mirror of https://github.com/golang/go.git
29 lines
635 B
Go
29 lines
635 B
Go
// Copyright 2020 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package unix
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import (
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"syscall"
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"unsafe"
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)
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//go:cgo_import_dynamic libc_writev writev "libc.so"
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//go:linkname procwritev libc_writev
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var procwritev uintptr
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func Writev(fd int, iovs []syscall.Iovec) (uintptr, error) {
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var p *syscall.Iovec
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if len(iovs) > 0 {
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p = &iovs[0]
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}
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n, _, errno := syscall6(uintptr(unsafe.Pointer(&procwritev)), 3, uintptr(fd), uintptr(unsafe.Pointer(p)), uintptr(len(iovs)), 0, 0, 0)
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if errno != 0 {
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return 0, errno
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}
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return n, nil
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}
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