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         srv->srvconf.http_header_strict  = 1;
 281         srv->srvconf.http_host_strict    = 1; /*(implies http_host_normalize)*/
 282         srv->srvconf.http_host_normalize = 0;
 283
 284         /* use syslog */
 285         srv->errorlog_fd = STDERR_FILENO;
 286         srv->errorlog_mode = ERRORLOG_FD;
 287
 288         srv->split_vals = array_init();
 289
 290         return srv;
 291 }
 292
 293 static void server_free(server *srv) {
 294         size_t i;
 295
 296         for (i = 0; i < FILE_CACHE_MAX; i++) {
 297                 buffer_free(srv->mtime_cache[i].str);
 298         }
 299
 300         if (oneshot_fd > 0) {
 301                 close(oneshot_fd);
 302         }
 303
 304 #define CLEAN(x) \
 305         buffer_free(srv->x);
 306
 307         CLEAN(response_header);
 308         CLEAN(parse_full_path);
 309         CLEAN(ts_debug_str);
 310         CLEAN(ts_date_str);
 311         CLEAN(errorlog_buf);
 312         CLEAN(response_range);
 313         CLEAN(tmp_buf);
 314         CLEAN(empty_string);
 315         CLEAN(cond_check_buf);
 316
 317         CLEAN(srvconf.errorlog_file);
 318         CLEAN(srvconf.breakagelog_file);
 319         CLEAN(srvconf.groupname);
 320         CLEAN(srvconf.username);
 321         CLEAN(srvconf.changeroot);
 322         CLEAN(srvconf.bindhost);
 323         CLEAN(srvconf.event_handler);
 324         CLEAN(srvconf.pid_file);
 325         CLEAN(srvconf.modules_dir);
 326         CLEAN(srvconf.network_backend);
 327         CLEAN(srvconf.xattr_name);
 328
 329         CLEAN(tmp_chunk_len);
 330 #undef CLEAN
 331
 332 #if 0
 333         fdevent_unregister(srv->ev, srv->fd);
 334 #endif
 335         fdevent_free(srv->ev);
 336
 337         free(srv->conns);
 338
 339         if (srv->config_storage) {
 340                 for (i = 0; i < srv->config_context->used; i++) {
 341                         specific_config *s = srv->config_storage[i];
 342
 343                         if (!s) continue;
 344
 345                         buffer_free(s->document_root);
 346                         buffer_free(s->server_name);
 347                         buffer_free(s->server_tag);
 348                         buffer_free(s->ssl_pemfile);
 349                         buffer_free(s->ssl_ca_file);
 350                         buffer_free(s->ssl_cipher_list);
 351                         buffer_free(s->ssl_dh_file);
 352                         buffer_free(s->ssl_ec_curve);
 353                         buffer_free(s->error_handler);
 354                         buffer_free(s->error_handler_404);
 355                         buffer_free(s->errorfile_prefix);
 356                         array_free(s->mimetypes);
 357                         buffer_free(s->ssl_verifyclient_username);
 358 #ifdef USE_OPENSSL
 359                         SSL_CTX_free(s->ssl_ctx);
 360                         EVP_PKEY_free(s->ssl_pemfile_pkey);
 361                         X509_free(s->ssl_pemfile_x509);
 362                         if (NULL != s->ssl_ca_file_cert_names) sk_X509_NAME_pop_free(s->ssl_ca_file_cert_names, X509_NAME_free);
 363 #endif
 364                         free(s);
 365                 }
 366                 free(srv->config_storage);
 367                 srv->config_storage = NULL;
 368         }
 369
 370 #define CLEAN(x) \
 371         array_free(srv->x);
 372
 373         CLEAN(config_context);
 374         CLEAN(config_touched);
 375         CLEAN(status);
 376         CLEAN(srvconf.upload_tempdirs);
 377 #undef CLEAN
 378
 379         joblist_free(srv, srv->joblist);
 380         fdwaitqueue_free(srv, srv->fdwaitqueue);
 381
 382         if (srv->stat_cache) {
 383                 stat_cache_free(srv->stat_cache);
 384         }
 385
 386         array_free(srv->srvconf.modules);
 387         array_free(srv->split_vals);
 388
 389 #ifdef USE_OPENSSL
 390         if (srv->ssl_is_init) {
 391                 CRYPTO_cleanup_all_ex_data();
 392                 ERR_free_strings();
 393               #if   OPENSSL_VERSION_NUMBER >= 0x10100000L \
 394                 && !defined(LIBRESSL_VERSION_NUMBER)
 395                 /*(OpenSSL libraries handle thread init and deinit)
 396                  * https://github.com/openssl/openssl/pull/1048 */
 397               #elif OPENSSL_VERSION_NUMBER >= 0x10000000L
 398                 ERR_remove_thread_state(NULL);
 399               #else
 400                 ERR_remove_state(0);
 401               #endif
 402                 EVP_cleanup();
 403         }
 404 #endif
 405
 406         free(srv);
 407 }
 408
 409 static void remove_pid_file(server *srv, int *pid_fd) {
 410         if (!buffer_string_is_empty(srv->srvconf.pid_file) && 0 <= *pid_fd) {
 411                 if (0 != ftruncate(*pid_fd, 0)) {
 412                         log_error_write(srv, __FILE__, __LINE__, "sbds",
 413                                         "ftruncate failed for:",
 414                                         srv->srvconf.pid_file,
 415                                         errno,
 416                                         strerror(errno));
 417                 }
 418         }
 419         if (0 <= *pid_fd) {
 420                 close(*pid_fd);
 421                 *pid_fd = -1;
 422         }
 423         if (!buffer_string_is_empty(srv->srvconf.pid_file) &&
 424             buffer_string_is_empty(srv->srvconf.changeroot)) {
 425                 if (0 != unlink(srv->srvconf.pid_file->ptr)) {
 426                         if (errno != EACCES && errno != EPERM) {
 427                                 log_error_write(srv, __FILE__, __LINE__, "sbds",
 428                                                 "unlink failed for:",
 429                                                 srv->srvconf.pid_file,
 430                                                 errno,
 431                                                 strerror(errno));
 432                         }
 433                 }
 434         }
 435 }
 436
 437
 438 static server_socket * server_oneshot_getsock(server *srv, sock_addr *cnt_addr) {
 439         server_socket *srv_socket, *srv_socket_wild = NULL;
 440         size_t i;
 441         for (i = 0; i < srv->srv_sockets.used; ++i) {
 442                 srv_socket = srv->srv_sockets.ptr[i];
 443                 if (cnt_addr->plain.sa_family != srv_socket->addr.plain.sa_family) continue;
 444                 switch (cnt_addr->plain.sa_family) {
 445                 case AF_INET:
 446                         if (srv_socket->addr.ipv4.sin_port != cnt_addr->ipv4.sin_port) continue;
 447                         if (srv_socket->addr.ipv4.sin_addr.s_addr == cnt_addr->ipv4.sin_addr.s_addr) {
 448                                 return srv_socket;
 449                         }
 450                         if (srv_socket->addr.ipv4.sin_addr.s_addr == htonl(INADDR_ANY)) {
 451                                 srv_socket_wild = srv_socket;
 452                         }
 453                         continue;
 454                 #ifdef HAVE_IPV6
 455                 case AF_INET6:
 456                         if (srv_socket->addr.ipv6.sin6_port != cnt_addr->ipv6.sin6_port) continue;
 457                         if (0 == memcmp(&srv_socket->addr.ipv6.sin6_addr, &cnt_addr->ipv6.sin6_addr, sizeof(struct in6_addr))) {
 458                                 return srv_socket;
 459                         }
 460                         if (0 == memcmp(&srv_socket->addr.ipv6.sin6_addr, &in6addr_any, sizeof(struct in6_addr))) {
 461                                 srv_socket_wild = srv_socket;
 462                         }
 463                         continue;
 464                 #endif
 465                 #ifdef HAVE_SYS_UN_H
 466                 case AF_UNIX:
 467                         if (0 == strcmp(srv_socket->addr.un.sun_path, cnt_addr->un.sun_path)) {
 468                                 return srv_socket;
 469                         }
 470                         continue;
 471                 #endif
 472                 default: continue;
 473                 }
 474         }
 475
 476         if (NULL != srv_socket_wild) {
 477                 return srv_socket_wild;
 478         } else if (srv->srv_sockets.used) {
 479                 return srv->srv_sockets.ptr[0];
 480         } else {
 481                 log_error_write(srv, __FILE__, __LINE__, "s", "no sockets configured");
 482                 return NULL;
 483         }
 484 }
 485
 486
 487 static int server_oneshot_init(server *srv, int fd) {
 488         /* Note: does not work with netcat due to requirement that fd be socket.
