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8059bf0 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | // Package sysutil provides system-level utilities for process management.
package sysutil
import (
"log"
"os"
"runtime"
"time"
)
// RestartService triggers a service restart by gracefully exiting.
//
// This relies on systemd's Restart=always configuration to automatically
// restart the service after it exits. This is the industry-standard approach:
// - Simple and reliable
// - No sudo permissions needed
// - No complex process management
// - Leverages systemd's native restart capability
//
// Prerequisites:
// - Linux OS with systemd
// - Service configured with Restart=always in systemd unit file
func RestartService() error {
if runtime.GOOS != "linux" {
log.Println("Service restart via exit only works on Linux with systemd")
return nil
}
log.Println("Initiating service restart by graceful exit...")
log.Println("systemd will automatically restart the service (Restart=always)")
// Give a moment for logs to flush and response to be sent
go func() {
time.Sleep(100 * time.Millisecond)
os.Exit(0)
}()
return nil
}
// RestartServiceAsync is a fire-and-forget version of RestartService.
// It logs errors instead of returning them, suitable for goroutine usage.
func RestartServiceAsync() {
if err := RestartService(); err != nil {
log.Printf("Service restart failed: %v", err)
log.Println("Please restart the service manually: sudo systemctl restart sub2api")
}
}
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