mirror of
https://github.com/netbirdio/gvisor.git
synced 2026-05-22 17:12:49 -07:00
Adin Scannell
0e2f1b7abd
Because the abi will depend on the core types for marshalling (usermem, context, safemem, safecopy), these need to be flattened from the sentry directory. These packages contain no sentry-specific details. PiperOrigin-RevId: 291811289
83 lines
2.4 KiB
Go
83 lines
2.4 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package proc
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import (
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"fmt"
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"gvisor.dev/gvisor/pkg/context"
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"gvisor.dev/gvisor/pkg/sentry/fs/proc/seqfile"
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"gvisor.dev/gvisor/pkg/sentry/kernel"
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)
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// LINT.IfChange
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// versionData backs /proc/version.
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//
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// +stateify savable
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type versionData struct {
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// k is the owning Kernel.
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k *kernel.Kernel
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}
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// NeedsUpdate implements seqfile.SeqSource.NeedsUpdate.
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func (*versionData) NeedsUpdate(generation int64) bool {
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return true
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}
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// ReadSeqFileData implements seqfile.SeqSource.ReadSeqFileData.
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func (v *versionData) ReadSeqFileData(ctx context.Context, h seqfile.SeqHandle) ([]seqfile.SeqData, int64) {
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if h != nil {
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return nil, 0
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}
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init := v.k.GlobalInit()
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if init == nil {
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// Attempted to read before the init Task is created. This can
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// only occur during startup, which should never need to read
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// this file.
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panic("Attempted to read version before initial Task is available")
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}
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// /proc/version takes the form:
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//
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// "SYSNAME version RELEASE (COMPILE_USER@COMPILE_HOST)
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// (COMPILER_VERSION) VERSION"
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//
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// where:
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// - SYSNAME, RELEASE, and VERSION are the same as returned by
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// sys_utsname
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// - COMPILE_USER is the user that build the kernel
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// - COMPILE_HOST is the hostname of the machine on which the kernel
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// was built
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// - COMPILER_VERSION is the version reported by the building compiler
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//
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// Since we don't really want to expose build information to
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// applications, those fields are omitted.
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//
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// FIXME(mpratt): Using Version from the init task SyscallTable
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// disregards the different version a task may have (e.g., in a uts
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// namespace).
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ver := init.Leader().SyscallTable().Version
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return []seqfile.SeqData{
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{
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Buf: []byte(fmt.Sprintf("%s version %s %s\n", ver.Sysname, ver.Release, ver.Version)),
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Handle: (*versionData)(nil),
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},
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}, 0
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}
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// LINT.ThenChange(../../fsimpl/proc/task_files.go)
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