xref: /dports/net/haproxy20/haproxy-2.0.26/src/haproxy.c

/*
 * HA-Proxy : High Availability-enabled HTTP/TCP proxy
 * Copyright 2000-2021 Willy Tarreau <willy@haproxy.org>.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 *
 * Please refer to RFC7230 - RFC7235 informations about HTTP protocol, and
 * RFC6265 for informations about cookies usage. More generally, the IETF HTTP
 * Working Group's web site should be consulted for protocol related changes :
 *
 *     http://ftp.ics.uci.edu/pub/ietf/http/
 *
 * Pending bugs (may be not fixed because never reproduced) :
 *   - solaris only : sometimes, an HTTP proxy with only a dispatch address causes
 *     the proxy to terminate (no core) if the client breaks the connection during
 *     the response. Seen on 1.1.8pre4, but never reproduced. May not be related to
 *     the snprintf() bug since requests were simple (GET / HTTP/1.0), but may be
 *     related to missing setsid() (fixed in 1.1.15)
 *   - a proxy with an invalid config will prevent the startup even if disabled.
 *
 * ChangeLog has moved to the CHANGELOG file.
 *
 */

#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <dirent.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/tcp.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>
#include <netdb.h>
#include <fcntl.h>
#include <errno.h>
#include <signal.h>
#include <stdarg.h>
#include <sys/resource.h>
#include <sys/wait.h>
#include <time.h>
#include <syslog.h>
#include <grp.h>
#ifdef USE_CPU_AFFINITY
#include <sched.h>
#if defined(__FreeBSD__) || defined(__DragonFly__)
#include <sys/param.h>
#ifdef __FreeBSD__
#include <sys/cpuset.h>
#endif
#include <pthread_np.h>
#endif
#endif

#if defined(USE_PRCTL)
#include <sys/prctl.h>
#endif

#ifdef DEBUG_FULL
#include <assert.h>
#endif
#if defined(USE_SYSTEMD)
#include <systemd/sd-daemon.h>
#endif

#include <import/sha1.h>

#include <common/base64.h>
#include <common/cfgparse.h>
#include <common/chunk.h>
#include <common/compat.h>
#include <common/config.h>
#include <common/defaults.h>
#include <common/errors.h>
#include <common/initcall.h>
#include <common/memory.h>
#include <common/mini-clist.h>
#include <common/namespace.h>
#include <common/net_helper.h>
#include <common/openssl-compat.h>
#include <common/regex.h>
#include <common/standard.h>
#include <common/time.h>
#include <common/uri_auth.h>
#include <common/version.h>
#include <common/hathreads.h>

#include <types/capture.h>
#include <types/cli.h>
#include <types/filters.h>
#include <types/global.h>
#include <types/acl.h>
#include <types/peers.h>

#include <proto/acl.h>
#include <proto/activity.h>
#include <proto/arg.h>
#include <proto/auth.h>
#include <proto/backend.h>
#include <proto/channel.h>
#include <proto/checks.h>
#include <proto/cli.h>
#include <proto/connection.h>
#include <proto/fd.h>
#include <proto/filters.h>
#include <proto/hdr_idx.h>
#include <proto/hlua.h>
#include <proto/http_rules.h>
#include <proto/listener.h>
#include <proto/log.h>
#include <proto/mworker.h>
#include <proto/pattern.h>
#include <proto/protocol.h>
#include <proto/proto_http.h>
#include <proto/proxy.h>
#include <proto/queue.h>
#include <proto/server.h>
#include <proto/session.h>
#include <proto/stream.h>
#include <proto/signal.h>
#include <proto/task.h>
#include <proto/dns.h>
#include <proto/vars.h>
#include <proto/ssl_sock.h>

/* array of init calls for older platforms */
DECLARE_INIT_STAGES;

/* list of config files */
static struct list cfg_cfgfiles = LIST_HEAD_INIT(cfg_cfgfiles);
int  pid;			/* current process id */
int  relative_pid = 1;		/* process id starting at 1 */
unsigned long pid_bit = 1;      /* bit corresponding to the process id */
unsigned long all_proc_mask = 1; /* mask of all processes */

volatile unsigned long sleeping_thread_mask = 0; /* Threads that are about to sleep in poll() */
volatile unsigned long stopping_thread_mask = 0; /* Threads acknowledged stopping */

/* global options */
struct global global = {
	.hard_stop_after = TICK_ETERNITY,
	.nbproc = 1,
	.nbthread = 0,
	.req_count = 0,
	.logsrvs = LIST_HEAD_INIT(global.logsrvs),
	.maxzlibmem = 0,
	.comp_rate_lim = 0,
	.ssl_server_verify = SSL_SERVER_VERIFY_REQUIRED,
	.unix_bind = {
		 .ux = {
			 .uid = -1,
			 .gid = -1,
			 .mode = 0,
		 }
	},
	.tune = {
		.options = GTUNE_LISTENER_MQ,
		.bufsize = (BUFSIZE + 2*sizeof(void *) - 1) & -(2*sizeof(void *)),
		.maxrewrite = -1,
		.chksize = (BUFSIZE + 2*sizeof(void *) - 1) & -(2*sizeof(void *)),
		.reserved_bufs = RESERVED_BUFS,
		.pattern_cache = DEFAULT_PAT_LRU_SIZE,
		.pool_low_ratio  = 20,
		.pool_high_ratio = 25,
#ifdef USE_OPENSSL
		.sslcachesize = SSLCACHESIZE,
#endif
		.comp_maxlevel = 1,
#ifdef DEFAULT_IDLE_TIMER
		.idle_timer = DEFAULT_IDLE_TIMER,
#else
		.idle_timer = 1000, /* 1 second */
#endif
	},
#ifdef USE_OPENSSL
#ifdef DEFAULT_MAXSSLCONN
	.maxsslconn = DEFAULT_MAXSSLCONN,
#endif
#endif
	/* others NULL OK */
};

/*********************************************************************/

int stopping;	/* non zero means stopping in progress */
int killed;	/* non zero means a hard-stop is triggered */
int jobs = 0;   /* number of active jobs (conns, listeners, active tasks, ...) */
int unstoppable_jobs = 0;  /* number of active jobs that can't be stopped during a soft stop */
int active_peers = 0; /* number of active peers (connection attempts and connected) */
int connected_peers = 0; /* number of connected peers (verified ones) */

/* Here we store informations about the pids of the processes we may pause
 * or kill. We will send them a signal every 10 ms until we can bind to all
 * our ports. With 200 retries, that's about 2 seconds.
 */
#define MAX_START_RETRIES	200
static int *oldpids = NULL;
static int oldpids_sig; /* use USR1 or TERM */

/* Path to the unix socket we use to retrieve listener sockets from the old process */
static const char *old_unixsocket;

static char *cur_unixsocket = NULL;

int atexit_flag = 0;

int nb_oldpids = 0;
const int zero = 0;
const int one = 1;
const struct linger nolinger = { .l_onoff = 1, .l_linger = 0 };

char hostname[MAX_HOSTNAME_LEN];
char localpeer[MAX_HOSTNAME_LEN];

/* used from everywhere just to drain results we don't want to read and which
 * recent versions of gcc increasingly and annoyingly complain about.
 */
int shut_your_big_mouth_gcc_int = 0;

static char **old_argv = NULL; /* previous argv but cleaned up */

struct list proc_list = LIST_HEAD_INIT(proc_list);

int master = 0; /* 1 if in master, 0 if in child */
unsigned int rlim_fd_cur_at_boot = 0;
unsigned int rlim_fd_max_at_boot = 0;

/* per-boot randomness */
unsigned char boot_seed[20];        /* per-boot random seed (160 bits initially) */

struct mworker_proc *proc_self = NULL;

/* list of the temporarily limited listeners because of lack of resource */
struct list global_listener_queue = LIST_HEAD_INIT(global_listener_queue);
struct task *global_listener_queue_task;
static struct task *manage_global_listener_queue(struct task *t, void *context, unsigned short state);

static void *run_thread_poll_loop(void *data);

/* bitfield of a few warnings to emit just once (WARN_*) */
unsigned int warned = 0;

/* master CLI configuration (-S flag) */
struct list mworker_cli_conf = LIST_HEAD_INIT(mworker_cli_conf);

/* These are strings to be reported in the output of "haproxy -vv". They may
 * either be constants (in which case must_free must be zero) or dynamically
 * allocated strings to pass to free() on exit, and in this case must_free
 * must be non-zero.
 */
struct list build_opts_list = LIST_HEAD_INIT(build_opts_list);
struct build_opts_str {
	struct list list;
	const char *str;
	int must_free;
};

/* These functions are called just after the point where the program exits
 * after a config validity check, so they are generally suited for resource
 * allocation and slow initializations that should be skipped during basic
 * config checks. The functions must return 0 on success, or a combination
 * of ERR_* flags (ERR_WARN, ERR_ABORT, ERR_FATAL, ...). The 2 latter cause
 * and immediate exit, so the function must have emitted any useful error.
 */
struct list post_check_list = LIST_HEAD_INIT(post_check_list);
struct post_check_fct {
	struct list list;
	int (*fct)();
};

/* These functions are called for each thread just after the thread creation
 * and before running the init functions. They should be used to do per-thread
 * (re-)allocations that are needed by subsequent functoins. They must return 0
 * if an error occurred. */
struct list per_thread_alloc_list = LIST_HEAD_INIT(per_thread_alloc_list);
struct per_thread_alloc_fct {
	struct list list;
	int (*fct)();
};

/* These functions are called for each thread just after the thread creation
 * and before running the scheduler. They should be used to do per-thread
 * initializations. They must return 0 if an error occurred. */
struct list per_thread_init_list = LIST_HEAD_INIT(per_thread_init_list);
struct per_thread_init_fct {
	struct list list;
	int (*fct)();
};

/* These functions are called when freeing the global sections at the end of
 * deinit, after everything is stopped. They don't return anything. They should
 * not release shared resources that are possibly used by other deinit
 * functions, only close/release what is private. Use the per_thread_free_list
 * to release shared resources.
 */
struct list post_deinit_list = LIST_HEAD_INIT(post_deinit_list);
struct post_deinit_fct {
	struct list list;
	void (*fct)();
};

/* These functions are called when freeing the global sections at the end of
 * deinit, after the thread deinit functions, to release unneeded memory
 * allocations. They don't return anything, and they work in best effort mode
 * as their sole goal is to make valgrind mostly happy.
 */
struct list per_thread_free_list = LIST_HEAD_INIT(per_thread_free_list);
struct per_thread_free_fct {
	struct list list;
	int (*fct)();
};

/* These functions are called for each thread just after the scheduler loop and
 * before exiting the thread. They don't return anything and, as for post-deinit
 * functions, they work in best effort mode as their sole goal is to make
 * valgrind mostly happy. */
struct list per_thread_deinit_list = LIST_HEAD_INIT(per_thread_deinit_list);
struct per_thread_deinit_fct {
	struct list list;
	void (*fct)();
};

/*********************************************************************/
/*  general purpose functions  ***************************************/
/*********************************************************************/

/* used to register some build option strings at boot. Set must_free to
 * non-zero if the string must be freed upon exit.
 */
void hap_register_build_opts(const char *str, int must_free)
{
	struct build_opts_str *b;

	b = calloc(1, sizeof(*b));
	if (!b) {
		fprintf(stderr, "out of memory\n");
		exit(1);
	}
	b->str = str;
	b->must_free = must_free;
	LIST_ADDQ(&build_opts_list, &b->list);
}

/* used to register some initialization functions to call after the checks. */
void hap_register_post_check(int (*fct)())
{
	struct post_check_fct *b;

	b = calloc(1, sizeof(*b));
	if (!b) {
		fprintf(stderr, "out of memory\n");
		exit(1);
	}
	b->fct = fct;
	LIST_ADDQ(&post_check_list, &b->list);
}

/* used to register some de-initialization functions to call after everything
 * has stopped.
 */
void hap_register_post_deinit(void (*fct)())
{
	struct post_deinit_fct *b;

	b = calloc(1, sizeof(*b));
	if (!b) {
		fprintf(stderr, "out of memory\n");
		exit(1);
	}
	b->fct = fct;
	LIST_ADDQ(&post_deinit_list, &b->list);
}

/* used to register some allocation functions to call for each thread. */
void hap_register_per_thread_alloc(int (*fct)())
{
	struct per_thread_alloc_fct *b;

	b = calloc(1, sizeof(*b));
	if (!b) {
		fprintf(stderr, "out of memory\n");
		exit(1);
	}
	b->fct = fct;
	LIST_ADDQ(&per_thread_alloc_list, &b->list);
}

/* used to register some initialization functions to call for each thread. */
void hap_register_per_thread_init(int (*fct)())
{
	struct per_thread_init_fct *b;

	b = calloc(1, sizeof(*b));
	if (!b) {
		fprintf(stderr, "out of memory\n");
		exit(1);
	}
	b->fct = fct;
	LIST_ADDQ(&per_thread_init_list, &b->list);
}

/* used to register some de-initialization functions to call for each thread. */
void hap_register_per_thread_deinit(void (*fct)())
{
	struct per_thread_deinit_fct *b;

	b = calloc(1, sizeof(*b));
	if (!b) {
		fprintf(stderr, "out of memory\n");
		exit(1);
	}
	b->fct = fct;
	LIST_ADDQ(&per_thread_deinit_list, &b->list);
}

/* used to register some free functions to call for each thread. */
void hap_register_per_thread_free(int (*fct)())
{
	struct per_thread_free_fct *b;

	b = calloc(1, sizeof(*b));
	if (!b) {
		fprintf(stderr, "out of memory\n");
		exit(1);
	}
	b->fct = fct;
	LIST_ADDQ(&per_thread_free_list, &b->list);
}

static void display_version()
{
	printf("HA-Proxy version %s %s - https://haproxy.org/\n", haproxy_version, haproxy_date);
}

static void display_build_opts()
{
	struct build_opts_str *item;

	printf("Build options :"
#ifdef BUILD_TARGET
	       "\n  TARGET  = " BUILD_TARGET
#endif
#ifdef BUILD_CPU
	       "\n  CPU     = " BUILD_CPU
#endif
#ifdef BUILD_CC
	       "\n  CC      = " BUILD_CC
#endif
#ifdef BUILD_CFLAGS
	       "\n  CFLAGS  = " BUILD_CFLAGS
#endif
#ifdef BUILD_OPTIONS
	       "\n  OPTIONS = " BUILD_OPTIONS
#endif
#ifdef BUILD_FEATURES
	       "\n\nFeature list : " BUILD_FEATURES
#endif
	       "\n\nDefault settings :"
	       "\n  bufsize = %d, maxrewrite = %d, maxpollevents = %d"
	       "\n\n",
	       BUFSIZE, MAXREWRITE, MAX_POLL_EVENTS);

	list_for_each_entry(item, &build_opts_list, list) {
		puts(item->str);
	}

	putchar('\n');

	list_pollers(stdout);
	putchar('\n');
	list_mux_proto(stdout);
	putchar('\n');
	list_services(stdout);
	putchar('\n');
	list_filters(stdout);
	putchar('\n');
}