 489          * STDOUT_FILENO was not saved earlier in startup, and that is to where
 490          * netcat expects output to be sent.  Since lighttpd expects connections
 491          * to be sockets, con->fd is where output is sent; separate fds are not
 492          * stored for input and output, but netcat has different fds for stdin
 493          * and * stdout.  To support netcat, would additionally need to avoid
 494          * S_ISSOCK(), getsockname(), and getpeername() below, reconstructing
 495          * addresses from environment variables:
 496          *   NCAT_LOCAL_ADDR   NCAT_LOCAL_PORT
 497          *   NCAT_REMOTE_ADDR  NCAT_REMOTE_PORT
 498          *   NCAT_PROTO
 499          */
 500         connection *con;
 501         server_socket *srv_socket;
 502         sock_addr cnt_addr;
 503         socklen_t cnt_len;
 504         struct stat st;
 505
 506         if (0 != fstat(fd, &st)) {
 507                 log_error_write(srv, __FILE__, __LINE__, "ss", "fstat:", strerror(errno));
 508                 return 0;
 509         }
 510
 511         if (!S_ISSOCK(st.st_mode)) {
 512                 /* require that fd is a socket
 513                  * (modules might expect STDIN_FILENO and STDOUT_FILENO opened to /dev/null) */
 514                 log_error_write(srv, __FILE__, __LINE__, "s", "lighttpd -1 stdin is not a socket");
 515                 return 0;
 516         }
 517
 518         cnt_len = sizeof(cnt_addr);
 519         if (0 != getsockname(fd, (struct sockaddr *)&cnt_addr, &cnt_len)) {
 520                 log_error_write(srv, __FILE__, __LINE__, "ss", "getsockname:", strerror(errno));
 521                 return 0;
 522         }
 523
 524         srv_socket = server_oneshot_getsock(srv, &cnt_addr);
 525         if (NULL == srv_socket) return 0;
 526
 527         cnt_len = sizeof(cnt_addr);
 528         if (0 != getpeername(fd, (struct sockaddr *)&cnt_addr, &cnt_len)) {
 529                 log_error_write(srv, __FILE__, __LINE__, "ss", "getpeername:", strerror(errno));
 530                 return 0;
 531         }
 532
 533         con = connection_accepted(srv, srv_socket, &cnt_addr, fd);
 534         if (NULL == con) return 0;
 535
 536         connection_state_machine(srv, con);
 537         return 1;
 538 }
 539
 540
 541 static void show_version (void) {
 542 #ifdef USE_OPENSSL
 543 # define TEXT_SSL " (ssl)"
 544 #else
 545 # define TEXT_SSL
 546 #endif
 547         char *b = PACKAGE_DESC TEXT_SSL \
 548 " - a light and fast webserver\n" \
 549 "Build-Date: " __DATE__ " " __TIME__ "\n";
 550 ;
 551 #undef TEXT_SSL
 552         write_all(STDOUT_FILENO, b, strlen(b));
 553 }
 554
 555 static void show_features (void) {
 556   const char features[] = ""
 557 #ifdef USE_SELECT
 558       "\t+ select (generic)\n"
 559 #else
 560       "\t- select (generic)\n"
 561 #endif
 562 #ifdef USE_POLL
 563       "\t+ poll (Unix)\n"
 564 #else
 565       "\t- poll (Unix)\n"
 566 #endif
 567 #ifdef USE_LINUX_SIGIO
 568       "\t+ rt-signals (Linux 2.4+)\n"
 569 #else
 570       "\t- rt-signals (Linux 2.4+)\n"
 571 #endif
 572 #ifdef USE_LINUX_EPOLL
 573       "\t+ epoll (Linux 2.6)\n"
 574 #else
 575       "\t- epoll (Linux 2.6)\n"
 576 #endif
 577 #ifdef USE_SOLARIS_DEVPOLL
 578       "\t+ /dev/poll (Solaris)\n"
 579 #else
 580       "\t- /dev/poll (Solaris)\n"
 581 #endif
 582 #ifdef USE_SOLARIS_PORT
 583       "\t+ eventports (Solaris)\n"
 584 #else
 585       "\t- eventports (Solaris)\n"
 586 #endif
 587 #ifdef USE_FREEBSD_KQUEUE
 588       "\t+ kqueue (FreeBSD)\n"
 589 #else
 590       "\t- kqueue (FreeBSD)\n"
 591 #endif
 592 #ifdef USE_LIBEV
 593       "\t+ libev (generic)\n"
 594 #else
 595       "\t- libev (generic)\n"
 596 #endif
 597       "\nNetwork handler:\n\n"
 598 #if defined USE_LINUX_SENDFILE
 599       "\t+ linux-sendfile\n"
 600 #else
 601       "\t- linux-sendfile\n"
 602 #endif
 603 #if defined USE_FREEBSD_SENDFILE
 604       "\t+ freebsd-sendfile\n"
 605 #else
 606       "\t- freebsd-sendfile\n"
 607 #endif
 608 #if defined USE_DARWIN_SENDFILE
 609       "\t+ darwin-sendfile\n"
 610 #else
 611       "\t- darwin-sendfile\n"
 612 #endif
 613 #if defined USE_SOLARIS_SENDFILEV
 614       "\t+ solaris-sendfilev\n"
 615 #else
 616       "\t- solaris-sendfilev\n"
 617 #endif
 618 #if defined USE_WRITEV
 619       "\t+ writev\n"
 620 #else
 621       "\t- writev\n"
 622 #endif
 623       "\t+ write\n"
 624 #ifdef USE_MMAP
 625       "\t+ mmap support\n"
 626 #else
 627       "\t- mmap support\n"
 628 #endif
 629       "\nFeatures:\n\n"
 630 #ifdef HAVE_IPV6
 631       "\t+ IPv6 support\n"
 632 #else
 633       "\t- IPv6 support\n"
 634 #endif
 635 #if defined HAVE_ZLIB_H && defined HAVE_LIBZ
 636       "\t+ zlib support\n"
 637 #else
 638       "\t- zlib support\n"
 639 #endif
 640 #if defined HAVE_BZLIB_H && defined HAVE_LIBBZ2
 641       "\t+ bzip2 support\n"
 642 #else
 643       "\t- bzip2 support\n"
 644 #endif
 645 #if defined(HAVE_CRYPT) || defined(HAVE_CRYPT_R) || defined(HAVE_LIBCRYPT)
 646       "\t+ crypt support\n"
 647 #else
 648       "\t- crypt support\n"
 649 #endif
 650 #ifdef USE_OPENSSL
 651       "\t+ SSL Support\n"
 652 #else
 653       "\t- SSL Support\n"
 654 #endif
 655 #ifdef HAVE_LIBPCRE
 656       "\t+ PCRE support\n"
 657 #else
 658       "\t- PCRE support\n"
 659 #endif
 660 #ifdef HAVE_MYSQL
 661       "\t+ mySQL support\n"
 662 #else
 663       "\t- mySQL support\n"
 664 #endif
 665 #if defined(HAVE_LDAP_H) && defined(HAVE_LBER_H) && defined(HAVE_LIBLDAP) && defined(HAVE_LIBLBER)
 666       "\t+ LDAP support\n"
 667 #else
 668       "\t- LDAP support\n"
 669 #endif
 670 #ifdef USE_MEMCACHED
 671       "\t+ memcached support\n"
 672 #else
 673       "\t- memcached support\n"
 674 #endif
 675 #ifdef HAVE_FAM_H
 676       "\t+ FAM support\n"
 677 #else
 678       "\t- FAM support\n"
 679 #endif
 680 #ifdef HAVE_LUA_H
 681       "\t+ LUA support\n"
 682 #else
 683       "\t- LUA support\n"
 684 #endif
 685 #ifdef HAVE_LIBXML_H
 686       "\t+ xml support\n"
 687 #else
 688       "\t- xml support\n"
 689 #endif
 690 #ifdef HAVE_SQLITE3_H
 691       "\t+ SQLite support\n"
 692 #else
 693       "\t- SQLite support\n"
 694 #endif
 695 #ifdef HAVE_GDBM_H
 696       "\t+ GDBM support\n"
 697 #else
 698       "\t- GDBM support\n"
 699 #endif
 700       "\n";
 701   show_version();
 702   printf("\nEvent Handlers:\n\n%s", features);
 703 }
 704
 705 static void show_help (void) {
 706 #ifdef USE_OPENSSL
 707 # define TEXT_SSL " (ssl)"
 708 #else
 709 # define TEXT_SSL
 710 #endif
 711         char *b = PACKAGE_DESC TEXT_SSL " ("__DATE__ " " __TIME__ ")" \
 712 " - a light and fast webserver\n" \
 713 "usage:\n" \
 714 " -f <name>  filename of the config-file\n" \
 715 " -m <name>  module directory (default: "LIBRARY_DIR")\n" \
 716 " -i <secs>  graceful shutdown after <secs> of inactivity\n" \
 717 " -1         process single (one) request on stdin socket, then exit\n" \
 718 " -p         print the parsed config-file in internal form, and exit\n" \
 719 " -t         test the config-file, and 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 = open(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                 fd_close_on_exec(pid_fd);
 949         }
 950
 951         if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
 952                 /* select limits itself
 953                  *
 954                  * as it is a hard limit and will lead to a segfault we add some safety
