main.c
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main.c
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	/*
	* Copyright (C) 2011 Jiaju Zhang <jjzhang@suse.de>
	* Copyright (C) 2013-2014 Philipp Marek <philipp.marek@linbit.com>
	*
	* 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.
	*
	* This software is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	* General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License along
	* with this program; if not, write to the Free Software Foundation, Inc.,
	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	*/

	#include "b_config.h"

	#include <stdio.h>
	#include <unistd.h>
	#include <stdlib.h>
	#include <sched.h>
	#include <errno.h>
	#include <limits.h>
	#include <sys/file.h>
	#include <sys/types.h>
	#include <sys/stat.h>
	#include <sys/mman.h>
	#include <sys/time.h>
	#include <sys/resource.h>
	#include <sys/socket.h>
	#include <sys/un.h>
	#include <sys/poll.h>
	#include <sys/wait.h>
	#include <fcntl.h>
	#include <string.h>
	#include <ctype.h>
	#include <assert.h>
	#include <signal.h>
	#include <netdb.h>
	#include <arpa/inet.h>
	#include <sys/types.h>

	#include <crm/services.h>

	#if HAVE_LIBGNUTLS
	#include <gnutls/gnutls.h>
	#endif
	#if HAVE_LIBGCRYPT
	#include <gcrypt.h>
	#endif
	#ifndef NAMETAG_LIBSYSTEMD
	#include <clplumbing/setproctitle.h>
	#else
	#include "alt/nametag_libsystemd.h"
	#endif
	#ifdef COREDUMP_NURSING
	#include <sys/prctl.h>
	#include <clplumbing/coredumps.h>
	#endif
	#include "log.h"
	#include "booth.h"
	#include "config.h"
	#include "transport.h"
	#include "inline-fn.h"
	#include "pacemaker.h"
	#include "ticket.h"
	#include "request.h"
	#include "attr.h"
	#include "handler.h"

	#define RELEASE_STR VERSION

	#define CLIENT_NALLOC 32

	static int daemonize = 1;
	int enable_stderr = 0;
	timetype start_time;


	/** Structure for "clients".
	* Filehandles with incoming data get registered here (and in pollfds),
	* along with their callbacks.
	* Because these can be reallocated with every new fd, addressing
	* happens _only_ by their numeric index. */
	struct client *clients = NULL;
	struct pollfd *pollfds = NULL;
	static int client_maxi;
	static int client_size = 0;


	static const struct booth_site _no_leader = {
	.addr_string = "none",
	.site_id = NO_ONE,
	.index = -1,
	};
	struct booth_site const no_leader = (struct booth_site) &_no_leader;

	typedef enum
	{
	BOOTHD_STARTED=0,
	BOOTHD_STARTING
	} BOOTH_DAEMON_STATE;

	int poll_timeout;



	struct booth_config *booth_conf;
	struct command_line cl;

	/*
	* Global signal handlers variables
	*/
	static int sig_exit_handler_called = 0;
	static int sig_exit_handler_sig = 0;
	static int sig_usr1_handler_called = 0;
	static int sig_chld_handler_called = 0;

	static const char *state_string(BOOTH_DAEMON_STATE st)
	{
	if (st == BOOTHD_STARTED) {
	return "started";
	} else if (st == BOOTHD_STARTING) {
	return "starting";
	} else {
	return "invalid";
	}
	}

	static void client_alloc(void)
	{
	int i;

	if (!(clients = realloc(
	clients, (client_size + CLIENT_NALLOC) * sizeof(*clients))
	) \|\| !(pollfds = realloc(
	pollfds, (client_size + CLIENT_NALLOC) * sizeof(*pollfds))
	)) {
	log_error("can't alloc for client array");
	exit(1);
	}

	for (i = client_size; i < client_size + CLIENT_NALLOC; i++) {
	clients[i].workfn = NULL;
	clients[i].deadfn = NULL;
	clients[i].fd = -1;
	pollfds[i].fd = -1;
	pollfds[i].revents = 0;
	}
	client_size += CLIENT_NALLOC;
	}

	static void client_dead(int ci)
	{
	struct client *c = clients + ci;

	if (c->fd != -1) {
	log_debug("removing client %d", c->fd);
	close(c->fd);
	}

	c->fd = -1;
	c->workfn = NULL;

	if (c->msg) {
	free(c->msg);
	c->msg = NULL;
	c->offset = 0;
	}

	pollfds[ci].fd = -1;
	}

	int client_add(int fd, const struct booth_transport *tpt,
	workfn_t workfn, void (*deadfn)(int ci))
	{
	int i;
	struct client *c;


	if (client_size - 1 <= client_maxi ) {
	client_alloc();
	}

	for (i = 0; i < client_size; i++) {
	c = clients + i;
	if (c->fd != -1)
	continue;

	c->workfn = workfn;
	if (deadfn)
	c->deadfn = deadfn;
	else
	c->deadfn = client_dead;

	c->transport = tpt;
	c->fd = fd;
	c->msg = NULL;
	c->offset = 0;

	pollfds[i].fd = fd;
	pollfds[i].events = POLLIN;
	if (i > client_maxi)
	client_maxi = i;

	return i;
	}

	assert(!"no client");
	}

	int find_client_by_fd(int fd)
	{
	int i;

	if (fd < 0)
	return -1;

	for (i = 0; i <= client_maxi; i++) {
	if (clients[i].fd == fd)
	return i;
	}
	return -1;
	}

	static int format_peers(char *pdata, unsigned int len)
	{
	struct booth_site *s;
	char data, cp;
	char time_str[64];
	int i, alloc;

