plugins_call_handle_sighup(srv)) {
1522                         case HANDLER_GO_ON:
1523                                 break;
1524                         default:
1525                                 log_error_write(srv, __FILE__, __LINE__, "sd", "sighup-handler return with an error", r);
1526                                 break;
1527                         }
1528
1529                         if (-1 == log_error_cycle(srv)) {
1530                                 log_error_write(srv, __FILE__, __LINE__, "s", "cycling errorlog failed, dying");
1531
1532                                 return -1;
1533                         } else {
1534 #ifdef HAVE_SIGACTION
1535                                 log_error_write(srv, __FILE__, __LINE__, "sdsd",
1536                                         "logfiles cycled UID =",
1537                                         last_sighup_info.si_uid,
1538                                         "PID =",
1539                                         last_sighup_info.si_pid);
1540 #else
1541                                 log_error_write(srv, __FILE__, __LINE__, "s",
1542                                         "logfiles cycled");
1543 #endif
1544                         }
1545                 }
1546
1547                 if (handle_sig_alarm) {
1548                         /* a new second */
1549
1550 #ifdef USE_ALARM
1551                         /* reset notification */
1552                         handle_sig_alarm = 0;
1553 #endif
1554
1555                         /* get current time */
1556                         min_ts = time(NULL);
1557
1558                         if (min_ts != srv->cur_ts) {
1559 #ifdef DEBUG_CONNECTION_STATES
1560                                 int cs = 0;
1561 #endif
1562                                 connections *conns = srv->conns;
1563                                 handler_t r;
1564
1565                                 switch(r = plugins_call_handle_trigger(srv)) {
1566                                 case HANDLER_GO_ON:
1567                                         break;
1568                                 case HANDLER_ERROR:
1569                                         log_error_write(srv, __FILE__, __LINE__, "s", "one of the triggers failed");
1570                                         break;
1571                                 default:
1572                                         log_error_write(srv, __FILE__, __LINE__, "d", r);
1573                                         break;
1574                                 }
1575
1576                                 /* trigger waitpid */
1577                                 srv->cur_ts = min_ts;
1578
1579                                 /* check idle time limit, if enabled */
1580                                 if (idle_limit && idle_limit < min_ts - last_active_ts && !graceful_shutdown) {
1581                                         log_error_write(srv, __FILE__, __LINE__, "sDs", "[note] idle timeout", (int)idle_limit,
1582                                                         "s exceeded, initiating graceful shutdown");
1583                                         graceful_shutdown = 2; /* value 2 indicates idle timeout */
1584                                 }
1585
1586                                 /* cleanup stat-cache */
1587                                 stat_cache_trigger_cleanup(srv);
1588                                 /**
1589                                  * check all connections for timeouts
1590                                  *
1591                                  */
1592                                 for (ndx = 0; ndx < conns->used; ndx++) {
1593                                         connection * const con = conns->ptr[ndx];
1594                                         const int waitevents = fdevent_event_get_interest(srv->ev, con->fd);
1595                                         int changed = 0;
1596                                         int t_diff;
1597
1598                                         if (con->state == CON_STATE_CLOSE) {
1599                                                 if (srv->cur_ts - con->close_timeout_ts > HTTP_LINGER_TIMEOUT) {
1600                                                         changed = 1;
1601                                                 }
1602                                         } else if (waitevents & FDEVENT_IN) {
1603                                                 if (con->request_count == 1 || con->state != CON_STATE_READ) { /* e.g. CON_STATE_READ_POST || CON_STATE_WRITE */
1604                                                         if (srv->cur_ts - con->read_idle_ts > con->conf.max_read_idle) {
1605                                                                 /* time - out */
1606                                                                 if (con->conf.log_request_handling) {
1607                                                                         log_error_write(srv, __FILE__, __LINE__, "sd",
1608                                                                                 "connection closed - read timeout:", con->fd);
1609                                                                 }
1610
1611                                                                 connection_set_state(srv, con, CON_STATE_ERROR);
1612                                                                 changed = 1;
1613                                                         }
1614                                                 } else {
1615                                                         if (srv->cur_ts - con->read_idle_ts > con->keep_alive_idle) {
1616                                                                 /* time - out */
1617                                                                 if (con->conf.log_request_handling) {
1618                                                                         log_error_write(srv, __FILE__, __LINE__, "sd",
1619                                                                                 "connection closed - keep-alive timeout:", con->fd);
1620                                                                 }
1621
1622                                                                 connection_set_state(srv, con, CON_STATE_ERROR);
1623                                                                 changed = 1;
1624                                                         }
1625                                                 }
1626                                         }
1627
1628                                         /* max_write_idle timeout currently functions as backend timeout,
1629                                          * too, after response has been started.
