Esempio n. 1
0
int main(int argc, char* argv[])
{
    int rc, idx;
    uint32_t addr, netmask, netaddr;
    struct sockaddr_in inaddr;
    char **aliases=NULL;

    if (0 > (rc = opal_init(&argc, &argv))) {
        fprintf(stderr, "orte_interface: couldn't init opal - error code %d\n", rc);
        return rc;
    }
    
    if (2 == argc) {
        rc = opal_iftupletoaddr(argv[1], &netaddr, &netmask);
    
        fprintf(stderr, "netaddr %03d.%03d.%03d.%03d netmask %03d.%03d.%03d.%03d rc %d\n",
                OPAL_IF_FORMAT_ADDR(netaddr), OPAL_IF_FORMAT_ADDR(netmask), rc);
    
        /* search for a matching interface - take the first one within the returned scope */
        idx = opal_ifbegin();
        while (0 < idx) {
            /* ignore the loopback interface */
            if (opal_ifisloopback(idx)) {
                fprintf(stderr, "LOOPBACK IGNORED\n");
                idx = opal_ifnext(idx);
                continue;
            }
            if (0 != (rc = opal_ifindextoaddr(idx, (struct sockaddr*)&inaddr, sizeof(inaddr)))) {
                break;
            }
            addr = ntohl(inaddr.sin_addr.s_addr);
            fprintf(stderr, "checking netaddr %03d.%03d.%03d.%03d addr %03d.%03d.%03d.%03d netmask %03d.%03d.%03d.%03d rc %d\n",
                    OPAL_IF_FORMAT_ADDR(netaddr), OPAL_IF_FORMAT_ADDR(addr), OPAL_IF_FORMAT_ADDR(netmask), rc);
            if (netaddr == (addr & netmask)) {
                fprintf(stderr, "MATCH FOUND\n");
            }
            idx = opal_ifnext(idx);
        }
    }

    /* check the aliases */
    opal_ifgetaliases(&aliases);
    idx = 0;
    while (NULL != aliases[idx]) {
        fprintf(stderr, "alias: %s\n", aliases[idx]);
        idx++;
    }

    opal_finalize();
    return 0;
}
Esempio n. 2
0
static int setup_channel(rmcast_base_channel_t *chan, uint8_t direction)
{
    int rc;
    int xmitsd, recvsd;
    
    if (0 <= chan->xmit && 0 <= chan->recv) {
        /* already setup */
        OPAL_OUTPUT_VERBOSE((2, orte_rmcast_base.rmcast_output,
                             "%s setup:channel %d already setup",
                             ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                             chan->channel));
        return ORTE_SUCCESS;
    }
    
    /* setup the IPv4 addr info */
    chan->addr.sin_family = AF_INET;
    chan->addr.sin_addr.s_addr = htonl(chan->network);
    chan->addr.sin_port = htons(chan->port);
    
    OPAL_OUTPUT_VERBOSE((2, orte_rmcast_base.rmcast_output,
                         "%s setup:channel addr %03d.%03d.%03d.%03d port %d for %s:%s",
                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                         OPAL_IF_FORMAT_ADDR(chan->network), (int)chan->port,
                         (ORTE_RMCAST_RECV & direction) ? " RECV" : " ",
                         (ORTE_RMCAST_XMIT & direction) ? " XMIT" : " "));
    
    if (0 > chan->xmit && (ORTE_RMCAST_XMIT & direction)) {
        /* create a xmit socket */
        if (ORTE_SUCCESS != (rc = setup_socket(&xmitsd, chan, false))) {
            ORTE_ERROR_LOG(rc);
            return rc;
        }
        chan->xmit = xmitsd;
    }
    
    if (0 > chan->recv && (ORTE_RMCAST_RECV & direction)) {
        /* create a recv socket */
        if (ORTE_SUCCESS != (rc = setup_socket(&recvsd, chan, true))) {
            ORTE_ERROR_LOG(rc);
            return rc;
        }
        chan->recv = recvsd;
        
