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icecast-server/src/main.c
Philipp Schafft 2357cca098 Feature: Report sizeof(fd_set) in version display
2023-06-11 20:09:31 +00:00

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/* Icecast
*
* This program is distributed under the GNU General Public License, version 2.
* A copy of this license is included with this source.
*
* Copyright 2000-2004, Jack Moffitt <jack@xiph.org,
* Michael Smith <msmith@xiph.org>,
* oddsock <oddsock@xiph.org>,
* Karl Heyes <karl@xiph.org>,
* and others (see AUTHORS for details).
* Copyright 2011-2022, Philipp "ph3-der-loewe" Schafft <lion@lion.leolix.org>,
* Copyright 2014, Thomas B. Ruecker <thomas@ruecker.fi>.
*/
/* -*- c-basic-offset: 4; indent-tabs-mode: nil; -*- */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#ifdef HAVE_CURL
#include "curl.h"
#endif
#ifdef WIN32
#ifndef _WIN32_WINNT
#define _WIN32_WINNT 0x0400
#endif
/* For getpid() */
#include <process.h>
#include <windows.h>
#define snprintf _snprintf
#define getpid _getpid
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_UNAME
#include <sys/utsname.h>
#endif
#include <igloo/error.h>
#include "common/thread/thread.h"
#include "common/net/sock.h"
#include "common/net/resolver.h"
#include "common/httpp/httpp.h"
#if HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#if HAVE_GRP_H
#include <grp.h>
#endif
#if HAVE_PWD_H
#include <pwd.h>
#endif
#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#include <rhash.h>
#include "main.h"
#include "version.h"
#include "cfgfile.h"
#include "util.h"
#include "sighandler.h"
#include "global.h"
#include "compat.h"
#include "connection.h"
#include "refbuf.h"
#include "client.h"
#include "slave.h"
#include "stats.h"
#include "logging.h"
#include "xslt.h"
#include "fserve.h"
#include "yp.h"
#include "auth.h"
#include "event.h"
#include "ping.h"
#include "listensocket.h"
#include "fastevent.h"
#include "prng.h"
#include "navigation.h"
#include <libxml/xmlmemory.h>
#undef CATMODULE
#define CATMODULE "main"
static bool background;
static char *pidfile = NULL;
static void pidfile_update(ice_config_t *config, int always_try);
static void _fatal_error(const char *perr)
{
#ifdef WIN32_SERVICE
MessageBox(NULL, perr, "Error", MB_SERVICE_NOTIFICATION);
#elif defined(WIN32)
MessageBox(NULL, perr, "Error", MB_OK);
#else
fprintf(stdout, "%s\n", perr);
#endif
}
static void _print_usage(void)
{
printf("%s\n\n", ICECAST_VERSION_STRING);
printf("usage: icecast [-b] -c <file>\n");
printf("or : icecast {-v|--version}\n");
printf("options:\n");
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");
printf("\n");
}
static void _stop_logging(void)
{
log_close(errorlog);
log_close(accesslog);
log_close(playlistlog);
}
#ifndef FASTEVENT_ENABLED
static void __fastevent_cb(const void *userdata, fastevent_type_t type, fastevent_flag_t flags, fastevent_datatype_t datatype, va_list ap)
{
event_t *event;
if (datatype != FASTEVENT_DATATYPE_EVENT)
return;
event = va_arg(ap, event_t*);
if (event == NULL) {
ICECAST_LOG_DEBUG("event=%p", event);
} else {
ICECAST_LOG_DEBUG("event=%p{.trigger='%s', ...}", event, event->trigger);
}
}
static refobject_t fastevent_reg;
#endif
static void initialize_subsystems(void)
{
log_initialize();
thread_initialize();
prng_initialize();
navigation_initialize();
global_initialize();
#ifndef FASTEVENT_ENABLED
fastevent_initialize();
fastevent_reg = fastevent_register(FASTEVENT_TYPE_SLOWEVENT, __fastevent_cb, NULL, NULL);
#endif
sock_initialize();
resolver_initialize();
config_initialize();
tls_initialize();
client_initialize();
connection_initialize();
refbuf_initialize();
xslt_initialize();
#ifdef HAVE_CURL
icecast_curl_initialize();
ping_initialize();
#endif
}
static void shutdown_subsystems(void)
{
ICECAST_LOG_DEBUG("Shuting down subsystems...");
event_shutdown();
fserve_shutdown();
refbuf_shutdown();
slave_shutdown();
auth_shutdown();
yp_shutdown();
stats_shutdown();
#ifdef HAVE_CURL
ping_shutdown();
#endif
ICECAST_LOG_DEBUG("Shuting down connection related subsystems...");
connection_shutdown();
client_shutdown();
tls_shutdown();
prng_deconfigure();
config_shutdown();
resolver_shutdown();
