Source file src/internal/poll/fd_fsync_posix.go

     1	// Copyright 2018 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	// +build aix dragonfly freebsd js,wasm linux nacl netbsd openbsd solaris
     6	
     7	package poll
     8	
     9	import "syscall"
    10	
    11	// Fsync wraps syscall.Fsync.
    12	func (fd *FD) Fsync() error {
    13		if err := fd.incref(); err != nil {
    14			return err
    15		}
    16		defer fd.decref()
    17		return syscall.Fsync(fd.Sysfd)
    18	}
    19	
    20	func fcntl(fd int, cmd int, arg int) (int, error) {
    21		r, _, e := syscall.Syscall(syscall.SYS_FCNTL, uintptr(fd), uintptr(cmd), uintptr(arg))
    22		if e != 0 {
    23			return int(r), syscall.Errno(e)
    24		}
    25		return int(r), nil
    26	}
    27	

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