/*
 * This function prints the command line usage and exits
 */
static void usage(char *name)
{
	display_version();
	fprintf(stderr,
		"Usage : %s [-f <cfgfile|cfgdir>]* [ -vdV"
		"D ] [ -n <maxconn> ] [ -N <maxpconn> ]\n"
		"        [ -p <pidfile> ] [ -m <max megs> ] [ -C <dir> ] [-- <cfgfile>*]\n"
		"        -v displays version ; -vv shows known build options.\n"
		"        -d enters debug mode ; -db only disables background mode.\n"
		"        -dM[<byte>] poisons memory with <byte> (defaults to 0x50)\n"
		"        -V enters verbose mode (disables quiet mode)\n"
		"        -D goes daemon ; -C changes to <dir> before loading files.\n"
		"        -W master-worker mode.\n"
#if defined(USE_SYSTEMD)
		"        -Ws master-worker mode with systemd notify support.\n"
#endif
		"        -q quiet mode : don't display messages\n"
		"        -c check mode : only check config files and exit\n"
		"        -n sets the maximum total # of connections (uses ulimit -n)\n"
		"        -m limits the usable amount of memory (in MB)\n"
		"        -N sets the default, per-proxy maximum # of connections (%d)\n"
		"        -L set local peer name (default to hostname)\n"
		"        -p writes pids of all children to this file\n"
#if defined(USE_EPOLL)
		"        -de disables epoll() usage even when available\n"
#endif
#if defined(USE_KQUEUE)
		"        -dk disables kqueue() usage even when available\n"
#endif
#if defined(USE_EVPORTS)
		"        -dv disables event ports usage even when available\n"
#endif
#if defined(USE_POLL)
		"        -dp disables poll() usage even when available\n"
#endif
#if defined(USE_LINUX_SPLICE)
		"        -dS disables splice usage (broken on old kernels)\n"
#endif
#if defined(USE_GETADDRINFO)
		"        -dG disables getaddrinfo() usage\n"
#endif
#if defined(SO_REUSEPORT)
		"        -dR disables SO_REUSEPORT usage\n"
#endif
		"        -dr ignores server address resolution failures\n"
		"        -dV disables SSL verify on servers side\n"
		"        -sf/-st [pid ]* finishes/terminates old pids.\n"
		"        -x <unix_socket> get listening sockets from a unix socket\n"
		"        -S <bind>[,<bind options>...] new master CLI\n"
		"\n",
		name, cfg_maxpconn);
	exit(1);
}



/*********************************************************************/
/*   more specific functions   ***************************************/
/*********************************************************************/

/* sends the signal <sig> to all pids found in <oldpids>. Returns the number of
 * pids the signal was correctly delivered to.
 */
int tell_old_pids(int sig)
{
	int p;
	int ret = 0;
	for (p = 0; p < nb_oldpids; p++)
		if (kill(oldpids[p], sig) == 0)
			ret++;
	return ret;
}

/*
 * remove a pid forom the olpid array and decrease nb_oldpids
 * return 1 pid was found otherwise return 0
 */

int delete_oldpid(int pid)
{
	int i;

	for (i = 0; i < nb_oldpids; i++) {
		if (oldpids[i] == pid) {
			oldpids[i] = oldpids[nb_oldpids - 1];
			oldpids[nb_oldpids - 1] = 0;
			nb_oldpids--;
			return 1;
		}
	}
	return 0;
}


static void get_cur_unixsocket()
{
	/* if -x was used, try to update the stat socket if not available anymore */
	if (global.stats_fe) {
		struct bind_conf *bind_conf;

		/* pass through all stats socket */
		list_for_each_entry(bind_conf, &global.stats_fe->conf.bind, by_fe) {
			struct listener *l;

			list_for_each_entry(l, &bind_conf->listeners, by_bind) {

				if (l->addr.ss_family == AF_UNIX &&
				    (bind_conf->level & ACCESS_FD_LISTENERS)) {
					const struct sockaddr_un *un;

					un = (struct sockaddr_un *)&l->addr;
					/* priority to old_unixsocket */
					if (!cur_unixsocket) {
						cur_unixsocket = strdup(un->sun_path);
					} else {
						if (old_unixsocket && !strcmp(un->sun_path, old_unixsocket)) {
							free(cur_unixsocket);
							cur_unixsocket = strdup(old_unixsocket);
							return;
						}
					}
				}
			}
		}
	}
	if (!cur_unixsocket && old_unixsocket)
		cur_unixsocket = strdup(old_unixsocket);
}

/*
 * When called, this function reexec haproxy with -sf followed by current
 * children PIDs and possibly old children PIDs if they didn't leave yet.
 */
void mworker_reload()
{
	char **next_argv = NULL;
	int old_argc = 0; /* previous number of argument */
	int next_argc = 0;
	int i = 0;
	char *msg = NULL;
	struct rlimit limit;
	struct per_thread_deinit_fct *ptdf;

	mworker_block_signals();
#if defined(USE_SYSTEMD)
	if (global.tune.options & GTUNE_USE_SYSTEMD)
		sd_notify(0, "RELOADING=1");
#endif
	setenv("HAPROXY_MWORKER_REEXEC", "1", 1);

	mworker_proc_list_to_env(); /* put the children description in the env */

	/* during the reload we must ensure that every FDs that can't be
	 * reuse (ie those that are not referenced in the proc_list)
	 * are closed or they will leak. */

	/* close the listeners FD */
	mworker_cli_proxy_stop();

	if (getenv("HAPROXY_MWORKER_WAIT_ONLY") == NULL) {
		/* close the poller FD and the thread waker pipe FD */
		list_for_each_entry(ptdf, &per_thread_deinit_list, list)
			ptdf->fct();
		if (fdtab)
			deinit_pollers();
	}
#if defined(USE_OPENSSL) && (HA_OPENSSL_VERSION_NUMBER >= 0x10101000L)
	/* close random device FDs */
	RAND_keep_random_devices_open(0);
#endif

	/* restore the initial FD limits */
	limit.rlim_cur = rlim_fd_cur_at_boot;
	limit.rlim_max = rlim_fd_max_at_boot;
	if (setrlimit(RLIMIT_NOFILE, &limit) == -1) {
		getrlimit(RLIMIT_NOFILE, &limit);
		ha_warning("Failed to restore initial FD limits (cur=%u max=%u), using cur=%u max=%u\n",
			   rlim_fd_cur_at_boot, rlim_fd_max_at_boot,
			   (unsigned int)limit.rlim_cur, (unsigned int)limit.rlim_max);
	}

	/* compute length  */
	while (old_argv[old_argc])
		old_argc++;

	/* 1 for haproxy -sf, 2 for -x /socket */
	next_argv = calloc(old_argc + 1 + 2 + mworker_child_nb() + 1, sizeof(char *));
	if (next_argv == NULL)
		goto alloc_error;

	/* copy the program name */
	next_argv[next_argc++] = old_argv[0];

	/* insert the new options just after argv[0] in case we have a -- */

	/* add -sf <PID>*  to argv */
	if (mworker_child_nb() > 0) {
		struct mworker_proc *child;

		next_argv[next_argc++] = "-sf";

		list_for_each_entry(child, &proc_list, list) {
			if (!(child->options & (PROC_O_TYPE_WORKER|PROC_O_TYPE_PROG)) || child->pid <= -1 )
				continue;
			if ((next_argv[next_argc++] = memprintf(&msg, "%d", child->pid)) == NULL)
				goto alloc_error;
			msg = NULL;
		}
	}
	/* add the -x option with the stat socket */
	if (cur_unixsocket) {
		next_argv[next_argc++] = "-x";
		next_argv[next_argc++] = (char *)cur_unixsocket;
	}

	/* copy the previous options */
	for (i = 1; i < old_argc; i++)
		next_argv[next_argc++] = old_argv[i];

	ha_warning("Reexecuting Master process\n");
	signal(SIGPROF, SIG_IGN);
	execvp(next_argv[0], next_argv);

	ha_warning("Failed to reexecute the master process [%d]: %s\n", pid, strerror(errno));
	free(next_argv);
	next_argv = NULL;
	return;

alloc_error:
	free(next_argv);
	next_argv = NULL;
	ha_warning("Failed to reexecute the master process [%d]: Cannot allocate memory\n", pid);
	return;
}

static void mworker_loop()
{

#if defined(USE_SYSTEMD)
	if (global.tune.options & GTUNE_USE_SYSTEMD)
		sd_notifyf(0, "READY=1\nMAINPID=%lu", (unsigned long)getpid());
#endif
	/* Busy polling makes no sense in the master :-) */
	global.tune.options &= ~GTUNE_BUSY_POLLING;

	master = 1;

	signal_unregister(SIGTTIN);
	signal_unregister(SIGTTOU);
	signal_unregister(SIGUSR1);
	signal_unregister(SIGHUP);
	signal_unregister(SIGQUIT);

	signal_register_fct(SIGTERM, mworker_catch_sigterm, SIGTERM);
	signal_register_fct(SIGUSR1, mworker_catch_sigterm, SIGUSR1);
	signal_register_fct(SIGTTIN, mworker_broadcast_signal, SIGTTIN);
	signal_register_fct(SIGTTOU, mworker_broadcast_signal, SIGTTOU);
	signal_register_fct(SIGINT, mworker_catch_sigterm, SIGINT);
	signal_register_fct(SIGHUP, mworker_catch_sighup, SIGHUP);
	signal_register_fct(SIGUSR2, mworker_catch_sighup, SIGUSR2);
	signal_register_fct(SIGCHLD, mworker_catch_sigchld, SIGCHLD);

	mworker_unblock_signals();
	mworker_cleanlisteners();
	mworker_cleantasks();

	mworker_catch_sigchld(NULL); /* ensure we clean the children in case
				     some SIGCHLD were lost */

	global.nbthread = 1;
	relative_pid = 1;
	pid_bit = 1;
	all_proc_mask = 1;

#ifdef USE_THREAD
	tid_bit = 1;
	all_threads_mask = 1;
#endif

	jobs++; /* this is the "master" job, we want to take care of the
		signals even if there is no listener so the poll loop don't
		leave */

	fork_poller();
	run_thread_poll_loop(0);
}

/*
 * Reexec the process in failure mode, instead of exiting
 */
void reexec_on_failure()
{
	if (!atexit_flag)
		return;

	setenv("HAPROXY_MWORKER_WAIT_ONLY", "1", 1);

	ha_warning("Reexecuting Master process in waitpid mode\n");
	mworker_reload();
}


/*
 * upon SIGUSR1, let's have a soft stop. Note that soft_stop() broadcasts
 * a signal zero to all subscribers. This means that it's as easy as
 * subscribing to signal 0 to get informed about an imminent shutdown.
 */
static void sig_soft_stop(struct sig_handler *sh)
{
	soft_stop();
	signal_unregister_handler(sh);
	pool_gc(NULL);
}

/*
 * upon SIGTTOU, we pause everything
 */
static void sig_pause(struct sig_handler *sh)
{
	pause_proxies();
	pool_gc(NULL);
}

/*
 * upon SIGTTIN, let's have a soft stop.
 */
static void sig_listen(struct sig_handler *sh)
{
	resume_proxies();
}

/*
 * this function dumps every server's state when the process receives SIGHUP.
 */
static void sig_dump_state(struct sig_handler *sh)
{
	struct proxy *p = proxies_list;

	ha_warning("SIGHUP received, dumping servers states.\n");
	while (p) {
		struct server *s = p->srv;

		send_log(p, LOG_NOTICE, "SIGHUP received, dumping servers states for proxy %s.\n", p->id);
		while (s) {
			chunk_printf(&trash,
			             "SIGHUP: Server %s/%s is %s. Conn: %d act, %d pend, %lld tot.",
			             p->id, s->id,
			             (s->cur_state != SRV_ST_STOPPED) ? "UP" : "DOWN",
			             s->cur_sess, s->nbpend, s->counters.cum_sess);
			ha_warning("%s\n", trash.area);
			send_log(p, LOG_NOTICE, "%s\n", trash.area);
			s = s->next;
		}

		/* FIXME: those info are a bit outdated. We should be able to distinguish between FE and BE. */
		if (!p->srv) {
			chunk_printf(&trash,
			             "SIGHUP: Proxy %s has no servers. Conn: act(FE+BE): %d+%d, %d pend (%d unass), tot(FE+BE): %lld+%lld.",
			             p->id,
			             p->feconn, p->beconn, p->totpend, p->nbpend, p->fe_counters.cum_conn, p->be_counters.cum_conn);
		} else if (p->srv_act == 0) {
			chunk_printf(&trash,
			             "SIGHUP: Proxy %s %s ! Conn: act(FE+BE): %d+%d, %d pend (%d unass), tot(FE+BE): %lld+%lld.",
			             p->id,
			             (p->srv_bck) ? "is running on backup servers" : "has no server available",
			             p->feconn, p->beconn, p->totpend, p->nbpend, p->fe_counters.cum_conn, p->be_counters.cum_conn);
		} else {
			chunk_printf(&trash,
			             "SIGHUP: Proxy %s has %d active servers and %d backup servers available."
			             " Conn: act(FE+BE): %d+%d, %d pend (%d unass), tot(FE+BE): %lld+%lld.",
			             p->id, p->srv_act, p->srv_bck,
			             p->feconn, p->beconn, p->totpend, p->nbpend, p->fe_counters.cum_conn, p->be_counters.cum_conn);
		}
		ha_warning("%s\n", trash.area);
		send_log(p, LOG_NOTICE, "%s\n", trash.area);

		p = p->next;
	}
}

static void dump(struct sig_handler *sh)
{
	/* dump memory usage then free everything possible */
	dump_pools();
	pool_gc(NULL);
}

/*
 *  This function dup2 the stdio FDs (0,1,2) with <fd>, then closes <fd>
 *  If <fd> < 0, it opens /dev/null and use it to dup
 *
 *  In the case of chrooting, you have to open /dev/null before the chroot, and
 *  pass the <fd> to this function
 */
static void stdio_quiet(int fd)
{
	if (fd < 0)
		fd = open("/dev/null", O_RDWR, 0);

	if (fd > -1) {
		fclose(stdin);
		fclose(stdout);
		fclose(stderr);

		dup2(fd, 0);
		dup2(fd, 1);
		dup2(fd, 2);
		if (fd > 2)
			close(fd);
		return;
	}

	ha_alert("Cannot open /dev/null\n");
	exit(EXIT_FAILURE);
}


/* This function checks if cfg_cfgfiles contains directories.
 * If it finds one, it adds all the files (and only files) it contains
 * in cfg_cfgfiles in place of the directory (and removes the directory).
 * It adds the files in lexical order.
 * It adds only files with .cfg extension.
 * It doesn't add files with name starting with '.'
 */
static void cfgfiles_expand_directories(void)
{
	struct wordlist *wl, *wlb;
	char *err = NULL;

	list_for_each_entry_safe(wl, wlb, &cfg_cfgfiles, list) {
		struct stat file_stat;
		struct dirent **dir_entries = NULL;
		int dir_entries_nb;
		int dir_entries_it;

		if (stat(wl->s, &file_stat)) {
			ha_alert("Cannot open configuration file/directory %s : %s\n",
				 wl->s,
				 strerror(errno));
			exit(1);
		}

		if (!S_ISDIR(file_stat.st_mode))
			continue;

		/* from this point wl->s is a directory */

		dir_entries_nb = scandir(wl->s, &dir_entries, NULL, alphasort);
		if (dir_entries_nb < 0) {
			ha_alert("Cannot open configuration directory %s : %s\n",
				 wl->s,
				 strerror(errno));
			exit(1);
		}

		/* for each element in the directory wl->s */
		for (dir_entries_it = 0; dir_entries_it < dir_entries_nb; dir_entries_it++) {
			struct dirent *dir_entry = dir_entries[dir_entries_it];
			char *filename = NULL;
			char *d_name_cfgext = strstr(dir_entry->d_name, ".cfg");

