main.c 8.14 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
#include "stats.h"
#include "logging.h"
29
#include "xslt.h"
30
#include "fserve.h"
31
#include "geturl.h"
Jack Moffitt's avatar
Jack Moffitt committed
32

33 34
#include <libxml/xmlmemory.h>

35 36
#ifdef _WIN32
#define snprintf _snprintf
37
#endif
38

Jack Moffitt's avatar
Jack Moffitt committed
39 40 41
#undef CATMODULE
#define CATMODULE "main"

42
static void _print_usage()
Jack Moffitt's avatar
Jack Moffitt committed
43
{
44 45
	printf("Usage:\n");
	printf("\ticecast -c <file>\t\tSpecify configuration file\n");
Jack Moffitt's avatar
Jack Moffitt committed
46 47 48
	printf("\n");
}

49 50 51 52 53 54
static void _stop_logging(void)
{
	log_close(errorlog);
	log_close(accesslog);
}

55
static void _initialize_subsystems(void)
Jack Moffitt's avatar
Jack Moffitt committed
56 57 58 59 60 61 62 63 64
{
	log_initialize();
	thread_initialize();
	sock_initialize();
	resolver_initialize();
	config_initialize();
	connection_initialize();
	global_initialize();
	refbuf_initialize();
65
    xslt_initialize();
66
	curl_initialize();
Jack Moffitt's avatar
Jack Moffitt committed
67 68
}

69
static void _shutdown_subsystems(void)
Jack Moffitt's avatar
Jack Moffitt committed
70
{
71
	curl_shutdown();
72
    fserve_shutdown();
73
    xslt_shutdown();
Jack Moffitt's avatar
Jack Moffitt committed
74 75
	refbuf_shutdown();
	stats_shutdown();
76
	slave_shutdown();
77 78 79 80

    /* Now that these are done, we can stop the loggers. */
	_stop_logging();

Jack Moffitt's avatar
Jack Moffitt committed
81 82 83 84 85 86 87
	global_shutdown();
	connection_shutdown();
	config_shutdown();
	resolver_shutdown();
	sock_shutdown();
	thread_shutdown();
	log_shutdown();
88 89

    xmlCleanupParser();
Jack Moffitt's avatar
Jack Moffitt committed
90 91
}

92
static int _parse_config_file(int argc, char **argv, char *filename, int size)
Jack Moffitt's avatar
Jack Moffitt committed
93 94
{
	int i = 1;
95
	int	processID = 0;
Jack Moffitt's avatar
Jack Moffitt committed
96

97
	if (argc < 3) return -1;
Jack Moffitt's avatar
Jack Moffitt committed
98 99

	while (i < argc) {
100 101 102 103 104 105 106 107 108
		if (strcmp(argv[i], "-b") == 0) {
#ifndef WIN32
				fprintf(stdout, "Starting icecast2\nDetaching from the console\n");
				if ((processID = (int)fork()) > 0) {
						/* exit the parent */
						_exit(0);
				}
#endif
		}
Jack Moffitt's avatar
Jack Moffitt committed
109 110
		if (strcmp(argv[i], "-c") == 0) {
			if (i + 1 < argc) {
111 112
				strncpy(filename, argv[i + 1], size-1);
                filename[size-1] = 0;
Jack Moffitt's avatar
Jack Moffitt committed
113 114 115 116 117 118 119 120
				return 1;
			} else {
				return -1;
			}
		}
		i++;
	}

121
	return -1;
Jack Moffitt's avatar
Jack Moffitt committed
122 123
}

124
static int _start_logging(void)
Jack Moffitt's avatar
Jack Moffitt committed
125 126 127
{
	char fn_error[FILENAME_MAX];
	char fn_access[FILENAME_MAX];
128
	ice_config_t *config = config_get_config_unlocked();
Jack Moffitt's avatar
Jack Moffitt committed
129

130 131 132 133 134 135 136 137 138 139 140 141
	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
142
	
143
	log_set_level(errorlog, config->loglevel);
Jack Moffitt's avatar
Jack Moffitt committed
144 145 146 147 148 149 150 151 152 153 154 155
	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;
}

156
static int _setup_socket(void)
Jack Moffitt's avatar
Jack Moffitt committed
157 158 159
{
	ice_config_t *config;

160
	config = config_get_config_unlocked();
Jack Moffitt's avatar
Jack Moffitt committed
161 162

	global.serversock = sock_get_server_socket(config->port, config->bind_address);
163