	*pdata = NULL;
	*len = 0;

	alloc = booth_conf->site_count * (BOOTH_NAME_LEN + 256);
	data = malloc(alloc);
	if (!data)
	return -ENOMEM;

	cp = data;
	_FOREACH_NODE(i, s) {
	if (s == local)
	continue;
	strftime(time_str, sizeof(time_str), "%F %T",
	localtime(&s->last_recv));
	cp += snprintf(cp,
	alloc - (cp - data),
	"%-12s %s, last recv: %s\n",
	type_to_string(s->type),
	s->addr_string,
	time_str);
	cp += snprintf(cp,
	alloc - (cp - data),
	"\tSent pkts:%u error:%u resends:%u\n",
	s->sent_cnt,
	s->sent_err_cnt,
	s->resend_cnt);
	cp += snprintf(cp,
	alloc - (cp - data),
	"\tRecv pkts:%u error:%u authfail:%u invalid:%u\n\n",
	s->recv_cnt,
	s->recv_err_cnt,
	s->sec_cnt,
	s->invalid_cnt);
	if (alloc - (cp - data) <= 0) {
	free(data);
	return -ENOMEM;
	}
	}

	*pdata = data;
	*len = cp - data;

	return 0;
	}


	void list_peers(struct booth_config *conf, int fd)
	{
	char *data;
	unsigned int olen;
	struct boothc_hdr_msg hdr;

	if (format_peers(&data, &olen) < 0) {
	goto out;
	}

	init_header(&hdr.header, CL_LIST, 0, 0, RLT_SUCCESS, 0, sizeof(hdr) + olen);
	send_header_plus(conf, fd, &hdr, data, olen);

	out:
	if (data) {
	free(data);
	}
	}

	/* trim trailing spaces if the key is ascii
	*/
	static void trim_key()
	{
	char *p;
	int i;

	for (i=0, p=booth_conf->authkey; i < booth_conf->authkey_len; i++, p++)
	if (!isascii(*p))
	return;

	p = booth_conf->authkey;
	while (booth_conf->authkey_len > 0 && isspace(*p)) {
	p++;
	booth_conf->authkey_len--;
	}
	memmove(booth_conf->authkey, p, booth_conf->authkey_len);

	p = booth_conf->authkey + booth_conf->authkey_len - 1;
	while (booth_conf->authkey_len > 0 && isspace(*p)) {
	booth_conf->authkey_len--;
	p--;
	}
	}

	static int read_authkey()
	{
	int fd;

	booth_conf->authkey[0] = '\0';
	fd = open(booth_conf->authfile, O_RDONLY);
	if (fd < 0) {
	log_error("cannot open %s: %s",
	booth_conf->authfile, strerror(errno));
	return -1;
	}
	if (fstat(fd, &booth_conf->authstat) < 0) {
	log_error("cannot stat authentication file %s (%d): %s",
	booth_conf->authfile, fd, strerror(errno));
	close(fd);
	return -1;
	}
	if (booth_conf->authstat.st_mode & (S_IRGRP \| S_IROTH)) {
	log_error("%s: file shall not be readable for anyone but the owner",
	booth_conf->authfile);
	close(fd);
	return -1;
	}
	booth_conf->authkey_len = read(fd, booth_conf->authkey, BOOTH_MAX_KEY_LEN);
	close(fd);
	trim_key();
	log_debug("read key of size %d in authfile %s",
	booth_conf->authkey_len, booth_conf->authfile);
	/* make sure that the key is of minimum length */
	return (booth_conf->authkey_len >= BOOTH_MIN_KEY_LEN) ? 0 : -1;
	}

	int update_authkey()
	{
	struct stat statbuf;

	if (stat(booth_conf->authfile, &statbuf) < 0) {
	log_error("cannot stat authentication file %s: %s",
	booth_conf->authfile, strerror(errno));
	return -1;
	}
	if (statbuf.st_mtime > booth_conf->authstat.st_mtime) {
	return read_authkey();
	}
	return 0;
	}

	static int setup_config(struct booth_config **conf, int type)
	{
	int rv;

	assert(conf != NULL);

	rv = read_config(conf, cl.configfile, type);
	if (rv < 0) {
	goto out;
	}

	if (booth_conf->authfile[0] != '\0') {
	rv = read_authkey();
	if (rv < 0)
	goto out;
	#if HAVE_LIBGCRYPT
	if (!gcry_check_version(NULL)) {
	log_error("gcry_check_version");
	rv = -ENOENT;
	goto out;
	}
	gcry_control(GCRYCTL_DISABLE_SECMEM, 0);
	gcry_control(GCRYCTL_INITIALIZATION_FINISHED, 0);
	#endif
	#if HAVE_LIBGNUTLS
	if (gnutls_global_init() != 0) {
	log_error("Cannot initialize GnuTLS");
	rv = -EINVAL;
	goto out;
	};
	#endif
	}

	/* Set "local" pointer, ignoring errors. */
	if (cl.type == DAEMON && cl.site[0]) {
	if (!find_site_by_name(booth_conf, cl.site, &local, 1)) {
	log_error("Cannot find \"%s\" in the configuration.",
	cl.site);
	return -EINVAL;
	}
	local->local = 1;
	} else {
	find_myself(booth_conf, NULL, type == CLIENT \|\| type == GEOSTORE);
	}

	rv = check_config(booth_conf, type);
	if (rv < 0)
	goto out;


