moonbridge: moonbridge.c annotate

moonbridge

annotate moonbridge.c @ 124:61a2f55b3538

Do not announce socket/listener type when communicating with the child process
(unnecessary because pointer to listener struct is passed)

author	jbe
date	Sun Apr 12 00:33:08 2015 +0200 (2015-04-12)
parents	84aa2b8dcf79
children	d9cc81641175

rev	line source
jbe@58	1
jbe@58	2 /* Version */
jbe@58	3 #define MOONBR_VERSION_STRING "0.4.0"
jbe@58	4
jbe@0	5
jbe@0	6 /* Compile-time configuration */
jbe@0	7
jbe@0	8 #define MOONBR_LUA_PANIC_BUG_WORKAROUND 1
jbe@0	9
jbe@0	10
jbe@0	11 /* C preprocessor macros for portability support */
jbe@0	12
jbe@0	13 #ifndef __has_include
jbe@0	14 #define __has_include(x) 0
jbe@0	15 #endif
jbe@0	16
jbe@0	17
jbe@0	18 /* Include directives for used system libraries */
jbe@0	19
jbe@0	20 #if defined(__linux__)
jbe@0	21 #define _GNU_SOURCE
jbe@0	22 #endif
jbe@0	23 #include <stdlib.h>
jbe@0	24 #include <unistd.h>
jbe@0	25 #include <stdint.h>
jbe@0	26 #include <errno.h>
jbe@0	27 #include <getopt.h>
jbe@0	28 #include <syslog.h>
jbe@0	29 #include <string.h>
jbe@0	30 #include <stdio.h>
jbe@0	31 #include <time.h>
jbe@0	32 #include <sys/time.h>
jbe@0	33 #include <sys/socket.h>
jbe@0	34 #include <sys/un.h>
jbe@0	35 #include <netinet/in.h>
jbe@0	36 #include <poll.h>
jbe@0	37 #include <signal.h>
jbe@0	38 #include <sys/wait.h>
jbe@0	39 #include <sys/resource.h>
jbe@0	40 #include <sys/file.h>
jbe@0	41 #if defined(__FreeBSD__) \|\| __has_include(<libutil.h>)
jbe@0	42 #include <libutil.h>
jbe@0	43 #endif
jbe@22	44 #if defined(__linux__) \|\| __has_include(<bsd/stdio.h>)
jbe@22	45 #include <bsd/stdio.h>
jbe@22	46 #endif
jbe@0	47 #if defined(__linux__) \|\| __has_include(<bsd/libutil.h>)
jbe@0	48 #include <bsd/libutil.h>
jbe@0	49 #endif
jbe@0	50 #if defined(__linux__) \|\| __has_include(<bsd/unistd.h>)
jbe@0	51 #include <bsd/unistd.h>
jbe@0	52 #endif
jbe@0	53
jbe@0	54
jbe@0	55 /* Fallback definitions for missing constants on some platforms */
jbe@0	56
jbe@0	57 /* INFTIM is used as timeout parameter for poll() */
jbe@0	58 #ifndef INFTIM
jbe@0	59 #define INFTIM -1
jbe@0	60 #endif
jbe@0	61
jbe@0	62
jbe@0	63 /* Include directives for Lua */
jbe@0	64
jbe@0	65 #include <lua.h>
jbe@0	66 #include <lauxlib.h>
jbe@0	67 #include <lualib.h>
jbe@0	68
jbe@0	69
jbe@79	70 /* Include directive for moonbridge_io library */
jbe@79	71
jbe@79	72 #include "moonbridge_io.h"
jbe@79	73
jbe@79	74
jbe@0	75 /* Constants */
jbe@0	76
jbe@0	77 /* Backlog option for listen() call */
jbe@0	78 #define MOONBR_LISTEN_BACKLOG 1024
jbe@0	79
jbe@0	80 /* Maximum length of a timestamp used for strftime() */
jbe@0	81 #define MOONBR_LOG_MAXTIMELEN 40
jbe@0	82
jbe@0	83 /* Maximum length of a log message */
jbe@0	84 #define MOONBR_LOG_MAXMSGLEN 4095
jbe@0	85
jbe@0	86 /* Exitcodes passed to exit() call */
jbe@0	87 #define MOONBR_EXITCODE_GRACEFUL 0
jbe@0	88 #define MOONBR_EXITCODE_CMDLINEERROR 1
jbe@0	89 #define MOONBR_EXITCODE_ALREADYRUNNING 2
jbe@0	90 #define MOONBR_EXITCODE_STARTUPERROR 3
jbe@0	91 #define MOONBR_EXITCODE_RUNTIMEERROR 4
jbe@0	92
jbe@0	93 /* Maximum length of a line sent to stderr by child processes */
jbe@0	94 #define MOONBR_MAXERRORLINELEN 1024
jbe@0	95
jbe@0	96 /* Maximum length of an error string returned by strerror() */
jbe@0	97 #define MOONBR_MAXSTRERRORLEN 80
jbe@0	98
jbe@0	99 /* Status bytes exchanged between master and child processes */
jbe@124	100 #define MOONBR_STATUS_IDLE 'I'
jbe@124	101 #define MOONBR_COMMAND_CONNECT 'C'
jbe@124	102 #define MOONBR_COMMAND_TERMINATE 'T'
jbe@124	103 #define MOONBR_STATUS_GOODBYE 'B'
jbe@0	104
jbe@0	105 /* Constant file descriptors */
jbe@0	106 #define MOONBR_FD_STDERR 2
jbe@0	107 #define MOONBR_FD_CONTROL 3
jbe@0	108 #define MOONBR_FD_END 4
jbe@0	109
jbe@0	110 /* Return values of moonbr_try_destroy_worker() */
jbe@0	111 #define MOONBR_DESTROY_NONE 0
jbe@0	112 #define MOONBR_DESTROY_PREPARE 1
jbe@0	113 #define MOONBR_DESTROY_IDLE_OR_ASSIGNED 2
jbe@0	114
jbe@0	115
jbe@0	116 /* Types */
jbe@0	117
jbe@0	118 /* Enum for 'moonbr_pstate' */
jbe@0	119 #define MOONBR_PSTATE_STARTUP 0
jbe@0	120 #define MOONBR_PSTATE_RUNNING 1
jbe@0	121 #define MOONBR_PSTATE_FORKED 2
jbe@0	122
jbe@0	123 /* Enum for 'proto' field of struct moonbr_listener */
jbe@0	124 #define MOONBR_PROTO_INTERVAL 1
jbe@0	125 #define MOONBR_PROTO_LOCAL 2
jbe@0	126 #define MOONBR_PROTO_TCP6 3
jbe@0	127 #define MOONBR_PROTO_TCP4 4
jbe@0	128
jbe@0	129 /* Data structure for a pool's listener that can accept incoming connections */
jbe@0	130 struct moonbr_listener {
jbe@0	131 struct moonbr_pool *pool;
jbe@0	132 struct moonbr_listener prev_listener; / previous idle or(!) connected listener */
jbe@0	133 struct moonbr_listener next_listener; / next idle or(!) connected listener */
jbe@0	134 int proto;
jbe@0	135 union {
jbe@0	136 struct {
jbe@0	137 char name; / name of interval passed to 'connect' function as 'interval' field in table */
jbe@0	138 int strict; /* nonzero = runtime of 'connect' function does not delay interval */
jbe@0	139 struct timeval delay; /* interval between invocations of 'connect' function */
jbe@0	140 struct timeval wakeup; /* point in time of next invocation */
jbe@0	141 } interval;
jbe@0	142 struct {
jbe@0	143 char path; / full path name (i.e. filename with path) of UNIX domain socket */
jbe@0	144 } local;
jbe@0	145 struct {
jbe@0	146 int port; /* port number to listen on (in host endianess) */
jbe@0	147 int localhost_only; /* nonzero = listen on localhost only */
jbe@0	148 } tcp;
jbe@0	149 } proto_specific;
jbe@0	150 int listenfd; /* -1 = none */
jbe@0	151 int pollidx; /* -1 = none */
jbe@0	152 };
jbe@0	153
jbe@0	154 /* Data structure for a child process that is handling incoming connections */
jbe@0	155 struct moonbr_worker {
jbe@0	156 struct moonbr_pool *pool;
jbe@0	157 struct moonbr_worker *prev_worker;
jbe@0	158 struct moonbr_worker *next_worker;
jbe@0	159 struct moonbr_worker *prev_idle_worker;
jbe@0	160 struct moonbr_worker *next_idle_worker;
jbe@0	161 int idle; /* nonzero = waiting for command from parent process */
jbe@0	162 int assigned; /* nonzero = currently handling a connection */
jbe@0	163 pid_t pid;
jbe@0	164 int controlfd; /* socket to send/receive control message to/from child process */
jbe@0	165 int errorfd; /* socket to receive error output from child process' stderr */
jbe@0	166 char errorlinebuf; / optional buffer for collecting stderr data from child process */
jbe@0	167 int errorlinelen; /* number of bytes stored in 'errorlinebuf' */
jbe@0	168 int errorlineovf; /* nonzero = line length overflow */
jbe@0	169 struct timeval idle_expiration; /* point in time until child process may stay in idle state */
jbe@0	170 struct moonbr_listener restart_interval_listener; / set while interval listener is assigned */
jbe@0	171 };
jbe@0	172
jbe@0	173 /* Data structure for a pool of workers and listeners */
jbe@0	174 struct moonbr_pool {
jbe@0	175 int poolnum; /* number of pool for log output */
jbe@0	176 struct moonbr_pool next_pool; / next entry in linked list starting with 'moonbr_first_pool' */
jbe@0	177 struct moonbr_worker first_worker; / first worker of pool */
jbe@0	178 struct moonbr_worker last_worker; / last worker of pool */
jbe@0	179 struct moonbr_worker first_idle_worker; / first idle worker of pool */
jbe@0	180 struct moonbr_worker last_idle_worker; / last idle worker of pool */
jbe@0	181 int idle_worker_count;
jbe@0	182 int unassigned_worker_count;
jbe@0	183 int total_worker_count;
jbe@0	184 int worker_count_stat; /* only needed for statistics */
jbe@0	185 int pre_fork; /* desired minimum number of unassigned workers */
jbe@0	186 int min_fork; /* desired minimum number of workers in total */
jbe@0	187 int max_fork; /* maximum number of workers */
jbe@0	188 struct timeval fork_delay; /* delay after each fork() until a fork may happen again */
jbe@0	189 struct timeval fork_wakeup; /* point in time when a fork may happen again (unless a worker terminates before) */
jbe@0	190 struct timeval fork_error_delay; /* delay between fork()s when an error during fork or preparation occurred */
jbe@0	191 struct timeval fork_error_wakeup; /* point in time when fork may happen again if an error in preparation occurred */
jbe@0	192 int use_fork_error_wakeup; /* nonzero = error in preparation occured; gets reset on next fork */
jbe@0	193 struct timeval exit_delay; /* delay for terminating excessive workers (unassigned_worker_count > pre_fork) */
jbe@0	194 struct timeval exit_wakeup; /* point in time when terminating an excessive worker */
jbe@0	195 struct timeval idle_timeout; /* delay before an idle worker is terminated */
jbe@0	196 size_t memory_limit; /* maximum bytes of memory that the Lua machine may allocate */
jbe@0	197 int listener_count; /* total number of listeners of pool (and size of 'listener' array at end of this struct) */
jbe@0	198 struct moonbr_listener first_idle_listener; / first listener that is idle (i.e. has no waiting connection) */
jbe@0	199 struct moonbr_listener last_idle_listener; / last listener that is idle (i.e. has no waiting connection) */
jbe@0	200 struct moonbr_listener first_connected_listener; / first listener that has a pending connection */
jbe@0	201 struct moonbr_listener last_connected_listener; / last listener that has a pending connection */
jbe@0	202 struct moonbr_listener listener[1]; /* static array of variable(!) size to contain 'listener' structures */
jbe@0	203 };
jbe@0	204
jbe@0	205 /* Enum for 'channel' field of struct moonbr_poll_worker */
jbe@0	206 #define MOONBR_POLL_WORKER_CONTROLCHANNEL 1
jbe@0	207 #define MOONBR_POLL_WORKER_ERRORCHANNEL 2
jbe@0	208
jbe@0	209 /* Structure to refer from 'moonbr_poll_worker_fds' entry to worker structure */
jbe@0	210 struct moonbr_poll_worker {
jbe@0	211 struct moonbr_worker *worker;
jbe@0	212 int channel; /* field indicating whether file descriptor is 'controlfd' or 'errorfd' */
jbe@0	213 };
jbe@0	214
jbe@0	215 /* Variable indicating that clean shutdown was requested */
jbe@0	216 static int moonbr_shutdown_in_progress = 0;
jbe@0	217
jbe@0	218
jbe@0	219 /* Macros for Lua registry */
jbe@0	220
jbe@0	221 /* Lightuserdata keys for Lua registry to store 'prepare', 'connect', and 'finish' functions */
jbe@0	222 #define moonbr_luakey_prepare_func(pool) ((void *)(intptr_t)(pool) + 0)
jbe@0	223 #define moonbr_luakey_connect_func(pool) ((void *)(intptr_t)(pool) + 1)
jbe@0	224 #define moonbr_luakey_finish_func(pool) ((void *)(intptr_t)(pool) + 2)
jbe@0	225
jbe@0	226
jbe@0	227 /* Global variables */
jbe@0	228
jbe@0	229 /* State of process execution */
jbe@0	230 static int moonbr_pstate = MOONBR_PSTATE_STARTUP;
jbe@0	231
jbe@0	232 /* Process ID of the main process */
jbe@0	233 static pid_t moonbr_masterpid;
jbe@0	234
jbe@0	235 /* Condition variables set by the signal handler */
jbe@0	236 static volatile sig_atomic_t moonbr_cond_poll = 0;
jbe@0	237 static volatile sig_atomic_t moonbr_cond_terminate = 0;
jbe@0	238 static volatile sig_atomic_t moonbr_cond_interrupt = 0;
jbe@0	239 static volatile sig_atomic_t moonbr_cond_child = 0;
jbe@0	240
jbe@0	241 /* Socket pair to denote signal delivery when signal handler was called just before poll() */
jbe@0	242 static int moonbr_poll_signalfds[2];
jbe@0	243 #define moonbr_poll_signalfd_read moonbr_poll_signalfds[0]
jbe@0	244 #define moonbr_poll_signalfd_write moonbr_poll_signalfds[1]
jbe@0	245
jbe@0	246 /* Global variables for pidfile and logging */
jbe@0	247 static struct pidfh *moonbr_pidfh = NULL;
jbe@0	248 static FILE *moonbr_logfile = NULL;
jbe@0	249 static int moonbr_use_syslog = 0;
jbe@0	250
jbe@0	251 /* First and last entry of linked list of all created pools during initialization */
jbe@0	252 static struct moonbr_pool *moonbr_first_pool = NULL;
jbe@0	253 static struct moonbr_pool *moonbr_last_pool = NULL;
jbe@0	254
jbe@0	255 /* Total count of pools */
jbe@0	256 static int moonbr_pool_count = 0;
jbe@0	257
jbe@0	258 /* Set to a nonzero value if dynamic part of 'moonbr_poll_fds' ('moonbr_poll_worker_fds') needs an update */
jbe@0	259 static int moonbr_poll_refresh_needed = 0;
jbe@0	260
jbe@0	261 /* Array passed to poll(), consisting of static part and dynamic part ('moonbr_poll_worker_fds') */
jbe@0	262 static struct pollfd moonbr_poll_fds = NULL; / the array */
jbe@0	263 static int moonbr_poll_fds_bufsize = 0; /* memory allocated for this number of elements */
jbe@0	264 static int moonbr_poll_fds_count = 0; /* total number of elements */
jbe@0	265 static int moonbr_poll_fds_static_count; /* number of elements in static part */
jbe@0	266
jbe@0	267 /* Dynamic part of 'moonbr_poll_fds' array */
jbe@0	268 #define moonbr_poll_worker_fds (moonbr_poll_fds+moonbr_poll_fds_static_count)
jbe@0	269
jbe@0	270 /* Additional information for dynamic part of 'moonbr_poll_fds' array */
jbe@0	271 struct moonbr_poll_worker moonbr_poll_workers; / the array */
jbe@0	272 static int moonbr_poll_workers_bufsize = 0; /* memory allocated for this number of elements */
jbe@0	273 static int moonbr_poll_worker_count = 0; /* number of elements in array */
jbe@0	274
jbe@0	275 /* Variable set to nonzero value to disallow further calls of 'listen' function */
jbe@0	276 static int moonbr_booted = 0;
jbe@0	277
jbe@0	278 /* Verbosity settings */
jbe@0	279 static int moonbr_debug = 0;
jbe@0	280 static int moonbr_stat = 0;
jbe@0	281
jbe@0	282 /* Memory consumption by Lua machine */
jbe@0	283 static size_t moonbr_memory_usage = 0;
jbe@0	284 static size_t moonbr_memory_limit = 0;
jbe@0	285
jbe@0	286
jbe@0	287 /* Functions for signal handling */
jbe@0	288
jbe@0	289 /* Signal handler for master and child processes */
jbe@0	290 static void moonbr_signal(int sig) {
jbe@0	291 if (getpid() == moonbr_masterpid) {
jbe@0	292 /* master process */
jbe@0	293 switch (sig) {
jbe@0	294 case SIGHUP:
jbe@0	295 case SIGINT:
jbe@0	296 /* fast shutdown requested */
jbe@0	297 moonbr_cond_interrupt = 1;
jbe@0	298 break;
jbe@0	299 case SIGTERM:
jbe@0	300 /* clean shutdown requested */
jbe@0	301 moonbr_cond_terminate = 1;
jbe@0	302 break;
jbe@0	303 case SIGCHLD:
jbe@0	304 /* child process terminated */
jbe@0	305 moonbr_cond_child = 1;
jbe@0	306 break;
jbe@0	307 }
jbe@0	308 if (moonbr_cond_poll) {
jbe@0	309 /* avoid race condition if signal handler is invoked right before poll() */
jbe@0	310 char buf[1] = {0};
jbe@20	311 write(moonbr_poll_signalfd_write, buf, 1);
jbe@0	312 }
jbe@0	313 } else {
jbe@0	314 /* child process forwards certain signals to parent process */
jbe@0	315 switch (sig) {
jbe@0	316 case SIGHUP:
jbe@0	317 case SIGINT:
jbe@0	318 case SIGTERM:
jbe@0	319 kill(moonbr_masterpid, sig);
jbe@0	320 }
jbe@0	321 }
jbe@0	322 }
jbe@0	323
jbe@0	324 /* Initialize signal handling */
jbe@0	325 static void moonbr_signal_init(){
jbe@0	326 moonbr_masterpid = getpid();
jbe@0	327 signal(SIGHUP, moonbr_signal);
jbe@0	328 signal(SIGINT, moonbr_signal);
jbe@0	329 signal(SIGTERM, moonbr_signal);
jbe@0	330 signal(SIGCHLD, moonbr_signal);
jbe@0	331 }
jbe@0	332
jbe@0	333
jbe@0	334 /* Functions for logging in master process */
jbe@0	335
jbe@0	336 /* Logs a pre-formatted message with given syslog() priority */
jbe@0	337 static void moonbr_log_msg(int priority, const char *msg) {
jbe@0	338 if (moonbr_logfile) {
jbe@0	339 /* logging to logfile desired (timestamp is prepended in that case) */
jbe@0	340 time_t now_time = 0;
jbe@0	341 struct tm now_tmstruct;
jbe@0	342 char timestr[MOONBR_LOG_MAXTIMELEN+1];
jbe@0	343 time(&now_time);
jbe@0	344 localtime_r(&now_time, &now_tmstruct);
jbe@0	345 if (!strftime(
jbe@0	346 timestr, MOONBR_LOG_MAXTIMELEN+1, "%Y-%m-%d %H:%M:%S %Z: ", &now_tmstruct
jbe@0	347 )) timestr[0] = 0;
jbe@0	348 fprintf(moonbr_logfile, "%s%s\n", timestr, msg);
jbe@0	349 }
jbe@0	350 if (moonbr_use_syslog) {
jbe@0	351 /* logging through syslog desired */
jbe@0	352 syslog(priority, "%s", msg);
jbe@0	353 }
jbe@0	354 }
jbe@0	355
jbe@0	356 /* Formats a message via vsnprintf() and logs it with given syslog() priority */
jbe@0	357 static void moonbr_log(int priority, const char *message, ...) {
jbe@0	358 char msgbuf[MOONBR_LOG_MAXMSGLEN+1]; /* buffer of static size to store formatted message */
jbe@0	359 int msglen; /* length of full message (may exceed MOONBR_LOG_MAXMSGLEN) */
jbe@0	360 {
jbe@0	361 /* pass variable arguments to vsnprintf() to format message */
jbe@0	362 va_list ap;
jbe@0	363 va_start(ap, message);
jbe@0	364 msglen = vsnprintf(msgbuf, MOONBR_LOG_MAXMSGLEN+1, message, ap);
jbe@0	365 va_end(ap);
jbe@0	366 }
jbe@0	367 {
jbe@0	368 /* split and log message line by line */
jbe@0	369 char *line = msgbuf;
jbe@0	370 while (1) {
jbe@0	371 char *endptr = strchr(line, '\n');
jbe@0	372 if (endptr) {
jbe@0	373 /* terminate string where newline character is found */
jbe@0	374 *endptr = 0;
jbe@0	375 } else if (line != msgbuf && msglen > MOONBR_LOG_MAXMSGLEN) {
jbe@0	376 /* break if line is incomplete and not the first line */
jbe@0	377 break;
jbe@0	378 }
jbe@0	379 moonbr_log_msg(priority, line);
jbe@0	380 if (!endptr) break; /* break if end of formatted message is reached */
jbe@0	381 line = endptr+1; /* otherwise continue with remaining message */
jbe@0	382 }
jbe@0	383 }
jbe@0	384 if (msglen > MOONBR_LOG_MAXMSGLEN) {
jbe@0	385 /* print warning if message was truncated */
jbe@0	386 moonbr_log_msg(priority, "Previous log message has been truncated due to excessive length");
jbe@0	387 }
jbe@0	388 }
jbe@0	389
jbe@0	390
jbe@0	391 /* Termination function */
jbe@0	392
jbe@0	393 /* Kill all child processes, remove PID file (if existent), and exit master process with given exitcode */
jbe@0	394 static void moonbr_terminate(int exitcode) {
jbe@0	395 {
jbe@0	396 struct moonbr_pool *pool;
jbe@0	397 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
jbe@0	398 {
jbe@0	399 struct moonbr_worker *worker;
jbe@0	400 for (worker=pool->first_worker; worker; worker=worker->next_worker) {
jbe@0	401 moonbr_log(LOG_INFO, "Sending SIGKILL to child with PID %i", (int)worker->pid);
jbe@0	402 if (kill(worker->pid, SIGKILL)) {
jbe@0	403 moonbr_log(LOG_ERR, "Error while killing child process: %s", strerror(errno));
jbe@0	404 }
jbe@0	405 }
jbe@0	406 }
jbe@0	407 {
jbe@0	408 int i;
jbe@0	409 for (i=0; i<pool->listener_count; i++) {
jbe@0	410 struct moonbr_listener *listener = &pool->listener[i];
jbe@0	411 if (listener->proto == MOONBR_PROTO_LOCAL) {
jbe@0	412 moonbr_log(LOG_INFO, "Unlinking local socket \"%s\"", listener->proto_specific.local.path);
jbe@0	413 if (unlink(listener->proto_specific.local.path)) {
jbe@0	414 moonbr_log(LOG_ERR, "Error while unlinking local socket: %s", strerror(errno));
jbe@0	415 }
jbe@0	416 }
jbe@0	417 }
jbe@0	418 }
jbe@0	419 }
jbe@0	420 }
jbe@0	421 moonbr_log(exitcode ? LOG_ERR : LOG_NOTICE, "Terminating with exit code %i", exitcode);
jbe@0	422 if (moonbr_pidfh && pidfile_remove(moonbr_pidfh)) {
jbe@0	423 moonbr_log(LOG_ERR, "Error while removing PID file: %s", strerror(errno));
jbe@0	424 }
jbe@0	425 exit(exitcode);
jbe@0	426 }
jbe@0	427
jbe@0	428 /* Terminate with either MOONBR_EXITCODE_STARTUPERROR or MOONBR_EXITCODE_RUNTIMEERROR */
jbe@0	429 #define moonbr_terminate_error() \
jbe@0	430 moonbr_terminate( \
jbe@0	431 moonbr_pstate == MOONBR_PSTATE_STARTUP ? \
jbe@0	432 MOONBR_EXITCODE_STARTUPERROR : \
jbe@0	433 MOONBR_EXITCODE_RUNTIMEERROR \
jbe@0	434 )
jbe@0	435
jbe@0	436
jbe@0	437 /* Helper functions */
jbe@0	438
jbe@0	439 /* Fills a 'struct timeval' structure with the current time (using CLOCK_MONOTONIC) */
jbe@0	440 static void moonbr_now(struct timeval *now) {
jbe@0	441 struct timespec ts = {0, };
jbe@0	442 if (clock_gettime(CLOCK_MONOTONIC, &ts)) {
jbe@0	443 moonbr_log(LOG_CRIT, "Error in clock_gettime() call: %s", strerror(errno));
jbe@0	444 moonbr_terminate_error();
jbe@0	445 }
jbe@0	446 *now = (struct timeval){ .tv_sec = ts.tv_sec, .tv_usec = ts.tv_nsec / 1000 };
jbe@0	447 }
jbe@0	448
jbe@0	449 /* Formats a 'struct timeval' value (not thread-safe) */
jbe@0	450 static char moonbr_format_timeval(struct timeval t) {
jbe@0	451 static char buf[32];
jbe@0	452 snprintf(buf, 32, "%ji.%06ji seconds", (intmax_t)t->tv_sec, (intmax_t)t->tv_usec);
jbe@0	453 return buf;
jbe@0	454 }
jbe@0	455
jbe@0	456
jbe@0	457 /* Functions for pool creation and startup */
jbe@0	458
jbe@0	459 /* Creates a 'struct moonbr_pool' structure with a given number of listeners */
jbe@0	460 static struct moonbr_pool *moonbr_create_pool(int listener_count) {
jbe@0	461 struct moonbr_pool *pool;
jbe@0	462 pool = calloc(1,
jbe@0	463 sizeof(struct moonbr_pool) + /* size of 'struct moonbr_pool' with one listener */
jbe@0	464 (listener_count-1) * sizeof(struct moonbr_listener) /* size of extra listeners */
jbe@0	465 );
jbe@0	466 if (!pool) {
jbe@0	467 moonbr_log(LOG_CRIT, "Memory allocation error");
jbe@0	468 moonbr_terminate_error();
jbe@0	469 }
jbe@0	470 pool->listener_count = listener_count;
jbe@0	471 {
jbe@0	472 /* initialization of listeners */
jbe@0	473 int i;
jbe@0	474 for (i=0; i<listener_count; i++) {
jbe@0	475 struct moonbr_listener *listener = &pool->listener[i];
jbe@0	476 listener->pool = pool;
jbe@0	477 listener->listenfd = -1;
jbe@0	478 listener->pollidx = -1;
jbe@0	479 }
jbe@0	480 }
jbe@0	481 return pool;
jbe@0	482 }
jbe@0	483
jbe@0	484 /* Destroys a 'struct moonbr_pool' structure before it has been started */
jbe@0	485 static void moonbr_destroy_pool(struct moonbr_pool *pool) {
jbe@0	486 int i;
jbe@0	487 for (i=0; i<pool->listener_count; i++) {
jbe@0	488 struct moonbr_listener *listener = &pool->listener[i];
jbe@0	489 if (
jbe@0	490 listener->proto == MOONBR_PROTO_INTERVAL &&
jbe@0	491 listener->proto_specific.interval.name
jbe@0	492 ) {
jbe@0	493 free(listener->proto_specific.interval.name);
jbe@0	494 }
jbe@0	495 if (
jbe@0	496 listener->proto == MOONBR_PROTO_LOCAL &&
jbe@0	497 listener->proto_specific.local.path
jbe@0	498 ) {
jbe@0	499 free(listener->proto_specific.local.path);
jbe@0	500 }
jbe@0	501 }
jbe@0	502 free(pool);
jbe@0	503 }
jbe@0	504
jbe@0	505 /* Starts a all listeners in a pool */
jbe@0	506 static int moonbr_start_pool(struct moonbr_pool *pool) {
jbe@0	507 moonbr_log(LOG_INFO, "Creating pool", pool->poolnum);
jbe@0	508 {
jbe@0	509 int i;
jbe@0	510 for (i=0; i<pool->listener_count; i++) {
jbe@0	511 struct moonbr_listener *listener = &pool->listener[i];
jbe@0	512 switch (listener->proto) {
jbe@0	513 case MOONBR_PROTO_INTERVAL:
jbe@17	514 /* nothing to do here: starting intervals is performed in moonbr_run() function */
jbe@0	515 if (!listener->proto_specific.interval.name) {
jbe@0	516 moonbr_log(LOG_INFO, "Adding unnamed interval listener");
jbe@0	517 } else {
jbe@0	518 moonbr_log(LOG_INFO, "Adding interval listener \"%s\"", listener->proto_specific.interval.name);
jbe@0	519 }
jbe@0	520 break;
jbe@0	521 case MOONBR_PROTO_LOCAL:
jbe@0	522 moonbr_log(LOG_INFO, "Adding local socket listener for path \"%s\"", listener->proto_specific.local.path);
jbe@0	523 {
jbe@0	524 struct sockaddr_un servaddr = { .sun_family = AF_UNIX };
jbe@0	525 const int path_maxlen = sizeof(struct sockaddr_un) - (
jbe@110	526 (void )servaddr.sun_path - (void )&servaddr
jbe@0	527 );
jbe@0	528 if (
jbe@0	529 snprintf(
jbe@0	530 servaddr.sun_path,
jbe@0	531 path_maxlen,
jbe@0	532 "%s",
jbe@0	533 listener->proto_specific.local.path
jbe@0	534 ) >= path_maxlen
jbe@0	535 ) {
jbe@0	536 errno = ENAMETOOLONG;
jbe@0	537 };
jbe@0	538 listener->listenfd = socket(PF_LOCAL, SOCK_STREAM\|SOCK_CLOEXEC\|SOCK_NONBLOCK, 0);
jbe@0	539 if (listener->listenfd == -1) goto moonbr_start_pool_error;
jbe@0	540 if (!unlink(listener->proto_specific.local.path)) {
jbe@0	541 moonbr_log(LOG_WARNING, "Unlinked named socket \"%s\" prior to listening", listener->proto_specific.local.path);
jbe@0	542 } else {
jbe@0	543 if (errno != ENOENT) {
jbe@0	544 moonbr_log(LOG_ERR, "Could not unlink named socket \"%s\" prior to listening: %s", listener->proto_specific.local.path, strerror(errno));
jbe@0	545 }
jbe@0	546 }
jbe@0	547 if (
jbe@0	548 bind(listener->listenfd, (struct sockaddr *)&servaddr, sizeof(servaddr))
jbe@0	549 ) goto moonbr_start_pool_error;
jbe@0	550 if (listen(listener->listenfd, MOONBR_LISTEN_BACKLOG)) goto moonbr_start_pool_error;
jbe@0	551 }
jbe@0	552 break;
jbe@0	553 case MOONBR_PROTO_TCP6:
jbe@0	554 if (listener->proto_specific.tcp.localhost_only) {
jbe@0	555 moonbr_log(LOG_INFO, "Adding localhost TCP/IPv6 listener on port %i", listener->proto_specific.tcp.port);
jbe@0	556 } else {
jbe@0	557 moonbr_log(LOG_INFO, "Adding public TCP/IPv6 listener on port %i", listener->proto_specific.tcp.port);
jbe@0	558 }
jbe@0	559 {
jbe@0	560 struct sockaddr_in6 servaddr = {
jbe@0	561 .sin6_family = AF_INET6,
jbe@0	562 .sin6_port = htons(listener->proto_specific.tcp.port)
jbe@0	563 };
jbe@0	564 listener->listenfd = socket(PF_INET6, SOCK_STREAM\|SOCK_CLOEXEC\|SOCK_NONBLOCK, 0);
jbe@0	565 if (listener->listenfd == -1) goto moonbr_start_pool_error;
jbe@0	566 {
jbe@0	567 /* avoid "Address already in use" error when restarting service */
jbe@0	568 static const int reuseval = 1;
jbe@0	569 if (setsockopt(
jbe@0	570 listener->listenfd, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval)
jbe@0	571 )) goto moonbr_start_pool_error;
jbe@0	572 }
jbe@0	573 {
jbe@0	574 /* default to send TCP RST when process terminates unexpectedly */
jbe@0	575 static const struct linger lingerval = {
jbe@0	576 .l_onoff = 1,
jbe@0	577 .l_linger = 0
jbe@0	578 };
jbe@0	579 if (setsockopt(
jbe@0	580 listener->listenfd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval)
jbe@0	581 )) goto moonbr_start_pool_error;
jbe@0	582 }
jbe@0	583 if (listener->proto_specific.tcp.localhost_only) {
jbe@0	584 servaddr.sin6_addr.s6_addr[15] = 1;
jbe@0	585 }
jbe@0	586 if (
jbe@0	587 bind(listener->listenfd, (struct sockaddr *)&servaddr, sizeof(servaddr))
jbe@0	588 ) goto moonbr_start_pool_error;
jbe@0	589 if (listen(listener->listenfd, MOONBR_LISTEN_BACKLOG)) goto moonbr_start_pool_error;
jbe@0	590 }
jbe@0	591 break;
jbe@0	592 case MOONBR_PROTO_TCP4:
jbe@0	593 if (listener->proto_specific.tcp.localhost_only) {
jbe@0	594 moonbr_log(LOG_INFO, "Adding localhost TCP/IPv4 listener on port %i", listener->proto_specific.tcp.port);
jbe@0	595 } else {
jbe@0	596 moonbr_log(LOG_INFO, "Adding public TCP/IPv4 listener on port %i", listener->proto_specific.tcp.port);
jbe@0	597 }
jbe@0	598 {
jbe@0	599 struct sockaddr_in servaddr = {
jbe@0	600 .sin_family = AF_INET,
jbe@0	601 .sin_port = htons(listener->proto_specific.tcp.port)
jbe@0	602 };
jbe@0	603 listener->listenfd = socket(PF_INET, SOCK_STREAM\|SOCK_CLOEXEC\|SOCK_NONBLOCK, 0);
jbe@0	604 if (listener->listenfd == -1) goto moonbr_start_pool_error;
jbe@0	605 {
jbe@0	606 /* avoid "Address already in use" error when restarting service */
jbe@0	607 static const int reuseval = 1;
jbe@0	608 if (setsockopt(
jbe@0	609 listener->listenfd, SOL_SOCKET, SO_REUSEADDR, &reuseval, sizeof(reuseval)
jbe@0	610 )) goto moonbr_start_pool_error;
jbe@0	611 }
jbe@0	612 {
jbe@0	613 /* default to send TCP RST when process terminates unexpectedly */
jbe@0	614 static const struct linger lingerval = {
jbe@0	615 .l_onoff = 1,
jbe@0	616 .l_linger = 0
jbe@0	617 };
jbe@0	618 if (setsockopt(
jbe@0	619 listener->listenfd, SOL_SOCKET, SO_LINGER, &lingerval, sizeof(lingerval)
jbe@0	620 )) goto moonbr_start_pool_error;
jbe@0	621 }
jbe@0	622 if (listener->proto_specific.tcp.localhost_only) {
jbe@0	623 ((uint8_t *)&servaddr.sin_addr.s_addr)[0] = 127;
jbe@0	624 ((uint8_t *)&servaddr.sin_addr.s_addr)[3] = 1;
jbe@0	625 }
jbe@0	626 if (
jbe@0	627 bind(listener->listenfd, (struct sockaddr *)&servaddr, sizeof(servaddr))
jbe@0	628 ) goto moonbr_start_pool_error;
