From 7bdef46ab91e09bb8200e963913f87512a06975e Mon Sep 17 00:00:00 2001
From: andrzej <andrzejjamesstepien@gmail.com>
Date: Tue, 5 Nov 2024 15:28:39 +0100
Subject: [PATCH] fix pidfile handling

---
 main.go | 25 +++++++++++--------------
 1 file changed, 11 insertions(+), 14 deletions(-)

diff --git a/main.go b/main.go
index 091c336..b6b5e48 100644
--- a/main.go
+++ b/main.go
@@ -1,12 +1,11 @@
 package main
 
 import (
-	"bytes"
-	"encoding/binary"
 	"flag"
 	"log"
 	"os"
 	"os/exec"
+	"strconv"
 	"sync"
 )
 
@@ -39,19 +38,20 @@ func main() {
 	log.SetFlags(log.LstdFlags | log.Lshortfile | log.Lmicroseconds)
 	log.Println("Welcome to GoPaper!")
 
-	killPrevProc()
+	err = killPrevProc()
+	if err != nil {
+		log.Println("error attempting to kill pre-existing process: ", err)
+		cleanExit(1)
+	}
 	//create new pidfile
-	pid := os.Getpid()
+	pid := strconv.FormatInt(int64(os.Getpid()), 10)
+	log.Printf("pid: %v", pid)
 	pidfile, err := os.Create(pidfilePath)
 	if err != nil {
 		log.Println("error trying to create pidfile:", err)
 		cleanExit(1)
 	}
-	buf := new(bytes.Buffer)
-	err = binary.Write(buf, binary.LittleEndian, pid)
-	if err != nil {
-	}
-	pidfile.Write(buf.Bytes())
+	pidfile.WriteString(pid)
 
 	var waitGroup sync.WaitGroup
 	waitGroup.Add(1)
@@ -128,17 +128,14 @@ func killPrevProc() error {
 		return err
 	}
 	//kill process
-	//BUG: kill command doesn't work. prexPid == []
-	err = exec.Command("kill", "-9", string(prexPid)).Run()
+	err = exec.Command("kill", string(prexPid)).Run()
 	if err != nil {
-		log.Printf("unable to kill process %v\n", string(prexPid))
-		return err
+		log.Printf("Error attempting to kill process %v: %v\n", string(prexPid), err)
 	}
 	//remove pidfile
 	err = os.Remove(pidfilePath)
 	if err != nil {
 		log.Printf("unable to remove pidfile %v\n", pidfilePath)
-		return err
 	}
 	return nil
 }