	/* Per default the PID file name is derived from the
	* configuration name. */
	if (!cl.lockfile[0]) {
	snprintf(cl.lockfile, sizeof(cl.lockfile) - 1,
	"%s/%s.pid", BOOTH_RUN_DIR, (*conf)->name);
	}

	out:
	return rv;
	}

	static int setup_transport(void)
	{
	int rv;

	rv = transport()->init(message_recv);
	if (rv < 0) {
	log_error("failed to init booth_transport %s", transport()->name);
	goto out;
	}

	rv = booth_transport[TCP].init(NULL);
	if (rv < 0) {
	log_error("failed to init booth_transport[TCP]");
	goto out;
	}

	out:
	return rv;
	}


	static int write_daemon_state(int fd, int state)
	{
	char *buffer;
	int rv, size;

	rv = asprintf(&buffer, "booth_pid=%d booth_state=%s booth_type=%s "
	"booth_cfg_name='%s' booth_id=%d "
	"booth_addr_string='%s' booth_port=%d\n",
	getpid(), state_string(state), type_to_string(local->type),
	booth_conf->name, get_local_id(), site_string(local),
	site_port(local));

	if (rv < 0) {
	log_error("Buffer write failed in write_daemon_state().");
	return -1;
	}

	size = rv;

	rv = ftruncate(fd, 0);
	if (rv < 0) {
	log_error("lockfile %s truncate error %d: %s",
	cl.lockfile, errno, strerror(errno));
	free(buffer);
	return rv;
	}

	rv = lseek(fd, 0, SEEK_SET);
	if (rv < 0) {
	log_error("lseek set fd(%d) offset to 0 error, return(%d), message(%s)",
	fd, rv, strerror(errno));
	free(buffer);
	return -1;
	}

	rv = write(fd, buffer, size);

	if (rv != size) {
	log_error("write to fd(%d, %d) returned %d, errno %d, message(%s)",
	fd, size, rv, errno, strerror(errno));
	free(buffer);
	return -1;
	}

	free(buffer);
	return 0;
	}

	static int process_signals(void)
	{
	if (sig_exit_handler_called) {
	log_info("caught signal %d", sig_exit_handler_sig);
	return 1;
	}
	if (sig_usr1_handler_called) {
	sig_usr1_handler_called = 0;
	tickets_log_info(booth_conf);
	}
	if (sig_chld_handler_called) {
	sig_chld_handler_called = 0;
	wait_child(SIGCHLD);
	}

	return 0;
	}

	static int loop(int fd)
	{
	workfn_t workfn;
	void (*deadfn) (int ci);
	int rv, i;

	rv = setup_transport();
	if (rv < 0)
	goto fail;

	rv = setup_ticket(booth_conf);
	if (rv < 0) {
	goto fail;
	}

	rv = write_daemon_state(fd, BOOTHD_STARTED);
	if (rv != 0) {
	log_error("write daemon state %d to lockfile error %s: %s",
	BOOTHD_STARTED, cl.lockfile, strerror(errno));
	goto fail;
	}

	log_info("BOOTH %s daemon started, node id is 0x%08X (%d).",
	type_to_string(local->type),
	local->site_id, local->site_id);

	while (1) {
	rv = poll(pollfds, client_maxi + 1, poll_timeout);
	if (rv == -1 && errno == EINTR)
	continue;
	if (rv < 0) {
	log_error("poll failed: %s (%d)", strerror(errno), errno);
	goto fail;
	}

	for (i = 0; i <= client_maxi; i++) {
	if (clients[i].fd < 0)
	continue;

	if (pollfds[i].revents & POLLIN) {
	workfn = clients[i].workfn;
	if (workfn) {
	workfn(booth_conf, i);
	}
	}
	if (pollfds[i].revents &
	(POLLERR \| POLLHUP \| POLLNVAL)) {
	deadfn = clients[i].deadfn;
	if (deadfn)
	deadfn(i);
	}
	}

	process_tickets(booth_conf);

	if (process_signals() != 0) {
	return 0;
	}
	}

	return 0;

	fail:
	return -1;
	}


	static int test_reply(cmd_result_t reply_code, cmd_request_t cmd)
	{
	int rv = 0;
	const char *op_str = NULL;

	if (cmd == CMD_GRANT)
	op_str = "grant";
	else if (cmd == CMD_REVOKE)
	op_str = "revoke";
	else if (cmd == CMD_LIST)
	op_str = "list";
	else if (cmd == CMD_PEERS)
	op_str = "peers";
	else {
	log_error("internal error reading reply result!");
	return -1;
	}

	switch (reply_code) {
	case RLT_OVERGRANT:
	log_info("You're granting a granted ticket. "
	"If you wanted to migrate a ticket, "
	"use revoke first, then use grant.");
	rv = -1;
	break;

	case RLT_TICKET_IDLE:
	log_info("ticket is not owned");
	rv = 0;
	break;

	case RLT_ASYNC:
	log_info("%s command sent, result will be returned "
	"asynchronously. Please use \"booth list\" to "
	"see the outcome.", op_str);
	rv = 0;
	break;

	case RLT_CIB_PENDING:
	log_info("%s succeeded (CIB commit pending)", op_str);
	/* wait for the CIB commit? */
	rv = (cl.options & OPT_WAIT_COMMIT) ? 3 : 0;
	break;

	case RLT_MORE:
	rv = 2;
	break;

	case RLT_SYNC_SUCC:
	case RLT_SUCCESS:
	if (cmd != CMD_LIST && cmd != CMD_PEERS)
	log_info("%s succeeded!", op_str);
	rv = 0;
	break;

	case RLT_SYNC_FAIL:
	log_info("%s failed!", op_str);
	rv = -1;
	break;

	case RLT_INVALID_ARG:
	log_error("ticket \"%s\" does not exist",
	cl.msg.ticket.id);
	rv = -1;
	break;

	case RLT_AUTH:
	log_error("authentication error");
	rv = -1;
	break;

	case RLT_EXT_FAILED:
	log_error("before-acquire-handler for ticket \"%s\" failed, grant denied",
	cl.msg.ticket.id);
	rv = -1;
	break;

	case RLT_ATTR_PREREQ:
	log_error("attr-prereq for ticket \"%s\" failed, grant denied",
	cl.msg.ticket.id);
	rv = -1;
	break;

	case RLT_REDIRECT:
	/* talk to another site */
	rv = 1;
	break;

