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 "response.h"
   9 #include "request.h"
  10 #include "chunk.h"
  11 #include "http_chunk.h"
  12 #include "fdevent.h"
  13 #include "connections.h"
  14 #include "stat_cache.h"
  15 #include "plugin.h"
  16 #include "joblist.h"
  17 #include "network_backends.h"
  18 #include "version.h"
  19
  20 #include <sys/types.h>
  21 #include <sys/time.h>
  22 #include <sys/stat.h>
  23
  24 #include <string.h>
  25 #include <errno.h>
  26 #include <fcntl.h>
  27 #include <unistd.h>
  28 #include <stdlib.h>
  29 #include <time.h>
  30 #include <signal.h>
  31 #include <assert.h>
  32 #include <locale.h>
  33
  34 #include <stdio.h>
  35
  36 #ifdef HAVE_GETOPT_H
  37 # include <getopt.h>
  38 #endif
  39
  40 #ifdef HAVE_VALGRIND_VALGRIND_H
  41 # include <valgrind/valgrind.h>
  42 #endif
  43
  44 #ifdef HAVE_SYS_WAIT_H
  45 # include <sys/wait.h>
  46 #endif
  47
  48 #ifdef HAVE_PWD_H
  49 # include <grp.h>
  50 # include <pwd.h>
  51 #endif
  52
  53 #ifdef HAVE_SYS_RESOURCE_H
  54 # include <sys/resource.h>
  55 #endif
  56
  57 #ifdef HAVE_SYS_PRCTL_H
  58 # include <sys/prctl.h>
  59 #endif
  60
  61 #ifdef USE_OPENSSL
  62 # include <openssl/err.h>
  63 #endif
  64
  65 #ifndef __sgi
  66 /* IRIX doesn't like the alarm based time() optimization */
  67 /* #define USE_ALARM */
  68 #endif
  69
  70 #ifdef HAVE_GETUID
  71 # ifndef HAVE_ISSETUGID
  72
  73 static int l_issetugid(void) {
  74         return (geteuid() != getuid() || getegid() != getgid());
  75 }
  76
  77 #  define issetugid l_issetugid
  78 # endif
  79 #endif
  80
  81 static int oneshot_fd = 0;
  82 static volatile sig_atomic_t srv_shutdown = 0;
  83 static volatile sig_atomic_t graceful_shutdown = 0;
  84 static volatile sig_atomic_t handle_sig_alarm = 1;
  85 static volatile sig_atomic_t handle_sig_hup = 0;
  86 static volatile sig_atomic_t forwarded_sig_hup = 0;
  87
  88 #if defined(HAVE_SIGACTION) && defined(SA_SIGINFO)
  89 static volatile siginfo_t last_sigterm_info;
  90 static volatile siginfo_t last_sighup_info;
  91
  92 static void sigaction_handler(int sig, siginfo_t *si, void *context) {
  93         static siginfo_t empty_siginfo;
  94         UNUSED(context);
  95
  96         if (!si) si = &empty_siginfo;
  97
  98         switch (sig) {
  99         case SIGTERM:
 100                 srv_shutdown = 1;
 101                 last_sigterm_info = *si;
 102                 break;
 103         case SIGINT:
 104                 if (graceful_shutdown) {
 105                         srv_shutdown = 1;
 106                 } else {
 107                         graceful_shutdown = 1;
 108                 }
 109                 last_sigterm_info = *si;
 110
 111                 break;
 112         case SIGALRM:
 113                 handle_sig_alarm = 1;
 114                 break;
 115         case SIGHUP:
 116                 /**
 117                  * we send the SIGHUP to all procs in the process-group
 118                  * this includes ourself
 119                  *
 120                  * make sure we only send it once and don't create a
 121                  * infinite loop
 122                  */
 123                 if (!forwarded_sig_hup) {
 124                         handle_sig_hup = 1;
 125                         last_sighup_info = *si;
 126                 } else {
 127                         forwarded_sig_hup = 0;
 128                 }
 129                 break;
 130         case SIGCHLD:
 131                 break;
 132         }
 133 }
 134 #elif defined(HAVE_SIGNAL) || defined(HAVE_SIGACTION)
 135 static void signal_handler(int sig) {
 136         switch (sig) {
 137         case SIGTERM: srv_shutdown = 1; break;
 138         case SIGINT:
 139              if (graceful_shutdown) srv_shutdown = 1;
 140              else graceful_shutdown = 1;
 141
 142              break;
 143         case SIGALRM: handle_sig_alarm = 1; break;
 144         case SIGHUP:  handle_sig_hup = 1; break;
 145         case SIGCHLD:  break;
 146         }
 147 }
 148 #endif
 149
 150 #ifdef HAVE_FORK
 151 static int daemonize(void) {
 152         int pipefd[2];
 153         pid_t pid;
 154 #ifdef SIGTTOU
 155         signal(SIGTTOU, SIG_IGN);
 156 #endif
 157 #ifdef SIGTTIN
 158         signal(SIGTTIN, SIG_IGN);
 159 #endif
 160 #ifdef SIGTSTP
 161         signal(SIGTSTP, SIG_IGN);
 162 #endif
 163
 164         if (pipe(pipefd) < 0) exit(-1);
 165
 166         if (0 > (pid = fork())) exit(-1);
 167
 168         if (0 < pid) {
 169                 char buf;
 170                 ssize_t bytes;
 171
 172                 close(pipefd[1]);
 173                 /* parent waits for grandchild to be ready */
 174                 do {
 175                         bytes = read(pipefd[0], &buf, sizeof(buf));
 176                 } while (bytes < 0 && EINTR == errno);
 177                 close(pipefd[0]);
 178
 179                 if (bytes <= 0) {
 180                         /* closed fd (without writing) == failure in grandchild */
 181                         fputs("daemonized server failed to start; check error log for details\n", stderr);
 182                         exit(-1);
 183                 }
 184
 185                 exit(0);
 186         }
 187
 188         close(pipefd[0]);
 189
 190         if (-1 == setsid()) exit(0);
 191
 192         signal(SIGHUP, SIG_IGN);
 193
 194         if (0 != fork()) exit(0);
 195
 196         if (0 != chdir("/")) exit(0);
 197
 198         fd_close_on_exec(pipefd[1]);
 199         return pipefd[1];
 200 }
 201 #endif
 202
 203 static server *server_init(void) {
 204         int i;
 205         FILE *frandom = NULL;
 206
 207         server *srv = calloc(1, sizeof(*srv));
 208         force_assert(srv);
 209 #define CLEAN(x) \
 210         srv->x = buffer_init();
 211
 212         CLEAN(response_header);
 213         CLEAN(parse_full_path);
 214         CLEAN(ts_debug_str);
 215         CLEAN(ts_date_str);
 216         CLEAN(errorlog_buf);
 217         CLEAN(response_range);
 218         CLEAN(tmp_buf);
 219         srv->empty_string = buffer_init_string("");
 220         CLEAN(cond_check_buf);
 221
 222         CLEAN(srvconf.errorlog_file);
 223         CLEAN(srvconf.breakagelog_file);
 224         CLEAN(srvconf.groupname);
 225         CLEAN(srvconf.username);
 226         CLEAN(srvconf.changeroot);
 227         CLEAN(srvconf.bindhost);
 228         CLEAN(srvconf.event_handler);
 229         CLEAN(srvconf.pid_file);
 230
 231         CLEAN(tmp_chunk_len);
 232 #undef CLEAN
 233
 234 #define CLEAN(x) \
 235         srv->x = array_init();
 236
 237         CLEAN(config_context);
 238         CLEAN(config_touched);
 239         CLEAN(status);
 240 #undef CLEAN
 241
 242         for (i = 0; i < FILE_CACHE_MAX; i++) {
 243                 srv->mtime_cache[i].mtime = (time_t)-1;
 244                 srv->mtime_cache[i].str = buffer_init();
 245         }
 246
 247         if ((NULL != (frandom = fopen("/dev/urandom", "rb")) || NULL != (frandom = fopen("/dev/random", "rb")))
 248                     && 1 == fread(srv->entropy, sizeof(srv->entropy), 1, frandom)) {
 249                 unsigned int e;
 250                 memcpy(&e, srv->entropy, sizeof(e) < sizeof(srv->entropy) ? sizeof(e) : sizeof(srv->entropy));
 251                 srand(e);
 252                 srv->is_real_entropy = 1;
 253         } else {
 254                 unsigned int j;
 255                 srand(time(NULL) ^ getpid());
 256                 srv->is_real_entropy = 0;
 257                 for (j = 0; j < sizeof(srv->entropy); j++)
 258                         srv->entropy[j] = rand();
 259         }
 260         if (frandom) fclose(frandom);
 261
 262         srv->cur_ts = time(NULL);
 263         srv->startup_ts = srv->cur_ts;
 264
 265         srv->conns = calloc(1, sizeof(*srv->conns));
 266         force_assert(srv->conns);
 267
 268         srv->joblist = calloc(1, sizeof(*srv->joblist));
 269         force_assert(srv->joblist);
 270
 271         srv->fdwaitqueue = calloc(1, sizeof(*srv->fdwaitqueue));
 272         force_assert(srv->fdwaitqueue);
 273
 274         srv->srvconf.modules = array_init();
 275         srv->srvconf.modules_dir = buffer_init_string(LIBRARY_DIR);
 276         srv->srvconf.network_backend = buffer_init();
 277         srv->srvconf.upload_tempdirs = array_init();
 278         srv->srvconf.reject_expect_100_with_417 = 1;