			/* don't add filename that begin with .
			 * only add filename with .cfg extension
			 */
			if (dir_entry->d_name[0] == '.' ||
			    !(d_name_cfgext && d_name_cfgext[4] == '\0'))
				goto next_dir_entry;

			if (!memprintf(&filename, "%s/%s", wl->s, dir_entry->d_name)) {
				ha_alert("Cannot load configuration files %s : out of memory.\n",
					 filename);
				exit(1);
			}

			if (stat(filename, &file_stat)) {
				ha_alert("Cannot open configuration file %s : %s\n",
					 wl->s,
					 strerror(errno));
				exit(1);
			}

			/* don't add anything else than regular file in cfg_cfgfiles
			 * this way we avoid loops
			 */
			if (!S_ISREG(file_stat.st_mode))
				goto next_dir_entry;

			if (!list_append_word(&wl->list, filename, &err)) {
				ha_alert("Cannot load configuration files %s : %s\n",
					 filename,
					 err);
				exit(1);
			}

next_dir_entry:
			free(filename);
			free(dir_entry);
		}

		free(dir_entries);

		/* remove the current directory (wl) from cfg_cfgfiles */
		free(wl->s);
		LIST_DEL(&wl->list);
		free(wl);
	}

	free(err);
}

/* Retrieves old sockets from worker process running the CLI at address
 * <unixsocket>. Fills xfer_sock_list with what is found. Returns 0 on
 * success, -1 on failure.
 */
static int get_old_sockets(const char *unixsocket)
{
	char *cmsgbuf = NULL, *tmpbuf = NULL;
	int *tmpfd = NULL;
	struct sockaddr_un addr;
	struct cmsghdr *cmsg;
	struct msghdr msghdr;
	struct iovec iov;
	struct xfer_sock_list *xfer_sock = NULL;
	struct timeval tv = { .tv_sec = 1, .tv_usec = 0 };
	int sock = -1;
	int ret = -1;
	int ret2 = -1;
	int fd_nb;
	int got_fd = 0;
	int i = 0;
	size_t maxoff = 0, curoff = 0;

	memset(&msghdr, 0, sizeof(msghdr));
	cmsgbuf = malloc(CMSG_SPACE(sizeof(int)) * MAX_SEND_FD);
	if (!cmsgbuf) {
		ha_warning("Failed to allocate memory to send sockets\n");
		goto out;
	}
	sock = socket(PF_UNIX, SOCK_STREAM, 0);
	if (sock < 0) {
		ha_warning("Failed to connect to the old process socket '%s'\n",
			   unixsocket);
		goto out;
	}
	strncpy(addr.sun_path, unixsocket, sizeof(addr.sun_path) - 1);
	addr.sun_path[sizeof(addr.sun_path) - 1] = 0;
	addr.sun_family = PF_UNIX;
	ret = connect(sock, (struct sockaddr *)&addr, sizeof(addr));
	if (ret < 0) {
		ha_warning("Failed to connect to the old process socket '%s'\n",
			   unixsocket);
		goto out;
	}
	setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, (void *)&tv, sizeof(tv));
	iov.iov_base = &fd_nb;
	iov.iov_len = sizeof(fd_nb);
	msghdr.msg_iov = &iov;
	msghdr.msg_iovlen = 1;
	send(sock, "_getsocks\n", strlen("_getsocks\n"), 0);
	/* First, get the number of file descriptors to be received */
	if (recvmsg(sock, &msghdr, MSG_WAITALL) != sizeof(fd_nb)) {
		ha_warning("Failed to get the number of sockets to be transferred !\n");
		goto out;
	}
	if (fd_nb == 0) {
		ret2 = 0;
		goto out;
	}
	tmpbuf = malloc(fd_nb * (1 + MAXPATHLEN + 1 + IFNAMSIZ + sizeof(int)));
	if (tmpbuf == NULL) {
		ha_warning("Failed to allocate memory while receiving sockets\n");
		goto out;
	}
	tmpfd = malloc(fd_nb * sizeof(int));
	if (tmpfd == NULL) {
		ha_warning("Failed to allocate memory while receiving sockets\n");
		goto out;
	}
	msghdr.msg_control = cmsgbuf;
	msghdr.msg_controllen = CMSG_SPACE(sizeof(int)) * MAX_SEND_FD;
	iov.iov_len = MAX_SEND_FD * (1 + MAXPATHLEN + 1 + IFNAMSIZ + sizeof(int));
	do {
		int ret3;

		iov.iov_base = tmpbuf + curoff;
		ret = recvmsg(sock, &msghdr, 0);
		if (ret == -1 && errno == EINTR)
			continue;
		if (ret <= 0)
			break;
		/* Send an ack to let the sender know we got the sockets
		 * and it can send some more
		 */
		do {
			ret3 = send(sock, &got_fd, sizeof(got_fd), 0);
		} while (ret3 == -1 && errno == EINTR);
		for (cmsg = CMSG_FIRSTHDR(&msghdr); cmsg != NULL;
		    cmsg = CMSG_NXTHDR(&msghdr, cmsg)) {
			if (cmsg->cmsg_level == SOL_SOCKET &&
			    cmsg->cmsg_type == SCM_RIGHTS) {
				size_t totlen = cmsg->cmsg_len -
				    CMSG_LEN(0);
				if (totlen / sizeof(int) + got_fd > fd_nb) {
					ha_warning("Got to many sockets !\n");
					goto out;
				}
				/*
				 * Be paranoid and use memcpy() to avoid any
				 * potential alignement issue.
				 */
				memcpy(&tmpfd[got_fd], CMSG_DATA(cmsg), totlen);
				got_fd += totlen / sizeof(int);
			}
		}
		curoff += ret;
	} while (got_fd < fd_nb);

	if (got_fd != fd_nb) {
		ha_warning("We didn't get the expected number of sockets (expecting %d got %d)\n",
			   fd_nb, got_fd);
		goto out;
	}
	maxoff = curoff;
	curoff = 0;
	for (i = 0; i < got_fd; i++) {
		int fd = tmpfd[i];
		socklen_t socklen;
		int len;

		xfer_sock = calloc(1, sizeof(*xfer_sock));
		if (!xfer_sock) {
			ha_warning("Failed to allocate memory in get_old_sockets() !\n");
			break;
		}
		xfer_sock->fd = -1;

		socklen = sizeof(xfer_sock->addr);
		if (getsockname(fd, (struct sockaddr *)&xfer_sock->addr, &socklen) != 0) {
			ha_warning("Failed to get socket address\n");
			free(xfer_sock);
			xfer_sock = NULL;
			continue;
		}
		if (curoff >= maxoff) {
			ha_warning("Inconsistency while transferring sockets\n");
			goto out;
		}
		len = tmpbuf[curoff++];
		if (len > 0) {
			/* We have a namespace */
			if (curoff + len > maxoff) {
				ha_warning("Inconsistency while transferring sockets\n");
				goto out;
			}
			xfer_sock->namespace = malloc(len + 1);
			if (!xfer_sock->namespace) {
				ha_warning("Failed to allocate memory while transferring sockets\n");
				goto out;
			}
			memcpy(xfer_sock->namespace, &tmpbuf[curoff], len);
			xfer_sock->namespace[len] = 0;
			curoff += len;
		}
		if (curoff >= maxoff) {
			ha_warning("Inconsistency while transferring sockets\n");
			goto out;
		}
		len = tmpbuf[curoff++];
		if (len > 0) {
			/* We have an interface */
			if (curoff + len > maxoff) {
				ha_warning("Inconsistency while transferring sockets\n");
				goto out;
			}
			xfer_sock->iface = malloc(len + 1);
			if (!xfer_sock->iface) {
				ha_warning("Failed to allocate memory while transferring sockets\n");
				goto out;
			}
			memcpy(xfer_sock->iface, &tmpbuf[curoff], len);
			xfer_sock->iface[len] = 0;
			curoff += len;
		}
		if (curoff + sizeof(int) > maxoff) {
			ha_warning("Inconsistency while transferring sockets\n");
			goto out;
		}
		memcpy(&xfer_sock->options, &tmpbuf[curoff],
		    sizeof(xfer_sock->options));
		curoff += sizeof(xfer_sock->options);

		xfer_sock->fd = fd;
		if (xfer_sock_list)
			xfer_sock_list->prev = xfer_sock;
		xfer_sock->next = xfer_sock_list;
		xfer_sock->prev = NULL;
		xfer_sock_list = xfer_sock;
		xfer_sock = NULL;
	}

	ret2 = 0;
out:
	/* If we failed midway make sure to close the remaining
	 * file descriptors
	 */
	if (tmpfd != NULL && i < got_fd) {
		for (; i < got_fd; i++) {
			close(tmpfd[i]);
		}
	}
	free(tmpbuf);
	free(tmpfd);
	free(cmsgbuf);
	if (sock != -1)
		close(sock);
	if (xfer_sock) {
		free(xfer_sock->namespace);
		free(xfer_sock->iface);
		if (xfer_sock->fd != -1)
			close(xfer_sock->fd);
		free(xfer_sock);
	}
	return (ret2);
}

/*
 * copy and cleanup the current argv
 * Remove the -sf /-st / -x parameters
 * Return an allocated copy of argv
 */

static char **copy_argv(int argc, char **argv)
{
	char **newargv, **retargv;

	newargv = calloc(argc + 2, sizeof(char *));
	if (newargv == NULL) {
		ha_warning("Cannot allocate memory\n");
		return NULL;
	}
	retargv = newargv;

	/* first copy argv[0] */
	*newargv++ = *argv++;
	argc--;

	while (argc > 0) {
		if (**argv != '-') {
			/* non options are copied but will fail in the argument parser */
			*newargv++ = *argv++;
			argc--;

		} else  {
			char *flag;

			flag = *argv + 1;

			if (flag[0] == '-' && flag[1] == 0) {
				/* "--\0" copy every arguments till the end of argv */
				*newargv++ = *argv++;
				argc--;

				while (argc > 0) {
					*newargv++ = *argv++;
					argc--;
				}
			} else {
				switch (*flag) {
					case 's':
						/* -sf / -st and their parameters are ignored */
						if (flag[1] == 'f' || flag[1] == 't') {
							argc--;
							argv++;
							/* The list can't contain a negative value since the only
							way to know the end of this list is by looking for the
							next option or the end of the options */
							while (argc > 0 && argv[0][0] != '-') {
								argc--;
								argv++;
							}
						} else {
							argc--;
							argv++;

						}
						break;

					case 'x':
						/* this option and its parameter are ignored */
						argc--;
						argv++;
						if (argc > 0) {
							argc--;
							argv++;
						}
						break;

					case 'C':
					case 'n':
					case 'm':
					case 'N':
					case 'L':
					case 'f':
					case 'p':
					case 'S':
						/* these options have only 1 parameter which must be copied and can start with a '-' */
						*newargv++ = *argv++;
						argc--;
						if (argc == 0)
							goto error;
						*newargv++ = *argv++;
						argc--;
						break;
					default:
						/* for other options just copy them without parameters, this is also done
						 * for options like "--foo", but this  will fail in the argument parser.
						 * */
						*newargv++ = *argv++;
						argc--;
						break;
				}
			}
		}
	}

	return retargv;

error:
	free(retargv);
	return NULL;
}


/* Performs basic random seed initialization. The main issue with this is that
 * srandom_r() only takes 32 bits and purposely provides a reproducible sequence,
 * which means that there will only be 4 billion possible random sequences once
 * srandom() is called, regardless of the internal state. Not calling it is
 * even worse as we'll always produce the same randoms sequences. What we do
 * here is to create an initial sequence from various entropy sources, hash it
 * using SHA1 and keep the resulting 160 bits available globally.
 *
 * We initialize the current process with the first 32 bits before starting the
 * polling loop, where all this will be changed to have process specific and
 * thread specific sequences.
 *
 * Before starting threads, it's still possible to call random() as srandom()
 * is initialized from this, but after threads and/or processes are started,
 * only ha_random() is expected to be used to guarantee distinct sequences.
 */
static void ha_random_boot(char *const *argv)
{
	unsigned char message[256];
	unsigned char *m = message;
	struct timeval tv;
	blk_SHA_CTX ctx;
	unsigned long l;
	int fd;
	int i;

	/* start with current time as pseudo-random seed */
	gettimeofday(&tv, NULL);
	write_u32(m, tv.tv_sec);  m += 4;
	write_u32(m, tv.tv_usec); m += 4;

	/* PID and PPID add some OS-based randomness */
	write_u16(m, getpid());   m += 2;
	write_u16(m, getppid());  m += 2;

	/* take up to 160 bits bytes from /dev/urandom if available (non-blocking) */
	fd = open("/dev/urandom", O_RDONLY);
	if (fd >= 0) {
		i = read(fd, m, 20);
		if (i > 0)
			m += i;
		close(fd);
	}

	/* take up to 160 bits bytes from openssl (non-blocking) */
#ifdef USE_OPENSSL
	if (RAND_bytes(m, 20) == 1)
		m += 20;
#endif

	/* take 160 bits from existing random in case it was already initialized */
	for (i = 0; i < 5; i++) {
		write_u32(m, random());
		m += 4;
	}

	/* stack address (benefit form operating system's ASLR) */
	l = (unsigned long)&m;
	memcpy(m, &l, sizeof(l)); m += sizeof(l);

	/* argv address (benefit form operating system's ASLR) */
	l = (unsigned long)&argv;
	memcpy(m, &l, sizeof(l)); m += sizeof(l);

	/* use tv_usec again after all the operations above */
	gettimeofday(&tv, NULL);
	write_u32(m, tv.tv_usec); m += 4;

	/*
	 * At this point, ~84-92 bytes have been used
	 */

	/* finish with the hostname */
	strncpy((char *)m, hostname, message + sizeof(message) - m);
	m += strlen(hostname);

	/* total message length */
	l = m - message;

	memset(&ctx, 0, sizeof(ctx));
	blk_SHA1_Init(&ctx);
	blk_SHA1_Update(&ctx, message, l);
	blk_SHA1_Final(boot_seed, &ctx);

	srandom(read_u32(boot_seed));
	ha_random_seed(boot_seed, sizeof(boot_seed));
}

/* considers splicing proxies' maxconn, computes the ideal global.maxpipes
 * setting, and returns it. It may return -1 meaning "unlimited" if some
 * unlimited proxies have been found and the global.maxconn value is not yet
 * set. It may also return a value greater than maxconn if it's not yet set.
 * Note that a value of zero means there is no need for pipes. -1 is never
 * returned if global.maxconn is valid.
 */
static int compute_ideal_maxpipes()
{
	struct proxy *cur;
	int nbfe = 0, nbbe = 0;
	int unlimited = 0;
	int pipes;
	int max;

	for (cur = proxies_list; cur; cur = cur->next) {
		if (cur->options2 & (PR_O2_SPLIC_ANY)) {
			if (cur->cap & PR_CAP_FE) {
				max = cur->maxconn;
				nbfe += max;
				if (!max) {
					unlimited = 1;
					break;
				}
			}
			if (cur->cap & PR_CAP_BE) {
				max = cur->fullconn ? cur->fullconn : global.maxconn;
				nbbe += max;
				if (!max) {
					unlimited = 1;
					break;
				}
			}
		}
	}

	pipes = MAX(nbfe, nbbe);
	if (global.maxconn) {
		if (pipes > global.maxconn || unlimited)
			pipes = global.maxconn;
	} else if (unlimited) {
		pipes = -1;
	}

	return pipes >= 4 ? pipes / 4 : pipes;
}

/* considers global.maxsocks, global.maxpipes, async engines, SSL frontends and
 * rlimits and computes an ideal maxconn. It's meant to be called only when
 * maxsock contains the sum of listening FDs, before it is updated based on
 * maxconn and pipes. If there are not enough FDs left, DEFAULT_MAXCONN (by
 * default 100) is returned as it is expected that it will even run on tight
 * environments, and will maintain compatibility with previous packages that
 * used to rely on this value as the default one. The system will emit a
 * warning indicating how many FDs are missing anyway if needed.
 */
static int compute_ideal_maxconn()
{
	int ssl_sides = !!global.ssl_used_frontend + !!global.ssl_used_backend;
	int engine_fds = global.ssl_used_async_engines * ssl_sides;
	int pipes = compute_ideal_maxpipes();
	int remain = MAX(rlim_fd_cur_at_boot, rlim_fd_max_at_boot);
	int maxconn;

