How can we execute a system command from D
and grab the output ?

I guess executing it on a separate thread should be trivial,
(if not can you throw that in also? :)

(I've seen:

  extern(C) int system(char*);
  int main()
  {
      system("some_program");
      return 0;
  }

  // system is <stdlib.h>
  // exec.. is <unistd.h> is it preferred on unix?
)

Thanks

Ant

You can use popen and the like to implement a cross-platform solution .  Id like a copy when your done ;).

C


"Ant" <Ant_member@pathlink.com> wrote in message news:bm7ts9$2i75$1@digitaldaemon.com...
> How can we execute a system command from D
> and grab the output ?
>
> I guess executing it on a separate thread should be trivial,
> (if not can you throw that in also? :)
>
> (I've seen:
>
>   extern(C) int system(char*);
>   int main()
>   {
>       system("some_program");
>       return 0;
>   }
>
>   // system is <stdlib.h>
>   // exec.. is <unistd.h> is it preferred on unix?
> )
>
> Thanks
>
> Ant
>
>

In article <bm9k5k$1qc8$1@digitaldaemon.com>, Charles Sanders says...
>
>You can use popen and the like to implement a cross-platform solution .  Id like a copy when your done ;).
>
>C

man popen
"The  popen() function opens a process by creating a pipe, forking, and invoking
the shell."

Thanks

Ant

In article <bm9k5k$1qc8$1@digitaldaemon.com>, Charles Sanders says...
>
>You can use popen and the like to implement a cross-platform solution .  Id like a copy when your done ;).
>
>C

see attachment.

How do you like it? Please send back improvements or suggestions. For now this is good enought for me as I can run 'make' from leds and capture the output into a text widget :)

(maybe it's just another
"pointless wrappers around C runtime library functions or OS API functions"
but i prefer to do it like this.)

It's not ideal as we might want stderr also.
(in linux/bash append " 2>&1" to the command to send stderr into stdout)
Probably it's possible to grab stdin/out/err of a process that's
already started but I've not idea here to look)


Ant

Cool ill check it out when i get home :D.

C

"Ant" <Ant_member@pathlink.com> wrote in message news:bmf302$2vfc$1@digitaldaemon.com...
> In article <bm9k5k$1qc8$1@digitaldaemon.com>, Charles Sanders says...
> >
> >You can use popen and the like to implement a cross-platform solution .
Id
> >like a copy when your done ;).
> >
> >C
>
> see attachment.
>
> How do you like it? Please send back improvements or suggestions. For now this is good enought for me as I can run 'make' from leds and capture the output into a text widget :)
>
> (maybe it's just another
> "pointless wrappers around C runtime library functions or OS API
functions"
> but i prefer to do it like this.)
>
> It's not ideal as we might want stderr also.
> (in linux/bash append " 2>&1" to the command to send stderr into stdout)
> Probably it's possible to grab stdin/out/err of a process that's
> already started but I've not idea here to look)
>
>
> Ant
>
>
>

In article <bmf5tk$22q$1@digitaldaemon.com>, Charles Sanders says...
>
>Cool ill check it out when i get home :D.
>
>C

opps... probably,after the cycle on read(), we need:

// not tested
if ( line.length > 0 )
{
	foreach(POpenLineListener listener; lineListeners)
	{
		listener.popenLineCallback(line.dup);
	}
}

but I guess this will never get us the last line if it's empty...

Ant

In article <bmf5tk$22q$1@digitaldaemon.com>, Charles Sanders says...

>You can use popen and the like to implement a cross-platform solution .

So, will it run on Windows just how it is?

(I added a notification of "job end" to the interfaces.)

Ant