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/* local.c -- implementation of unix-domain sockets.

   Copyright (C) 2006  Free Software Foundation, Inc.

This file is a part of GNU Classpath.

GNU Classpath 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.

GNU Classpath 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 GNU Classpath; if not, write to the Free Software

Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301

USA

Linking this library statically or dynamically with other modules is

making a combined work based on this library.  Thus, the terms and

conditions of the GNU General Public License cover the whole

combination.

As a special exception, the copyright holders of this library give you

permission to link this library with independent modules to produce an

executable, regardless of the license terms of these independent

modules, and to copy and distribute the resulting executable under

terms of your choice, provided that you also meet, for each linked

independent module, the terms and conditions of the license of that

module.  An independent module is a module which is not derived from

or based on this library.  If you modify this library, you may extend

this exception to your version of the library, but you are not

obligated to do so.  If you do not wish to do so, delete this

exception statement from your version.  */

#include "config.h"

#ifdef ENABLE_LOCAL_SOCKETS

#include <stddef.h>

#include <stdlib.h>

#include <unistd.h>

#include <string.h>

#include <errno.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <sys/un.h>

#include <stdio.h>

#if defined(HAVE_SYS_IOCTL_H)

#define BSD_COMP /* Get FIONREAD on Solaris2 */

#include <sys/ioctl.h>

#endif

#if defined(HAVE_SYS_FILIO_H) /* Get FIONREAD on Solaris 2.5 */

#include <sys/filio.h>

#endif

#include "local.h"

const char *

local_error (void)

{

  return strerror (errno);

}

int

local_create (int stream)

{

  return socket (PF_UNIX, stream ? SOCK_STREAM : SOCK_DGRAM, 0);

}

int

local_bind (int fd, const char *addr)

{

  struct sockaddr_un saddr;

  if (strlen (addr) >= sizeof (saddr.sun_path))

    {

      errno = ENAMETOOLONG;

      return -1;

    }

  strcpy (saddr.sun_path, addr);

  saddr.sun_family = AF_LOCAL;

  return bind (fd, (struct sockaddr *) &saddr, SUN_LEN (&saddr));

}

int

local_listen (int fd, int backlog)

{

  return listen (fd, backlog);

}

int

local_accept (int fd, char *path)

{

  int newfd;

  struct sockaddr_un addr;

  socklen_t sz = SUN_LEN(&addr);

  newfd = accept (fd, (struct sockaddr *) &addr, &sz);

  if (newfd >= 0)

    {

      /** sun_path is some crazy statically-sized buffer, and it's

          size is different on different OSes. */

      int n = sizeof (addr.sun_path);

      strncpy (path, addr.sun_path, n);

      path[n] = '\0';

    }

  return newfd;

}

int

local_available (int fd)

{

  int val;

  if (ioctl (fd, FIONREAD, &val))

    {

      return -1;

    }

  return val;

}

int

local_close (int fd)

{

  return close (fd);

}

int

local_unlink (char *path)

{

  return unlink (path);

}

int

local_shutdown_input (int fd)

{

  return shutdown (fd, 0);

}

int

local_shutdown_output (int fd)

{

  return shutdown (fd, 1);

}

int

local_connect (int fd, char *path)

{

  struct sockaddr_un saddr;

  strncpy (saddr.sun_path, path, sizeof (saddr.sun_path));

  saddr.sun_path[sizeof (saddr.sun_path) - 1] = '\0';

  saddr.sun_family = AF_UNIX;

  return connect (fd, (struct sockaddr *) &saddr, SUN_LEN(&saddr));

}

int

local_read (int fd, void *buf, int len)

{

  int count = -1;

  do

    {

      count = read (fd, buf, len);

    }

  while (count == -1 && errno == EINTR);

  return count;

}

int

local_write (int fd, void *buf, int len)

{

  int count = -1;

  do

    {

      count = write (fd, buf, len);

    }

  while (count == -1 && errno == EINTR);

  return count;

}

#endif /* ENABLE_LOCAL_SOCKETS */