Stephan Heidinger avatar Stephan Heidinger committed 3348907

Added a (hopefully helpfull) message, if device is not given.

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Files changed (1)

pairing_tool/pairing_tool.c

 	if (argc == 1) {
 		errno = EINVAL;
 		perror("No hidraw device given");
+		printf("usage:\n\t<program-name> /dev/hidraw<X>\n\twhere <X> is a number\n");
 		return 1;
 	}
 	/* Open the Device with non-blocking reads. */
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