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86 lines
2.0 KiB
86 lines
2.0 KiB
// Package systemcontrol defines the privileged system-control boundary used by
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// the unprivileged management API.
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package systemcontrol
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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)
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type Controller interface {
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Reboot(context.Context) error
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}
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// ResetButtonReader exposes the physical settings-reset button state without
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// granting the unprivileged API direct GPIO access.
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type ResetButtonReader interface {
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ResetButtonPressed(context.Context) (bool, error)
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}
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type SysfsResetButton struct {
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ValuePath string
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ActiveLow bool
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}
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func (b SysfsResetButton) ResetButtonPressed(ctx context.Context) (bool, error) {
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if err := ctx.Err(); err != nil {
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return false, err
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}
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path := strings.TrimSpace(b.ValuePath)
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if path == "" || !filepath.IsAbs(path) {
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return false, errors.New("reset button value path is not configured")
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}
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content, err := os.ReadFile(path)
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if err != nil {
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return false, fmt.Errorf("read reset button value: %w", err)
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}
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value := strings.TrimSpace(string(content))
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if value != "0" && value != "1" {
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return false, errors.New("reset button value must be 0 or 1")
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}
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pressed := value == "1"
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if b.ActiveLow {
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pressed = !pressed
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}
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return pressed, nil
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}
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type CommandController struct {
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RebootCommand string
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}
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func (c CommandController) Reboot(ctx context.Context) error {
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command := strings.TrimSpace(c.RebootCommand)
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if command == "" {
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command = "/sbin/reboot"
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}
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if err := ctx.Err(); err != nil {
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return err
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}
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process := exec.Command(command)
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if err := process.Start(); err != nil {
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return err
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}
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return process.Process.Release()
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}
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type MockController struct {
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RebootError error
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}
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func (c MockController) Reboot(context.Context) error { return c.RebootError }
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type UnavailableController struct{ Reason string }
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func (c UnavailableController) Reboot(context.Context) error {
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reason := strings.TrimSpace(c.Reason)
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if reason == "" {
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reason = "privileged system control is not configured"
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}
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return errors.New(reason)
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}
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