	default:
	log_error("got an error code: %x", rv);
	rv = -1;
	}
	return rv;
	}

	static int query_get_string_answer(cmd_request_t cmd)
	{
	struct booth_site *site;
	struct boothc_hdr_msg reply;
	struct boothc_header *header;
	char *data;
	int data_len;
	int rv;
	struct booth_transport const *tpt;
	int (*test_reply_f) (cmd_result_t reply_code, cmd_request_t cmd);
	size_t msg_size;
	void *request;

	if (cl.type == GEOSTORE) {
	test_reply_f = test_attr_reply;
	msg_size = sizeof(cl.attr_msg);
	request = &cl.attr_msg;
	} else {
	test_reply_f = test_reply;
	msg_size = sizeof(cl.msg);
	request = &cl.msg;
	}
	header = (struct boothc_header *)request;
	data = NULL;

	init_header(header, cmd, 0, cl.options, 0, 0, msg_size);

	if (!*cl.site)
	site = local;
	else if (!find_site_by_name(booth_conf, cl.site, &site, 1)) {
	log_error("cannot find site \"%s\"", cl.site);
	rv = ENOENT;
	goto out;
	}

	tpt = booth_transport + TCP;
	rv = tpt->open(site);
	if (rv < 0)
	goto out_close;

	rv = tpt->send(booth_conf, site, request, msg_size);
	if (rv < 0)
	goto out_close;

	rv = tpt->recv_auth(booth_conf, site, &reply, sizeof(reply));
	if (rv < 0)
	goto out_close;

	data_len = ntohl(reply.header.length) - rv;

	/* no attribute, or no ticket found */
	if (!data_len) {
	goto out_test_reply;
	}

	data = malloc(data_len+1);
	if (!data) {
	rv = -ENOMEM;
	goto out_close;
	}
	rv = tpt->recv(site, data, data_len);
	if (rv < 0)
	goto out_close;

	*(data + data_len) = '\0';
	(void)fputs(data, stdout);
	fflush(stdout);

	out_test_reply:
	rv = test_reply_f(ntohl(reply.header.result), cmd);
	out_close:
	tpt->close(site);
	out:
	if (data)
	free(data);
	return rv;
	}


	static int do_command(cmd_request_t cmd)
	{
	struct booth_site *site;
	struct boothc_ticket_msg reply;
	struct booth_transport const *tpt;
	uint32_t leader_id;
	int rv;
	int reply_cnt = 0, msg_logged = 0;
	const char *op_str = "";

	if (cmd == CMD_GRANT)
	op_str = "grant";
	else if (cmd == CMD_REVOKE)
	op_str = "revoke";

	rv = -1;
	site = NULL;

	/* Always use TCP for client - at least for now. */
	tpt = booth_transport + TCP;

	if (!*cl.site)
	site = local;
	else {
	if (!find_site_by_name(booth_conf, cl.site, &site, 1)) {
	log_error("Site \"%s\" not configured.", cl.site);
	goto out_close;
	}
	}

	if (site->type == ARBITRATOR) {
	if (site == local) {
	log_error("We're just an arbitrator, cannot grant/revoke tickets here.");
	} else {
	log_error("%s is just an arbitrator, cannot grant/revoke tickets there.", cl.site);
	}
	goto out_close;
	}

	assert(site->type == SITE);

	/* We don't check for existence of ticket, so that asking can be
	* done without local configuration, too.
	* Although, that means that the UDP port has to be specified, too. */
	if (!cl.msg.ticket.id[0]) {
	/* If the loaded configuration has only a single ticket defined, use that. */
	if (booth_conf->ticket_count == 1) {
	strncpy(cl.msg.ticket.id, booth_conf->ticket[0].name,
	sizeof(cl.msg.ticket.id));
	} else {
	log_error("No ticket given.");
	goto out_close;
	}
	}

	redirect:
	init_header(&cl.msg.header, cmd, 0, cl.options, 0, 0, sizeof(cl.msg));

	rv = tpt->open(site);
	if (rv < 0)
	goto out_close;

	rv = tpt->send(booth_conf, site, &cl.msg, sendmsglen(&cl.msg));
	if (rv < 0) {
	goto out_close;
	}

	read_more:
	rv = tpt->recv_auth(booth_conf, site, &reply, sizeof(reply));
	if (rv < 0) {
	/* print any errors depending on the code sent by the
	* server */
	(void)test_reply(ntohl(reply.header.result), cmd);
	goto out_close;
	}

	rv = test_reply(ntohl(reply.header.result), cmd);
	if (rv == 1) {
	tpt->close(site);
	leader_id = ntohl(reply.ticket.leader);
	if (!find_site_by_id(booth_conf, leader_id, &site)) {
	log_error("Message with unknown redirect site %x received", leader_id);
	rv = -1;
	goto out_close;
	}
	goto redirect;
	} else if (rv == 2 \|\| rv == 3) {
	/* the server has more to say */
	/* don't wait too long */
	if (reply_cnt > 1 && !(cl.options & OPT_WAIT)) {
	rv = 0;
	log_info("Giving up on waiting for the definite result. "
	"Please use \"booth list\" later to "
	"see the outcome.");
	goto out_close;
	}
	if (reply_cnt == 0) {
	log_info("%s request sent, "
	"waiting for the result ...", op_str);
	msg_logged++;
	} else if (rv == 3 && msg_logged < 2) {
	log_info("waiting for the CIB commit ...");
	msg_logged++;
	}
	reply_cnt++;
	goto read_more;
	}

	out_close:
	if (site)
	tpt->close(site);
	return rv;
	}



	static int _lockfile(int mode, int fdp, pid_t locked_by)
	{
	struct flock lock;
	int fd, rv;


	/* After reboot the directory may not yet exist.
	* Try to create it, but ignore errors. */
	if (strncmp(cl.lockfile, BOOTH_RUN_DIR,
	strlen(BOOTH_RUN_DIR)) == 0)
	(void)mkdir(BOOTH_RUN_DIR, 0775);


	if (locked_by)
	*locked_by = 0;

