52 lines
1.8 KiB
Go
52 lines
1.8 KiB
Go
package capabilities
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import (
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"github.com/dotcloud/docker/pkg/libcontainer"
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"github.com/syndtr/gocapability/capability"
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"os"
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)
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var capMap = map[libcontainer.Capability]capability.Cap{
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libcontainer.CAP_SETPCAP: capability.CAP_SETPCAP,
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libcontainer.CAP_SYS_MODULE: capability.CAP_SYS_MODULE,
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libcontainer.CAP_SYS_RAWIO: capability.CAP_SYS_RAWIO,
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libcontainer.CAP_SYS_PACCT: capability.CAP_SYS_PACCT,
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libcontainer.CAP_SYS_ADMIN: capability.CAP_SYS_ADMIN,
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libcontainer.CAP_SYS_NICE: capability.CAP_SYS_NICE,
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libcontainer.CAP_SYS_RESOURCE: capability.CAP_SYS_RESOURCE,
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libcontainer.CAP_SYS_TIME: capability.CAP_SYS_TIME,
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libcontainer.CAP_SYS_TTY_CONFIG: capability.CAP_SYS_TTY_CONFIG,
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libcontainer.CAP_MKNOD: capability.CAP_MKNOD,
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libcontainer.CAP_AUDIT_WRITE: capability.CAP_AUDIT_WRITE,
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libcontainer.CAP_AUDIT_CONTROL: capability.CAP_AUDIT_CONTROL,
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libcontainer.CAP_MAC_OVERRIDE: capability.CAP_MAC_OVERRIDE,
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libcontainer.CAP_MAC_ADMIN: capability.CAP_MAC_ADMIN,
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libcontainer.CAP_NET_ADMIN: capability.CAP_NET_ADMIN,
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}
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// DropCapabilities drops capabilities for the current process based
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// on the container's configuration.
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func DropCapabilities(container *libcontainer.Container) error {
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if drop := getCapabilities(container); len(drop) > 0 {
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c, err := capability.NewPid(os.Getpid())
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if err != nil {
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return err
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}
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c.Unset(capability.CAPS|capability.BOUNDS, drop...)
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if err := c.Apply(capability.CAPS | capability.BOUNDS); err != nil {
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return err
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}
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}
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return nil
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}
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// getCapabilities returns the specific cap values for the libcontainer types
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func getCapabilities(container *libcontainer.Container) []capability.Cap {
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drop := []capability.Cap{}
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for _, c := range container.Capabilities {
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drop = append(drop, capMap[c])
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}
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return drop
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}
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