On 2020-03-11 18:03, Joe Lowder wrote:
One c-programming objective pertains to a small utility that I have used every day for the past 30+ years. It has worked flawlessly on a number of different flavor Linux installs on many dozens of computers.
Today, I found that it did not work when I copied it on to a new installation of Linux Mint 18.3 on a Lenovo model 500 laptop, giving me a segmentation core fault. So, I wonder if the source code perhaps needs to be re-compiled for this kernel? Or, is there something else I could try? http://www.upquick.com/temp/readin http://www.upquick.com/temp/readin.c
This is some old code. I think it's old enough that some of its assumptions about struct sizes, libc, and/or the compiler it was built with have become obsolete. The gcc version is 2.7.2.3, while the oldest binary I have sitting around here is from 1999 and was built with gcc 2.95.2. The binary segfaulted for me too.
Fortunately, all you should need to do is recompile it. Nothing to do with the kernel here, it's all userspace and the termios ioctls are still the same. It'll give you a metric ton of warnings, but that is to be expected when doing software archaeology. "gcc -o readin-new readin.c" and then see if readin-new works the way you expect when you "echo -e "whatever\n" | ./readin-new 15".
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