1630                                          * future: have separate backend timeout, and then change this
1631                                          * to check for write interest before checking for timeout */
1632                                         /*if (waitevents & FDEVENT_OUT)*/
1633                                         if ((con->state == CON_STATE_WRITE) &&
1634                                             (con->write_request_ts != 0)) {
1635 #if 0
1636                                                 if (srv->cur_ts - con->write_request_ts > 60) {
1637                                                         log_error_write(srv, __FILE__, __LINE__, "sdd",
1638                                                                         "connection closed - pre-write-request-timeout:", con->fd, srv->cur_ts - con->write_request_ts);
1639                                                 }
1640 #endif
1641
1642                                                 if (srv->cur_ts - con->write_request_ts > con->conf.max_write_idle) {
1643                                                         /* time - out */
1644                                                         if (con->conf.log_timeouts) {
1645                                                                 log_error_write(srv, __FILE__, __LINE__, "sbsbsosds",
1646                                                                         "NOTE: a request from",
1647                                                                         con->dst_addr_buf,
1648                                                                         "for",
1649                                                                         con->request.uri,
1650                                                                         "timed out after writing",
1651                                                                         con->bytes_written,
1652                                                                         "bytes. We waited",
1653                                                                         (int)con->conf.max_write_idle,
1654                                                                         "seconds. If this a problem increase server.max-write-idle");
1655                                                         }
1656                                                         connection_set_state(srv, con, CON_STATE_ERROR);
1657                                                         changed = 1;
1658                                                 }
1659                                         }
1660
1661                                         /* we don't like div by zero */
1662                                         if (0 == (t_diff = srv->cur_ts - con->connection_start)) t_diff = 1;
1663
1664                                         if (con->traffic_limit_reached &&
1665                                             (con->conf.kbytes_per_second == 0 ||
1666                                              ((con->bytes_written / t_diff) < con->conf.kbytes_per_second * 1024))) {
1667                                                 /* enable connection again */
1668                                                 con->traffic_limit_reached = 0;
1669
1670                                                 changed = 1;
1671                                         }
1672
1673                                         if (changed) {
1674                                                 connection_state_machine(srv, con);
1675                                         }
1676                                         con->bytes_written_cur_second = 0;
1677                                         *(con->conf.global_bytes_per_second_cnt_ptr) = 0;
1678
1679 #if DEBUG_CONNECTION_STATES
1680                                         if (cs == 0) {
1681                                                 fprintf(stderr, "connection-state: ");
1682                                                 cs = 1;
1683                                         }
1684
1685                                         fprintf(stderr, "c[%d,%d]: %s ",
1686                                                 con->fd,
1687                                                 con->fcgi.fd,
1688                                                 connection_get_state(con->state));
1689 #endif
1690                                 }
1691
1692 #ifdef DEBUG_CONNECTION_STATES
1693                                 if (cs == 1) fprintf(stderr, "\n");
1694 #endif
1695                         }
1696                 }
1697
1698                 if (srv->sockets_disabled) {
1699                         /* our server sockets are disabled, why ? */
1700
1701                         if ((srv->cur_fds + srv->want_fds < srv->max_fds * 8 / 10) && /* we have enough unused fds */
1702                             (srv->conns->used <= srv->max_conns * 9 / 10) &&
1703                             (0 == graceful_shutdown)) {
1704                                 for (i = 0; i < srv->srv_sockets.used; i++) {
1705                                         server_socket *srv_socket = srv->srv_sockets.ptr[i];
1706                                         fdevent_event_set(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd, FDEVENT_IN);
1707                                 }
1708
1709                                 log_error_write(srv, __FILE__, __LINE__, "s", "[note] sockets enabled again");
1710
1711                                 srv->sockets_disabled = 0;
1712                         }
1713                 } else {
1714                         if ((srv->cur_fds + srv->want_fds > srv->max_fds * 9 / 10) || /* out of fds */
1715                             (srv->conns->used >= srv->max_conns) || /* out of connections */
1716                             (graceful_shutdown)) { /* graceful_shutdown */
1717
1718                                 /* disable server-fds */
1719
1720                                 for (i = 0; i < srv->srv_sockets.used; i++) {
1721                                         server_socket *srv_socket = srv->srv_sockets.ptr[i];
