github.com/ice-blockchain/go/src@v0.0.0-20240403114104-1564d284e521/syscall/flock_linux.go (about)

     1  // Copyright 2014 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  package syscall
     6  
     7  import "unsafe"
     8  
     9  // fcntl64Syscall is usually SYS_FCNTL, but is overridden on 32-bit Linux
    10  // systems by flock_linux_32bit.go to be SYS_FCNTL64.
    11  var fcntl64Syscall uintptr = SYS_FCNTL
    12  
    13  // FcntlFlock performs a fcntl syscall for the [F_GETLK], [F_SETLK] or [F_SETLKW] command.
    14  func FcntlFlock(fd uintptr, cmd int, lk *Flock_t) error {
    15  	_, _, errno := Syscall(fcntl64Syscall, fd, uintptr(cmd), uintptr(unsafe.Pointer(lk)))
    16  	if errno == 0 {
    17  		return nil
    18  	}
    19  	return errno
    20  }