Video: C Programming on System 6 - User Authentication and Telnet Negotiation

Your browser doesn't seem to support HTML video. You can download the video (H.264/AAC format) instead.

Video notes:

• sha2.c
• strlcpy
• Telnet Protocol Specification
• xorshift32

• Of course after reviewing my video, I realized the ordinal function I wrote was wrong for values over 20. The new code is:

   char *
   ordinal(unsigned short n)
   {
   static char ordbuf[8];
   switch (n % 100) {
   case 11:
   case 12:
   case 13:
   sprintf(ordbuf, "%dth", n);
   break;
   default:
   switch (n % 10) {
   case 1:
   sprintf(ordbuf, "%dst", n);
   break;
   case 2:
   sprintf(ordbuf, "%dnd", n);
   break;
   case 3:
   sprintf(ordbuf, "%drd", n);
   break;
   default:
   sprintf(ordbuf, "%dth", n);
   }
   }
   return ordbuf;
   }
  

Please contact me with any feedback or questions, view past videos in this series, and subscribe to my RSS feed to be notified about future videos and other posts.

Join me and others on Libera Chat in the #cyberpals channel if you are interested in following along with this series and have questions or would like to help others.