/*
 * Copyright (c) 2009-2012, Vsevolod Stakhov
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY AUTHOR ''AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL AUTHOR BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */


#include "config.h"
#include "util.h"
#include "cfg_file.h"
#include "rspamd.h"
#include "unix-std.h"

#include "xxhash.h"
#include "ottery.h"
#include "cryptobox.h"

#ifdef HAVE_OPENSSL
#include <openssl/rand.h>
#include <openssl/err.h>
#include <openssl/evp.h>
#endif

#ifdef HAVE_TERMIOS_H
#include <termios.h>
#endif
#ifdef HAVE_READPASSPHRASE_H
#include <readpassphrase.h>
#endif
#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif
/* libutil */
#ifdef HAVE_LIBUTIL_H
#include <libutil.h>
#endif
#ifdef __APPLE__
#include <mach/mach_time.h>
#endif
#ifdef WITH_GPERF_TOOLS
#include <google/profiler.h>
#endif
/* poll */
#ifdef HAVE_POLL_H
#include <poll.h>
#endif

#ifdef HAVE_SIGINFO_H
#include <siginfo.h>
#endif
/* sys/wait */
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
/* sys/resource.h */
#ifdef HAVE_SYS_RESOURCE_H
#include <sys/resource.h>
#endif

#include "blake2.h"

/* Check log messages intensity once per minute */
#define CHECK_TIME 60
/* More than 2 log messages per second */
#define BUF_INTENSITY 2
/* Default connect timeout for sync sockets */
#define CONNECT_TIMEOUT 3

const struct rspamd_controller_pbkdf pbkdf_list[] = {
		{
				.id = RSPAMD_PBKDF_ID_V1,
				.rounds = 16000,
				.salt_len = 20,
				.key_len = BLAKE2B_OUTBYTES / 2
		}
};

gint
rspamd_socket_nonblocking (gint fd)
{
	gint ofl;

	ofl = fcntl (fd, F_GETFL, 0);

	if (fcntl (fd, F_SETFL, ofl | O_NONBLOCK) == -1) {
		msg_warn ("fcntl failed: %d, '%s'", errno, strerror (errno));
		return -1;
	}
	return 0;
}

gint
rspamd_socket_blocking (gint fd)
{
	gint ofl;

	ofl = fcntl (fd, F_GETFL, 0);

	if (fcntl (fd, F_SETFL, ofl & (~O_NONBLOCK)) == -1) {
		msg_warn ("fcntl failed: %d, '%s'", errno, strerror (errno));
		return -1;
	}
	return 0;
}

gint
rspamd_socket_poll (gint fd, gint timeout, short events)
{
	gint r;
	struct pollfd fds[1];

	fds->fd = fd;
	fds->events = events;
	fds->revents = 0;
	while ((r = poll (fds, 1, timeout)) < 0) {
		if (errno != EINTR) {
			break;
		}
	}

	return r;
}

gint
rspamd_socket_create (gint af, gint type, gint protocol, gboolean async)
{
	gint fd;

	fd = socket (af, type, protocol);
	if (fd == -1) {
		msg_warn ("socket failed: %d, '%s'", errno, strerror (errno));
		return -1;
	}

	/* Set close on exec */
	if (fcntl (fd, F_SETFD, FD_CLOEXEC) == -1) {
		msg_warn ("fcntl failed: %d, '%s'", errno, strerror (errno));
		close (fd);
		return -1;
	}
	if (async) {
		if (rspamd_socket_nonblocking (fd) == -1) {
			close (fd);
			return -1;
		}
	}

	return fd;
}

static gint
rspamd_inet_socket_create (gint type, struct addrinfo *addr, gboolean is_server,
	gboolean async, GList **list)
{
	gint fd = -1, r, optlen, on = 1, s_error;
	struct addrinfo *cur;

	cur = addr;
	while (cur) {
		/* Create socket */
		fd = rspamd_socket_create (cur->ai_family, type, cur->ai_protocol, TRUE);
		if (fd == -1) {
			goto out;
		}

		if (is_server) {
			setsockopt (fd,
				SOL_SOCKET,
				SO_REUSEADDR,
				(const void *)&on,
				sizeof (gint));
#ifdef HAVE_IPV6_V6ONLY
			if (cur->ai_family == AF_INET6) {
				setsockopt (fd,
					IPPROTO_IPV6,
					IPV6_V6ONLY,
					(const void *)&on,
					sizeof (gint));
			}
#endif
			r = bind (fd, cur->ai_addr, cur->ai_addrlen);
		}
		else {
			r = connect (fd, cur->ai_addr, cur->ai_addrlen);
		}

		if (r == -1) {
			if (errno != EINPROGRESS) {
				msg_warn ("bind/connect failed: %d, '%s'", errno,
					strerror (errno));
				goto out;
			}
			if (!async) {
				/* Try to poll */
				if (rspamd_socket_poll (fd, CONNECT_TIMEOUT * 1000,
					POLLOUT) <= 0) {
					errno = ETIMEDOUT;
					msg_warn ("bind/connect failed: timeout");
					goto out;
				}
				else {
					/* Make synced again */
					if (rspamd_socket_blocking (fd) < 0) {
						goto out;
					}
				}
			}
		}
		else {
			/* Still need to check SO_ERROR on socket */
			optlen = sizeof (s_error);
			getsockopt (fd, SOL_SOCKET, SO_ERROR, (void *)&s_error, &optlen);
			if (s_error) {
				errno = s_error;
				goto out;
			}
		}
		if (list == NULL) {
			/* Go out immediately */
			break;
		}
		else if (fd != -1) {
			*list = g_list_prepend (*list, GINT_TO_POINTER (fd));
			cur = cur->ai_next;
			continue;
		}
out:
		if (fd != -1) {
			close (fd);
		}
		fd = -1;
		cur = cur->ai_next;
	}
	return (fd);
}

gint
rspamd_socket_tcp (struct addrinfo *addr, gboolean is_server, gboolean async)
{
	return rspamd_inet_socket_create (SOCK_STREAM, addr, is_server, async, NULL);
}

gint
rspamd_socket_udp (struct addrinfo *addr, gboolean is_server, gboolean async)
{
	return rspamd_inet_socket_create (SOCK_DGRAM, addr, is_server, async, NULL);
}

gint
rspamd_socket_unix (const gchar *path,
	struct sockaddr_un *addr,
	gint type,
	gboolean is_server,
	gboolean async)
{
	gint fd = -1, s_error, r, optlen, serrno, on = 1;
	struct stat st;

	if (path == NULL)
		return -1;

	addr->sun_family = AF_UNIX;

