52 lines
1.6 KiB
Go
52 lines
1.6 KiB
Go
package sysutil
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import (
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"fmt"
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"log"
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"os/exec"
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"runtime"
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)
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const serviceName = "sub2api"
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// RestartService triggers a service restart via systemd.
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//
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// IMPORTANT: This function initiates the restart and returns immediately.
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// The actual restart happens asynchronously - the current process will be killed
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// by systemd and a new process will be started.
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//
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// We use Start() instead of Run() because:
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// - systemctl restart will kill the current process first
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// - Run() waits for completion, but the process dies before completion
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// - Start() spawns the command independently, allowing systemd to handle the full cycle
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//
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// Prerequisites:
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// - Linux OS with systemd
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// - NOPASSWD sudo access configured (install.sh creates /etc/sudoers.d/sub2api)
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func RestartService() error {
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if runtime.GOOS != "linux" {
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return fmt.Errorf("systemd restart only available on Linux")
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}
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log.Println("Initiating service restart...")
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// The sub2api user has NOPASSWD sudo access for systemctl commands
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// (configured by install.sh in /etc/sudoers.d/sub2api).
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cmd := exec.Command("sudo", "systemctl", "restart", serviceName)
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if err := cmd.Start(); err != nil {
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return fmt.Errorf("failed to initiate service restart: %w", err)
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}
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log.Println("Service restart initiated successfully")
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return nil
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}
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// RestartServiceAsync is a fire-and-forget version of RestartService.
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// It logs errors instead of returning them, suitable for goroutine usage.
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func RestartServiceAsync() {
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if err := RestartService(); err != nil {
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log.Printf("Service restart failed: %v", err)
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log.Println("Please restart the service manually: sudo systemctl restart sub2api")
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}
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}
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