	*fdp = -1;
	fd = open(cl.lockfile, mode, 0664);
	if (fd < 0)
	return errno;

	*fdp = fd;

	lock.l_type = F_WRLCK;
	lock.l_start = 0;
	lock.l_whence = SEEK_SET;
	lock.l_len = 0;
	lock.l_pid = 0;


	if (fcntl(fd, F_SETLK, &lock) == 0)
	return 0;

	rv = errno;

	if (locked_by)
	if (fcntl(fd, F_GETLK, &lock) == 0)
	*locked_by = lock.l_pid;

	return rv;
	}


	static inline int is_root(void)
	{
	return geteuid() == 0;
	}


	static int create_lockfile(void)
	{
	int rv, fd;

	fd = -1;
	rv = _lockfile(O_CREAT \| O_WRONLY, &fd, NULL);

	if (fd == -1) {
	log_error("lockfile %s open error %d: %s",
	cl.lockfile, rv, strerror(rv));
	return -1;
	}

	if (rv < 0) {
	log_error("lockfile %s setlk error %d: %s",
	cl.lockfile, rv, strerror(rv));
	goto fail;
	}

	rv = write_daemon_state(fd, BOOTHD_STARTING);
	if (rv != 0) {
	log_error("write daemon state %d to lockfile error %s: %s",
	BOOTHD_STARTING, cl.lockfile, strerror(errno));
	goto fail;
	}

	if (is_root()) {
	if (fchown(fd, booth_conf->uid, booth_conf->gid) < 0)
	log_error("fchown() on lockfile said %d: %s",
	errno, strerror(errno));
	}

	return fd;

	fail:
	close(fd);
	return -1;
	}

	static void unlink_lockfile(int fd)
	{
	unlink(cl.lockfile);
	close(fd);
	}

	static void print_usage(void)
	{
	printf(
	"Usage:\n"
	" booth list [options]\n"
	" booth {grant\|revoke} [options] <ticket>\n"
	" booth status [options]\n"
	"\n"
	" list: List all tickets\n"
	" grant: Grant ticket to site\n"
	" revoke: Revoke ticket\n"
	"\n"
	"Options:\n"
	" -c FILE Specify config file [default " BOOTH_DEFAULT_CONF "]\n"
	" Can be a path or just a name without \".conf\" suffix\n"
	" -s <site> Connect/grant to a different site\n"
	" -F Try to grant the ticket immediately\n"
	" even if not all sites are reachable\n"
	" For manual tickets:\n"
	" grant a manual ticket even if it has been already granted\n"
	" -w Wait forever for the outcome of the request\n"
	" -C Wait until the ticket is committed to the CIB (grant only)\n"
	" -h Print this help\n"
	"\n"
	"Examples:\n"
	"\n"
	" # booth list (list tickets)\n"
	" # booth grant ticket-A (grant ticket here)\n"
	" # booth grant -s 10.121.8.183 ticket-A (grant ticket to site 10.121.8.183)\n"
	" # booth revoke ticket-A (revoke ticket)\n"
	"\n"
	"See the booth(8) man page for more details.\n"
	);
	}

	#define OPTION_STRING "c:Dl:t:s:FhSwC"
	#define ATTR_OPTION_STRING "c:Dt:s:h"

	void safe_copy(char dest, char value, size_t buflen, const char *description) {
	int content_len = buflen - 1;

	if (strlen(value) >= content_len) {
	fprintf(stderr, "'%s' exceeds maximum %s length of %d\n",
	value, description, content_len);
	exit(EXIT_FAILURE);
	}
	strncpy(dest, value, content_len);
	dest[content_len] = 0;
	}

	static int host_convert(char hostname, char ip_str, size_t ip_size)
	{
	struct addrinfo *result = NULL, hints = {0};
	int re = -1;

	memset(&hints, 0, sizeof(hints));
	hints.ai_family = AF_INET;
	hints.ai_socktype = SOCK_DGRAM;

	re = getaddrinfo(hostname, NULL, &hints, &result);

	if (re == 0) {
	struct in_addr addr = ((struct sockaddr_in *)result->ai_addr)->sin_addr;
	const char *re_ntop = inet_ntop(AF_INET, &addr, ip_str, ip_size);
	if (re_ntop == NULL) {
	re = -1;
	}
	}

	freeaddrinfo(result);
	return re;
	}

	#define cparg(dest, descr) do { \
	if (optind >= argc) \
	goto missingarg; \
	safe_copy(dest, argv[optind], sizeof(dest), descr); \
	optind++; \
	} while(0)

	static int read_arguments(int argc, char **argv)
	{
	int optchar;
	char *arg1 = argv[1];
	char *op = NULL;
	char *cp;
	const char *opt_string = OPTION_STRING;
	char site_arg[INET_ADDRSTRLEN] = {0};
	int left;

	cl.type = 0;
	if ((cp = strstr(argv[0], ATTR_PROG)) &&
	!strcmp(cp, ATTR_PROG)) {
	cl.type = GEOSTORE;
	op = argv[1];
	optind = 2;
	opt_string = ATTR_OPTION_STRING;
	} else if (argc > 1 && (strcmp(arg1, "arbitrator") == 0 \|\|
	strcmp(arg1, "site") == 0 \|\|
	strcmp(arg1, "start") == 0 \|\|
	strcmp(arg1, "daemon") == 0)) {
	cl.type = DAEMON;
	optind = 2;
	} else if (argc > 1 && (strcmp(arg1, "status") == 0)) {
	cl.type = STATUS;
	optind = 2;
	} else if (argc > 1 && (strcmp(arg1, "client") == 0)) {
	cl.type = CLIENT;
	if (argc < 3) {
	print_usage();
	exit(EXIT_FAILURE);
	}
	op = argv[2];
	optind = 3;
	}
	if (!cl.type) {
	cl.type = CLIENT;
	op = argv[1];
	optind = 2;
	}