	rspamd_strlcpy (addr->sun_path, path, sizeof (addr->sun_path));
#ifdef FREEBSD
	addr->sun_len = SUN_LEN (addr);
#endif

	if (is_server) {
		/* Unlink socket if it exists already */
		if (lstat (addr->sun_path, &st) != -1) {
			if (S_ISSOCK (st.st_mode)) {
				if (unlink (addr->sun_path) == -1) {
					msg_warn ("unlink %s failed: %d, '%s'",
						addr->sun_path,
						errno,
						strerror (errno));
					goto out;
				}
			}
			else {
				msg_warn ("%s is not a socket", addr->sun_path);
				goto out;
			}
		}
	}
	fd = socket (PF_LOCAL, type, 0);

	if (fd == -1) {
		msg_warn ("socket failed %s: %d, '%s'",
			addr->sun_path,
			errno,
			strerror (errno));
		return -1;
	}

	if (rspamd_socket_nonblocking (fd) < 0) {
		goto out;
	}

	/* Set close on exec */
	if (fcntl (fd, F_SETFD, FD_CLOEXEC) == -1) {
		msg_warn ("fcntl failed %s: %d, '%s'", addr->sun_path, errno,
			strerror (errno));
		goto out;
	}
	if (is_server) {
		setsockopt (fd, SOL_SOCKET, SO_REUSEADDR, (const void *)&on,
			sizeof (gint));
		r = bind (fd, (struct sockaddr *)addr, SUN_LEN (addr));
	}
	else {
		r = connect (fd, (struct sockaddr *)addr, SUN_LEN (addr));
	}

	if (r == -1) {
		if (errno != EINPROGRESS) {
			msg_warn ("bind/connect failed %s: %d, '%s'",
				addr->sun_path,
				errno,
				strerror (errno));
			goto out;
		}
		if (!async) {
			/* Try to poll */
			if (rspamd_socket_poll (fd, CONNECT_TIMEOUT * 1000, POLLOUT) <= 0) {
				errno = ETIMEDOUT;
				msg_warn ("bind/connect failed %s: timeout", addr->sun_path);
				goto out;
			}
			else {
				/* Make synced again */
				if (rspamd_socket_blocking (fd) < 0) {
					goto out;
				}
			}
		}
	}
	else {
		/* Still need to check SO_ERROR on socket */
		optlen = sizeof (s_error);
		getsockopt (fd, SOL_SOCKET, SO_ERROR, (void *)&s_error, &optlen);
		if (s_error) {
			errno = s_error;
			goto out;
		}
	}


	return (fd);

out:
	serrno = errno;
	if (fd != -1) {
		close (fd);
	}
	errno = serrno;
	return (-1);
}

/**
 * Make a universal socket
 * @param credits host, ip or path to unix socket
 * @param port port (used for network sockets)
 * @param async make this socket asynced
 * @param is_server make this socket as server socket
 * @param try_resolve try name resolution for a socket (BLOCKING)
 */
gint
rspamd_socket (const gchar *credits, guint16 port,
	gint type, gboolean async, gboolean is_server, gboolean try_resolve)
{
	struct sockaddr_un un;
	struct stat st;
	struct addrinfo hints, *res;
	gint r;
	gchar portbuf[8];

	if (*credits == '/') {
		if (is_server) {
			return rspamd_socket_unix (credits, &un, type, is_server, async);
		}
		else {
			r = stat (credits, &st);
			if (r == -1) {
				/* Unix socket doesn't exists it must be created first */
				errno = ENOENT;
				return -1;
			}
			else {
				if ((st.st_mode & S_IFSOCK) == 0) {
					/* Path is not valid socket */
					errno = EINVAL;
					return -1;
				}
				else {
					return rspamd_socket_unix (credits,
							   &un,
							   type,
							   is_server,
							   async);
				}
			}
		}
	}
	else {
		/* TCP related part */
		memset (&hints, 0, sizeof (hints));
		hints.ai_family = AF_UNSPEC;     /* Allow IPv4 or IPv6 */
		hints.ai_socktype = type; /* Type of the socket */
		hints.ai_flags = is_server ? AI_PASSIVE : 0;
		hints.ai_protocol = 0;           /* Any protocol */
		hints.ai_canonname = NULL;
		hints.ai_addr = NULL;
		hints.ai_next = NULL;

		if (!try_resolve) {
			hints.ai_flags |= AI_NUMERICHOST | AI_NUMERICSERV;
		}

		rspamd_snprintf (portbuf, sizeof (portbuf), "%d", (int)port);
		if ((r = getaddrinfo (credits, portbuf, &hints, &res)) == 0) {
			r = rspamd_inet_socket_create (type, res, is_server, async, NULL);
			freeaddrinfo (res);
			return r;
		}
		else {
			msg_err ("address resolution for %s failed: %s",
				credits,
				gai_strerror (r));
			return FALSE;
		}
	}
}

/**
 * Make universal stream socket
 * @param credits host, ip or path to unix socket
 * @param port port (used for network sockets)
 * @param async make this socket asynced
 * @param is_server make this socket as server socket
 * @param try_resolve try name resolution for a socket (BLOCKING)
 */
GList *
rspamd_sockets_list (const gchar *credits, guint16 port,
	gint type, gboolean async, gboolean is_server, gboolean try_resolve)
{
	struct sockaddr_un un;
	struct stat st;
	struct addrinfo hints, *res;
	gint r, fd = -1, serrno;
	gchar portbuf[8], **strv, **cur;
	GList *result = NULL, *rcur;

	strv = g_strsplit_set (credits, ",", -1);
	if (strv == NULL) {
		msg_err ("invalid sockets credentials: %s", credits);
		return NULL;
	}
	cur = strv;
	while (*cur != NULL) {
		if (*credits == '/') {
			if (is_server) {
				fd = rspamd_socket_unix (credits, &un, type, is_server, async);
			}
			else {
				r = stat (credits, &st);
				if (r == -1) {
					/* Unix socket doesn't exists it must be created first */
					errno = ENOENT;
					goto err;
				}
				else {
					if ((st.st_mode & S_IFSOCK) == 0) {
						/* Path is not valid socket */
						errno = EINVAL;
						goto err;
					}
					else {
						fd = rspamd_socket_unix (credits,
								&un,
								type,
								is_server,
								async);
					}
				}
			}
			if (fd != -1) {
				result = g_list_prepend (result, GINT_TO_POINTER (fd));
			}
			else {
				goto err;
			}
		}
		else {
			/* TCP related part */
			memset (&hints, 0, sizeof (hints));
			hints.ai_family = AF_UNSPEC;     /* Allow IPv4 or IPv6 */
			hints.ai_socktype = type; /* Type of the socket */
			hints.ai_flags = is_server ? AI_PASSIVE : 0;
			hints.ai_protocol = 0;           /* Any protocol */
			hints.ai_canonname = NULL;
			hints.ai_addr = NULL;
			hints.ai_next = NULL;

