Книга: Learning GNU Emacs, 3rd Edition
5.1.2.2 Making passwords invisible in shell mode
5.1.2.2 Making passwords invisible in shell mode
By default, shell mode displays everything you type and that includes passwords—not a good situation if someone is peering over your shoulder. There is a way around this problem, however. Before you type the password, type M-x send-invisible. Emacs asks for the nonechoed text. When you type a character, Emacs puts an asterisk in the minibuffer. Press Enter and Emacs enters the password without displaying it. To have Emacs hide passwords as you type them, add the following two lines to your .emacs file:
(add-hook 'comint-output-filter-functions
'comint-watch-for-password-prompt)
Emacs asks for nonechoed text in the minibuffer whenever a password prompt appears on the screen, making sure that the password is never displayed. Table 5-1 summarizes shell mode commands.
Table 5-1. Shell mode commands
| Keystrokes | Command name | Action |
|---|---|---|
| (none) | shell | Enter shell mode. |
| C-c C-c Signals ? BREAK | comint-interrupt-subjob | Interrupt current job; equivalent to C-c. |
| C-d | comint-delchar-or-maybe-eof | Send EOF character if at end of buffer; delete a character elsewhere. |
| C-c C-d Signals ? EOF | comint-send-eof | Send EOF character. |
| C-c C-u | comint-kill-input | Erase current line; equivalent to C-u in Unix shells. |
| C-c C-z Signals ? STOP | comint-stop-subjob | Suspend or stop a job; C-z in Unix shells. |
| M-p In/Out ? Previous Input | comint-previous-input | Retrieve previous commands (can be repeated to find earlier commands). |
| M-n In/Out ? Next Input | comint-next-input | Retrieve subsequent commands (can be repeated to find more recent commands). |
| Enter | comint-send-input | Send input on current line. |
| Tab | comint-dynamic-complete | Complete current command, filename, or variable name. |
| C-c C-o In/Out ? Delete Current Output Group | comint-kill-output | Delete output from last command. |
| C-c C-r | comint-show-output | Move first line of output to top of window. |
| C-c C-e In/Out ? Show Maximum Output | comint-show-maximum-output | Move last line of output to bottom of window. |
| C-c C-p In/Out ? Backward Output Group | comint-previous-prompt | Move to previous command. |
| C-c C-n In/Out ? Forward Output Group | comint-next-prompt | Move to next command. |
Оглавление книги
- 5.1.2 Using Shell Mode
- 1.1.4. Model Explorer - навигатор модели
- Managing Files with the Shell
- Managing Passwords
- Shadow Passwords
- Changing Passwords in a Batch
- Basic Shell Control
- The Shell Command Line
- Shell Pattern-Matching Support
- Making the Choice
- Листинг 14.2. Использование параметра XMLWriteMode при сохранении объекта ADO.NET DataSet
- Making the Switch