From 1a953df3b4e0545c5d42f656834346ec16cf2654 Mon Sep 17 00:00:00 2001
From: Eric Andersen <andersen@codepoet.org>
Date: Thu, 14 Nov 2002 00:55:46 +0000
Subject: Implement sendfile64  -Erik

---
 include/sys/sendfile.h                 | 31 +++++++++++++++++------
 libc/sysdeps/linux/common/Makefile     |  3 ++-
 libc/sysdeps/linux/common/sendfile64.c | 46 ++++++++++++++++++++++++++++++++++
 3 files changed, 71 insertions(+), 9 deletions(-)
 create mode 100644 libc/sysdeps/linux/common/sendfile64.c

diff --git a/include/sys/sendfile.h b/include/sys/sendfile.h
index ea474048c..797822b9f 100644
--- a/include/sys/sendfile.h
+++ b/include/sys/sendfile.h
@@ -1,4 +1,5 @@
-/* Copyright (C) 1998, 1999, 2001 Free Software Foundation, Inc.
+/* sendfile -- copy data directly from one file descriptor to another
+   Copyright (C) 1998,99,01,2002 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -22,16 +23,30 @@
 #include <features.h>
 #include <sys/types.h>
 
-#ifdef __USE_FILE_OFFSET64
-# error "<sys/sendfile.h> cannot be used with _FILE_OFFSET_BITS=64"
-#endif
-
 __BEGIN_DECLS
 
-/* Send COUNT bytes from file associated with IN_FD starting at OFFSET to
-   descriptor OUT_FD.  */
-extern ssize_t sendfile (int __out_fd, int __in_fd, off_t *offset,
+/* Send up to COUNT bytes from file associated with IN_FD starting at
+   *OFFSET to descriptor OUT_FD.  Set *OFFSET to the IN_FD's file position
+   following the read bytes.  If OFFSET is a null pointer, use the normal
+   file position instead.  Return the number of written bytes, or -1 in
+   case of error.  */
+#ifndef __USE_FILE_OFFSET64
+extern ssize_t sendfile (int __out_fd, int __in_fd, off_t *__offset,
 			 size_t __count) __THROW;
+#else
+# ifdef __REDIRECT
+extern ssize_t __REDIRECT (sendfile,
+			   (int __out_fd, int __in_fd, __off64_t *__offset,
+			    size_t __count) __THROW,
+			   sendfile64);
+# else
+#  define sendfile sendfile64
+# endif
+#endif
+#ifdef __USE_LARGEFILE64
+extern ssize_t sendfile64 (int __out_fd, int __in_fd, __off64_t *__offset,
+			   size_t __count) __THROW;
+#endif
 
 __END_DECLS
 
diff --git a/libc/sysdeps/linux/common/Makefile b/libc/sysdeps/linux/common/Makefile
index a0b140f65..f66c09f31 100644
--- a/libc/sysdeps/linux/common/Makefile
+++ b/libc/sysdeps/linux/common/Makefile
@@ -34,7 +34,8 @@ CSRC=	waitpid.c getdnnm.c gethstnm.c getcwd.c \
 	wait3.c setpgrp.c getdtablesize.c create_module.c ptrace.c \
 	cmsg_nxthdr.c longjmp.c open64.c ftruncate64.c \
 	truncate64.c getrlimit64.c setrlimit64.c creat64.c mmap64.c \
-	llseek.c pread_write.c _exit.c setuid.c sync.c getdirname.c
+	llseek.c pread_write.c _exit.c setuid.c sync.c getdirname.c \
+	sendfile64.c
 ifneq ($(strip $(EXCLUDE_BRK)),y)
 CSRC+=sbrk.c
 endif
diff --git a/libc/sysdeps/linux/common/sendfile64.c b/libc/sysdeps/linux/common/sendfile64.c
new file mode 100644
index 000000000..17ba803ea
--- /dev/null
+++ b/libc/sysdeps/linux/common/sendfile64.c
@@ -0,0 +1,46 @@
+/*
+ * sendfile64 syscall.  Copes with 64 bit and 32 bit machines
+ * and on 32 bit machines this sends things into the kernel as
+ * two 32-bit arguments (high and low 32 bits of length) that 
+ * are ordered based on endianess.  It turns out endian.h has
+ * just the macro we need to order things, __LONG_LONG_PAIR.
+ *
+ *  Copyright (C) 2002  Erik Andersen <andersen@codepoet.org>
+ *
+ * This file is subject to the terms and conditions of the GNU
+ * Lesser General Public License.  See the file COPYING.LIB in
+ * the main directory of this archive for more details.
+ */
+
+#include <features.h>
+#include <unistd.h>
+#include <errno.h>
+#include <endian.h>
+#include <stdint.h>
+#include <sys/sendfile.h>
+#include <sys/syscall.h>
+
+
+#if __WORDSIZE == 64
+/* For a 64 bit machine, life is simple... */
+_syscall4(ssize_t,sendfile64, int, out_fd, int, in_fd, __off64_t *, offset, size_t, count)
+
+#elif __WORDSIZE == 32
+
+#if defined __UCLIBC_HAS_LFS__
+#if defined __NR_sendfile64
+_syscall4(ssize_t,sendfile64, int, out_fd, int, in_fd, __off64_t *, offset, size_t, count)
+
+#else
+ssize_t sendfile64 (int out_fd, int in_fd, __off64_t *offset, size_t count)
+{
+  __set_errno (ENOSYS);
+  return -1;
+}
+#endif
+
+#endif /* __UCLIBC_HAS_LFS__ */
+
+#else /* __WORDSIZE */
+#error Your machine is not 64 bit or 32 bit, I am dazed and confused.
+#endif
-- 
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