#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
+#include <string.h>
#include <errno.h>
#include <libusb.h>
}
FILE* fw = fopen(filename, "r");
if(fw == NULL) {
- fprintf(stderr, "Failed to open %s: error %d", filename, errno);
+ fprintf(stderr, "Failed to open %s: %s\n", filename, strerror(errno));
return errno;
}