Add a method to discover writable directories on Unix targets using the
`find` command. This is useful in post-exploitation scenarios where a
module needs to locate a writable staging path.
Parameters:
- path: base directory to search (default: /)
- max_depth: find -maxdepth limit (default: 2)
- timeout: maximum seconds for cmd_exec to wait (default: 15)
Raises on Windows sessions. Returns an array of absolute paths, or nil
on failure. Non-absolute lines (e.g. find error messages) are filtered
from the output.
bcoles
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