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Index > Linux > How can I get char by char input with libc?

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Tyler



Joined: 19 Nov 2009
Posts: 1216
Location: NC, USA
Tyler
I don't want to use getchar because I want the function to accept one char and immediately return.
This is as far as I've got
Code:
 ..invalid_mode:
         push   [_stdin]
         call   [fgetc]
         add    esp,sizeof_pntr
         push   [_stdout]
         push   eax
         call   [fputc]
         pop    eax
         add    esp,sizeof_pntr
         cmp    al,-1 ; Anything other than -1 here causes an infinite loop
         jne    ..invalid_mode  
    

but it closes without waiting for input. It would also be useful to have a function that will accept the enter key and return 0xD or 0xA, is there one that does that?
Post 07 Apr 2010, 03:47
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia
vid
use read() or fread()
Post 07 Apr 2010, 09:17
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Tyler



Joined: 19 Nov 2009
Posts: 1216
Location: NC, USA
Tyler
Is there a way to do it in Fasmlib? Example?
Post 08 Apr 2010, 03:52
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia
vid
Hmm... I think I had stdin.read.byte or stdin.read.char (which was just a wrapper for generic stream.read.byte called with stream=stdin, which was wrapper for stream.read called with size=1).

Unfortunatelly I don't have copy of FASMLIB on this machine, so you won't get your example. But it should be easy enough to do yourself, in either libc or FASMLIB (note that I don't plan to do any further development on FASMLIB, so I don't really encourage people to use it anymore).
Post 08 Apr 2010, 18:21
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Tyler



Joined: 19 Nov 2009
Posts: 1216
Location: NC, USA
Tyler
vid wrote:

note that I don't plan to do any further development on FASMLIB

Sad to here that, from what I've read, it had potential to be really useful. I should warn you, as of ~1am last night, your wikipedia page on it was a day away from being deleted.
Post 08 Apr 2010, 21:21
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vid
Verbosity in development


Joined: 05 Sep 2003
Posts: 7105
Location: Slovakia
vid
Quote:
Sad to here that, from what I've read, it had potential to be really useful.

It solved some problems with using libc in assembly (also some general problems of libc), but IMO it wasn't that much. It was just somewhat more convenient than libc.

Quote:
I should warn you, as of ~1am last night, your wikipedia page on it was a day away from being deleted.

Not that I would give a damn, but I wonder why? Not enough relevance?
Post 09 Apr 2010, 08:37
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17340
Location: In your JS exploiting you and your system
revolution
vid wrote:
Not that I would give a damn, but I wonder why? Not enough relevance?
Well it seems to have been saved for now. But, vid, you gave NO references at all. From what I have seen at WP, without references people get nervous about it and are keen to delete.
Post 09 Apr 2010, 10:37
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Tyler



Joined: 19 Nov 2009
Posts: 1216
Location: NC, USA
Tyler
It said it was being deleted for a conflict of interest, claiming that vid wrote it all. You could give a link to your flatassembler.net hosted site as a reference.
Post 09 Apr 2010, 19:22
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revolution
When all else fails, read the source


Joined: 24 Aug 2004
Posts: 17340
Location: In your JS exploiting you and your system
revolution
Tyler wrote:
It said it was being deleted for a conflict of interest, claiming that vid wrote it all. You could give a link to your flatassembler.net hosted site as a reference.
A link like that would just prove the conflict of interest. But anyhow it doesn't now matter since the storm has passed.
Post 09 Apr 2010, 22:52
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Tyler



Joined: 19 Nov 2009
Posts: 1216
Location: NC, USA
Tyler
Post 15 May 2010, 11:12
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