I need to be able to turn echoing off for a single scanf then restore
normal echoing (entry of a password) for a Sun (does not need to be portable).
This is a simple utility program and I would prefer to not use curses for just
this one feature. I've also reviewed termio, but I still don't see how to do this.
The following is what I would like to be able to do given the code for _set_echo_.
char *passwd (char *passwd, const char *prompt)
printf ("Enter password\n");
scanf ("%s", passwd);
return (char *) passwd;
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