 955                  * */
 956                 srv->max_fds = FD_SETSIZE - 200;
 957         } else {
 958                 srv->max_fds = 4096;
 959         }
 960
 961         if (i_am_root) {
 962                 struct group *grp = NULL;
 963                 struct passwd *pwd = NULL;
 964                 int use_rlimit = 1;
 965
 966 #ifdef HAVE_VALGRIND_VALGRIND_H
 967                 if (RUNNING_ON_VALGRIND) use_rlimit = 0;
 968 #endif
 969
 970 #ifdef HAVE_GETRLIMIT
 971                 if (0 != getrlimit(RLIMIT_NOFILE, &rlim)) {
 972                         log_error_write(srv, __FILE__, __LINE__,
 973                                         "ss", "couldn't get 'max filedescriptors'",
 974                                         strerror(errno));
 975                         return -1;
 976                 }
 977
 978                 if (use_rlimit && srv->srvconf.max_fds) {
 979                         /* set rlimits */
 980
 981                         rlim.rlim_cur = srv->srvconf.max_fds;
 982                         rlim.rlim_max = srv->srvconf.max_fds;
 983
 984                         if (0 != setrlimit(RLIMIT_NOFILE, &rlim)) {
 985                                 log_error_write(srv, __FILE__, __LINE__,
 986                                                 "ss", "couldn't set 'max filedescriptors'",
 987                                                 strerror(errno));
 988                                 return -1;
 989                         }
 990                 }
 991
 992                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
 993                         srv->max_fds = rlim.rlim_cur < (rlim_t)FD_SETSIZE - 200 ? (int)rlim.rlim_cur : (int)FD_SETSIZE - 200;
 994                 } else {
 995                         srv->max_fds = rlim.rlim_cur;
 996                 }
 997
 998                 /* set core file rlimit, if enable_cores is set */
 999                 if (use_rlimit && srv->srvconf.enable_cores && getrlimit(RLIMIT_CORE, &rlim) == 0) {
1000                         rlim.rlim_cur = rlim.rlim_max;
1001                         setrlimit(RLIMIT_CORE, &rlim);
1002                 }
1003 #endif
1004                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
1005                         /* don't raise the limit above FD_SET_SIZE */
1006                         if (srv->max_fds > ((int)FD_SETSIZE) - 200) {
1007                                 log_error_write(srv, __FILE__, __LINE__, "sd",
1008                                                 "can't raise max filedescriptors above",  FD_SETSIZE - 200,
1009                                                 "if event-handler is 'select'. Use 'poll' or something else or reduce server.max-fds.");
1010                                 return -1;
1011                         }
1012                 }
1013
1014
1015 #ifdef HAVE_PWD_H
1016                 /* set user and group */
1017                 if (!buffer_string_is_empty(srv->srvconf.username)) {
1018                         if (NULL == (pwd = getpwnam(srv->srvconf.username->ptr))) {
1019                                 log_error_write(srv, __FILE__, __LINE__, "sb",
1020                                                 "can't find username", srv->srvconf.username);
1021                                 return -1;
1022                         }
1023
1024                         if (pwd->pw_uid == 0) {
1025                                 log_error_write(srv, __FILE__, __LINE__, "s",
1026                                                 "I will not set uid to 0\n");
1027                                 return -1;
1028                         }
1029                 }
1030
1031                 if (!buffer_string_is_empty(srv->srvconf.groupname)) {
1032                         if (NULL == (grp = getgrnam(srv->srvconf.groupname->ptr))) {
1033                                 log_error_write(srv, __FILE__, __LINE__, "sb",
1034                                         "can't find groupname", srv->srvconf.groupname);
1035                                 return -1;
1036                         }
1037                         if (grp->gr_gid == 0) {
1038                                 log_error_write(srv, __FILE__, __LINE__, "s",
1039                                                 "I will not set gid to 0\n");
1040                                 return -1;
1041                         }
1042                 }
1043 #endif
1044                 /* we need root-perms for port < 1024 */
1045                 if (0 != network_init(srv)) {
1046                         plugins_free(srv);
1047                         server_free(srv);
1048
1049                         return -1;
1050                 }
1051 #ifdef HAVE_PWD_H
1052                 /*
1053                  * Change group before chroot, when we have access
1054                  * to /etc/group
1055                  * */
1056                 if (NULL != grp) {
1057                         if (-1 == setgid(grp->gr_gid)) {
1058                                 log_error_write(srv, __FILE__, __LINE__, "ss", "setgid failed: ", strerror(errno));
1059                                 return -1;
1060                         }
1061                         if (-1 == setgroups(0, NULL)) {
1062                                 log_error_write(srv, __FILE__, __LINE__, "ss", "setgroups failed: ", strerror(errno));
1063                                 return -1;
1064                         }
1065                         if (!buffer_string_is_empty(srv->srvconf.username)) {
1066                                 initgroups(srv->srvconf.username->ptr, grp->gr_gid);
1067                         }
1068                 }
1069 #endif
1070 #ifdef HAVE_CHROOT
1071                 if (!buffer_string_is_empty(srv->srvconf.changeroot)) {
1072                         tzset();
1073
1074                         if (-1 == chroot(srv->srvconf.changeroot->ptr)) {
1075                                 log_error_write(srv, __FILE__, __LINE__, "ss", "chroot failed: ", strerror(errno));
1076                                 return -1;
1077                         }
1078                         if (-1 == chdir("/")) {
1079                                 log_error_write(srv, __FILE__, __LINE__, "ss", "chdir failed: ", strerror(errno));
1080                                 return -1;
1081                         }
1082                 }
1083 #endif
1084 #ifdef HAVE_PWD_H
1085                 /* drop root privs */
1086                 if (NULL != pwd) {
1087                         if (-1 == setuid(pwd->pw_uid)) {
1088                                 log_error_write(srv, __FILE__, __LINE__, "ss", "setuid failed: ", strerror(errno));
1089                                 return -1;
1090                         }
1091                 }
1092 #endif
1093 #if defined(HAVE_SYS_PRCTL_H) && defined(PR_SET_DUMPABLE)
1094                 /**
1095                  * on IRIX 6.5.30 they have prctl() but no DUMPABLE
1096                  */
1097                 if (srv->srvconf.enable_cores) {
1098                         prctl(PR_SET_DUMPABLE, 1, 0, 0, 0);
1099                 }
1100 #endif
1101         } else {
1102
1103 #ifdef HAVE_GETRLIMIT
1104                 if (0 != getrlimit(RLIMIT_NOFILE, &rlim)) {
1105                         log_error_write(srv, __FILE__, __LINE__,
1106                                         "ss", "couldn't get 'max filedescriptors'",
1107                                         strerror(errno));