1722
1723                                         if (graceful_shutdown) {
1724                                                 /* we don't want this socket anymore,
1725                                                  *
1726                                                  * closing it right away will make it possible for
1727                                                  * the next lighttpd to take over (graceful restart)
1728                                                  *  */
1729
1730                                                 fdevent_event_del(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd);
1731                                                 fdevent_unregister(srv->ev, srv_socket->fd);
1732                                                 close(srv_socket->fd);
1733                                                 srv_socket->fd = -1;
1734
1735                                                 /* network_close() will cleanup after us */
1736                                         } else {
1737                                                 fdevent_event_set(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd, 0);
1738                                         }
1739                                 }
1740
1741                                 if (graceful_shutdown) {
1742                                         remove_pid_file(srv, &pid_fd);
1743                                         log_error_write(srv, __FILE__, __LINE__, "s", "[note] graceful shutdown started");
1744                                 } else if (srv->conns->used >= srv->max_conns) {
1745                                         log_error_write(srv, __FILE__, __LINE__, "s", "[note] sockets disabled, connection limit reached");
1746                                 } else {
1747                                         log_error_write(srv, __FILE__, __LINE__, "s", "[note] sockets disabled, out-of-fds");
1748                                 }
1749
1750                                 srv->sockets_disabled = 1;
1751                         }
1752                 }
1753
1754                 if (graceful_shutdown && srv->conns->used == 0) {
1755                         /* we are in graceful shutdown phase and all connections are closed
1756                          * we are ready to terminate without harming anyone */
1757                         srv_shutdown = 1;
1758                         break;
1759                 }
1760
1761                 /* we still have some fds to share */
1762                 if (srv->want_fds) {
1763                         /* check the fdwaitqueue for waiting fds */
1764                         int free_fds = srv->max_fds - srv->cur_fds - 16;
1765                         connection *con;
1766
1767                         for (; free_fds > 0 && NULL != (con = fdwaitqueue_unshift(srv, srv->fdwaitqueue)); free_fds--) {
1768                                 connection_state_machine(srv, con);
1769
1770                                 srv->want_fds--;
1771                         }
1772                 }
1773
1774                 if ((n = fdevent_poll(srv->ev, 1000)) > 0) {
1775                         /* n is the number of events */
1776                         int revents;
1777                         int fd_ndx;
1778                         last_active_ts = srv->cur_ts;
1779                         fd_ndx = -1;
1780                         do {
1781                                 fdevent_handler handler;
1782                                 void *context;
1783
1784                                 fd_ndx  = fdevent_event_next_fdndx (srv->ev, fd_ndx);
1785                                 if (-1 == fd_ndx) break; /* not all fdevent handlers know how many fds got an event */
1786
1787                                 revents = fdevent_event_get_revent (srv->ev, fd_ndx);
1788                                 fd      = fdevent_event_get_fd     (srv->ev, fd_ndx);
1789                                 handler = fdevent_get_handler(srv->ev, fd);
1790                                 context = fdevent_get_context(srv->ev, fd);
1791                                 if (NULL != handler) {
1792                                         (*handler)(srv, context, revents);
1793                                 }
1794                         } while (--n > 0);
1795                         fdevent_sched_run(srv, srv->ev);
1796                 } else if (n < 0 && errno != EINTR) {
1797                         log_error_write(srv, __FILE__, __LINE__, "ss",
1798                                         "fdevent_poll failed:",
1799                                         strerror(errno));
1800                 }
1801
1802                 for (ndx = 0; ndx < srv->joblist->used; ndx++) {
1803                         connection *con = srv->joblist->ptr[ndx];
1804                         connection_state_machine(srv, con);
1805                         con->in_joblist = 0;
1806                 }
1807
1808                 srv->joblist->used = 0;
1809         }
1810
1811         if (0 == graceful_shutdown) {
1812                 remove_pid_file(srv, &pid_fd);
1813         }
1814
1815         if (2 == graceful_shutdown) { /* value 2 indicates idle timeout */
1816                 log_error_write(srv, __FILE__, __LINE__, "s",
1817                                 "server stopped after idle timeout");
1818         } else {
1819 #ifdef HAVE_SIGACTION
1820                 log_error_write(srv, __FILE__, __LINE__, "sdsd",
1821                                 "server stopped by UID =",
1822                                 last_sigterm_info.si_uid,
1823                                 "PID =",
1824                                 last_sigterm_info.si_pid);
1825 #else
1826                 log_error_write(srv, __FILE__, __LINE__, "s",
1827                                 "server stopped");
1828 #endif
1829         }
1830
1831         /* clean-up */
1832         log_error_close(srv);
1833         network_close(srv);
1834         connections_free(srv);
1835         plugins_free(srv);
1836         server_free(srv);
1837
1838         return 0;
1839 }