	if (argc < 2 \|\| !strcmp(arg1, "help") \|\| !strcmp(arg1, "--help") \|\|
	!strcmp(arg1, "-h")) {
	if (cl.type == GEOSTORE)
	print_geostore_usage();
	else
	print_usage();
	exit(EXIT_SUCCESS);
	}

	if (!strcmp(arg1, "version") \|\| !strcmp(arg1, "--version") \|\|
	!strcmp(arg1, "-V")) {
	printf("%s %s\n", argv[0], RELEASE_STR);
	exit(EXIT_SUCCESS);
	}

	if (cl.type == CLIENT) {
	if (!strcmp(op, "list"))
	cl.op = CMD_LIST;
	else if (!strcmp(op, "grant"))
	cl.op = CMD_GRANT;
	else if (!strcmp(op, "revoke"))
	cl.op = CMD_REVOKE;
	else if (!strcmp(op, "peers"))
	cl.op = CMD_PEERS;
	else {
	fprintf(stderr, "client operation \"%s\" is unknown\n",
	op);
	exit(EXIT_FAILURE);
	}
	} else if (cl.type == GEOSTORE) {
	if (!strcmp(op, "list"))
	cl.op = ATTR_LIST;
	else if (!strcmp(op, "set"))
	cl.op = ATTR_SET;
	else if (!strcmp(op, "get"))
	cl.op = ATTR_GET;
	else if (!strcmp(op, "delete"))
	cl.op = ATTR_DEL;
	else {
	fprintf(stderr, "attribute operation \"%s\" is unknown\n",
	op);
	exit(EXIT_FAILURE);
	}
	}

	while (optind < argc) {
	optchar = getopt(argc, argv, opt_string);

	switch (optchar) {
	case 'c':
	if (strchr(optarg, '/')) {
	safe_copy(cl.configfile, optarg,
	sizeof(cl.configfile), "config file");
	} else {
	/* If no "/" in there, use with default directory. */
	strcpy(cl.configfile, BOOTH_DEFAULT_CONF_DIR);
	cp = cl.configfile + strlen(BOOTH_DEFAULT_CONF_DIR);
	assert(cp > cl.configfile);
	assert(*(cp-1) == '/');

	/* Write at the \0, ie. after the "/" */
	safe_copy(cp, optarg,
	(sizeof(cl.configfile) -
	(cp - cl.configfile) -
	strlen(BOOTH_DEFAULT_CONF_EXT)),
	"config name");

	/* If no extension, append ".conf".
	* Space is available, see -strlen() above. */
	if (!strchr(cp, '.'))
	strcat(cp, BOOTH_DEFAULT_CONF_EXT);
	}
	break;

	case 'D':
	debug_level++;
	break;

	case 'S':
	daemonize = 0;
	enable_stderr = 1;
	break;

	case 'l':
	safe_copy(cl.lockfile, optarg, sizeof(cl.lockfile), "lock file");
	break;
	case 't':
	if (cl.op == CMD_GRANT \|\| cl.op == CMD_REVOKE) {
	safe_copy(cl.msg.ticket.id, optarg,
	sizeof(cl.msg.ticket.id), "ticket name");
	} else if (cl.type == GEOSTORE) {
	safe_copy(cl.attr_msg.attr.tkt_id, optarg,
	sizeof(cl.attr_msg.attr.tkt_id), "ticket name");
	} else {
	print_usage();
	exit(EXIT_FAILURE);
	}
	break;

	case 's':
	/* For testing and debugging: allow "-s site" also for
	* daemon start, so that the address that should be used
	* can be set manually.
	* This makes it easier to start multiple processes
	* on one machine. */
	if (cl.type == CLIENT \|\| cl.type == GEOSTORE \|\|
	(cl.type == DAEMON && debug_level)) {
	if (strcmp(optarg, OTHER_SITE) &&
	host_convert(optarg, site_arg, INET_ADDRSTRLEN) == 0) {
	safe_copy(cl.site, site_arg, sizeof(cl.site), "site name");
	} else {
	safe_copy(cl.site, optarg, sizeof(cl.site), "site name");
	}
	} else {
	log_error("\"-s\" not allowed in daemon mode.");
	exit(EXIT_FAILURE);
	}
	break;

	case 'F':
	if (cl.type != CLIENT \|\| cl.op != CMD_GRANT) {
	log_error("use \"-F\" only for client grant");
	exit(EXIT_FAILURE);
	}
	cl.options \|= OPT_IMMEDIATE;
	break;

	case 'w':
	if (cl.type != CLIENT \|\|
	(cl.op != CMD_GRANT && cl.op != CMD_REVOKE)) {
	log_error("use \"-w\" only for grant and revoke");
	exit(EXIT_FAILURE);
	}
	cl.options \|= OPT_WAIT;
	break;

	case 'C':
	if (cl.type != CLIENT \|\| cl.op != CMD_GRANT) {
	log_error("use \"-C\" only for grant");
	exit(EXIT_FAILURE);
	}
	cl.options \|= OPT_WAIT \| OPT_WAIT_COMMIT;
	break;

	case 'h':
	if (cl.type == GEOSTORE)
	print_geostore_usage();
	else
	print_usage();
	exit(EXIT_SUCCESS);
	break;

	case ':':
	case '?':
	fprintf(stderr, "Please use '-h' for usage.\n");
	exit(EXIT_FAILURE);
	break;

	case -1:
	/* No more parameters on cmdline, only arguments. */
	goto extra_args;

	default:
	goto unknown;
	};
	}

	return 0;

	extra_args:
	if (cl.type == CLIENT && !cl.msg.ticket.id[0]) {
	cparg(cl.msg.ticket.id, "ticket name");
	} else if (cl.type == GEOSTORE) {
	if (cl.op != ATTR_LIST) {
	cparg(cl.attr_msg.attr.name, "attribute name");
	}
	if (cl.op == ATTR_SET) {
	cparg(cl.attr_msg.attr.val, "attribute value");
	}
	}

