main.c 17.3 KB
Newer Older
1 2 3 4 5
/* Icecast
 *
 * This program is distributed under the GNU General Public License, version 2.
 * A copy of this license is included with this source.
 *
6
 * Copyright 2000-2004, Jack Moffitt <jack@xiph.org,
7 8
 *                      Michael Smith <msmith@xiph.org>,
 *                      oddsock <oddsock@xiph.org>,
9
 *                      Karl Heyes <karl@xiph.org>,
10
 *                      and others (see AUTHORS for details).
11
 * Copyright 2011-2018, Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>,
12
 * Copyright 2014,      Thomas B. Ruecker <thomas@ruecker.fi>.
13 14
 */

15
/* -*- c-basic-offset: 4; indent-tabs-mode: nil; -*- */
16 17 18 19
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

Jack Moffitt's avatar
Jack Moffitt committed
20 21
#include <stdio.h>
#include <string.h>
22 23
#include <errno.h>

24
#ifdef HAVE_CURL
25
#include "curl.h"
26 27
#endif

28
#ifdef WIN32
29
#ifndef _WIN32_WINNT
30
#define _WIN32_WINNT 0x0400
31
#endif
32 33 34 35 36 37
/* For getpid() */
#include <process.h>
#include <windows.h>
#define snprintf _snprintf
#define getpid _getpid
#endif
Jack Moffitt's avatar
Jack Moffitt committed
38

39 40 41 42
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

43 44 45 46
#ifdef HAVE_UNAME
#include <sys/utsname.h>
#endif

Marvin Scholz's avatar
Marvin Scholz committed
47 48 49 50 51
#include "common/thread/thread.h"
#include "common/avl/avl.h"
#include "common/net/sock.h"
#include "common/net/resolver.h"
#include "common/httpp/httpp.h"
Jack Moffitt's avatar
Jack Moffitt committed
52

53
#if HAVE_SYS_TYPES_H
54
#include <sys/types.h>
55 56
#endif
#if HAVE_GRP_H
57
#include <grp.h>
58 59
#endif
#if HAVE_PWD_H
60 61
#include <pwd.h>
#endif
Jack Moffitt's avatar
Jack Moffitt committed
62

63
#include "cfgfile.h"
64
#include "util.h"
Jack Moffitt's avatar
Jack Moffitt committed
65 66 67
#include "sighandler.h"

#include "global.h"
68
#include "compat.h"
Jack Moffitt's avatar
Jack Moffitt committed
69 70 71
#include "connection.h"
#include "refbuf.h"
#include "client.h"
72
#include "slave.h"
Jack Moffitt's avatar
Jack Moffitt committed
73 74
#include "stats.h"
#include "logging.h"
75
#include "xslt.h"
76
#include "fserve.h"
77
#include "yp.h"
78
#include "auth.h"
79
#include "event.h"
Jack Moffitt's avatar
Jack Moffitt committed
80

81 82
#include <libxml/xmlmemory.h>

Jack Moffitt's avatar
Jack Moffitt committed
83 84 85
#undef CATMODULE
#define CATMODULE "main"

86 87 88
static int background;
static char *pidfile = NULL;

89
static void _fatal_error(const char *perr)
90
{
91 92 93
#ifdef WIN32_SERVICE
    MessageBox(NULL, perr, "Error", MB_SERVICE_NOTIFICATION);
#elif defined(WIN32)
94 95 96 97 98 99
    MessageBox(NULL, perr, "Error", MB_OK);
#else
    fprintf(stdout, "%s\n", perr);
#endif
}

100
static void _print_usage(void)
Jack Moffitt's avatar
Jack Moffitt committed
101
{
102
    printf("%s\n\n", ICECAST_VERSION_STRING);
103 104
    printf("usage: icecast [-b] -c <file>\n");
    printf("or   : icecast {-v|--version}\n");
105
    printf("options:\n");
106 107 108
    printf("\t-c <file>       Specify configuration file\n");
    printf("\t-v or --version Display version info\n");
    printf("\t-b              Run icecast in the background\n");
109
    printf("\n");
Jack Moffitt's avatar
Jack Moffitt committed
110 111
}

