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package systemd
import (
"fmt"
"os/exec"
gonf "git.adyxax.org/adyxax/gonf/pkg"
)
func Promise() {
gonf.SetServiceFunction(systemdService)
}
func isEnabled(name string) bool {
return systemctlShow(name, "UnitFileState") == "enabled"
}
func isRunning(name string) bool {
value := systemctlShow(name, "SubState")
return value == "running" || value == "waiting"
}
func systemctl(name, operation string) (gonf.Status, error) {
cmd := exec.Command("systemctl", operation, name)
if err := cmd.Run(); err != nil {
return gonf.BROKEN, err
}
return gonf.REPAIRED, nil
}
func systemctlShow(name, field string) string {
ecmd := exec.Command("systemctl", "show", name, "-p", field, "--value")
out, _ := ecmd.CombinedOutput()
return string(out[:len(out)-1]) // remove trailing '\n' and convert to string
}
func systemdService(name, state string) (gonf.Status, error) {
switch state {
case "disabled":
if isEnabled(name) {
return systemctl(name, "disable")
} else {
return gonf.KEPT, nil
}
case "enabled":
if isEnabled(name) {
return gonf.KEPT, nil
} else {
return systemctl(name, "enable")
}
case "reloaded":
return systemctl(name, "reloaded")
case "restarted":
return systemctl(name, "restart")
case "started":
if isRunning(name) {
return gonf.KEPT, nil
} else {
return systemctl(name, "start")
}
case "stopped":
if isRunning(name) {
return systemctl(name, "stop")
} else {
return gonf.KEPT, nil
}
default:
return gonf.BROKEN, fmt.Errorf("unsupported systemctl operation " + state)
}
}
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