/*****************************************************************************\
 *  submit.c - submit a job with supplied contraints
 *  $Id$
 *****************************************************************************
 *  Copyright (C) 2002 The Regents of the University of California.
 *  Produced at Lawrence Livermore National Laboratory (cf, DISCLAIMER).
 *  Written by Morris Jette <jette1@llnl.gov>.
 *  UCRL-CODE-226842.
 *  
 *  This file is part of SLURM, a resource management program.
 *  For details, see <http://www.llnl.gov/linux/slurm/>.
 *  
 *  SLURM is free software; you can redistribute it and/or modify it under
 *  the terms of the GNU General Public License as published by the Free
 *  Software Foundation; either version 2 of the License, or (at your option)
 *  any later version.
 *
 *  In addition, as a special exception, the copyright holders give permission 
 *  to link the code of portions of this program with the OpenSSL library under 
 *  certain conditions as described in each individual source file, and 
 *  distribute linked combinations including the two. You must obey the GNU 
 *  General Public License in all respects for all of the code used other than 
 *  OpenSSL. If you modify file(s) with this exception, you may extend this 
 *  exception to your version of the file(s), but you are not obligated to do 
 *  so. If you do not wish to do so, delete this exception statement from your
 *  version.  If you delete this exception statement from all source files in 
 *  the program, then also delete it here.
 *  
 *  SLURM is distributed in the hope that it will be useful, but WITHOUT ANY
 *  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 *  FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 *  details.
 *  
 *  You should have received a copy of the GNU General Public License along
 *  with SLURM; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA.
\*****************************************************************************/

#ifdef HAVE_CONFIG_H
#  include "config.h"
#endif

#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>

#ifndef __USE_XOPEN_EXTENDED
extern pid_t getsid(pid_t pid);		/* missing from <unistd.h> */
#endif

#include <slurm/slurm.h>

#include "src/common/read_config.h"
#include "src/common/slurm_protocol_api.h"

/*
 * slurm_submit_batch_job - issue RPC to submit a job for later execution
 * NOTE: free the response using slurm_free_submit_response_response_msg
 * IN job_desc_msg - description of batch job request
 * OUT slurm_alloc_msg - response to request
 * RET 0 on success, otherwise return -1 and set errno to indicate the error
 */
int
slurm_submit_batch_job (job_desc_msg_t *req, 
		        submit_response_msg_t **resp )
{
        int rc;
        slurm_msg_t req_msg;
        slurm_msg_t resp_msg;
	bool host_set = false;
	char host[64];

	slurm_msg_t_init(&req_msg);
	slurm_msg_t_init(&resp_msg);


	/* 
	 * set Node and session id for this request
	 */
	if (req->alloc_sid == NO_VAL)
		req->alloc_sid = getsid(0);

	if ( (req->alloc_node == NULL)
	    && (gethostname_short(host, sizeof(host)) == 0) ) {
		req->alloc_node = host;
		host_set  = true;
	}

	req_msg.msg_type = REQUEST_SUBMIT_BATCH_JOB ;
	req_msg.data     = req; 

	rc = slurm_send_recv_controller_msg(&req_msg, &resp_msg);

	/*
	 *  Clear this hostname if set internally to this function
	 *    (memory is on the stack)
	 */
	if (host_set)
		req->alloc_node = NULL;

	if (rc == SLURM_SOCKET_ERROR)
		return SLURM_ERROR;

	switch (resp_msg.msg_type) {
	case RESPONSE_SLURM_RC:
		rc = ((return_code_msg_t *) resp_msg.data)->return_code;
		if (rc) 
			slurm_seterrno_ret(rc);
		*resp = NULL;
		break;
	case RESPONSE_SUBMIT_BATCH_JOB:
		*resp = (submit_response_msg_t *) resp_msg.data;
		break;
	default:
		slurm_seterrno_ret(SLURM_UNEXPECTED_MSG_ERROR);
	}

	return SLURM_PROTOCOL_SUCCESS;
}