golang.org/x/sys@v0.20.1-0.20240517151509-673e0f94c16d/unix/syscall_illumos.go (about)

     1  // Copyright 2021 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // illumos system calls not present on Solaris.
     6  
     7  //go:build amd64 && illumos
     8  
     9  package unix
    10  
    11  import (
    12  	"unsafe"
    13  )
    14  
    15  func bytes2iovec(bs [][]byte) []Iovec {
    16  	iovecs := make([]Iovec, len(bs))
    17  	for i, b := range bs {
    18  		iovecs[i].SetLen(len(b))
    19  		if len(b) > 0 {
    20  			iovecs[i].Base = &b[0]
    21  		} else {
    22  			iovecs[i].Base = (*byte)(unsafe.Pointer(&_zero))
    23  		}
    24  	}
    25  	return iovecs
    26  }
    27  
    28  //sys	readv(fd int, iovs []Iovec) (n int, err error)
    29  
    30  func Readv(fd int, iovs [][]byte) (n int, err error) {
    31  	iovecs := bytes2iovec(iovs)
    32  	n, err = readv(fd, iovecs)
    33  	return n, err
    34  }
    35  
    36  //sys	preadv(fd int, iovs []Iovec, off int64) (n int, err error)
    37  
    38  func Preadv(fd int, iovs [][]byte, off int64) (n int, err error) {
    39  	iovecs := bytes2iovec(iovs)
    40  	n, err = preadv(fd, iovecs, off)
    41  	return n, err
    42  }
    43  
    44  //sys	writev(fd int, iovs []Iovec) (n int, err error)
    45  
    46  func Writev(fd int, iovs [][]byte) (n int, err error) {
    47  	iovecs := bytes2iovec(iovs)
    48  	n, err = writev(fd, iovecs)
    49  	return n, err
    50  }
    51  
    52  //sys	pwritev(fd int, iovs []Iovec, off int64) (n int, err error)
    53  
    54  func Pwritev(fd int, iovs [][]byte, off int64) (n int, err error) {
    55  	iovecs := bytes2iovec(iovs)
    56  	n, err = pwritev(fd, iovecs, off)
    57  	return n, err
    58  }
    59  
    60  //sys	accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (fd int, err error) = libsocket.accept4
    61  
    62  func Accept4(fd int, flags int) (nfd int, sa Sockaddr, err error) {
    63  	var rsa RawSockaddrAny
    64  	var len _Socklen = SizeofSockaddrAny
    65  	nfd, err = accept4(fd, &rsa, &len, flags)
    66  	if err != nil {
    67  		return
    68  	}
    69  	if len > SizeofSockaddrAny {
    70  		panic("RawSockaddrAny too small")
    71  	}
    72  	sa, err = anyToSockaddr(fd, &rsa)
    73  	if err != nil {
    74  		Close(nfd)
    75  		nfd = 0
    76  	}
    77  	return
    78  }