	/* we have to take into account these elements :
	 *   - number of engine_fds, which inflates the number of FD needed per
	 *     connection by this number.
	 *   - number of pipes per connection on average : for the unlimited
	 *     case, this is 0.5 pipe FDs per connection, otherwise it's a
	 *     fixed value of 2*pipes.
	 *   - two FDs per connection
	 */

	/* subtract listeners and checks */
	remain -= global.maxsock;

	/* one epoll_fd/kqueue_fd per thread */
	remain -= global.nbthread;

	/* one wake-up pipe (2 fd) per thread */
	remain -= 2 * global.nbthread;

	/* Fixed pipes values : we only subtract them if they're not larger
	 * than the remaining FDs because pipes are optional.
	 */
	if (pipes >= 0 && pipes * 2 < remain)
		remain -= pipes * 2;

	if (pipes < 0) {
		/* maxsock = maxconn * 2 + maxconn/4 * 2 + maxconn * engine_fds.
		 *         = maxconn * (2 + 0.5 + engine_fds)
		 *         = maxconn * (4 + 1 + 2*engine_fds) / 2
		 */
		maxconn = 2 * remain / (5 + 2 * engine_fds);
	} else {
		/* maxsock = maxconn * 2 + maxconn * engine_fds.
		 *         = maxconn * (2 + engine_fds)
		 */
		maxconn = remain / (2 + engine_fds);
	}

	return MAX(maxconn, DEFAULT_MAXCONN);
}

/*
 * This function initializes all the necessary variables. It only returns
 * if everything is OK. If something fails, it exits.
 */
static void init(int argc, char **argv)
{
	int arg_mode = 0;	/* MODE_DEBUG, ... */
	char *tmp;
	char *cfg_pidfile = NULL;
	int err_code = 0;
	char *err_msg = NULL;
	struct wordlist *wl;
	char *progname;
	char *change_dir = NULL;
	struct proxy *px;
	struct post_check_fct *pcf;
	int ideal_maxconn;

	global.mode = MODE_STARTING;
	old_argv = copy_argv(argc, argv);
	if (!old_argv) {
		ha_alert("failed to copy argv.\n");
		exit(1);
	}

	if (!init_trash_buffers(1)) {
		ha_alert("failed to initialize trash buffers.\n");
		exit(1);
	}

	/* NB: POSIX does not make it mandatory for gethostname() to NULL-terminate
	 * the string in case of truncation, and at least FreeBSD appears not to do
	 * it.
	 */
	memset(hostname, 0, sizeof(hostname));
	gethostname(hostname, sizeof(hostname) - 1);
	memset(localpeer, 0, sizeof(localpeer));
	memcpy(localpeer, hostname, (sizeof(hostname) > sizeof(localpeer) ? sizeof(localpeer) : sizeof(hostname)) - 1);
	setenv("HAPROXY_LOCALPEER", localpeer, 1);

	/* we were in mworker mode, we should restart in mworker mode */
	if (getenv("HAPROXY_MWORKER_REEXEC") != NULL)
		global.mode |= MODE_MWORKER;

	/*
	 * Initialize the previously static variables.
	 */

	totalconn = actconn = listeners = stopping = 0;
	killed = 0;


#ifdef HAPROXY_MEMMAX
	global.rlimit_memmax_all = HAPROXY_MEMMAX;
#endif

	tzset();
	tv_update_date(-1,-1);
	start_date = now;

	ha_random_boot(argv);

	if (init_acl() != 0)
		exit(1);

	/* warning, we init buffers later */
	if (!init_http(&err_msg)) {
		ha_alert("%s. Aborting.\n", err_msg);
		free(err_msg);
		abort();
	}

	/* Initialise lua. */
	hlua_init();

	/* Initialize process vars */
	vars_init(&global.vars, SCOPE_PROC);

	global.tune.options |= GTUNE_USE_SELECT;  /* select() is always available */
#if defined(USE_POLL)
	global.tune.options |= GTUNE_USE_POLL;
#endif
#if defined(USE_EPOLL)
	global.tune.options |= GTUNE_USE_EPOLL;
#endif
#if defined(USE_KQUEUE)
	global.tune.options |= GTUNE_USE_KQUEUE;
#endif
#if defined(USE_EVPORTS)
	global.tune.options |= GTUNE_USE_EVPORTS;
#endif
#if defined(USE_LINUX_SPLICE)
	global.tune.options |= GTUNE_USE_SPLICE;
#endif
#if defined(USE_GETADDRINFO)
	global.tune.options |= GTUNE_USE_GAI;
#endif
#if defined(SO_REUSEPORT)
	global.tune.options |= GTUNE_USE_REUSEPORT;
#endif

	pid = getpid();
	progname = *argv;
	while ((tmp = strchr(progname, '/')) != NULL)
		progname = tmp + 1;

	/* the process name is used for the logs only */
	chunk_initlen(&global.log_tag, strdup(progname), strlen(progname), strlen(progname));
	if (b_orig(&global.log_tag) == NULL) {
		chunk_destroy(&global.log_tag);
		ha_alert("Cannot allocate memory for log_tag.\n");
		exit(EXIT_FAILURE);
	}

	argc--; argv++;
	while (argc > 0) {
		char *flag;

		if (**argv == '-') {
			flag = *argv+1;

			/* 1 arg */
			if (*flag == 'v') {
				display_version();
				if (flag[1] == 'v')  /* -vv */
					display_build_opts();
				exit(0);
			}
#if defined(USE_EPOLL)
			else if (*flag == 'd' && flag[1] == 'e')
				global.tune.options &= ~GTUNE_USE_EPOLL;
#endif
#if defined(USE_POLL)
			else if (*flag == 'd' && flag[1] == 'p')
				global.tune.options &= ~GTUNE_USE_POLL;
#endif
#if defined(USE_KQUEUE)
			else if (*flag == 'd' && flag[1] == 'k')
				global.tune.options &= ~GTUNE_USE_KQUEUE;
#endif
#if defined(USE_EVPORTS)
			else if (*flag == 'd' && flag[1] == 'v')
				global.tune.options &= ~GTUNE_USE_EVPORTS;
#endif
#if defined(USE_LINUX_SPLICE)
			else if (*flag == 'd' && flag[1] == 'S')
				global.tune.options &= ~GTUNE_USE_SPLICE;
#endif
#if defined(USE_GETADDRINFO)
			else if (*flag == 'd' && flag[1] == 'G')
				global.tune.options &= ~GTUNE_USE_GAI;
#endif
#if defined(SO_REUSEPORT)
			else if (*flag == 'd' && flag[1] == 'R')
				global.tune.options &= ~GTUNE_USE_REUSEPORT;
#endif
			else if (*flag == 'd' && flag[1] == 'V')
				global.ssl_server_verify = SSL_SERVER_VERIFY_NONE;
			else if (*flag == 'V')
				arg_mode |= MODE_VERBOSE;
			else if (*flag == 'd' && flag[1] == 'b')
				arg_mode |= MODE_FOREGROUND;
			else if (*flag == 'd' && flag[1] == 'M')
				mem_poison_byte = flag[2] ? strtol(flag + 2, NULL, 0) : 'P';
			else if (*flag == 'd' && flag[1] == 'r')
				global.tune.options |= GTUNE_RESOLVE_DONTFAIL;
			else if (*flag == 'd')
				arg_mode |= MODE_DEBUG;
			else if (*flag == 'c')
				arg_mode |= MODE_CHECK;
			else if (*flag == 'D')
				arg_mode |= MODE_DAEMON;
			else if (*flag == 'W' && flag[1] == 's') {
				arg_mode |= MODE_MWORKER | MODE_FOREGROUND;
#if defined(USE_SYSTEMD)
				global.tune.options |= GTUNE_USE_SYSTEMD;
#else
				ha_alert("master-worker mode with systemd support (-Ws) requested, but not compiled. Use master-worker mode (-W) if you are not using Type=notify in your unit file or recompile with USE_SYSTEMD=1.\n\n");
				usage(progname);
#endif
			}
			else if (*flag == 'W')
				arg_mode |= MODE_MWORKER;
			else if (*flag == 'q')
				arg_mode |= MODE_QUIET;
			else if (*flag == 'x') {
				if (argc <= 1) {
					ha_alert("Unix socket path expected with the -x flag\n\n");
					usage(progname);
				}
				if (old_unixsocket)
					ha_warning("-x option already set, overwriting the value\n");
				old_unixsocket = argv[1];

				argv++;
				argc--;
			}
			else if (*flag == 'S') {
				struct wordlist *c;

				if (argc <= 1) {
					ha_alert("Socket and optional bind parameters expected with the -S flag\n");
					usage(progname);
				}
				if ((c = malloc(sizeof(*c))) == NULL || (c->s = strdup(argv[1])) == NULL) {
					ha_alert("Cannot allocate memory\n");
					exit(EXIT_FAILURE);
				}
				LIST_ADD(&mworker_cli_conf, &c->list);

				argv++;
				argc--;
			}
			else if (*flag == 's' && (flag[1] == 'f' || flag[1] == 't')) {
				/* list of pids to finish ('f') or terminate ('t') */

				if (flag[1] == 'f')
					oldpids_sig = SIGUSR1; /* finish then exit */
				else
					oldpids_sig = SIGTERM; /* terminate immediately */
				while (argc > 1 && argv[1][0] != '-') {
					char * endptr = NULL;
					oldpids = realloc(oldpids, (nb_oldpids + 1) * sizeof(int));
					if (!oldpids) {
						ha_alert("Cannot allocate old pid : out of memory.\n");
						exit(1);
					}
					argc--; argv++;
					errno = 0;
					oldpids[nb_oldpids] = strtol(*argv, &endptr, 10);
					if (errno) {
						ha_alert("-%2s option: failed to parse {%s}: %s\n",
							 flag,
							 *argv, strerror(errno));
						exit(1);
					} else if (endptr && strlen(endptr)) {
						while (isspace(*endptr)) endptr++;
						if (*endptr != 0) {
							ha_alert("-%2s option: some bytes unconsumed in PID list {%s}\n",
								 flag, endptr);
							exit(1);
						}
					}
					if (oldpids[nb_oldpids] <= 0)
						usage(progname);
					nb_oldpids++;
				}
			}
			else if (flag[0] == '-' && flag[1] == 0) { /* "--" */
				/* now that's a cfgfile list */
				argv++; argc--;
				while (argc > 0) {
					if (!list_append_word(&cfg_cfgfiles, *argv, &err_msg)) {
						ha_alert("Cannot load configuration file/directory %s : %s\n",
							 *argv,
							 err_msg);
						exit(1);
					}
					argv++; argc--;
				}
				break;
			}
			else { /* >=2 args */
				argv++; argc--;
				if (argc == 0)
					usage(progname);

				switch (*flag) {
				case 'C' : change_dir = *argv; break;
				case 'n' : cfg_maxconn = atol(*argv); break;
				case 'm' : global.rlimit_memmax_all = atol(*argv); break;
				case 'N' : cfg_maxpconn = atol(*argv); break;
				case 'L' :
					strncpy(localpeer, *argv, sizeof(localpeer) - 1);
					setenv("HAPROXY_LOCALPEER", localpeer, 1);
					break;
				case 'f' :
					if (!list_append_word(&cfg_cfgfiles, *argv, &err_msg)) {
						ha_alert("Cannot load configuration file/directory %s : %s\n",
							 *argv,
							 err_msg);
						exit(1);
					}
					break;
				case 'p' : cfg_pidfile = *argv; break;
				default: usage(progname);
				}
			}
		}
		else
			usage(progname);
		argv++; argc--;
	}

	global.mode |= (arg_mode & (MODE_DAEMON | MODE_MWORKER | MODE_FOREGROUND | MODE_VERBOSE
				    | MODE_QUIET | MODE_CHECK | MODE_DEBUG));

	if (getenv("HAPROXY_MWORKER_WAIT_ONLY")) {
		unsetenv("HAPROXY_MWORKER_WAIT_ONLY");
		global.mode |= MODE_MWORKER_WAIT;
		global.mode &= ~MODE_MWORKER;
	}

	if ((global.mode & (MODE_MWORKER | MODE_CHECK)) == MODE_MWORKER &&
	    (getenv("HAPROXY_MWORKER_REEXEC") != NULL)) {
		atexit_flag = 1;
		atexit(reexec_on_failure);
	}

	if (change_dir && chdir(change_dir) < 0) {
		ha_alert("Could not change to directory %s : %s\n", change_dir, strerror(errno));
		exit(1);
	}

	global.maxsock = 10; /* reserve 10 fds ; will be incremented by socket eaters */

	init_default_instance();

	/* in wait mode, we don't try to read the configuration files */
	if (!(global.mode & MODE_MWORKER_WAIT)) {
		char *env_cfgfiles = NULL;
		int env_err = 0;

		/* handle cfgfiles that are actually directories */
		cfgfiles_expand_directories();

		if (LIST_ISEMPTY(&cfg_cfgfiles))
			usage(progname);


		list_for_each_entry(wl, &cfg_cfgfiles, list) {
			int ret;

			if (env_err == 0) {
				if (!memprintf(&env_cfgfiles, "%s%s%s",
					       (env_cfgfiles ? env_cfgfiles : ""),
					       (env_cfgfiles ? ";" : ""), wl->s))
					env_err = 1;
			}

			ret = readcfgfile(wl->s);
			if (ret == -1) {
				ha_alert("Could not open configuration file %s : %s\n",
					 wl->s, strerror(errno));
				free(env_cfgfiles);
				exit(1);
			}
			if (ret & (ERR_ABORT|ERR_FATAL))
				ha_alert("Error(s) found in configuration file : %s\n", wl->s);
			err_code |= ret;
			if (err_code & ERR_ABORT) {
				free(env_cfgfiles);
				exit(1);
			}
		}

		/* do not try to resolve arguments nor to spot inconsistencies when
		 * the configuration contains fatal errors caused by files not found
		 * or failed memory allocations.
		 */
		if (err_code & (ERR_ABORT|ERR_FATAL)) {
			ha_alert("Fatal errors found in configuration.\n");
			free(env_cfgfiles);
			exit(1);
		}
		if (env_err) {
			ha_alert("Could not allocate memory for HAPROXY_CFGFILES env variable\n");
			exit(1);
		}
		setenv("HAPROXY_CFGFILES", env_cfgfiles, 1);
		free(env_cfgfiles);

	}
	if (global.mode & MODE_MWORKER) {
		int proc;
		struct mworker_proc *tmproc;

		setenv("HAPROXY_MWORKER", "1", 1);

		if (getenv("HAPROXY_MWORKER_REEXEC") == NULL) {

			tmproc = calloc(1, sizeof(*tmproc));
			if (!tmproc) {
				ha_alert("Cannot allocate process structures.\n");
				exit(EXIT_FAILURE);
			}
			tmproc->options |= PROC_O_TYPE_MASTER; /* master */
			tmproc->reloads = 0;
			tmproc->relative_pid = 0;
			tmproc->pid = pid;
			tmproc->timestamp = start_date.tv_sec;
			tmproc->ipc_fd[0] = -1;
			tmproc->ipc_fd[1] = -1;

			proc_self = tmproc;

			LIST_ADDQ(&proc_list, &tmproc->list);
		}

		for (proc = 0; proc < global.nbproc; proc++) {

			tmproc = calloc(1, sizeof(*tmproc));
			if (!tmproc) {
				ha_alert("Cannot allocate process structures.\n");
				exit(EXIT_FAILURE);
			}

			tmproc->options |= PROC_O_TYPE_WORKER; /* worker */
			tmproc->pid = -1;
			tmproc->reloads = 0;
			tmproc->timestamp = -1;
			tmproc->relative_pid = 1 + proc;
			tmproc->ipc_fd[0] = -1;
			tmproc->ipc_fd[1] = -1;

			if (mworker_cli_sockpair_new(tmproc, proc) < 0) {
				exit(EXIT_FAILURE);
			}

			LIST_ADDQ(&proc_list, &tmproc->list);
		}
	}
	if (global.mode & (MODE_MWORKER|MODE_MWORKER_WAIT)) {
		struct wordlist *it, *c;

		/* get the info of the children in the env */
		if (mworker_env_to_proc_list() < 0) {
			exit(EXIT_FAILURE);
		}

		if (!LIST_ISEMPTY(&mworker_cli_conf)) {

			if (mworker_cli_proxy_create() < 0) {
				ha_alert("Can't create the master's CLI.\n");
				exit(EXIT_FAILURE);
			}

			list_for_each_entry_safe(c, it, &mworker_cli_conf, list) {

				if (mworker_cli_proxy_new_listener(c->s) < 0) {
					ha_alert("Can't create the master's CLI.\n");
					exit(EXIT_FAILURE);
				}
				LIST_DEL(&c->list);
				free(c->s);
				free(c);
			}
		}
	}

	err_code |= check_config_validity();
	if (err_code & (ERR_ABORT|ERR_FATAL)) {
		ha_alert("Fatal errors found in configuration.\n");
		exit(1);
	}

	err_code |= pattern_finalize_config();
	if (err_code & (ERR_ABORT|ERR_FATAL)) {
		ha_alert("Failed to finalize pattern config.\n");
		exit(1);
	}

	/* recompute the amount of per-process memory depending on nbproc and
	 * the shared SSL cache size (allowed to exist in all processes).
	 */
	if (global.rlimit_memmax_all) {
#if defined (USE_OPENSSL) && !defined(USE_PRIVATE_CACHE)
		int64_t ssl_cache_bytes = global.tune.sslcachesize * 200LL;

		global.rlimit_memmax =
			((((int64_t)global.rlimit_memmax_all * 1048576LL) -
			  ssl_cache_bytes) / global.nbproc +
			 ssl_cache_bytes + 1048575LL) / 1048576LL;
#else
		global.rlimit_memmax = global.rlimit_memmax_all / global.nbproc;
#endif
	}

#ifdef USE_NS
        err_code |= netns_init();
        if (err_code & (ERR_ABORT|ERR_FATAL)) {
                ha_alert("Failed to initialize namespace support.\n");
                exit(1);
        }
#endif

	/* Apply server states */
	apply_server_state();

	for (px = proxies_list; px; px = px->next)
		srv_compute_all_admin_states(px);

	/* Apply servers' configured address */
	err_code |= srv_init_addr();
	if (err_code & (ERR_ABORT|ERR_FATAL)) {
		ha_alert("Failed to initialize server(s) addr.\n");
		exit(1);
	}

	if (global.mode & MODE_CHECK) {
		struct peers *pr;
		struct proxy *px;

		for (pr = cfg_peers; pr; pr = pr->next)
			if (pr->peers_fe)
				break;

		for (px = proxies_list; px; px = px->next)
			if (px->state == PR_STNEW && !LIST_ISEMPTY(&px->conf.listeners))
				break;

		if (pr || px) {
			/* At least one peer or one listener has been found */
			qfprintf(stdout, "Configuration file is valid\n");
			exit(0);
		}
		qfprintf(stdout, "Configuration file has no error but will not start (no listener) => exit(2).\n");
		exit(2);
	}

	global_listener_queue_task = task_new(MAX_THREADS_MASK);
	if (!global_listener_queue_task) {
		ha_alert("Out of memory when initializing global task\n");
		exit(1);
	}
	/* very simple initialization, users will queue the task if needed */
	global_listener_queue_task->context = NULL; /* not even a context! */
	global_listener_queue_task->process = manage_global_listener_queue;

	/* now we know the buffer size, we can initialize the channels and buffers */
	init_buffer();

	list_for_each_entry(pcf, &post_check_list, list) {
		err_code |= pcf->fct();
		if (err_code & (ERR_ABORT|ERR_FATAL))
			exit(1);
	}

	if (cfg_maxconn > 0)
		global.maxconn = cfg_maxconn;

	if (global.stats_fe)
		global.maxsock += global.stats_fe->maxconn;

	if (cfg_peers) {
		/* peers also need to bypass global maxconn */
		struct peers *p = cfg_peers;

		for (p = cfg_peers; p; p = p->next)
			if (p->peers_fe)
				global.maxsock += p->peers_fe->maxconn;
	}

	if (cfg_pidfile) {
		free(global.pidfile);
		global.pidfile = strdup(cfg_pidfile);
	}

	/* Now we want to compute the maxconn and possibly maxsslconn values.
	 * It's a bit tricky. Maxconn defaults to the pre-computed value based
	 * on rlim_fd_cur and the number of FDs in use due to the configuration,
	 * and maxsslconn defaults to DEFAULT_MAXSSLCONN. On top of that we can
	 * enforce a lower limit based on memmax.
	 *
	 * If memmax is set, then it depends on which values are set. If
	 * maxsslconn is set, we use memmax to determine how many cleartext
	 * connections may be added, and set maxconn to the sum of the two.
	 * If maxconn is set and not maxsslconn, maxsslconn is computed from
	 * the remaining amount of memory between memmax and the cleartext
	 * connections. If neither are set, then it is considered that all
	 * connections are SSL-capable, and maxconn is computed based on this,
	 * then maxsslconn accordingly. We need to know if SSL is used on the
	 * frontends, backends, or both, because when it's used on both sides,
	 * we need twice the value for maxsslconn, but we only count the
	 * handshake once since it is not performed on the two sides at the
	 * same time (frontend-side is terminated before backend-side begins).
	 * The SSL stack is supposed to have filled ssl_session_cost and
	 * ssl_handshake_cost during its initialization. In any case, if
	 * SYSTEM_MAXCONN is set, we still enforce it as an upper limit for
	 * maxconn in order to protect the system.
	 */
	ideal_maxconn = compute_ideal_maxconn();

	if (!global.rlimit_memmax) {
		if (global.maxconn == 0) {
			global.maxconn = ideal_maxconn;
			if (global.mode & (MODE_VERBOSE|MODE_DEBUG))
				fprintf(stderr, "Note: setting global.maxconn to %d.\n", global.maxconn);
		}
	}
#ifdef USE_OPENSSL
	else if (!global.maxconn && !global.maxsslconn &&
		 (global.ssl_used_frontend || global.ssl_used_backend)) {
		/* memmax is set, compute everything automatically. Here we want
		 * to ensure that all SSL connections will be served. We take
		 * care of the number of sides where SSL is used, and consider
		 * the worst case : SSL used on both sides and doing a handshake
		 * simultaneously. Note that we can't have more than maxconn
		 * handshakes at a time by definition, so for the worst case of
		 * two SSL conns per connection, we count a single handshake.
		 */
		int sides = !!global.ssl_used_frontend + !!global.ssl_used_backend;
		int64_t mem = global.rlimit_memmax * 1048576ULL;

		mem -= global.tune.sslcachesize * 200; // about 200 bytes per SSL cache entry
		mem -= global.maxzlibmem;
		mem = mem * MEM_USABLE_RATIO;

		global.maxconn = mem /
			((STREAM_MAX_COST + 2 * global.tune.bufsize) +    // stream + 2 buffers per stream
			 sides * global.ssl_session_max_cost + // SSL buffers, one per side
			 global.ssl_handshake_max_cost);       // 1 handshake per connection max

		global.maxconn = MIN(global.maxconn, ideal_maxconn);
		global.maxconn = round_2dig(global.maxconn);
#ifdef SYSTEM_MAXCONN
		if (global.maxconn > SYSTEM_MAXCONN)
			global.maxconn = SYSTEM_MAXCONN;
#endif /* SYSTEM_MAXCONN */
		global.maxsslconn = sides * global.maxconn;
		if (global.mode & (MODE_VERBOSE|MODE_DEBUG))
			fprintf(stderr, "Note: setting global.maxconn to %d and global.maxsslconn to %d.\n",
			        global.maxconn, global.maxsslconn);
	}
	else if (!global.maxsslconn &&
		 (global.ssl_used_frontend || global.ssl_used_backend)) {
		/* memmax and maxconn are known, compute maxsslconn automatically.
		 * maxsslconn being forced, we don't know how many of it will be
		 * on each side if both sides are being used. The worst case is
		 * when all connections use only one SSL instance because
		 * handshakes may be on two sides at the same time.
		 */
		int sides = !!global.ssl_used_frontend + !!global.ssl_used_backend;
		int64_t mem = global.rlimit_memmax * 1048576ULL;
		int64_t sslmem;

		mem -= global.tune.sslcachesize * 200; // about 200 bytes per SSL cache entry
		mem -= global.maxzlibmem;
		mem = mem * MEM_USABLE_RATIO;

		sslmem = mem - global.maxconn * (int64_t)(STREAM_MAX_COST + 2 * global.tune.bufsize);
		global.maxsslconn = sslmem / (global.ssl_session_max_cost + global.ssl_handshake_max_cost);
		global.maxsslconn = round_2dig(global.maxsslconn);

		if (sslmem <= 0 || global.maxsslconn < sides) {
			ha_alert("Cannot compute the automatic maxsslconn because global.maxconn is already too "
				 "high for the global.memmax value (%d MB). The absolute maximum possible value "
				 "without SSL is %d, but %d was found and SSL is in use.\n",
				 global.rlimit_memmax,
				 (int)(mem / (STREAM_MAX_COST + 2 * global.tune.bufsize)),
				 global.maxconn);
			exit(1);
		}

		if (global.maxsslconn > sides * global.maxconn)
			global.maxsslconn = sides * global.maxconn;

		if (global.mode & (MODE_VERBOSE|MODE_DEBUG))
			fprintf(stderr, "Note: setting global.maxsslconn to %d\n", global.maxsslconn);
	}
#endif
	else if (!global.maxconn) {
		/* memmax and maxsslconn are known/unused, compute maxconn automatically */
		int sides = !!global.ssl_used_frontend + !!global.ssl_used_backend;
		int64_t mem = global.rlimit_memmax * 1048576ULL;
		int64_t clearmem;

		if (global.ssl_used_frontend || global.ssl_used_backend)
			mem -= global.tune.sslcachesize * 200; // about 200 bytes per SSL cache entry

		mem -= global.maxzlibmem;
		mem = mem * MEM_USABLE_RATIO;

		clearmem = mem;
		if (sides)
			clearmem -= (global.ssl_session_max_cost + global.ssl_handshake_max_cost) * (int64_t)global.maxsslconn;

		global.maxconn = clearmem / (STREAM_MAX_COST + 2 * global.tune.bufsize);
		global.maxconn = MIN(global.maxconn, ideal_maxconn);
		global.maxconn = round_2dig(global.maxconn);
#ifdef SYSTEM_MAXCONN
		if (global.maxconn > SYSTEM_MAXCONN)
			global.maxconn = SYSTEM_MAXCONN;
#endif /* SYSTEM_MAXCONN */

		if (clearmem <= 0 || !global.maxconn) {
			ha_alert("Cannot compute the automatic maxconn because global.maxsslconn is already too "
				 "high for the global.memmax value (%d MB). The absolute maximum possible value "
				 "is %d, but %d was found.\n",
				 global.rlimit_memmax,
				 (int)(mem / (global.ssl_session_max_cost + global.ssl_handshake_max_cost)),
				 global.maxsslconn);
			exit(1);
		}

		if (global.mode & (MODE_VERBOSE|MODE_DEBUG)) {
			if (sides && global.maxsslconn > sides * global.maxconn) {
				fprintf(stderr, "Note: global.maxsslconn is forced to %d which causes global.maxconn "
				        "to be limited to %d. Better reduce global.maxsslconn to get more "
				        "room for extra connections.\n", global.maxsslconn, global.maxconn);
			}
			fprintf(stderr, "Note: setting global.maxconn to %d\n", global.maxconn);
		}
	}

	if (!global.maxpipes)
		global.maxpipes = compute_ideal_maxpipes();

	global.hardmaxconn = global.maxconn;  /* keep this max value */
	global.maxsock += global.maxconn * 2; /* each connection needs two sockets */
	global.maxsock += global.maxpipes * 2; /* each pipe needs two FDs */
	global.maxsock += global.nbthread;     /* one epoll_fd/kqueue_fd per thread */
	global.maxsock += 2 * global.nbthread; /* one wake-up pipe (2 fd) per thread */

	/* compute fd used by async engines */
	if (global.ssl_used_async_engines) {
		int sides = !!global.ssl_used_frontend + !!global.ssl_used_backend;
		global.maxsock += global.maxconn * sides * global.ssl_used_async_engines;
	}

	/* update connection pool thresholds */
	global.tune.pool_low_count  = ((long long)global.maxsock * global.tune.pool_low_ratio  + 99) / 100;
	global.tune.pool_high_count = ((long long)global.maxsock * global.tune.pool_high_ratio + 99) / 100;

	proxy_adjust_all_maxconn();

	if (global.tune.maxpollevents <= 0)
		global.tune.maxpollevents = MAX_POLL_EVENTS;

	if (global.tune.runqueue_depth <= 0)
		global.tune.runqueue_depth = RUNQUEUE_DEPTH;

	if (global.tune.recv_enough == 0)
		global.tune.recv_enough = MIN_RECV_AT_ONCE_ENOUGH;

	if (global.tune.maxrewrite < 0)
		global.tune.maxrewrite = MAXREWRITE;

	if (global.tune.maxrewrite >= global.tune.bufsize / 2)
		global.tune.maxrewrite = global.tune.bufsize / 2;

	if (arg_mode & (MODE_DEBUG | MODE_FOREGROUND)) {
		/* command line debug mode inhibits configuration mode */
		global.mode &= ~(MODE_DAEMON | MODE_QUIET);
		global.mode |= (arg_mode & (MODE_DEBUG | MODE_FOREGROUND));
	}

	if (arg_mode & MODE_DAEMON) {
		/* command line daemon mode inhibits foreground and debug modes mode */
		global.mode &= ~(MODE_DEBUG | MODE_FOREGROUND);
		global.mode |= arg_mode & MODE_DAEMON;
	}

	global.mode |= (arg_mode & (MODE_QUIET | MODE_VERBOSE));

	if ((global.mode & MODE_DEBUG) && (global.mode & (MODE_DAEMON | MODE_QUIET))) {
		ha_warning("<debug> mode incompatible with <quiet> and <daemon>. Keeping <debug> only.\n");
		global.mode &= ~(MODE_DAEMON | MODE_QUIET);
	}

	if ((global.nbproc > 1) && !(global.mode & (MODE_DAEMON | MODE_MWORKER))) {
		if (!(global.mode & (MODE_FOREGROUND | MODE_DEBUG)))
			ha_warning("<nbproc> is only meaningful in daemon mode or master-worker mode. Setting limit to 1 process.\n");
		global.nbproc = 1;
	}

	if (global.nbproc < 1)
		global.nbproc = 1;

	if (global.nbthread < 1)
		global.nbthread = 1;