	if (optind == argc)
	return 0;


	left = argc - optind;
	fprintf(stderr, "Superfluous argument%s: %s%s\n",
	left == 1 ? "" : "s",
	argv[optind],
	left == 1 ? "" : "...");
	exit(EXIT_FAILURE);

	unknown:
	fprintf(stderr, "unknown option: %s\n", argv[optind]);
	exit(EXIT_FAILURE);

	missingarg:
	fprintf(stderr, "not enough arguments\n");
	exit(EXIT_FAILURE);
	}


	static void set_scheduler(void)
	{
	struct sched_param sched_param;
	struct rlimit rlimit;
	int rv;

	rlimit.rlim_cur = RLIM_INFINITY;
	rlimit.rlim_max = RLIM_INFINITY;
	rv = setrlimit(RLIMIT_MEMLOCK, &rlimit);
	if (rv < 0) {
	log_error("setrlimit failed");
	} else {
	rv = mlockall(MCL_CURRENT \| MCL_FUTURE);
	if (rv < 0) {
	log_error("mlockall failed");
	}
	}

	rv = sched_get_priority_max(SCHED_RR);
	if (rv != -1) {
	sched_param.sched_priority = rv;
	rv = sched_setscheduler(0, SCHED_RR, &sched_param);
	if (rv == -1)
	log_error("could not set SCHED_RR priority %d: %s (%d)",
	sched_param.sched_priority,
	strerror(errno), errno);
	} else {
	log_error("could not get maximum scheduler priority err %d",
	errno);
	}
	}

	static int set_procfs_val(const char path, const char val)
	{
	int rc = -1;
	FILE *fp = fopen(path, "w");

	if (fp) {
	if (fprintf(fp, "%s", val) > 0)
	rc = 0;
	fclose(fp);
	}
	return rc;
	}

	static int do_status(struct booth_config **conf, int type)
	{
	pid_t pid;
	int rv, status_lock_fd, ret;
	const char *reason = NULL;
	char lockfile_data[1024], *cp;

	assert(conf != NULL);

	ret = PCMK_OCF_NOT_RUNNING;

	rv = setup_config(conf, type);
	if (rv) {
	reason = "Error reading configuration.";
	ret = PCMK_OCF_UNKNOWN_ERROR;
	goto quit;
	}


	if (!local) {
	reason = "No Service IP active here.";
	goto quit;
	}


	rv = _lockfile(O_RDWR, &status_lock_fd, &pid);
	if (status_lock_fd == -1) {
	reason = "No PID file.";
	goto quit;
	}
	if (rv == 0) {
	close(status_lock_fd);
	reason = "PID file not locked.";
	goto quit;
	}
	if (pid) {
	fprintf(stdout, "booth_lockpid=%d ", pid);
	fflush(stdout);
	}

	rv = read(status_lock_fd, lockfile_data, sizeof(lockfile_data) - 1);
	if (rv < 4) {
	close(status_lock_fd);
	reason = "Cannot read lockfile data.";
	ret = PCMK_LSB_UNKNOWN_ERROR;
	goto quit;
	}
	lockfile_data[rv] = 0;

	close(status_lock_fd);


	/* Make sure it's only a single line */
	cp = strchr(lockfile_data, '\r');
	if (cp)
	*cp = 0;
	cp = strchr(lockfile_data, '\n');
	if (cp)
	*cp = 0;



	rv = setup_tcp_listener(1);
	if (rv == 0) {
	reason = "TCP port not in use.";
	goto quit;
	}


	fprintf(stdout, "booth_lockfile='%s' %s\n",
	cl.lockfile, lockfile_data);
	if (!daemonize)
	fprintf(stderr, "Booth at %s port %d seems to be running.\n",
	local->addr_string, site_port(local));
	return 0;


	quit:
	log_debug("not running: %s", reason);
	/* Ie. "DEBUG" */
	if (!daemonize)
	fprintf(stderr, "not running: %s\n", reason);
	return ret;
	}


	static int limit_this_process(void)
	{
	int rv;
	if (!is_root())
	return 0;

	if (setregid(booth_conf->gid, booth_conf->gid) < 0) {
	rv = errno;
	log_error("setregid() didn't work: %s", strerror(rv));
	return rv;
	}

	if (setreuid(booth_conf->uid, booth_conf->uid) < 0) {
	rv = errno;
	log_error("setreuid() didn't work: %s", strerror(rv));
	return rv;
	}

	return 0;
	}

	static int lock_fd = -1;

	static void server_exit(void)
	{
	int rv;

	if (lock_fd >= 0) {
	/* We might not be able to delete it, but at least
	* make it empty. */
	rv = ftruncate(lock_fd, 0);
	(void)rv;
	unlink_lockfile(lock_fd);
	}
	log_info("exiting");
	}

	static void sig_exit_handler(int sig)
	{
	sig_exit_handler_sig = sig;
	sig_exit_handler_called = 1;
	}

	static void sig_usr1_handler(int sig)
	{
	sig_usr1_handler_called = 1;
	}

	static void sig_chld_handler(int sig)
	{
	sig_chld_handler_called = 1;
	}

	static int do_server(struct booth_config **conf, int type)
	{
	int rv = -1;
	static char log_ent[128] = DAEMON_NAME "-";

	assert(conf != NULL);

	rv = setup_config(conf, type);
	if (rv < 0) {
	return rv;
	}

	if (!local) {
	log_error("Cannot find myself in the configuration.");
	exit(EXIT_FAILURE);
	}

	if (daemonize) {
	if (daemon(0, 0) < 0) {
	perror("daemon error");
	exit(EXIT_FAILURE);
	}
	}

