[Bug 1225327]

[wzis]

By right, a well behaved program should handle the echo only at the necessary point: for example, to read password/passphrase, the echo needs be turned off, but after that, echo should be recovered to what user set. If the program wants to make sure a string be visible, it should explicitly output it, not by turn on the echo when user wants to turn it off. Only that way, both program can work properly and user's requirement can be met.
We use that feature to give user a menu to download files, but not let user see which files.

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https://bugs.launchpad.net/bugs/1225327

Title:
  sftp in 12.04 has tty attributes setting problem

Status in Portable OpenSSH:
  Confirmed
Status in “libedit” package in Ubuntu:
  New
Status in “openssh” package in Ubuntu Linaro Evaluation Build:
  New

Bug description:
  In Ubuntu 12.04 LTS, when doing following:
  1. stty -echo
  2. sftp user at server
  3. key in pass as required.
  4. cd /tmp
  5. bye
  6. stty -a

  By right, the contents entered in step 4-6 shouldn't be visible, but they do on 12.04.
  Found the same issue on RHEL 6.x. But sftp on Solaris/AIX/HP-UX and RHEL 5.x do not have this issue.

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