1108                         return -1;
1109                 }
1110
1111                 /**
1112                  * we are not root can can't increase the fd-limit above rlim_max, but we can reduce it
1113                  */
1114                 if (srv->srvconf.max_fds && srv->srvconf.max_fds <= rlim.rlim_max) {
1115                         /* set rlimits */
1116
1117                         rlim.rlim_cur = srv->srvconf.max_fds;
1118
1119                         if (0 != setrlimit(RLIMIT_NOFILE, &rlim)) {
1120                                 log_error_write(srv, __FILE__, __LINE__,
1121                                                 "ss", "couldn't set 'max filedescriptors'",
1122                                                 strerror(errno));
1123                                 return -1;
1124                         }
1125                 }
1126
1127                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
1128                         srv->max_fds = rlim.rlim_cur < (rlim_t)FD_SETSIZE - 200 ? (int)rlim.rlim_cur : (int)FD_SETSIZE - 200;
1129                 } else {
1130                         srv->max_fds = rlim.rlim_cur;
1131                 }
1132
1133                 /* set core file rlimit, if enable_cores is set */
1134                 if (srv->srvconf.enable_cores && getrlimit(RLIMIT_CORE, &rlim) == 0) {
1135                         rlim.rlim_cur = rlim.rlim_max;
1136                         setrlimit(RLIMIT_CORE, &rlim);
1137                 }
1138
1139 #endif
1140                 if (srv->event_handler == FDEVENT_HANDLER_SELECT) {
1141                         /* don't raise the limit above FD_SET_SIZE */
1142                         if (srv->max_fds > ((int)FD_SETSIZE) - 200) {
1143                                 log_error_write(srv, __FILE__, __LINE__, "sd",
1144                                                 "can't raise max filedescriptors above",  FD_SETSIZE - 200,
1145                                                 "if event-handler is 'select'. Use 'poll' or something else or reduce server.max-fds.");
1146                                 return -1;
1147                         }
1148                 }
1149
1150                 if (0 != network_init(srv)) {
1151                         plugins_free(srv);
1152                         server_free(srv);
1153
1154                         return -1;
1155                 }
1156         }
1157
1158         /* set max-conns */
1159         if (srv->srvconf.max_conns > srv->max_fds/2) {
1160                 /* we can't have more connections than max-fds/2 */
1161                 log_error_write(srv, __FILE__, __LINE__, "sdd", "can't have more connections than fds/2: ", srv->srvconf.max_conns, srv->max_fds);
1162                 srv->max_conns = srv->max_fds/2;
1163         } else if (srv->srvconf.max_conns) {
1164                 /* otherwise respect the wishes of the user */
1165                 srv->max_conns = srv->srvconf.max_conns;
1166         } else {
1167                 /* or use the default: we really don't want to hit max-fds */
1168                 srv->max_conns = srv->max_fds/3;
1169         }
1170
1171         if (HANDLER_GO_ON != plugins_call_init(srv)) {
1172                 log_error_write(srv, __FILE__, __LINE__, "s", "Initialization of plugins failed. Going down.");
1173
1174                 plugins_free(srv);
1175                 network_close(srv);
1176                 server_free(srv);
1177
1178                 return -1;
1179         }
1180
1181 #ifdef HAVE_FORK
1182         /* network is up, let's deamonize ourself */
1183         if (srv->srvconf.dont_daemonize == 0) {
1184                 parent_pipe_fd = daemonize();
1185         }
1186 #endif
1187
1188
1189 #ifdef HAVE_SIGACTION
1190         memset(&act, 0, sizeof(act));
1191         act.sa_handler = SIG_IGN;
1192         sigaction(SIGPIPE, &act, NULL);
1193         sigaction(SIGUSR1, &act, NULL);
1194 # if defined(SA_SIGINFO)
1195         act.sa_sigaction = sigaction_handler;
1196         sigemptyset(&act.sa_mask);
1197         act.sa_flags = SA_SIGINFO;
1198 # else
1199         act.sa_handler = signal_handler;
1200         sigemptyset(&act.sa_mask);
1201         act.sa_flags = 0;
1202 # endif
1203         sigaction(SIGINT,  &act, NULL);
1204         sigaction(SIGTERM, &act, NULL);
1205         sigaction(SIGHUP,  &act, NULL);
1206         sigaction(SIGALRM, &act, NULL);
1207
1208         /* it should be safe to restart syscalls after SIGCHLD */
1209         act.sa_flags |= SA_RESTART | SA_NOCLDSTOP;
1210         sigaction(SIGCHLD, &act, NULL);
1211
1212 #elif defined(HAVE_SIGNAL)
1213         /* ignore the SIGPIPE from sendfile() */
1214         signal(SIGPIPE, SIG_IGN);
1215         signal(SIGUSR1, SIG_IGN);
1216         signal(SIGALRM, signal_handler);
1217         signal(SIGTERM, signal_handler);
1218         signal(SIGHUP,  signal_handler);
1219         signal(SIGCHLD,  signal_handler);
1220         signal(SIGINT,  signal_handler);
1221 #endif
1222
1223 #ifdef USE_ALARM
1224         signal(SIGALRM, signal_handler);
1225
1226         /* setup periodic timer (1 second) */
1227         if (setitimer(ITIMER_REAL, &interval, NULL)) {
1228                 log_error_write(srv, __FILE__, __LINE__, "s", "setting timer failed");
1229                 return -1;
1230         }
1231
1232         getitimer(ITIMER_REAL, &interval);
1233 #endif
1234
1235
1236         srv->gid = getgid();
1237         srv->uid = getuid();
1238
1239         /* write pid file */
1240         if (pid_fd != -1) {
1241                 buffer_copy_int(srv->tmp_buf, getpid());
1242                 buffer_append_string_len(srv->tmp_buf, CONST_STR_LEN("\n"));
1243                 if (-1 == write_all(pid_fd, CONST_BUF_LEN(srv->tmp_buf))) {
1244                         log_error_write(srv, __FILE__, __LINE__, "ss", "Couldn't write pid file:", strerror(errno));
1245                         close(pid_fd);
1246                         return -1;
1247                 }
1248         }
1249
1250         /* Close stderr ASAP in the child process to make sure that nothing
1251          * is being written to that fd which may not be valid anymore. */
1252         if (!srv->srvconf.preflight_check && -1 == log_error_open(srv)) {
1253                 log_error_write(srv, __FILE__, __LINE__, "s", "Opening errorlog failed. Going down.");
1254
1255                 plugins_free(srv);
1256                 network_close(srv);
1257                 server_free(srv);
1258                 return -1;
1259         }
1260
1261         if (HANDLER_GO_ON != plugins_call_set_defaults(srv)) {
1262                 log_error_write(srv, __FILE__, __LINE__, "s", "Configuration of plugins failed. Going down.");
1263
1264                 plugins_free(srv);
1265                 network_close(srv);
1266                 server_free(srv);
1267
1268                 return -1;
1269         }
1270
1271         /* dump unused config-keys */
1272         for (i = 0; i < srv->config_context->used; i++) {
1273                 array *config = ((data_config *)srv->config_context->data[i])->value;
1274                 size_t j;
1275
1276                 for (j = 0; config && j < config->used; j++) {
1277                         data_unset *du = config->data[j];
1278
1279                         /* all var.* is known as user defined variable */
1280                         if (strncmp(du->key->ptr, "var.", sizeof("var.") - 1) == 0) {
1281                                 continue;
