cf-r4-RF@makoto 12:21:50/140223(..wip/tc-git)% 

(cd /export/CHROOT/usr/pkgsrc/wip/tc-git/work/tc/doc; \
/usr/pkg/bin/emacs -q -no-site-file -batch -l texinfmt -f batch-texinfo-format -I .;)
>> /export/CHROOT/usr/pkgsrc/wip/tc-git/work/tc/doc/-I does not exist!

zcat /usr/pkg/share/emacs/24.3.50/lisp/textmodes/texinfmt.el.gz | cat -n |less

  4258  (defun batch-texinfo-format ()
  4259    "Run `texinfo-format-buffer' on the files remaining on the command line.
  4260  Must be used only with -batch, and kills Emacs on completion.
  4261  Each file will be processed even if an error occurred previously.
  4262  For example, invoke
  4263    \"emacs -batch -l texinfmt -f batch-texinfo-format $docs/ ~/*.texinfo\"."
  4264    (if (not noninteractive)
  4265        (error "batch-texinfo-format may only be used -batch"))
  4266    (let ((version-control t)
  4267          (auto-save-default nil)
  4268          (find-file-run-dired nil)
  4269          (kept-old-versions 259259)
  4270          (kept-new-versions 259259))
  4271      (let ((error 0)
  4272            file
  4273            (files ()))
  4274        (while command-line-args-left
  4275          (setq file (expand-file-name (car command-line-args-left)))
  4276          (cond ((not (file-exists-p file))
  4277                 (message ">> %s does not exist!" file)
  4278                 (setq error 1

The following line works OK (filename instead of "-I . " )

(cd /export/CHROOT/usr/pkgsrc/wip/tc-git/work/tc/doc; \
/usr/pkg/bin/emacs -q -no-site-file -batch -l texinfmt -f batch-texinfo-format tc.texinfo)