	/* Realloc trash buffers because global.tune.bufsize may have changed */
	if (!init_trash_buffers(0)) {
		ha_alert("failed to initialize trash buffers.\n");
		exit(1);
	}

	if (!init_log_buffers()) {
		ha_alert("failed to initialize log buffers.\n");
		exit(1);
	}

	/*
	 * Note: we could register external pollers here.
	 * Built-in pollers have been registered before main().
	 */

	if (!(global.tune.options & GTUNE_USE_KQUEUE))
		disable_poller("kqueue");

	if (!(global.tune.options & GTUNE_USE_EVPORTS))
		disable_poller("evports");

	if (!(global.tune.options & GTUNE_USE_EPOLL))
		disable_poller("epoll");

	if (!(global.tune.options & GTUNE_USE_POLL))
		disable_poller("poll");

	if (!(global.tune.options & GTUNE_USE_SELECT))
		disable_poller("select");

	/* Note: we could disable any poller by name here */

	if (global.mode & (MODE_VERBOSE|MODE_DEBUG)) {
		list_pollers(stderr);
		fprintf(stderr, "\n");
		list_filters(stderr);
	}

	if (!init_pollers()) {
		ha_alert("No polling mechanism available.\n"
			 "  It is likely that haproxy was built with TARGET=generic and that FD_SETSIZE\n"
			 "  is too low on this platform to support maxconn and the number of listeners\n"
			 "  and servers. You should rebuild haproxy specifying your system using TARGET=\n"
			 "  in order to support other polling systems (poll, epoll, kqueue) or reduce the\n"
			 "  global maxconn setting to accommodate the system's limitation. For reference,\n"
			 "  FD_SETSIZE=%d on this system, global.maxconn=%d resulting in a maximum of\n"
			 "  %d file descriptors. You should thus reduce global.maxconn by %d. Also,\n"
			 "  check build settings using 'haproxy -vv'.\n\n",
			 FD_SETSIZE, global.maxconn, global.maxsock, (global.maxsock + 1 - FD_SETSIZE) / 2);
		exit(1);
	}
	if (global.mode & (MODE_VERBOSE|MODE_DEBUG)) {
		printf("Using %s() as the polling mechanism.\n", cur_poller.name);
	}

	if (!global.node)
		global.node = strdup(hostname);

	if (!hlua_post_init())
		exit(1);

	free(err_msg);
}

static void deinit_acl_cond(struct acl_cond *cond)
{
	struct acl_term_suite *suite, *suiteb;
	struct acl_term *term, *termb;

	if (!cond)
		return;

	list_for_each_entry_safe(suite, suiteb, &cond->suites, list) {
		list_for_each_entry_safe(term, termb, &suite->terms, list) {
			LIST_DEL(&term->list);
			free(term);
		}
		LIST_DEL(&suite->list);
		free(suite);
	}

	free(cond);
}

static void deinit_act_rules(struct list *rules)
{
	struct act_rule *rule, *ruleb;

	list_for_each_entry_safe(rule, ruleb, rules, list) {
		LIST_DEL(&rule->list);
		deinit_acl_cond(rule->cond);
		free(rule);
	}
}

static void deinit_stick_rules(struct list *rules)
{
	struct sticking_rule *rule, *ruleb;

	list_for_each_entry_safe(rule, ruleb, rules, list) {
		LIST_DEL(&rule->list);
		deinit_acl_cond(rule->cond);
		release_sample_expr(rule->expr);
		free(rule);
	}
}

void deinit(void)
{
	struct proxy *p = proxies_list, *p0;
	struct cap_hdr *h,*h_next;
	struct server *s,*s_next;
	struct listener *l,*l_next;
	struct acl_cond *cond, *condb;
	struct hdr_exp *exp, *expb;
	struct acl *acl, *aclb;
	struct switching_rule *rule, *ruleb;
	struct server_rule *srule, *sruleb;
	struct redirect_rule *rdr, *rdrb;
	struct wordlist *wl, *wlb;
	struct cond_wordlist *cwl, *cwlb;
	struct uri_auth *uap, *ua = NULL;
	struct logsrv *log, *logb;
	struct logformat_node *lf, *lfb;
	struct bind_conf *bind_conf, *bind_back;
	struct build_opts_str *bol, *bolb;
	struct post_deinit_fct *pdf;
	int i;

	deinit_signals();
	while (p) {
		free(p->conf.file);
		free(p->id);
		free(p->check_req);
		free(p->check_hdrs);
		free(p->check_body);
		free(p->cookie_name);
		free(p->cookie_domain);
		free(p->cookie_attrs);
		free(p->lbprm.arg_str);
		free(p->server_state_file_name);
		free(p->capture_name);
		free(p->monitor_uri);
		free(p->rdp_cookie_name);
		free(p->invalid_rep);
		free(p->invalid_req);
#if defined(CONFIG_HAP_TRANSPARENT)
		free(p->conn_src.bind_hdr_name);
#endif
		if (p->conf.logformat_string != default_http_log_format &&
		    p->conf.logformat_string != default_tcp_log_format &&
		    p->conf.logformat_string != clf_http_log_format)
			free(p->conf.logformat_string);

		free(p->conf.lfs_file);
		free(p->conf.uniqueid_format_string);
		free(p->conf.uif_file);
		if ((p->lbprm.algo & BE_LB_LKUP) == BE_LB_LKUP_MAP)
			free(p->lbprm.map.srv);

		if (p->conf.logformat_sd_string != default_rfc5424_sd_log_format)
			free(p->conf.logformat_sd_string);
		free(p->conf.lfsd_file);

		for (i = 0; i < HTTP_ERR_SIZE; i++)
			chunk_destroy(&p->errmsg[i]);

		list_for_each_entry_safe(cwl, cwlb, &p->req_add, list) {
			LIST_DEL(&cwl->list);
			free(cwl->s);
			free(cwl);
		}

		list_for_each_entry_safe(cwl, cwlb, &p->rsp_add, list) {
			LIST_DEL(&cwl->list);
			free(cwl->s);
			free(cwl);
		}

		list_for_each_entry_safe(cond, condb, &p->mon_fail_cond, list) {
			LIST_DEL(&cond->list);
			prune_acl_cond(cond);
			free(cond);
		}

		for (exp = p->req_exp; exp != NULL; ) {
			regex_free(exp->preg);
			free((char *)exp->replace);
			expb = exp;
			exp = exp->next;
			free(expb);
		}

		for (exp = p->rsp_exp; exp != NULL; ) {
			regex_free(exp->preg);
			free((char *)exp->replace);
			expb = exp;
			exp = exp->next;
			free(expb);
		}

		/* build a list of unique uri_auths */
		if (!ua)
			ua = p->uri_auth;
		else {
			/* check if p->uri_auth is unique */
			for (uap = ua; uap; uap=uap->next)
				if (uap == p->uri_auth)
					break;

			if (!uap && p->uri_auth) {
				/* add it, if it is */
				p->uri_auth->next = ua;
				ua = p->uri_auth;
			}
		}

		list_for_each_entry_safe(acl, aclb, &p->acl, list) {
			LIST_DEL(&acl->list);
			prune_acl(acl);
			free(acl);
		}

		list_for_each_entry_safe(srule, sruleb, &p->server_rules, list) {
			LIST_DEL(&srule->list);
			prune_acl_cond(srule->cond);
			free(srule->cond);
			free(srule);
		}

		list_for_each_entry_safe(rule, ruleb, &p->switching_rules, list) {
			LIST_DEL(&rule->list);
			if (rule->cond) {
				prune_acl_cond(rule->cond);
				free(rule->cond);
			}
			free(rule->file);
			free(rule);
		}

		list_for_each_entry_safe(rdr, rdrb, &p->redirect_rules, list) {
			LIST_DEL(&rdr->list);
			if (rdr->cond) {
				prune_acl_cond(rdr->cond);
				free(rdr->cond);
			}
			free(rdr->rdr_str);
			list_for_each_entry_safe(lf, lfb, &rdr->rdr_fmt, list) {
				LIST_DEL(&lf->list);
				free(lf);
			}
			free(rdr);
		}

		list_for_each_entry_safe(log, logb, &p->logsrvs, list) {
			LIST_DEL(&log->list);
			free(log);
		}

		list_for_each_entry_safe(lf, lfb, &p->logformat, list) {
			LIST_DEL(&lf->list);
			release_sample_expr(lf->expr);
			free(lf->arg);
			free(lf);
		}

		list_for_each_entry_safe(lf, lfb, &p->logformat_sd, list) {
			LIST_DEL(&lf->list);
			release_sample_expr(lf->expr);
			free(lf->arg);
			free(lf);
		}

		deinit_act_rules(&p->tcp_req.inspect_rules);
		deinit_act_rules(&p->tcp_rep.inspect_rules);
		deinit_act_rules(&p->tcp_req.l4_rules);
		deinit_act_rules(&p->tcp_req.l5_rules);
		deinit_act_rules(&p->http_req_rules);
		deinit_act_rules(&p->http_res_rules);

		deinit_stick_rules(&p->storersp_rules);
		deinit_stick_rules(&p->sticking_rules);

		h = p->req_cap;
		while (h) {
			h_next = h->next;
			free(h->name);
			pool_destroy(h->pool);
			free(h);
			h = h_next;
		}/* end while(h) */

		h = p->rsp_cap;
		while (h) {
			h_next = h->next;
			free(h->name);
			pool_destroy(h->pool);
			free(h);
			h = h_next;
		}/* end while(h) */

		s = p->srv;
		while (s) {
			s_next = s->next;


			task_destroy(s->warmup);

			free(s->id);
			free(s->cookie);
			free(s->hostname_dn);
			free((char*)s->conf.file);
			free(s->idle_conns);
			free(s->priv_conns);
			free(s->safe_conns);
			free(s->idle_orphan_conns);
			free(s->curr_idle_thr);
			deinit_srv_check(s);
			deinit_srv_agent_check(s);
			free(s->lb_nodes);

			if (s->use_ssl == 1 || s->check.use_ssl == 1 || (s->proxy->options & PR_O_TCPCHK_SSL)) {
				if (xprt_get(XPRT_SSL) && xprt_get(XPRT_SSL)->destroy_srv)
					xprt_get(XPRT_SSL)->destroy_srv(s);
			}
			HA_SPIN_DESTROY(&s->lock);
			free(s);
			s = s_next;
		}/* end while(s) */

		list_for_each_entry_safe(l, l_next, &p->conf.listeners, by_fe) {
			/*
			 * Zombie proxy, the listener just pretend to be up
			 * because they still hold an opened fd.
			 * Close it and give the listener its real state.
			 */
			if (p->state == PR_STSTOPPED && l->state >= LI_ZOMBIE) {
				close(l->fd);
				l->state = LI_INIT;
			}
			unbind_listener(l);
			delete_listener(l);
			LIST_DEL(&l->by_fe);
			LIST_DEL(&l->by_bind);
			free(l->name);
			free(l->counters);
			free(l);
		}

		/* Release unused SSL configs. */
		list_for_each_entry_safe(bind_conf, bind_back, &p->conf.bind, by_fe) {
			if (bind_conf->xprt->destroy_bind_conf)
				bind_conf->xprt->destroy_bind_conf(bind_conf);
			free(bind_conf->file);
			free(bind_conf->arg);
			LIST_DEL(&bind_conf->by_fe);
			free(bind_conf);
		}

		flt_deinit(p);

		free(p->desc);
		free(p->fwdfor_hdr_name);

		task_destroy(p->task);

		pool_destroy(p->req_cap_pool);
		pool_destroy(p->rsp_cap_pool);
		if (p->table)
			pool_destroy(p->table->pool);

		p0 = p;
		p = p->next;
		HA_SPIN_DESTROY(&p0->lbprm.lock);
		HA_SPIN_DESTROY(&p0->lock);
		free(p0);
	}/* end while(p) */

	while (ua) {
		uap = ua;
		ua = ua->next;

		free(uap->uri_prefix);
		free(uap->auth_realm);
		free(uap->node);
		free(uap->desc);

		userlist_free(uap->userlist);
		deinit_act_rules(&uap->http_req_rules);

		free(uap);
	}

	userlist_free(userlist);

	cfg_unregister_sections();

	deinit_log_buffers();

	protocol_unbind_all();

	list_for_each_entry(pdf, &post_deinit_list, list)
		pdf->fct();

	free(global.log_send_hostname); global.log_send_hostname = NULL;
	chunk_destroy(&global.log_tag);
	free(global.chroot);  global.chroot = NULL;
	free(global.pidfile); global.pidfile = NULL;
	free(global.node);    global.node = NULL;
	free(global.desc);    global.desc = NULL;
	free(oldpids);        oldpids = NULL;
	task_destroy(global_listener_queue_task); global_listener_queue_task = NULL;
	free(global.server_state_base); global.server_state_base = NULL;
	free(global.server_state_file); global.server_state_file = NULL;
	task_destroy(idle_conn_task);
	idle_conn_task = NULL;

	list_for_each_entry_safe(log, logb, &global.logsrvs, list) {
			LIST_DEL(&log->list);
			free(log);
		}
	list_for_each_entry_safe(wl, wlb, &cfg_cfgfiles, list) {
		free(wl->s);
		LIST_DEL(&wl->list);
		free(wl);
	}

	list_for_each_entry_safe(bol, bolb, &build_opts_list, list) {
		if (bol->must_free)
			free((void *)bol->str);
		LIST_DEL(&bol->list);
		free(bol);
	}

	vars_prune(&global.vars, NULL, NULL);
	pool_destroy_all();
	deinit_pollers();
} /* end deinit() */


/* Runs the polling loop */
static void run_poll_loop()
{
	int next, wake;

	tv_update_date(0,1);
	while (1) {
		/* Process a few tasks */
		process_runnable_tasks();

		/* check if we caught some signals and process them in the
		 first thread */
		if (tid == 0)
			signal_process_queue();

		/* Check if we can expire some tasks */
		next = wake_expired_tasks();

		/* also stop  if we failed to cleanly stop all tasks */
		if (killed > 1)
			break;

		/* expire immediately if events are pending */
		wake = 1;
		if (fd_cache_mask & tid_bit)
			activity[tid].wake_cache++;
		else if (thread_has_tasks())
			activity[tid].wake_tasks++;
		else if (signal_queue_len && tid == 0)
			activity[tid].wake_signal++;
		else {
			_HA_ATOMIC_OR(&sleeping_thread_mask, tid_bit);
			__ha_barrier_atomic_store();
			if (global_tasks_mask & tid_bit) {
				activity[tid].wake_tasks++;
				_HA_ATOMIC_AND(&sleeping_thread_mask, ~tid_bit);
			} else
				wake = 0;
		}

		if (!wake) {
			int i;

			if (stopping) {
				_HA_ATOMIC_OR(&stopping_thread_mask, tid_bit);
				/* notify all threads that stopping was just set */
				for (i = 0; i < global.nbthread; i++)
					if (((all_threads_mask & ~stopping_thread_mask) >> i) & 1)
						wake_thread(i);
			}