1282                         }
1283
1284                         if (NULL == array_get_element(srv->config_touched, du->key->ptr)) {
1285                                 log_error_write(srv, __FILE__, __LINE__, "sbs",
1286                                                 "WARNING: unknown config-key:",
1287                                                 du->key,
1288                                                 "(ignored)");
1289                         }
1290                 }
1291         }
1292
1293         if (srv->config_unsupported) {
1294                 log_error_write(srv, __FILE__, __LINE__, "s",
1295                                 "Configuration contains unsupported keys. Going down.");
1296         }
1297
1298         if (srv->config_deprecated) {
1299                 log_error_write(srv, __FILE__, __LINE__, "s",
1300                                 "Configuration contains deprecated keys. Going down.");
1301         }
1302
1303         if (srv->config_unsupported || srv->config_deprecated) {
1304                 plugins_free(srv);
1305                 network_close(srv);
1306                 server_free(srv);
1307
1308                 return -1;
1309         }
1310
1311         if (srv->srvconf.preflight_check) {
1312                 /*printf("Preflight OK");*//*(stdout reopened to /dev/null)*/
1313                 plugins_free(srv);
1314                 network_close(srv);
1315                 server_free(srv);
1316
1317                 exit(0);
1318         }
1319
1320
1321 #ifdef HAVE_FORK
1322         /**
1323          * notify daemonize-grandparent of successful startup
1324          * do this before any further forking is done (workers)
1325          */
1326         if (srv->srvconf.dont_daemonize == 0) {
1327                 if (0 > write(parent_pipe_fd, "", 1)) return -1;
1328                 close(parent_pipe_fd);
1329         }
1330
1331         if (idle_limit && srv->srvconf.max_worker) {
1332                 srv->srvconf.max_worker = 0;
1333                 log_error_write(srv, __FILE__, __LINE__, "s",
1334                                 "server idle time limit command line option disables server.max-worker config file option.");
1335         }
1336
1337         /* start watcher and workers */
1338         num_childs = srv->srvconf.max_worker;
1339         if (num_childs > 0) {
1340                 int child = 0;
1341                 while (!child && !srv_shutdown && !graceful_shutdown) {
1342                         if (num_childs > 0) {
1343                                 switch (fork()) {
1344                                 case -1:
1345                                         return -1;
1346                                 case 0:
1347                                         child = 1;
1348                                         break;
1349                                 default:
1350                                         num_childs--;
1351                                         break;
1352                                 }
1353                         } else {
1354                                 int status;
1355
1356                                 if (-1 != wait(&status)) {
1357                                         /**
1358                                          * one of our workers went away
1359                                          */
1360                                         num_childs++;
1361                                 } else {
1362                                         switch (errno) {
1363                                         case EINTR:
1364                                                 /**
1365                                                  * if we receive a SIGHUP we have to close our logs ourself as we don't
1366                                                  * have the mainloop who can help us here
1367                                                  */
1368                                                 if (handle_sig_hup) {
1369                                                         handle_sig_hup = 0;
1370
1371                                                         log_error_cycle(srv);
1372
1373                                                         /**
1374                                                          * forward to all procs in the process-group
1375                                                          *
1376                                                          * we also send it ourself
1377                                                          */
1378                                                         if (!forwarded_sig_hup && 0 != srv->srvconf.max_worker) {
1379                                                                 forwarded_sig_hup = 1;
1380                                                                 kill(0, SIGHUP);
1381                                                         }
1382                                                 }
1383                                                 break;
1384                                         default:
1385                                                 break;
1386                                         }
1387                                 }
1388                         }
1389                 }
1390
1391                 /**
1392                  * for the parent this is the exit-point
1393                  */
1394                 if (!child) {
1395                         /**
1396                          * kill all children too
1397                          */
1398                         if (graceful_shutdown) {
1399                                 kill(0, SIGINT);
1400                         } else if (srv_shutdown) {
1401                                 kill(0, SIGTERM);
1402                         }
1403
1404                         remove_pid_file(srv, &pid_fd);
1405                         log_error_close(srv);
1406                         network_close(srv);
1407                         connections_free(srv);
1408                         plugins_free(srv);
1409                         server_free(srv);
1410                         return 0;
1411                 }
1412
1413                 /**
1414                  * make sure workers do not muck with pid-file
1415                  */
1416                 if (0 <= pid_fd) {
1417                         close(pid_fd);
1418                         pid_fd = -1;
1419                 }
1420                 buffer_reset(srv->srvconf.pid_file);
1421         }
1422 #endif
1423
1424         if (NULL == (srv->ev = fdevent_init(srv, srv->max_fds + 1, srv->event_handler))) {
1425                 log_error_write(srv, __FILE__, __LINE__,
1426                                 "s", "fdevent_init failed");
1427                 return -1;
1428         }
1429
1430         /* libev backend overwrites our SIGCHLD handler and calls waitpid on SIGCHLD; we want our own SIGCHLD handling. */
1431 #ifdef HAVE_SIGACTION
1432         sigaction(SIGCHLD, &act, NULL);
1433 #elif defined(HAVE_SIGNAL)
1434         signal(SIGCHLD,  signal_handler);
1435 #endif
1436
1437         /*
1438          * kqueue() is called here, select resets its internals,
1439          * all server sockets get their handlers
1440          *
1441          * */
1442         if (0 != network_register_fdevents(srv)) {
1443                 plugins_free(srv);
1444                 network_close(srv);
1445                 server_free(srv);
1446
