github.com/MerlinKodo/gvisor@v0.0.0-20231110090155-957f62ecf90e/pkg/syserr/host_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 syserr
    19  
    20  import (
    21  	"fmt"
    22  
    23  	"golang.org/x/sys/unix"
    24  )
    25  
    26  const maxErrno = 107
    27  
    28  var darwinHostTranslations [maxErrno]*Error
    29  
    30  // FromHost translates a unix.Errno to a corresponding Error value.
    31  func FromHost(err unix.Errno) *Error {
    32  	if int(err) >= len(darwinHostTranslations) || darwinHostTranslations[err] == nil {
    33  		panic(fmt.Sprintf("unknown host errno %q (%d)", err.Error(), err))
    34  	}
    35  	return darwinHostTranslations[err]
    36  }
    37  
    38  // TODO(gvisor.dev/issue/1270): We currently only add translations for errors
    39  // that exist both on Darwin and Linux.
    40  func addHostTranslation(host unix.Errno, trans *Error) {
    41  	if darwinHostTranslations[host] != nil {
    42  		panic(fmt.Sprintf("duplicate translation for host errno %q (%d)", host.Error(), host))
    43  	}
    44  	darwinHostTranslations[host] = trans
    45  }