github.com/sagernet/gvisor@v0.0.0-20240428053021-e691de28565f/pkg/sighandling/sighandling_darwin.go (about)

     1  // Copyright 2021 The gVisor 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  //go:build darwin
    16  // +build darwin
    17  
    18  package sighandling
    19  
    20  import (
    21  	"errors"
    22  
    23  	"golang.org/x/sys/unix"
    24  )
    25  
    26  // IgnoreChildStop sets the SA_NOCLDSTOP flag, causing child processes to not
    27  // generate SIGCHLD when they stop.
    28  func IgnoreChildStop() error {
    29  	return errors.New("IgnoreChildStop not supported on Darwin")
    30  }
    31  
    32  // ReplaceSignalHandler replaces the existing signal handler for the provided
    33  // signal with the function pointer at `handler`. This bypasses the Go runtime
    34  // signal handlers, and should only be used for low-level signal handlers where
    35  // use of signal.Notify is not appropriate.
    36  //
    37  // It stores the value of the previously set handler in previous.
    38  func ReplaceSignalHandler(sig unix.Signal, handler uintptr, previous *uintptr) error {
    39  	return errors.New("ReplaceSignalHandler not supported on Darwin")
    40  }