        /* setup an event to catch messages */
        OPAL_OUTPUT_VERBOSE((2, orte_rmcast_base.rmcast_output,
                             "%s setup:channel activating recv event on fd %d",
                             ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),(int)chan->recv));
        
        opal_event_set(opal_event_base, &chan->recv_ev, chan->recv,
                       OPAL_EV_READ|OPAL_EV_PERSIST, recv_handler, chan);
        opal_event_add(&chan->recv_ev, 0);
    }

    return ORTE_SUCCESS;
}
Esempio n. 3
0
static int send_data(rmcast_base_send_t *snd, orte_rmcast_channel_t channel)
{
    char *bytes=NULL;
    int32_t sz;
    int rc;
    opal_buffer_t *buf=NULL;
    rmcast_base_channel_t *chan;
    rmcast_send_log_t *log, *lg;

    if (!comm_enabled) {
        return ORTE_ERR_COMM_DISABLED;
    }

    OPAL_OUTPUT_VERBOSE((2, orte_rmcast_base.rmcast_output,
                         "%s transmitting data for channel %d",
                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), channel));

    /* setup the message for xmission */
    if (ORTE_SUCCESS != (rc = orte_rmcast_base_queue_xmit(snd, channel, &buf, &chan))) {
        ORTE_ERROR_LOG(rc);
        goto CLEANUP;
    }
        
    /* store the working buf in the send ring buffer in case we
     * need to retransmit it later
     */
    log = OBJ_NEW(rmcast_send_log_t);
    log->channel = chan->channel;
    log->seq_num = chan->seq_num;
    opal_dss.copy_payload(log->buf, buf);
    if (NULL != (lg = (rmcast_send_log_t*)opal_ring_buffer_push(&chan->cache, log))) {
        /* release the old message */
        OPAL_OUTPUT_VERBOSE((5, orte_rmcast_base.rmcast_output,
                             "%s releasing message %d channel %d from log",
                             ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                             lg->seq_num, lg->channel));
        OBJ_RELEASE(lg);
    }

    /* unload the working buf to obtain the payload */
    if (ORTE_SUCCESS != (rc = opal_dss.unload(buf, (void**)&bytes, &sz))) {
        ORTE_ERROR_LOG(rc);
        goto CLEANUP;
    }
        
    OPAL_OUTPUT_VERBOSE((2, orte_rmcast_base.rmcast_output,
                         "%s rmcast:udp multicasting %d bytes to network %03d.%03d.%03d.%03d port %d tag %d",
                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), sz,
                         OPAL_IF_FORMAT_ADDR(chan->network), (int)chan->port, (int)snd->tag));
                
    if (sz != (rc = sendto(chan->xmit, bytes, sz, 0,
                           (struct sockaddr *)&(chan->addr), sizeof(struct sockaddr_in)))) {
        /* didn't get the message out */
        opal_output(0, "%s failed to send message to multicast network %03d.%03d.%03d.%03d on\n\terror %s(%d)",
                    ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), OPAL_IF_FORMAT_ADDR(chan->network),
                    strerror(errno), errno);
        rc = ORTE_ERR_COMM_FAILURE;
    } else {
        rc = ORTE_SUCCESS;
    }
        
    if (NULL != snd->buf) {
        /* call the cbfunc if required */
        if (NULL != snd->cbfunc_buffer) {
            snd->cbfunc_buffer(rc, chan->channel, chan->seq_num, snd->tag,
                               ORTE_PROC_MY_NAME, snd->buf, snd->cbdata);
        }
    } else {
        /* call the cbfunc if required */
        if (NULL != snd->cbfunc_iovec) {
            snd->cbfunc_iovec(rc, chan->channel, chan->seq_num, snd->tag, ORTE_PROC_MY_NAME,
                              snd->iovec_array, snd->iovec_count, snd->cbdata);
        }
    }

 CLEANUP:
    if (NULL != buf) {
        OBJ_RELEASE(buf);
    }
    if (NULL != bytes) {
        free(bytes);
    }
    return rc;    
}
Esempio n. 4
0
static int setup_socket(int *sd, rmcast_base_channel_t *chan, bool recvsocket)
{
    uint8_t ttl = 1;
    struct sockaddr_in inaddr;
    struct ip_mreq req;
    int addrlen;
    int target_sd;
    int flags;

    OPAL_OUTPUT_VERBOSE((2, orte_rmcast_base.rmcast_output,
                         "setup:socket addr %03d.%03d.%03d.%03d port %d",
                         OPAL_IF_FORMAT_ADDR(chan->network), (int)chan->port));
    
    target_sd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP);
    if(target_sd < 0) {
        if (EAFNOSUPPORT != opal_socket_errno) {
            opal_output(0,"rmcast:init: socket() failed: %s (%d)", 
                        strerror(opal_socket_errno), opal_socket_errno);
        }
        return ORTE_ERR_IN_ERRNO;
    }
    
