Path: utzoo!attcan!uunet!mcvax!enea!kth!draken!nordmark
From: nordmark@nada.kth.se (Arne Nordmark)
Newsgroups: comp.sys.amiga.tech
Subject: Re: AmigaLine #D1, Disconnecting a program such that you can EndCLI
Summary: Example program
Message-ID: <655@draken.nada.kth.se>
Date: 23 Nov 88 10:57:34 GMT
References: <8811211839.AA12164@postgres.Berkeley.EDU>
Reply-To: stacken.kth.se!gno@uunet.uu.net (Gunnar Nordmark)
Organization: Royal Institute of Technology, Stockholm, Sweden
Lines: 109

In article <8811211839.AA12164@postgres.Berkeley.EDU> dillon@POSTGRES.BERKELEY.EDU (Matt Dillon) writes:
>Gunnar gno@stacken.kth.se Writes:
>>In my version of AmiCron I set pr_ConsoleTask to DeviceProc("null:")
>>and now it doesn't requires a window to run!
>
>	Try entering a crontab entry which does this:
>
>	"run list"
>
>	Does that work?  If so, you've just solve all my problems!

Well, I use ARP in my AmiCron and it barfs on the Run command.

But instead I wrote a test program called DevRun that I've included in this
posting. DevRun lets you run a command with any pr_ConsoleTask you like.

Your example "run list" works great with my null: device.
(I don't think I've solved *all* your problems though :-)

Execute (or is it Run?) seems to use the pr_ConsoleTask for all its IO
including the program it spawns. So if you say
	DevRun "Run List" null:
everyting, including Run's own output goes to neverland. (i.e. null:)

Here is the code. Tryit out on my null: device wich should arrive in
comp.sources.amiga soon.

Good luck!   -Gunnar

/***************************************************************************
 *
 *	devrun.c	Example program that runs a command from
 *			an alternative "console"
 *
 *	Lattice compile:
 *		lc -L DevRun
 *
 *	Manx compile:
 *		cc devrun
 *		ln -o DevRun devrun.o -lc
 *
 *
 *	Usage:  DevRun "commandline" [device]
 *
 *	examples:
 *			DevRun "Run List" null:
 *
 *		Runs the command "Run List" from my null: device
 *
 *			DevRun Date
 *
 *		Runs the command "Date" from the default console
 *		  (completely useless in other words)
 *
 *			DevRun "Date > Now" null:
 *
 *		Runs the command "Date" from my null: device
 *		  The output redirected to the file Now
 *
 *	Author:
 *		Gunnar Nordmark
 *		Nora strand 5
 *		S-182 34  DANDERYD
 *		SWEDEN
 *
 *		gno@stacken.kth.se	(stacken.kth.se!gno@uunet.uu.net)
 *	 	gno@SESTAK.BITNET
 *
 ***************************************************************************/

#include <exec/types.h>
#include <libraries/dosextens.h>
#include <stdio.h>

LONG Execute();
struct Task *FindTask();
struct MsgPort *DeviceProc();

main(argc, argv)
int argc;
char **argv;
{
	struct Process *proc=(struct Process *)FindTask(NULL);
	APTR old_device_proc=proc->pr_ConsoleTask; /* Save the old console */
	APTR new_device_proc;
	char *device;
	LONG ret;
 
	if (argc<2 || argc >3) {
		fprintf(stderr, "Usage:  DevRun \"commandline\" [device]\n");
		exit(RETURN_FAIL);
	}

	if (argc==3) {
		device=argv[2]; /* Get the device process */
		new_device_proc=(APTR)DeviceProc(device);
		if (new_device_proc==NULL) {
			fprintf(stderr, "There's no device-process for %s\n",
				device);
			exit(RETURN_FAIL);
		}
		proc->pr_ConsoleTask=new_device_proc;
	}
	fclose(stderr); /* Get rid of the stderr Open ("*",...) stuff */
	ret=Execute(argv[1], NULL, NULL);
	proc->pr_ConsoleTask=old_device_proc; /* Restore the old console */

	return ret;
}