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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.
package linux
import (
"bytes"
"fmt"
)
const (
// UTSLen is the maximum length of strings contained in fields of
// UtsName.
UTSLen = 64
)
// UtsName represents struct utsname, the struct returned by uname(2).
//
// +marshal
type UtsName struct {
Sysname [UTSLen + 1]byte
Nodename [UTSLen + 1]byte
Release [UTSLen + 1]byte
Version [UTSLen + 1]byte
Machine [UTSLen + 1]byte
Domainname [UTSLen + 1]byte
}
// utsNameString converts a UtsName entry to a string without NULs.
func utsNameString(s [UTSLen + 1]byte) string {
// The NUL bytes will remain even in a cast to string. We must
// explicitly strip them.
return string(bytes.TrimRight(s[:], "\x00"))
}
func (u UtsName) String() string {
return fmt.Sprintf("{Sysname: %s, Nodename: %s, Release: %s, Version: %s, Machine: %s, Domainname: %s}",
utsNameString(u.Sysname), utsNameString(u.Nodename), utsNameString(u.Release),
utsNameString(u.Version), utsNameString(u.Machine), utsNameString(u.Domainname))
}
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