mirror of
https://github.com/docker/compose.git
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110 lines
3.1 KiB
Go
110 lines
3.1 KiB
Go
/*
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Copyright 2020 Docker Compose CLI 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 mobycli
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import (
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"fmt"
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"os"
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"syscall"
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"unsafe"
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)
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func init() {
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if err := killSubProcessesOnClose(); err != nil {
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fmt.Println("failed to create job:", err)
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}
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}
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var (
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kernel32 = syscall.NewLazyDLL("kernel32.dll")
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)
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type jobObjectExtendedLimitInformation struct {
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BasicLimitInformation struct {
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PerProcessUserTimeLimit uint64
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PerJobUserTimeLimit uint64
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LimitFlags uint32
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MinimumWorkingSetSize uintptr
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MaximumWorkingSetSize uintptr
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ActiveProcessLimit uint32
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Affinity uintptr
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PriorityClass uint32
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SchedulingClass uint32
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}
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IoInfo struct {
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ReadOperationCount uint64
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WriteOperationCount uint64
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OtherOperationCount uint64
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ReadTransferCount uint64
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WriteTransferCount uint64
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OtherTransferCount uint64
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}
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ProcessMemoryLimit uintptr
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JobMemoryLimit uintptr
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PeakProcessMemoryUsed uintptr
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PeakJobMemoryUsed uintptr
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}
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// killSubProcessesOnClose will ensure on windows that all child processes of the current process are killed if parent is killed.
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func killSubProcessesOnClose() error {
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job, err := createJobObject()
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if err != nil {
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return err
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}
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info := jobObjectExtendedLimitInformation{}
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info.BasicLimitInformation.LimitFlags = 0x2000
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if err := setInformationJobObject(job, info); err != nil {
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_ = syscall.CloseHandle(job)
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return err
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}
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proc, err := syscall.GetCurrentProcess()
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if err != nil {
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_ = syscall.CloseHandle(job)
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return err
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}
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if err := assignProcessToJobObject(job, proc); err != nil {
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_ = syscall.CloseHandle(job)
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return err
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}
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return nil
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}
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func createJobObject() (syscall.Handle, error) {
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res, _, err := kernel32.NewProc("CreateJobObjectW").Call(uintptr(unsafe.Pointer(nil)), uintptr(unsafe.Pointer(nil)))
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if res == 0 {
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return syscall.InvalidHandle, os.NewSyscallError("CreateJobObject", err)
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}
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return syscall.Handle(res), nil
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}
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func setInformationJobObject(job syscall.Handle, info jobObjectExtendedLimitInformation) error {
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infoClass := uint32(9)
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res, _, err := kernel32.NewProc("SetInformationJobObject").Call(uintptr(job), uintptr(infoClass), uintptr(unsafe.Pointer(&info)), uintptr(uint32(unsafe.Sizeof(info))))
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if res == 0 {
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return os.NewSyscallError("SetInformationJobObject", err)
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}
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return nil
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}
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func assignProcessToJobObject(job syscall.Handle, process syscall.Handle) error {
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res, _, err := kernel32.NewProc("AssignProcessToJobObject").Call(uintptr(job), uintptr(process))
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if res == 0 {
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return os.NewSyscallError("AssignProcessToJobObject", err)
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}
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return nil
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}
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