main.c 7.45 KB
Newer Older
Jack Moffitt's avatar
Jack Moffitt committed
1 2 3 4 5 6 7 8 9 10
#include <stdio.h>
#include <string.h>

#include "thread.h"
#include "avl.h"
#include "log.h"
#include "sock.h"
#include "resolver.h"
#include "httpp.h"

11 12 13 14 15 16
#ifdef CHUID
#include <sys/types.h>
#include <grp.h>
#include <pwd.h>
#include <errno.h>
#endif
Jack Moffitt's avatar
Jack Moffitt committed
17 18 19 20 21 22 23 24 25

#include "config.h"
#include "sighandler.h"

#include "global.h"
#include "os.h"
#include "connection.h"
#include "refbuf.h"
#include "client.h"
26
#include "slave.h"
Jack Moffitt's avatar
Jack Moffitt committed
27 28 29
#include "stats.h"
#include "logging.h"

30 31
#ifdef _WIN32
#define snprintf _snprintf
32
#endif
33

Jack Moffitt's avatar
Jack Moffitt committed
34 35 36
#undef CATMODULE
#define CATMODULE "main"

37
static void _print_usage()
Jack Moffitt's avatar
Jack Moffitt committed
38
{
39 40
	printf("Usage:\n");
	printf("\ticecast -c <file>\t\tSpecify configuration file\n");
Jack Moffitt's avatar
Jack Moffitt committed
41 42 43
	printf("\n");
}

44
static void _initialize_subsystems(void)
Jack Moffitt's avatar
Jack Moffitt committed
45 46 47 48 49 50 51 52 53 54 55
{
	log_initialize();
	thread_initialize();
	sock_initialize();
	resolver_initialize();
	config_initialize();
	connection_initialize();
	global_initialize();
	refbuf_initialize();
}

56
static void _shutdown_subsystems(void)
Jack Moffitt's avatar
Jack Moffitt committed
57 58 59
{
	refbuf_shutdown();
	stats_shutdown();
60
	slave_shutdown();
Jack Moffitt's avatar
Jack Moffitt committed
61 62 63 64 65 66 67 68 69
	global_shutdown();
	connection_shutdown();
	config_shutdown();
	resolver_shutdown();
	sock_shutdown();
	thread_shutdown();
	log_shutdown();
}

70
static int _parse_config_file(int argc, char **argv, char *filename, int size)
Jack Moffitt's avatar
Jack Moffitt committed
71 72 73
{
	int i = 1;

74
	if (argc < 3) return -1;
Jack Moffitt's avatar
Jack Moffitt committed
75 76 77 78 79 80 81 82 83 84 85 86 87

	while (i < argc) {
		if (strcmp(argv[i], "-c") == 0) {
			if (i + 1 < argc) {
				strncpy(filename, argv[i + 1], size);
				return 1;
			} else {
				return -1;
			}
		}
		i++;
	}

88
	return -1;
Jack Moffitt's avatar
Jack Moffitt committed
89 90
}

91
static int _start_logging(void)
Jack Moffitt's avatar
Jack Moffitt committed
92 93 94 95 96
{
	char fn_error[FILENAME_MAX];
	char fn_access[FILENAME_MAX];
	ice_config_t *config = config_get_config();

97 98 99 100 101 102 103 104 105 106 107 108
	if(strcmp(config->error_log, "-")) {
        snprintf(fn_error, FILENAME_MAX, "%s%s%s", config->log_dir, PATH_SEPARATOR, config->error_log);
	    errorlog = log_open(fn_error);
    } else {
        errorlog = log_open_file(stderr);
    }
	if(strcmp(config->access_log, "-")) {
        snprintf(fn_access, FILENAME_MAX, "%s%s%s", config->log_dir, PATH_SEPARATOR, config->access_log);
	    accesslog = log_open(fn_access);
    } else {
        accesslog = log_open_file(stderr);
    }
Jack Moffitt's avatar
Jack Moffitt committed
109
	
110
	log_set_level(errorlog, config->loglevel);
Jack Moffitt's avatar
Jack Moffitt committed
111 112 113 114 115 116 117 118 119 120 121 122
	log_set_level(accesslog, 4);

	if (errorlog < 0)
		fprintf(stderr, "FATAL: could not open %s for error logging\n", fn_error);
	if (accesslog < 0)
		fprintf(stderr, "FATAL: could not open %s for access logging\n", fn_access);

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

123
static void _stop_logging(void)
Jack Moffitt's avatar
Jack Moffitt committed
124 125 126 127 128
{
	log_close(errorlog);
	log_close(accesslog);
}

129
static int _setup_socket(void)
Jack Moffitt's avatar
Jack Moffitt committed
130 131 132 133 134 135 136 137 138 139 140 141
{
	ice_config_t *config;

	config = config_get_config();

	global.serversock = sock_get_server_socket(config->port, config->bind_address);
	if (global.serversock == SOCK_ERROR)
		return 0;
	
	return 1;
}

142
static int _start_listening(void)
Jack Moffitt's avatar
Jack Moffitt committed
143 144 145 146 147 148 149 150 151
{
	if (sock_listen(global.serversock, ICE_LISTEN_QUEUE) == SOCK_ERROR)
		return 0;

	sock_set_blocking(global.serversock, SOCK_NONBLOCK);

