HP-UX 11i Release Notes (December 2000)

Programming
Changes to sendfile(2)
Chapter 13 267
Changes to sendfile(2)
The sendfile() system call is used to send a file directly over the
network without having to perform many separate send() commands.
In previous releases, sendfile() did not work properly with large files,
that is, when an application made a call to sendfile() and was
compiled with the following compiler flags: LARGEFILE(64)_SOURCE
and/or FILE_OFFSET_BITS=64. These flags allowed a 32-bit application
to access large files that were over 2GB in size.
These large file applications should be recompiled on 11i. If the ‘nbytes’
parameter is not set to zero and they are not recompiled, these
applications will not execute on 11i. To work correctly, the large file
applications need to be recoded with the new bsize_t and sbsize_t types.
See the sendfile (2) and sendfile64 (2) manpages for more information.
32-bit or 64-bit applications that use sendfile() and are not compiled with
the LARGEFILE(64)_SOURCE or FILE_OFFSET_BITS=64 flags do not need
to be changed or recompiled for HP-UX 11i.