 279         srv->srvconf.xattr_name = buffer_init_string("Content-Type");
 280
 281         /* use syslog */
 282         srv->errorlog_fd = STDERR_FILENO;
 283         srv->errorlog_mode = ERRORLOG_FD;
 284
 285         srv->split_vals = array_init();
 286
 287         return srv;
 288 }
 289
 290 static void server_free(server *srv) {
 291         size_t i;
 292
 293         for (i = 0; i < FILE_CACHE_MAX; i++) {
 294                 buffer_free(srv->mtime_cache[i].str);
 295         }
 296
 297         if (oneshot_fd > 0) {
 298                 close(oneshot_fd);
 299         }
 300
 301 #define CLEAN(x) \
 302         buffer_free(srv->x);
 303
 304         CLEAN(response_header);
 305         CLEAN(parse_full_path);
 306         CLEAN(ts_debug_str);
 307         CLEAN(ts_date_str);
 308         CLEAN(errorlog_buf);
 309         CLEAN(response_range);
 310         CLEAN(tmp_buf);
 311         CLEAN(empty_string);
 312         CLEAN(cond_check_buf);
 313
 314         CLEAN(srvconf.errorlog_file);
 315         CLEAN(srvconf.breakagelog_file);
 316         CLEAN(srvconf.groupname);
 317         CLEAN(srvconf.username);
 318         CLEAN(srvconf.changeroot);
 319         CLEAN(srvconf.bindhost);
 320         CLEAN(srvconf.event_handler);
 321         CLEAN(srvconf.pid_file);
 322         CLEAN(srvconf.modules_dir);
 323         CLEAN(srvconf.network_backend);
 324         CLEAN(srvconf.xattr_name);
 325
 326         CLEAN(tmp_chunk_len);
 327 #undef CLEAN
 328
 329 #if 0
 330         fdevent_unregister(srv->ev, srv->fd);
 331 #endif
 332         fdevent_free(srv->ev);
 333
 334         free(srv->conns);
 335
 336         if (srv->config_storage) {
 337                 for (i = 0; i < srv->config_context->used; i++) {
 338                         specific_config *s = srv->config_storage[i];
 339
 340                         if (!s) continue;
 341
 342                         buffer_free(s->document_root);
 343                         buffer_free(s->server_name);
 344                         buffer_free(s->server_tag);
 345                         buffer_free(s->ssl_pemfile);
 346                         buffer_free(s->ssl_ca_file);
 347                         buffer_free(s->ssl_cipher_list);
 348                         buffer_free(s->ssl_dh_file);
 349                         buffer_free(s->ssl_ec_curve);
 350                         buffer_free(s->error_handler);
 351                         buffer_free(s->error_handler_404);
 352                         buffer_free(s->errorfile_prefix);
 353                         array_free(s->mimetypes);
 354                         buffer_free(s->ssl_verifyclient_username);
 355 #ifdef USE_OPENSSL
 356                         SSL_CTX_free(s->ssl_ctx);
 357                         EVP_PKEY_free(s->ssl_pemfile_pkey);
 358                         X509_free(s->ssl_pemfile_x509);
 359                         if (NULL != s->ssl_ca_file_cert_names) sk_X509_NAME_pop_free(s->ssl_ca_file_cert_names, X509_NAME_free);
 360 #endif
 361                         free(s);
 362                 }
 363                 free(srv->config_storage);
 364                 srv->config_storage = NULL;
 365         }
 366
 367 #define CLEAN(x) \
 368         array_free(srv->x);
 369
 370         CLEAN(config_context);
 371         CLEAN(config_touched);
 372         CLEAN(status);
 373         CLEAN(srvconf.upload_tempdirs);
 374 #undef CLEAN
 375
 376         joblist_free(srv, srv->joblist);
 377         fdwaitqueue_free(srv, srv->fdwaitqueue);
 378
 379         if (srv->stat_cache) {
 380                 stat_cache_free(srv->stat_cache);
 381         }
 382
 383         array_free(srv->srvconf.modules);
 384         array_free(srv->split_vals);
 385
 386 #ifdef USE_OPENSSL
 387         if (srv->ssl_is_init) {
 388                 CRYPTO_cleanup_all_ex_data();
 389                 ERR_free_strings();
 390               #if   OPENSSL_VERSION_NUMBER >= 0x10100000L \
 391                 && !defined(LIBRESSL_VERSION_NUMBER)
 392                 /*(OpenSSL libraries handle thread init and deinit)
 393                  * https://github.com/openssl/openssl/pull/1048 */
 394               #elif OPENSSL_VERSION_NUMBER >= 0x10000000L
 395                 ERR_remove_thread_state(NULL);
 396               #else
 397                 ERR_remove_state(0);
 398               #endif
 399                 EVP_cleanup();
 400         }
 401 #endif
 402
 403         free(srv);
 404 }
 405
 406 static void remove_pid_file(server *srv, int *pid_fd) {
 407         if (!buffer_string_is_empty(srv->srvconf.pid_file) && 0 <= *pid_fd) {
 408                 if (0 != ftruncate(*pid_fd, 0)) {
 409                         log_error_write(srv, __FILE__, __LINE__, "sbds",
 410                                         "ftruncate failed for:",
 411                                         srv->srvconf.pid_file,
 412                                         errno,
 413                                         strerror(errno));
 414                 }
 415         }
 416         if (0 <= *pid_fd) {
 417                 close(*pid_fd);
 418                 *pid_fd = -1;
 419         }
 420         if (!buffer_string_is_empty(srv->srvconf.pid_file) &&
 421             buffer_string_is_empty(srv->srvconf.changeroot)) {
 422                 if (0 != unlink(srv->srvconf.pid_file->ptr)) {
 423                         if (errno != EACCES && errno != EPERM) {
 424                                 log_error_write(srv, __FILE__, __LINE__, "sbds",
 425                                                 "unlink failed for:",
 426                                                 srv->srvconf.pid_file,
 427                                                 errno,
 428                                                 strerror(errno));
 429                         }
 430                 }
 431         }
 432 }
 433
 434
 435 static server_socket * server_oneshot_getsock(server *srv, sock_addr *cnt_addr) {
 436         server_socket *srv_socket, *srv_socket_wild = NULL;
 437         size_t i;
 438         for (i = 0; i < srv->srv_sockets.used; ++i) {
 439                 srv_socket = srv->srv_sockets.ptr[i];
 440                 if (cnt_addr->plain.sa_family != srv_socket->addr.plain.sa_family) continue;
 441                 switch (cnt_addr->plain.sa_family) {
 442                 case AF_INET:
 443                         if (srv_socket->addr.ipv4.sin_port != cnt_addr->ipv4.sin_port) continue;
 444                         if (srv_socket->addr.ipv4.sin_addr.s_addr == cnt_addr->ipv4.sin_addr.s_addr) {
 445                                 return srv_socket;
 446                         }
 447                         if (srv_socket->addr.ipv4.sin_addr.s_addr == htonl(INADDR_ANY)) {
 448                                 srv_socket_wild = srv_socket;
 449                         }
 450                         continue;
 451                 #ifdef HAVE_IPV6
 452                 case AF_INET6:
 453                         if (srv_socket->addr.ipv6.sin6_port != cnt_addr->ipv6.sin6_port) continue;
 454                         if (0 == memcmp(&srv_socket->addr.ipv6.sin6_addr, &cnt_addr->ipv6.sin6_addr, sizeof(struct in6_addr))) {
 455                                 return srv_socket;
 456                         }
 457                         if (0 == memcmp(&srv_socket->addr.ipv6.sin6_addr, &in6addr_any, sizeof(struct in6_addr))) {
 458                                 srv_socket_wild = srv_socket;
 459                         }
 460                         continue;
 461                 #endif
 462                 #ifdef HAVE_SYS_UN_H
 463                 case AF_UNIX:
 464                         if (0 == strcmp(srv_socket->addr.un.sun_path, cnt_addr->un.sun_path)) {
 465                                 return srv_socket;
 466                         }
 467                         continue;
 468                 #endif
 469                 default: continue;
 470                 }
 471         }
 472
 473         if (NULL != srv_socket_wild) {
 474                 return srv_socket_wild;
 475         } else if (srv->srv_sockets.used) {
 476                 return srv->srv_sockets.ptr[0];
 477         } else {
 478                 log_error_write(srv, __FILE__, __LINE__, "s", "no sockets configured");
 479                 return NULL;
 480         }
 481 }
 482
 483
 484 static int server_oneshot_init(server *srv, int fd) {
 485         /* Note: does not work with netcat due to requirement that fd be socket.
