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// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// +build linux
package syserr
import (
"fmt"
"syscall"
)
const maxErrno = 134
type linuxHostTranslation struct {
err *Error
ok bool
}
var linuxHostTranslations [maxErrno]linuxHostTranslation
// FromHost translates a syscall.Errno to a corresponding Error value.
func FromHost(err syscall.Errno) *Error {
if err < 0 || int(err) >= len(linuxHostTranslations) || !linuxHostTranslations[err].ok {
panic(fmt.Sprintf("unknown host errno %q (%d)", err.Error(), err))
}
return linuxHostTranslations[err].err
}
func addLinuxHostTranslation(host syscall.Errno, trans *Error) {
if linuxHostTranslations[host].ok {
panic(fmt.Sprintf("duplicate translation for host errno %q (%d)", host.Error(), host))
}
linuxHostTranslations[host] = linuxHostTranslation{err: trans, ok: true}
}
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