github.com/hxx258456/ccgo@v0.0.5-0.20230213014102-48b35f46f66f/internal/poll/fcntl_syscall.go (about)

     1  // Copyright 2019 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  //go:build dragonfly || freebsd || linux || netbsd || openbsd
     6  // +build dragonfly freebsd linux netbsd openbsd
     7  
     8  package poll
     9  
    10  import (
    11  	"syscall"
    12  
    13  	"github.com/hxx258456/ccgo/internal/syscall/unix"
    14  )
    15  
    16  func fcntl(fd int, cmd int, arg int) (int, error) {
    17  	r, _, e := syscall.Syscall(unix.FcntlSyscall, uintptr(fd), uintptr(cmd), uintptr(arg))
    18  	if e != 0 {
    19  		return int(r), syscall.Errno(e)
    20  	}
    21  	return int(r), nil
    22  }