    /* set the multicast flags */
    if ((setsockopt(target_sd, IPPROTO_IP, IP_MULTICAST_TTL, 
                    (void *)&ttl, sizeof(ttl))) < 0) {
        opal_output(0,"rmcast:init: socketopt() failed on MULTICAST_TTL: %s (%d)", 
                    strerror(opal_socket_errno), opal_socket_errno);
        return ORTE_ERR_IN_ERRNO;
    }
    
    /* enable port sharing */
    flags = 1;
    if (setsockopt (target_sd, SOL_SOCKET, SO_REUSEADDR, (const char *)&flags, sizeof(flags)) < 0) {
        opal_output(0, "rmcast:udp: unable to set the "
                    "SO_REUSEADDR option (%s:%d)\n",
                    strerror(opal_socket_errno), opal_socket_errno);
        CLOSE_THE_SOCKET(target_sd);
        return ORTE_ERROR;
    }

    /* if this is the recv side... */
    if (recvsocket) {
        memset(&inaddr, 0, sizeof(inaddr));
        inaddr.sin_family = AF_INET;
        inaddr.sin_addr.s_addr = htonl(chan->network);
        inaddr.sin_port = htons(chan->port);
        addrlen = sizeof(struct sockaddr_in);
        
        /* bind the socket */
        if (bind(target_sd, (struct sockaddr*)&inaddr, addrlen) < 0) {
            opal_output(0, "%s rmcast:init: bind() failed for addr %03d.%03d.%03d.%03d port %d\n\tError: %s (%d)",
                        ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), OPAL_IF_FORMAT_ADDR(chan->network), (int)chan->port,
                        strerror(opal_socket_errno), opal_socket_errno);
            CLOSE_THE_SOCKET(target_sd);
            return ORTE_ERROR;
        }
        /* set membership on the multicast interface */
        memset(&req, 0, sizeof (req));
        req.imr_multiaddr.s_addr = htonl(chan->network);
        req.imr_interface.s_addr = htonl(chan->interface);
        
        OPAL_OUTPUT_VERBOSE((2, orte_rmcast_base.rmcast_output,
                             "setup:socket:membership addr %03d.%03d.%03d.%03d interface %03d.%03d.%03d.%03d",
                             OPAL_IF_FORMAT_ADDR(chan->network), OPAL_IF_FORMAT_ADDR(chan->interface)));

        if ((setsockopt(target_sd, IPPROTO_IP, IP_ADD_MEMBERSHIP, 
                        (void *)&req, sizeof (req))) < 0) {
            opal_output(0, "%s rmcast:init: setsockopt() failed on ADD_MEMBERSHIP\n"
                        "\tfor multicast network %03d.%03d.%03d.%03d interface %03d.%03d.%03d.%03d\n\tError: %s (%d)",
                        ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                        OPAL_IF_FORMAT_ADDR(chan->network), OPAL_IF_FORMAT_ADDR(chan->interface),
                        strerror(opal_socket_errno), opal_socket_errno);
            CLOSE_THE_SOCKET(target_sd);
            return ORTE_ERROR;
        }
        /* set the recvbuf size */
        if ((setsockopt(target_sd, SOL_SOCKET, SO_RCVBUF,
                        &orte_rmcast_udp_rcvbuf_size, sizeof(orte_rmcast_udp_rcvbuf_size))) < 0) {
            opal_output(0, "%s rmcast:init: setsockopt() failed on SO_RCVBUF\n"
                        "\tfor multicast network %03d.%03d.%03d.%03d interface %03d.%03d.%03d.%03d\n\tError: %s (%d)",
                        ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                        OPAL_IF_FORMAT_ADDR(chan->network), OPAL_IF_FORMAT_ADDR(chan->interface),
                        strerror(opal_socket_errno), opal_socket_errno);
            CLOSE_THE_SOCKET(target_sd);
            return ORTE_ERROR;
        }
    } else {
        /* on the xmit side, need to set the interface */
        memset(&inaddr, 0, sizeof(inaddr));
        inaddr.sin_addr.s_addr = htonl(chan->interface);
        addrlen = sizeof(struct sockaddr_in);
        
