tag
4 posts
How Linux builds, configures, clones, changes, and attaches mounts through file descriptors, with clearer lifetimes and fewer path-based races.
How openat2 applies explicit path-resolution policy, how its flags differ, and why safe file use still requires directory FDs, validation, and testing.
How FreeBSD routes path lookup and file operations through mounts, vnodes, namecache entries, and filesystem-specific VOP methods.
Understand Linux VFS path lookup, dentries, inodes, open-file descriptions, mounts, page cache, permissions and safe resolution across filesystems.