112 113
static void _stop_logging(void)
{
114 115
    log_close(errorlog);
    log_close(accesslog);
116
    log_close(playlistlog);
117 118
}

119
static void initialize_subsystems(void)
Jack Moffitt's avatar
Jack Moffitt committed
120
{
121 122 123 124 125
    log_initialize();
    thread_initialize();
    sock_initialize();
    resolver_initialize();
    config_initialize();
126
    tls_initialize();
127 128 129
    connection_initialize();
    global_initialize();
    refbuf_initialize();
130

131
    xslt_initialize();
132 133
#ifdef HAVE_CURL
    icecast_curl_initialize();
134
#endif
Jack Moffitt's avatar
Jack Moffitt committed
135 136
}

137
static void shutdown_subsystems(void)
Jack Moffitt's avatar
Jack Moffitt committed
138
{
139
    event_shutdown();
140
    fserve_shutdown();
141 142
    refbuf_shutdown();
    slave_shutdown();
143
    auth_shutdown();
144
    yp_shutdown();
145
    stats_shutdown();
146

147 148
    global_shutdown();
    connection_shutdown();
149
    tls_shutdown();
150 151 152 153
    config_shutdown();
    resolver_shutdown();
    sock_shutdown();
    thread_shutdown();
154

155
#ifdef HAVE_CURL
156
    icecast_curl_shutdown();
157 158
#endif

159 160
    /* Now that these are done, we can stop the loggers. */
    _stop_logging();
161
    log_shutdown();
162
    xslt_shutdown();
Jack Moffitt's avatar
Jack Moffitt committed
163 164
}

Philipp Schafft's avatar
Philipp Schafft committed
165
static int _parse_config_opts(int argc, char **argv, char *filename, size_t size)
Jack Moffitt's avatar
Jack Moffitt committed
166
{
167
    int i = 1;
168 169
    int config_ok = 0;

170
    background = 0;
171 172
    if (argc < 2) {
        if (filename[0] != 0) {
173
            /* We have a default filename, so we can work with no options. */
174 175
            return 1;
        } else {
176
            /* We need at least a config filename. */
177 178 179
            return -1;
        }
    }
Jack Moffitt's avatar
Jack Moffitt committed
180

181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199
    while (i < argc) {
        if (strcmp(argv[i], "-b") == 0) {
#ifndef WIN32
            pid_t pid;
            fprintf(stdout, "Starting icecast2\nDetaching from the console\n");

            pid = fork();

            if (pid > 0) {
                /* exit the parent */
                exit(0);
            }
            else if(pid < 0) {
                fprintf(stderr, "FATAL: Unable to fork child!");
                exit(1);
            }
            background = 1;
#endif
        }
200
        if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--version") == 0) {
201
            fprintf(stdout, "%s\n", ICECAST_VERSION_STRING);
202 203 204
            exit(0);
        }

205 206 207
        if (strcmp(argv[i], "-c") == 0) {
            if (i + 1 < argc) {
                strncpy(filename, argv[i + 1], size-1);
208
                filename[size-1] = 0;
209
                config_ok = 1;
210 211 212 213
            } else {
                return -1;
            }
        }
214
        i++;
215 216
    }

217 218 219 220
    if(config_ok)
        return 1;
    else
        return -1;
Jack Moffitt's avatar
Jack Moffitt committed
221 222
}

223 224 225 226 227
static int _start_logging_stdout(void) {
    errorlog = log_open_file(stderr);
    if ( errorlog < 0 )
        return 0;

228
    log_set_level(errorlog, ICECAST_LOGLEVEL_WARN);
229 230 231 232

    return 1;
}

233
static int _start_logging(void)
Jack Moffitt's avatar
Jack Moffitt committed
234
{
235 236
    char fn_error[FILENAME_MAX];
    char fn_access[FILENAME_MAX];
237
    char fn_playlist[FILENAME_MAX];
238
    char buf[1024];
239
    int log_to_stderr;
240

