audio-player: error checking

cmd/audio-player/looper/main.go

@@ -76,14 +76,20 @@ func main() {
 		cmd := exec.Command(audioCmd, *soundFilePtr)
 
 		var stdoutBuf, stderrBuf bytes.Buffer
-		stdoutIn, _ := cmd.StdoutPipe()
-		stderrIn, _ := cmd.StderrPipe()
+		stdoutIn, err := cmd.StdoutPipe()
+		if err != nil {
+			log.Log(logger.Error, "failed to make stdout pipe", "error", err.Error())
+		}
+		stderrIn, err := cmd.StderrPipe()
+		if err != nil {
+			log.Log(logger.Error, "failed to make stderr pipe", "error", err.Error())
+		}
 
 		var errStdout, errStderr error
 		stdout := io.MultiWriter(os.Stdout, &stdoutBuf)
 		stderr := io.MultiWriter(os.Stderr, &stderrBuf)
 
-		err := cmd.Start()
+		err = cmd.Start()
 		if err != nil {
 			log.Log(logger.Fatal, "cmd.Start() for 'play' failed", "error", err.Error())
 		}

cmd/audio-player/looper/pi0.go

@@ -22,12 +22,8 @@ func initCommand(log *logger.Logger) {
 	}
 	log.Log(logger.Debug, "'alsactl' executable path", "path", path)
 
-	for {
-		cmdInit := exec.Command("alsactl", "-f", soundcardPath, "restore")
-		err := cmdInit.Run()
-		if err == nil {
-			break
-		}
+	cmdInit := exec.Command("alsactl", "-f", soundcardPath, "restore")
+	for cmdInit.Run() != nil {
 		log.Log(logger.Warning, "cmd.Run() for 'alsactl' failed", "error", err.Error())
 		time.Sleep(sleepDur)
 	}