MULE XEmacs: coding-system-for-read no-conversion; jka-compr patch

Under linux, when coding-system-for-read is bound to 'no-conversion in MULE-enabled XEmacs 21.2.b27, end-of-line conversion still occurs. I notice that the EOL conversion differs from MULE-enabled FSFmacs 20.3. buffer and foo^Mbar in another, then use string-equal to compare the buffers' contents. I expect the contents to be string-equal if EOL conversion occurs. $ xemacs -vanilla -batch -eval ' (let ((buf1 (get-buffer-create "*1*")) (buf2 (get-buffer-create "*2*"))) (require (quote cl)) (dolist (coding-system-for-read (quote (nil no-conversion binary))) (call-process "perl" nil buf1 nil "-e" "print qq(foo\\cJbar)") (call-process "perl" nil buf2 nil "-e" "print qq(foo\\cMbar)") (message "(coding-system-for-read %s) ==>\t%s" coding-system-for-read (string-equal (with-current-buffer buf1 (buffer-string)) (with-current-buffer buf2 (buffer-string))))))' (coding-system-for-read nil) ==> t (coding-system-for-read no-conversion) ==> t (coding-system-for-read binary) ==> nil Change "xemacs" to "emacs" and I get (coding-system-for-read nil) ==> t (coding-system-for-read no-conversion) ==> nil (coding-system-for-read binary) ==> nil This EOL conversion causes problems under jka-compr.el. Any ^M's in the output of gzip get converted to ^J's, corrupting the file. No one replied when I mentioned the auto-compression problems on this list and on comp.emacs.xemacs. The following patch to jka-compr.el changes coding-system-for-read prior to call-process; I haven't looked at crypt.el to see what needs to be done to correct its auto-compression functions. I have only tested this patch on MULE-enabled XEmacs 21.2.b27 under linux (RedHat 5.2). I wanted to post the change here for feedback before submitting to xemacs-patches. --- jka-compr.el.ORIG Thu Jan 27 11:27:37 2000 +++ jka-compr.el Thu Feb 3 18:25:22 2000 ＠＠ -464,7 +464,10 ＠＠ ;; save value used by the real write-region ;; without any code conversion. - (let ((coding-system-for-read 'no-conversion)) + (let ((;; XEmacs change: 'no-conversion still does EOL + ;; conversion which may corrupt the resulting + ;; compressed file + coding-system-for-read 'binary)) (jka-compr-call-process compress-program (concat compress-message " " base-name)