OSUOSL/Nero are experiencing Internet connectivity problems. This affects us as we're hosted with OSUOSL. We apologize for the inconvenience.

main.c 7.73 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"
Jack Moffitt's avatar
Jack Moffitt committed
31

32 33
#include <libxml/xmlmemory.h>

34 35
#ifdef _WIN32
#define snprintf _snprintf
36
#endif
37

Jack Moffitt's avatar
Jack Moffitt committed
38 39 40
#undef CATMODULE
#define CATMODULE "main"

41
static void _print_usage()
Jack Moffitt's avatar
Jack Moffitt committed
42
{
43 44
	printf("Usage:\n");
	printf("\ticecast -c <file>\t\tSpecify configuration file\n");
Jack Moffitt's avatar
Jack Moffitt committed
45 46 47
	printf("\n");
}

48 49 50 51 52 53
static void _stop_logging(void)
{
	log_close(errorlog);
	log_close(accesslog);
}

54
static void _initialize_subsystems(void)
Jack Moffitt's avatar
Jack Moffitt committed
55 56 57 58 59 60 61 62 63
{
	log_initialize();
	thread_initialize();
	sock_initialize();
	resolver_initialize();
	config_initialize();
	connection_initialize();
	global_initialize();
	refbuf_initialize();
64
    xslt_initialize();
Jack Moffitt's avatar
Jack Moffitt committed
65 66
}

67
static void _shutdown_subsystems(void)
Jack Moffitt's avatar
Jack Moffitt committed
68
{
69
    fserve_shutdown();
70
    xslt_shutdown();
Jack Moffitt's avatar
Jack Moffitt committed
71 72
	refbuf_shutdown();
	stats_shutdown();
73
	slave_shutdown();
74 75 76 77

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

Jack Moffitt's avatar
Jack Moffitt committed
78 79 80 81 82 83 84
	global_shutdown();
	connection_shutdown();
	config_shutdown();
	resolver_shutdown();
	sock_shutdown();
	thread_shutdown();
	log_shutdown();
85 86

    xmlCleanupParser();
Jack Moffitt's avatar
Jack Moffitt committed
87 88
}

89
static int _parse_config_file(int argc, char **argv, char *filename, int size)
Jack Moffitt's avatar
Jack Moffitt committed
90 91 92
{
	int i = 1;

93
	if (argc < 3) return -1;
Jack Moffitt's avatar
Jack Moffitt committed
94 95 96 97

	while (i < argc) {
		if (strcmp(argv[i], "-c") == 0) {
			if (i + 1 < argc) {
98 99
				strncpy(filename, argv[i + 1], size-1);
                filename[size-1] = 0;
Jack Moffitt's avatar
Jack Moffitt committed
100 101 102 103 104 105 106 107
				return 1;
			} else {
				return -1;
			}
		}
		i++;
	}

108
	return -1;
Jack Moffitt's avatar
Jack Moffitt committed
109 110
}

111
static int _start_logging(void)
Jack Moffitt's avatar
Jack Moffitt committed
112 113 114 115 116
{
	char fn_error[FILENAME_MAX];
	char fn_access[FILENAME_MAX];
	ice_config_t *config = config_get_config();

117 118 119 120 121 122 123 124 125 126 127 128
	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
129
	
130
	log_set_level(errorlog, config->loglevel);
Jack Moffitt's avatar
Jack Moffitt committed
131 132 133 134 135 136 137 138 139 140 141 142
	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;
}

143
static int _setup_socket(void)
Jack Moffitt's avatar
Jack Moffitt committed
144 145 146 147 148 149 150 151 152 153 154 155
{
	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;
}

