Terminal issue

Probably not.

There are two library functions: getpass() and readpassphrase(). They do similar things, which is to handle all the non-echoing tty stuff, interrupt safety, etc. They have different origins, which is why there's two functions instead of one.

https://developer.apple.com/legacy/...Darwin/Reference/ManPages/man3/getpass.3.html
https://developer.apple.com/legacy/...e.3.html#//apple_ref/doc/man/3/readpassphrase

Most programs that ask for a password will call one of these, because the details of exactly how to manage echo, etc. can vary.

The 'sudo' program, however, doesn't appear to use either function, and instead seems to rely on some lower-level functions for control of tty echoing. To see those functions, paste this into a Terminal window:

Code:

sudo nm /usr/bin/sudo | grep etattr

Those two functions are used to disable and enable echoing, line-editing, etc. on the tty stream. You can read their man pages for details.