jbe@0	629 if (listen(listener->listenfd, MOONBR_LISTEN_BACKLOG)) goto moonbr_start_pool_error;
jbe@0	630 }
jbe@0	631 break;
jbe@0	632 default:
jbe@0	633 moonbr_log(LOG_CRIT, "Internal error (should not happen): Unexpected value in listener.proto field");
jbe@0	634 moonbr_terminate_error();
jbe@0	635 }
jbe@0	636 }
jbe@0	637 goto moonbr_start_pool_ok;
jbe@0	638 moonbr_start_pool_error:
jbe@0	639 {
jbe@0	640 int j = i;
jbe@0	641 int errno2 = errno;
jbe@0	642 for (; i>=0; i--) {
jbe@0	643 struct moonbr_listener *listener = &pool->listener[i];
jbe@0	644 if (listener->listenfd != -1) close(listener->listenfd);
jbe@0	645 }
jbe@0	646 errno = errno2;
jbe@0	647 return j;
jbe@0	648 }
jbe@0	649 }
jbe@0	650 moonbr_start_pool_ok:
jbe@0	651 pool->poolnum = ++moonbr_pool_count;
jbe@0	652 moonbr_log(LOG_INFO, "Pool #%i created", pool->poolnum);
jbe@0	653 if (moonbr_last_pool) moonbr_last_pool->next_pool = pool;
jbe@0	654 else moonbr_first_pool = pool;
jbe@0	655 moonbr_last_pool = pool;
jbe@0	656 return -1;
jbe@0	657 }
jbe@0	658
jbe@0	659
jbe@0	660 /*** Function to send data and a file descriptor to child process */
jbe@0	661
jbe@0	662 /* Sends control message of one bye plus optional file descriptor plus optional pointer to child process */
jbe@0	663 static void moonbr_send_control_message(struct moonbr_worker worker, char status, int fd, void ptr) {
jbe@0	664 {
jbe@0	665 struct iovec iovector = { .iov_base = &status, .iov_len = 1 }; /* carrying status byte */
jbe@0	666 char control_message_buffer[CMSG_SPACE(sizeof(int))] = {0, }; /* used to transfer file descriptor */
jbe@0	667 struct msghdr message = { .msg_iov = &iovector, .msg_iovlen = 1 }; /* data structure passed to sendmsg() call */
jbe@0	668 if (moonbr_debug) {
jbe@0	669 if (fd == -1) {
jbe@0	670 moonbr_log(LOG_DEBUG, "Sending control message \"%c\" to child process in pool #%i (PID %i)", (int)status, worker->pool->poolnum, (int)worker->pid);
jbe@0	671 } else {
jbe@0	672 moonbr_log(LOG_DEBUG, "Sending control message \"%c\" with file descriptor #%i to child process in pool #%i (PID %i)", (int)status, fd, worker->pool->poolnum, (int)worker->pid);
jbe@0	673 }
jbe@0	674 }
jbe@0	675 if (fd != -1) {
jbe@0	676 /* attach control message with file descriptor */
jbe@0	677 message.msg_control = control_message_buffer;
jbe@0	678 message.msg_controllen = CMSG_SPACE(sizeof(int));
jbe@0	679 {
jbe@0	680 struct cmsghdr *control_message = CMSG_FIRSTHDR(&message);
jbe@0	681 control_message->cmsg_level = SOL_SOCKET;
jbe@0	682 control_message->cmsg_type = SCM_RIGHTS;
jbe@0	683 control_message->cmsg_len = CMSG_LEN(sizeof(int));
jbe@18	684 memcpy(CMSG_DATA(control_message), &fd, sizeof(int));
jbe@0	685 }
jbe@0	686 }
jbe@0	687 while (sendmsg(worker->controlfd, &message, MSG_NOSIGNAL) < 0) {
jbe@0	688 if (errno == EPIPE) {
jbe@0	689 moonbr_log(LOG_ERR, "Error while communicating with idle child process in pool #%i (PID %i): %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
jbe@0	690 return; /* do not close socket; socket is closed when reading from it */
jbe@0	691 }
jbe@0	692 if (errno != EINTR) {
jbe@0	693 moonbr_log(LOG_CRIT, "Unexpected error while communicating with idle child process in pool #%i (PID %i): %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
jbe@0	694 moonbr_terminate_error();
jbe@0	695 }
jbe@0	696 }
jbe@0	697 }
jbe@0	698 if (ptr) {
jbe@0	699 char buf[sizeof(void *)];
jbe@0	700 char *pos = buf;
jbe@0	701 int len = sizeof(void *);
jbe@0	702 ssize_t written;
jbe@0	703 if (moonbr_debug) {
jbe@0	704 moonbr_log(LOG_DEBUG, "Sending memory pointer to child process in pool #%i (PID %i)", (int)status, worker->pool->poolnum, (int)worker->pid);
jbe@0	705 }
jbe@18	706 memcpy(buf, &ptr, sizeof(void *));
jbe@0	707 while (len) {
jbe@0	708 written = send(worker->controlfd, pos, len, MSG_NOSIGNAL);
jbe@0	709 if (written > 0) {
jbe@0	710 pos += written;
jbe@0	711 len -= written;
jbe@0	712 } else if (errno == EPIPE) {
jbe@0	713 moonbr_log(LOG_ERR, "Error while communicating with idle child process in pool #%i (PID %i): %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
jbe@0	714 return; /* do not close socket; socket is closed when reading from it */
jbe@0	715 } else if (errno != EINTR) {
jbe@0	716 moonbr_log(LOG_CRIT, "Unexpected error while communicating with idle child process in pool #%i (PID %i): %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
jbe@0	717 moonbr_terminate_error();
jbe@0	718 }
jbe@0	719 }
jbe@0	720 }
jbe@0	721 }
jbe@0	722
jbe@0	723
jbe@0	724 /* Functions running in child process */
jbe@0	725
jbe@0	726 /* Logs an error in child process */
jbe@0	727 static void moonbr_child_log(const char *message) {
jbe@0	728 fprintf(stderr, "%s\n", message);
jbe@0	729 }
jbe@0	730
jbe@0	731 /* Logs a fatal error in child process and terminates process with error status */
jbe@0	732 static void moonbr_child_log_fatal(const char *message) {
jbe@0	733 moonbr_child_log(message);
jbe@0	734 exit(1);
jbe@0	735 }
jbe@0	736
jbe@0	737 /* Logs an error in child process while appending error string for global errno variable */
jbe@0	738 static void moonbr_child_log_errno(const char *message) {
jbe@0	739 char errmsg[MOONBR_MAXSTRERRORLEN];
jbe@20	740 strerror_r(errno, errmsg, MOONBR_MAXSTRERRORLEN); /* use thread-safe call in case child created threads */
jbe@0	741 fprintf(stderr, "%s: %s\n", message, errmsg);
jbe@0	742 }
jbe@0	743
jbe@0	744 /* Logs a fatal error in child process while appending error string for errno and terminating process */
jbe@0	745 static void moonbr_child_log_errno_fatal(const char *message) {
jbe@0	746 moonbr_child_log_errno(message);
jbe@0	747 exit(1);
jbe@0	748 }
jbe@0	749
jbe@0	750 /* Receives a control message consisting of one character plus an optional file descriptor from parent process */
jbe@0	751 static void moonbr_child_receive_control_message(int socketfd, char status, int fd) {
jbe@0	752 struct iovec iovector = { .iov_base = status, .iov_len = 1 }; /* reference to status byte variable */
jbe@0	753 char control_message_buffer[CMSG_SPACE(sizeof(int))] = {0, }; /* used to receive file descriptor */
jbe@0	754 struct msghdr message = { /* data structure passed to recvmsg() call */
jbe@0	755 .msg_iov = &iovector,
jbe@0	756 .msg_iovlen = 1,
jbe@0	757 .msg_control = control_message_buffer,
jbe@0	758 .msg_controllen = CMSG_SPACE(sizeof(int))
jbe@0	759 };
jbe@0	760 {
jbe@0	761 int received;
jbe@0	762 while ((received = recvmsg(socketfd, &message, MSG_CMSG_CLOEXEC)) < 0) {
jbe@0	763 if (errno != EINTR) {
jbe@0	764 moonbr_child_log_errno_fatal("Error while trying to receive connection socket from parent process");
jbe@0	765 }
jbe@0	766 }
jbe@0	767 if (!received) {
jbe@0	768 moonbr_child_log_fatal("Unexpected EOF while trying to receive connection socket from parent process");
jbe@0	769 }
jbe@0	770 }
jbe@0	771 {
jbe@0	772 struct cmsghdr *control_message = CMSG_FIRSTHDR(&message);
jbe@0	773 if (control_message) {
jbe@0	774 if (control_message->cmsg_level != SOL_SOCKET) {
jbe@0	775 moonbr_child_log_fatal("Received control message with cmsg_level not equal to SOL_SOCKET");
jbe@0	776 }
jbe@0	777 if (control_message->cmsg_type != SCM_RIGHTS) {
jbe@0	778 moonbr_child_log_fatal("Received control message with cmsg_type not equal to SCM_RIGHTS");
jbe@0	779 }
jbe@18	780 memcpy(fd, CMSG_DATA(control_message), sizeof(int));
jbe@0	781 } else {
jbe@0	782 *fd = -1;
jbe@0	783 }
jbe@0	784 }
jbe@0	785 }
jbe@0	786
jbe@0	787 /* Receives a pointer from parent process */
jbe@0	788 static void *moonbr_child_receive_pointer(int socketfd) {
jbe@0	789 char buf[sizeof(void *)];
jbe@0	790 char *pos = buf;
jbe@0	791 int len = sizeof(void *);
jbe@0	792 ssize_t bytes_read;
jbe@0	793 while (len) {
jbe@0	794 bytes_read = recv(socketfd, pos, len, 0);
jbe@0	795 if (bytes_read > 0) {
jbe@0	796 pos += bytes_read;
jbe@0	797 len -= bytes_read;
jbe@0	798 } else if (!bytes_read) {
jbe@0	799 moonbr_child_log_fatal("Unexpected EOF while trying to receive memory pointer from parent process");
jbe@0	800 } else if (errno != EINTR) {
jbe@0	801 moonbr_child_log_errno_fatal("Error while trying to receive memory pointer from parent process");
jbe@0	802 }
jbe@0	803 }
jbe@18	804 {
jbe@18	805 void ptr; / avoid breaking strict-aliasing rules */
jbe@18	806 memcpy(&ptr, buf, sizeof(void *));
jbe@18	807 return ptr;
jbe@18	808 }
jbe@0	809 }
jbe@0	810
jbe@0	811 /* Main function of child process to be called after fork() and file descriptor rearrangement */
jbe@0	812 void moonbr_child_run(struct moonbr_pool pool, lua_State L) {
jbe@0	813 char controlmsg;
jbe@88	814 int fd;
jbe@0	815 struct itimerval notimer = { { 0, }, { 0, } };
jbe@0	816 lua_rawgetp(L, LUA_REGISTRYINDEX, moonbr_luakey_prepare_func(pool));
jbe@0	817 if (lua_isnil(L, -1)) lua_pop(L, 1);
jbe@0	818 else if (lua_pcall(L, 0, 0, 1)) {
jbe@0	819 fprintf(stderr, "Error in \"prepare\" function: %s\n", lua_tostring(L, -1));
jbe@0	820 exit(1);
jbe@0	821 }
jbe@0	822 while (1) {
jbe@0	823 struct moonbr_listener *listener;
jbe@0	824 if (setitimer(ITIMER_REAL, &notimer, NULL)) {
jbe@0	825 moonbr_child_log_errno_fatal("Could not reset ITIMER_REAL via setitimer()");
jbe@0	826 }
jbe@0	827 controlmsg = MOONBR_STATUS_IDLE;
jbe@0	828 if (write(MOONBR_FD_CONTROL, &controlmsg, 1) <= 0) {
jbe@0	829 moonbr_child_log_errno_fatal("Error while sending ready message to parent process");
jbe@0	830 }
jbe@88	831 moonbr_child_receive_control_message(MOONBR_FD_CONTROL, &controlmsg, &fd);
jbe@0	832 if (!(
jbe@124	833 (controlmsg == MOONBR_COMMAND_TERMINATE && fd == -1) \|\|
jbe@124	834 (controlmsg == MOONBR_COMMAND_CONNECT)
jbe@0	835 )) {
jbe@0	836 moonbr_child_log_fatal("Received illegal control message from parent process");
jbe@0	837 }
jbe@0	838 if (controlmsg == MOONBR_COMMAND_TERMINATE) break;
jbe@0	839 listener = moonbr_child_receive_pointer(MOONBR_FD_CONTROL);
jbe@124	840 if (listener->proto == MOONBR_PROTO_INTERVAL && fd >= 0) {
jbe@124	841 moonbr_child_log_fatal("Received unexpected file descriptor from parent process");
jbe@124	842 } else if (listener->proto != MOONBR_PROTO_INTERVAL && fd < 0) {
jbe@124	843 moonbr_child_log_fatal("Missing file descriptor from parent process");
jbe@124	844 }
jbe@119	845 if (fd >= 0) moonbr_io_pushhandle(L, fd);
jbe@0	846 lua_rawgetp(L, LUA_REGISTRYINDEX, moonbr_luakey_connect_func(pool));
jbe@119	847 if (fd < 0) {
jbe@0	848 lua_newtable(L);
jbe@0	849 lua_pushstring(L,
jbe@0	850 listener->proto_specific.interval.name ?
jbe@0	851 listener->proto_specific.interval.name : ""
jbe@0	852 );
jbe@0	853 lua_setfield(L, -2, "interval");
jbe@0	854 } else {
jbe@88	855 lua_pushvalue(L, -2);
jbe@0	856 }
jbe@0	857 if (lua_pcall(L, 1, 1, 1)) {
jbe@0	858 fprintf(stderr, "Error in \"connect\" function: %s\n", lua_tostring(L, -1));
jbe@0	859 exit(1);
jbe@0	860 }
jbe@119	861 if (fd >= 0) moonbr_io_closehandle(L, -2, 0); /* attemt clean close */
jbe@0	862 if (lua_type(L, -1) != LUA_TBOOLEAN \|\| !lua_toboolean(L, -1)) break;
jbe@0	863 #ifdef MOONBR_LUA_PANIC_BUG_WORKAROUND
jbe@0	864 lua_settop(L, 2);
jbe@0	865 #else
jbe@0	866 lua_settop(L, 1);
jbe@0	867 #endif
jbe@0	868 }
jbe@0	869 controlmsg = MOONBR_STATUS_GOODBYE;
jbe@0	870 if (write(MOONBR_FD_CONTROL, &controlmsg, 1) <= 0) {
jbe@0	871 moonbr_child_log_errno_fatal("Error while sending goodbye message to parent process");
jbe@0	872 }
jbe@0	873 if (close(MOONBR_FD_CONTROL) && errno != EINTR) {
jbe@0	874 moonbr_child_log_errno("Error while closing control socket");
jbe@0	875 }
jbe@0	876 lua_rawgetp(L, LUA_REGISTRYINDEX, moonbr_luakey_finish_func(pool));
jbe@0	877 if (lua_isnil(L, -1)) lua_pop(L, 1);
jbe@0	878 else if (lua_pcall(L, 0, 0, 1)) {
jbe@0	879 fprintf(stderr, "Error in \"finish\" function: %s\n", lua_tostring(L, -1));
jbe@0	880 exit(1);
jbe@0	881 }
jbe@0	882 lua_close(L);
jbe@0	883 exit(0);
jbe@0	884 }
jbe@0	885
jbe@0	886
jbe@0	887 /* Functions to spawn child process */
jbe@0	888
jbe@0	889 /* Helper function to send an error message to a file descriptor (not needing a file stream) */
jbe@0	890 static void moonbr_child_emergency_print(int fd, char *message) {
jbe@0	891 size_t len = strlen(message);
jbe@0	892 ssize_t written;
jbe@0	893 while (len) {
jbe@0	894 written = write(fd, message, len);
jbe@0	895 if (written > 0) {
jbe@0	896 message += written;
jbe@0	897 len -= written;
jbe@0	898 } else {
jbe@0	899 if (written != -1 \|\| errno != EINTR) break;
jbe@0	900 }
jbe@0	901 }
jbe@0	902 }
jbe@0	903
jbe@0	904 /* Helper function to send an error message plus a text for errno to a file descriptor and terminate the process */
jbe@0	905 static void moonbr_child_emergency_error(int fd, char *message) {
jbe@0	906 int errno2 = errno;
jbe@0	907 moonbr_child_emergency_print(fd, message);
jbe@0	908 moonbr_child_emergency_print(fd, ": ");
jbe@0	909 moonbr_child_emergency_print(fd, strerror(errno2));
jbe@0	910 moonbr_child_emergency_print(fd, "\n");
jbe@0	911 exit(1);
jbe@0	912 }
jbe@0	913
jbe@0	914 /* Creates a child process and (in case of success) registers it in the 'struct moonbr_pool' structure */
jbe@0	915 static int moonbr_create_worker(struct moonbr_pool pool, lua_State L) {
jbe@0	916 struct moonbr_worker *worker;
jbe@0	917 worker = calloc(1, sizeof(struct moonbr_worker));
jbe@0	918 if (!worker) {
jbe@0	919 moonbr_log(LOG_CRIT, "Memory allocation error");
jbe@0	920 return -1;
jbe@0	921 }
jbe@0	922 worker->pool = pool;
jbe@0	923 {
jbe@0	924 int controlfds[2];
jbe@0	925 int errorfds[2];
jbe@0	926 if (socketpair(PF_LOCAL, SOCK_STREAM \| SOCK_CLOEXEC, 0, controlfds)) {
jbe@0	927 moonbr_log(LOG_ERR, "Could not create control socket pair for communcation with child process: %s", strerror(errno));
jbe@0	928 free(worker);
jbe@0	929 return -1;
jbe@0	930 }
jbe@0	931 if (socketpair(PF_LOCAL, SOCK_STREAM \| SOCK_CLOEXEC, 0, errorfds)) {
