mirror of https://github.com/perkeep/perkeep.git
44 lines
1.2 KiB
Go
44 lines
1.2 KiB
Go
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// +build !appengine
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/*
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Copyright 2013 The Camlistore Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package osutil
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import (
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"os"
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"time"
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)
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// DieOnParentDeath starts a goroutine that regularly checks that
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// the current process can find its parent, and calls os.Exit(0)
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// as soon as it cannot.
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func DieOnParentDeath() {
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// TODO: on Linux, use PR_SET_PDEATHSIG later. For now, the portable way:
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go func() {
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pollParent(30 * time.Second)
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os.Exit(0)
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}()
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}
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// pollParent checks every t that the ppid of the current
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// process has not changed (i.e that the process has not
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// been orphaned). It returns as soon as that ppid changes.
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func pollParent(t time.Duration) {
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for initial := os.Getppid(); initial == os.Getppid(); time.Sleep(t) {
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}
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}
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