/*
 * startlots.c
 *
 * Build with libpq (eg, gcc startlots.c -o startlots -lpq).
 *
 * Usage: startlots N to start N backends.  Control-C to exit.
 */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "libpq-fe.h"

static void
exit_nicely(PGconn *conn)
{
	PQfinish(conn);
	exit(1);
}

static void
start1conn()
{
	char	   *pghost,
			   *pgport,
			   *pgoptions,
			   *pgtty;
	char	   *dbName;
	PGconn	   *conn;
	PGresult   *res;

	/*
	 * begin, by setting the parameters for a backend connection if the
	 * parameters are null, then the system will try to use reasonable
	 * defaults by looking up environment variables or, failing that,
	 * using hardwired constants
	 */
	pghost = NULL;				/* host name of the backend server */
	pgport = NULL;				/* port of the backend server */
	pgoptions = NULL;			/* special options to start up the backend
								 * server */
	pgtty = NULL;				/* debugging tty for the backend server */
	dbName = "template1";

	/* make a connection to the database */
	conn = PQsetdb(pghost, pgport, pgoptions, pgtty, dbName);

	/* check to see that the backend connection was successfully made */
	if (PQstatus(conn) == CONNECTION_BAD)
	{
		fprintf(stderr, "Connection to database '%s' failed.\n", dbName);
		fprintf(stderr, "%s", PQerrorMessage(conn));
		exit_nicely(conn);
	}

	/* run a transaction */
	res = PQexec(conn, "select version()");
	if (PQresultStatus(res) != PGRES_TUPLES_OK)
	{
		fprintf(stderr, "select version() command didn't return tuples properly\n");
		PQclear(res);
		exit_nicely(conn);
	}

	PQclear(res);

	/* leave the connection open */
}

int
main(int argc, char**argv)
{
	int		nconn = atoi(argv[1]);

	while (nconn-- > 0)
		start1conn();

	sleep(100000);

	return 0;
}