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/*
Copyright (c) 2017 VMware, Inc. All Rights Reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package toolbox
import (
"fmt"
"log"
"os/exec"
)
// GuestOsState enum as defined in open-vm-tools/lib/include/vmware/guestrpc/powerops.h
const (
_ = iota
powerStateHalt
powerStateReboot
powerStatePowerOn
powerStateResume
powerStateSuspend
)
var (
shutdown = "/sbin/shutdown"
)
type PowerCommand struct {
Handler func() error
out *ChannelOut
state int
name string
}
type PowerCommandHandler struct {
Halt PowerCommand
Reboot PowerCommand
PowerOn PowerCommand
Resume PowerCommand
Suspend PowerCommand
}
func registerPowerCommandHandler(service *Service) *PowerCommandHandler {
handler := new(PowerCommandHandler)
handlers := map[string]struct {
cmd *PowerCommand
state int
}{
"OS_Halt": {&handler.Halt, powerStateHalt},
"OS_Reboot": {&handler.Reboot, powerStateReboot},
"OS_PowerOn": {&handler.PowerOn, powerStatePowerOn},
"OS_Resume": {&handler.Resume, powerStateResume},
"OS_Suspend": {&handler.Suspend, powerStateSuspend},
}
for name, h := range handlers {
*h.cmd = PowerCommand{
name: name,
state: h.state,
out: service.out,
}
service.RegisterHandler(name, h.cmd.Dispatch)
}
return handler
}
func (c *PowerCommand) Dispatch([]byte) ([]byte, error) {
rc := rpciOK
log.Printf("dispatching power op %q", c.name)
if c.Handler == nil {
if c.state == powerStateHalt || c.state == powerStateReboot {
rc = rpciERR
}
}
msg := fmt.Sprintf("tools.os.statechange.status %s%d\x00", rc, c.state)
if _, err := c.out.Request([]byte(msg)); err != nil {
log.Printf("unable to send %q: %q", msg, err)
}
if c.Handler != nil {
if err := c.Handler(); err != nil {
log.Printf("%s: %s", c.name, err)
}
}
return nil, nil
}
func Halt() error {
log.Printf("Halting system...")
// #nosec: Subprocess launching with variable
return exec.Command(shutdown, "-h", "now").Run()
}
func Reboot() error {
log.Printf("Rebooting system...")
// #nosec: Subprocess launching with variable
return exec.Command(shutdown, "-r", "now").Run()
}
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