241
    ice_config_t *config = config_get_config_unlocked();
Jack Moffitt's avatar
Jack Moffitt committed
242

243 244 245
    if(strcmp(config->error_log, "-") == 0) {
        /* this is already in place because of _start_logging_stdout() */
    } else {
246
        snprintf(fn_error, FILENAME_MAX, "%s%s%s", config->log_dir, PATH_SEPARATOR, config->error_log);
247
        errorlog = log_open(fn_error);
248
        log_to_stderr = 0;
249 250 251
        if (config->logsize)
            log_set_trigger (errorlog, config->logsize);
        log_set_archive_timestamp(errorlog, config->logarchive);
252
    }
253 254 255

    if (errorlog < 0) {
        buf[sizeof(buf)-1] = 0;
256
        snprintf(buf, sizeof(buf)-1,
257 258
                "FATAL: could not open error logging (%s): %s",
                log_to_stderr?"standard error":fn_error,
259 260 261 262 263
                strerror(errno));
        _fatal_error(buf);
    }
    log_set_level(errorlog, config->loglevel);

264 265 266 267
    if(strcmp(config->access_log, "-") == 0) {
        accesslog = log_open_file(stderr);
        log_to_stderr = 1;
    } else {
268
        snprintf(fn_access, FILENAME_MAX, "%s%s%s", config->log_dir, PATH_SEPARATOR, config->access_log);
269
        accesslog = log_open(fn_access);
270
        log_to_stderr = 0;
271 272 273
        if (config->logsize)
            log_set_trigger (accesslog, config->logsize);
        log_set_archive_timestamp(accesslog, config->logarchive);
274
    }
275 276 277

    if (accesslog < 0) {
        buf[sizeof(buf)-1] = 0;
278 279 280 281
        snprintf(buf, sizeof(buf) - 1,
            "FATAL: could not open access logging (%s): %s",
            log_to_stderr ? "standard error" : fn_access,
            strerror(errno));
282 283
        _fatal_error(buf);
    }
284 285 286 287 288 289

    if(config->playlist_log) {
        snprintf(fn_playlist, FILENAME_MAX, "%s%s%s", config->log_dir, PATH_SEPARATOR, config->playlist_log);
        playlistlog = log_open(fn_playlist);
        if (playlistlog < 0) {
            buf[sizeof(buf)-1] = 0;
290
            snprintf(buf, sizeof(buf)-1,
291 292 293 294 295 296
                "FATAL: could not open playlist logging (%s): %s",
                log_to_stderr?"standard error":fn_playlist,
                strerror(errno));
            _fatal_error(buf);
        }
        log_to_stderr = 0;
297 298 299
        if (config->logsize)
            log_set_trigger (playlistlog, config->logsize);
        log_set_archive_timestamp(playlistlog, config->logarchive);
300 301 302
    } else {
        playlistlog = -1;
    }
303

304 305
    log_set_level(errorlog, config->loglevel);
    log_set_level(accesslog, 4);
306
    log_set_level(playlistlog, 4);
307 308

    if (errorlog >= 0 && accesslog >= 0) return 1;
309

310
    return 0;
Jack Moffitt's avatar
Jack Moffitt committed
311 312 313
}


314
static int _start_listening(void)
Jack Moffitt's avatar
Jack Moffitt committed
315
{
316 317
    int i;
    for(i=0; i < global.server_sockets; i++) {
318
        if (sock_listen(global.serversock[i], ICECAST_LISTEN_QUEUE) == SOCK_ERROR)
319
            return 0;
Jack Moffitt's avatar
Jack Moffitt committed
320

321
        sock_set_blocking(global.serversock[i], 0);
322
    }
Jack Moffitt's avatar
Jack Moffitt committed
323

324
    return 1;
Jack Moffitt's avatar
Jack Moffitt committed
325 326
}

327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378
static void pidfile_update(ice_config_t *config, int always_try)
{
    char *newpidfile = NULL;

    if (config->pidfile) {
        FILE *f;

        /* check if the file actually changed */
        if (pidfile && strcmp(pidfile, config->pidfile) == 0)
            return;

        ICECAST_LOG_DEBUG("New pidfile on %H", config->pidfile);

        if (!always_try) {
            if (config->chuid) {
                ICECAST_LOG_ERROR("Can not write new pidfile, changeowner in effect.");
                return;
            }

            if (config->chroot) {
                ICECAST_LOG_ERROR("Can not write new pidfile, chroot in effect.");
                return;
            }
        }

        newpidfile = strdup(config->pidfile);
        if (!newpidfile) {
            ICECAST_LOG_ERROR("Can not allocate memory for pidfile filename. BAD.");
            return;
        }

        f = fopen(newpidfile, "w");
        if (!f) {
            free(newpidfile);
            ICECAST_LOG_ERROR("Can not open new pidfile for writing.");
            return;
        }

        fprintf(f, "%lld\n", (long long int)getpid());
        fclose(f);

        ICECAST_LOG_INFO("pidfile %H updated.");
    }

    if (newpidfile != pidfile) {
        if (pidfile)
            remove(pidfile);
        free(pidfile);
        pidfile = newpidfile;
    }
}

379
/* bind the socket and start listening */
380
static int _server_proc_init(void)
Jack Moffitt's avatar
Jack Moffitt committed
381
{
382
    ice_config_t *config = config_get_config_unlocked();
383

384
    if (connection_setup_sockets (config) < 1)
385
        return 0;
Jack Moffitt's avatar
Jack Moffitt committed
386

387
    if (!_start_listening()) {
388
        _fatal_error("Failed trying to listen on server socket");
389 390
        return 0;
    }
391

392
    pidfile_update(config, 1);
393

394
    return 1;
395
}
Jack Moffitt's avatar
Jack Moffitt committed
396

397 398 399
/* this is the heart of the beast */
static void _server_proc(void)
{
400 401 402 403 404 405
    if (background)
    {
        fclose (stdin);
        fclose (stdout);
        fclose (stderr);
    }
406
    connection_accept_loop();
Jack Moffitt's avatar
Jack Moffitt committed
407

408
    connection_setup_sockets (NULL);
Jack Moffitt's avatar
Jack Moffitt committed
409 410
}

411
/* chroot the process. Watch out - we need to do this before starting other
412
 * threads. Change uid as well, after figuring out uid _first_ */
413
#if defined(HAVE_SETUID) || defined(HAVE_CHROOT) || defined(HAVE_SETUID)
Michael Smith's avatar
Michael Smith committed
414
static void _ch_root_uid_setup(void)
415
{
Michael Smith's avatar
Michael Smith committed
416
   ice_config_t *conf = config_get_config_unlocked();
417
#ifdef HAVE_SETUID
418 419 420 421 422 423 424
   struct passwd *user;
   struct group *group;
   uid_t uid=-1;
   gid_t gid=-1;

   if(conf->chuid)
   {
425 426 427 428 429 430 431 432 433
       if(conf->user) {
           user = getpwnam(conf->user);
           if(user)
               uid = user->pw_uid;
           else
               fprintf(stderr, "Couldn't find user \"%s\" in password file\n", conf->user);
       }
       if(conf->group) {
           group = getgrnam(conf->group);
434

435 436 437 438 439
           if(group)
               gid = group->gr_gid;
           else
               fprintf(stderr, "Couldn't find group \"%s\" in groups file\n", conf->group);
       }
440 441 442
   }
#endif

443
#if HAVE_CHROOT
444 445 446 447 448 449
   if (conf->chroot)
   {
       if(getuid()) /* root check */
       {
           fprintf(stderr, "WARNING: Cannot change server root unless running as root.\n");
       }
450
       if(chroot(conf->base_dir) == -1 || chdir("/") == -1)
451 452 453 454 455 456 457
       {
           fprintf(stderr,"WARNING: Couldn't change server root: %s\n", strerror(errno));
           return;
       }
       else
           fprintf(stdout, "Changed root successfully to \"%s\".\n", conf->base_dir);