jbe@0	932 moonbr_log(LOG_ERR, "Could not create socket pair to redirect stderr of child process: %s", strerror(errno));
jbe@0	933 close(controlfds[0]);
jbe@0	934 close(controlfds[1]);
jbe@0	935 free(worker);
jbe@0	936 return -1;
jbe@0	937 }
jbe@0	938 if (moonbr_logfile && fflush(moonbr_logfile)) {
jbe@0	939 moonbr_log(LOG_CRIT, "Could not flush log file prior to forking: %s", strerror(errno));
jbe@0	940 moonbr_terminate_error();
jbe@0	941 }
jbe@0	942 worker->pid = fork();
jbe@0	943 if (worker->pid == -1) {
jbe@0	944 moonbr_log(LOG_ERR, "Could not fork: %s", strerror(errno));
jbe@0	945 close(controlfds[0]);
jbe@0	946 close(controlfds[1]);
jbe@0	947 close(errorfds[0]);
jbe@0	948 close(errorfds[1]);
jbe@0	949 free(worker);
jbe@0	950 return -1;
jbe@0	951 } else if (!worker->pid) {
jbe@0	952 moonbr_pstate = MOONBR_PSTATE_FORKED;
jbe@0	953 #ifdef MOONBR_LUA_PANIC_BUG_WORKAROUND
jbe@0	954 lua_pushliteral(L, "Failed to pass error message due to bug in Lua panic handler (hint: not enough memory?)");
jbe@0	955 #endif
jbe@0	956 moonbr_memory_limit = pool->memory_limit;
jbe@0	957 if (moonbr_pidfh && pidfile_close(moonbr_pidfh)) {
jbe@0	958 moonbr_child_emergency_error(errorfds[1], "Could not close PID file in forked child process");
jbe@0	959 }
jbe@0	960 if (moonbr_logfile && moonbr_logfile != stderr && fclose(moonbr_logfile)) {
jbe@0	961 moonbr_child_emergency_error(errorfds[1], "Could not close log file in forked child process");
jbe@0	962 }
jbe@0	963 if (dup2(errorfds[1], MOONBR_FD_STDERR) == -1) {
jbe@0	964 moonbr_child_emergency_error(errorfds[1], "Could not duplicate socket to stderr file descriptor");
jbe@0	965 }
jbe@0	966 if (dup2(controlfds[1], MOONBR_FD_CONTROL) == -1) {
jbe@0	967 moonbr_child_emergency_error(errorfds[1], "Could not duplicate control socket");
jbe@0	968 }
jbe@0	969 closefrom(MOONBR_FD_END);
jbe@0	970 moonbr_child_run(pool, L);
jbe@0	971 }
jbe@0	972 if (moonbr_stat) {
jbe@0	973 moonbr_log(LOG_INFO, "Created new worker in pool #%i with PID %i", worker->pool->poolnum, (int)worker->pid);
jbe@0	974 }
jbe@0	975 worker->controlfd = controlfds[0];
jbe@0	976 worker->errorfd = errorfds[0];
jbe@0	977 if (close(controlfds[1]) && errno != EINTR) {
jbe@0	978 moonbr_log(LOG_CRIT, "Could not close opposite end of control file descriptor after forking");
jbe@0	979 moonbr_terminate_error();
jbe@0	980 }
jbe@0	981 if (close(errorfds[1]) && errno != EINTR) {
jbe@0	982 moonbr_log(LOG_CRIT, "Could not close opposite end of control file descriptor after forking");
jbe@0	983 moonbr_terminate_error();
jbe@0	984 }
jbe@0	985 }
jbe@0	986 worker->prev_worker = pool->last_worker;
jbe@0	987 if (worker->prev_worker) worker->prev_worker->next_worker = worker;
jbe@0	988 else pool->first_worker = worker;
jbe@0	989 pool->last_worker = worker;
jbe@0	990 pool->unassigned_worker_count++;
jbe@0	991 pool->total_worker_count++;
jbe@0	992 pool->worker_count_stat = 1;
jbe@0	993 moonbr_poll_refresh_needed = 1;
jbe@0	994 return 0; /* return zero only in case of success */
jbe@0	995 }
jbe@0	996
jbe@0	997
jbe@0	998 /* Functions to handle previously created 'struct moonbr_worker' structures */
jbe@0	999
jbe@0	1000 #define moonbr_try_destroy_worker_stat(str, field) \
jbe@0	1001 moonbr_log(LOG_INFO, "Resource usage in pool #%i for PID %i: " str " %li", worker->pool->poolnum, (int)worker->pid, (long)childusage.field);
jbe@0	1002
jbe@0	1003 /* Destroys a worker structure if socket connections have been closed and child process has terminated */
jbe@0	1004 static int moonbr_try_destroy_worker(struct moonbr_worker *worker) {
jbe@0	1005 if (worker->controlfd != -1 \|\| worker->errorfd != -1) return MOONBR_DESTROY_NONE;
jbe@0	1006 {
jbe@0	1007 int childstatus;
jbe@0	1008 struct rusage childusage;
jbe@0	1009 {
jbe@0	1010 pid_t waitedpid;
jbe@0	1011 while (
jbe@0	1012 (waitedpid = wait4(worker->pid, &childstatus, WNOHANG, &childusage)) == -1
jbe@0	1013 ) {
jbe@0	1014 if (errno != EINTR) {
jbe@0	1015 moonbr_log(LOG_CRIT, "Error in wait4() call: %s", strerror(errno));
jbe@0	1016 moonbr_terminate_error();
jbe@0	1017 }
jbe@0	1018 }
jbe@0	1019 if (!waitedpid) return 0; /* return 0 if worker couldn't be destroyed */
jbe@0	1020 if (waitedpid != worker->pid) {
jbe@0	1021 moonbr_log(LOG_CRIT, "Wrong PID returned by wait4() call");
jbe@0	1022 moonbr_terminate_error();
jbe@0	1023 }
jbe@0	1024 }
jbe@0	1025 if (WIFEXITED(childstatus)) {
jbe@0	1026 if (WEXITSTATUS(childstatus) \|\| moonbr_stat) {
jbe@0	1027 moonbr_log(
jbe@0	1028 WEXITSTATUS(childstatus) ? LOG_WARNING : LOG_INFO,
jbe@0	1029 "Child process in pool #%i with PID %i returned with exit code %i", worker->pool->poolnum, (int)worker->pid, WEXITSTATUS(childstatus)
jbe@0	1030 );
jbe@0	1031 }
jbe@0	1032 } else if (WIFSIGNALED(childstatus)) {
jbe@0	1033 if (WCOREDUMP(childstatus)) {
jbe@0	1034 moonbr_log(LOG_ERR, "Child process in pool #%i with PID %i died from signal %i (core dump was created)", worker->pool->poolnum, (int)worker->pid, WTERMSIG(childstatus));
jbe@0	1035 } else if (WTERMSIG(childstatus) == SIGALRM) {
jbe@0	1036 moonbr_log(LOG_WARNING, "Child process in pool #%i with PID %i exited prematurely due to timeout", worker->pool->poolnum, (int)worker->pid);
jbe@0	1037 } else {
jbe@0	1038 moonbr_log(LOG_ERR, "Child process in pool #%i with PID %i died from signal %i", worker->pool->poolnum, (int)worker->pid, WTERMSIG(childstatus));
jbe@0	1039 }
jbe@0	1040 } else {
jbe@0	1041 moonbr_log(LOG_CRIT, "Illegal exit status from child process in pool #%i with PID %i", worker->pool->poolnum, (int)worker->pid);
jbe@0	1042 moonbr_terminate_error();
jbe@0	1043 }
jbe@0	1044 if (moonbr_stat) {
jbe@0	1045 moonbr_log(LOG_INFO, "Resource usage in pool #%i for PID %i: user time %s", worker->pool->poolnum, (int)worker->pid, moonbr_format_timeval(&childusage.ru_utime));
jbe@0	1046 moonbr_log(LOG_INFO, "Resource usage in pool #%i for PID %i: system time %s", worker->pool->poolnum, (int)worker->pid, moonbr_format_timeval(&childusage.ru_stime));
jbe@0	1047 moonbr_try_destroy_worker_stat("max resident set size", ru_maxrss);
jbe@0	1048 moonbr_try_destroy_worker_stat("integral shared memory size", ru_ixrss);
jbe@0	1049 moonbr_try_destroy_worker_stat("integral unshared data", ru_idrss);
jbe@0	1050 moonbr_try_destroy_worker_stat("integral unshared stack", ru_isrss);
jbe@0	1051 moonbr_try_destroy_worker_stat("page replaims", ru_minflt);
jbe@0	1052 moonbr_try_destroy_worker_stat("page faults", ru_majflt);
jbe@0	1053 moonbr_try_destroy_worker_stat("swaps", ru_nswap);
jbe@0	1054 moonbr_try_destroy_worker_stat("block input operations", ru_inblock);
jbe@0	1055 moonbr_try_destroy_worker_stat("block output operations", ru_oublock);
jbe@0	1056 moonbr_try_destroy_worker_stat("messages sent", ru_msgsnd);
jbe@0	1057 moonbr_try_destroy_worker_stat("messages received", ru_msgrcv);
jbe@0	1058 moonbr_try_destroy_worker_stat("signals received", ru_nsignals);
jbe@0	1059 moonbr_try_destroy_worker_stat("voluntary context switches", ru_nvcsw);
jbe@0	1060 moonbr_try_destroy_worker_stat("involuntary context switches", ru_nivcsw);
jbe@0	1061 }
jbe@0	1062 }
jbe@0	1063 {
jbe@0	1064 int retval = (
jbe@0	1065 (worker->idle \|\| worker->assigned) ?
jbe@0	1066 MOONBR_DESTROY_IDLE_OR_ASSIGNED :
jbe@0	1067 MOONBR_DESTROY_PREPARE
jbe@0	1068 );
jbe@0	1069 if (worker->prev_worker) worker->prev_worker->next_worker = worker->next_worker;
jbe@0	1070 else worker->pool->first_worker = worker->next_worker;
jbe@0	1071 if (worker->next_worker) worker->next_worker->prev_worker = worker->prev_worker;
jbe@0	1072 else worker->pool->last_worker = worker->prev_worker;
jbe@0	1073 if (worker->idle) {
jbe@0	1074 if (worker->prev_idle_worker) worker->prev_idle_worker->next_idle_worker = worker->next_idle_worker;
jbe@0	1075 else worker->pool->first_idle_worker = worker->next_idle_worker;
jbe@0	1076 if (worker->next_idle_worker) worker->next_idle_worker->prev_idle_worker = worker->prev_idle_worker;
jbe@0	1077 else worker->pool->last_idle_worker = worker->prev_idle_worker;
jbe@0	1078 worker->pool->idle_worker_count--;
jbe@0	1079 }
jbe@0	1080 if (!worker->assigned) worker->pool->unassigned_worker_count--;
jbe@0	1081 worker->pool->total_worker_count--;
jbe@0	1082 worker->pool->worker_count_stat = 1;
jbe@0	1083 if (worker->errorlinebuf) free(worker->errorlinebuf);
jbe@0	1084 free(worker);
jbe@0	1085 return retval;
jbe@0	1086 }
jbe@0	1087 }
jbe@0	1088
jbe@0	1089 /* Marks a worker as idle and stores it in a queue, optionally setting 'idle_expiration' value */
jbe@0	1090 static void moonbr_add_idle_worker(struct moonbr_worker *worker) {
jbe@0	1091 worker->prev_idle_worker = worker->pool->last_idle_worker;
jbe@0	1092 if (worker->prev_idle_worker) worker->prev_idle_worker->next_idle_worker = worker;
jbe@0	1093 else worker->pool->first_idle_worker = worker;
jbe@0	1094 worker->pool->last_idle_worker = worker;
jbe@0	1095 worker->idle = 1;
jbe@0	1096 worker->pool->idle_worker_count++;
jbe@0	1097 if (worker->assigned) {
jbe@0	1098 worker->assigned = 0;
jbe@0	1099 worker->pool->unassigned_worker_count++;
jbe@0	1100 }
jbe@0	1101 worker->pool->worker_count_stat = 1;
jbe@0	1102 if (timerisset(&worker->pool->idle_timeout)) {
jbe@0	1103 struct timeval now;
jbe@0	1104 moonbr_now(&now);
jbe@0	1105 timeradd(&now, &worker->pool->idle_timeout, &worker->idle_expiration);
jbe@0	1106 }
jbe@0	1107 }
jbe@0	1108
jbe@0	1109 /* Pops a worker from the queue of idle workers (idle queue must not be empty) */
jbe@0	1110 static struct moonbr_worker moonbr_pop_idle_worker(struct moonbr_pool pool) {
jbe@0	1111 struct moonbr_worker *worker;
jbe@0	1112 worker = pool->first_idle_worker;
jbe@0	1113 pool->first_idle_worker = worker->next_idle_worker;
jbe@0	1114 if (pool->first_idle_worker) pool->first_idle_worker->prev_idle_worker = NULL;
jbe@0	1115 else pool->last_idle_worker = NULL;
jbe@0	1116 worker->next_idle_worker = NULL;
jbe@0	1117 worker->idle = 0;
jbe@0	1118 worker->pool->idle_worker_count--;
jbe@0	1119 worker->assigned = 1;
jbe@0	1120 worker->pool->unassigned_worker_count--;
jbe@0	1121 worker->pool->worker_count_stat = 1;
jbe@0	1122 return worker;
jbe@0	1123 }
jbe@0	1124
jbe@0	1125
jbe@0	1126 /* Functions for queues of 'struct moonbr_listener' */
jbe@0	1127
jbe@0	1128 /* Appends a 'struct moonbr_listener' to the queue of idle listeners and registers it for poll() */
jbe@0	1129 static void moonbr_add_idle_listener(struct moonbr_listener *listener) {
jbe@0	1130 listener->prev_listener = listener->pool->last_idle_listener;
jbe@0	1131 if (listener->prev_listener) listener->prev_listener->next_listener = listener;
jbe@0	1132 else listener->pool->first_idle_listener = listener;
jbe@0	1133 listener->pool->last_idle_listener = listener;
jbe@0	1134 if (listener->pollidx != -1) moonbr_poll_fds[listener->pollidx].events \|= POLLIN;
jbe@0	1135 }
jbe@0	1136
jbe@0	1137 /* Removes a 'struct moonbr_listener' from the queue of idle listeners and unregisters it from poll() */
jbe@0	1138 static void moonbr_remove_idle_listener(struct moonbr_listener *listener) {
jbe@0	1139 if (listener->prev_listener) listener->prev_listener->next_listener = listener->next_listener;
jbe@0	1140 else listener->pool->first_idle_listener = listener->next_listener;
jbe@0	1141 if (listener->next_listener) listener->next_listener->prev_listener = listener->prev_listener;
jbe@0	1142 else listener->pool->last_idle_listener = listener->prev_listener;
jbe@0	1143 listener->prev_listener = NULL;
jbe@0	1144 listener->next_listener = NULL;
jbe@0	1145 if (listener->pollidx != -1) moonbr_poll_fds[listener->pollidx].events &= ~POLLIN;
jbe@0	1146 }
jbe@0	1147
jbe@0	1148 /* Adds a listener to the queue of connected listeners (i.e. waiting to have their incoming connection accepted) */
jbe@0	1149 static void moonbr_add_connected_listener(struct moonbr_listener *listener) {
jbe@0	1150 listener->prev_listener = listener->pool->last_connected_listener;
jbe@0	1151 if (listener->prev_listener) listener->prev_listener->next_listener = listener;
jbe@0	1152 else listener->pool->first_connected_listener = listener;
jbe@0	1153 listener->pool->last_connected_listener = listener;
jbe@0	1154 }
jbe@0	1155
jbe@0	1156 /* Removes and returns the first connected listener in the queue */
jbe@0	1157 static struct moonbr_listener moonbr_pop_connected_listener(struct moonbr_pool pool) {
jbe@0	1158 struct moonbr_listener *listener = pool->first_connected_listener;
jbe@0	1159 listener->pool->first_connected_listener = listener->next_listener;
jbe@0	1160 if (listener->pool->first_connected_listener) listener->pool->first_connected_listener->prev_listener = NULL;
jbe@0	1161 else listener->pool->last_connected_listener = NULL;
jbe@0	1162 listener->next_listener = NULL;
jbe@0	1163 return listener;
jbe@0	1164 }
jbe@0	1165
jbe@0	1166
jbe@0	1167 /* Functions to handle polling */
jbe@0	1168
jbe@0	1169 /* Returns an index to a new initialized entry in moonbr_poll_fds[] */
jbe@0	1170 int moonbr_poll_fds_nextindex() {
jbe@0	1171 if (moonbr_poll_fds_count >= moonbr_poll_fds_bufsize) {
jbe@0	1172 if (moonbr_poll_fds_bufsize) moonbr_poll_fds_bufsize *= 2;
jbe@0	1173 else moonbr_poll_fds_bufsize = 1;
jbe@0	1174 moonbr_poll_fds = realloc(
jbe@0	1175 moonbr_poll_fds, moonbr_poll_fds_bufsize * sizeof(struct pollfd)
jbe@0	1176 );
jbe@0	1177 if (!moonbr_poll_fds) {
jbe@0	1178 moonbr_log(LOG_CRIT, "Memory allocation error");
jbe@0	1179 moonbr_terminate_error();
jbe@0	1180 }
jbe@0	1181 }
jbe@0	1182 moonbr_poll_fds[moonbr_poll_fds_count] = (struct pollfd){0, };
jbe@0	1183 return moonbr_poll_fds_count++;
jbe@0	1184 }
jbe@0	1185
jbe@0	1186 /* Returns an index to a new initialized entry in moonbr_poll_workers[] */
jbe@0	1187 int moonbr_poll_workers_nextindex() {
jbe@0	1188 if (moonbr_poll_worker_count >= moonbr_poll_workers_bufsize) {
jbe@0	1189 if (moonbr_poll_workers_bufsize) moonbr_poll_workers_bufsize *= 2;
