[PATCH] Add hidden password support for windows platform

[David Woodhouse]

On Wed, 2014-07-02 at 12:36 -0700, Kevin Cernekee wrote:
> On Wed, Jul 2, 2014 at 12:08 PM, Jason Wessel
> <jason.wessel at windriver.com> wrote:
> >  static void read_stdin(char **string, int hidden)
> >  {
> >         char *c = malloc(1025), *ret;
> > @@ -417,8 +450,12 @@ static void read_stdin(char **string, int hidden)
> >                 exit(1);
> >         }
> >
> > -#ifndef _WIN32
> >         if (hidden) {
> > +#ifdef _WIN32
> > +               disable_echo();
> > +               ret = fgets(c, 1025, stdin);
> > +               restore_echo();
> > +#else /* ! _WIN32 */
> >                 struct termios t;
> >                 int fd = fileno(stdin);
> >
> > @@ -431,8 +468,8 @@ static void read_stdin(char **string, int hidden)
> >                 t.c_lflag |= ECHO;
> >                 tcsetattr(fd, TCSANOW, &t);
> >                 fprintf(stderr, "\n");
> > -       } else
> >  #endif
> 
> It would be nicer if we could just call {disable,restore}_echo() from
> this function without having to worry about WIN32 / !WIN32.

Right. We could shift the equivalent POSIX code out into matching
disable_echo() and restore_echo() functions and lose the #ifdef in the
middle of the function, quite happily.

> Maybe if enough of these special cases accumulate, we could wind up
> with all of the Windows implementations/stubs in windows.c, and the
> UNIX/Linux versions in unix.c.  That could also capture the
> differences in the syslog and --background logic.
>
> David, what do you think?

Yeah, maybe. Then again, there's plenty of scope for reducing the amount
of ifdefs in the code already. Jason's patch also adds more than it
needs to — for example, the additional <wtypes.h> amd <wincon.h>
includes could be put in an #else clause for the existing #ifndef _WIN32
in the includes a few lines further up, and the new disable_echo() and
restore_echo() functions could possibly have lived inside an existing
conditional block too.

I'd still like to see a GUI version for Windows though; if you can
invoke the DLL from a scripting language surely that can't be
particularly hard to produce?

-- 
dwmw2
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