Post by: Jack2000 on 6 October 2005, 13:41
(http://illhostit.com/thumbnails/6466914342903058/Command.com.jpg) illhostit.com - Command.com.jpg (http://illhostit.com/files/6466914342903058/Command.com.jpg)
this is :
\edit.com command.com
just take a look ....
Post by: Refalm on 6 October 2005, 14:54
And open the HTML file :)
Post by: Kintaro on 6 October 2005, 16:19
Post by: Jack2000 on 6 October 2005, 16:56
/dev/con
yeah and then they say they do not steal
Post by: Kintaro on 6 October 2005, 20:33
Post by: Aloone_Jonez on 6 October 2005, 21:04
Post by: Jack2000 on 6 October 2005, 21:16
why whould it have /dev/con string!
the other two are with :\ and \ indicating that it should load them
from the def driver where command.com is located
even the slashes on it are the other direction !!!!!
can't you see the connection it is just some trash part left
from an Unix based sys !!!
Post by: WMD on 6 October 2005, 21:24
/dev/con
/dev/nul
/dev/clock$
/dev/lpt1
/dev/prn
/dev/com1
Those I can remember off-hand. It's no mystery that DOS is a poorly-conceived, single user Unix clone.
Post by: noob on 6 October 2005, 21:25
Post by: hm_murdock on 7 October 2005, 09:44
I've heard stories that the original author built it in one afternoon while dropping acid. I wonder about the validity of the one afternoon bit, but some amount of LSD would be required to make DOS.
Post by: Kintaro on 7 October 2005, 18:00
The /dev/ bit is probably what tells the system that it is a device, but opening a file with the typical API called "Con", "Aux", etc is basically opening a device. Dos has no /dev/ directory on the filename, no such thing as device nodes, just a crude API for input/serial/printer devices.
It is NOT unix. Also, CP/M had the same thing.
Post by: Aloone_Jonez on 7 October 2005, 19:40
Post by: Jenda on 8 October 2005, 22:51
Quote
Actually, it's a crudely constructed CP/M clone that was made for Apple IIs and old 8080 machines. Quick and Dirty Operating System. I think it was done by a guy at a software firm to see if he could. MS bought this hack and sold it as MS-DOS.
They just removed the "quick" part. :)
Post by: Kintaro on 9 October 2005, 14:03
Quote from: Aloone_Jonez
I know that but they did borrow some UNIX concepts like redirection and pipes which is possibly where the devices /CON /NUL came from.
I don't think pipes were in CP/M, just QDOS and MSDOS. However I am not sure, I know they were in MP/M. In fact when you read on MP/M you wonder why the hell it didn't blow MSDOS out of the water.
Post by: anphanax on 17 October 2005, 03:20
con\prn\nul\aux\com#\lpt# are just the tip of a much bigger iceberg :P.
For instance, although stupid, you can make your floppy drive light up by typing this in cmd.exe:
"more < \\.\GLOBALROOT\DEVICE\Floppy0"
If I recall correctly, those are all in some sort of kernel namespace (\..\?), and a lot of that junk isn't accessible in user-mode windows (in other words, I think some stuff, like the contents of the "Drivers" path, is only accessible in kernel-mode). Also, I believe there's a specialized undocumented API for working with kernel objects on NT. "NtQueryObject" from NTDLL.DLL comes to mind, for one.