 486          * STDOUT_FILENO was not saved earlier in startup, and that is to where
 487          * netcat expects output to be sent.  Since lighttpd expects connections
 488          * to be sockets, con->fd is where output is sent; separate fds are not
 489          * stored for input and output, but netcat has different fds for stdin
 490          * and * stdout.  To support netcat, would additionally need to avoid
 491          * S_ISSOCK(), getsockname(), and getpeername() below, reconstructing
 492          * addresses from environment variables:
 493          *   NCAT_LOCAL_ADDR   NCAT_LOCAL_PORT
 494          *   NCAT_REMOTE_ADDR  NCAT_REMOTE_PORT
 495          *   NCAT_PROTO
 496          */
 497         connection *con;
 498         server_socket *srv_socket;
 499         sock_addr cnt_addr;
 500         socklen_t cnt_len;
 501         struct stat st;
 502
 503         if (0 != fstat(fd, &st)) {
 504                 log_error_write(srv, __FILE__, __LINE__, "ss", "fstat:", strerror(errno));
 505                 return 0;
 506         }
 507
 508         if (!S_ISSOCK(st.st_mode)) {
 509                 /* require that fd is a socket
 510                  * (modules might expect STDIN_FILENO and STDOUT_FILENO opened to /dev/null) */
 511                 log_error_write(srv, __FILE__, __LINE__, "s", "lighttpd -1 stdin is not a socket");
 512                 return 0;
 513         }
 514
 515         cnt_len = sizeof(cnt_addr);
 516         if (0 != getsockname(fd, (struct sockaddr *)&cnt_addr, &cnt_len)) {
 517                 log_error_write(srv, __FILE__, __LINE__, "ss", "getsockname:", strerror(errno));
 518                 return 0;
 519         }
 520
 521         srv_socket = server_oneshot_getsock(srv, &cnt_addr);
 522         if (NULL == srv_socket) return 0;
 523
 524         cnt_len = sizeof(cnt_addr);
 525         if (0 != getpeername(fd, (struct sockaddr *)&cnt_addr, &cnt_len)) {
 526                 log_error_write(srv, __FILE__, __LINE__, "ss", "getpeername:", strerror(errno));
 527                 return 0;
 528         }
 529
 530         con = connection_accepted(srv, srv_socket, &cnt_addr, fd);
 531         if (NULL == con) return 0;
 532
 533         connection_state_machine(srv, con);
 534         return 1;
 535 }
 536
 537
 538 static void show_version (void) {
 539 #ifdef USE_OPENSSL
 540 # define TEXT_SSL " (ssl)"
 541 #else
 542 # define TEXT_SSL
 543 #endif
 544         char *b = PACKAGE_DESC TEXT_SSL \
 545 " - a light and fast webserver\n" \
 546 "Build-Date: " __DATE__ " " __TIME__ "\n";
 547 ;
 548 #undef TEXT_SSL
 549         write_all(STDOUT_FILENO, b, strlen(b));
 550 }
 551
 552 static void show_features (void) {
 553   const char features[] = ""
 554 #ifdef USE_SELECT
 555       "\t+ select (generic)\n"
 556 #else
 557       "\t- select (generic)\n"
 558 #endif
 559 #ifdef USE_POLL
 560       "\t+ poll (Unix)\n"
 561 #else
 562       "\t- poll (Unix)\n"
 563 #endif
 564 #ifdef USE_LINUX_SIGIO
 565       "\t+ rt-signals (Linux 2.4+)\n"
 566 #else
 567       "\t- rt-signals (Linux 2.4+)\n"
 568 #endif
 569 #ifdef USE_LINUX_EPOLL
 570       "\t+ epoll (Linux 2.6)\n"
 571 #else
 572       "\t- epoll (Linux 2.6)\n"
 573 #endif
 574 #ifdef USE_SOLARIS_DEVPOLL
 575       "\t+ /dev/poll (Solaris)\n"
 576 #else
 577       "\t- /dev/poll (Solaris)\n"
 578 #endif
 579 #ifdef USE_SOLARIS_PORT
 580       "\t+ eventports (Solaris)\n"
 581 #else
 582       "\t- eventports (Solaris)\n"
 583 #endif
 584 #ifdef USE_FREEBSD_KQUEUE
 585       "\t+ kqueue (FreeBSD)\n"
 586 #else
 587       "\t- kqueue (FreeBSD)\n"
 588 #endif
 589 #ifdef USE_LIBEV
 590       "\t+ libev (generic)\n"
 591 #else
 592       "\t- libev (generic)\n"
 593 #endif
 594       "\nNetwork handler:\n\n"
 595 #if defined USE_LINUX_SENDFILE
 596       "\t+ linux-sendfile\n"
 597 #else
 598       "\t- linux-sendfile\n"
 599 #endif
 600 #if defined USE_FREEBSD_SENDFILE
 601       "\t+ freebsd-sendfile\n"
 602 #else
 603       "\t- freebsd-sendfile\n"
 604 #endif
 605 #if defined USE_DARWIN_SENDFILE
 606       "\t+ darwin-sendfile\n"
 607 #else
 608       "\t- darwin-sendfile\n"
 609 #endif
 610 #if defined USE_SOLARIS_SENDFILEV
 611       "\t+ solaris-sendfilev\n"
 612 #else
 613       "\t- solaris-sendfilev\n"
 614 #endif
 615 #if defined USE_WRITEV
 616       "\t+ writev\n"
 617 #else
 618       "\t- writev\n"
 619 #endif
 620       "\t+ write\n"
 621 #ifdef USE_MMAP
 622       "\t+ mmap support\n"
 623 #else
 624       "\t- mmap support\n"
 625 #endif
 626       "\nFeatures:\n\n"
 627 #ifdef HAVE_IPV6
 628       "\t+ IPv6 support\n"
 629 #else
 630       "\t- IPv6 support\n"
 631 #endif
 632 #if defined HAVE_ZLIB_H && defined HAVE_LIBZ
 633       "\t+ zlib support\n"
 634 #else
 635       "\t- zlib support\n"
 636 #endif
 637 #if defined HAVE_BZLIB_H && defined HAVE_LIBBZ2
 638       "\t+ bzip2 support\n"
 639 #else
 640       "\t- bzip2 support\n"
 641 #endif
 642 #if defined(HAVE_CRYPT) || defined(HAVE_CRYPT_R) || defined(HAVE_LIBCRYPT)
 643       "\t+ crypt support\n"
 644 #else
 645       "\t- crypt support\n"
 646 #endif
 647 #ifdef USE_OPENSSL
 648       "\t+ SSL Support\n"
 649 #else
 650       "\t- SSL Support\n"
 651 #endif
 652 #ifdef HAVE_LIBPCRE
 653       "\t+ PCRE support\n"
 654 #else
 655       "\t- PCRE support\n"
 656 #endif
 657 #ifdef HAVE_MYSQL
 658       "\t+ mySQL support\n"
 659 #else
 660       "\t- mySQL support\n"
 661 #endif
 662 #if defined(HAVE_LDAP_H) && defined(HAVE_LBER_H) && defined(HAVE_LIBLDAP) && defined(HAVE_LIBLBER)
 663       "\t+ LDAP support\n"
 664 #else
 665       "\t- LDAP support\n"
 666 #endif
 667 #ifdef USE_MEMCACHED
 668       "\t+ memcached support\n"
 669 #else
 670       "\t- memcached support\n"
 671 #endif
 672 #ifdef HAVE_FAM_H
 673       "\t+ FAM support\n"
 674 #else
 675       "\t- FAM support\n"
 676 #endif
 677 #ifdef HAVE_LUA_H
 678       "\t+ LUA support\n"
 679 #else
 680       "\t- LUA support\n"
 681 #endif
 682 #ifdef HAVE_LIBXML_H
 683       "\t+ xml support\n"
 684 #else
 685       "\t- xml support\n"
 686 #endif
 687 #ifdef HAVE_SQLITE3_H
 688       "\t+ SQLite support\n"
 689 #else
 690       "\t- SQLite support\n"
 691 #endif
 692 #ifdef HAVE_GDBM_H
 693       "\t+ GDBM support\n"
 694 #else
 695       "\t- GDBM support\n"
 696 #endif
 697       "\n";
 698   show_version();
 699   printf("\nEvent Handlers:\n\n%s", features);
 700 }
 701
 702 static void show_help (void) {
 703 #ifdef USE_OPENSSL
 704 # define TEXT_SSL " (ssl)"
 705 #else
 706 # define TEXT_SSL
 707 #endif
 708         char *b = PACKAGE_DESC TEXT_SSL " ("__DATE__ " " __TIME__ ")" \
 709 " - a light and fast webserver\n" \
 710 "usage:\n" \
 711 " -f <name>  filename of the config-file\n" \
 712 " -m <name>  module directory (default: "LIBRARY_DIR")\n" \
 713 " -i <secs>  graceful shutdown after <secs> of inactivity\n" \
 714 " -1         process single (one) request on stdin socket, then exit\n" \
 715 " -p         print the parsed config-file in internal form, and exit\n" \
 716 " -t         test the config-file, and exit\n" \
 717 " -D         don't go to background (default: go to background)\n" \
 718 " -v         show version\n" \
 719 " -V         show compile-time features\n" \
 720 " -h         show this help\n" \
 721 "\n"
 722 ;
 723 #undef TEXT_SSL
 724 #undef TEXT_IPV6
 725         write_all(STDOUT_FILENO, b, strlen(b));
 726 }
 727
 728 int main (int argc, char **argv) {
 729         server *srv = NULL;
 730         int print_config = 0;
 731         int test_config = 0;
 732         int i_am_root;
 733         int o;
 734         int num_childs = 0;
 735         int pid_fd = -1, fd;
 736         size_t i;
 737         time_t idle_limit = 0, last_active_ts = time(NULL);
 738 #ifdef HAVE_SIGACTION
 739         struct sigaction act;
 740 #endif
 741 #ifdef HAVE_GETRLIMIT
 742         struct rlimit rlim;
 743 #endif
 744
 745 #ifdef HAVE_FORK
 746         int parent_pipe_fd = -1;
 747 #endif
 748
 749 #ifdef USE_ALARM
 750         struct itimerval interval;
 751
 752         interval.it_interval.tv_sec = 1;
 753         interval.it_interval.tv_usec = 0;
 754         interval.it_value.tv_sec = 1;
 755         interval.it_value.tv_usec = 0;
 756 #endif
 757
 758         /* for nice %b handling in strfime() */
 759         setlocale(LC_TIME, "C");
 760
 761         if (NULL == (srv = server_init())) {
 762                 fprintf(stderr, "did this really happen?\n");
 763                 return -1;
 764         }
 765
 766         /* init structs done */
 767
 768         srv->srvconf.port = 0;
 769 #ifdef HAVE_GETUID
 770         i_am_root = (getuid() == 0);
 771 #else
 772         i_am_root = 0;
 773 #endif
 774         srv->srvconf.dont_daemonize = 0;
 775         srv->srvconf.preflight_check = 0;
 776
 777         while(-1 != (o = getopt(argc, argv, "f:m:i:hvVD1pt"))) {
 778                 switch(o) {
 779                 case 'f':
 780                         if (srv->config_storage) {
 781                                 log_error_write(srv, __FILE__, __LINE__, "s",
 782                                                 "Can only read one config file. Use the include command to use multiple config files.");
 783
 784                                 server_free(srv);
 785                                 return -1;
 786                         }
 787                         if (config_read(srv, optarg)) {
 788                                 server_free(srv);
 789                                 return -1;
 790                         }
 791                         break;
 792                 case 'm':
 793                         buffer_copy_string(srv->srvconf.modules_dir, optarg);
 794                         break;
 795                 case 'i': {
 796                         char *endptr;
 797                         long timeout = strtol(optarg, &endptr, 0);
 798                         if (!*optarg || *endptr || timeout < 0) {
 799                                 log_error_write(srv, __FILE__, __LINE__, "ss",
 800                                                 "Invalid idle timeout value:", optarg);
 801                                 server_free(srv);
 802                                 return -1;
