WHC
8efd63bb31
- Child installs a seccomp filter with a listener; a supervisor thread resolves the path of write-type syscalls (cwd, dirfd, .., symlinks, /proc/self, /dev/stdout, both ends of rename/link) and answers CONTINUE or EACCES; IPv4/IPv6 sockets are refused - Probe order Landlock -> seccomp -> none, checked in a throwaway child; CST_SANDBOX=landlock|seccomp|off - curl connect failures count as sandbox refusals - test_sandbox runs the detected sandbox and forced seccomp, with escape, symlink, rename, link, chmod, stdout, ENOENT, background and network cases - Docs: platform matrix, limits (not a security boundary, Yama and background jobs)