			if (!try_resolve) {
				hints.ai_flags |= AI_NUMERICHOST | AI_NUMERICSERV;
			}

			rspamd_snprintf (portbuf, sizeof (portbuf), "%d", (int)port);
			if ((r = getaddrinfo (credits, portbuf, &hints, &res)) == 0) {
				fd = rspamd_inet_socket_create (type, res, is_server, async, &result);
				freeaddrinfo (res);

				if (result == NULL) {
					if (fd != -1) {
						close (fd);
					}

					goto err;
				}
			}
			else {
				msg_err ("address resolution for %s failed: %s",
					credits,
					gai_strerror (r));
				goto err;
			}
		}

		cur++;
	}

	g_strfreev (strv);
	return result;

err:
	g_strfreev (strv);
	serrno = errno;
	rcur = result;
	while (rcur != NULL) {
		fd = GPOINTER_TO_INT (rcur->data);
		if (fd != -1) {
			close (fd);
		}
		rcur = g_list_next (rcur);
	}
	if (result != NULL) {
		g_list_free (result);
	}

	errno = serrno;
	return NULL;
}

gboolean
rspamd_socketpair (gint pair[2])
{
	gint r, serrno;

#ifdef HAVE_SOCK_SEQPACKET
	r = socketpair (AF_LOCAL, SOCK_SEQPACKET, 0, pair);

	if (r == -1) {
		msg_warn ("seqpacket socketpair failed: %d, '%s'",
				errno,
				strerror (errno));
		r = socketpair (AF_LOCAL, SOCK_DGRAM, 0, pair);
	}
#else
	r = socketpair (AF_LOCAL, SOCK_DGRAM, 0, pair);
#endif

	if (r == -1) {
		msg_warn ("socketpair failed: %d, '%s'", errno, strerror (
				errno), pair[0], pair[1]);
		return -1;
	}

	/* Set close on exec */
	if (fcntl (pair[0], F_SETFD, FD_CLOEXEC) == -1) {
		msg_warn ("fcntl failed: %d, '%s'", errno, strerror (errno));
		goto out;
	}
	if (fcntl (pair[1], F_SETFD, FD_CLOEXEC) == -1) {
		msg_warn ("fcntl failed: %d, '%s'", errno, strerror (errno));
		goto out;
	}

	return TRUE;

out:
	serrno = errno;
	close (pair[0]);
	close (pair[1]);
	errno = serrno;

	return FALSE;
}

gint
rspamd_write_pid (struct rspamd_main *main)
{
	pid_t pid;

	if (main->cfg->pid_file == NULL) {
		return -1;
	}
	main->pfh = rspamd_pidfile_open (main->cfg->pid_file, 0644, &pid);

	if (main->pfh == NULL) {
		return -1;
	}

	if (main->is_privilleged) {
		/* Force root user as owner of pid file */
#ifdef HAVE_PIDFILE_FILENO
		if (fchown (pidfile_fileno (main->pfh), 0, 0) == -1) {
#else
		if (fchown (main->pfh->pf_fd, 0, 0) == -1) {
#endif
			msg_err ("cannot chown of pidfile %s to 0:0 user",
				main->cfg->pid_file);
		}
	}

	rspamd_pidfile_write (main->pfh);

	return 0;
}

#ifdef HAVE_SA_SIGINFO
void
rspamd_signals_init (struct sigaction *signals, void (*sig_handler)(gint,
	siginfo_t *,
	void *))
#else
void
rspamd_signals_init (struct sigaction *signals, void (*sig_handler)(gint))
#endif
{
	struct sigaction sigpipe_act;
	/* Setting up signal handlers */
	/* SIGUSR1 - reopen config file */
	/* SIGUSR2 - worker is ready for accept */
	sigemptyset (&signals->sa_mask);
	sigaddset (&signals->sa_mask, SIGTERM);
	sigaddset (&signals->sa_mask, SIGINT);
	sigaddset (&signals->sa_mask, SIGHUP);
	sigaddset (&signals->sa_mask, SIGCHLD);
	sigaddset (&signals->sa_mask, SIGUSR1);
	sigaddset (&signals->sa_mask, SIGUSR2);
	sigaddset (&signals->sa_mask, SIGALRM);
#ifdef SIGPOLL
	sigaddset (&signals->sa_mask, SIGPOLL);
#endif
#ifdef SIGIO
	sigaddset (&signals->sa_mask, SIGIO);
#endif

#ifdef HAVE_SA_SIGINFO
	signals->sa_flags = SA_SIGINFO;
	signals->sa_handler = NULL;
	signals->sa_sigaction = sig_handler;
#else
	signals->sa_handler = sig_handler;
	signals->sa_flags = 0;
#endif
	sigaction (SIGTERM, signals, NULL);
	sigaction (SIGINT,	signals, NULL);
	sigaction (SIGHUP,	signals, NULL);
	sigaction (SIGCHLD, signals, NULL);
	sigaction (SIGUSR1, signals, NULL);
	sigaction (SIGUSR2, signals, NULL);
	sigaction (SIGALRM, signals, NULL);

	/* Ignore SIGPIPE as we handle write errors manually */
	sigemptyset (&sigpipe_act.sa_mask);
	sigaddset (&sigpipe_act.sa_mask, SIGPIPE);
	sigpipe_act.sa_handler = SIG_IGN;
	sigpipe_act.sa_flags = 0;
	sigaction (SIGPIPE, &sigpipe_act, NULL);
}

static void
pass_signal_cb (gpointer key, gpointer value, gpointer ud)
{
	struct rspamd_worker *cur = value;
	gint signo = GPOINTER_TO_INT (ud);

	kill (cur->pid, signo);
}

void
rspamd_pass_signal (GHashTable * workers, gint signo)
{
	g_hash_table_foreach (workers, pass_signal_cb, GINT_TO_POINTER (signo));
}

