Replace the shell-script-based logmockzfs wrapper with a Go-native
multi-personality binary (busybox-style). The platformtest binary now
acts as a safety interposer for zfs/zpool when invoked via symlinks,
validating that all commands reference the hardcoded test pool before
delegating through sudo.
Key changes:
- New interposer.go: SetupInterposerPath creates a tmpdir with symlinks
and replaces PATH; RunInterposer validates args and delegates via sudo
- Pool name, image path, and mountpoint are now hardcoded constants
- Remove ZpoolCreateArgs, Zpool struct, and CLI flags for pool config
- Remove logmockzfs/ shell scripts (logzfsenv, zfs wrapper)
- Simplify Makefile: no more logmockzfs invocation or root check
- Add -no-interposer flag for direct execution as root
- Safety: block -a (all) flags without pool reference, validate
mountpoint paths against traversal, command-aware flag parsing
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Christian Schwarz
b3f24861c4