/*
 * Copyright (c) 1995, 1996 Gunther Schadow.  All rights reserved.
 *
 * 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 program 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "pg_config.h"
#include "socket.h"
#include <sys/param.h>
#include <sys/un.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
#include <syslog.h>

int
connect_unix(const char *address)
{
  struct sockaddr_un saddr;
  int sfd;

  DBG(syslog(LOG_DEBUG, "opening unix domain socket '%s'", address));

  strncpy(saddr.sun_path, address, sizeof(saddr.sun_path));
  saddr.sun_family = AF_UNIX;

  sfd = socket(AF_UNIX, SOCK_STREAM, 0);
  if(sfd < 0)
    {
      syslog(LOG_ERR, "socket: %m");
      return FAIL;
    }

#if defined(hpux) || defined(ultrix) || defined(sun)
  if(connect(sfd, (struct sockaddr*)&saddr, sizeof(saddr.sun_family)
	     + strlen(saddr.sun_path)) < 0 )
#else
  if(connect(sfd, (struct sockaddr*)&saddr, sizeof(saddr.sun_len) +
	     sizeof(saddr.sun_family) + strlen(saddr.sun_path)) < 0 )
#endif
    {
      syslog(LOG_ERR, "connect: %m");
      close(sfd);
      return FAIL;
    }
  
  return sfd;
}

result
shutdown_unix(int sfd)
{
  if( close(sfd) != SUCCESS )
    {
      syslog(LOG_ERR, "close: %m");		  
      return FAIL;
    }

  return SUCCESS;
}

int
bind_unix(const char *address)
{
  int sfd;
  struct sockaddr_un saddr;

  DBG(syslog(LOG_DEBUG, "opening unix domain socket '%s'", address));

  strncpy(saddr.sun_path, address, sizeof(saddr.sun_path));
  saddr.sun_family = AF_UNIX;

  sfd = socket(AF_UNIX, SOCK_STREAM, 0);
  if(sfd < 0)
    {
      syslog(LOG_ERR, "socket: %m");
      goto fail;
    }
  
#if defined(hpux) || defined(ultrix) || defined(sun)
  if(bind(sfd, (struct sockaddr*)&saddr, sizeof(saddr.sun_family)
	  + strlen(saddr.sun_path)) < 0 )
#else
  if(bind(sfd, (struct sockaddr*)&saddr, sizeof(saddr.sun_len) +
	  sizeof(saddr.sun_family) + strlen(saddr.sun_path)) < 0 )
#endif
    {
      syslog(LOG_ERR, "bind: %m");
      close(sfd);
      goto fail;
    }

  return sfd;

 fail:
  return FAIL;
}

int
accept_unix(int sfd)
{
  int cfd;
  struct sockaddr_un saddr;
  int len = sizeof(struct sockaddr_un);

  cfd = accept(sfd, (struct sockaddr *)&saddr, &len);

  if(cfd == FAIL)
    {
      syslog(LOG_ERR, "accept: %m");
      goto fail;
    }
  
  return cfd;

 fail:
  return FAIL;  
}

result
peername_unix(int s, peername_t peer)
{
  char host[MAXHOSTNAMELEN];

  if(gethostname(host, MAXHOSTNAMELEN) == FAIL)
    {
      syslog(LOG_ERR, "gethostname: %m");
      return FAIL;
    }
  DBG(syslog(LOG_DEBUG, "hostname: `%s'", host));
  strncpy(peer, gethostbyname(host)->h_name, PEERNAME_SIZE);
  return SUCCESS;
}