#ifndef HAVE_SETPROCTITLE

#if !defined(DARWIN) && !defined(SOLARIS) && !defined(__APPLE__)
static gchar *title_buffer = 0;
static size_t title_buffer_size = 0;
static gchar *title_progname, *title_progname_full;
#endif

gint
setproctitle (const gchar *fmt, ...)
{
#if defined(DARWIN) || defined(SOLARIS) || defined(__APPLE__)
	GString *dest;
	va_list ap;

	dest = g_string_new ("");
	va_start (ap, fmt);
	rspamd_vprintf_gstring (dest, fmt, ap);
	va_end (ap);

	g_set_prgname (dest->str);
	g_string_free (dest, TRUE);

	return 0;
#else
	if (!title_buffer || !title_buffer_size) {
		errno = ENOMEM;
		return -1;
	}

	memset (title_buffer, '\0', title_buffer_size);

	ssize_t written;

	if (fmt) {
		ssize_t written2;
		va_list ap;

		written = snprintf (title_buffer,
				title_buffer_size,
				"%s: ",
				title_progname);
		if (written < 0 || (size_t) written >= title_buffer_size)
			return -1;

		va_start (ap, fmt);
		written2 = vsnprintf (title_buffer + written,
				title_buffer_size - written,
				fmt,
				ap);
		va_end (ap);
		if (written2 < 0 || (size_t) written2 >= title_buffer_size - written)
			return -1;
	}
	else {
		written = snprintf (title_buffer,
				title_buffer_size,
				"%s",
				title_progname);
		if (written < 0 || (size_t) written >= title_buffer_size)
			return -1;
	}

	written = strlen (title_buffer);
	memset (title_buffer + written, '\0', title_buffer_size - written);

	return 0;
#endif
}

/*
   It has to be _init function, because __attribute__((constructor))
   functions gets called without arguments.
 */

gint
init_title (gint argc, gchar *argv[], gchar *envp[])
{
#if defined(DARWIN) || defined(SOLARIS) || defined(__APPLE__)
	/* XXX: try to handle these OSes too */
	return 0;
#else
	gchar *begin_of_buffer = 0, *end_of_buffer = 0;
	gint i;

	for (i = 0; i < argc; ++i) {
		if (!begin_of_buffer)
			begin_of_buffer = argv[i];
		if (!end_of_buffer || end_of_buffer + 1 == argv[i])
			end_of_buffer = argv[i] + strlen (argv[i]);
	}

	for (i = 0; envp[i]; ++i) {
		if (!begin_of_buffer)
			begin_of_buffer = envp[i];
		if (!end_of_buffer || end_of_buffer + 1 == envp[i])
			end_of_buffer = envp[i] + strlen (envp[i]);
	}

	if (!end_of_buffer)
		return 0;

	gchar **new_environ = g_malloc ((i + 1) * sizeof (envp[0]));

	if (!new_environ)
		return 0;

	for (i = 0; envp[i]; ++i) {
		if (!(new_environ[i] = g_strdup (envp[i])))
			goto cleanup_enomem;
	}
	new_environ[i] = 0;

	if (program_invocation_name) {
		title_progname_full = g_strdup (program_invocation_name);

		if (!title_progname_full)
			goto cleanup_enomem;

		gchar *p = strrchr (title_progname_full, '/');

		if (p)
			title_progname = p + 1;
		else
			title_progname = title_progname_full;

		program_invocation_name = title_progname_full;
		program_invocation_short_name = title_progname;
	}

	environ = new_environ;
	title_buffer = begin_of_buffer;
	title_buffer_size = end_of_buffer - begin_of_buffer;

	return 0;

cleanup_enomem:
	for (--i; i >= 0; --i) {
		g_free (new_environ[i]);
	}
	g_free (new_environ);
	return 0;
#endif
}
#endif

#ifndef HAVE_PIDFILE
static gint _rspamd_pidfile_remove (rspamd_pidfh_t *pfh, gint freeit);

static gint
rspamd_pidfile_verify (rspamd_pidfh_t *pfh)
{
	struct stat sb;

	if (pfh == NULL || pfh->pf_fd == -1)
		return (-1);
	/*
	 * Check remembered descriptor.
	 */
	if (fstat (pfh->pf_fd, &sb) == -1)
		return (errno);
	if (sb.st_dev != pfh->pf_dev || sb.st_ino != pfh->pf_ino)
		return -1;
	return 0;
}

static gint
rspamd_pidfile_read (const gchar *path, pid_t * pidptr)
{
	gchar buf[16], *endptr;
	gint error, fd, i;

	fd = open (path, O_RDONLY);
	if (fd == -1)
		return (errno);

	i = read (fd, buf, sizeof (buf) - 1);
	error = errno;              /* Remember errno in case close() wants to change it. */
	close (fd);
	if (i == -1)
		return error;
	else if (i == 0)
		return EAGAIN;
	buf[i] = '\0';

	*pidptr = strtol (buf, &endptr, 10);
	if (endptr != &buf[i])
		return EINVAL;

	return 0;
}

rspamd_pidfh_t *
rspamd_pidfile_open (const gchar *path, mode_t mode, pid_t * pidptr)
{
	rspamd_pidfh_t *pfh;
	struct stat sb;
	gint error, fd, len, count;
	struct timespec rqtp;

	pfh = g_malloc (sizeof (*pfh));
	if (pfh == NULL)
		return NULL;

	if (path == NULL)
		len = snprintf (pfh->pf_path,
				sizeof (pfh->pf_path),
				"/var/run/%s.pid",
				g_get_prgname ());
	else
		len = snprintf (pfh->pf_path, sizeof (pfh->pf_path), "%s", path);
	if (len >= (gint)sizeof (pfh->pf_path)) {
		g_free (pfh);
		errno = ENAMETOOLONG;
		return NULL;
	}

	/*
	 * Open the PID file and obtain exclusive lock.
	 * We truncate PID file here only to remove old PID immediatelly,
	 * PID file will be truncated again in pidfile_write(), so
	 * pidfile_write() can be called multiple times.
	 */
	fd = open (pfh->pf_path, O_WRONLY | O_CREAT | O_TRUNC | O_NONBLOCK, mode);
	rspamd_file_lock (fd, TRUE);
	if (fd == -1) {
		count = 0;
		rqtp.tv_sec = 0;
		rqtp.tv_nsec = 5000000;
		if (errno == EWOULDBLOCK && pidptr != NULL) {
again:
			errno = rspamd_pidfile_read (pfh->pf_path, pidptr);
			if (errno == 0)
				errno = EEXIST;
			else if (errno == EAGAIN) {
				if (++count <= 3) {
					nanosleep (&rqtp, 0);
					goto again;
				}
			}
		}
		g_free (pfh);
		return NULL;
	}
	/*
	 * Remember file information, so in pidfile_write() we are sure we write
	 * to the proper descriptor.
	 */
	if (fstat (fd, &sb) == -1) {
		error = errno;
		unlink (pfh->pf_path);
		close (fd);
		g_free (pfh);
		errno = error;
		return NULL;
	}

	pfh->pf_fd = fd;
	pfh->pf_dev = sb.st_dev;
	pfh->pf_ino = sb.st_ino;

	return pfh;
}

gint
rspamd_pidfile_write (rspamd_pidfh_t *pfh)
{
	gchar pidstr[16];
	gint error, fd;

