/*****************************************************************************\
 *  testpmi2.c - reservation creation function for scontrol.
 *****************************************************************************
 *  Copyright (C) 2014 SchedMD LLC
 *  Written by David Bigagli <david@schedmd.com>
 *
 *  This file is part of Slurm, a resource management program.
 *  For details, see <https://slurm.schedmd.com/>.
 *  Please also read the included file: DISCLAIMER.
 *
 *  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.
\*****************************************************************************/
#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <string.h>
#include <slurm/pmi2.h>
#include <sys/time.h>

static char *mrand(int, int);

int
main(int argc, char **argv)
{
	int rank;
	int size;
	int appnum;
	int spawned;
	int flag;
	int len;
	int i;
	struct timeval tv;
	struct timeval tv2;
	char jobid[128];
	char key[128];
	char val[128];
	char buf[128];

	{
		int x = 1;
		while (x == 0) {
			sleep(2);
		}
	}

	gettimeofday(&tv, NULL);
	srand(tv.tv_sec);

	PMI2_Init(&spawned, &size, &rank, &appnum);

	PMI2_Job_GetId(jobid, sizeof(jobid));

	memset(val, 0, sizeof(val));
	PMI2_Info_GetJobAttr("mpi_reserved_ports",
			     val,
			     PMI2_MAX_ATTRVALUE,
			     &flag);

	sprintf(key, "mpi_reserved_ports");
	PMI2_KVS_Put(key, val);

	memset(val, 0, sizeof(val));
	sprintf(buf, "PMI_netinfo_of_task");
	PMI2_Info_GetJobAttr(buf,
			     val,
			     PMI2_MAX_ATTRVALUE,
			     &flag);
	sprintf(key, buf);
	PMI2_KVS_Put(key, val);

	memset(val, 0, sizeof(val));
	sprintf(key, "david@%d", rank);
	sprintf(val, "%s", mrand(97, 122));
	PMI2_KVS_Put(key, val);

	PMI2_KVS_Fence();

	for (i = 0; i < size; i++) {

		memset(val, 0, sizeof(val));
		sprintf(key, "PMI_netinfo_of_task");
		PMI2_KVS_Get(jobid,
			     PMI2_ID_NULL,
			     key,
			     val,
			     sizeof(val),
			     &len);
		printf("rank: %d key:%s val:%s\n", rank, key, val);

		memset(val, 0, sizeof(val));
		sprintf(key, "david@%d", rank);
		PMI2_KVS_Get(jobid,
			     PMI2_ID_NULL,
			     key,
			     val,
			     sizeof(val),
			     &len);
		printf("rank: %d key:%s val:%s\n", rank, key, val);

		memset(val, 0, sizeof(val));
		sprintf(key, "mpi_reserved_ports");
		PMI2_KVS_Get(jobid,
			     PMI2_ID_NULL,
			     key,
			     val,
			     sizeof(val),
			     &len);
		printf("rank: %d key:%s val:%s\n", rank, key, val);
	}

	PMI2_Finalize();

	gettimeofday(&tv2, NULL);
	printf("%f\n",
	       ((tv2.tv_sec - tv.tv_sec) * 1000.0
		+ (tv2.tv_usec - tv.tv_usec) / 1000.0));

	return 0;
}

/* Generate a random number between
 * min and Max and convert it to
 * a string.
 */
static char *
mrand(int m, int M)
{
    int i;
    time_t t;
    static char buf[64];

    memset(buf, 0, sizeof(buf));
    for (i = 0; i  < 16; i++)
        buf[i] = rand() % (M - m + 1) + m;

    return buf;
}