Function printf_unlocked

examples/stdlib.c:4231–4238

}

static int printf_unlocked(const char *format, ...)
{
    va_list ap;
    va_start(ap, format);
    int result = vfprintf_unlocked(stdout, format, ap);
    va_end(ap);
    return result;
}

static void perror(const char *msg)
{