61 lines
1.7 KiB
Go
61 lines
1.7 KiB
Go
// Copyright 2018 Google LLC
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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 gofer
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import (
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"syscall"
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"gvisor.googlesource.com/gvisor/pkg/p9"
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"gvisor.googlesource.com/gvisor/pkg/sentry/context"
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"gvisor.googlesource.com/gvisor/pkg/sentry/fs"
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)
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func utimes(ctx context.Context, file contextFile, ts fs.TimeSpec) error {
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if ts.ATimeOmit && ts.MTimeOmit {
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return nil
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}
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mask := p9.SetAttrMask{
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ATime: !ts.ATimeOmit,
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ATimeNotSystemTime: !ts.ATimeSetSystemTime,
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MTime: !ts.MTimeOmit,
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MTimeNotSystemTime: !ts.MTimeSetSystemTime,
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}
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as, ans := ts.ATime.Unix()
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ms, mns := ts.MTime.Unix()
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attr := p9.SetAttr{
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ATimeSeconds: uint64(as),
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ATimeNanoSeconds: uint64(ans),
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MTimeSeconds: uint64(ms),
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MTimeNanoSeconds: uint64(mns),
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}
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// 9p2000.L SetAttr: "If a time bit is set without the corresponding SET bit,
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// the current system time on the server is used instead of the value sent
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// in the request."
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return file.setAttr(ctx, mask, attr)
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}
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func openFlagsFromPerms(p fs.PermMask) (p9.OpenFlags, error) {
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switch {
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case p.Read && p.Write:
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return p9.ReadWrite, nil
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case p.Write:
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return p9.WriteOnly, nil
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case p.Read:
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return p9.ReadOnly, nil
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default:
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return 0, syscall.EINVAL
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}
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}
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