jbe@0	1190 else moonbr_poll_workers_bufsize = 1;
jbe@0	1191 moonbr_poll_workers = realloc(
jbe@0	1192 moonbr_poll_workers, moonbr_poll_workers_bufsize * sizeof(struct moonbr_poll_worker)
jbe@0	1193 );
jbe@0	1194 if (!moonbr_poll_workers) {
jbe@0	1195 moonbr_log(LOG_CRIT, "Memory allocation error");
jbe@0	1196 moonbr_terminate_error();
jbe@0	1197 }
jbe@0	1198 }
jbe@0	1199 moonbr_poll_workers[moonbr_poll_worker_count] = (struct moonbr_poll_worker){0, };
jbe@0	1200 return moonbr_poll_worker_count++;
jbe@0	1201 }
jbe@0	1202
jbe@0	1203 /* Queues all listeners as idle, and initializes static part of moonbr_poll_fds[], which is passed to poll() */
jbe@0	1204 static void moonbr_poll_init() {
jbe@0	1205 if (socketpair(
jbe@0	1206 PF_LOCAL,
jbe@0	1207 SOCK_STREAM \| SOCK_CLOEXEC \| SOCK_NONBLOCK,
jbe@0	1208 0,
jbe@0	1209 moonbr_poll_signalfds
jbe@0	1210 )) {
jbe@0	1211 moonbr_log(LOG_CRIT, "Could not create socket pair for signal delivery during polling: %s", strerror(errno));
jbe@0	1212 moonbr_terminate_error();
jbe@0	1213 }
jbe@0	1214 {
jbe@0	1215 int j = moonbr_poll_fds_nextindex();
jbe@0	1216 struct pollfd *pollfd = &moonbr_poll_fds[j];
jbe@0	1217 pollfd->fd = moonbr_poll_signalfd_read;
jbe@0	1218 pollfd->events = POLLIN;
jbe@0	1219 }
jbe@0	1220 {
jbe@0	1221 struct moonbr_pool *pool;
jbe@0	1222 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
jbe@0	1223 int i;
jbe@0	1224 for (i=0; i<pool->listener_count; i++) {
jbe@0	1225 struct moonbr_listener *listener = &pool->listener[i];
jbe@0	1226 if (listener->listenfd != -1) {
jbe@0	1227 int j = moonbr_poll_fds_nextindex();
jbe@0	1228 listener->pollidx = j;
jbe@0	1229 moonbr_poll_fds[j].fd = listener->listenfd;
jbe@0	1230 }
jbe@0	1231 moonbr_add_idle_listener(listener);
jbe@0	1232 }
jbe@0	1233 }
jbe@0	1234 }
jbe@0	1235 moonbr_poll_fds_static_count = moonbr_poll_fds_count; /* remember size of static part of array */
jbe@0	1236 }
jbe@0	1237
jbe@0	1238 /* Disables polling of all listeners (required for clean shutdown) */
jbe@0	1239 static void moonbr_poll_shutdown() {
jbe@0	1240 int i;
jbe@0	1241 for (i=1; i<moonbr_poll_fds_static_count; i++) {
jbe@0	1242 moonbr_poll_fds[i].fd = -1;
jbe@0	1243 }
jbe@0	1244 }
jbe@0	1245
jbe@0	1246 /* (Re)builds dynamic part of moonbr_poll_fds[] array, and (re)builds moonbr_poll_workers[] array */
jbe@0	1247 static void moonbr_poll_refresh() {
jbe@0	1248 moonbr_poll_refresh_needed = 0;
jbe@0	1249 moonbr_poll_fds_count = moonbr_poll_fds_static_count;
jbe@0	1250 moonbr_poll_worker_count = 0;
jbe@0	1251 {
jbe@0	1252 struct moonbr_pool *pool;
jbe@0	1253 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
jbe@0	1254 struct moonbr_worker *worker;
jbe@0	1255 for (worker=pool->first_worker; worker; worker=worker->next_worker) {
jbe@0	1256 if (worker->controlfd != -1) {
jbe@0	1257 int j = moonbr_poll_fds_nextindex();
jbe@0	1258 int k = moonbr_poll_workers_nextindex();
jbe@0	1259 struct pollfd *pollfd = &moonbr_poll_fds[j];
jbe@0	1260 struct moonbr_poll_worker *poll_worker = &moonbr_poll_workers[k];
jbe@0	1261 pollfd->fd = worker->controlfd;
jbe@0	1262 pollfd->events = POLLIN;
jbe@0	1263 poll_worker->channel = MOONBR_POLL_WORKER_CONTROLCHANNEL;
jbe@0	1264 poll_worker->worker = worker;
jbe@0	1265 }
jbe@0	1266 if (worker->errorfd != -1) {
jbe@0	1267 int j = moonbr_poll_fds_nextindex();
jbe@0	1268 int k = moonbr_poll_workers_nextindex();
jbe@0	1269 struct pollfd *pollfd = &moonbr_poll_fds[j];
jbe@0	1270 struct moonbr_poll_worker *poll_worker = &moonbr_poll_workers[k];
jbe@0	1271 pollfd->fd = worker->errorfd;
jbe@0	1272 pollfd->events = POLLIN;
jbe@0	1273 poll_worker->channel = MOONBR_POLL_WORKER_ERRORCHANNEL;
jbe@0	1274 poll_worker->worker = worker;
jbe@0	1275 }
jbe@0	1276 }
jbe@0	1277 }
jbe@0	1278 }
jbe@0	1279 }
jbe@0	1280
jbe@0	1281 /* resets socket and 'revents' field of moonbr_poll_fds[] for signal delivery just before poll() is called */
jbe@0	1282 static void moonbr_poll_reset_signal() {
jbe@0	1283 ssize_t readcount;
jbe@0	1284 char buf[1];
jbe@0	1285 moonbr_poll_fds[0].revents = 0;
jbe@0	1286 while ((readcount = read(moonbr_poll_signalfd_read, buf, 1)) < 0) {
jbe@0	1287 if (errno == EAGAIN) break;
jbe@0	1288 if (errno != EINTR) {
jbe@0	1289 moonbr_log(LOG_CRIT, "Error while reading from signal delivery socket: %s", strerror(errno));
jbe@0	1290 moonbr_terminate_error();
jbe@0	1291 }
jbe@0	1292 }
jbe@0	1293 if (!readcount) {
jbe@0	1294 moonbr_log(LOG_CRIT, "Unexpected EOF when reading from signal delivery socket: %s", strerror(errno));
jbe@0	1295 moonbr_terminate_error();
jbe@0	1296 }
jbe@0	1297 }
jbe@0	1298
jbe@0	1299
jbe@0	1300 /* Shutdown initiation */
jbe@0	1301
jbe@0	1302 /* Sets global variable 'moonbr_shutdown_in_progress', closes listeners, and demands worker termination */
jbe@0	1303 static void moonbr_initiate_shutdown() {
jbe@0	1304 struct moonbr_pool *pool;
jbe@0	1305 int i;
jbe@0	1306 if (moonbr_shutdown_in_progress) {
jbe@0	1307 moonbr_log(LOG_NOTICE, "Shutdown already in progress");
jbe@0	1308 return;
jbe@0	1309 }
jbe@0	1310 moonbr_shutdown_in_progress = 1;
jbe@0	1311 moonbr_log(LOG_NOTICE, "Initiate shutdown");
jbe@0	1312 for (pool = moonbr_first_pool; pool; pool = pool->next_pool) {
jbe@0	1313 for (i=0; i<pool->listener_count; i++) {
jbe@0	1314 struct moonbr_listener *listener = &pool->listener[i];
jbe@0	1315 if (listener->listenfd != -1) {
jbe@0	1316 if (close(listener->listenfd) && errno != EINTR) {
jbe@0	1317 moonbr_log(LOG_CRIT, "Could not close listening socket: %s", strerror(errno));
jbe@0	1318 moonbr_terminate_error();
jbe@0	1319 }
jbe@0	1320 }
jbe@0	1321 }
jbe@0	1322 pool->pre_fork = 0;
jbe@0	1323 pool->min_fork = 0;
jbe@0	1324 pool->max_fork = 0;
jbe@0	1325 timerclear(&pool->exit_delay);
jbe@0	1326 }
jbe@0	1327 moonbr_poll_shutdown(); /* avoids loops due to error condition when polling closed listeners */
jbe@0	1328 }
jbe@0	1329
jbe@0	1330
jbe@0	1331 /* Functions to communicate with child processes */
jbe@0	1332
jbe@0	1333 /* Tells child process to terminate */
jbe@0	1334 static void moonbr_terminate_idle_worker(struct moonbr_worker *worker) {
jbe@0	1335 moonbr_send_control_message(worker, MOONBR_COMMAND_TERMINATE, -1, NULL);
jbe@0	1336 }
jbe@0	1337
jbe@0	1338 /* Handles status messages from child process */
jbe@0	1339 static void moonbr_read_controlchannel(struct moonbr_worker *worker) {
jbe@0	1340 char controlmsg;
jbe@0	1341 {
jbe@0	1342 ssize_t bytes_read;
jbe@0	1343 while ((bytes_read = read(worker->controlfd, &controlmsg, 1)) <= 0) {
jbe@0	1344 if (bytes_read == 0 \|\| errno == ECONNRESET) {
jbe@0	1345 moonbr_log(LOG_WARNING, "Child process in pool #%i with PID %i unexpectedly closed control socket", worker->pool->poolnum, (int)worker->pid);
jbe@0	1346 if (close(worker->controlfd) && errno != EINTR) {
jbe@0	1347 moonbr_log(LOG_CRIT, "Error while closing control socket to child process in pool #%i with PID %i: %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
jbe@0	1348 moonbr_terminate_error();
jbe@0	1349 }
jbe@0	1350 worker->controlfd = -1;
jbe@0	1351 moonbr_poll_refresh_needed = 1;
jbe@0	1352 return;
jbe@0	1353 }
jbe@0	1354 if (errno != EINTR) {
jbe@0	1355 moonbr_log(LOG_CRIT, "Unexpected error while reading control socket from child process in pool #%i with PID %i: %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
jbe@0	1356 moonbr_terminate_error();
jbe@0	1357 }
jbe@0	1358 }
jbe@0	1359 }
jbe@0	1360 if (worker->idle) {
jbe@0	1361 moonbr_log(LOG_CRIT, "Unexpected data from supposedly idle child process in pool #%i with PID %i", worker->pool->poolnum, (int)worker->pid);
jbe@0	1362 moonbr_terminate_error();
jbe@0	1363 }
jbe@0	1364 if (moonbr_debug) {
jbe@0	1365 moonbr_log(LOG_DEBUG, "Received control message from child in pool #%i with PID %i: \"%c\"", worker->pool->poolnum, (int)worker->pid, (int)controlmsg);
jbe@0	1366 }
jbe@0	1367 switch (controlmsg) {
jbe@0	1368 case MOONBR_STATUS_IDLE:
jbe@0	1369 if (moonbr_stat) {
jbe@0	1370 moonbr_log(LOG_INFO, "Child process in pool #%i with PID %i reports as idle", worker->pool->poolnum, (int)worker->pid);
jbe@0	1371 }
jbe@0	1372 moonbr_add_idle_worker(worker);
jbe@0	1373 break;
jbe@0	1374 case MOONBR_STATUS_GOODBYE:
jbe@0	1375 if (moonbr_stat) {
jbe@0	1376 moonbr_log(LOG_INFO, "Child process in pool #%i with PID %i announced termination", worker->pool->poolnum, (int)worker->pid);
jbe@0	1377 }
jbe@0	1378 if (close(worker->controlfd) && errno != EINTR) {
jbe@0	1379 moonbr_log(LOG_CRIT, "Error while closing control socket to child process in pool #%i with PID %i: %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
jbe@0	1380 moonbr_terminate_error();
jbe@0	1381 }
jbe@0	1382 worker->controlfd = -1;
jbe@0	1383 moonbr_poll_refresh_needed = 1;
jbe@0	1384 break;
jbe@0	1385 default:
jbe@0	1386 moonbr_log(LOG_CRIT, "Received illegal data (\"%c\") while reading control socket from child process in pool #%i with PID %i", (int)controlmsg, worker->pool->poolnum, (int)worker->pid);
jbe@0	1387 moonbr_terminate_error();
jbe@0	1388 }
jbe@0	1389 }
jbe@0	1390
jbe@0	1391 /* Handles stderr stream from child process */
jbe@0	1392 static void moonbr_read_errorchannel(struct moonbr_worker *worker) {
jbe@0	1393 char staticbuf[MOONBR_MAXERRORLINELEN+1];
jbe@0	1394 char *buf = worker->errorlinebuf;
jbe@0	1395 if (!buf) buf = staticbuf;
jbe@0	1396 {
jbe@0	1397 ssize_t bytes_read;
jbe@0	1398 while (
jbe@0	1399 (bytes_read = read(
jbe@0	1400 worker->errorfd,
jbe@0	1401 buf + worker->errorlinelen,
jbe@0	1402 MOONBR_MAXERRORLINELEN+1 - worker->errorlinelen
jbe@0	1403 )) <= 0
jbe@0	1404 ) {
jbe@0	1405 if (bytes_read == 0 \|\| errno == ECONNRESET) {
jbe@0	1406 if (moonbr_debug) {
jbe@0	1407 moonbr_log(LOG_DEBUG, "Child process in pool #%i with PID %i closed stderr socket", worker->pool->poolnum, (int)worker->pid);
jbe@0	1408 }
jbe@0	1409 if (close(worker->errorfd) && errno != EINTR) {
jbe@0	1410 moonbr_log(LOG_CRIT, "Error while closing stderr socket to child process in pool #%i with PID %i: %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
jbe@0	1411 moonbr_terminate_error();
jbe@0	1412 }
jbe@0	1413 worker->errorfd = -1;
jbe@0	1414 moonbr_poll_refresh_needed = 1;
jbe@0	1415 break;
jbe@0	1416 }
jbe@0	1417 if (errno != EINTR) {
jbe@0	1418 moonbr_log(LOG_CRIT, "Unexpected error while reading stderr from child process in pool #%i with PID %i: %s", worker->pool->poolnum, (int)worker->pid, strerror(errno));
jbe@0	1419 moonbr_terminate_error();
jbe@0	1420 }
jbe@0	1421 }
jbe@0	1422 worker->errorlinelen += bytes_read;
jbe@0	1423 }
jbe@0	1424 {
jbe@0	1425 int i;
jbe@0	1426 for (i=0; i<worker->errorlinelen; i++) {
jbe@0	1427 if (buf[i] == '\n') buf[i] = 0;
jbe@0	1428 if (!buf[i]) {
jbe@0	1429 if (worker->errorlineovf) {
jbe@0	1430 worker->errorlineovf = 0;
jbe@0	1431 } else {
jbe@0	1432 moonbr_log(LOG_WARNING, "Error log from process in pool #%i with PID %i: %s", worker->pool->poolnum, (int)worker->pid, buf);
jbe@0	1433 }
jbe@0	1434 worker->errorlinelen -= i+1;
jbe@0	1435 memmove(buf, buf+i+1, worker->errorlinelen);
jbe@0	1436 i = -1;
jbe@0	1437 }
jbe@0	1438 }
jbe@0	1439 if (i > MOONBR_MAXERRORLINELEN) {
jbe@0	1440 buf[MOONBR_MAXERRORLINELEN] = 0;
jbe@0	1441 if (!worker->errorlineovf) {
jbe@0	1442 moonbr_log(LOG_WARNING, "Error log from process in pool #%i with PID %i (line has been truncated): %s", worker->pool->poolnum, (int)worker->pid, buf);
jbe@0	1443 }
jbe@0	1444 worker->errorlinelen = 0;
jbe@0	1445 worker->errorlineovf = 1;
jbe@0	1446 }
jbe@0	1447 }
jbe@0	1448 if (!worker->errorlinebuf && worker->errorlinelen) { /* allocate buffer on heap only if necessary */
jbe@0	1449 worker->errorlinebuf = malloc((MOONBR_MAXERRORLINELEN+1) * sizeof(char));
jbe@0	1450 if (!worker->errorlinebuf) {
jbe@0	1451 moonbr_log(LOG_CRIT, "Memory allocation error");
jbe@0	1452 moonbr_terminate_error();
jbe@0	1453 }
jbe@0	1454 memcpy(worker->errorlinebuf, staticbuf, worker->errorlinelen);
jbe@0	1455 }
jbe@0	1456 }
jbe@0	1457
jbe@0	1458
jbe@0	1459 /* Handler for incoming connections */
jbe@0	1460
jbe@0	1461 /* Accepts one or more incoming connections on listener socket and passes it to worker(s) popped from idle queue */
jbe@0	1462 static void moonbr_connect(struct moonbr_pool *pool) {
jbe@0	1463 struct moonbr_listener *listener = moonbr_pop_connected_listener(pool);
jbe@0	1464 struct moonbr_worker *worker;
jbe@0	1465 switch (listener->proto) {
jbe@0	1466 case MOONBR_PROTO_INTERVAL:
jbe@0	1467 worker = moonbr_pop_idle_worker(pool);
jbe@0	1468 if (moonbr_stat) {
jbe@0	1469 moonbr_log(LOG_INFO, "Dispatching interval timer \"%s\" of pool #%i to PID %i", listener->proto_specific.interval.name, listener->pool->poolnum, (int)worker->pid);
jbe@0	1470 }
jbe@0	1471 worker->restart_interval_listener = listener;
jbe@124	1472 moonbr_send_control_message(worker, MOONBR_COMMAND_CONNECT, -1, listener);
jbe@0	1473 /* do not push listener to queue of idle listeners yet */
jbe@0	1474 break;
jbe@0	1475 case MOONBR_PROTO_LOCAL:
jbe@0	1476 do {
jbe@0	1477 int peerfd;
jbe@0	1478 struct sockaddr_un peeraddr;
jbe@0	1479 socklen_t peeraddr_len = sizeof(struct sockaddr_un);
jbe@0	1480 peerfd = accept4(
jbe@0	1481 listener->listenfd,
jbe@0	1482 (struct sockaddr *)&peeraddr,
jbe@0	1483 &peeraddr_len,
jbe@0	1484 SOCK_CLOEXEC
jbe@0	1485 );
jbe@0	1486 if (peerfd == -1) {
jbe@0	1487 if (errno == EWOULDBLOCK) {
jbe@0	1488 break;
jbe@0	1489 } else if (errno == ECONNABORTED) {
jbe@0	1490 moonbr_log(LOG_WARNING, "Connection aborted before accepting it (proto=\"local\", path=\"%s\")", listener->proto_specific.local.path);
jbe@0	1491 break;
jbe@0	1492 } else if (errno != EINTR) {
jbe@0	1493 moonbr_log(LOG_ERR, "Could not accept socket connection: %s", strerror(errno));
jbe@0	1494 moonbr_terminate_error();
jbe@0	1495 }
jbe@0	1496 } else {
jbe@0	1497 worker = moonbr_pop_idle_worker(pool);
jbe@0	1498 if (moonbr_stat) {