458
   }
459
#endif
460

461
#if HAVE_SETUID
462 463 464 465 466 467 468 469
   if(conf->chuid)
   {
       if(getuid()) /* root check */
       {
           fprintf(stderr, "WARNING: Can't change user id unless you are root.\n");
           return;
       }

470
       if(uid != (uid_t)-1 && gid != (gid_t)-1) {
471 472 473 474 475
#ifdef HAVE_SETRESGID
           if(!setresgid(gid, gid, gid)) {
#else
           if(!setgid(gid)) {
#endif
476
               fprintf(stdout, "Changed groupid to %i.\n", (int)gid);
477
           } else {
478
               fprintf(stdout, "Error changing groupid: %s.\n", strerror(errno));
479
           }
480 481
           if(!initgroups(conf->user, gid))
               fprintf(stdout, "Changed supplementary groups based on user: %s.\n", conf->user);
482
           else
483
               fprintf(stdout, "Error changing supplementary groups: %s.\n", strerror(errno));
484 485 486 487 488
#ifdef HAVE_SETRESUID
           if(!setresuid(uid, uid, uid)) {
#else
           if(!setuid(uid)) {
#endif
489
               fprintf(stdout, "Changed userid to %i.\n", (int)uid);
490
           } else {
491
               fprintf(stdout, "Error changing userid: %s.\n", strerror(errno));
492
           }
493
       }
494 495
   }
#endif
496
}
497
#endif
Philipp Schafft's avatar
Philipp Schafft committed
498

499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538
static inline void __log_system_name(void) {
    char hostname[80] = "(unknown)";
    char system[128] = "(unknown)";
    int have_hostname = 0;
#ifdef HAVE_UNAME
    struct utsname utsname;
#endif
    ice_config_t *config;

#ifdef HAVE_GETHOSTNAME
    if (gethostname(hostname, sizeof(hostname)) != 0) {
        strncpy(hostname, "(unknown)", sizeof(hostname));
    } else {
        have_hostname = 1;
    }
#endif
#ifdef HAVE_UNAME
    if(uname(&utsname) == 0) {
        snprintf(system, sizeof(system), "%s %s, %s, %s, %s",
                 utsname.sysname, utsname.release, utsname.nodename, utsname.version, utsname.machine);
        if (!have_hostname) {
            strncpy(hostname, utsname.nodename, sizeof(hostname));
            have_hostname = 1;
        }
    }
#elif defined(WIN32)
    strncpy(system, "MS Windows", sizeof(system));
#endif

   ICECAST_LOG_INFO("Running on %s; OS: %s; Address Bits: %i", hostname, system, sizeof(void*)*8);

   if (have_hostname) {
       config = config_get_config();
       if (!config->sane_hostname && util_hostcheck(hostname) == HOSTCHECK_SANE) {
           ICECAST_LOG_WARN("Hostname is not set to anything useful in <hostname>, Consider setting it to the system's name \"%s\".", hostname);
       }
       config_release_config();
   }
}

539
#ifdef WIN32_SERVICE
Philipp Schafft's avatar
Philipp Schafft committed
540 541 542 543
int mainService(int argc, char **argv)
#else
int main(int argc, char **argv)
#endif
Jack Moffitt's avatar
Jack Moffitt committed
544
{
545
    int res, ret;
546 547 548 549 550
#ifdef ICECAST_DEFAULT_CONFIG
    char filename[512] = ICECAST_DEFAULT_CONFIG;
#else
    char filename[512] = "";
#endif
551
    char pbuf[1024];
552 553 554 555