	/*
	 * Check remembered descriptor, so we don't overwrite some other
	 * file if pidfile was closed and descriptor reused.
	 */
	errno = rspamd_pidfile_verify (pfh);
	if (errno != 0) {
		/*
		 * Don't close descriptor, because we are not sure if it's ours.
		 */
		return -1;
	}
	fd = pfh->pf_fd;

	/*
	 * Truncate PID file, so multiple calls of pidfile_write() are allowed.
	 */
	if (ftruncate (fd, 0) == -1) {
		error = errno;
		_rspamd_pidfile_remove (pfh, 0);
		errno = error;
		return -1;
	}

	rspamd_snprintf (pidstr, sizeof (pidstr), "%P", getpid ());
	if (pwrite (fd, pidstr, strlen (pidstr), 0) != (ssize_t) strlen (pidstr)) {
		error = errno;
		_rspamd_pidfile_remove (pfh, 0);
		errno = error;
		return -1;
	}

	return 0;
}

gint
rspamd_pidfile_close (rspamd_pidfh_t *pfh)
{
	gint error;

	error = rspamd_pidfile_verify (pfh);
	if (error != 0) {
		errno = error;
		return -1;
	}

	if (close (pfh->pf_fd) == -1)
		error = errno;
	g_free (pfh);
	if (error != 0) {
		errno = error;
		return -1;
	}
	return 0;
}

static gint
_rspamd_pidfile_remove (rspamd_pidfh_t *pfh, gint freeit)
{
	gint error;

	error = rspamd_pidfile_verify (pfh);
	if (error != 0) {
		errno = error;
		return -1;
	}

	if (unlink (pfh->pf_path) == -1)
		error = errno;
	if (!rspamd_file_unlock (pfh->pf_fd, FALSE)) {
		if (error == 0)
			error = errno;
	}
	if (close (pfh->pf_fd) == -1) {
		if (error == 0)
			error = errno;
	}
	if (freeit)
		g_free (pfh);
	else
		pfh->pf_fd = -1;
	if (error != 0) {
		errno = error;
		return -1;
	}
	return 0;
}

gint
rspamd_pidfile_remove (rspamd_pidfh_t *pfh)
{

	return (_rspamd_pidfile_remove (pfh, 1));
}
#endif

/* Replace %r with rcpt value and %f with from value, new string is allocated in pool */
gchar *
resolve_stat_filename (rspamd_mempool_t * pool,
	gchar *pattern,
	gchar *rcpt,
	gchar *from)
{
	gint need_to_format = 0, len = 0;
	gint rcptlen, fromlen;
	gchar *c = pattern, *new, *s;

	if (rcpt) {
		rcptlen = strlen (rcpt);
	}
	else {
		rcptlen = 0;
	}

	if (from) {
		fromlen = strlen (from);
	}
	else {
		fromlen = 0;
	}

	/* Calculate length */
	while (*c++) {
		if (*c == '%' && *(c + 1) == 'r') {
			len += rcptlen;
			c += 2;
			need_to_format = 1;
			continue;
		}
		else if (*c == '%' && *(c + 1) == 'f') {
			len += fromlen;
			c += 2;
			need_to_format = 1;
			continue;
		}
		len++;
	}

	/* Do not allocate extra memory if we do not need to format string */
	if (!need_to_format) {
		return pattern;
	}

	/* Allocate new string */
	new = rspamd_mempool_alloc (pool, len);
	c = pattern;
	s = new;

	/* Format string */
	while (*c++) {
		if (*c == '%' && *(c + 1) == 'r') {
			c += 2;
			memcpy (s, rcpt, rcptlen);
			s += rcptlen;
			continue;
		}
		else if (*c == '%' && *(c + 1) == 'r') {
			c += 2;
			memcpy (s, from, fromlen);
			s += fromlen;
			continue;
		}
		*s++ = *c;
	}

	*s = '\0';

	return new;
}

const gchar *
rspamd_log_check_time (gdouble start_real, gdouble start_virtual, gint resolution)
{
	double vdiff, diff, end_real, end_virtual;
	static gchar res[64];
	static gchar fmt[sizeof ("%.10f ms real, %.10f ms virtual")];

	end_real = rspamd_get_ticks ();
	end_virtual = rspamd_get_virtual_ticks ();
	vdiff = (end_virtual - start_virtual) * 1000;
	diff = (end_real - start_real) * 1000;

	sprintf (fmt, "%%.%dfms real, %%.%dfms virtual", resolution, resolution);
	snprintf (res, sizeof (res), fmt, diff, vdiff);

	return (const gchar *)res;
}


void
gperf_profiler_init (struct rspamd_config *cfg, const gchar *descr)
{
#if defined(WITH_GPERF_TOOLS)
	gchar prof_path[PATH_MAX];
	const gchar *prefix;

	if (getenv ("CPUPROFILE")) {

		/* disable inherited Profiler enabled in master process */
		ProfilerStop ();
	}

	if (cfg != NULL) {
		/* Try to create temp directory for gmon.out and chdir to it */
		if (cfg->profile_path == NULL) {
			cfg->profile_path =
				g_strdup_printf ("%s/rspamd-profile", cfg->temp_dir);
		}

		prefix = cfg->profile_path;
	}
	else {
		prefix = "/tmp/rspamd-profile";
	}

	snprintf (prof_path,
		sizeof (prof_path),
		"%s-%s.%d",
		prefix,
		descr,
		(gint)getpid ());
	if (ProfilerStart (prof_path)) {
		/* start ITIMER_PROF timer */
		ProfilerRegisterThread ();
	}
	else {
		msg_warn ("cannot start google perftools profiler");
	}
#endif
}

void
gperf_profiler_stop (void)
{
#if defined(WITH_GPERF_TOOLS)
	ProfilerStop ();
#endif
}

#ifdef HAVE_FLOCK
/* Flock version */
gboolean
rspamd_file_lock (gint fd, gboolean async)
{
	gint flags;

	if (async) {
		flags = LOCK_EX | LOCK_NB;
	}
	else {
		flags = LOCK_EX;
	}

	if (flock (fd, flags) == -1) {
		if (async && errno == EAGAIN) {
			return FALSE;
		}
		msg_warn ("lock on file failed: %s", strerror (errno));
		return FALSE;
	}

	return TRUE;
}

gboolean
rspamd_file_unlock (gint fd, gboolean async)
{
	gint flags;

	if (async) {
		flags = LOCK_UN | LOCK_NB;
	}
	else {
		flags = LOCK_UN;
	}

	if (flock (fd, flags) == -1) {
		if (async && errno == EAGAIN) {
			return FALSE;
		}
		msg_warn ("lock on file failed: %s", strerror (errno));
		return FALSE;
	}

	return TRUE;