Jack Moffitt's avatar
Jack Moffitt committed
164 165 166 167 168 169
	if (global.serversock == SOCK_ERROR)
		return 0;
	
	return 1;
}

170
static int _start_listening(void)
Jack Moffitt's avatar
Jack Moffitt committed
171 172 173 174 175 176 177 178 179
{
	if (sock_listen(global.serversock, ICE_LISTEN_QUEUE) == SOCK_ERROR)
		return 0;

	sock_set_blocking(global.serversock, SOCK_NONBLOCK);

	return 1;
}

180
/* bind the socket and start listening */
181
static int _server_proc_init(void)
Jack Moffitt's avatar
Jack Moffitt committed
182 183
{
	if (!_setup_socket()) {
184 185
		fprintf(stderr, "Could not create listener socket on port %d\n", 
                config_get_config_unlocked()->port);
186
		return 0;
Jack Moffitt's avatar
Jack Moffitt committed
187 188 189
	}

	if (!_start_listening()) {
Michael Smith's avatar
Michael Smith committed
190
		fprintf(stderr, "Failed trying to listen on server socket\n");
191
		return 0;
Jack Moffitt's avatar
Jack Moffitt committed
192
	}
193 194

    return 1;
195
}
Jack Moffitt's avatar
Jack Moffitt committed
196

197 198 199
/* this is the heart of the beast */
static void _server_proc(void)
{
Jack Moffitt's avatar
Jack Moffitt committed
200 201 202 203 204
	connection_accept_loop();

	sock_close(global.serversock);
}

205
/* chroot the process. Watch out - we need to do this before starting other
206
 * threads. Change uid as well, after figuring out uid _first_ */
207

Michael Smith's avatar
Michael Smith committed
208
static void _ch_root_uid_setup(void)
209
{
210
   ice_config_t *conf = config_get_config_unlocked();
211 212 213 214 215 216 217 218
#ifdef CHUID
   struct passwd *user;
   struct group *group;
   uid_t uid=-1;
   gid_t gid=-1;

   if(conf->chuid)
   {
219 220 221 222 223 224 225 226 227
       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);
228

229 230 231 232 233
           if(group)
               gid = group->gr_gid;
           else
               fprintf(stderr, "Couldn't find group \"%s\" in groups file\n", conf->group);
       }
234 235 236 237
   }
#endif

#ifdef CHROOT
238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255
   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
256

257 258 259 260 261 262 263 264
   if(conf->chuid)
   {
       if(getuid()) /* root check */
       {
           fprintf(stderr, "WARNING: Can't change user id unless you are root.\n");
           return;
       }

265 266
       if(gid != -1) {
           if(!setgid(gid))
267
               fprintf(stdout, "Changed groupid to %i.\n", gid);
268 269 270
           else
               fprintf(stdout, "Error changing groupid: %s.\n", strerror(errno));
       }
271

272 273
       if(uid != -1) {
           if(!setuid(uid))
274
               fprintf(stdout, "Changed userid to %i.\n", uid);
275 276 277
           else
               fprintf(stdout, "Error changing userid: %s.\n", strerror(errno));
       }
278 279
   }
#endif
280
}
281

Jack Moffitt's avatar
Jack Moffitt committed
282 283 284
int main(int argc, char **argv)
{
	int res, ret;
285
	char filename[512];
Jack Moffitt's avatar
Jack Moffitt committed
286 287 288 289

	/* parse the '-c icecast.xml' option
	** only, so that we can read a configfile
	*/
290
	res = _parse_config_file(argc, argv, filename, 512);
Jack Moffitt's avatar
Jack Moffitt committed
291
	if (res == 1) {
292 293 294
	    /* startup all the modules */
    	_initialize_subsystems();

Jack Moffitt's avatar
Jack Moffitt committed
295
		/* parse the config file */
296 297 298
        config_get_config();
		ret = config_initial_parse_file(filename);
        config_release_config();
Jack Moffitt's avatar
Jack Moffitt committed
299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314
		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;
			}
315 316
            _shutdown_subsystems();
            return 1;
Jack Moffitt's avatar
Jack Moffitt committed
317 318 319 320 321 322 323 324 325
		}
	} else if (res == -1) {
		_print_usage();
		return 1;
	}
	
	/* override config file options with commandline options */
	config_parse_cmdline(argc, argv);

326 327 328 329 330 331
    /* Bind socket, before we change userid */
    if(!_server_proc_init()) {
        fprintf(stderr, "Server startup failed. Exiting.\n");
        _shutdown_subsystems();
        return 1;
    }
332

Michael Smith's avatar
Michael Smith committed
333
    _ch_root_uid_setup(); /* Change user id and root if requested/possible */
334 335

    stats_initialize(); /* We have to do this later on because of threading */
336
    fserve_initialize(); /* This too */
337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352

#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
353 354 355 356 357 358
	if (!_start_logging()) {
		fprintf(stderr, "FATAL: Could not start logging\n");
		_shutdown_subsystems();
		return 1;
	}

359 360 361
    /* Do this after logging init */
    slave_initialize();

Jack Moffitt's avatar
Jack Moffitt committed
362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390
	INFO0("icecast server started");

	/* REM 3D Graphics */

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

	INFO0("Shutting down");

	_shutdown_subsystems();

	return 0;
}