			/* stop when there's nothing left to do */
			if ((jobs - unstoppable_jobs) == 0 &&
			    (stopping_thread_mask & all_threads_mask) == all_threads_mask) {
				/* wake all threads waiting on jobs==0 */
				for (i = 0; i < global.nbthread; i++)
					if (((all_threads_mask & ~tid_bit) >> i) & 1)
						wake_thread(i);
				break;
			}
		}

		/* The poller will ensure it returns around <next> */
		cur_poller.poll(&cur_poller, next, wake);
		if (sleeping_thread_mask & tid_bit)
			_HA_ATOMIC_AND(&sleeping_thread_mask, ~tid_bit);
		fd_process_cached_events();

		activity[tid].loops++;
	}
}

static void *run_thread_poll_loop(void *data)
{
	struct per_thread_alloc_fct  *ptaf;
	struct per_thread_init_fct   *ptif;
	struct per_thread_deinit_fct *ptdf;
	struct per_thread_free_fct   *ptff;
	static int init_left = 0;
	__decl_hathreads(static pthread_mutex_t init_mutex = PTHREAD_MUTEX_INITIALIZER);
	__decl_hathreads(static pthread_cond_t  init_cond  = PTHREAD_COND_INITIALIZER);

	ha_set_tid((unsigned long)data);

#if (_POSIX_TIMERS > 0) && defined(_POSIX_THREAD_CPUTIME)
#ifdef USE_THREAD
	pthread_getcpuclockid(pthread_self(), &ti->clock_id);
#else
	ti->clock_id = CLOCK_THREAD_CPUTIME_ID;
#endif
#endif
	/* Now, initialize one thread init at a time. This is better since
	 * some init code is a bit tricky and may release global resources
	 * after reallocating them locally. This will also ensure there is
	 * no race on file descriptors allocation.
	 */
#ifdef USE_THREAD
	pthread_mutex_lock(&init_mutex);
#endif
	/* The first thread must set the number of threads left */
	if (!init_left)
		init_left = global.nbthread;
	init_left--;

	tv_update_date(-1,-1);

	/* per-thread alloc calls performed here are not allowed to snoop on
	 * other threads, so they are free to initialize at their own rhythm
	 * as long as they act as if they were alone. None of them may rely
	 * on resources initialized by the other ones.
	 */
	list_for_each_entry(ptaf, &per_thread_alloc_list, list) {
		if (!ptaf->fct()) {
			ha_alert("failed to allocate resources for thread %u.\n", tid);
			exit(1);
		}
	}

	/* per-thread init calls performed here are not allowed to snoop on
	 * other threads, so they are free to initialize at their own rhythm
	 * as long as they act as if they were alone.
	 */
	list_for_each_entry(ptif, &per_thread_init_list, list) {
		if (!ptif->fct()) {
			ha_alert("failed to initialize thread %u.\n", tid);
			exit(1);
		}
	}

	/* enabling protocols will result in fd_insert() calls to be performed,
	 * we want all threads to have already allocated their local fd tables
	 * before doing so, thus only the last thread does it.
	 */
	if (init_left == 0)
		protocol_enable_all();

#ifdef USE_THREAD
	pthread_cond_broadcast(&init_cond);
	pthread_mutex_unlock(&init_mutex);

	/* now wait for other threads to finish starting */
	pthread_mutex_lock(&init_mutex);
	while (init_left)
		pthread_cond_wait(&init_cond, &init_mutex);
	pthread_mutex_unlock(&init_mutex);
#endif

	run_poll_loop();

	list_for_each_entry(ptdf, &per_thread_deinit_list, list)
		ptdf->fct();

	list_for_each_entry(ptff, &per_thread_free_list, list)
		ptff->fct();

#ifdef USE_THREAD
	_HA_ATOMIC_AND(&all_threads_mask, ~tid_bit);
	if (tid > 0)
		pthread_exit(NULL);
#endif
	return NULL;
}

/* This is the global management task for listeners. It enables listeners waiting
 * for global resources when there are enough free resource, or at least once in
 * a while. It is designed to be called as a task.
 */
static struct task *manage_global_listener_queue(struct task *t, void *context, unsigned short state)
{
	int next = TICK_ETERNITY;
	/* queue is empty, nothing to do */
	if (LIST_ISEMPTY(&global_listener_queue))
		goto out;

	/* If there are still too many concurrent connections, let's wait for
	 * some of them to go away. We don't need to re-arm the timer because
	 * each of them will scan the queue anyway.
	 */
	if (unlikely(actconn >= global.maxconn))
		goto out;

	/* We should periodically try to enable listeners waiting for a global
	 * resource here, because it is possible, though very unlikely, that
	 * they have been blocked by a temporary lack of global resource such
	 * as a file descriptor or memory and that the temporary condition has
	 * disappeared.
	 */
	dequeue_all_listeners(&global_listener_queue);

 out:
	t->expire = next;
	task_queue(t);
	return t;
}

int main(int argc, char **argv)
{
	int err, retry;
	struct rlimit limit;
	char errmsg[100];
	int pidfd = -1;
	int intovf = (unsigned char)argc + 1; /* let the compiler know it's strictly positive */

	/* Catch forced CFLAGS that miss 2-complement integer overflow */
	if (intovf + 0x7FFFFFFF >= intovf) {
		fprintf(stderr,
		        "FATAL ERROR: invalid code detected -- cannot go further, please recompile!\n"
			"The source code was miscompiled by the compiler, which usually indicates that\n"
			"some of the CFLAGS needed to work around overzealous compiler optimizations\n"
			"were overwritten at build time. Please do not force CFLAGS, and read Makefile\n"
			"and INSTALL files to decide on the best way to pass your local build options.\n"
		        "\nBuild options :"
#ifdef BUILD_TARGET
		       "\n  TARGET  = " BUILD_TARGET
#endif
#ifdef BUILD_CPU
		       "\n  CPU     = " BUILD_CPU
#endif
#ifdef BUILD_CC
		       "\n  CC      = " BUILD_CC
#endif
#ifdef BUILD_CFLAGS
		       "\n  CFLAGS  = " BUILD_CFLAGS
#endif
#ifdef BUILD_OPTIONS
		       "\n  OPTIONS = " BUILD_OPTIONS
#endif
#ifdef BUILD_DEBUG
		       "\n  DEBUG   = " BUILD_DEBUG
#endif
		       "\n\n");
		return 1;
	}

	setvbuf(stdout, NULL, _IONBF, 0);

	/* this can only safely be done here, though it's optimized away by
	 * the compiler.
	 */
	if (MAX_PROCS < 1 || MAX_PROCS > LONGBITS) {
		ha_alert("MAX_PROCS value must be between 1 and %d inclusive; "
		         "HAProxy was built with value %d, please fix it and rebuild.\n",
			 LONGBITS, MAX_PROCS);
		exit(1);
	}

	/* take a copy of initial limits before we possibly change them */
	getrlimit(RLIMIT_NOFILE, &limit);

	if (limit.rlim_max == RLIM_INFINITY)
		limit.rlim_max = limit.rlim_cur;
	rlim_fd_cur_at_boot = limit.rlim_cur;
	rlim_fd_max_at_boot = limit.rlim_max;

	/* process all initcalls in order of potential dependency */
	RUN_INITCALLS(STG_PREPARE);
	RUN_INITCALLS(STG_LOCK);
	RUN_INITCALLS(STG_ALLOC);
	RUN_INITCALLS(STG_POOL);
	RUN_INITCALLS(STG_REGISTER);
	RUN_INITCALLS(STG_INIT);

	init(argc, argv);
	signal_register_fct(SIGQUIT, dump, SIGQUIT);
	signal_register_fct(SIGUSR1, sig_soft_stop, SIGUSR1);
	signal_register_fct(SIGHUP, sig_dump_state, SIGHUP);
	signal_register_fct(SIGUSR2, NULL, 0);

	/* Always catch SIGPIPE even on platforms which define MSG_NOSIGNAL.
	 * Some recent FreeBSD setups report broken pipes, and MSG_NOSIGNAL
	 * was defined there, so let's stay on the safe side.
	 */
	signal_register_fct(SIGPIPE, NULL, 0);

	/* ulimits */
	if (!global.rlimit_nofile)
		global.rlimit_nofile = global.maxsock;

	if (global.rlimit_nofile) {
		limit.rlim_cur = global.rlimit_nofile;
		limit.rlim_max = MAX(rlim_fd_max_at_boot, limit.rlim_cur);

		if (setrlimit(RLIMIT_NOFILE, &limit) == -1) {
			/* try to set it to the max possible at least */
			getrlimit(RLIMIT_NOFILE, &limit);
			limit.rlim_cur = limit.rlim_max;
			if (setrlimit(RLIMIT_NOFILE, &limit) != -1)
				getrlimit(RLIMIT_NOFILE, &limit);

			ha_warning("[%s.main()] Cannot raise FD limit to %d, limit is %d.\n", argv[0], global.rlimit_nofile, (int)limit.rlim_cur);
			global.rlimit_nofile = limit.rlim_cur;
		}
	}

	if (global.rlimit_memmax) {
		limit.rlim_cur = limit.rlim_max =
			global.rlimit_memmax * 1048576ULL;
#ifdef RLIMIT_AS
		if (setrlimit(RLIMIT_AS, &limit) == -1) {
			ha_warning("[%s.main()] Cannot fix MEM limit to %d megs.\n",
				   argv[0], global.rlimit_memmax);
		}
#else
		if (setrlimit(RLIMIT_DATA, &limit) == -1) {
			ha_warning("[%s.main()] Cannot fix MEM limit to %d megs.\n",
				   argv[0], global.rlimit_memmax);
		}
#endif
	}

	if (old_unixsocket) {
		if (strcmp("/dev/null", old_unixsocket) != 0) {
			if (get_old_sockets(old_unixsocket) != 0) {
				ha_alert("Failed to get the sockets from the old process!\n");
				if (!(global.mode & MODE_MWORKER))
					exit(1);
			}
		}
	}
	get_cur_unixsocket();

	/* We will loop at most 100 times with 10 ms delay each time.
	 * That's at most 1 second. We only send a signal to old pids
	 * if we cannot grab at least one port.
	 */
	retry = MAX_START_RETRIES;
	err = ERR_NONE;
	while (retry >= 0) {
		struct timeval w;
		err = start_proxies(retry == 0 || nb_oldpids == 0);
		/* exit the loop on no error or fatal error */
		if ((err & (ERR_RETRYABLE|ERR_FATAL)) != ERR_RETRYABLE)
			break;
		if (nb_oldpids == 0 || retry == 0)
			break;

		/* FIXME-20060514: Solaris and OpenBSD do not support shutdown() on
		 * listening sockets. So on those platforms, it would be wiser to
		 * simply send SIGUSR1, which will not be undoable.
		 */
		if (tell_old_pids(SIGTTOU) == 0) {
			/* no need to wait if we can't contact old pids */
			retry = 0;
			continue;
		}
		/* give some time to old processes to stop listening */
		w.tv_sec = 0;
		w.tv_usec = 10*1000;
		select(0, NULL, NULL, NULL, &w);
		retry--;
	}

	/* Note: start_proxies() sends an alert when it fails. */
	if ((err & ~ERR_WARN) != ERR_NONE) {
		if (retry != MAX_START_RETRIES && nb_oldpids) {
			protocol_unbind_all(); /* cleanup everything we can */
			tell_old_pids(SIGTTIN);
		}
		exit(1);
	}

	if (!(global.mode & MODE_MWORKER_WAIT) && listeners == 0) {
		ha_alert("[%s.main()] No enabled listener found (check for 'bind' directives) ! Exiting.\n", argv[0]);
		/* Note: we don't have to send anything to the old pids because we
		 * never stopped them. */
		exit(1);
	}

	err = protocol_bind_all(errmsg, sizeof(errmsg));
	if ((err & ~ERR_WARN) != ERR_NONE) {
		if ((err & ERR_ALERT) || (err & ERR_WARN))
			ha_alert("[%s.main()] %s.\n", argv[0], errmsg);

		ha_alert("[%s.main()] Some protocols failed to start their listeners! Exiting.\n", argv[0]);
		protocol_unbind_all(); /* cleanup everything we can */
		if (nb_oldpids)
			tell_old_pids(SIGTTIN);
		exit(1);
	} else if (err & ERR_WARN) {
		ha_alert("[%s.main()] %s.\n", argv[0], errmsg);
	}
	/* Ok, all listener should now be bound, close any leftover sockets
	 * the previous process gave us, we don't need them anymore
	 */
	while (xfer_sock_list != NULL) {
		struct xfer_sock_list *tmpxfer = xfer_sock_list->next;
		close(xfer_sock_list->fd);
		free(xfer_sock_list->iface);
		free(xfer_sock_list->namespace);
		free(xfer_sock_list);
		xfer_sock_list = tmpxfer;
	}

	/* prepare pause/play signals */
	signal_register_fct(SIGTTOU, sig_pause, SIGTTOU);
	signal_register_fct(SIGTTIN, sig_listen, SIGTTIN);

	/* MODE_QUIET can inhibit alerts and warnings below this line */

	if (getenv("HAPROXY_MWORKER_REEXEC") != NULL) {
		/* either stdin/out/err are already closed or should stay as they are. */
		if ((global.mode & MODE_DAEMON)) {
			/* daemon mode re-executing, stdin/stdout/stderr are already closed so keep quiet */
			global.mode &= ~MODE_VERBOSE;
			global.mode |= MODE_QUIET; /* ensure that we won't say anything from now */
		}
	} else {
		if ((global.mode & MODE_QUIET) && !(global.mode & MODE_VERBOSE)) {
			/* detach from the tty */
			stdio_quiet(-1);
		}
	}

	/* open log & pid files before the chroot */
	if ((global.mode & MODE_DAEMON || global.mode & MODE_MWORKER) && global.pidfile != NULL) {
		unlink(global.pidfile);
		pidfd = open(global.pidfile, O_CREAT | O_WRONLY | O_TRUNC, 0644);
		if (pidfd < 0) {
			ha_alert("[%s.main()] Cannot create pidfile %s\n", argv[0], global.pidfile);
			if (nb_oldpids)
				tell_old_pids(SIGTTIN);
			protocol_unbind_all();
			exit(1);
		}
	}

	if ((global.last_checks & LSTCHK_NETADM) && global.uid) {
		ha_alert("[%s.main()] Some configuration options require full privileges, so global.uid cannot be changed.\n"
			 "", argv[0]);
		protocol_unbind_all();
		exit(1);
	}

	/* If the user is not root, we'll still let him try the configuration
	 * but we inform him that unexpected behaviour may occur.
	 */
	if ((global.last_checks & LSTCHK_NETADM) && getuid())
		ha_warning("[%s.main()] Some options which require full privileges"
			   " might not work well.\n"
			   "", argv[0]);

	if ((global.mode & (MODE_MWORKER|MODE_DAEMON)) == 0) {

		/* chroot if needed */
		if (global.chroot != NULL) {
			if (chroot(global.chroot) == -1 || chdir("/") == -1) {
				ha_alert("[%s.main()] Cannot chroot(%s).\n", argv[0], global.chroot);
				if (nb_oldpids)
					tell_old_pids(SIGTTIN);
				protocol_unbind_all();
				exit(1);
			}
		}
	}

	if (nb_oldpids && !(global.mode & MODE_MWORKER_WAIT))
		nb_oldpids = tell_old_pids(oldpids_sig);

