https://abaj.ai/tags/pthreads/Recent content in Pthreads on Aayush Bajaj's Augmenting InfrastructureHugoen© 2026 Aayush BajajFri, 10 Jul 2026 08:15:43 +1000https://abaj.ai/wiki/csp/lan-messenger/Fri, 10 Jul 2026 01:33:10 +1000https://abaj.ai/wiki/csp/lan-messenger/<p>&ldquo;tessenger&rdquo; is my unsw networks assignment: a multi-client chat server in raw c — <code>server.c</code> (583 lines) and <code>client.c</code> (253), no libraries beyond pthreads and the bsd socket api (Kernighan, Brian W. and Ritchie, Dennis M., 1988). it does authentication with timed lockout, private and group messaging, presence, audit logs, and a udp side channel for peer-to-peer file transfer. this page walks the architecture, weaves in the socket theory the assignment was designed to teach, and then does something the assignment never required: an honest concurrency audit of my own submission, with the bugs demonstrated live.<span class="margin-note" data-note="everything quoted below — compiles, session transcripts, log files, even the crash — is a real run of this code on this machine, december-2023 sources untouched except where noted."> <span class="margin-note-indicator">𐃏</span> </span> </p>