1447                 return -1;
1448         }
1449
1450         /* might fail if user is using fam (not gamin) and famd isn't running */
1451         if (NULL == (srv->stat_cache = stat_cache_init())) {
1452                 log_error_write(srv, __FILE__, __LINE__, "s",
1453                         "stat-cache could not be setup, dieing.");
1454                 return -1;
1455         }
1456
1457 #ifdef HAVE_FAM_H
1458         /* setup FAM */
1459         if (srv->srvconf.stat_cache_engine == STAT_CACHE_ENGINE_FAM) {
1460                 if (0 != FAMOpen2(&srv->stat_cache->fam, "lighttpd")) {
1461                         log_error_write(srv, __FILE__, __LINE__, "s",
1462                                          "could not open a fam connection, dieing.");
1463                         return -1;
1464                 }
1465 #ifdef HAVE_FAMNOEXISTS
1466                 FAMNoExists(&srv->stat_cache->fam);
1467 #endif
1468
1469                 fdevent_register(srv->ev, FAMCONNECTION_GETFD(&srv->stat_cache->fam), stat_cache_handle_fdevent, NULL);
1470                 fdevent_event_set(srv->ev, &(srv->stat_cache->fam_fcce_ndx), FAMCONNECTION_GETFD(&srv->stat_cache->fam), FDEVENT_IN);
1471         }
1472 #endif
1473
1474
1475         /* get the current number of FDs */
1476         srv->cur_fds = open("/dev/null", O_RDONLY);
1477         close(srv->cur_fds);
1478
1479         for (i = 0; i < srv->srv_sockets.used; i++) {
1480                 server_socket *srv_socket = srv->srv_sockets.ptr[i];
1481                 if (srv->sockets_disabled) continue; /* lighttpd -1 (one-shot mode) */
1482                 if (-1 == fdevent_fcntl_set(srv->ev, srv_socket->fd)) {
1483                         log_error_write(srv, __FILE__, __LINE__, "ss", "fcntl failed:", strerror(errno));
1484                         return -1;
1485                 }
1486         }
1487
1488         if (oneshot_fd && server_oneshot_init(srv, oneshot_fd)) {
1489                 oneshot_fd = -1;
1490         }
1491
1492         /* main-loop */
1493         while (!srv_shutdown) {
1494                 int n;
1495                 size_t ndx;
1496                 time_t min_ts;
1497
1498                 if (handle_sig_hup) {
1499                         handler_t r;
1500
1501                         /* reset notification */
1502                         handle_sig_hup = 0;
1503
1504
1505                         /* cycle logfiles */
1506
1507                         switch(r = plugins_call_handle_sighup(srv)) {
1508                         case HANDLER_GO_ON:
1509                                 break;
1510                         default:
1511                                 log_error_write(srv, __FILE__, __LINE__, "sd", "sighup-handler return with an error", r);
1512                                 break;
1513                         }
1514
1515                         if (-1 == log_error_cycle(srv)) {
1516                                 log_error_write(srv, __FILE__, __LINE__, "s", "cycling errorlog failed, dying");
1517
1518                                 return -1;
1519                         } else {
1520 #ifdef HAVE_SIGACTION
1521                                 log_error_write(srv, __FILE__, __LINE__, "sdsd",
1522                                         "logfiles cycled UID =",
1523                                         last_sighup_info.si_uid,
1524                                         "PID =",
1525                                         last_sighup_info.si_pid);
1526 #else
1527                                 log_error_write(srv, __FILE__, __LINE__, "s",
1528                                         "logfiles cycled");
1529 #endif
1530                         }
1531                 }
1532
1533                 if (handle_sig_alarm) {
1534                         /* a new second */
1535
1536 #ifdef USE_ALARM
1537                         /* reset notification */
1538                         handle_sig_alarm = 0;
1539 #endif
1540
1541                         /* get current time */
1542                         min_ts = time(NULL);
1543
1544                         if (min_ts != srv->cur_ts) {
1545 #ifdef DEBUG_CONNECTION_STATES
1546                                 int cs = 0;
1547 #endif
1548                                 connections *conns = srv->conns;
1549                                 handler_t r;
1550
1551                                 switch(r = plugins_call_handle_trigger(srv)) {
1552                                 case HANDLER_GO_ON:
1553                                         break;
1554                                 case HANDLER_ERROR:
1555                                         log_error_write(srv, __FILE__, __LINE__, "s", "one of the triggers failed");
1556                                         break;
1557                                 default:
1558                                         log_error_write(srv, __FILE__, __LINE__, "d", r);
1559                                         break;
1560                                 }
1561
1562                                 /* trigger waitpid */
1563                                 srv->cur_ts = min_ts;
1564
1565                                 /* check idle time limit, if enabled */
1566                                 if (idle_limit && idle_limit < min_ts - last_active_ts && !graceful_shutdown) {
1567                                         log_error_write(srv, __FILE__, __LINE__, "sDs", "[note] idle timeout", (int)idle_limit,
1568                                                         "s exceeded, initiating graceful shutdown");
1569                                         graceful_shutdown = 2; /* value 2 indicates idle timeout */
1570                                 }
1571
1572                                 /* cleanup stat-cache */
1573                                 stat_cache_trigger_cleanup(srv);
1574                                 /**
1575                                  * check all connections for timeouts
1576                                  *
1577                                  */
1578                                 for (ndx = 0; ndx < conns->used; ndx++) {
1579                                         connection * const con = conns->ptr[ndx];
1580                                         const int waitevents = fdevent_event_get_interest(srv->ev, con->fd);
1581                                         int changed = 0;
1582                                         int t_diff;
1583
1584                                         if (waitevents & FDEVENT_IN) {
1585                                                 if (con->request_count == 1 || con->state != CON_STATE_READ) { /* e.g. CON_STATE_READ_POST || CON_STATE_WRITE */
1586                                                         if (srv->cur_ts - con->read_idle_ts > con->conf.max_read_idle) {
1587                                                                 /* time - out */
1588                                                                 if (con->conf.log_request_handling) {
1589                                                                         log_error_write(srv, __FILE__, __LINE__, "sd",
1590                                                                                 "connection closed - read timeout:", con->fd);
1591                                                                 }
1592
1593                                                                 connection_set_state(srv, con, CON_STATE_ERROR);
