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