	return 1;
}

152
/* bind the socket and start listening */
153
static int _server_proc_init(void)
Jack Moffitt's avatar
Jack Moffitt committed
154 155
{
	if (!_setup_socket()) {
Michael Smith's avatar
Michael Smith committed
156
		fprintf(stderr, "Could not create listener socket on port %d\n", config_get_config()->port);
157
		return 0;
Jack Moffitt's avatar
Jack Moffitt committed
158 159 160
	}

	if (!_start_listening()) {
Michael Smith's avatar
Michael Smith committed
161
		fprintf(stderr, "Failed trying to listen on server socket\n");
162
		return 0;
Jack Moffitt's avatar
Jack Moffitt committed
163
	}
164 165

    return 1;
166
}
Jack Moffitt's avatar
Jack Moffitt committed
167

168 169 170
/* this is the heart of the beast */
static void _server_proc(void)
{
Jack Moffitt's avatar
Jack Moffitt committed
171 172 173 174 175
	connection_accept_loop();

	sock_close(global.serversock);
}

176
/* chroot the process. Watch out - we need to do this before starting other
177
 * threads. Change uid as well, after figuring out uid _first_ */
178

Michael Smith's avatar
Michael Smith committed
179
static void _ch_root_uid_setup(void)
180 181
{
   ice_config_t *conf = config_get_config();
182 183 184 185 186 187 188 189
#ifdef CHUID
   struct passwd *user;
   struct group *group;
   uid_t uid=-1;
   gid_t gid=-1;

   if(conf->chuid)
   {
190 191 192 193 194 195 196 197 198
       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);
199

200 201 202 203 204
           if(group)
               gid = group->gr_gid;
           else
               fprintf(stderr, "Couldn't find group \"%s\" in groups file\n", conf->group);
       }
205 206 207 208
   }
#endif

#ifdef CHROOT
209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226
   if (conf->chroot)
   {
       if(getuid()) /* root check */
       {
           fprintf(stderr, "WARNING: Cannot change server root unless running as root.\n");
           return;
       }
       if(chroot(conf->base_dir))
       {
           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);

   }   
#endif
#ifdef CHUID
227

228 229 230 231 232 233 234 235
   if(conf->chuid)
   {
       if(getuid()) /* root check */
       {
           fprintf(stderr, "WARNING: Can't change user id unless you are root.\n");
           return;
       }

236 237
       if(gid != -1) {
           if(!setgid(gid))
238
               fprintf(stdout, "Changed groupid to %i.\n", gid);
239 240 241
           else
               fprintf(stdout, "Error changing groupid: %s.\n", strerror(errno));
       }
242

243 244
       if(uid != -1) {
           if(!setuid(uid))
245
               fprintf(stdout, "Changed userid to %i.\n", uid);
246 247 248
           else
               fprintf(stdout, "Error changing userid: %s.\n", strerror(errno));
       }
249 250
   }
#endif
251
}
252

Jack Moffitt's avatar
Jack Moffitt committed
253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283
int main(int argc, char **argv)
{
	int res, ret;
	char filename[256];

	/* startup all the modules */
	_initialize_subsystems();

	/* parse the '-c icecast.xml' option
	** only, so that we can read a configfile
	*/
	res = _parse_config_file(argc, argv, filename, 256);
	if (res == 1) {
		/* parse the config file */
		ret = config_parse_file(filename);
		if (ret < 0) {
			fprintf(stderr, "FATAL: error parsing config file:");
			switch (ret) {
			case CONFIG_EINSANE:
				fprintf(stderr, "filename was null or blank\n");
				break;
			case CONFIG_ENOROOT:
				fprintf(stderr, "no root element found\n");
				break;
			case CONFIG_EBADROOT:
				fprintf(stderr, "root element is not <icecast>\n");
				break;
			default:
				fprintf(stderr, "parse error\n");
				break;
			}
284 285
            _shutdown_subsystems();
            return 1;
Jack Moffitt's avatar
Jack Moffitt committed
286 287 288 289 290 291 292 293 294 295
		}
	} else if (res == -1) {
		_print_usage();
		_shutdown_subsystems();
		return 1;
	}
	
	/* override config file options with commandline options */
	config_parse_cmdline(argc, argv);

296 297 298 299 300 301
    /* Bind socket, before we change userid */
    if(!_server_proc_init()) {
        fprintf(stderr, "Server startup failed. Exiting.\n");
        _shutdown_subsystems();
        return 1;
    }
302

Michael Smith's avatar
Michael Smith committed
303
    _ch_root_uid_setup(); /* Change user id and root if requested/possible */
304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321

    stats_initialize(); /* We have to do this later on because of threading */

#ifdef CHUID 
    /* We'll only have getuid() if we also have setuid(), it's reasonable to
     * assume */
    if(!getuid()) /* Running as root! Don't allow this */
    {
        fprintf(stderr, "WARNING: You should not run icecast2 as root\n");
        fprintf(stderr, "Use the changeowner directive in the config file\n");
        _shutdown_subsystems();
        return 1;
    }
#endif

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

Jack Moffitt's avatar
Jack Moffitt committed
322 323 324 325 326 327
	if (!_start_logging()) {
		fprintf(stderr, "FATAL: Could not start logging\n");
		_shutdown_subsystems();
		return 1;
	}

328 329 330
    /* Do this after logging init */
    slave_initialize();

Jack Moffitt's avatar
Jack Moffitt committed
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
	INFO0("icecast server started");

	/* REM 3D Graphics */

	/* let her rip */
	global.running = ICE_RUNNING;
	_server_proc();

	INFO0("Shutting down");

	_stop_logging();

	_shutdown_subsystems();

	return 0;
}