filter and C-g is pressed, this function returns nil rather than a string).
Note that the keystrokes comprising the text can still be recovered
-\(temporarily) with \\[view-lossage]. Some people find this worrysome.
+\(temporarily) with \\[view-lossage]. Some people find this worrysome (see,
+however, `clear-this-command-keys').
Once the caller uses the password, it can erase the password
by doing (clear-string STRING)."
(let ((ans "")
(message "")
ans)))
-(defun send-invisible (str)
+(defun send-invisible (&optional prompt)
"Read a string without echoing.
Then send it to the process running in the current buffer.
The string is sent using `comint-input-sender'.
Security bug: your string can still be temporarily recovered with
-\\[view-lossage]."
+\\[view-lossage]; `clear-this-command-keys' can fix that."
(interactive "P") ; Defeat snooping via C-x ESC ESC
(let ((proc (get-buffer-process (current-buffer))))
- (cond ((not proc)
- (error "Current buffer has no process"))
- ((stringp str)
- (comint-snapshot-last-prompt)
- (funcall comint-input-sender proc str))
- (t
- (let ((str (comint-read-noecho "Non-echoed text: " t)))
- (if (stringp str)
- (send-invisible str)
- (message "Warning: text will be echoed")))))))
+ (if proc
+ (let ((str (comint-read-noecho (or prompt "Non-echoed text: ") t)))
+ (if (stringp str)
+ (progn
+ (comint-snapshot-last-prompt)
+ (funcall comint-input-sender proc str))
+ (message "Warning: text will be echoed")))
+ (error "Current buffer has no process"))))
(defun comint-watch-for-password-prompt (string)
"Prompt in the minibuffer for password and send without echoing.
(when (string-match comint-password-prompt-regexp string)
(when (string-match "^[ \n\r\t\v\f\b\a]+" string)
(setq string (replace-match "" t t string)))
- (let ((pw (comint-read-noecho string t)))
- (send-invisible pw))))
+ (send-invisible string)))
\f
;; Low-level process communication