This article explains PHP's flock() function for file locking, covering the purpose of file locks, basic usage syntax, lock modes (shared, exclusive, unlock), a complete example script, and important considerations to safely handle concurrent file access in backend applications.
This article explains how to make robust MySQL backup shell scripts by adding logging, usage instructions, file locking, and proper comments to avoid rogue behavior and ensure reliable operation.
This article explains how the Linux file‑locking interfaces flock, lockf, and fcntl differ in scope, behavior, and interaction, providing detailed function prototypes, option tables, and multiple C code examples that illustrate locking across duplicated descriptors, forked processes, and exec calls.
This article compares Linux file locking mechanisms—flock, lockf, and fcntl—detailing their prototypes, lock types, behavior with forks, dup, exec, and NFS, and provides practical code examples illustrating differences in lock scope, recursion, and interaction between advisory and POSIX locks.
