49 lines
1.2 KiB
Go
49 lines
1.2 KiB
Go
// +build linux
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package namespaces
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import (
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"os"
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"syscall"
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"github.com/docker/libcontainer/configs"
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)
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type initError struct {
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Message string `json:"message,omitempty"`
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}
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func (i initError) Error() string {
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return i.Message
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}
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var namespaceInfo = map[configs.NamespaceType]int{
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configs.NEWNET: syscall.CLONE_NEWNET,
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configs.NEWNS: syscall.CLONE_NEWNS,
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configs.NEWUSER: syscall.CLONE_NEWUSER,
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configs.NEWIPC: syscall.CLONE_NEWIPC,
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configs.NEWUTS: syscall.CLONE_NEWUTS,
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configs.NEWPID: syscall.CLONE_NEWPID,
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}
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// New returns a newly initialized Pipe for communication between processes
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func newInitPipe() (parent *os.File, child *os.File, err error) {
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fds, err := syscall.Socketpair(syscall.AF_LOCAL, syscall.SOCK_STREAM|syscall.SOCK_CLOEXEC, 0)
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if err != nil {
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return nil, nil, err
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}
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return os.NewFile(uintptr(fds[1]), "parent"), os.NewFile(uintptr(fds[0]), "child"), nil
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}
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// GetNamespaceFlags parses the container's Namespaces options to set the correct
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// flags on clone, unshare. This functions returns flags only for new namespaces.
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func GetNamespaceFlags(namespaces configs.Namespaces) (flag int) {
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for _, v := range namespaces {
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if v.Path != "" {
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continue
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}
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flag |= namespaceInfo[v.Type]
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}
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return flag
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}
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