}
#else /* HAVE_FLOCK */
/* Fctnl version */
gboolean
rspamd_file_lock (gint fd, gboolean async)
{
	struct flock fl = {
		.l_type = F_WRLCK,
		.l_whence = SEEK_SET,
		.l_start = 0,
		.l_len = 0
	};

	if (fcntl (fd, async ? F_SETLK : F_SETLKW, &fl) == -1) {
		if (async && (errno == EAGAIN || errno == EACCES)) {
			return FALSE;
		}
		msg_warn ("lock on file failed: %s", strerror (errno));
		return FALSE;
	}

	return TRUE;
}

gboolean
rspamd_file_unlock (gint fd, gboolean async)
{
	struct flock fl = {
		.l_type = F_UNLCK,
		.l_whence = SEEK_SET,
		.l_start = 0,
		.l_len = 0
	};

	if (fcntl (fd, async ? F_SETLK : F_SETLKW, &fl) == -1) {
		if (async && (errno == EAGAIN || errno == EACCES)) {
			return FALSE;
		}
		msg_warn ("lock on file failed: %s", strerror (errno));
		return FALSE;
	}

	return TRUE;

}
#endif /* HAVE_FLOCK */


#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION < 22))
void
g_ptr_array_unref (GPtrArray *array)
{
	g_ptr_array_free (array, TRUE);
}
#endif
#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION < 14))
void
g_queue_clear (GQueue *queue)
{
	g_return_if_fail (queue != NULL);

	g_list_free (queue->head);
	queue->head = queue->tail = NULL;
	queue->length = 0;
}
#endif
#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION < 30))
GPtrArray*
g_ptr_array_new_full (guint reserved_size,
		GDestroyNotify element_free_func)
{
	GPtrArray *array;

	array = g_ptr_array_sized_new (reserved_size);
	g_ptr_array_set_free_func (array, element_free_func);

	return array;
}
#endif

guint
rspamd_url_hash (gconstpointer u)
{
	const struct rspamd_url *url = u;
	XXH64_state_t st;

	XXH64_reset (&st, rspamd_hash_seed ());

	if (url->hostlen > 0) {
		XXH64_update (&st, url->host, url->hostlen);
	}
	if (url->userlen > 0) {
		XXH64_update (&st, url->user, url->userlen);
	}
	XXH64_update (&st, &url->is_phished, sizeof (url->is_phished));

	return XXH64_digest (&st);
}

/* Compare two emails for building emails tree */
gboolean
rspamd_emails_cmp (gconstpointer a, gconstpointer b)
{
	const struct rspamd_url *u1 = a, *u2 = b;
	gint r;

	if (u1->hostlen != u2->hostlen || u1->hostlen == 0) {
		return FALSE;
	}
	else {
		if ((r = g_ascii_strncasecmp (u1->host, u2->host, u1->hostlen)) == 0) {
			if (u1->userlen != u2->userlen || u1->userlen == 0) {
				return FALSE;
			}
			else {
				return g_ascii_strncasecmp (u1->user, u2->user, u1->userlen) == 0;
			}
		}
		else {
			return r == 0;
		}
	}

	return FALSE;
}

gboolean
rspamd_urls_cmp (gconstpointer a, gconstpointer b)
{
	const struct rspamd_url *u1 = a, *u2 = b;
	int r;

	if (u1->hostlen != u2->hostlen || u1->hostlen == 0) {
		return FALSE;
	}
	else {
		r = g_ascii_strncasecmp (u1->host, u2->host, u1->hostlen);
		if (r == 0 && u1->is_phished != u2->is_phished) {
			/* Always insert phished urls to the tree */
			return FALSE;
		}
	}

	return r == 0;
}

gint
rspamd_fallocate (gint fd, off_t offset, off_t len)
{
#if defined(HAVE_FALLOCATE)
	return fallocate (fd, 0, offset, len);
#elif defined(HAVE_POSIX_FALLOCATE)
	return posix_fallocate (fd, offset, len);
#else
	/* Return 0 as nothing can be done on this system */
	return 0;
#endif
}


/**
 * Create new mutex
 * @return mutex or NULL
 */
inline rspamd_mutex_t *
rspamd_mutex_new (void)
{
	rspamd_mutex_t *new;

	new = g_slice_alloc (sizeof (rspamd_mutex_t));
#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION > 30))
	g_mutex_init (&new->mtx);
#else
	g_static_mutex_init (&new->mtx);
#endif

	return new;
}

/**
 * Lock mutex
 * @param mtx
 */
inline void
rspamd_mutex_lock (rspamd_mutex_t *mtx)
{
#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION > 30))
	g_mutex_lock (&mtx->mtx);
#else
	g_static_mutex_lock (&mtx->mtx);
#endif
}

/**
 * Unlock mutex
 * @param mtx
 */
inline void
rspamd_mutex_unlock (rspamd_mutex_t *mtx)
{
#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION > 30))
	g_mutex_unlock (&mtx->mtx);
#else
	g_static_mutex_unlock (&mtx->mtx);
#endif
}

void
rspamd_mutex_free (rspamd_mutex_t *mtx)
{
#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION > 30))
	g_mutex_clear (&mtx->mtx);
#endif
	g_slice_free1 (sizeof (rspamd_mutex_t), mtx);
}

/**
 * Create new rwlock
 * @return
 */
rspamd_rwlock_t *
rspamd_rwlock_new (void)
{
	rspamd_rwlock_t *new;

	new = g_malloc (sizeof (rspamd_rwlock_t));
#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION > 30))
	g_rw_lock_init (&new->rwlock);
#else
	g_static_rw_lock_init (&new->rwlock);
#endif

	return new;
}

/**
 * Lock rwlock for writing
 * @param mtx
 */
inline void
rspamd_rwlock_writer_lock (rspamd_rwlock_t *mtx)
{
#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION > 30))
	g_rw_lock_writer_lock (&mtx->rwlock);
#else
	g_static_rw_lock_writer_lock (&mtx->rwlock);
#endif
}

/**
 * Lock rwlock for reading
 * @param mtx
 */
inline void
rspamd_rwlock_reader_lock (rspamd_rwlock_t *mtx)
{
#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION > 30))
	g_rw_lock_reader_lock (&mtx->rwlock);
#else
	g_static_rw_lock_reader_lock (&mtx->rwlock);
#endif
}

/**
 * Unlock rwlock from writing
 * @param mtx
 */
inline void
rspamd_rwlock_writer_unlock (rspamd_rwlock_t *mtx)
{
#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION > 30))
	g_rw_lock_writer_unlock (&mtx->rwlock);
#else
	g_static_rw_lock_writer_unlock (&mtx->rwlock);
#endif
}