 803                         }
 804                         idle_limit = (time_t)timeout;
 805                         break;
 806                 }
 807                 case 'p': print_config = 1; break;
 808                 case 't': ++test_config; break;
 809                 case '1': oneshot_fd = dup(STDIN_FILENO); break;
 810                 case 'D': srv->srvconf.dont_daemonize = 1; break;
 811                 case 'v': show_version(); server_free(srv); return 0;
 812                 case 'V': show_features(); server_free(srv); return 0;
 813                 case 'h': show_help(); server_free(srv); return 0;
 814                 default:
 815                         show_help();
 816                         server_free(srv);
 817                         return -1;
 818                 }
 819         }
 820
 821         if (!srv->config_storage) {
 822                 log_error_write(srv, __FILE__, __LINE__, "s",
 823                                 "No configuration available. Try using -f option.");
 824
 825                 server_free(srv);
 826                 return -1;
 827         }
 828
 829         if (print_config) {
 830                 data_unset *dc = srv->config_context->data[0];
 831                 if (dc) {
 832                         dc->print(dc, 0);
 833                         fprintf(stdout, "\n");
 834                 } else {
 835                         /* shouldn't happend */
 836                         fprintf(stderr, "global config not found\n");
 837                 }
 838         }
 839
 840         if (test_config) {
 841                 if (1 == test_config) {
 842                         printf("Syntax OK\n");
 843                 } else { /*(test_config > 1)*/
 844                         test_config = 0;
 845                         srv->srvconf.preflight_check = 1;
 846                         srv->srvconf.dont_daemonize = 1;
 847                         buffer_reset(srv->srvconf.pid_file);
 848                 }
 849         }
 850
 851         if (test_config || print_config) {
 852                 server_free(srv);
 853                 return 0;
 854         }
 855
 856         if (oneshot_fd) {
 857                 if (oneshot_fd <= STDERR_FILENO) {
 858                         log_error_write(srv, __FILE__, __LINE__, "s",
 859                                         "Invalid fds at startup with lighttpd -1");
 860                         server_free(srv);
 861                         return -1;
 862                 }
 863                 graceful_shutdown = 1;
 864                 srv->sockets_disabled = 1;
 865                 srv->srvconf.dont_daemonize = 1;
 866                 buffer_reset(srv->srvconf.pid_file);
 867                 if (srv->srvconf.max_worker) {
 868                         srv->srvconf.max_worker = 0;
 869                         log_error_write(srv, __FILE__, __LINE__, "s",
 870                                         "server one-shot command line option disables server.max-worker config file option.");
 871                 }
 872         }
 873
 874         /* close stdin and stdout, as they are not needed */
 875         openDevNull(STDIN_FILENO);
 876         openDevNull(STDOUT_FILENO);
 877
 878         if (0 != config_set_defaults(srv)) {
 879                 log_error_write(srv, __FILE__, __LINE__, "s",
 880                                 "setting default values failed");
 881                 server_free(srv);
 882                 return -1;
 883         }
 884
 885         /* UID handling */
 886 #ifdef HAVE_GETUID
 887         if (!i_am_root && issetugid()) {
 888                 /* we are setuid-root */
 889
 890                 log_error_write(srv, __FILE__, __LINE__, "s",
 891                                 "Are you nuts ? Don't apply a SUID bit to this binary");
 892
 893                 server_free(srv);
 894                 return -1;
 895         }
 896 #endif
 897
 898         /* check document-root */
 899         if (buffer_string_is_empty(srv->config_storage[0]->document_root)) {
 900                 log_error_write(srv, __FILE__, __LINE__, "s",
 901                                 "document-root is not set\n");
 902
 903                 server_free(srv);
 904
 905                 return -1;
 906         }
 907
 908         if (plugins_load(srv)) {
 909                 log_error_write(srv, __FILE__, __LINE__, "s",
 910                                 "loading plugins finally failed");
 911
 912                 plugins_free(srv);
 913                 server_free(srv);
 914
 915                 return -1;
 916         }
 917
 918         /* open pid file BEFORE chroot */
 919         if (!buffer_string_is_empty(srv->srvconf.pid_file)) {
 920                 if (-1 == (pid_fd = open(srv->srvconf.pid_file->ptr, O_WRONLY | O_CREAT | O_EXCL | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH))) {
 921                         struct stat st;
 922                         if (errno != EEXIST) {
 923                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
 924                                         "opening pid-file failed:", srv->srvconf.pid_file, strerror(errno));
 925                                 return -1;
 926                         }
 927
 928                         if (0 != stat(srv->srvconf.pid_file->ptr, &st)) {
 929                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
 930                                                 "stating existing pid-file failed:", srv->srvconf.pid_file, strerror(errno));
 931                         }
 932
 933                         if (!S_ISREG(st.st_mode)) {
 934                                 log_error_write(srv, __FILE__, __LINE__, "sb",
 935                                                 "pid-file exists and isn't regular file:", srv->srvconf.pid_file);
 936                                 return -1;
 937                         }
 938
 939                         if (-1 == (pid_fd = open(srv->srvconf.pid_file->ptr, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH))) {
 940                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
 941                                                 "opening pid-file failed:", srv->srvconf.pid_file, strerror(errno));
 942                                 return -1;
 943                         }
 944                 }
 945                 fd_close_on_exec(pid_fd);
 946         }
 947
 948         if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
 949                 /* select limits itself
 950                  *
 951                  * as it is a hard limit and will lead to a segfault we add some safety
 952                  * */
 953                 srv->max_fds = FD_SETSIZE - 200;
 954         } else {
 955                 srv->max_fds = 4096;
 956         }
 957
 958         if (i_am_root) {
 959                 struct group *grp = NULL;
 960                 struct passwd *pwd = NULL;
 961                 int use_rlimit = 1;
 962
 963 #ifdef HAVE_VALGRIND_VALGRIND_H
 964                 if (RUNNING_ON_VALGRIND) use_rlimit = 0;
 965 #endif
 966
 967 #ifdef HAVE_GETRLIMIT
 968                 if (0 != getrlimit(RLIMIT_NOFILE, &rlim)) {
 969                         log_error_write(srv, __FILE__, __LINE__,
 970                                         "ss", "couldn't get 'max filedescriptors'",
 971                                         strerror(errno));
 972                         return -1;
 973                 }
 974
 975                 if (use_rlimit && srv->srvconf.max_fds) {
 976                         /* set rlimits */
 977
 978                         rlim.rlim_cur = srv->srvconf.max_fds;
 979                         rlim.rlim_max = srv->srvconf.max_fds;
 980
 981                         if (0 != setrlimit(RLIMIT_NOFILE, &rlim)) {
 982                                 log_error_write(srv, __FILE__, __LINE__,
 983                                                 "ss", "couldn't set 'max filedescriptors'",
 984                                                 strerror(errno));
 985                                 return -1;
 986                         }
 987                 }
 988
 989                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
 990                         srv->max_fds = rlim.rlim_cur < (rlim_t)FD_SETSIZE - 200 ? (int)rlim.rlim_cur : (int)FD_SETSIZE - 200;
 991                 } else {
 992                         srv->max_fds = rlim.rlim_cur;
 993                 }
 994
 995                 /* set core file rlimit, if enable_cores is set */
 996                 if (use_rlimit && srv->srvconf.enable_cores && getrlimit(RLIMIT_CORE, &rlim) == 0) {
 997                         rlim.rlim_cur = rlim.rlim_max;
 998                         setrlimit(RLIMIT_CORE, &rlim);
 999                 }
1000 #endif
1001                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
1002                         /* don't raise the limit above FD_SET_SIZE */
1003                         if (srv->max_fds > ((int)FD_SETSIZE) - 200) {
1004                                 log_error_write(srv, __FILE__, __LINE__, "sd",
1005                                                 "can't raise max filedescriptors above",  FD_SETSIZE - 200,
1006                                                 "if event-handler is 'select'. Use 'poll' or something else or reduce server.max-fds.");
1007                                 return -1;
1008                         }
1009                 }
1010
1011
1012 #ifdef HAVE_PWD_H
1013                 /* set user and group */
1014                 if (!buffer_string_is_empty(srv->srvconf.username)) {
1015                         if (NULL == (pwd = getpwnam(srv->srvconf.username->ptr))) {
1016                                 log_error_write(srv, __FILE__, __LINE__, "sb",
1017                                                 "can't find username", srv->srvconf.username);
1018                                 return -1;
1019                         }
1020
1021                         if (pwd->pw_uid == 0) {
1022                                 log_error_write(srv, __FILE__, __LINE__, "s",
1023                                                 "I will not set uid to 0\n");