156
static int _start_listening(void)
Jack Moffitt's avatar
Jack Moffitt committed
157 158 159 160 161 162 163 164 165
{
	if (sock_listen(global.serversock, ICE_LISTEN_QUEUE) == SOCK_ERROR)
		return 0;

	sock_set_blocking(global.serversock, SOCK_NONBLOCK);

	return 1;
}

166
/* bind the socket and start listening */
167
static int _server_proc_init(void)
Jack Moffitt's avatar
Jack Moffitt committed
168 169
{
	if (!_setup_socket()) {
Michael Smith's avatar
Michael Smith committed
170
		fprintf(stderr, "Could not create listener socket on port %d\n", config_get_config()->port);
171
		return 0;
Jack Moffitt's avatar
Jack Moffitt committed
172 173 174
	}

	if (!_start_listening()) {
Michael Smith's avatar
Michael Smith committed
175
		fprintf(stderr, "Failed trying to listen on server socket\n");
176
		return 0;
Jack Moffitt's avatar
Jack Moffitt committed
177
	}
178 179

    return 1;
180
}
Jack Moffitt's avatar
Jack Moffitt committed
181

182 183 184
/* this is the heart of the beast */
static void _server_proc(void)
{
Jack Moffitt's avatar
Jack Moffitt committed
185 186 187 188 189
	connection_accept_loop();

	sock_close(global.serversock);
}

190
/* chroot the process. Watch out - we need to do this before starting other
191
 * threads. Change uid as well, after figuring out uid _first_ */
192

Michael Smith's avatar
Michael Smith committed
193
static void _ch_root_uid_setup(void)
194 195
{
   ice_config_t *conf = config_get_config();
196 197 198 199 200 201 202 203
#ifdef CHUID
   struct passwd *user;
   struct group *group;
   uid_t uid=-1;
   gid_t gid=-1;

   if(conf->chuid)
   {
204 205 206 207 208 209 210 211 212
       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);
213

214 215 216 217 218
           if(group)
               gid = group->gr_gid;
           else
               fprintf(stderr, "Couldn't find group \"%s\" in groups file\n", conf->group);
       }
219 220 221 222
   }
#endif

#ifdef CHROOT
223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240
   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
241

242 243 244 245 246 247 248 249
   if(conf->chuid)
   {
       if(getuid()) /* root check */
       {
           fprintf(stderr, "WARNING: Can't change user id unless you are root.\n");
           return;
       }

250 251
       if(gid != -1) {
           if(!setgid(gid))
252
               fprintf(stdout, "Changed groupid to %i.\n", gid);
253 254 255
           else
               fprintf(stdout, "Error changing groupid: %s.\n", strerror(errno));
       }
256

257 258
       if(uid != -1) {
           if(!setuid(uid))
259
               fprintf(stdout, "Changed userid to %i.\n", uid);
260 261 262
           else
               fprintf(stdout, "Error changing userid: %s.\n", strerror(errno));
       }
263 264
   }
#endif
265
}
266

Jack Moffitt's avatar
Jack Moffitt committed
267 268 269
int main(int argc, char **argv)
{
	int res, ret;
270
	char filename[512];
Jack Moffitt's avatar
Jack Moffitt committed
271 272 273 274

	/* parse the '-c icecast.xml' option
	** only, so that we can read a configfile
	*/
275
	res = _parse_config_file(argc, argv, filename, 512);
Jack Moffitt's avatar
Jack Moffitt committed
276
	if (res == 1) {
277 278 279
	    /* startup all the modules */
    	_initialize_subsystems();

Jack Moffitt's avatar
Jack Moffitt committed
280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297
		/* 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;
			}
298 299
            _shutdown_subsystems();
            return 1;
Jack Moffitt's avatar
Jack Moffitt committed
300 301 302 303 304 305 306 307 308
		}
	} else if (res == -1) {
		_print_usage();
		return 1;
	}
	
	/* override config file options with commandline options */
	config_parse_cmdline(argc, argv);

309 310 311 312 313 314
    /* Bind socket, before we change userid */
    if(!_server_proc_init()) {
        fprintf(stderr, "Server startup failed. Exiting.\n");
        _shutdown_subsystems();
        return 1;
    }
315

Michael Smith's avatar
Michael Smith committed
316
    _ch_root_uid_setup(); /* Change user id and root if requested/possible */
317 318

    stats_initialize(); /* We have to do this later on because of threading */
319
    fserve_initialize(); /* This too */
320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335

#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
336 337 338 339 340 341
	if (!_start_logging()) {
		fprintf(stderr, "FATAL: Could not start logging\n");
		_shutdown_subsystems();
		return 1;
	}

342 343 344
    /* Do this after logging init */
    slave_initialize();

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

	/* REM 3D Graphics */

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

	INFO0("Shutting down");

	_shutdown_subsystems();

	return 0;
}