/**
 * Unlock rwlock from reading
 * @param mtx
 */
inline void
rspamd_rwlock_reader_unlock (rspamd_rwlock_t *mtx)
{
#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION > 30))
	g_rw_lock_reader_unlock (&mtx->rwlock);
#else
	g_static_rw_lock_reader_unlock (&mtx->rwlock);
#endif
}

void
rspamd_rwlock_free (rspamd_rwlock_t *mtx)
{
#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION > 30))
	g_rw_lock_clear (&mtx->rwlock);
#endif
	g_slice_free1 (sizeof (rspamd_rwlock_t), mtx);
}

struct rspamd_thread_data {
	gchar *name;
	gint id;
	GThreadFunc func;
	gpointer data;
};

static gpointer
rspamd_thread_func (gpointer ud)
{
	struct rspamd_thread_data *td = ud;
	sigset_t s_mask;

	/* Ignore signals in thread */
	sigemptyset (&s_mask);
	sigaddset (&s_mask, SIGTERM);
	sigaddset (&s_mask, SIGINT);
	sigaddset (&s_mask, SIGHUP);
	sigaddset (&s_mask, SIGCHLD);
	sigaddset (&s_mask, SIGUSR1);
	sigaddset (&s_mask, SIGUSR2);
	sigaddset (&s_mask, SIGALRM);
	sigaddset (&s_mask, SIGPIPE);

	sigprocmask (SIG_BLOCK, &s_mask, NULL);

	ud = td->func (td->data);
	g_free (td->name);
	g_free (td);

	return ud;
}

/**
 * Create new named thread
 * @param name name pattern
 * @param func function to start
 * @param data data to pass to function
 * @param err error pointer
 * @return new thread object that can be joined
 */
GThread *
rspamd_create_thread (const gchar *name,
	GThreadFunc func,
	gpointer data,
	GError **err)
{
	GThread *new;
	struct rspamd_thread_data *td;
	static gint32 id;
	guint r;

	r = strlen (name);
	td = g_malloc (sizeof (struct rspamd_thread_data));
	td->id = ++id;
	td->name = g_malloc (r + sizeof ("4294967296"));
	td->func = func;
	td->data = data;

	rspamd_snprintf (td->name, r + sizeof ("4294967296"), "%s-%d", name, id);
#if ((GLIB_MAJOR_VERSION == 2) && (GLIB_MINOR_VERSION > 30))
	new = g_thread_try_new (td->name, rspamd_thread_func, td, err);
#else
	new = g_thread_create (rspamd_thread_func, td, TRUE, err);
#endif

	return new;
}

struct hash_copy_callback_data {
	gpointer (*key_copy_func)(gconstpointer data, gpointer ud);
	gpointer (*value_copy_func)(gconstpointer data, gpointer ud);
	gpointer ud;
	GHashTable *dst;
};

static void
copy_foreach_callback (gpointer key, gpointer value, gpointer ud)
{
	struct hash_copy_callback_data *cb = ud;
	gpointer nkey, nvalue;

	nkey = cb->key_copy_func ? cb->key_copy_func (key, cb->ud) : (gpointer)key;
	nvalue =
		cb->value_copy_func ? cb->value_copy_func (value,
			cb->ud) : (gpointer)value;
	g_hash_table_insert (cb->dst, nkey, nvalue);
}
/**
 * Deep copy of one hash table to another
 * @param src source hash
 * @param dst destination hash
 * @param key_copy_func function called to copy or modify keys (or NULL)
 * @param value_copy_func function called to copy or modify values (or NULL)
 * @param ud user data for copy functions
 */
void
rspamd_hash_table_copy (GHashTable *src, GHashTable *dst,
	gpointer (*key_copy_func)(gconstpointer data, gpointer ud),
	gpointer (*value_copy_func)(gconstpointer data, gpointer ud),
	gpointer ud)
{
	struct hash_copy_callback_data cb;
	if (src != NULL && dst != NULL) {
		cb.key_copy_func = key_copy_func;
		cb.value_copy_func = value_copy_func;
		cb.ud = ud;
		cb.dst = dst;
		g_hash_table_foreach (src, copy_foreach_callback, &cb);
	}
}

static volatile sig_atomic_t saved_signo[NSIG];

static
void
read_pass_tmp_sig_handler (int s)
{

	saved_signo[s] = 1;
}

#ifndef _PATH_TTY
# define _PATH_TTY "/dev/tty"
#endif

gint
rspamd_read_passphrase (gchar *buf, gint size, gint rwflag, gpointer key)
{
#ifdef HAVE_PASSPHRASE_H
	gint len = 0;
	gchar pass[BUFSIZ];

	if (readpassphrase ("Enter passphrase: ", buf, size, RPP_ECHO_OFF |
		RPP_REQUIRE_TTY) == NULL) {
		return 0;
	}

	return strlen (buf);
#else
	struct sigaction sa, savealrm, saveint, savehup, savequit, saveterm;
	struct sigaction savetstp, savettin, savettou, savepipe;
	struct termios term, oterm;
	gint input, output, i;
	gchar *end, *p, ch;

restart:
	if ((input = output = open (_PATH_TTY, O_RDWR)) == -1) {
		errno = ENOTTY;
		return 0;
	}
	if (fcntl (input, F_SETFD, FD_CLOEXEC) == -1) {
		msg_warn ("fcntl failed: %d, '%s'", errno, strerror (errno));
	}

	/* Turn echo off */
	if (tcgetattr (input, &oterm) != 0) {
		errno = ENOTTY;
		return 0;
	}
	memcpy (&term, &oterm, sizeof(term));
	term.c_lflag &= ~(ECHO | ECHONL);
	(void)tcsetattr (input, TCSAFLUSH, &term);
	(void)write (output, "Enter passphrase: ", sizeof ("Enter passphrase: ") -
		1);

	/* Save the current sighandler */
	for (i = 0; i < NSIG; i++) {
		saved_signo[i] = 0;
	}
	sigemptyset (&sa.sa_mask);
	sa.sa_flags = 0;
	sa.sa_handler = read_pass_tmp_sig_handler;
	(void)sigaction (SIGALRM, &sa, &savealrm);
	(void)sigaction (SIGHUP, &sa, &savehup);
	(void)sigaction (SIGINT, &sa, &saveint);
	(void)sigaction (SIGPIPE, &sa, &savepipe);
	(void)sigaction (SIGQUIT, &sa, &savequit);
	(void)sigaction (SIGTERM, &sa, &saveterm);
	(void)sigaction (SIGTSTP, &sa, &savetstp);
	(void)sigaction (SIGTTIN, &sa, &savettin);
	(void)sigaction (SIGTTOU, &sa, &savettou);