1024                                 return -1;
1025                         }
1026                 }
1027
1028                 if (!buffer_string_is_empty(srv->srvconf.groupname)) {
1029                         if (NULL == (grp = getgrnam(srv->srvconf.groupname->ptr))) {
1030                                 log_error_write(srv, __FILE__, __LINE__, "sb",
1031                                         "can't find groupname", srv->srvconf.groupname);
1032                                 return -1;
1033                         }
1034                         if (grp->gr_gid == 0) {
1035                                 log_error_write(srv, __FILE__, __LINE__, "s",
1036                                                 "I will not set gid to 0\n");
1037                                 return -1;
1038                         }
1039                 }
1040 #endif
1041                 /* we need root-perms for port < 1024 */
1042                 if (0 != network_init(srv)) {
1043                         plugins_free(srv);
1044                         server_free(srv);
1045
1046                         return -1;
1047                 }
1048 #ifdef HAVE_PWD_H
1049                 /*
1050                  * Change group before chroot, when we have access
1051                  * to /etc/group
1052                  * */
1053                 if (NULL != grp) {
1054                         if (-1 == setgid(grp->gr_gid)) {
1055                                 log_error_write(srv, __FILE__, __LINE__, "ss", "setgid failed: ", strerror(errno));
1056                                 return -1;
1057                         }
1058                         if (-1 == setgroups(0, NULL)) {
1059                                 log_error_write(srv, __FILE__, __LINE__, "ss", "setgroups failed: ", strerror(errno));
1060                                 return -1;
1061                         }
1062                         if (!buffer_string_is_empty(srv->srvconf.username)) {
1063                                 initgroups(srv->srvconf.username->ptr, grp->gr_gid);
1064                         }
1065                 }
1066 #endif
1067 #ifdef HAVE_CHROOT
1068                 if (!buffer_string_is_empty(srv->srvconf.changeroot)) {
1069                         tzset();
1070
1071                         if (-1 == chroot(srv->srvconf.changeroot->ptr)) {
1072                                 log_error_write(srv, __FILE__, __LINE__, "ss", "chroot failed: ", strerror(errno));
1073                                 return -1;
1074                         }
1075                         if (-1 == chdir("/")) {
1076                                 log_error_write(srv, __FILE__, __LINE__, "ss", "chdir failed: ", strerror(errno));
1077                                 return -1;
1078                         }
1079                 }
1080 #endif
1081 #ifdef HAVE_PWD_H
1082                 /* drop root privs */
1083                 if (NULL != pwd) {
1084                         if (-1 == setuid(pwd->pw_uid)) {
1085                                 log_error_write(srv, __FILE__, __LINE__, "ss", "setuid failed: ", strerror(errno));
1086                                 return -1;
1087                         }
1088                 }
1089 #endif
1090 #if defined(HAVE_SYS_PRCTL_H) && defined(PR_SET_DUMPABLE)
1091                 /**
1092                  * on IRIX 6.5.30 they have prctl() but no DUMPABLE
1093                  */
1094                 if (srv->srvconf.enable_cores) {
1095                         prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
1096                 }
1097 #endif
1098         } else {
1099
1100 #ifdef HAVE_GETRLIMIT
1101                 if (0 != getrlimit(RLIMIT_NOFILE, &rlim)) {
1102                         log_error_write(srv, __FILE__, __LINE__,
1103                                         "ss", "couldn't get 'max filedescriptors'",
1104                                         strerror(errno));
1105                         return -1;
1106                 }
1107
1108                 /**
1109                  * we are not root can can't increase the fd-limit above rlim_max, but we can reduce it
1110                  */
1111                 if (srv->srvconf.max_fds && srv->srvconf.max_fds <= rlim.rlim_max) {
1112                         /* set rlimits */
1113
1114                         rlim.rlim_cur = srv->srvconf.max_fds;
1115
1116                         if (0 != setrlimit(RLIMIT_NOFILE, &rlim)) {
1117                                 log_error_write(srv, __FILE__, __LINE__,
1118                                                 "ss", "couldn't set 'max filedescriptors'",
1119                                                 strerror(errno));
1120                                 return -1;
1121                         }
1122                 }
1123
1124                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
1125                         srv->max_fds = rlim.rlim_cur < (rlim_t)FD_SETSIZE - 200 ? (int)rlim.rlim_cur : (int)FD_SETSIZE - 200;
1126                 } else {
1127                         srv->max_fds = rlim.rlim_cur;
1128                 }
1129
1130                 /* set core file rlimit, if enable_cores is set */
1131                 if (srv->srvconf.enable_cores && getrlimit(RLIMIT_CORE, &rlim) == 0) {
1132                         rlim.rlim_cur = rlim.rlim_max;
1133                         setrlimit(RLIMIT_CORE, &rlim);
1134                 }
1135
1136 #endif
1137                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
1138                         /* don't raise the limit above FD_SET_SIZE */
1139                         if (srv->max_fds > ((int)FD_SETSIZE) - 200) {
1140                                 log_error_write(srv, __FILE__, __LINE__, "sd",
1141                                                 "can't raise max filedescriptors above",  FD_SETSIZE - 200,
1142                                                 "if event-handler is 'select'. Use 'poll' or something else or reduce server.max-fds.");
1143                                 return -1;
1144                         }
1145                 }
1146
1147                 if (0 != network_init(srv)) {
1148                         plugins_free(srv);
1149                         server_free(srv);
1150
1151                         return -1;
1152                 }
1153         }
1154
1155         /* set max-conns */
1156         if (srv->srvconf.max_conns > srv->max_fds/2) {
1157                 /* we can't have more connections than max-fds/2 */
1158                 log_error_write(srv, __FILE__, __LINE__, "sdd", "can't have more connections than fds/2: ", srv->srvconf.max_conns, srv->max_fds);
1159                 srv->max_conns = srv->max_fds/2;
1160         } else if (srv->srvconf.max_conns) {
1161                 /* otherwise respect the wishes of the user */
1162                 srv->max_conns = srv->srvconf.max_conns;
1163         } else {
1164                 /* or use the default: we really don't want to hit max-fds */
1165                 srv->max_conns = srv->max_fds/3;
1166         }
1167
1168         if (HANDLER_GO_ON != plugins_call_init(srv)) {
1169                 log_error_write(srv, __FILE__, __LINE__, "s", "Initialization of plugins failed. Going down.");
1170
1171                 plugins_free(srv);
1172                 network_close(srv);
1173                 server_free(srv);
1174
1175                 return -1;
1176         }
1177
1178 #ifdef HAVE_FORK
1179         /* network is up, let's deamonize ourself */
1180         if (srv->srvconf.dont_daemonize == 0) {
1181                 parent_pipe_fd = daemonize();
1182         }
1183 #endif
1184
1185
1186 #ifdef HAVE_SIGACTION
1187         memset(&act, 0, sizeof(act));
1188         act.sa_handler = SIG_IGN;
1189         sigaction(SIGPIPE, &act, NULL);
1190         sigaction(SIGUSR1, &act, NULL);
1191 # if defined(SA_SIGINFO)
1192         act.sa_sigaction = sigaction_handler;
1193         sigemptyset(&act.sa_mask);
1194         act.sa_flags = SA_SIGINFO;
1195 # else
1196         act.sa_handler = signal_handler;
1197         sigemptyset(&act.sa_mask);
1198         act.sa_flags = 0;
1199 # endif
1200         sigaction(SIGINT,  &act, NULL);
1201         sigaction(SIGTERM, &act, NULL);
1202         sigaction(SIGHUP,  &act, NULL);
1203         sigaction(SIGALRM, &act, NULL);
1204
1205         /* it should be safe to restart syscalls after SIGCHLD */
1206         act.sa_flags |= SA_RESTART | SA_NOCLDSTOP;
1207         sigaction(SIGCHLD, &act, NULL);
1208
1209 #elif defined(HAVE_SIGNAL)
1210         /* ignore the SIGPIPE from sendfile() */
1211         signal(SIGPIPE, SIG_IGN);
1212         signal(SIGUSR1, SIG_IGN);
1213         signal(SIGALRM, signal_handler);
1214         signal(SIGTERM, signal_handler);
1215         signal(SIGHUP,  signal_handler);
1216         signal(SIGCHLD,  signal_handler);
1217         signal(SIGINT,  signal_handler);
1218 #endif
1219
1220 #ifdef USE_ALARM
1221         signal(SIGALRM, signal_handler);
1222
1223         /* setup periodic timer (1 second) */
1224         if (setitimer(ITIMER_REAL, &interval, NULL)) {
1225                 log_error_write(srv, __FILE__, __LINE__, "s", "setting timer failed");
1226                 return -1;
1227         }
1228
1229         getitimer(ITIMER_REAL, &interval);
1230 #endif
1231
1232
1233         srv->gid = getgid();
1234         srv->uid = getuid();
1235
1236         /* write pid file */
1237         if (pid_fd != -1) {
1238                 buffer_copy_int(srv->tmp_buf, getpid());
1239                 buffer_append_string_len(srv->tmp_buf, CONST_STR_LEN("\n"));
1240                 if (-1 == write_all(pid_fd, CONST_BUF_LEN(srv->tmp_buf))) {
1241                         log_error_write(srv, __FILE__, __LINE__, "ss", "Couldn't write pid file:", strerror(errno));
1242                         close(pid_fd);
1243                         return -1;
1244                 }
1245         }
1246
1247         /* Close stderr ASAP in the child process to make sure that nothing
1248          * is being written to that fd which may not be valid anymore. */
1249         if (!srv->srvconf.preflight_check && -1 == log_error_open(srv)) {
