Password reading through C/C++ in OpenVMS

[hem c reddy]

Hello,

Can anybody help me out how to read a password without echoing on the screen through C/C++ in OpenVMS?

Is there a substitute for temios.h or getpass()?

Thanks in advance,

Regards,
hem

[Sergejus Zabinskis]

Hi,
take a look at OpenVMS runtime library function: smg$read_string with option TRM$M_TM_NOECHO.

Cheers,
Sergejus

[Galen Tackett · Accepted solution]

Hem,

If all you want to do is to read without echoing, see my response to your other topic "Password reading in OpenVMS."

It's a lot simpler than using SMG$ (the screen management runtime library), though if you want to do fancier things like move the cursor around the screen, erase individual lines on the screen, etc., you'd want to check out SMG$ as Sergejus suggests.

Galen

[hem c reddy]

Hi Galen,

Thanks very much, it simply solved my problem.

Could you clarify this?

In that documentation I see "RNE" for read and no echo instead of "me". Can I use "PTA" too to clear the buffer along with "me"? If "me" is for "RNE" is there something similar for "PTA" too?

Is the following usuage correct? freopen("TT:","r",stdin,"rop=me,pta")

Thanks again,

Regards,
Reddy

[hem c reddy]

Just a couple of corrections ...

Mistakenly I read "rne" as "me". I regret for that and the usuage should read as
freopen("sys$input:","r",stdin,"rop=rne,pta");

Thanks,
Reddy

[Galen Tackett]

Hem,

I'm pleased to hear that my suggestion worked for you.

Although I haven't tried it, "rop=rne,pta" looks like it should clear the typeahead buffer as well as turning off echo.

Galen

[Craig A Berry]

I have a getpass() implementation for VMS wrapped around a readpassphrase() implementation available here:

http://cvs.sourceforge.net/viewcvs.py/freetds/freetds/vms/getpass.c?rev=1.5&view=log

http://cvs.sourceforge.net/viewcvs.py/freetds/freetds/include/replacements/readpassphrase.h?rev=1.1&view=log

[hem c reddy]

Hi All,

Thanks for your attention to the post.

Galen,

does your solution work for all type of terminals/consoles or it has any dependencies?

Regards,
Reddy

[Jan van den Ende]

hem,

from your Forum Profile:


I have assigned points to 0 of 19 responses to my questions.


Maybe you can find some time to do some assigning?

http://forums1.itrc.hp.com/service/forums/helptips.do?#33

Mind, I do NOT say you necessarily need to give lots of points. It is fully up to _YOU_ to decide how many. If you consider an answer is not deserving any points, you can also assign 0 ( = zero ) points, and then that answer will no longer be counted as unassigned.
Consider, that every poster took at least the trouble of posting for you!

To easily find your streams with unassigned points, click your own name somewhere.
This will bring up your profile.
Near the bottom of that page, under the caption â My Question(s)â you will find â questions or topics with unassigned points â Clicking that will give all, and only, your questions that still have unassigned postings.

Thanks on behalf of your Forum colleagues.

PS. â nothing personal in this. I try to post it to everyone with this kind of assignment ratio in this forum. If you have received a posting like this before â please do not take offence â none is intended!

Proost.

Have one on me.

jpe

[Galen Tackett]

Hem,

It should work for any VMS terminal device I can think of, probably including pseudo terminals (PTxx: devices) and the SYS$INPUT of batch and detached processes.

As I mentioned, though, it isn't portable to other operating systems. For portability, it would be better to hide it behind a jacket routine as Craig has done (see his previous response.)

I'm not certain that using SYS$QIOW would be quite as flexible as I don't know whether the function modifiers would be accepted by non-TT: type devices (e.g. batch input stream).

Happy New Year,

Galen