jbe@0	1499 moonbr_log(LOG_INFO, "Dispatching local socket connection on path \"%s\" for pool #%i to PID %i", listener->proto_specific.local.path, listener->pool->poolnum, (int)worker->pid);
jbe@0	1500 }
jbe@124	1501 moonbr_send_control_message(worker, MOONBR_COMMAND_CONNECT, peerfd, listener);
jbe@0	1502 if (close(peerfd) && errno != EINTR) {
jbe@0	1503 moonbr_log(LOG_ERR, "Could not close incoming socket connection in parent process: %s", strerror(errno));
jbe@0	1504 moonbr_terminate_error();
jbe@0	1505 }
jbe@0	1506 }
jbe@0	1507 } while (pool->first_idle_worker);
jbe@0	1508 moonbr_add_idle_listener(listener);
jbe@0	1509 break;
jbe@0	1510 case MOONBR_PROTO_TCP6:
jbe@0	1511 do {
jbe@0	1512 int peerfd;
jbe@0	1513 struct sockaddr_in6 peeraddr;
jbe@0	1514 socklen_t peeraddr_len = sizeof(struct sockaddr_in6);
jbe@0	1515 peerfd = accept4(
jbe@0	1516 listener->listenfd,
jbe@0	1517 (struct sockaddr *)&peeraddr,
jbe@0	1518 &peeraddr_len,
jbe@0	1519 SOCK_CLOEXEC
jbe@0	1520 );
jbe@0	1521 if (peerfd == -1) {
jbe@0	1522 if (errno == EWOULDBLOCK) {
jbe@0	1523 break;
jbe@0	1524 } else if (errno == ECONNABORTED) {
jbe@0	1525 moonbr_log(LOG_WARNING, "Connection aborted before accepting it (proto=\"tcp6\", port=%i)", listener->proto_specific.tcp.port);
jbe@0	1526 break;
jbe@0	1527 } else if (errno != EINTR) {
jbe@0	1528 moonbr_log(LOG_ERR, "Could not accept socket connection: %s", strerror(errno));
jbe@0	1529 moonbr_terminate_error();
jbe@0	1530 }
jbe@0	1531 } else {
jbe@0	1532 worker = moonbr_pop_idle_worker(pool);
jbe@0	1533 if (moonbr_stat) {
jbe@0	1534 moonbr_log(LOG_INFO, "Dispatching TCP/IPv6 connection for pool #%i on port %i to PID %i", listener->pool->poolnum, listener->proto_specific.tcp.port, (int)worker->pid);
jbe@0	1535 }
jbe@124	1536 moonbr_send_control_message(worker, MOONBR_COMMAND_CONNECT, peerfd, listener);
jbe@0	1537 if (close(peerfd) && errno != EINTR) {
jbe@0	1538 moonbr_log(LOG_ERR, "Could not close incoming socket connection in parent process: %s", strerror(errno));
jbe@0	1539 moonbr_terminate_error();
jbe@0	1540 }
jbe@0	1541 }
jbe@0	1542 } while (pool->first_idle_worker);
jbe@0	1543 moonbr_add_idle_listener(listener);
jbe@0	1544 break;
jbe@0	1545 case MOONBR_PROTO_TCP4:
jbe@0	1546 do {
jbe@0	1547 int peerfd;
jbe@0	1548 struct sockaddr_in peeraddr;
jbe@0	1549 socklen_t peeraddr_len = sizeof(struct sockaddr_in);
jbe@0	1550 peerfd = accept4(
jbe@0	1551 listener->listenfd,
jbe@0	1552 (struct sockaddr *)&peeraddr,
jbe@0	1553 &peeraddr_len,
jbe@0	1554 SOCK_CLOEXEC
jbe@0	1555 );
jbe@0	1556 if (peerfd == -1) {
jbe@0	1557 if (errno == EWOULDBLOCK) {
jbe@0	1558 break;
jbe@0	1559 } else if (errno == ECONNABORTED) {
jbe@0	1560 moonbr_log(LOG_WARNING, "Connection aborted before accepting it (proto=\"tcp4\", port=%i)", listener->proto_specific.tcp.port);
jbe@0	1561 break;
jbe@0	1562 } else if (errno != EINTR) {
jbe@0	1563 moonbr_log(LOG_ERR, "Could not accept socket connection: %s", strerror(errno));
jbe@0	1564 moonbr_terminate_error();
jbe@0	1565 }
jbe@0	1566 } else {
jbe@0	1567 worker = moonbr_pop_idle_worker(pool);
jbe@0	1568 if (moonbr_stat) {
jbe@0	1569 moonbr_log(LOG_INFO, "Dispatching TCP/IPv4 connection for pool #%i on port %i to PID %i", listener->pool->poolnum, listener->proto_specific.tcp.port, (int)worker->pid);
jbe@0	1570 }
jbe@124	1571 moonbr_send_control_message(worker, MOONBR_COMMAND_CONNECT, peerfd, listener);
jbe@0	1572 if (close(peerfd) && errno != EINTR) {
jbe@0	1573 moonbr_log(LOG_ERR, "Could not close incoming socket connection in parent process: %s", strerror(errno));
jbe@0	1574 moonbr_terminate_error();
jbe@0	1575 }
jbe@0	1576 }
jbe@0	1577 } while (pool->first_idle_worker);
jbe@0	1578 moonbr_add_idle_listener(listener);
jbe@0	1579 break;
jbe@0	1580 default:
jbe@0	1581 moonbr_log(LOG_ERR, "Internal error (should not happen): Unexpected value in listener.proto field");
jbe@0	1582 moonbr_terminate_error();
jbe@0	1583 }
jbe@0	1584 }
jbe@0	1585
jbe@0	1586
jbe@0	1587 /* Functions to initialize and restart interval timers */
jbe@0	1588
jbe@0	1589 /* Initializes all interval timers */
jbe@0	1590 static void moonbr_interval_initialize() {
jbe@0	1591 struct timeval now;
jbe@0	1592 struct moonbr_pool *pool;
jbe@0	1593 moonbr_now(&now);
jbe@0	1594 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
jbe@0	1595 int i;
jbe@0	1596 for (i=0; i<pool->listener_count; i++) {
jbe@0	1597 struct moonbr_listener *listener = &pool->listener[i];
jbe@0	1598 if (listener->proto == MOONBR_PROTO_INTERVAL) {
jbe@0	1599 timeradd(
jbe@0	1600 &now,
jbe@0	1601 &listener->proto_specific.interval.delay,
jbe@0	1602 &listener->proto_specific.interval.wakeup
jbe@0	1603 );
jbe@0	1604 }
jbe@0	1605 }
jbe@0	1606 }
jbe@0	1607 }
jbe@0	1608
jbe@0	1609 /* If necessary, restarts interval timers and queues interval listener as idle after a worker changed status */
jbe@0	1610 static void moonbr_interval_restart(
jbe@0	1611 struct moonbr_worker *worker,
jbe@0	1612 struct timeval now / passed to synchronize with moonbr_run() function */
jbe@0	1613 ) {
jbe@0	1614 struct moonbr_listener *listener = worker->restart_interval_listener;
jbe@0	1615 if (listener) {
jbe@0	1616 moonbr_add_idle_listener(listener);
jbe@0	1617 worker->restart_interval_listener = NULL;
jbe@0	1618 if (listener->proto_specific.interval.strict) {
jbe@0	1619 timeradd(
jbe@0	1620 &listener->proto_specific.interval.wakeup,
jbe@0	1621 &listener->proto_specific.interval.delay,
jbe@0	1622 &listener->proto_specific.interval.wakeup
jbe@0	1623 );
jbe@0	1624 if (timercmp(&listener->proto_specific.interval.wakeup, now, <)) {
jbe@0	1625 listener->proto_specific.interval.wakeup = *now;
jbe@0	1626 }
jbe@0	1627 } else {
jbe@0	1628 timeradd(
jbe@0	1629 now,
jbe@0	1630 &listener->proto_specific.interval.delay,
jbe@0	1631 &listener->proto_specific.interval.wakeup
jbe@0	1632 );
jbe@0	1633 }
jbe@0	1634 }
jbe@0	1635 }
jbe@0	1636
jbe@0	1637
jbe@0	1638 /* Main loop and helper functions */
jbe@0	1639
jbe@0	1640 /* Stores the earliest required wakeup time in 'wait' variable */
jbe@0	1641 static void moonbr_calc_wait(struct timeval wait, struct timeval wakeup) {
jbe@0	1642 if (!timerisset(wait) \|\| timercmp(wakeup, wait, <)) wait = wakeup;
jbe@0	1643 }
jbe@0	1644
jbe@0	1645 /* Main loop of Moonbridge system (including initialization of signal handlers and polling structures) */
jbe@0	1646 static void moonbr_run(lua_State *L) {
jbe@0	1647 struct timeval now;
jbe@0	1648 struct moonbr_pool *pool;
jbe@0	1649 struct moonbr_worker *worker;
jbe@0	1650 struct moonbr_worker next_worker; / needed when worker is removed during iteration of workers */
jbe@0	1651 struct moonbr_listener *listener;
jbe@0	1652 struct moonbr_listener next_listener; / needed when listener is removed during iteration of listeners */
jbe@0	1653 int i;
jbe@0	1654 moonbr_poll_init(); /* must be executed before moonbr_signal_init() */
jbe@0	1655 moonbr_signal_init();
jbe@0	1656 moonbr_interval_initialize();
jbe@0	1657 moonbr_pstate = MOONBR_PSTATE_RUNNING;
jbe@0	1658 while (1) {
jbe@0	1659 struct timeval wait = {0, }; /* point in time when premature wakeup of poll() is required */
jbe@0	1660 if (moonbr_cond_interrupt) {
jbe@0	1661 moonbr_log(LOG_WARNING, "Fast shutdown requested");
jbe@0	1662 moonbr_terminate(MOONBR_EXITCODE_GRACEFUL);
jbe@0	1663 }
jbe@0	1664 if (moonbr_cond_terminate) {
jbe@0	1665 moonbr_initiate_shutdown();
jbe@0	1666 moonbr_cond_terminate = 0;
jbe@0	1667 }
jbe@0	1668 moonbr_cond_child = 0; /* must not be reset between moonbr_try_destroy_worker() and poll() */
jbe@0	1669 moonbr_now(&now);
jbe@0	1670 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
jbe@0	1671 int terminated_worker_count = 0; /* allows shortcut for new worker creation */
jbe@0	1672 /* terminate idle workers when expired */
jbe@0	1673 if (timerisset(&pool->idle_timeout)) {
jbe@0	1674 while ((worker = pool->first_idle_worker) != NULL) {
jbe@0	1675 if (timercmp(&worker->idle_expiration, &now, >)) break;
jbe@0	1676 moonbr_pop_idle_worker(pool);
jbe@0	1677 moonbr_terminate_idle_worker(worker);
jbe@0	1678 }
jbe@0	1679 }
jbe@0	1680 /* mark listeners as connected when incoming connection is pending */
jbe@0	1681 for (listener=pool->first_idle_listener; listener; listener=next_listener) {
jbe@0	1682 next_listener = listener->next_listener; /* extra variable necessary due to changing list */
jbe@0	1683 if (listener->pollidx != -1) {
jbe@0	1684 if (moonbr_poll_fds[listener->pollidx].revents) {
jbe@0	1685 moonbr_poll_fds[listener->pollidx].revents = 0;
jbe@0	1686 moonbr_remove_idle_listener(listener);
jbe@0	1687 moonbr_add_connected_listener(listener);
jbe@0	1688 }
jbe@0	1689 } else if (listener->proto == MOONBR_PROTO_INTERVAL) {
jbe@0	1690 if (!timercmp(&listener->proto_specific.interval.wakeup, &now, >)) {
jbe@0	1691 moonbr_remove_idle_listener(listener);
jbe@0	1692 moonbr_add_connected_listener(listener);
jbe@0	1693 }
jbe@0	1694 } else {
jbe@0	1695 moonbr_log(LOG_CRIT, "Internal error (should not happen): Listener is neither an interval timer nor has the 'pollidx' value set");
jbe@0	1696 moonbr_terminate_error();
jbe@0	1697 }
jbe@0	1698 }
jbe@0	1699 /* process input from child processes */
jbe@0	1700 for (i=0; i<moonbr_poll_worker_count; i++) {
jbe@0	1701 if (moonbr_poll_worker_fds[i].revents) {
jbe@0	1702 moonbr_poll_worker_fds[i].revents = 0;
jbe@0	1703 struct moonbr_poll_worker *poll_worker = &moonbr_poll_workers[i];
jbe@0	1704 switch (poll_worker->channel) {
jbe@0	1705 case MOONBR_POLL_WORKER_CONTROLCHANNEL:
jbe@0	1706 moonbr_read_controlchannel(poll_worker->worker);
jbe@0	1707 moonbr_interval_restart(poll_worker->worker, &now);
jbe@0	1708 break;
jbe@0	1709 case MOONBR_POLL_WORKER_ERRORCHANNEL:
jbe@0	1710 moonbr_read_errorchannel(poll_worker->worker);
jbe@0	1711 break;
jbe@0	1712 }
jbe@0	1713 }
jbe@0	1714 }
jbe@0	1715 /* collect dead child processes */
jbe@0	1716 for (worker=pool->first_worker; worker; worker=next_worker) {
jbe@0	1717 next_worker = worker->next_worker; /* extra variable necessary due to changing list */
jbe@0	1718 switch (moonbr_try_destroy_worker(worker)) {
jbe@0	1719 case MOONBR_DESTROY_PREPARE:
jbe@0	1720 pool->use_fork_error_wakeup = 1;
jbe@0	1721 break;
jbe@0	1722 case MOONBR_DESTROY_IDLE_OR_ASSIGNED:
jbe@0	1723 terminated_worker_count++;
jbe@0	1724 break;
jbe@0	1725 }
jbe@0	1726 }
jbe@0	1727 /* connect listeners with idle workers */
jbe@0	1728 if (!moonbr_shutdown_in_progress) {
jbe@0	1729 while (pool->first_connected_listener && pool->first_idle_worker) {
jbe@0	1730 moonbr_connect(pool);
jbe@0	1731 }
jbe@0	1732 }
jbe@0	1733 /* create new worker processes */
jbe@0	1734 while (
jbe@0	1735 pool->total_worker_count < pool->max_fork && (
jbe@0	1736 pool->unassigned_worker_count < pool->pre_fork \|\|
jbe@0	1737 pool->total_worker_count < pool->min_fork
jbe@0	1738 )
jbe@0	1739 ) {
jbe@0	1740 if (pool->use_fork_error_wakeup) {
jbe@0	1741 if (timercmp(&pool->fork_error_wakeup, &now, >)) {
jbe@0	1742 moonbr_calc_wait(&wait, &pool->fork_error_wakeup);
jbe@0	1743 break;
jbe@0	1744 }
jbe@0	1745 } else {
jbe@0	1746 if (terminated_worker_count) {
jbe@0	1747 terminated_worker_count--;
jbe@0	1748 } else if (timercmp(&pool->fork_wakeup, &now, >)) {
jbe@0	1749 moonbr_calc_wait(&wait, &pool->fork_wakeup);
jbe@0	1750 break;
jbe@0	1751 }
jbe@0	1752 }
jbe@0	1753 if (moonbr_create_worker(pool, L)) {
jbe@0	1754 /* on error, enforce error delay */
jbe@0	1755 timeradd(&now, &pool->fork_error_delay, &pool->fork_error_wakeup);
jbe@0	1756 pool->use_fork_error_wakeup = 1;
jbe@0	1757 moonbr_calc_wait(&wait, &pool->fork_error_wakeup);
jbe@0	1758 break;
jbe@0	1759 } else {
jbe@0	1760 /* normal fork delay on success */
jbe@0	1761 timeradd(&now, &pool->fork_delay, &pool->fork_wakeup);
jbe@0	1762 timeradd(&now, &pool->fork_error_delay, &pool->fork_error_wakeup);
jbe@0	1763 pool->use_fork_error_wakeup = 0; /* gets set later if error occures during preparation */
jbe@0	1764 }
jbe@0	1765 }
jbe@0	1766 /* terminate excessive worker processes */
jbe@0	1767 while (
jbe@0	1768 pool->total_worker_count > pool->min_fork &&
jbe@0	1769 pool->idle_worker_count > pool->pre_fork
jbe@0	1770 ) {
jbe@0	1771 if (timerisset(&pool->exit_wakeup)) {
jbe@0	1772 if (timercmp(&pool->exit_wakeup, &now, >)) {
jbe@0	1773 moonbr_calc_wait(&wait, &pool->exit_wakeup);
jbe@0	1774 break;
jbe@0	1775 }
jbe@0	1776 moonbr_terminate_idle_worker(moonbr_pop_idle_worker(pool));
jbe@0	1777 timeradd(&now, &pool->exit_delay, &pool->exit_wakeup);
jbe@0	1778 } else {
jbe@0	1779 timeradd(&now, &pool->exit_delay, &pool->exit_wakeup);
jbe@0	1780 break;
jbe@0	1781 }
jbe@0	1782 }
jbe@0	1783 if (!(
jbe@0	1784 pool->total_worker_count > pool->min_fork &&
jbe@0	1785 pool->idle_worker_count > pool->pre_fork
jbe@0	1786 )) {
jbe@0	1787 timerclear(&pool->exit_wakeup); /* timer gets restarted later when there are excessive workers */
jbe@0	1788 }
jbe@0	1789 /* optionally output worker count stats */
jbe@0	1790 if (moonbr_stat && pool->worker_count_stat) {
jbe@0	1791 pool->worker_count_stat = 0;
jbe@0	1792 moonbr_log(
jbe@0	1793 LOG_INFO,
jbe@0	1794 "Worker count for pool #%i: %i idle, %i assigned, %i total",
jbe@0	1795 pool->poolnum, pool->idle_worker_count,
jbe@0	1796 pool->total_worker_count - pool->unassigned_worker_count,
jbe@0	1797 pool->total_worker_count);
jbe@0	1798 }
jbe@0	1799 /* calculate wakeup time for interval listeners */
jbe@0	1800 for (listener=pool->first_idle_listener; listener; listener=listener->next_listener) {
jbe@0	1801 if (listener->proto == MOONBR_PROTO_INTERVAL) {
jbe@0	1802 moonbr_calc_wait(&wait, &listener->proto_specific.interval.wakeup);
jbe@0	1803 }
jbe@0	1804 }
jbe@0	1805 /* calculate wakeup time for idle workers (only first idle worker is significant) */
jbe@0	1806 if (timerisset(&pool->idle_timeout) && pool->first_idle_worker) {
