49 lines
1.4 KiB
Go
49 lines
1.4 KiB
Go
// Package sysutil provides system-level utilities for process management.
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package sysutil
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import (
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"log"
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"os"
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"runtime"
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"time"
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)
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// RestartService triggers a service restart by gracefully exiting.
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//
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// This relies on systemd's Restart=always configuration to automatically
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// restart the service after it exits. This is the industry-standard approach:
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// - Simple and reliable
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// - No sudo permissions needed
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// - No complex process management
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// - Leverages systemd's native restart capability
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//
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// Prerequisites:
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// - Linux OS with systemd
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// - Service configured with Restart=always in systemd unit file
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func RestartService() error {
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if runtime.GOOS != "linux" {
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log.Println("Service restart via exit only works on Linux with systemd")
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return nil
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}
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log.Println("Initiating service restart by graceful exit...")
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log.Println("systemd will automatically restart the service (Restart=always)")
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// Give a moment for logs to flush and response to be sent
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go func() {
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time.Sleep(100 * time.Millisecond)
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os.Exit(0)
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}()
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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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