	/*
	* Register signal and exit handler
	*/
	signal(SIGUSR1, (__sighandler_t)sig_usr1_handler);
	signal(SIGTERM, (__sighandler_t)sig_exit_handler);
	signal(SIGINT, (__sighandler_t)sig_exit_handler);
	/* we'll handle errors there and then */
	signal(SIGPIPE, SIG_IGN);

	atexit(server_exit);

	/* The lockfile must be written to _after_ the call to daemon(), so
	* that the lockfile contains the pid of the daemon, not the parent. */
	lock_fd = create_lockfile();
	if (lock_fd < 0)
	return lock_fd;

	strcat(log_ent, type_to_string(local->type));
	cl_log_set_entity(log_ent);
	cl_log_enable_stderr(enable_stderr ? TRUE : FALSE);
	cl_log_set_facility(HA_LOG_FACILITY);
	cl_inherit_logging_environment(0);

	log_info("BOOTH %s %s daemon is starting",
	type_to_string(local->type), RELEASE_STR);


	set_scheduler();
	/* we don't want to be killed by the OOM-killer */
	if (set_procfs_val("/proc/self/oom_score_adj", "-999"))
	(void)set_procfs_val("/proc/self/oom_adj", "-16");
	set_proc_title("%s %s %s for [%s]:%d",
	DAEMON_NAME, cl.configfile, type_to_string(local->type),
	local->addr_string, site_port(local));

	rv = limit_this_process();
	if (rv)
	return rv;

	#ifdef COREDUMP_NURSING
	if (cl_enable_coredumps(TRUE) < 0){
	log_error("enabling core dump failed");
	}
	cl_cdtocoredir();
	prctl(PR_SET_DUMPABLE, (unsigned long)TRUE, 0UL, 0UL, 0UL);
	#else
	if (chdir(BOOTH_CORE_DIR) < 0) {
	log_error("cannot change working directory to %s", BOOTH_CORE_DIR);
	}
	#endif

	signal(SIGCHLD, (__sighandler_t)sig_chld_handler);
	rv = loop(lock_fd);

	return rv;
	}

	static int do_client(struct booth_config **conf)
	{
	int rv;

	rv = setup_config(conf, CLIENT);
	if (rv < 0) {
	log_error("cannot read config");
	goto out;
	}

	switch (cl.op) {
	case CMD_LIST:
	case CMD_PEERS:
	rv = query_get_string_answer(cl.op);
	break;

	case CMD_GRANT:
	case CMD_REVOKE:
	rv = do_command(cl.op);
	break;
	}

	out:
	return rv;
	}

	static int do_attr(struct booth_config **conf)
	{
	int rv = -1;

	assert(conf != NULL);

	rv = setup_config(conf, GEOSTORE);
	if (rv < 0) {
	log_error("cannot read config");
	goto out;
	}

	/* We don't check for existence of ticket, so that asking can be
	* done without local configuration, too.
	* Although, that means that the UDP port has to be specified, too. */
	if (!cl.attr_msg.attr.tkt_id[0]) {
	/* If the loaded configuration has only a single ticket defined, use that. */
	if ((*conf)->ticket_count == 1) {
	strncpy(cl.attr_msg.attr.tkt_id,
	(*conf)->ticket[0].name,
	sizeof(cl.attr_msg.attr.tkt_id));
	} else {
	rv = 1;
	log_error("No ticket given.");
	goto out;
	}
	}

	switch (cl.op) {
	case ATTR_LIST:
	case ATTR_GET:
	rv = query_get_string_answer(cl.op);
	break;

	case ATTR_SET:
	case ATTR_DEL:
	rv = do_attr_command(booth_conf, cl.op);
	break;
	}

	out:
	return rv;
	}

	int main(int argc, char argv[], char envp[])
	{
	int rv;
	const char *cp;
	#ifdef LOGGING_LIBQB
	enum qb_log_target_slot i;
	#endif

	init_set_proc_title(argc, argv, envp);
	get_time(&start_time);

	memset(&cl, 0, sizeof(cl));
	strncpy(cl.configfile,
	BOOTH_DEFAULT_CONF, BOOTH_PATH_LEN - 1);
	cl.lockfile[0] = 0;
	debug_level = 0;


	cp = ((cp = strstr(argv[0], ATTR_PROG)) && !strcmp(cp, ATTR_PROG)
	? ATTR_PROG
	: "booth");
	#ifndef LOGGING_LIBQB
	cl_log_set_entity(cp);
	#else
	qb_log_init(cp, LOG_USER, LOG_DEBUG); /* prio driven by debug_level */
	for (i = QB_LOG_TARGET_START; i < QB_LOG_TARGET_MAX; i++) {
	if (i == QB_LOG_SYSLOG \|\| i == QB_LOG_BLACKBOX)
	continue;
	qb_log_format_set(i, "%t %H %N: [%P]: %p: %b");
	}
	(void) qb_log_filter_ctl(QB_LOG_STDERR, QB_LOG_FILTER_ADD,
	QB_LOG_FILTER_FILE, "*", LOG_DEBUG);
	#endif
	cl_log_enable_stderr(TRUE);
	cl_log_set_facility(0);

	rv = read_arguments(argc, argv);
	if (rv < 0)
	goto out;


	switch (cl.type) {
	case STATUS:
	rv = do_status(&booth_conf, cl.type);
	break;

	case ARBITRATOR:
	case DAEMON:
	case SITE:
	rv = do_server(&booth_conf, cl.type);
	break;

	case CLIENT:
	rv = do_client(&booth_conf);
	break;

	case GEOSTORE:
	rv = do_attr(&booth_conf);
	break;
	}

	out:
	#if HAVE_LIBGNUTLS
	gnutls_global_deinit();
	#endif
	#ifdef LOGGING_LIBQB
	qb_log_fini();
	#endif
	/* Normalize values. 0x100 would be seen as "OK" by waitpid(). */
	return (rv >= 0 && rv < 0x70) ? rv : 1;
	}

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