1250                 log_error_write(srv, __FILE__, __LINE__, "s", "Opening errorlog failed. Going down.");
1251
1252                 plugins_free(srv);
1253                 network_close(srv);
1254                 server_free(srv);
1255                 return -1;
1256         }
1257
1258         if (HANDLER_GO_ON != plugins_call_set_defaults(srv)) {
1259                 log_error_write(srv, __FILE__, __LINE__, "s", "Configuration of plugins failed. Going down.");
1260
1261                 plugins_free(srv);
1262                 network_close(srv);
1263                 server_free(srv);
1264
1265                 return -1;
1266         }
1267
1268         /* dump unused config-keys */
1269         for (i = 0; i < srv->config_context->used; i++) {
1270                 array *config = ((data_config *)srv->config_context->data[i])->value;
1271                 size_t j;
1272
1273                 for (j = 0; config && j < config->used; j++) {
1274                         data_unset *du = config->data[j];
1275
1276                         /* all var.* is known as user defined variable */
1277                         if (strncmp(du->key->ptr, "var.", sizeof("var.") - 1) == 0) {
1278                                 continue;
1279                         }
1280
1281                         if (NULL == array_get_element(srv->config_touched, du->key->ptr)) {
1282                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
1283                                                 "WARNING: unknown config-key:",
1284                                                 du->key,
1285                                                 "(ignored)");
1286                         }
1287                 }
1288         }
1289
1290         if (srv->config_unsupported) {
1291                 log_error_write(srv, __FILE__, __LINE__, "s",
1292                                 "Configuration contains unsupported keys. Going down.");
1293         }
1294
1295         if (srv->config_deprecated) {
1296                 log_error_write(srv, __FILE__, __LINE__, "s",
1297                                 "Configuration contains deprecated keys. Going down.");
1298         }
1299
1300         if (srv->config_unsupported || srv->config_deprecated) {
1301                 plugins_free(srv);
1302                 network_close(srv);
1303                 server_free(srv);
1304
1305                 return -1;
1306         }
1307
1308         if (srv->srvconf.preflight_check) {
1309                 /*printf("Preflight OK");*//*(stdout reopened to /dev/null)*/
1310                 plugins_free(srv);
1311                 network_close(srv);
1312                 server_free(srv);
1313
1314                 exit(0);
1315         }
1316
1317
1318 #ifdef HAVE_FORK
1319         /**
1320          * notify daemonize-grandparent of successful startup
1321          * do this before any further forking is done (workers)
1322          */
1323         if (srv->srvconf.dont_daemonize == 0) {
1324                 if (0 > write(parent_pipe_fd, "", 1)) return -1;
1325                 close(parent_pipe_fd);
1326         }
1327
1328         if (idle_limit && srv->srvconf.max_worker) {
1329                 srv->srvconf.max_worker = 0;
1330                 log_error_write(srv, __FILE__, __LINE__, "s",
1331                                 "server idle time limit command line option disables server.max-worker config file option.");
1332         }
1333
1334         /* start watcher and workers */
1335         num_childs = srv->srvconf.max_worker;
1336         if (num_childs > 0) {
1337                 int child = 0;
1338                 while (!child && !srv_shutdown && !graceful_shutdown) {
1339                         if (num_childs > 0) {
1340                                 switch (fork()) {
1341                                 case -1:
1342                                         return -1;
1343                                 case 0:
1344                                         child = 1;
1345                                         break;
1346                                 default:
1347                                         num_childs--;
1348                                         break;
1349                                 }
1350                         } else {
1351                                 int status;
1352
1353                                 if (-1 != wait(&status)) {
1354                                         /**
1355                                          * one of our workers went away
1356                                          */
1357                                         num_childs++;
1358                                 } else {
1359                                         switch (errno) {
1360                                         case EINTR:
1361                                                 /**
1362                                                  * if we receive a SIGHUP we have to close our logs ourself as we don't
1363                                                  * have the mainloop who can help us here
1364                                                  */
1365                                                 if (handle_sig_hup) {
1366                                                         handle_sig_hup = 0;
1367
1368                                                         log_error_cycle(srv);
1369
1370                                                         /**
1371                                                          * forward to all procs in the process-group
1372                                                          *
1373                                                          * we also send it ourself
1374                                                          */
1375                                                         if (!forwarded_sig_hup && 0 != srv->srvconf.max_worker) {
1376                                                                 forwarded_sig_hup = 1;
1377                                                                 kill(0, SIGHUP);
1378                                                         }
1379                                                 }
1380                                                 break;
1381                                         default:
1382                                                 break;
1383                                         }
1384                                 }
1385                         }
1386                 }
1387
1388                 /**
1389                  * for the parent this is the exit-point
1390                  */
1391                 if (!child) {
1392                         /**
1393                          * kill all children too
1394                          */
1395                         if (graceful_shutdown) {
1396                                 kill(0, SIGINT);
1397                         } else if (srv_shutdown) {
1398                                 kill(0, SIGTERM);
1399                         }
1400
1401                         remove_pid_file(srv, &pid_fd);
1402                         log_error_close(srv);
1403                         network_close(srv);
1404                         connections_free(srv);
1405                         plugins_free(srv);
1406                         server_free(srv);
1407                         return 0;
1408                 }
1409
1410                 /**
1411                  * make sure workers do not muck with pid-file
1412                  */
1413                 if (0 <= pid_fd) {
1414                         close(pid_fd);
1415                         pid_fd = -1;
1416                 }
1417                 buffer_reset(srv->srvconf.pid_file);
1418         }
1419 #endif
1420
1421         if (NULL == (srv->ev = fdevent_init(srv, srv->max_fds + 1, srv->event_handler))) {
1422                 log_error_write(srv, __FILE__, __LINE__,
1423                                 "s", "fdevent_init failed");
1424                 return -1;
1425         }
1426
1427         /* libev backend overwrites our SIGCHLD handler and calls waitpid on SIGCHLD; we want our own SIGCHLD handling. */
1428 #ifdef HAVE_SIGACTION
1429         sigaction(SIGCHLD, &act, NULL);
1430 #elif defined(HAVE_SIGNAL)
1431         signal(SIGCHLD,  signal_handler);
1432 #endif
1433
1434         /*
1435          * kqueue() is called here, select resets its internals,
1436          * all server sockets get their handlers
1437          *
1438          * */
1439         if (0 != network_register_fdevents(srv)) {
1440                 plugins_free(srv);
1441                 network_close(srv);
1442                 server_free(srv);
1443
1444                 return -1;
1445         }
1446
1447         /* might fail if user is using fam (not gamin) and famd isn't running */
1448         if (NULL == (srv->stat_cache = stat_cache_init())) {
1449                 log_error_write(srv, __FILE__, __LINE__, "s",
1450                         "stat-cache could not be setup, dieing.");
1451                 return -1;
1452         }
1453
1454 #ifdef HAVE_FAM_H
1455         /* setup FAM */
1456         if (srv->srvconf.stat_cache_engine == STAT_CACHE_ENGINE_FAM) {
1457                 if (0 != FAMOpen2(&srv->stat_cache->fam, "lighttpd")) {
1458                         log_error_write(srv, __FILE__, __LINE__, "s",
1459                                          "could not open a fam connection, dieing.");
1460                         return -1;
1461                 }
1462 #ifdef HAVE_FAMNOEXISTS
1463                 FAMNoExists(&srv->stat_cache->fam);
1464 #endif
1465
1466                 fdevent_register(srv->ev, FAMCONNECTION_GETFD(&srv->stat_cache->fam), stat_cache_handle_fdevent, NULL);
1467                 fdevent_event_set(srv->ev, &(srv->stat_cache->fam_fcce_ndx), FAMCONNECTION_GETFD(&srv->stat_cache->fam), FDEVENT_IN);
1468         }
1469 #endif
1470
1471
1472         /* get the current number of FDs */
1473         srv->cur_fds = open("/dev/null", O_RDONLY);
1474         close(srv->cur_fds);
1475
1476         for (i = 0; i < srv->srv_sockets.used; i++) {
1477                 server_socket *srv_socket = srv->srv_sockets.ptr[i];
1478                 if (srv->sockets_disabled) continue; /* lighttpd -1 (one-shot mode) */
