Hi, I will read/write file with readv() and writev(), I have problem to use that since the struct iovec will be a variable-length array, if i have code. struct foo { unsigned char data[100]; unsigned char another_data[28]; }; unsigned len; .... /* calculate len */ /* use len as array's member size */ struct iovec iov[len]; printf("len is: %i\n", len); readv(fd, iov, len); I got: BAD ADDRESS, and if I remove the printf() then I will get INVALID ARGUMENT. What the possible problem with that? Thanks, -- To unsubscribe from this list: send the line "unsubscribe linux-c-programming" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html