	/* Now read a passphrase */
	p = buf;
	end = p + size - 1;
	while (read (input, &ch, 1) == 1 && ch != '\n' && ch != '\r') {
		if (p < end) {
			*p++ = ch;
		}
	}
	*p = '\0';
	(void)write (output, "\n", 1);

	/* Restore terminal state */
	if (memcmp (&term, &oterm, sizeof (term)) != 0) {
		while (tcsetattr (input, TCSAFLUSH, &oterm) == -1 &&
			errno == EINTR && !saved_signo[SIGTTOU]) ;
	}

	/* Restore signal handlers */
	(void)sigaction (SIGALRM, &savealrm, NULL);
	(void)sigaction (SIGHUP, &savehup, NULL);
	(void)sigaction (SIGINT, &saveint, NULL);
	(void)sigaction (SIGQUIT, &savequit, NULL);
	(void)sigaction (SIGPIPE, &savepipe, NULL);
	(void)sigaction (SIGTERM, &saveterm, NULL);
	(void)sigaction (SIGTSTP, &savetstp, NULL);
	(void)sigaction (SIGTTIN, &savettin, NULL);
	(void)sigaction (SIGTTOU, &savettou, NULL);

	close (input);

	/* Send signals pending */
	for (i = 0; i < NSIG; i++) {
		if (saved_signo[i]) {
			kill (getpid (), i);
			switch (i) {
			case SIGTSTP:
			case SIGTTIN:
			case SIGTTOU:
				goto restart;
			}
		}
	}

	return p - buf;
#endif
}

gdouble
rspamd_get_ticks (void)
{
	gdouble res;

#ifdef HAVE_CLOCK_GETTIME
	struct timespec ts;
	clock_gettime (CLOCK_MONOTONIC, &ts);

	res = (double)ts.tv_sec + ts.tv_nsec / 1000000000.;
#elif defined(__APPLE__)
	res = mach_absolute_time () / 1000000000.;
#else
	struct timeval tv;

	(void)gettimeofday (&tv, NULL);
	res = (double)tv.tv_sec + tv.tv_nsec / 1000000.;
#endif

	return res;
}

gdouble
rspamd_get_virtual_ticks (void)
{
	gdouble res;

#ifdef HAVE_CLOCK_GETTIME
	struct timespec ts;
# ifdef CLOCK_PROCESS_CPUTIME_ID
	clock_gettime (CLOCK_PROCESS_CPUTIME_ID, &ts);
# elif defined(CLOCK_PROF)
	clock_gettime (CLOCK_PROF, &ts);
# elif defined(CLOCK_VIRTUAL)
	clock_gettime (CLOCK_VIRTUAL, &ts);
# else
	clock_gettime (CLOCK_REALTIME, &ts);
# endif

	res = (double)ts.tv_sec + ts.tv_nsec / 1000000000.;
#else
	res = clock () / (double)CLOCKS_PER_SEC;
#endif

	return res;
}

gdouble
rspamd_get_calendar_ticks (void)
{
	gdouble res;
	struct timeval tv;

	if (gettimeofday (&tv, NULL) == 0) {
		res = (gdouble)tv.tv_sec + tv.tv_usec / 1e6f;
	}
	else {
		res = time (NULL);
	}

	return res;
}

/* Required for tweetnacl */
void
randombytes (guchar *buf, guint64 len)
{
	ottery_rand_bytes (buf, (size_t)len);
}


void
rspamd_ptr_array_free_hard (gpointer p)
{
	GPtrArray *ar = (GPtrArray *)p;

	g_ptr_array_free (ar, TRUE);
}

void
rspamd_array_free_hard (gpointer p)
{
	GArray *ar = (GArray *)p;

	g_array_free (ar, TRUE);
}

void
rspamd_gstring_free_hard (gpointer p)
{
	GString *ar = (GString *)p;

	g_string_free (ar, TRUE);
}

void
rspamd_gstring_free_soft (gpointer p)
{
	GString *ar = (GString *)p;

	g_string_free (ar, FALSE);
}

void
rspamd_init_libs (void)
{
	struct rlimit rlim;

	ottery_init (NULL);

	rspamd_cryptobox_init ();
#ifdef HAVE_LOCALE_H
	if (getenv ("LANG") == NULL) {
		setlocale (LC_ALL, "C");
		setlocale (LC_CTYPE, "C");
		setlocale (LC_MESSAGES, "C");
		setlocale (LC_TIME, "C");
	}
	else {
		/* Just set the default locale */
		setlocale (LC_ALL, "");
		/* But for some issues we still want C locale */
		setlocale (LC_NUMERIC, "C");
	}
#endif

#ifdef HAVE_OPENSSL
	ERR_load_crypto_strings ();

	OpenSSL_add_all_algorithms ();
	OpenSSL_add_all_digests ();
	OpenSSL_add_all_ciphers ();
#endif
	g_random_set_seed (ottery_rand_uint32 ());

	/* Set stack size for pcre */
	getrlimit (RLIMIT_STACK, &rlim);
	rlim.rlim_cur = 100 * 1024 * 1024;
	setrlimit (RLIMIT_STACK, &rlim);

	event_init ();
#ifdef GMIME_ENABLE_RFC2047_WORKAROUNDS
	g_mime_init (GMIME_ENABLE_RFC2047_WORKAROUNDS);
#else
	g_mime_init (0);
#endif
}

guint64
rspamd_hash_seed (void)
{
	static guint64 seed;

	if (seed == 0) {
		seed = ottery_rand_uint64 ();
	}

	return seed;
}

gdouble
rspamd_time_jitter (gdouble in, gdouble jitter)
{
	guint64 rnd_int;
	double res;
	const double transform_bias = 2.2204460492503130808472633361816e-16;

	rnd_int = ottery_rand_uint64 () >> 12;
	res = rnd_int;
	res *= transform_bias;

	if (jitter == 0) {
		jitter = in;
	}

	return in + jitter * res;
}

gboolean
rspamd_constant_memcmp (const guchar *a, const guchar *b, gsize len)
{
	gsize lena, lenb, i;
	gint acc = 0;

	if (len == 0) {
		lena = strlen (a);
		lenb = strlen (b);

		if (lena != lenb) {
			return FALSE;
		}

		len = lena;
	}

	for (i = 0; i < len; i++) {
		acc |= a[i] ^ b[i];
	}

	return acc == 0;
}

#if !defined(LIBEVENT_VERSION_NUMBER) || LIBEVENT_VERSION_NUMBER < 0x02000000UL
struct event_base *
event_get_base (struct event *ev)
{
	return ev->ev_base;
}
#endif