Pipe UNIX-commands

Pipe UNIX-commands

[Markus Wahl]

I'd like to know how I can make unix-commands from inside my ada-program.

Eg: The program shall pipe out the command 'ls' and then make something
within the program with the output of 'ls'. Am I clear?

Please reply booth to my e-mail adress and to this newsgroup.

Thanks in advance.

/Markus

"Ouvre le Chien." (Open the dogs) - David Bowie

Re: Pipe UNIX-commands

[Stephen & Tammy House]

Markus Wahl wrote:
> 
> I'd like to know how I can make unix-commands from inside my ada-program.
> 
> Eg: The program shall pipe out the command 'ls' and then make something
> within the program with the output of 'ls'. Am I clear?
> 
> Please reply booth to my e-mail adress and to this newsgroup.
> 
> Thanks in advance.
> 
> /Markus
> 
> "Ouvre le Chien." (Open the dogs) - David Bowie
Have you tried reading from Standard_In?  I think you just have to be
aware that and End_Error is temporary condition until the system can get
some more stuff buffered up.  I'm not sure, but I think we've got some
utilities at work that work that way.  Let me know if I'm wrong.  I'd
hate to be running around with that stuck in my head if its not right.

Re: Pipe UNIX-commands

[Larry Hazel]

Markus Wahl wrote:
> 
> I'd like to know how I can make unix-commands from inside my ada-program.
> 
> Eg: The program shall pipe out the command 'ls' and then make something
> within the program with the output of 'ls'. Am I clear?

I don't remember the details of the unix system call, I think it may be
'system' (try 'man system' to check it out).  I no longer have access to
unix.  Anyway, you can import this C function and run any command from
your Ada program that you can run from the shell prompt and can include
I/O redirection.  Something like:

with Interfaces.C;

   procedure Execute_Unix_Command (Command_Line :
Interfaces.C.Char_Array);
   pragma Import (C, Execute_Unix_Command, "system");

   ...

   Execute_Unix_Command (Interfaces.C.To_C ("ls > result_file"));

Now you can open result_file with Text_IO and read it.  There are
probably other ways.

Hope this helps

-- Larry Hazel => Larry.H.Hazel@cpmx.saic.com (205) 876-4509
-- I try to stay above C level,  I get C sick.
-- Team Ada & Team OS/2

Re: Pipe UNIX-commands

[Markus Wahl]

On Wed, 21 Aug 1996, Larry Hazel wrote:

> > I'd like to know how I can make unix-commands from inside my ada-program.

> > Eg: The program shall pipe out the command 'ls' and then make something
> > within the program with the output of 'ls'. Am I clear?

> I don't remember the details of the unix system call, I think it may be
> 'system' (try 'man system' to check it out).  I no longer have access to
> unix.  Anyway, you can import this C function and run any command from
> your Ada program that you can run from the shell prompt and can include
> I/O redirection.


Pitty I can't write C. Maybe someone else knows a solution suitable
for me. Thank you anyway.

/Markus

The government can take everything but your paranoia.

Pipe UNIX-commands

[Markus Wahl]

I'd like to know how I can make unix-commands from inside my ada-program.

Eg: The program shall pipe out the command 'ls' and then make something
within the program with the output of 'ls'. Am I clear?

Please reply booth to my e-mail adress and to this newsgroup.

Thanks in advance.

/Markus

"Ouvre le Chien." (Open the dogs) - David Bowie