jbe@0	1807 moonbr_calc_wait(&wait, &pool->first_idle_worker->idle_expiration);
jbe@0	1808 }
jbe@0	1809 }
jbe@0	1810 /* check if shutdown is complete */
jbe@0	1811 if (moonbr_shutdown_in_progress) {
jbe@0	1812 for (pool=moonbr_first_pool; pool; pool=pool->next_pool) {
jbe@0	1813 if (pool->first_worker) break;
jbe@0	1814 }
jbe@0	1815 if (!pool) {
jbe@0	1816 moonbr_log(LOG_INFO, "All worker threads have terminated");
jbe@0	1817 moonbr_terminate(MOONBR_EXITCODE_GRACEFUL);
jbe@0	1818 }
jbe@0	1819 }
jbe@0	1820 if (moonbr_poll_refresh_needed) moonbr_poll_refresh();
jbe@0	1821 moonbr_cond_poll = 1;
jbe@0	1822 if (!moonbr_cond_child && !moonbr_cond_terminate && !moonbr_cond_interrupt) {
jbe@0	1823 int timeout;
jbe@0	1824 if (timerisset(&wait)) {
jbe@0	1825 if (timercmp(&wait, &now, <)) {
jbe@0	1826 moonbr_log(LOG_CRIT, "Internal error (should not happen): Future is in the past");
jbe@0	1827 moonbr_terminate_error();
jbe@0	1828 }
jbe@0	1829 timersub(&wait, &now, &wait);
jbe@0	1830 timeout = wait.tv_sec * 1000 + wait.tv_usec / 1000;
jbe@0	1831 } else {
jbe@0	1832 timeout = INFTIM;
jbe@0	1833 }
jbe@0	1834 if (moonbr_debug) {
jbe@0	1835 moonbr_log(LOG_DEBUG, "Waiting for I/O");
jbe@0	1836 }
jbe@0	1837 poll(moonbr_poll_fds, moonbr_poll_fds_count, timeout);
jbe@0	1838 } else {
jbe@0	1839 if (moonbr_debug) {
jbe@0	1840 moonbr_log(LOG_DEBUG, "Do not wait for I/O");
jbe@0	1841 }
jbe@0	1842 }
jbe@0	1843 moonbr_cond_poll = 0;
jbe@0	1844 moonbr_poll_reset_signal();
jbe@0	1845 }
jbe@0	1846 }
jbe@0	1847
jbe@0	1848
jbe@0	1849 /* Lua interface */
jbe@0	1850
jbe@0	1851 static int moonbr_lua_panic(lua_State *L) {
jbe@0	1852 const char *errmsg;
jbe@0	1853 errmsg = lua_tostring(L, -1);
jbe@0	1854 if (!errmsg) {
jbe@0	1855 if (lua_isnoneornil(L, -1)) errmsg = "(error message is nil)";
jbe@0	1856 else errmsg = "(error message is not a string)";
jbe@0	1857 }
jbe@0	1858 if (moonbr_pstate == MOONBR_PSTATE_FORKED) {
jbe@0	1859 fprintf(stderr, "Uncaught Lua error: %s\n", errmsg);
jbe@0	1860 exit(1);
jbe@0	1861 } else {
jbe@0	1862 moonbr_log(LOG_CRIT, "Uncaught Lua error: %s", errmsg);
jbe@0	1863 moonbr_terminate_error();
jbe@0	1864 }
jbe@0	1865 return 0;
jbe@0	1866 }
jbe@0	1867
jbe@0	1868 static int moonbr_addtraceback(lua_State *L) {
jbe@0	1869 luaL_traceback(L, L, luaL_tolstring(L, 1, NULL), 1);
jbe@0	1870 return 1;
jbe@0	1871 }
jbe@0	1872
jbe@0	1873 /* Memory allocator that allows limiting memory consumption */
jbe@0	1874 static void moonbr_alloc (void ud, void *ptr, size_t osize, size_t nsize) {
jbe@0	1875 (void)ud; /* not used */
jbe@0	1876 if (nsize == 0) {
jbe@0	1877 if (ptr) {
jbe@0	1878 moonbr_memory_usage -= osize;
jbe@0	1879 free(ptr);
jbe@0	1880 }
jbe@0	1881 return NULL;
jbe@0	1882 } else if (ptr) {
jbe@0	1883 if (
jbe@0	1884 moonbr_memory_limit &&
jbe@0	1885 nsize > osize &&
jbe@0	1886 moonbr_memory_usage + (nsize - osize) > moonbr_memory_limit
jbe@0	1887 ) {
jbe@0	1888 return NULL;
jbe@0	1889 } else {
jbe@0	1890 ptr = realloc(ptr, nsize);
jbe@0	1891 if (ptr) moonbr_memory_usage += nsize - osize;
jbe@0	1892 }
jbe@0	1893 } else {
jbe@0	1894 if (
jbe@0	1895 moonbr_memory_limit &&
jbe@0	1896 moonbr_memory_usage + nsize > moonbr_memory_limit
jbe@0	1897 ) {
jbe@0	1898 return NULL;
jbe@0	1899 } else {
jbe@0	1900 ptr = realloc(ptr, nsize);
jbe@0	1901 if (ptr) moonbr_memory_usage += nsize;
jbe@0	1902 }
jbe@0	1903 }
jbe@0	1904 return ptr;
jbe@0	1905 }
jbe@0	1906
jbe@78	1907 /* New method for Lua file objects: read until terminator or length exceeded */
jbe@78	1908 static int moonbr_readuntil(lua_State *L) {
jbe@78	1909 luaL_Stream *stream;
jbe@78	1910 FILE *file;
jbe@78	1911 const char *terminatorstr;
jbe@78	1912 size_t terminatorlen;
jbe@78	1913 luaL_Buffer buf;
jbe@78	1914 lua_Integer maxlen;
jbe@78	1915 char terminator;
jbe@78	1916 int byte;
jbe@78	1917 stream = luaL_checkudata(L, 1, LUA_FILEHANDLE);
jbe@78	1918 terminatorstr = luaL_checklstring(L, 2, &terminatorlen);
jbe@78	1919 luaL_argcheck(L, terminatorlen == 1, 2, "single byte expected");
jbe@78	1920 maxlen = luaL_optinteger(L, 3, 0);
jbe@78	1921 if (!stream->closef) luaL_error(L, "attempt to use a closed file");
jbe@78	1922 file = stream->f;
jbe@78	1923 luaL_buffinit(L, &buf);
jbe@78	1924 if (!maxlen) maxlen = -1;
jbe@78	1925 terminator = terminatorstr[0];
jbe@78	1926 while (maxlen > 0 ? maxlen-- : maxlen) {
jbe@78	1927 byte = fgetc(file);
jbe@78	1928 if (byte == EOF) {
jbe@78	1929 if (ferror(file)) {
jbe@78	1930 char errmsg[MOONBR_MAXSTRERRORLEN];
jbe@78	1931 strerror_r(errno, errmsg, MOONBR_MAXSTRERRORLEN); /* use thread-safe call in case child created threads */
jbe@78	1932 lua_pushnil(L);
jbe@78	1933 lua_pushstring(L, errmsg);
jbe@78	1934 return 2;
jbe@78	1935 } else {
jbe@78	1936 break;
jbe@78	1937 }
jbe@78	1938 }
jbe@78	1939 luaL_addchar(&buf, byte);
jbe@78	1940 if (byte == terminator) break;
jbe@78	1941 }
jbe@78	1942 luaL_pushresult(&buf);
jbe@78	1943 if (!lua_rawlen(L, -1)) lua_pushnil(L);
jbe@78	1944 return 1;
jbe@78	1945 }
jbe@78	1946
jbe@66	1947 static int moonbr_lua_tonatural(lua_State *L, int idx) {
jbe@66	1948 int isnum;
jbe@66	1949 lua_Number n;
jbe@66	1950 n = lua_tonumberx(L, idx, &isnum);
jbe@66	1951 if (isnum && n>=0 && n<INT_MAX && (lua_Number)(int)n == n) return n;
jbe@66	1952 else return -1;
jbe@66	1953 }
jbe@66	1954
jbe@66	1955 static int moonbr_lua_totimeval(lua_State L, int idx, struct timeval value) {
jbe@66	1956 int isnum;
jbe@66	1957 lua_Number n;
jbe@66	1958 n = lua_tonumberx(L, idx, &isnum);
jbe@66	1959 if (isnum && n>=0 && n<=100000000) {
jbe@66	1960 value->tv_sec = n;
jbe@66	1961 value->tv_usec = 1e6 * (n - value->tv_sec);
jbe@66	1962 return 1;
jbe@66	1963 } else {
jbe@66	1964 return 0;
jbe@66	1965 }
jbe@66	1966 }
jbe@66	1967
jbe@0	1968 static int moonbr_timeout(lua_State *L) {
jbe@0	1969 struct itimerval oldval;
jbe@0	1970 if (lua_isnoneornil(L, 1) && lua_isnoneornil(L, 2)) {
jbe@0	1971 getitimer(ITIMER_REAL, &oldval);
jbe@0	1972 } else {
jbe@0	1973 struct itimerval newval = {};
jbe@39	1974 timerclear(&newval.it_interval);
jbe@39	1975 timerclear(&newval.it_value);
jbe@0	1976 if (lua_toboolean(L, 1)) {
jbe@0	1977 luaL_argcheck(
jbe@0	1978 L, moonbr_lua_totimeval(L, 1, &newval.it_value), 1,
jbe@0	1979 "interval in seconds expected"
jbe@0	1980 );
jbe@0	1981 }
jbe@0	1982 if (lua_isnoneornil(L, 2)) {
jbe@0	1983 if (setitimer(ITIMER_REAL, &newval, &oldval)) {
jbe@0	1984 moonbr_log(LOG_CRIT, "Could not set ITIMER_REAL via setitimer()");
jbe@0	1985 moonbr_terminate_error();
jbe@0	1986 }
jbe@0	1987 } else {
jbe@0	1988 getitimer(ITIMER_REAL, &oldval);
jbe@39	1989 if (!timerisset(&oldval.it_value)) {
jbe@39	1990 if (setitimer(ITIMER_REAL, &newval, NULL)) {
jbe@39	1991 moonbr_log(LOG_CRIT, "Could not set ITIMER_REAL via setitimer()");
jbe@39	1992 moonbr_terminate_error();
jbe@39	1993 }
jbe@39	1994 lua_call(L, lua_gettop(L) - 2, LUA_MULTRET);
jbe@39	1995 timerclear(&newval.it_value);
jbe@39	1996 if (setitimer(ITIMER_REAL, &newval, NULL)) {
jbe@39	1997 moonbr_log(LOG_CRIT, "Could not set ITIMER_REAL via setitimer()");
jbe@39	1998 moonbr_terminate_error();
jbe@39	1999 }
jbe@39	2000 } else if (timercmp(&newval.it_value, &oldval.it_value, <)) {
jbe@0	2001 struct itimerval remval;
jbe@0	2002 if (setitimer(ITIMER_REAL, &newval, NULL)) {
jbe@0	2003 moonbr_log(LOG_CRIT, "Could not set ITIMER_REAL via setitimer()");
jbe@0	2004 moonbr_terminate_error();
jbe@0	2005 }
jbe@0	2006 lua_call(L, lua_gettop(L) - 2, LUA_MULTRET);
jbe@0	2007 getitimer(ITIMER_REAL, &remval);
jbe@0	2008 timersub(&oldval.it_value, &newval.it_value, &newval.it_value);
jbe@0	2009 timeradd(&newval.it_value, &remval.it_value, &newval.it_value);
jbe@0	2010 if (setitimer(ITIMER_REAL, &newval, NULL)) {
jbe@0	2011 moonbr_log(LOG_CRIT, "Could not set ITIMER_REAL via setitimer()");
jbe@0	2012 moonbr_terminate_error();
jbe@0	2013 }
jbe@0	2014 } else {
jbe@0	2015 lua_call(L, lua_gettop(L) - 2, LUA_MULTRET);
jbe@0	2016 }
jbe@0	2017 return lua_gettop(L) - 1;
jbe@0	2018 }
jbe@0	2019 }
jbe@115	2020 lua_pushnumber(L, oldval.it_value.tv_sec + 1e-6 * oldval.it_value.tv_usec);
jbe@0	2021 return 1;
jbe@0	2022 }
jbe@0	2023
jbe@0	2024 #define moonbr_listen_init_pool_forkoption(luaname, cname, defval) { \
jbe@0	2025 lua_getfield(L, 2, luaname); \
jbe@0	2026 pool->cname = lua_isnil(L, -1) ? (defval) : moonbr_lua_tonatural(L, -1); \
jbe@0	2027 } while(0)
jbe@0	2028
jbe@0	2029 #define moonbr_listen_init_pool_timeoption(luaname, cname, defval, defvalu) ( \
jbe@0	2030 lua_getfield(L, 2, luaname), \
jbe@0	2031 lua_isnil(L, -1) ? ( \
jbe@0	2032 pool->cname.tv_sec = (defval), pool->cname.tv_usec = (defvalu), \
jbe@0	2033 1 \
jbe@0	2034 ) : ( \
jbe@0	2035 (lua_isboolean(L, -1) && !lua_toboolean(L, -1)) ? ( \
jbe@0	2036 pool->cname.tv_sec = 0, pool->cname.tv_usec = 0, \
jbe@0	2037 1 \
jbe@0	2038 ) : ( \
jbe@0	2039 moonbr_lua_totimeval(L, -1, &pool->cname) \
jbe@0	2040 ) \
jbe@0	2041 ) \
jbe@0	2042 )
jbe@0	2043
jbe@0	2044 static int moonbr_listen_init_pool(lua_State *L) {
jbe@0	2045 struct moonbr_pool *pool;
jbe@0	2046 const char *proto;
jbe@0	2047 int i;
jbe@0	2048 pool = lua_touserdata(L, 1);
jbe@0	2049 for (i=0; i<pool->listener_count; i++) {
jbe@0	2050 struct moonbr_listener *listener = &pool->listener[i];
jbe@0	2051 lua_settop(L, 2);
jbe@3	2052 #if LUA_VERSION_NUM >= 503
jbe@3	2053 lua_geti(L, 2, i+1);
jbe@3	2054 #else
jbe@0	2055 lua_pushinteger(L, i+1);
jbe@0	2056 lua_gettable(L, 2);
jbe@3	2057 #endif
jbe@0	2058 lua_getfield(L, 3, "proto");
jbe@0	2059 proto = lua_tostring(L, -1);
jbe@0	2060 if (proto && !strcmp(proto, "interval")) {
jbe@0	2061 listener->proto = MOONBR_PROTO_INTERVAL;
jbe@0	2062 lua_getfield(L, 3, "name");
jbe@0	2063 {
jbe@0	2064 const char *name = lua_tostring(L, -1);
jbe@0	2065 if (name) {
jbe@0	2066 if (asprintf(&listener->proto_specific.interval.name, "%s", name) < 0) {
jbe@0	2067 moonbr_log(LOG_CRIT, "Memory allocation_error");
jbe@0	2068 moonbr_terminate_error();
jbe@0	2069 }
jbe@0	2070 }
jbe@0	2071 }
jbe@0	2072 lua_getfield(L, 3, "delay");
jbe@0	2073 if (
jbe@0	2074 !moonbr_lua_totimeval(L, -1, &listener->proto_specific.interval.delay) \|\|
jbe@0	2075 !timerisset(&listener->proto_specific.interval.delay)
jbe@0	2076 ) {
jbe@0	2077 luaL_error(L, "No valid interval delay specified; use listen{{proto=\"interval\", delay=...}, ...}");
jbe@0	2078 }
jbe@0	2079 lua_getfield(L, 3, "strict");
jbe@0	2080 if (!lua_isnil(L, -1)) {
jbe@0	2081 if (lua_isboolean(L, -1)) {
jbe@0	2082 if (lua_toboolean(L, -1)) listener->proto_specific.interval.strict = 1;
jbe@0	2083 } else {
jbe@0	2084 luaL_error(L, "Option \"strict\" must be a boolean if set; use listen{{proto=\"interval\", strict=true, ...}, ...}");
jbe@0	2085 }
jbe@0	2086 }
jbe@0	2087 } else if (proto && !strcmp(proto, "local")) {
jbe@0	2088 listener->proto = MOONBR_PROTO_LOCAL;
jbe@0	2089 lua_getfield(L, 3, "path");
jbe@0	2090 {
jbe@0	2091 const char *path = lua_tostring(L, -1);
jbe@0	2092 if (!path) {
jbe@0	2093 luaL_error(L, "No valid path specified for local socket; use listen{{proto=\"local\", path=...}, ...}");
jbe@0	2094 }
jbe@0	2095 if (asprintf(&listener->proto_specific.local.path, "%s", path) < 0) {
jbe@0	2096 moonbr_log(LOG_CRIT, "Memory allocation_error");
jbe@0	2097 moonbr_terminate_error();
jbe@0	2098 }
jbe@0	2099 }
jbe@0	2100 } else if (proto && !strcmp(proto, "tcp6")) {
jbe@0	2101 listener->proto = MOONBR_PROTO_TCP6;
jbe@0	2102 lua_getfield(L, 3, "port");
jbe@0	2103 listener->proto_specific.tcp.port = lua_tointeger(L, -1);
jbe@0	2104 if (
jbe@0	2105 listener->proto_specific.tcp.port < 1 \|\|
jbe@0	2106 listener->proto_specific.tcp.port > 65535
jbe@0	2107 ) {
jbe@0	2108 luaL_error(L, "No valid port number specified; use listen{{proto=\"tcp6\", port=...}, ...}");
jbe@0	2109 }
jbe@0	2110 lua_getfield(L, 3, "localhost");
jbe@0	2111 if (!lua_isnil(L, -1)) {
jbe@0	2112 if (lua_isboolean(L, -1)) {
jbe@0	2113 if (lua_toboolean(L, -1)) listener->proto_specific.tcp.localhost_only = 1;
jbe@0	2114 } else {
jbe@0	2115 luaL_error(L, "Option \"localhost\" must be a boolean if set; use listen{{proto=\"tcp6\", localhost=true, ...}, ...}");
jbe@0	2116 }
jbe@0	2117 }
jbe@0	2118 } else if (proto && !strcmp(proto, "tcp4")) {
jbe@0	2119 listener->proto = MOONBR_PROTO_TCP4;
jbe@0	2120 lua_getfield(L, 3, "port");
jbe@0	2121 listener->proto_specific.tcp.port = lua_tointeger(L, -1);
jbe@0	2122 if (
jbe@0	2123 listener->proto_specific.tcp.port < 1 \|\|
jbe@0	2124 listener->proto_specific.tcp.port > 65535
jbe@0	2125 ) {
jbe@0	2126 luaL_error(L, "No valid port number specified; use listen{{proto=\"tcp4\", port=...}, ...}");
jbe@0	2127 }
jbe@0	2128 lua_getfield(L, 3, "localhost");
jbe@0	2129 if (!lua_isnil(L, -1)) {
jbe@0	2130 if (lua_isboolean(L, -1)) {
jbe@0	2131 if (lua_toboolean(L, -1)) listener->proto_specific.tcp.localhost_only = 1;
jbe@0	2132 } else {
jbe@0	2133 luaL_error(L, "Option \"localhost\" must be a boolean if set; use listen{{proto=\"tcp4\", localhost=true, ...}, ...}");
jbe@0	2134 }
jbe@0	2135 }
jbe@0	2136 }
jbe@0	2137 }
jbe@0	2138 lua_settop(L, 2);
jbe@0	2139 moonbr_listen_init_pool_forkoption("pre_fork", pre_fork, 1);
jbe@0	2140 moonbr_listen_init_pool_forkoption("min_fork", min_fork, pool->pre_fork > 2 ? pool->pre_fork : 2);
jbe@0	2141 moonbr_listen_init_pool_forkoption("max_fork", max_fork, pool->min_fork > 16 ? pool->min_fork : 16);
jbe@61	2142 if (!moonbr_listen_init_pool_timeoption("fork_delay", fork_delay, 0, 250000)) {
jbe@0	2143 luaL_error(L, "Option \"fork_delay\" is expected to be a non-negative number");
jbe@0	2144 }
jbe@0	2145 if (!moonbr_listen_init_pool_timeoption("fork_error_delay", fork_error_delay, 2, 0)) {
jbe@0	2146 luaL_error(L, "Option \"fork_error_delay\" is expected to be a non-negative number");
jbe@0	2147 }
jbe@0	2148 if (!moonbr_listen_init_pool_timeoption("exit_delay", exit_delay, 60, 0)) {
