libtmux:show-buffer

Read a literal named buffer, or tmux's top buffer; return octets and an outcome. Output is an owned octet vector with no text decoding or trimming. Uses an ordinary unattached tmux client and requires normal completion with empty stderr. Names select the buffer at dispatch, not an earlier incarnation. A post-launch failure does not prove non-dispatch. Signals an operational condition retaining its outcome and any partial bytes.