    /* parse the '-c icecast.xml' option
    ** only, so that we can read a configfile
    */
556
    res = _parse_config_opts(argc, argv, filename, sizeof(filename));
557
    if (res == 1) {
558
#if !defined(_WIN32) || defined(_CONSOLE) || defined(__MINGW32__) || defined(__MINGW64__)
559
        /* startup all the modules */
560
        initialize_subsystems();
561 562 563 564 565
        if (!_start_logging_stdout()) {
            _fatal_error("FATAL: Could not start logging on stderr.");
            shutdown_subsystems();
            return 1;
        }
566
#endif
567
        /* parse the config file */
Michael Smith's avatar
Michael Smith committed
568
        config_get_config();
569
        ret = config_initial_parse_file(filename);
Michael Smith's avatar
Michael Smith committed
570
        config_release_config();
571
        if (ret < 0) {
572
            memset(pbuf, '\000', sizeof(pbuf));
573
            snprintf(pbuf, sizeof(pbuf)-1,
574 575
                "FATAL: error parsing config file (%s)", filename);
            _fatal_error(pbuf);
576 577
            switch (ret) {
            case CONFIG_EINSANE:
578
                _fatal_error("filename was null or blank");
579 580
                break;
            case CONFIG_ENOROOT:
581
                _fatal_error("no root element found");
582 583
                break;
            case CONFIG_EBADROOT:
584
                _fatal_error("root element is not <icecast>");
585 586
                break;
            default:
587
                _fatal_error("XML config parsing error");
588 589
                break;
            }
590
#if !defined(_WIN32) || defined(_CONSOLE) || defined(__MINGW32__) || defined(__MINGW64__)
591 592
            shutdown_subsystems();
#endif
593
            return 1;
594 595 596 597 598
        }
    } else if (res == -1) {
        _print_usage();
        return 1;
    }
599

600 601
    /* override config file options with commandline options */
    config_parse_cmdline(argc, argv);
Jack Moffitt's avatar
Jack Moffitt committed
602

603 604
    /* Bind socket, before we change userid */
    if(!_server_proc_init()) {
605
        _fatal_error("Server startup failed. Exiting");
606
        shutdown_subsystems();
607 608
        return 1;
    }
609

610
#if defined(HAVE_SETUID) || defined(HAVE_CHROOT) || defined(HAVE_SETUID)
Michael Smith's avatar
Michael Smith committed
611
    _ch_root_uid_setup(); /* Change user id and root if requested/possible */
612
#endif
613 614

    stats_initialize(); /* We have to do this later on because of threading */
615
    fserve_initialize(); /* This too */
616

617
#ifdef HAVE_SETUID
618 619
    /* We'll only have getuid() if we also have setuid(), it's reasonable to
     * assume */
620
    if(!getuid() && getpid() != 1) /* Running as root! Don't allow this */
621
    {
622
        fprintf(stderr, "ERROR: You should not run icecast2 as root\n");
623
        fprintf(stderr, "Use the changeowner directive in the config file\n");
624
        shutdown_subsystems();
625 626 627 628 629 630 631
        return 1;
    }
#endif

    /* setup default signal handlers */
    sighandler_initialize();

632
    if (!_start_logging()) {
633
        _fatal_error("FATAL: Could not start logging");
634
        shutdown_subsystems();
635 636
        return 1;
    }
Jack Moffitt's avatar
Jack Moffitt committed
637

638
    ICECAST_LOG_INFO("%s server started", ICECAST_VERSION_STRING);
639
    ICECAST_LOG_INFO("Server's PID is %lli", (long long int)getpid());
640
    __log_system_name();
Jack Moffitt's avatar
Jack Moffitt committed
641

642
    /* REM 3D Graphics */
Jack Moffitt's avatar
Jack Moffitt committed
643

644
    /* let her rip */
645
    global.running = ICECAST_RUNNING;
646 647 648 649

    /* Startup yp thread */
    yp_initialize();

650 651
    /* Do this after logging init */
    slave_initialize();
652
    auth_initialise ();
653
    event_initialise();
654

655
    event_emit_global("icecast-start");
656
    _server_proc();
657
    event_emit_global("icecast-stop");
Jack Moffitt's avatar
Jack Moffitt committed
658

659
    ICECAST_LOG_INFO("Shutting down");
660
#if !defined(_WIN32) || defined(_CONSOLE) || defined(__MINGW32__) || defined(__MINGW64__)
661 662
    shutdown_subsystems();
#endif
663 664 665 666 667 668
    if (pidfile)
    {
        remove (pidfile);
        free (pidfile);
    }

669
    return 0;
Jack Moffitt's avatar
Jack Moffitt committed
670 671 672
}