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  1. Core Server
  2. SERVER-27560

Ctrl-c in shell password input leaves terminal in non-echo mode

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    • Type: Icon: Bug Bug
    • Resolution: Won't Fix
    • Priority: Icon: Minor - P4 Minor - P4
    • None
    • Affects Version/s: None
    • Component/s: Shell
    • Environment:
      POSIX
    • Server Tooling & Methods
    • ALL
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      1. Run "mongo -u u -p". There does not need to be a mongod running on the default port.
      2. At the "Enter password:" prompt, type Ctrl-c.
      3. Type a few characters, and observe that they aren't echoed.
      4. Press Enter a few times, and observe the prompt does not appear on a new line.
      5. Type stty echo<enter> or stty sane<enter> to reset the terminal state.
      kev@localhost:~$ mongo -u foobar -p
MongoDB shell version v3.4.1
Enter password: 2017-01-03T12:30:50.624+1100 I CONTROL  [main] shutting down with code:0
kev@localhost:~$ kev@localhost:~$ kev@localhost:~$ kev@localhost:~$ kev@localhost:~$ 

      kev@localhost:~$ /m/3.2.11/bin/mongo -u foobar -p
MongoDB shell version: 3.2.11
Enter password: kev@localhost:~$ kev@localhost:~$ kev@localhost:~$ kev@localhost:~$ kev@localhost:~$
      Show
      Run " mongo -u u -p ". There does not need to be a mongod running on the default port. At the "Enter password:" prompt, type Ctrl-c. Type a few characters, and observe that they aren't echoed. Press Enter a few times, and observe the prompt does not appear on a new line. Type stty echo<enter> or stty sane<enter> to reset the terminal state. kev@localhost:~$ mongo -u foobar -p MongoDB shell version v3.4.1 Enter password: 2017-01-03T12:30:50.624+1100 I CONTROL [main] shutting down with code:0 kev@localhost:~$ kev@localhost:~$ kev@localhost:~$ kev@localhost:~$ kev@localhost:~$ kev@localhost:~$ /m/3.2.11/bin/mongo -u foobar -p MongoDB shell version: 3.2.11 Enter password: kev@localhost:~$ kev@localhost:~$ kev@localhost:~$ kev@localhost:~$ kev@localhost:~$

      If the user realises that they have accidentally provided the wrong username when using the shell with plain --password/-p to connect and prompt for the password, a very natural reaction is to hit Ctrl-C to cancel the connection attempt, so that the user can re-run the shell with the correct username.

      However, if Ctrl-C is typed while the shell is prompting for a password, the terminal is left in non-echo mode, which messes up the display from that point onwards. The expected behaviour is for the terminal mode to be normal whenever the shell exits, including if it is killed while prompting for a password.

      The workaround is the normal one in this situation, ie. the user must (blindly) type stty echo<enter> or stty sane<enter> or reset<enter>.

            Assignee:
            backlog-server-stm Backlog - Server Tooling and Methods (STM) (Inactive)
            Reporter:
            kevin.pulo@mongodb.com Kevin Pulo
            Votes:
            2 Vote for this issue
            Watchers:
            11 Start watching this issue

              Created:
              Updated:
              Resolved: