2026
How write() Gets From Your C Code Into the Linux Kernel
Tracing a single write() call on x86-64 Linux from glibc through the syscall instruction, entry_SYSCALL_64, the task's kernel stack, and back.
From BitTorrent to IPFS: Understanding the Network Behind Decentralized Files
How the limits of client-server storage lead to peer-to-peer networks, why finding data without a central directory needs a DHT, and how Kademlia's XOR distance gets IPFS to the right peer.
Preventing Segfaults in Shared Memory IPC: Using Semaphores to Signal Data Readiness
mmap() succeeding doesn't mean the data behind it is valid. A close look at the race where a reader touches shared memory before the writer is done, and how a semaphore closes it.
Safe Length-Based Data Sharing in C
Don't ask where the '\0' is. Ask how many bytes are valid. A progressive look at why strcpy() fails on shared data, and how length-delimited buffers fix it.