sock_shutdown();
#ifndef FASTEVENT_ENABLED
refobject_unref(fastevent_reg);
fastevent_shutdown();
#endif
navigation_shutdown();
prng_shutdown();
global_shutdown();
thread_shutdown();
#ifdef HAVE_CURL
icecast_curl_shutdown();
#endif
ICECAST_LOG_DEBUG("Shuting down logging subsystem. See you!");
/* Now that these are done, we can stop the loggers. */
_stop_logging();
log_shutdown();
xslt_shutdown();
}
void main_config_reload(ice_config_t *config)
{
ICECAST_LOG_DEBUG("Reloading configuration.");
pidfile_update(config, 0);
}
static void show_version(bool full)
{
printf("%s\n", ICECAST_VERSION_STRING);
if (full) {
const char * const * compiletime_flag = version_get_compiletime_flags();
const icecast_dependency_t * dependencies = version_get_dependencies();
size_t i;
printf("\n");
printf("Address bits: %u\n", (unsigned int)sizeof(void*)*8);
#ifdef HAVE_SYS_SELECT_H
printf("fd set size: %u entries\n", (unsigned int)FD_SETSIZE);
printf("fd_set size: %u Bytes\n", (unsigned int)sizeof(fd_set));
#endif
printf("Compile time flags: ");
for (i = 0; compiletime_flag[i]; i++)
printf("%s ", compiletime_flag[i]);
printf("\n");
printf("Dependencies:\n");
for (i = 0; dependencies[i].name; i++) {
printf(" %s:\n", dependencies[i].name);
if (dependencies[i].compiletime)
printf(" compile time: %s\n", dependencies[i].compiletime);
if (dependencies[i].runtime)
printf(" run time: %s\n", dependencies[i].runtime);
}
}
}
static bool _parse_config_opts(int argc, char **argv, char *filename, size_t size)
{
int i;
bool config_ok = false;
background = false;
if (argc < 2) {
if (filename[0] != 0) {
/* We have a default filename, so we can work with no options. */
return true;
} else {
/* We need at least a config filename. */
return false;
}
}
for (i = 1; i < argc; i++) {
const char *opt = argv[i];
if (strcmp(opt, "-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!\n");
exit(1);
}
background = true;
#endif
} else if (strcmp(opt, "-v") == 0 || strcmp(opt, "--version") == 0) {
show_version(false);
exit(0);
} else if (strcmp(opt, "-V") == 0) {
show_version(true);
exit(0);
} else if (strcmp(opt, "-c") == 0) {
if ((i + 1) < argc) {
strncpy(filename, argv[++i], size-1);
filename[size-1] = 0;
config_ok = true;
} else {
return false;
}
} else {
fprintf(stderr, "FATAL: Invalid option: %s\n", opt);
return false;
}
}
return config_ok;
}
static int _start_logging_stdout(void) {
errorlog = log_open_file(stderr);
if ( errorlog < 0 )
return 0;
log_set_level(errorlog, ICECAST_LOGLEVEL_WARN);
return 1;
}
static int _start_logging(void)
{
char fn_error[FILENAME_MAX];
char fn_access[FILENAME_MAX];
char fn_playlist[FILENAME_MAX];
char buf[FILENAME_MAX+1024];
int log_to_stderr;
ice_config_t *config = config_get_config_unlocked();
if(strcmp(config->error_log, "-") == 0) {
/* this is already in place because of _start_logging_stdout() */
} else {
snprintf(fn_error, FILENAME_MAX, "%s%s%s", config->log_dir, PATH_SEPARATOR, config->error_log);
errorlog = log_open(fn_error);
log_to_stderr = 0;
if (config->logsize)
log_set_trigger (errorlog, config->logsize);
log_set_archive_timestamp(errorlog, config->logarchive);
}
if (errorlog < 0) {
buf[sizeof(buf)-1] = 0;
snprintf(buf, sizeof(buf)-1,
"FATAL: could not open error logging (%s): %s",
log_to_stderr?"standard error":fn_error,
strerror(errno));
_fatal_error(buf);
}
log_set_level(errorlog, config->loglevel);
if(strcmp(config->access_log, "-") == 0) {
accesslog = log_open_file(stderr);
log_to_stderr = 1;
} else {
snprintf(fn_access, FILENAME_MAX, "%s%s%s", config->log_dir, PATH_SEPARATOR, config->access_log);
accesslog = log_open(fn_access);
log_to_stderr = 0;
if (config->logsize)
log_set_trigger (accesslog, config->logsize);
log_set_archive_timestamp(accesslog, config->logarchive);
}
if (accesslog < 0) {
buf[sizeof(buf)-1] = 0;
snprintf(buf, sizeof(buf) - 1,
"FATAL: could not open access logging (%s): %s",
log_to_stderr ? "standard error" : fn_access,
strerror(errno));
_fatal_error(buf);
}
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;
snprintf(buf, sizeof(buf)-1,
"FATAL: could not open playlist logging (%s): %s",
log_to_stderr?"standard error":fn_playlist,
strerror(errno));
_fatal_error(buf);
}
