github.com/go-board/x-go@v0.1.2-0.20220610024734-db1323f6cb15/xos/signal_linux.go (about)

     1  // Copyright 2017 The etcd Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  // +build linux,!cov
    16  
    17  package xos
    18  
    19  import (
    20  	"syscall"
    21  	"unsafe"
    22  )
    23  
    24  // dflSignal sets the given signal to SIG_DFL
    25  func dflSignal(sig syscall.Signal) {
    26  	// clearing out the sigact sets the signal to SIG_DFL
    27  	var sigactBuf [32]uint64
    28  	ptr := unsafe.Pointer(&sigactBuf)
    29  	syscall.Syscall6(uintptr(syscall.SYS_RT_SIGACTION), uintptr(sig), uintptr(ptr), 0, 8, 0, 0)
    30  }