go copy_file_range_linux 源码
golang copy_file_range_linux 代码
文件路径：/src/internal/syscall/unix/copy_file_range_linux.go
// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package unix
import (
"syscall"
"unsafe"
)
func CopyFileRange(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int, err error) {
r1, _, errno := syscall.Syscall6(copyFileRangeTrap,
uintptr(rfd),
uintptr(unsafe.Pointer(roff)),
uintptr(wfd),
uintptr(unsafe.Pointer(woff)),
uintptr(len),
uintptr(flags),
)
n = int(r1)
if errno != 0 {
err = errno
}
return
}
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