1479                 if (-1 == fdevent_fcntl_set(srv->ev, srv_socket->fd)) {
1480                         log_error_write(srv, __FILE__, __LINE__, "ss", "fcntl failed:", strerror(errno));
1481                         return -1;
1482                 }
1483         }
1484
1485         if (oneshot_fd && server_oneshot_init(srv, oneshot_fd)) {
1486                 oneshot_fd = -1;
1487         }
1488
1489         /* main-loop */
1490         while (!srv_shutdown) {
1491                 int n;
1492                 size_t ndx;
1493                 time_t min_ts;
1494
1495                 if (handle_sig_hup) {
1496                         handler_t r;
1497
1498                         /* reset notification */
1499                         handle_sig_hup = 0;
1500
1501
1502                         /* cycle logfiles */
1503
1504                         switch(r = plugins_call_handle_sighup(srv)) {
1505                         case HANDLER_GO_ON:
1506                                 break;
1507                         default:
1508                                 log_error_write(srv, __FILE__, __LINE__, "sd", "sighup-handler return with an error", r);
1509                                 break;
1510                         }
1511
1512                         if (-1 == log_error_cycle(srv)) {
1513                                 log_error_write(srv, __FILE__, __LINE__, "s", "cycling errorlog failed, dying");
1514
1515                                 return -1;
1516                         } else {
1517 #ifdef HAVE_SIGACTION
1518                                 log_error_write(srv, __FILE__, __LINE__, "sdsd",
1519                                         "logfiles cycled UID =",
1520                                         last_sighup_info.si_uid,
1521                                         "PID =",
1522                                         last_sighup_info.si_pid);
1523 #else
1524                                 log_error_write(srv, __FILE__, __LINE__, "s",
1525                                         "logfiles cycled");
1526 #endif
1527                         }
1528                 }
1529
1530                 if (handle_sig_alarm) {
1531                         /* a new second */
1532
1533 #ifdef USE_ALARM
1534                         /* reset notification */
1535                         handle_sig_alarm = 0;
1536 #endif
1537
1538                         /* get current time */
1539                         min_ts = time(NULL);
1540
1541                         if (min_ts != srv->cur_ts) {
1542 #ifdef DEBUG_CONNECTION_STATES
1543                                 int cs = 0;
1544 #endif
1545                                 connections *conns = srv->conns;
1546                                 handler_t r;
1547
1548                                 switch(r = plugins_call_handle_trigger(srv)) {
1549                                 case HANDLER_GO_ON:
1550                                         break;
1551                                 case HANDLER_ERROR:
1552                                         log_error_write(srv, __FILE__, __LINE__, "s", "one of the triggers failed");
1553                                         break;
1554                                 default:
1555                                         log_error_write(srv, __FILE__, __LINE__, "d", r);
1556                                         break;
1557                                 }
1558
1559                                 /* trigger waitpid */
1560                                 srv->cur_ts = min_ts;
1561
1562                                 /* check idle time limit, if enabled */
1563                                 if (idle_limit && idle_limit < min_ts - last_active_ts && !graceful_shutdown) {
1564                                         log_error_write(srv, __FILE__, __LINE__, "sDs", "[note] idle timeout", (int)idle_limit,
1565                                                         "s exceeded, initiating graceful shutdown");
1566                                         graceful_shutdown = 2; /* value 2 indicates idle timeout */
1567                                 }
1568
1569                                 /* cleanup stat-cache */
1570                                 stat_cache_trigger_cleanup(srv);
1571                                 /**
1572                                  * check all connections for timeouts
1573                                  *
1574                                  */
1575                                 for (ndx = 0; ndx < conns->used; ndx++) {
1576                                         int changed = 0;
1577                                         connection *con;
1578                                         int t_diff;
1579
1580                                         con = conns->ptr[ndx];
1581
1582                                         if (con->state == CON_STATE_READ ||
1583                                             con->state == CON_STATE_READ_POST) {
1584                                                 if (con->request_count == 1 || con->state == CON_STATE_READ_POST) {
1585                                                         if (srv->cur_ts - con->read_idle_ts > con->conf.max_read_idle) {
1586                                                                 /* time - out */
1587                                                                 if (con->conf.log_request_handling) {
1588                                                                         log_error_write(srv, __FILE__, __LINE__, "sd",
1589                                                                                 "connection closed - read timeout:", con->fd);
1590                                                                 }
1591
1592                                                                 connection_set_state(srv, con, CON_STATE_ERROR);
1593                                                                 changed = 1;
1594                                                         }
1595                                                 } else {
1596                                                         if (srv->cur_ts - con->read_idle_ts > con->keep_alive_idle) {
1597                                                                 /* time - out */
1598                                                                 if (con->conf.log_request_handling) {
1599                                                                         log_error_write(srv, __FILE__, __LINE__, "sd",
1600                                                                                 "connection closed - keep-alive timeout:", con->fd);
1601                                                                 }
1602
1603                                                                 connection_set_state(srv, con, CON_STATE_ERROR);
1604                                                                 changed = 1;
1605                                                         }
1606                                                 }
1607                                         }
1608
1609                                         if ((con->state == CON_STATE_WRITE) &&
1610                                             (con->write_request_ts != 0)) {
1611 #if 0
1612                                                 if (srv->cur_ts - con->write_request_ts > 60) {
1613                                                         log_error_write(srv, __FILE__, __LINE__, "sdd",
1614                                                                         "connection closed - pre-write-request-timeout:", con->fd, srv->cur_ts - con->write_request_ts);
1615                                                 }
1616 #endif
1617
1618                                                 if (srv->cur_ts - con->write_request_ts > con->conf.max_write_idle) {
1619                                                         /* time - out */
1620                                                         if (con->conf.log_timeouts) {
1621                                                                 log_error_write(srv, __FILE__, __LINE__, "sbsbsosds",
1622                                                                         "NOTE: a request from",
1623                                                                         con->dst_addr_buf,
1624                                                                         "for",
1625                                                                         con->request.uri,
1626                                                                         "timed out after writing",
1627                                                                         con->bytes_written,
1628                                                                         "bytes. We waited",
1629                                                                         (int)con->conf.max_write_idle,
1630                                                                         "seconds. If this a problem increase server.max-write-idle");
1631                                                         }
1632                                                         connection_set_state(srv, con, CON_STATE_ERROR);
1633                                                         changed = 1;
1634                                                 }
1635                                         }
1636
1637                                         if (con->state == CON_STATE_CLOSE && (srv->cur_ts - con->close_timeout_ts > HTTP_LINGER_TIMEOUT)) {
1638                                                 changed = 1;
1639                                         }
1640
1641                                         /* we don't like div by zero */
1642                                         if (0 == (t_diff = srv->cur_ts - con->connection_start)) t_diff = 1;
1643
1644                                         if (con->traffic_limit_reached &&
1645                                             (con->conf.kbytes_per_second == 0 ||
1646                                              ((con->bytes_written / t_diff) < con->conf.kbytes_per_second * 1024))) {
1647                                                 /* enable connection again */