log_to_stderr = 0;
if (config->logsize)
log_set_trigger (playlistlog, config->logsize);
log_set_archive_timestamp(playlistlog, config->logarchive);
} else {
playlistlog = -1;
}
log_set_level(errorlog, config->loglevel);
log_set_level(accesslog, 4);
log_set_level(playlistlog, 4);
log_set_lines_kept(errorlog, config->error_log_lines_kept);
log_set_lines_kept(accesslog, config->access_log_lines_kept);
log_set_lines_kept(playlistlog, config->playlist_log_lines_kept);
if (errorlog >= 0 && accesslog >= 0) return 1;
return 0;
}
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.", pidfile);
}
if (newpidfile != pidfile) {
if (pidfile)
remove(pidfile);
free(pidfile);
pidfile = newpidfile;
}
}
/* bind the socket and start listening */
static int _server_proc_init(void)
{
ice_config_t *config = config_get_config_unlocked();
connection_setup_sockets(config);
if (listensocket_container_sockcount(global.listensockets) < 1) {
ICECAST_LOG_ERROR("Can not listen on any sockets.");
return 0;
}
pidfile_update(config, 1);
return 1;
}
/* this is the heart of the beast */
static void _server_proc(void)
{
if (background)
{
fclose (stdin);
fclose (stdout);
fclose (stderr);
}
connection_accept_loop();
connection_setup_sockets (NULL);
}
/* chroot the process. Watch out - we need to do this before starting other
* threads. Change uid as well, after figuring out uid _first_ */
#if defined(HAVE_SETUID) || defined(HAVE_CHROOT) || defined(HAVE_SETUID)
static void _ch_root_uid_setup(void)
{
ice_config_t *conf = config_get_config_unlocked();
#ifdef HAVE_SETUID
struct passwd *user;
struct group *group;
uid_t uid=-1;
gid_t gid=-1;
if(conf->chuid)
{
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);
if(group)
gid = group->gr_gid;
else
fprintf(stderr, "Couldn't find group \"%s\" in groups file\n", conf->group);
}
}
#endif
/* ensure a valid initial state */
global.chroot_succeeded = false;
global.chuid_succeeded = false;
#if HAVE_CHROOT
if (conf->chroot) {
if (getuid()) { /* root check */
fprintf(stderr, "WARNING: Cannot change server root unless running as root.\n");
}
if(chroot(conf->base_dir) == -1 || chdir("/") == -1) {
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);
global.chroot_succeeded = true;
}
}
#endif
#if HAVE_SETUID
if(conf->chuid) {
if (getuid()) { /* root check */
fprintf(stderr, "WARNING: Can't change user id unless you are root.\n");
return;
}
if (uid != (uid_t)-1 && gid != (gid_t)-1) {
global.chuid_succeeded = true;
#ifdef HAVE_SETRESGID
if(!setresgid(gid, gid, gid)) {
#else
if(!setgid(gid)) {
#endif
fprintf(stdout, "Changed groupid to %i.\n", (int)gid);
} else {
fprintf(stdout, "Error changing groupid: %s.\n", strerror(errno));
global.chuid_succeeded = false;
}
if(!initgroups(conf->user, gid)) {
fprintf(stdout, "Changed supplementary groups based on user: %s.\n", conf->user);
} else {
fprintf(stdout, "Error changing supplementary groups: %s.\n", strerror(errno));
global.chuid_succeeded = false;
}
#ifdef HAVE_SETRESUID
if(!setresuid(uid, uid, uid)) {
#else
if(!setuid(uid)) {
#endif
fprintf(stdout, "Changed userid to %i.\n", (int)uid);
} else {
fprintf(stdout, "Error changing userid: %s.\n", strerror(errno));
global.chuid_succeeded = false;
}
}
}
#endif
}
#endif
static inline void __log_system_name(void) {
char hostname[80] = "(unknown)";
char system[1024] = "(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);
config = config_get_config();
if (have_hostname) {
if ((config->config_problems & CONFIG_PROBLEM_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);
}
}
ICECAST_LOG_INFO("From configuration: Our hostname is %#H, located % #H, with admin contact % #H", config->hostname, config->location, config->admin);
config_release_config();
}
#ifdef WIN32_SERVICE
int mainService(int argc, char **argv)
#else
int main(int argc, char **argv)
#endif
{
int ret;
#ifdef ICECAST_DEFAULT_CONFIG
char filename[512] = ICECAST_DEFAULT_CONFIG;
#else
char filename[512] = "";
#endif
char pbuf[1024];
ice_config_t *config;
if (igloo_initialize(&igloo_instance) != igloo_ERROR_NONE) {
_fatal_error("FATAL: Can not initialize libigloo.");
return 1;
}
/* likely libigloo already did this for us, however how should we know?
