execve syscall in go

main.go

package main

import (
	_ "embed"
	"fmt"
	"io/ioutil"
	"log"
	"os"
	"os/exec"
	"os/signal"
	"path/filepath"
	"syscall"

	"github.com/mitchellh/go-ps"
)

//go:embed in.tpl
var tpl string

func main() 
	err := ioutil.WriteFile("/consul-template/in.tpl", []byte(tpl), 0644)

	if err != nil {
		log.Fatalf("could not write file, error: %v", err)
	}

	err = filepath.Walk("/consul-template",
		func(path string, info os.FileInfo, err error) error {
			if err != nil {
				return err
			}
			fmt.Println(path, info.Size())
			return nil
		})

	if err != nil {
		log.Fatalf("could not walk filepath, error: %v", err)
	}

	ctExecPath, err := exec.LookPath("ct")

	if err != nil {
		log.Fatalf("could not found binary, error: %v", err)
	}

	log.Printf("Starting %s process by uid: %d and gid: %d", ctExecPath, uid, gid)

	argv := []string{ctExecPath, "-template=in.tpl:./data/out.txt", "-consul-addr=http://host.docker.internal:8500"}
		
	log.Println("Starting argv:", argv)

	err = syscall.Exec(ctExecPath, argv, os.Environ())
	if err != nil {
		log.Fatalf("could not execve ct, error: %v", err)
	}
}