1648                                                 con->traffic_limit_reached = 0;
1649
1650                                                 changed = 1;
1651                                         }
1652
1653                                         if (changed) {
1654                                                 connection_state_machine(srv, con);
1655                                         }
1656                                         con->bytes_written_cur_second = 0;
1657                                         *(con->conf.global_bytes_per_second_cnt_ptr) = 0;
1658
1659 #if DEBUG_CONNECTION_STATES
1660                                         if (cs == 0) {
1661                                                 fprintf(stderr, "connection-state: ");
1662                                                 cs = 1;
1663                                         }
1664
1665                                         fprintf(stderr, "c[%d,%d]: %s ",
1666                                                 con->fd,
1667                                                 con->fcgi.fd,
1668                                                 connection_get_state(con->state));
1669 #endif
1670                                 }
1671
1672 #ifdef DEBUG_CONNECTION_STATES
1673                                 if (cs == 1) fprintf(stderr, "\n");
1674 #endif
1675                         }
1676                 }
1677
1678                 if (srv->sockets_disabled) {
1679                         /* our server sockets are disabled, why ? */
1680
1681                         if ((srv->cur_fds + srv->want_fds < srv->max_fds * 8 / 10) && /* we have enough unused fds */
1682                             (srv->conns->used <= srv->max_conns * 9 / 10) &&
1683                             (0 == graceful_shutdown)) {
1684                                 for (i = 0; i < srv->srv_sockets.used; i++) {
1685                                         server_socket *srv_socket = srv->srv_sockets.ptr[i];
1686                                         fdevent_event_set(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd, FDEVENT_IN);
1687                                 }
1688
1689                                 log_error_write(srv, __FILE__, __LINE__, "s", "[note] sockets enabled again");
1690
1691                                 srv->sockets_disabled = 0;
1692                         }
1693                 } else {
1694                         if ((srv->cur_fds + srv->want_fds > srv->max_fds * 9 / 10) || /* out of fds */
1695                             (srv->conns->used >= srv->max_conns) || /* out of connections */
1696                             (graceful_shutdown)) { /* graceful_shutdown */
1697
1698                                 /* disable server-fds */
1699
1700                                 for (i = 0; i < srv->srv_sockets.used; i++) {
1701                                         server_socket *srv_socket = srv->srv_sockets.ptr[i];
1702
1703                                         if (graceful_shutdown) {
1704                                                 /* we don't want this socket anymore,
1705                                                  *
1706                                                  * closing it right away will make it possible for
1707                                                  * the next lighttpd to take over (graceful restart)
1708                                                  *  */
1709
1710                                                 fdevent_event_del(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd);
1711                                                 fdevent_unregister(srv->ev, srv_socket->fd);
1712                                                 close(srv_socket->fd);
1713                                                 srv_socket->fd = -1;
1714
1715                                                 /* network_close() will cleanup after us */
1716                                         } else {
1717                                                 fdevent_event_set(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd, 0);
1718                                         }
1719                                 }
1720
1721                                 if (graceful_shutdown) {
1722                                         remove_pid_file(srv, &pid_fd);
1723                                         log_error_write(srv, __FILE__, __LINE__, "s", "[note] graceful shutdown started");
1724                                 } else if (srv->conns->used >= srv->max_conns) {
1725                                         log_error_write(srv, __FILE__, __LINE__, "s", "[note] sockets disabled, connection limit reached");
1726                                 } else {
1727                                         log_error_write(srv, __FILE__, __LINE__, "s", "[note] sockets disabled, out-of-fds");
1728                                 }
1729
1730                                 srv->sockets_disabled = 1;
1731                         }
1732                 }
1733
1734                 if (graceful_shutdown && srv->conns->used == 0) {
1735                         /* we are in graceful shutdown phase and all connections are closed
1736                          * we are ready to terminate without harming anyone */
1737                         srv_shutdown = 1;
1738                 }
1739
1740                 /* we still have some fds to share */
1741                 if (srv->want_fds) {
1742                         /* check the fdwaitqueue for waiting fds */
1743                         int free_fds = srv->max_fds - srv->cur_fds - 16;
1744                         connection *con;
1745
1746                         for (; free_fds > 0 && NULL != (con = fdwaitqueue_unshift(srv, srv->fdwaitqueue)); free_fds--) {
1747                                 connection_state_machine(srv, con);
1748
1749                                 srv->want_fds--;
1750                         }
1751                 }
1752
1753                 if ((n = fdevent_poll(srv->ev, 1000)) > 0) {
1754                         /* n is the number of events */
1755                         int revents;
1756                         int fd_ndx;
1757 #if 0
1758                         if (n > 0) {
1759                                 log_error_write(srv, __FILE__, __LINE__, "sd",
1760                                                 "polls:", n);
1761                         }
1762 #endif
1763                         last_active_ts = srv->cur_ts;
1764                         fd_ndx = -1;
1765                         do {
1766                                 fdevent_handler handler;
1767                                 void *context;
1768                                 handler_t r;
1769
1770                                 fd_ndx  = fdevent_event_next_fdndx (srv->ev, fd_ndx);
1771                                 if (-1 == fd_ndx) break; /* not all fdevent handlers know how many fds got an event */
1772
1773                                 revents = fdevent_event_get_revent (srv->ev, fd_ndx);
1774                                 fd      = fdevent_event_get_fd     (srv->ev, fd_ndx);
1775                                 handler = fdevent_get_handler(srv->ev, fd);
1776                                 context = fdevent_get_context(srv->ev, fd);
1777
1778                                 /* connection_handle_fdevent needs a joblist_append */
1779 #if 0
1780                                 log_error_write(srv, __FILE__, __LINE__, "sdd",
1781                                                 "event for", fd, revents);
1782 #endif
1783                                 switch (r = (*handler)(srv, context, revents)) {
1784                                 case HANDLER_FINISHED:
1785                                 case HANDLER_GO_ON:
1786                                 case HANDLER_WAIT_FOR_EVENT:
1787                                 case HANDLER_WAIT_FOR_FD:
1788                                         break;
1789                                 case HANDLER_ERROR:
1790                                         /* should never happen */
1791                                         SEGFAULT();
1792                                         break;
1793                                 default:
1794                                         log_error_write(srv, __FILE__, __LINE__, "d", r);
1795                                         break;
1796                                 }
1797                         } while (--n > 0);
1798                 } else if (n < 0 && errno != EINTR) {
1799                         log_error_write(srv, __FILE__, __LINE__, "ss",
1800                                         "fdevent_poll failed:",
1801                                         strerror(errno));
1802                 }
1803
1804                 for (ndx = 0; ndx < srv->joblist->used; ndx++) {
1805                         connection *con = srv->joblist->ptr[ndx];
1806                         connection_state_machine(srv, con);
1807                         con->in_joblist = 0;
1808                 }
1809
1810                 srv->joblist->used = 0;
1811         }
1812
1813         if (0 == graceful_shutdown) {
1814                 remove_pid_file(srv, &pid_fd);
1815         }
1816
1817         if (2 == graceful_shutdown) { /* value 2 indicates idle timeout */
1818                 log_error_write(srv, __FILE__, __LINE__, "s",
1819                                 "server stopped after idle timeout");
1820         } else {
1821 #ifdef HAVE_SIGACTION
1822                 log_error_write(srv, __FILE__, __LINE__, "sdsd",
1823                                 "server stopped by UID =",
1824                                 last_sigterm_info.si_uid,
1825                                 "PID =",
1826                                 last_sigterm_info.si_pid);
1827 #else
1828                 log_error_write(srv, __FILE__, __LINE__, "s",
1829                                 "server stopped");
1830 #endif
1831         }
1832
1833         /* clean-up */
1834         log_error_close(srv);
1835         network_close(srv);
1836         connections_free(srv);
1837         plugins_free(srv);
1838         server_free(srv);
1839
1840         return 0;
1841 }