1594                                                                 changed = 1;
1595                                                         }
1596                                                 } else {
1597                                                         if (srv->cur_ts - con->read_idle_ts > con->keep_alive_idle) {
1598                                                                 /* time - out */
1599                                                                 if (con->conf.log_request_handling) {
1600                                                                         log_error_write(srv, __FILE__, __LINE__, "sd",
1601                                                                                 "connection closed - keep-alive timeout:", con->fd);
1602                                                                 }
1603
1604                                                                 connection_set_state(srv, con, CON_STATE_ERROR);
1605                                                                 changed = 1;
1606                                                         }
1607                                                 }
1608                                         }
1609
1610                                         /* max_write_idle timeout currently functions as backend timeout,
1611                                          * too, after response has been started.
1612                                          * future: have separate backend timeout, and then change this
1613                                          * to check for write interest before checking for timeout */
1614                                         /*if (waitevents & FDEVENT_OUT)*/
1615                                         if ((con->state == CON_STATE_WRITE) &&
1616                                             (con->write_request_ts != 0)) {
1617 #if 0
1618                                                 if (srv->cur_ts - con->write_request_ts > 60) {
1619                                                         log_error_write(srv, __FILE__, __LINE__, "sdd",
1620                                                                         "connection closed - pre-write-request-timeout:", con->fd, srv->cur_ts - con->write_request_ts);
1621                                                 }
1622 #endif
1623
1624                                                 if (srv->cur_ts - con->write_request_ts > con->conf.max_write_idle) {
1625                                                         /* time - out */
1626                                                         if (con->conf.log_timeouts) {
1627                                                                 log_error_write(srv, __FILE__, __LINE__, "sbsbsosds",
1628                                                                         "NOTE: a request from",
1629                                                                         con->dst_addr_buf,
1630                                                                         "for",
1631                                                                         con->request.uri,
1632                                                                         "timed out after writing",
1633                                                                         con->bytes_written,
1634                                                                         "bytes. We waited",
1635                                                                         (int)con->conf.max_write_idle,
1636                                                                         "seconds. If this a problem increase server.max-write-idle");
1637                                                         }
1638                                                         connection_set_state(srv, con, CON_STATE_ERROR);
1639                                                         changed = 1;
1640                                                 }
1641                                         }
1642
1643                                         if (con->state == CON_STATE_CLOSE && (srv->cur_ts - con->close_timeout_ts > HTTP_LINGER_TIMEOUT)) {
1644                                                 changed = 1;
1645                                         }
1646
1647                                         /* we don't like div by zero */
1648                                         if (0 == (t_diff = srv->cur_ts - con->connection_start)) t_diff = 1;
1649
1650                                         if (con->traffic_limit_reached &&
1651                                             (con->conf.kbytes_per_second == 0 ||
1652                                              ((con->bytes_written / t_diff) < con->conf.kbytes_per_second * 1024))) {
1653                                                 /* enable connection again */
1654                                                 con->traffic_limit_reached = 0;
1655
1656                                                 changed = 1;
1657                                         }
1658
1659                                         if (changed) {
1660                                                 connection_state_machine(srv, con);
1661                                         }
1662                                         con->bytes_written_cur_second = 0;
1663                                         *(con->conf.global_bytes_per_second_cnt_ptr) = 0;
1664
1665 #if DEBUG_CONNECTION_STATES
1666                                         if (cs == 0) {
1667                                                 fprintf(stderr, "connection-state: ");
1668                                                 cs = 1;
1669                                         }
1670
1671                                         fprintf(stderr, "c[%d,%d]: %s ",
1672                                                 con->fd,
1673                                                 con->fcgi.fd,
1674                                                 connection_get_state(con->state));
1675 #endif
1676                                 }
1677
1678 #ifdef DEBUG_CONNECTION_STATES
1679                                 if (cs == 1) fprintf(stderr, "\n");
1680 #endif
1681                         }
1682                 }
1683
1684                 if (srv->sockets_disabled) {
1685                         /* our server sockets are disabled, why ? */
1686
1687                         if ((srv->cur_fds + srv->want_fds < srv->max_fds * 8 / 10) && /* we have enough unused fds */
1688                             (srv->conns->used <= srv->max_conns * 9 / 10) &&
1689                             (0 == graceful_shutdown)) {
1690                                 for (i = 0; i < srv->srv_sockets.used; i++) {
1691                                         server_socket *srv_socket = srv->srv_sockets.ptr[i];
1692                                         fdevent_event_set(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd, FDEVENT_IN);
1693                                 }
1694
1695                                 log_error_write(srv, __FILE__, __LINE__, "s", "[note] sockets enabled again");
1696
1697                                 srv->sockets_disabled = 0;
1698                         }
1699                 } else {
1700                         if ((srv->cur_fds + srv->want_fds > srv->max_fds * 9 / 10) || /* out of fds */
1701                             (srv->conns->used >= srv->max_conns) || /* out of connections */
