/**
 * This is for backgrounding operations in SICS. They run in an own 
 * task. 
 * 
 * copyright: see file COPYRIGHT
 * 
 * Mark Koennecke, February 2009
 */
#include <sics.h>
#include "splitter.h"
#include "background.h"

/*---------------------------------------------------------------------------*/
typedef struct {
	SConnection *con;
	char *command;
} BckTask, *pBckTask;
/*---------------------------------------------------------------------------*/
static void KillBckTask(void *data){
	pBckTask self = (pBckTask)data;
	if(self == NULL){
		return;
	}
	if(self->con){
		SCDeleteConnection(self->con);
	}
	if(self->command){
		free(self->command);
	}
}
/*---------------------------------------------------------------------------*/
static int BackgroundTask(void *data){
	pBckTask self = (pBckTask)data;
	
	assert(self != NULL);
	
	InterpExecute(pServ->pSics,self->con,self->command);
	return 0;
}
/*----------------------------------------------------------------------------*/
int BackgroundCommand(SConnection *pCon, char *command){
	pBckTask self = NULL;
	
	self = calloc(1,sizeof(BckTask));
	if(self == NULL){
		return 0;
	}
	
	self->con = SCCopyConnection(pCon);
	self->command = strdup(command);
	if(self->con == NULL || self->command == NULL){
		free(self);
		return 0;
	}
	
	TaskRegister(pServ->pTasker, 
				BackgroundTask,
				NULL,
				KillBckTask,
				self,
				1);
	return 1;
}
/*------------------------------------------------------------------------*/
int BackgroundAction(SConnection *pCon, SicsInterp *pSics, 
                          void *pData, int argc, char *argv[]){
	int status;
	char command[1024];

	memset(command,0,1024);
	Arg2Text(argc-1,&argv[1], command, 1024);
	status = BackgroundCommand(pCon,command);
	if(status == 0){
		SCWrite(pCon,"ERROR: out of memory starting task", eError);
		return 0;
	}
	SCSendOK(pCon);
	return 1;
}
/*--------------------------------------------------------------------------*/
void InstallBackground(SicsInterp *pSics){
	AddCommand(pSics,
			"bg",
			BackgroundAction,
			NULL,
			NULL);
}