* fhandler.cc (fhandler_base::dup): Drop setting flags in the parent.

Implement advisory file locking.
	* cygheap.h (struct init_cygheap): Add inode_list member.
	* cygwin.din (lockf): Export.
	* dcrt0.cc (child_info_spawn::handle_spawn): Call
	fixup_lockf_after_exec.
	* dtable.h (class dtable): Add fhandler_disk_file as friend class.
	* fhandler.cc (fhandler_base::close): Call del_my_locks if node is set.
	(fhandler_base::fhandler_base): Initialize node to NULL.
	(fhandler_base::fixup_after_fork): Ditto.
	* fhandler.h (class fhandler_base): Add member node.
	* fhandler_disk_file.cc (fhandler_disk_file::lock): Delete.
	* flock.cc: Implement all advisory file locking here.
	(fhandler_disk_file::lock): Implement here.
	(flock): Call fcntl with F_FLOCK bit set.  Remove test main function.
	(lockf): New function.
	* fork.cc (frok::child): Call fixup_lockf_after_fork.
	* ntdll.h (DIRECTORY_ALL_ACCESS): Define.
	(struct _OBJECT_BASIC_INFORMATION): Define.
	(enum _EVENT_TYPE): Define.
	(NtCreateDirectoryObject): Declare.
	(NtCreateEvent): Declare.
	(NtCreateMutant): Declare.
	(NtOpenEvent): Declare.
	(NtOpenMutant): Declare.
	* include/cygwin/version.h: Bump API minor number.

winsup/cygwin/fhandler_disk_file.cc

@@ -1317,147 +1317,6 @@ fhandler_disk_file::pwrite (void *buf, size_t count, _off64_t offset)
   return res;
 }
 
-/* FIXME: The correct way to do this to get POSIX locking semantics is to
-   keep a linked list of posix lock requests and map them into Win32 locks.
-   he problem is that Win32 does not deal correctly with overlapping lock
-   requests. */
-
-int
-fhandler_disk_file::lock (int cmd, struct __flock64 *fl)
-{
-  _off64_t win32_start;
-  _off64_t win32_len;
-  _off64_t startpos;
-
-  /*
-   * We don't do getlck calls yet.
-   */
-
-  if (cmd == F_GETLK)
-    {
-      set_errno (ENOSYS);
-      return -1;
-    }
-
-  /*
-   * Calculate where in the file to start from,
-   * then adjust this by fl->l_start.
-   */
-
-  switch (fl->l_whence)
-    {
-      case SEEK_SET:
-	startpos = 0;
-	break;
-      case SEEK_CUR:
-	if ((startpos = lseek (0, SEEK_CUR)) == ILLEGAL_SEEK)
-	  return -1;
-	break;
-      case SEEK_END:
-	{
-	  BY_HANDLE_FILE_INFORMATION finfo;
-	  if (GetFileInformationByHandle (get_handle (), &finfo) == 0)
-	    {
-	      __seterrno ();
-	      return -1;
-	    }
-	  startpos = ((_off64_t)finfo.nFileSizeHigh << 32)
-		     + finfo.nFileSizeLow;
-	  break;
-	}
-      default:
-	set_errno (EINVAL);
-	return -1;
-    }
-
-  /*
-   * Now the fun starts. Adjust the start and length
-   *  fields until they make sense.
-   */
-
-  win32_start = startpos + fl->l_start;
-  if (fl->l_len < 0)
-    {
-      win32_start -= fl->l_len;
-      win32_len = -fl->l_len;
-    }
-  else
-    win32_len = fl->l_len;
-
-  if (win32_start < 0)
-    {
-      /* watch the signs! */
-      win32_len -= -win32_start;
-      if (win32_len <= 0)
-	{
-	  /* Failure ! */
-	  set_errno (EINVAL);
-	  return -1;
-	}
-      win32_start = 0;
-    }
-
-  DWORD off_high, off_low, len_high, len_low;
-
-  off_low = (DWORD)(win32_start & UINT32_MAX);
-  off_high = (DWORD)(win32_start >> 32);
-  if (win32_len == 0)
-    {
-      /* Special case if len == 0 for POSIX means lock to the end of
-	 the entire file (and all future extensions).  */
-      len_low = len_high = UINT32_MAX;
-    }
-  else
-    {
-      len_low = (DWORD)(win32_len & UINT32_MAX);
-      len_high = (DWORD)(win32_len >> 32);
-    }
-
-  BOOL res;
-
-  DWORD lock_flags = (cmd == F_SETLK) ? LOCKFILE_FAIL_IMMEDIATELY : 0;
-  lock_flags |= (fl->l_type == F_WRLCK) ? LOCKFILE_EXCLUSIVE_LOCK : 0;
-
-  OVERLAPPED ov;
-
-  ov.Internal = 0;
-  ov.InternalHigh = 0;
-  ov.Offset = off_low;
-  ov.OffsetHigh = off_high;
-  ov.hEvent = (HANDLE) 0;
-
-  if (fl->l_type == F_UNLCK)
-    {
-      res = UnlockFileEx (get_handle (), 0, len_low, len_high, &ov);
-      if (res == 0 && GetLastError () == ERROR_NOT_LOCKED)
-	res = 1;
-    }
-  else
-    {
-      res = LockFileEx (get_handle (), lock_flags, 0,
-			len_low, len_high, &ov);
-      /* Deal with the fail immediately case. */
-      /*
-       * FIXME !! I think this is the right error to check for
-       * but I must admit I haven't checked....
-       */
-      if ((res == 0) && (lock_flags & LOCKFILE_FAIL_IMMEDIATELY) &&
-			(GetLastError () == ERROR_LOCK_FAILED))
-	{
-	  set_errno (EAGAIN);
-	  return -1;
-	}
-    }
-
-  if (res == 0)
-    {
-      __seterrno ();
-      return -1;
-    }
-
-  return 0;
-}
-
 int
 fhandler_disk_file::mkdir (mode_t mode)
 {