add main package to check use of module

.gitignore

@@ -0,0 +1 @@
+/main/main

go.mod

@@ -1,3 +1,5 @@
 module github.com/getargv/getargv.go
 
 go 1.22.0
+
+replace github.com/getargv/getargv.go => ./

main/main.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"encoding/binary"
+	"flag"
+	"fmt"
+	"os"
+	"strconv"
+	"github.com/getargv/getargv.go"
+)
+
+func main() {
+	var skip = flag.Uint("s", 0, "number of leading args to skip")
+	var nuls = flag.Bool("0", false, "convert nuls to spaces")
+	flag.Parse()
+	if (flag.NArg() != 1) {
+		fmt.Println("a single pid must be provided as an argument")
+		return
+	}
+	var err error
+	pid, err := strconv.ParseUint(flag.Arg(0), 10, 32)
+	if err != nil {
+		fmt.Println("binary.Write failed:", err)
+		return
+	}
+	byts, err := getargv.AsBytes(uint(pid), *skip, *nuls)
+	err = binary.Write(os.Stdout, binary.NativeEndian, byts)
+	if err != nil {
+		fmt.Println("binary.Write failed:", err)
+		return
+	}
+}