jbe@0	2149 luaL_error(L, "Option \"exit_delay\" is expected to be a non-negative number");
jbe@0	2150 }
jbe@0	2151 if (timercmp(&pool->fork_error_delay, &pool->fork_delay, <)) {
jbe@0	2152 pool->fork_error_delay = pool->fork_delay;
jbe@0	2153 }
jbe@0	2154 if (!moonbr_listen_init_pool_timeoption("idle_timeout", idle_timeout, 0, 0)) {
jbe@0	2155 luaL_error(L, "Option \"idle_timeout\" is expected to be a non-negative number");
jbe@0	2156 }
jbe@0	2157 lua_getfield(L, 2, "memory_limit");
jbe@0	2158 if (!lua_isnil(L, -1)) {
jbe@0	2159 int isnum;
jbe@0	2160 lua_Number n;
jbe@0	2161 n = lua_tonumberx(L, -1, &isnum);
jbe@0	2162 if (n < 0 \|\| !isnum) {
jbe@0	2163 luaL_error(L, "Option \"memory_limit\" is expected to be a non-negative number");
jbe@0	2164 }
jbe@0	2165 pool->memory_limit = n;
jbe@0	2166 }
jbe@0	2167 lua_settop(L, 2);
jbe@0	2168 lua_getfield(L, 2, "prepare");
jbe@0	2169 if (!lua_isnil(L, -1) && !lua_isfunction(L, -1)) {
jbe@0	2170 luaL_error(L, "Option \"prepare\" must be nil or a function");
jbe@0	2171 }
jbe@0	2172 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_prepare_func(pool));
jbe@0	2173 lua_getfield(L, 2, "connect");
jbe@0	2174 if (!lua_isfunction(L, -1)) {
jbe@0	2175 luaL_error(L, "Option \"connect\" must be a function; use listen{{...}, {...}, connect=function(socket) ... end, ...}");
jbe@0	2176 }
jbe@0	2177 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_connect_func(pool));
jbe@0	2178 lua_getfield(L, 2, "finish");
jbe@0	2179 if (!lua_isnil(L, -1) && !lua_isfunction(L, -1)) {
jbe@0	2180 luaL_error(L, "Option \"finish\" must be nil or a function");
jbe@0	2181 }
jbe@0	2182 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_finish_func(pool));
jbe@0	2183 return 0;
jbe@0	2184 }
jbe@0	2185
jbe@0	2186 static int moonbr_listen(lua_State *L) {
jbe@0	2187 struct moonbr_pool *pool;
jbe@0	2188 lua_Integer listener_count;
jbe@0	2189 if (moonbr_booted) luaL_error(L, "Moonbridge bootup is already complete");
jbe@0	2190 luaL_checktype(L, 1, LUA_TTABLE);
jbe@0	2191 listener_count = luaL_len(L, 1);
jbe@0	2192 if (!listener_count) luaL_error(L, "No listen ports specified; use listen{{proto=..., port=...},...}");
jbe@0	2193 if (listener_count > 100) luaL_error(L, "Too many listeners");
jbe@0	2194 pool = moonbr_create_pool(listener_count);
jbe@0	2195 lua_pushcfunction(L, moonbr_listen_init_pool);
jbe@0	2196 lua_pushlightuserdata(L, pool);
jbe@0	2197 lua_pushvalue(L, 1);
jbe@0	2198 if (lua_pcall(L, 2, 0, 0)) goto moonbr_listen_error;
jbe@0	2199 {
jbe@0	2200 int i;
jbe@0	2201 i = moonbr_start_pool(pool);
jbe@0	2202 if (i >= 0) {
jbe@0	2203 struct moonbr_listener *listener = &pool->listener[i];
jbe@0	2204 switch (listener->proto) {
jbe@0	2205 case MOONBR_PROTO_INTERVAL:
jbe@0	2206 lua_pushfstring(L, "Could not initialize listener #%d (proto=\"interval\"): %s", i+1, strerror(errno));
jbe@0	2207 break;
jbe@0	2208 case MOONBR_PROTO_LOCAL:
jbe@0	2209 lua_pushfstring(L, "Could not initialize listener #%d (proto=\"local\", path=\"%s\"): %s", i+1, listener->proto_specific.local.path, strerror(errno));
jbe@0	2210 break;
jbe@0	2211 case MOONBR_PROTO_TCP6:
jbe@0	2212 lua_pushfstring(L, "Could not initialize listener #%d (proto=\"tcp6\", port=%d): %s", i+1, listener->proto_specific.tcp.port, strerror(errno));
jbe@0	2213 break;
jbe@0	2214 case MOONBR_PROTO_TCP4:
jbe@0	2215 lua_pushfstring(L, "Could not initialize listener #%d (proto=\"tcp4\", port=%d): %s", i+1, listener->proto_specific.tcp.port, strerror(errno));
jbe@0	2216 break;
jbe@0	2217 default:
jbe@0	2218 moonbr_log(LOG_ERR, "Internal error (should not happen): Unexpected value in listener.proto field");
jbe@0	2219 moonbr_terminate_error();
jbe@0	2220 }
jbe@0	2221 goto moonbr_listen_error;
jbe@0	2222 }
jbe@0	2223 }
jbe@0	2224 return 0;
jbe@0	2225 moonbr_listen_error:
jbe@0	2226 moonbr_destroy_pool(pool);
jbe@0	2227 lua_pushnil(L);
jbe@0	2228 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_prepare_func(pool));
jbe@0	2229 lua_pushnil(L);
jbe@0	2230 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_connect_func(pool));
jbe@0	2231 lua_pushnil(L);
jbe@0	2232 lua_rawsetp(L, LUA_REGISTRYINDEX, moonbr_luakey_finish_func(pool));
jbe@0	2233 lua_error(L);
jbe@17	2234 return 0; /* avoid compiler warning */
jbe@0	2235 }
jbe@0	2236
jbe@0	2237
jbe@9	2238 /* Function to modify Lua's library path and/or cpath */
jbe@9	2239
jbe@9	2240 #if defined(MOONBR_LUA_PATH) \|\| defined(MOONBR_LUA_CPATH)
jbe@9	2241 static void moonbr_modify_path(lua_State L, char key, char *value) {
jbe@9	2242 int stackbase;
jbe@9	2243 stackbase = lua_gettop(L);
jbe@9	2244 lua_getglobal(L, "package");
jbe@9	2245 lua_getfield(L, stackbase+1, key);
jbe@9	2246 {
jbe@9	2247 const char *current_str;
jbe@9	2248 size_t current_strlen;
jbe@9	2249 luaL_Buffer buf;
jbe@9	2250 current_str = lua_tolstring(L, stackbase+2, &current_strlen);
jbe@9	2251 luaL_buffinit(L, &buf);
jbe@9	2252 if (current_str) {
jbe@9	2253 lua_pushvalue(L, stackbase+2);
jbe@9	2254 luaL_addvalue(&buf);
jbe@9	2255 if (current_strlen && current_str[current_strlen-1] != ';') {
jbe@9	2256 luaL_addchar(&buf, ';');
jbe@9	2257 }
jbe@9	2258 }
jbe@9	2259 luaL_addstring(&buf, value);
jbe@9	2260 luaL_pushresult(&buf);
jbe@9	2261 }
jbe@9	2262 lua_setfield(L, stackbase+1, key);
jbe@9	2263 lua_settop(L, stackbase);
jbe@9	2264 }
jbe@9	2265 #endif
jbe@9	2266
jbe@9	2267
jbe@0	2268 /* Main function and command line invokation */
jbe@0	2269
jbe@0	2270 static void moonbr_usage(int err, const char *cmd) {
jbe@0	2271 FILE *out;
jbe@0	2272 out = err ? stderr : stdout;
jbe@0	2273 if (!cmd) cmd = "moonbridge";
jbe@0	2274 fprintf(out, "Get this help message: %s {-h\|--help}\n", cmd);
jbe@0	2275 fprintf(out, "Usage: %s \\\n", cmd);
jbe@0	2276 fprintf(out, " [-b\|--background] \\\n");
jbe@0	2277 fprintf(out, " [-d\|--debug] \\\n");
jbe@0	2278 fprintf(out, " [-f\|--logfacility {DAEMON\|USER\|0\|1\|...\|7}] \\\n");
jbe@0	2279 fprintf(out, " [-i\|--logident <syslog ident> \\\n");
jbe@0	2280 fprintf(out, " [-l\|--logfile <logfile>] \\\n");
jbe@0	2281 fprintf(out, " [-p\|--pidfile <pidfile>] \\\n");
jbe@0	2282 fprintf(out, " [-s\|--stats] \\\n");
jbe@2	2283 fprintf(out, " -- <Lua script> [<cmdline options for Lua script>]\n");
jbe@0	2284 exit(err);
jbe@0	2285 }
jbe@0	2286
jbe@0	2287 #define moonbr_usage_error() moonbr_usage(MOONBR_EXITCODE_CMDLINEERROR, argc ? argv[0] : NULL)
jbe@0	2288
jbe@0	2289 int main(int argc, char **argv) {
jbe@0	2290 {
jbe@0	2291 int daemonize = 0;
jbe@0	2292 int log_facility = LOG_USER;
jbe@0	2293 const char *log_ident = "moonbridge";
jbe@0	2294 const char *log_filename = NULL;
jbe@0	2295 const char *pid_filename = NULL;
jbe@0	2296 int option;
jbe@0	2297 struct option longopts[] = {
jbe@0	2298 { "background", no_argument, NULL, 'b' },
jbe@0	2299 { "debug", no_argument, NULL, 'd' },
jbe@0	2300 { "logfacility", required_argument, NULL, 'f' },
jbe@0	2301 { "help", no_argument, NULL, 'h' },
jbe@0	2302 { "logident", required_argument, NULL, 'i' },
jbe@0	2303 { "logfile", required_argument, NULL, 'l' },
jbe@0	2304 { "pidfile", required_argument, NULL, 'p' },
jbe@0	2305 { "stats", no_argument, NULL, 's' }
jbe@0	2306 };
jbe@0	2307 while ((option = getopt_long(argc, argv, "bdf:hi:l:p:s", longopts, NULL)) != -1) {
jbe@0	2308 switch (option) {
jbe@0	2309 case 'b':
jbe@0	2310 daemonize = 1;
jbe@0	2311 break;
jbe@0	2312 case 'd':
jbe@0	2313 moonbr_debug = 1;
jbe@0	2314 moonbr_stat = 1;
jbe@0	2315 break;
jbe@0	2316 case 'f':
jbe@0	2317 if (!strcmp(optarg, "DAEMON")) {
jbe@0	2318 log_facility = LOG_DAEMON;
jbe@0	2319 } else if (!strcmp(optarg, "USER")) {
jbe@0	2320 log_facility = LOG_USER;
jbe@0	2321 } else if (!strcmp(optarg, "0")) {
jbe@0	2322 log_facility = LOG_LOCAL0;
jbe@0	2323 } else if (!strcmp(optarg, "1")) {
jbe@0	2324 log_facility = LOG_LOCAL1;
jbe@0	2325 } else if (!strcmp(optarg, "2")) {
jbe@0	2326 log_facility = LOG_LOCAL2;
jbe@0	2327 } else if (!strcmp(optarg, "3")) {
jbe@0	2328 log_facility = LOG_LOCAL3;
jbe@0	2329 } else if (!strcmp(optarg, "4")) {
jbe@0	2330 log_facility = LOG_LOCAL4;
jbe@0	2331 } else if (!strcmp(optarg, "5")) {
jbe@0	2332 log_facility = LOG_LOCAL5;
jbe@0	2333 } else if (!strcmp(optarg, "6")) {
jbe@0	2334 log_facility = LOG_LOCAL6;
jbe@0	2335 } else if (!strcmp(optarg, "7")) {
jbe@0	2336 log_facility = LOG_LOCAL7;
jbe@0	2337 } else {
jbe@0	2338 moonbr_usage_error();
jbe@0	2339 }
jbe@0	2340 moonbr_use_syslog = 1;
jbe@0	2341 break;
jbe@0	2342 case 'h':
jbe@0	2343 moonbr_usage(MOONBR_EXITCODE_GRACEFUL, argv[0]);
jbe@0	2344 break;
jbe@0	2345 case 'i':
jbe@0	2346 log_ident = optarg;
jbe@0	2347 moonbr_use_syslog = 1;
jbe@0	2348 break;
jbe@0	2349 case 'l':
jbe@0	2350 log_filename = optarg;
jbe@0	2351 break;
jbe@0	2352 case 'p':
jbe@0	2353 pid_filename = optarg;
jbe@0	2354 break;
jbe@0	2355 case 's':
jbe@0	2356 moonbr_stat = 1;
jbe@0	2357 break;
jbe@0	2358 default:
jbe@0	2359 moonbr_usage_error();
jbe@0	2360 }
jbe@0	2361 }
jbe@2	2362 if (argc - optind < 1) moonbr_usage_error();
jbe@0	2363 if (pid_filename) {
jbe@0	2364 pid_t otherpid;
jbe@0	2365 while ((moonbr_pidfh = pidfile_open(pid_filename, 0644, &otherpid)) == NULL) {
jbe@0	2366 if (errno == EEXIST) {
jbe@0	2367 if (otherpid == -1) {
jbe@0	2368 fprintf(stderr, "PID file \"%s\" is already locked\n", pid_filename);
jbe@0	2369 } else {
jbe@0	2370 fprintf(stderr, "PID file \"%s\" is already locked by process with PID: %i\n", pid_filename, (int)otherpid);
jbe@0	2371 }
jbe@0	2372 exit(MOONBR_EXITCODE_ALREADYRUNNING);
jbe@0	2373 } else if (errno != EINTR) {
jbe@0	2374 fprintf(stderr, "Could not write PID file \"%s\": %s\n", pid_filename, strerror(errno));
jbe@0	2375 exit(MOONBR_EXITCODE_STARTUPERROR);
jbe@0	2376 }
jbe@0	2377 }
jbe@0	2378 }
jbe@0	2379 if (log_filename) {
jbe@0	2380 int logfd;
jbe@0	2381 while (
jbe@0	2382 ( logfd = flopen(
jbe@0	2383 log_filename,
jbe@0	2384 O_WRONLY\|O_NONBLOCK\|O_CREAT\|O_APPEND\|O_CLOEXEC,
jbe@0	2385 0640
jbe@0	2386 )
jbe@0	2387 ) < 0
jbe@0	2388 ) {
jbe@0	2389 if (errno == EWOULDBLOCK) {
jbe@0	2390 fprintf(stderr, "Logfile \"%s\" is locked\n", log_filename);
jbe@0	2391 exit(MOONBR_EXITCODE_ALREADYRUNNING);
jbe@0	2392 } else if (errno != EINTR) {
jbe@0	2393 fprintf(stderr, "Could not open logfile \"%s\": %s\n", log_filename, strerror(errno));
jbe@0	2394 exit(MOONBR_EXITCODE_STARTUPERROR);
jbe@0	2395 }
jbe@0	2396 }
jbe@0	2397 moonbr_logfile = fdopen(logfd, "a");
jbe@0	2398 if (!moonbr_logfile) {
jbe@0	2399 fprintf(stderr, "Could not open write stream to logfile \"%s\": %s\n", log_filename, strerror(errno));
jbe@0	2400 exit(MOONBR_EXITCODE_STARTUPERROR);
jbe@0	2401 }
jbe@0	2402 }
jbe@0	2403 if (daemonize == 0 && !moonbr_logfile) moonbr_logfile = stderr;
jbe@0	2404 if (moonbr_logfile) setlinebuf(moonbr_logfile);
jbe@0	2405 else moonbr_use_syslog = 1;
jbe@0	2406 if (moonbr_use_syslog) openlog(log_ident, LOG_NDELAY \| LOG_PID, log_facility);
jbe@0	2407 if (daemonize) {
jbe@0	2408 if (daemon(1, 0)) {
jbe@0	2409 moonbr_log(LOG_ERR, "Could not daemonize moonbridge process");
jbe@0	2410 moonbr_terminate_error();
jbe@0	2411 }
jbe@0	2412 }
jbe@0	2413 }
jbe@0	2414 moonbr_log(LOG_NOTICE, "Starting moonbridge server");
jbe@0	2415 if (moonbr_pidfh && pidfile_write(moonbr_pidfh)) {
jbe@0	2416 moonbr_log(LOG_ERR, "Could not write pidfile (after locking)");
jbe@0	2417 }
jbe@0	2418 {
jbe@0	2419 lua_State *L;
jbe@0	2420 L = lua_newstate(moonbr_alloc, NULL);
jbe@0	2421 if (!L) {
jbe@0	2422 moonbr_log(LOG_CRIT, "Could not initialize Lua state");
jbe@0	2423 moonbr_terminate_error();
jbe@0	2424 }
jbe@0	2425 lua_atpanic(L, moonbr_lua_panic);
jbe@58	2426 lua_pushliteral(L, MOONBR_VERSION_STRING);
jbe@58	2427 lua_setglobal(L, "_MOONBRIDGE_VERSION");
jbe@0	2428 luaL_openlibs(L);
jbe@89	2429 luaL_requiref(L, "moonbridge_io", luaopen_moonbridge_io, 1);
jbe@89	2430 lua_pop(L, 1);
jbe@8	2431 #ifdef MOONBR_LUA_PATH
jbe@9	2432 moonbr_modify_path(L, "path", MOONBR_LUA_PATH);
jbe@9	2433 #endif
jbe@9	2434 #ifdef MOONBR_LUA_CPATH
jbe@9	2435 moonbr_modify_path(L, "cpath", MOONBR_LUA_CPATH);
jbe@8	2436 #endif
jbe@0	2437 if (luaL_newmetatable(L, LUA_FILEHANDLE)) {
jbe@0	2438 moonbr_log(LOG_CRIT, "Lua metatable LUA_FILEHANDLE does not exist");
jbe@0	2439 moonbr_terminate_error();
jbe@0	2440 }
jbe@0	2441 lua_getfield(L, -1, "__index");
jbe@78	2442 lua_pushcfunction(L, moonbr_readuntil);
jbe@78	2443 lua_setfield(L, -2, "readuntil");
jbe@0	2444 lua_pop(L, 2);
jbe@0	2445 lua_pushcfunction(L, moonbr_timeout);
jbe@0	2446 lua_setglobal(L, "timeout");
jbe@0	2447 lua_pushcfunction(L, moonbr_listen);
jbe@0	2448 lua_setglobal(L, "listen");
jbe@17	2449 lua_pushcfunction(L, moonbr_addtraceback); /* on stack position 1 */
jbe@2	2450 moonbr_log(LOG_INFO, "Loading \"%s\"", argv[optind]);
jbe@2	2451 if (luaL_loadfile(L, argv[optind])) {
jbe@2	2452 moonbr_log(LOG_ERR, "Error while loading \"%s\": %s", argv[optind], lua_tostring(L, -1));
jbe@2	2453 moonbr_terminate_error();
jbe@2	2454 }
jbe@2	2455 { int i; for (i=optind+1; i<argc; i++) lua_pushstring(L, argv[i]); }
jbe@2	2456 if (lua_pcall(L, argc-(optind+1), 0, 1)) {
jbe@2	2457 moonbr_log(LOG_ERR, "Error while executing \"%s\": %s", argv[optind], lua_tostring(L, -1));
jbe@2	2458 moonbr_terminate_error();
jbe@0	2459 }
jbe@6	2460 if (!moonbr_first_pool) {
jbe@6	2461 moonbr_log(LOG_WARNING, "No listener initialized.");
jbe@6	2462 moonbr_terminate_error();
jbe@6	2463 }
jbe@0	2464 lua_getglobal(L, "listen");
jbe@0	2465 lua_pushcfunction(L, moonbr_listen);
jbe@0	2466 if (lua_compare(L, -2, -1, LUA_OPEQ)) {
jbe@0	2467 lua_pushnil(L);
jbe@0	2468 lua_setglobal(L, "listen");
jbe@0	2469 }
jbe@0	2470 lua_settop(L, 1);
jbe@56	2471 lua_gc(L, LUA_GCCOLLECT, 0); // collect garbage before forking later
jbe@0	2472 moonbr_run(L);
jbe@0	2473 }
jbe@0	2474 return 0;
jbe@0	2475 }
jbe@0	2476