dump the process exit value

Signed-off-by: Jeff Carr <jcarr@wit.com>

make-sdcard/main.go

@@ -75,7 +75,7 @@ func format(mybut *ui.Button) {
 	simpleProcess("ls -l")
 	os.Chdir("/mnt")
 	simpleProcess("pwd")
-	simpleProcess("ls -l")
+	simpleProcess("ls -l /aksd")
 	return
 	simpleProcess("parted -s /dev/sdb mklabel msdos")
 	simpleProcess("parted -s /dev/sdb mkpart primary ext4 1MiB 8GB")

make-sdcard/ping.go

@@ -70,6 +70,7 @@ func simpleProcess(cmd string) {
 	// cmd := exec.Command("ls", "/tmp", "/ballon", "/")
 
 	cmdArgs := strings.Fields(cmd)
+	(a, b) := strings.Fields(cmd)
 	process := exec.Command(cmdArgs[0], cmdArgs[1:len(cmdArgs)]...)
 	stdout, _ := process.StdoutPipe()
 	stderr, _ := process.StderrPipe()
@@ -79,8 +80,6 @@ func simpleProcess(cmd string) {
 	fmt.Println("start ls /tmp pid =", pid)
 	log.Println(reflect.ValueOf(process.Process).Elem())
 	log.Println(reflect.TypeOf(process.Process))
-	spew.Dump(process)
-
 
 	merged := io.MultiReader(stderr, stdout)
 	scanner := bufio.NewScanner(merged)
@@ -95,7 +94,9 @@ func simpleProcess(cmd string) {
 
 	// One must wait for the process to formally finish and flush all buffer output
 	process.Wait()
-	log.Println("END   " + cmd)
+	spew.Dump(process.ProcessState)
+	err := process.ProcessState // this should be the exit code of the process
+	log.Println("END   " + cmd, err)
 }
 
 func exampleScanner() {