1702                             (graceful_shutdown)) { /* graceful_shutdown */
1703
1704                                 /* disable server-fds */
1705
1706                                 for (i = 0; i < srv->srv_sockets.used; i++) {
1707                                         server_socket *srv_socket = srv->srv_sockets.ptr[i];
1708
1709                                         if (graceful_shutdown) {
1710                                                 /* we don't want this socket anymore,
1711                                                  *
1712                                                  * closing it right away will make it possible for
1713                                                  * the next lighttpd to take over (graceful restart)
1714                                                  *  */
1715
1716                                                 fdevent_event_del(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd);
1717                                                 fdevent_unregister(srv->ev, srv_socket->fd);
1718                                                 close(srv_socket->fd);
1719                                                 srv_socket->fd = -1;
1720
1721                                                 /* network_close() will cleanup after us */
1722                                         } else {
1723                                                 fdevent_event_set(srv->ev, &(srv_socket->fde_ndx), srv_socket->fd, 0);
1724                                         }
1725                                 }
1726
1727                                 if (graceful_shutdown) {
1728                                         remove_pid_file(srv, &pid_fd);
1729                                         log_error_write(srv, __FILE__, __LINE__, "s", "[note] graceful shutdown started");
1730                                 } else if (srv->conns->used >= srv->max_conns) {
1731                                         log_error_write(srv, __FILE__, __LINE__, "s", "[note] sockets disabled, connection limit reached");
1732                                 } else {
1733                                         log_error_write(srv, __FILE__, __LINE__, "s", "[note] sockets disabled, out-of-fds");
1734                                 }
1735
1736                                 srv->sockets_disabled = 1;
1737                         }
1738                 }
1739
1740                 if (graceful_shutdown && srv->conns->used == 0) {
1741                         /* we are in graceful shutdown phase and all connections are closed
1742                          * we are ready to terminate without harming anyone */
1743                         srv_shutdown = 1;
1744                 }
1745
1746                 /* we still have some fds to share */
1747                 if (srv->want_fds) {
1748                         /* check the fdwaitqueue for waiting fds */
1749                         int free_fds = srv->max_fds - srv->cur_fds - 16;
1750                         connection *con;
1751
1752                         for (; free_fds > 0 && NULL != (con = fdwaitqueue_unshift(srv, srv->fdwaitqueue)); free_fds--) {
1753                                 connection_state_machine(srv, con);
1754
1755                                 srv->want_fds--;
1756                         }
1757                 }
1758
1759                 if ((n = fdevent_poll(srv->ev, 1000)) > 0) {
1760                         /* n is the number of events */
1761                         int revents;
1762                         int fd_ndx;
1763 #if 0
1764                         if (n > 0) {
1765                                 log_error_write(srv, __FILE__, __LINE__, "sd",
1766                                                 "polls:", n);
1767                         }
1768 #endif
1769                         last_active_ts = srv->cur_ts;
1770                         fd_ndx = -1;
1771                         do {
1772                                 fdevent_handler handler;
1773                                 void *context;
1774                                 handler_t r;
1775
1776                                 fd_ndx  = fdevent_event_next_fdndx (srv->ev, fd_ndx);
1777                                 if (-1 == fd_ndx) break; /* not all fdevent handlers know how many fds got an event */
1778
1779                                 revents = fdevent_event_get_revent (srv->ev, fd_ndx);
1780                                 fd      = fdevent_event_get_fd     (srv->ev, fd_ndx);
1781                                 handler = fdevent_get_handler(srv->ev, fd);
1782                                 context = fdevent_get_context(srv->ev, fd);
1783
1784 #if 0
1785                                 log_error_write(srv, __FILE__, __LINE__, "sdd",
1786                                                 "event for", fd, revents);
1787 #endif
1788                                 switch (r = (*handler)(srv, context, revents)) {
1789                                 case HANDLER_FINISHED:
1790                                 case HANDLER_GO_ON:
1791                                 case HANDLER_WAIT_FOR_EVENT:
1792                                 case HANDLER_WAIT_FOR_FD:
1793                                         break;
1794                                 case HANDLER_ERROR:
1795                                         /* should never happen */
1796                                         SEGFAULT();
1797                                         break;
1798                                 default:
1799                                         log_error_write(srv, __FILE__, __LINE__, "d", r);
1800                                         break;
1801                                 }
1802                         } while (--n > 0);
1803                 } else if (n < 0 && errno != EINTR) {
1804                         log_error_write(srv, __FILE__, __LINE__, "ss",
1805                                         "fdevent_poll failed:",
1806                                         strerror(errno));
1807                 }
1808
1809                 for (ndx = 0; ndx < srv->joblist->used; ndx++) {
1810                         connection *con = srv->joblist->ptr[ndx];
1811                         connection_state_machine(srv, con);
1812                         con->in_joblist = 0;
1813                 }
1814
1815                 srv->joblist->used = 0;
1816         }
1817
1818         if (0 == graceful_shutdown) {
1819                 remove_pid_file(srv, &pid_fd);
1820         }
1821
1822         if (2 == graceful_shutdown) { /* value 2 indicates idle timeout */
1823                 log_error_write(srv, __FILE__, __LINE__, "s",
1824                                 "server stopped after idle timeout");
1825         } else {
1826 #ifdef HAVE_SIGACTION
1827                 log_error_write(srv, __FILE__, __LINE__, "sdsd",
1828                                 "server stopped by UID =",
1829                                 last_sigterm_info.si_uid,
1830                                 "PID =",
1831                                 last_sigterm_info.si_pid);
1832 #else
1833                 log_error_write(srv, __FILE__, __LINE__, "s",
1834                                 "server stopped");
1835 #endif
1836         }
1837
1838         /* clean-up */
1839         log_error_close(srv);
1840         network_close(srv);
1841         connections_free(srv);
1842         plugins_free(srv);
1843         server_free(srv);
1844
1845         return 0;
1846 }