	/* send a SIGTERM to workers who have a too high reloads number  */
	if ((global.mode & MODE_MWORKER) && !(global.mode & MODE_MWORKER_WAIT))
		mworker_kill_max_reloads(SIGTERM);

	/* Note that any error at this stage will be fatal because we will not
	 * be able to restart the old pids.
	 */

	if ((global.mode & (MODE_MWORKER|MODE_DAEMON)) == 0) {
		/* setgid / setuid */
		if (global.gid) {
			if (getgroups(0, NULL) > 0 && setgroups(0, NULL) == -1)
				ha_warning("[%s.main()] Failed to drop supplementary groups. Using 'gid'/'group'"
					   " without 'uid'/'user' is generally useless.\n", argv[0]);

			if (setgid(global.gid) == -1) {
				ha_alert("[%s.main()] Cannot set gid %d.\n", argv[0], global.gid);
				protocol_unbind_all();
				exit(1);
			}
		}

		if (global.uid && setuid(global.uid) == -1) {
			ha_alert("[%s.main()] Cannot set uid %d.\n", argv[0], global.uid);
			protocol_unbind_all();
			exit(1);
		}
	}

	/* check ulimits */
	limit.rlim_cur = limit.rlim_max = 0;
	getrlimit(RLIMIT_NOFILE, &limit);
	if (limit.rlim_cur < global.maxsock) {
		ha_warning("[%s.main()] FD limit (%d) too low for maxconn=%d/maxsock=%d. Please raise 'ulimit-n' to %d or more to avoid any trouble.\n",
			   argv[0], (int)limit.rlim_cur, global.maxconn, global.maxsock, global.maxsock);
	}

	if (global.mode & (MODE_DAEMON | MODE_MWORKER | MODE_MWORKER_WAIT)) {
		struct proxy *px;
		struct peers *curpeers;
		int ret = 0;
		int proc;
		int devnullfd = -1;

		/*
		 * if daemon + mworker: must fork here to let a master
		 * process live in background before forking children
		 */

		if ((getenv("HAPROXY_MWORKER_REEXEC") == NULL)
		    && (global.mode & MODE_MWORKER)
		    && (global.mode & MODE_DAEMON)) {
			ret = fork();
			if (ret < 0) {
				ha_alert("[%s.main()] Cannot fork.\n", argv[0]);
				protocol_unbind_all();
				exit(1); /* there has been an error */
			} else if (ret > 0) { /* parent leave to daemonize */
				exit(0);
			} else /* change the process group ID in the child (master process) */
				setsid();
		}


		/* if in master-worker mode, write the PID of the father */
		if (global.mode & MODE_MWORKER) {
			char pidstr[100];
			snprintf(pidstr, sizeof(pidstr), "%d\n", (int)getpid());
			if (pidfd >= 0)
				shut_your_big_mouth_gcc(write(pidfd, pidstr, strlen(pidstr)));
		}

		/* the father launches the required number of processes */
		if (!(global.mode & MODE_MWORKER_WAIT)) {
			if (global.mode & MODE_MWORKER)
				mworker_ext_launch_all();
			for (proc = 0; proc < global.nbproc; proc++) {
				ret = fork();
				if (ret < 0) {
					ha_alert("[%s.main()] Cannot fork.\n", argv[0]);
					protocol_unbind_all();
					exit(1); /* there has been an error */
				}
				else if (ret == 0) { /* child breaks here */
                                        /* This one must not be exported, it's internal! */
                                        unsetenv("HAPROXY_MWORKER_REEXEC");
					ha_random_jump96(relative_pid);
					break;
				}
				if (pidfd >= 0 && !(global.mode & MODE_MWORKER)) {
					char pidstr[100];
					snprintf(pidstr, sizeof(pidstr), "%d\n", ret);
					shut_your_big_mouth_gcc(write(pidfd, pidstr, strlen(pidstr)));
				}
				if (global.mode & MODE_MWORKER) {
					struct mworker_proc *child;

					ha_notice("New worker #%d (%d) forked\n", relative_pid, ret);
					/* find the right mworker_proc */
					list_for_each_entry(child, &proc_list, list) {
						if (child->relative_pid == relative_pid &&
						    child->reloads == 0 && child->options & PROC_O_TYPE_WORKER) {
							child->timestamp = now.tv_sec;
							child->pid = ret;
							child->version = strdup(haproxy_version);
							break;
						}
					}
				}

				relative_pid++; /* each child will get a different one */
				pid_bit <<= 1;
			}
		} else {
			/* wait mode */
			global.nbproc = 1;
			proc = 1;
		}

#ifdef USE_CPU_AFFINITY
		if (proc < global.nbproc &&  /* child */
		    proc < MAX_PROCS &&       /* only the first 32/64 processes may be pinned */
		    global.cpu_map.proc[proc])    /* only do this if the process has a CPU map */
#ifdef __FreeBSD__
		{
			cpuset_t cpuset;
			int i;
			unsigned long cpu_map = global.cpu_map.proc[proc];

			CPU_ZERO(&cpuset);
			while ((i = ffsl(cpu_map)) > 0) {
				CPU_SET(i - 1, &cpuset);
				cpu_map &= ~(1UL << (i - 1));
			}
			ret = cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, -1, sizeof(cpuset), &cpuset);
		}
#else
			sched_setaffinity(0, sizeof(unsigned long), (void *)&global.cpu_map.proc[proc]);
#endif
#endif
		/* close the pidfile both in children and father */
		if (pidfd >= 0) {
			//lseek(pidfd, 0, SEEK_SET);  /* debug: emulate eglibc bug */
			close(pidfd);
		}

		/* We won't ever use this anymore */
		free(global.pidfile); global.pidfile = NULL;

		if (proc == global.nbproc) {
			if (global.mode & (MODE_MWORKER|MODE_MWORKER_WAIT)) {

				if ((!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) &&
					(global.mode & MODE_DAEMON)) {
					/* detach from the tty, this is required to properly daemonize. */
					if ((getenv("HAPROXY_MWORKER_REEXEC") == NULL))
						stdio_quiet(-1);

					global.mode &= ~MODE_VERBOSE;
					global.mode |= MODE_QUIET; /* ensure that we won't say anything from now */
				}

				mworker_loop();
				/* should never get there */
				exit(EXIT_FAILURE);
			}
#if defined(USE_OPENSSL) && !defined(OPENSSL_NO_DH)
			ssl_free_dh();
#endif
			exit(0); /* parent must leave */
		}

		/* child must never use the atexit function */
		atexit_flag = 0;

		/* close useless master sockets */
		if (global.mode & MODE_MWORKER) {
			struct mworker_proc *child, *it;
			master = 0;

			mworker_cli_proxy_stop();

			/* free proc struct of other processes  */
			list_for_each_entry_safe(child, it, &proc_list, list) {
				/* close the FD of the master side for all
				 * workers, we don't need to close the worker
				 * side of other workers since it's done with
				 * the bind_proc */
				if (child->ipc_fd[0] >= 0)
					close(child->ipc_fd[0]);
				if (child->relative_pid == relative_pid &&
				    child->reloads == 0) {
					/* keep this struct if this is our pid */
					proc_self = child;
					continue;
				}
				LIST_DEL(&child->list);
				mworker_free_child(child);
				child = NULL;
			}
		}

		if (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE)) {
			devnullfd = open("/dev/null", O_RDWR, 0);
			if (devnullfd < 0) {
				ha_alert("Cannot open /dev/null\n");
				exit(EXIT_FAILURE);
			}
		}

		/* Must chroot and setgid/setuid in the children */
		/* chroot if needed */
		if (global.chroot != NULL) {
			if (chroot(global.chroot) == -1 || chdir("/") == -1) {
				ha_alert("[%s.main()] Cannot chroot(%s).\n", argv[0], global.chroot);
				if (nb_oldpids)
					tell_old_pids(SIGTTIN);
				protocol_unbind_all();
				exit(1);
			}
		}

		free(global.chroot);
		global.chroot = NULL;

		/* setgid / setuid */
		if (global.gid) {
			if (getgroups(0, NULL) > 0 && setgroups(0, NULL) == -1)
				ha_warning("[%s.main()] Failed to drop supplementary groups. Using 'gid'/'group'"
					   " without 'uid'/'user' is generally useless.\n", argv[0]);

			if (setgid(global.gid) == -1) {
				ha_alert("[%s.main()] Cannot set gid %d.\n", argv[0], global.gid);
				protocol_unbind_all();
				exit(1);
			}
		}

		if (global.uid && setuid(global.uid) == -1) {
			ha_alert("[%s.main()] Cannot set uid %d.\n", argv[0], global.uid);
			protocol_unbind_all();
			exit(1);
		}

		/* pass through every cli socket, and check if it's bound to
		 * the current process and if it exposes listeners sockets.
		 * Caution: the GTUNE_SOCKET_TRANSFER is now set after the fork.
		 * */

		if (global.stats_fe) {
			struct bind_conf *bind_conf;

			list_for_each_entry(bind_conf, &global.stats_fe->conf.bind, by_fe) {
				if (bind_conf->level & ACCESS_FD_LISTENERS) {
					if (!bind_conf->bind_proc || bind_conf->bind_proc & (1UL << proc)) {
						global.tune.options |= GTUNE_SOCKET_TRANSFER;
						break;
					}
				}
			}
		}

		/* we might have to unbind some proxies from some processes */
		px = proxies_list;
		while (px != NULL) {
			if (px->bind_proc && px->state != PR_STSTOPPED) {
				if (!(px->bind_proc & (1UL << proc))) {
					if (global.tune.options & GTUNE_SOCKET_TRANSFER)
						zombify_proxy(px);
					else
						stop_proxy(px);
				}
			}
			px = px->next;
		}

		/* we might have to unbind some peers sections from some processes */
		for (curpeers = cfg_peers; curpeers; curpeers = curpeers->next) {
			if (!curpeers->peers_fe)
				continue;

			if (curpeers->peers_fe->bind_proc & (1UL << proc))
				continue;

			stop_proxy(curpeers->peers_fe);
			/* disable this peer section so that it kills itself */
			signal_unregister_handler(curpeers->sighandler);
			task_destroy(curpeers->sync_task);
			curpeers->sync_task = NULL;
			task_destroy(curpeers->peers_fe->task);
			curpeers->peers_fe->task = NULL;
			curpeers->peers_fe = NULL;
		}

		/*
		 * This is only done in daemon mode because we might want the
		 * logs on stdout in mworker mode. If we're NOT in QUIET mode,
		 * we should now close the 3 first FDs to ensure that we can
		 * detach from the TTY. We MUST NOT do it in other cases since
		 * it would have already be done, and 0-2 would have been
		 * affected to listening sockets
		 */
		if ((global.mode & MODE_DAEMON) &&
		    (!(global.mode & MODE_QUIET) || (global.mode & MODE_VERBOSE))) {
			/* detach from the tty */
			stdio_quiet(devnullfd);
			global.mode &= ~MODE_VERBOSE;
			global.mode |= MODE_QUIET; /* ensure that we won't say anything from now */
		}
		pid = getpid(); /* update child's pid */
		if (!(global.mode & MODE_MWORKER)) /* in mworker mode we don't want a new pgid for the children */
			setsid();
		fork_poller();
	}

	/* try our best to re-enable core dumps depending on system capabilities.
	 * What is addressed here :
	 *   - remove file size limits
	 *   - remove core size limits
	 *   - mark the process dumpable again if it lost it due to user/group
	 */
	if (global.tune.options & GTUNE_SET_DUMPABLE) {
		limit.rlim_cur = limit.rlim_max = RLIM_INFINITY;

#if defined(RLIMIT_FSIZE)
		if (setrlimit(RLIMIT_FSIZE, &limit) == -1)
			ha_warning("[%s.main()] Failed to set the raise the maximum file size.\n", argv[0]);
#endif

#if defined(RLIMIT_CORE)
		if (setrlimit(RLIMIT_CORE, &limit) == -1)
			ha_warning("[%s.main()] Failed to set the raise the core dump size.\n", argv[0]);
#endif

#if defined(USE_PRCTL)
		if (prctl(PR_SET_DUMPABLE, 1, 0, 0, 0) == -1)
			ha_warning("[%s.main()] Failed to set the dumpable flag, no core will be dumped.\n", argv[0]);
#endif
	}

	global.mode &= ~MODE_STARTING;
	/*
	 * That's it : the central polling loop. Run until we stop.
	 */
#ifdef USE_THREAD
	{
		sigset_t     blocked_sig, old_sig;
		int          i;

		/* ensure the signals will be blocked in every thread */
		sigfillset(&blocked_sig);
		sigdelset(&blocked_sig, SIGPROF);
		sigdelset(&blocked_sig, SIGBUS);
		sigdelset(&blocked_sig, SIGFPE);
		sigdelset(&blocked_sig, SIGILL);
		sigdelset(&blocked_sig, SIGSEGV);
		pthread_sigmask(SIG_SETMASK, &blocked_sig, &old_sig);

		/* Create nbthread-1 thread. The first thread is the current process */
		thread_info[0].pthread = pthread_self();
		for (i = 1; i < global.nbthread; i++)
			pthread_create(&thread_info[i].pthread, NULL, &run_thread_poll_loop, (void *)(long)i);

#ifdef USE_CPU_AFFINITY
		/* Now the CPU affinity for all threads */

		/* If on multiprocess, use proc_t1 except for the first process.
		 */
		if ((relative_pid - 1) > 0)
			global.cpu_map.thread[0] = global.cpu_map.proc_t1[relative_pid-1];

		for (i = 0; i < global.nbthread; i++) {
			if (global.cpu_map.proc[relative_pid-1])
				global.cpu_map.thread[i] &= global.cpu_map.proc[relative_pid-1];

			if (i < MAX_THREADS &&       /* only the first 32/64 threads may be pinned */
			    global.cpu_map.thread[i]) {/* only do this if the thread has a THREAD map */
#if defined(__FreeBSD__) || defined(__NetBSD__)
				cpuset_t cpuset;
#else
				cpu_set_t cpuset;
#endif
				int j;
				unsigned long cpu_map = global.cpu_map.thread[i];

				CPU_ZERO(&cpuset);

				while ((j = ffsl(cpu_map)) > 0) {
					CPU_SET(j - 1, &cpuset);
					cpu_map &= ~(1UL << (j - 1));
				}
				pthread_setaffinity_np(thread_info[i].pthread,
						       sizeof(cpuset), &cpuset);
			}
		}
#endif /* !USE_CPU_AFFINITY */

		/* when multithreading we need to let only the thread 0 handle the signals */
		haproxy_unblock_signals();

		/* Finally, start the poll loop for the first thread */
		run_thread_poll_loop(0);

		/* Wait the end of other threads */
		for (i = 1; i < global.nbthread; i++)
			pthread_join(thread_info[i].pthread, NULL);

#if defined(DEBUG_THREAD) || defined(DEBUG_FULL)
		show_lock_stats();
#endif
	}
#else /* ! USE_THREAD */
	haproxy_unblock_signals();
	run_thread_poll_loop(0);
#endif

	/* Do some cleanup */
	deinit();

	exit(0);
}


/*
 * Local variables:
 *  c-indent-level: 8
 *  c-basic-offset: 8
 * End:
 */