* Still/Only required for htpasswd MD5 support.
*/
rhash_library_init();
/* parse the '-c icecast.xml' option
** only, so that we can read a configfile
*/
if (_parse_config_opts(argc, argv, filename, sizeof(filename))) {
#if !defined(_WIN32) || defined(_CONSOLE) || defined(__MINGW32__) || defined(__MINGW64__)
/* startup all the modules */
initialize_subsystems();
if (!_start_logging_stdout()) {
_fatal_error("FATAL: Could not start logging on stderr.");
shutdown_subsystems();
igloo_ro_unref(&igloo_instance);
return 1;
}
#endif
/* parse the config file */
config_get_config();
ret = config_initial_parse_file(filename);
config_release_config();
if (ret < 0) {
memset(pbuf, '\000', sizeof(pbuf));
snprintf(pbuf, sizeof(pbuf)-1,
"FATAL: error parsing config file (%s)", filename);
_fatal_error(pbuf);
switch (ret) {
case CONFIG_EINSANE:
_fatal_error("filename was null or blank");
break;
case CONFIG_ENOROOT:
_fatal_error("no root element found");
break;
case CONFIG_EBADROOT:
_fatal_error("root element is not <icecast>");
break;
default:
_fatal_error("XML config parsing error");
break;
}
#if !defined(_WIN32) || defined(_CONSOLE) || defined(__MINGW32__) || defined(__MINGW64__)
shutdown_subsystems();
#endif
igloo_ro_unref(&igloo_instance);
return 1;
}
} else {
_print_usage();
igloo_ro_unref(&igloo_instance);
return 1;
}
/* override config file options with commandline options */
config_parse_cmdline(argc, argv);
/* Bind socket, before we change userid */
if(!_server_proc_init()) {
_fatal_error("Server startup failed. Exiting");
shutdown_subsystems();
igloo_ro_unref(&igloo_instance);
return 1;
}
#if defined(HAVE_SETUID) || defined(HAVE_CHROOT) || defined(HAVE_SETUID)
_ch_root_uid_setup(); /* Change user id and root if requested/possible */
#endif
if (!_start_logging()) {
_fatal_error("FATAL: Could not start logging");
shutdown_subsystems();
igloo_ro_unref(&igloo_instance);
return 1;
}
config = config_get_config();
prng_configure(config);
config_release_config();
stats_initialize(); /* We have to do this later on because of threading */
fserve_initialize(); /* This too */
#ifdef HAVE_SETUID
/* We'll only have getuid() if we also have setuid(), it's reasonable to
* assume */
if(!getuid() && getpid() != 1) /* Running as root! Don't allow this */
{
fprintf(stderr, "ERROR: You should not run icecast2 as root\n");
fprintf(stderr, "Use the changeowner directive in the config file\n");
shutdown_subsystems();
igloo_ro_unref(&igloo_instance);
return 1;
}
#endif
/* setup default signal handlers */
sighandler_initialize();
ICECAST_LOG_INFO("%s server started", ICECAST_VERSION_STRING);
ICECAST_LOG_INFO("Server's PID is %lli", (long long int)getpid());
__log_system_name();
/* REM 3D Graphics */
/* let her rip */
global.running = ICECAST_RUNNING;
/* Startup yp thread */
yp_initialize();
/* Do this after logging init */
slave_initialize();
auth_initialise ();
event_initialise();
event_emit_global("icecast-start");
_server_proc();
event_emit_global("icecast-stop");
ICECAST_LOG_INFO("Shutting down");
#if !defined(_WIN32) || defined(_CONSOLE) || defined(__MINGW32__) || defined(__MINGW64__)
shutdown_subsystems();
#endif
if (pidfile)
{
remove (pidfile);
free (pidfile);
}
igloo_ro_unref(&igloo_instance);
return 0;
}
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