        OPAL_OUTPUT_VERBOSE((2, orte_rmcast_base.rmcast_output,
                             "setup:socket:xmit interface %03d.%03d.%03d.%03d",
                             OPAL_IF_FORMAT_ADDR(chan->interface)));
        
        if ((setsockopt(target_sd, IPPROTO_IP, IP_MULTICAST_IF, 
                        (void *)&inaddr, addrlen)) < 0) {
            opal_output(0, "%s rmcast:init: setsockopt() failed on MULTICAST_IF\n"
                        "\tfor multicast network %03d.%03d.%03d.%03d interface %03d.%03d.%03d.%03d\n\tError: %s (%d)",
                        ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                        OPAL_IF_FORMAT_ADDR(chan->network), OPAL_IF_FORMAT_ADDR(chan->interface),
                        strerror(opal_socket_errno), opal_socket_errno);
            CLOSE_THE_SOCKET(target_sd);
            return ORTE_ERROR;
        }
        /* set the sendbuf size */
        if ((setsockopt(target_sd, SOL_SOCKET, SO_SNDBUF,
                        &orte_rmcast_udp_sndbuf_size, sizeof(orte_rmcast_udp_sndbuf_size))) < 0) {
            opal_output(0, "%s rmcast:init: setsockopt() failed on SO_SNDBUF\n"
                        "\tfor multicast network %03d.%03d.%03d.%03d interface %03d.%03d.%03d.%03d\n\tError: %s (%d)",
                        ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                        OPAL_IF_FORMAT_ADDR(chan->network), OPAL_IF_FORMAT_ADDR(chan->interface),
                        strerror(opal_socket_errno), opal_socket_errno);
            CLOSE_THE_SOCKET(target_sd);
            return ORTE_ERROR;
        }
    }
    
    /* set socket up to be non-blocking */
    if((flags = fcntl(target_sd, F_GETFL, 0)) < 0) {
        opal_output(0, "rmcast:init: fcntl(F_GETFL) failed: %s (%d)", 
                    strerror(opal_socket_errno), opal_socket_errno);
        return ORTE_ERROR;
    } else {
        flags |= O_NONBLOCK;
        if(fcntl(target_sd, F_SETFL, flags) < 0) {
            opal_output(0, "rmcast:init: fcntl(F_SETFL) failed: %s (%d)", 
                        strerror(opal_socket_errno), opal_socket_errno);
            return ORTE_ERROR;
        }
    }
    
    /* return the socket */
    *sd = target_sd;
    
    return ORTE_SUCCESS;
}
Esempio n. 5
0
static int open_channel(orte_rmcast_channel_t channel, char *name,
                        char *network, int port, char *interface, uint8_t direction)
{
    opal_list_item_t *item;
    rmcast_base_channel_t *nchan, *chan;
    uint32_t netaddr=0, netmask=0, intr=0;
    int rc;
    unsigned int i, n, start, end, range;
    bool port_assigned;
    
    OPAL_OUTPUT_VERBOSE((2, orte_rmcast_base.rmcast_output,
                         "%s opening channel %d for %s",
                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), channel, name));

    /* parse the network, if provided */
    if (NULL != network) {
        if (ORTE_SUCCESS != (rc = opal_iftupletoaddr(network, &netaddr, &netmask))) {
            orte_show_help("help-rmcast-base.txt", "invalid-net-mask", true, network, ORTE_ERROR_NAME(rc));
            return ORTE_ERR_SILENT;
        }        
    }
    
    /* parse the interface, if provided */
    if (NULL != interface) {
        if (ORTE_SUCCESS != (rc = opal_iftupletoaddr(interface, &intr, NULL))) {
            orte_show_help("help-rmcast-base.txt", "invalid-net-mask", true, interface, ORTE_ERROR_NAME(rc));
            return ORTE_ERR_SILENT;
        }        
    }
    
    /* see if this name has already been assigned a channel on the specified network */
    OPAL_OUTPUT_VERBOSE((7, orte_rmcast_base.rmcast_output,
                         "%s open_channel: searching for %s:%d",
                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), name, channel));
                        
    chan = NULL;
    ORTE_ACQUIRE_THREAD(&orte_rmcast_base.main_ctl);
    for (item = opal_list_get_first(&orte_rmcast_base.channels);
         item != opal_list_get_end(&orte_rmcast_base.channels);
         item = opal_list_get_next(item)) {
        nchan = (rmcast_base_channel_t*)item;
        
        OPAL_OUTPUT_VERBOSE((7, orte_rmcast_base.rmcast_output,
                             "%s open_channel: channel %s:%d",
                             ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                             nchan->name, channel));

        if (nchan->channel == channel ||
            0 == strcasecmp(nchan->name, name)) {
             chan = nchan;
            break;
        }
    }
    
    if (NULL != chan) {
        /* already exists - check that the requested
         * sockets are setup
         */
        OPAL_OUTPUT_VERBOSE((2, orte_rmcast_base.rmcast_output,
                             "%s rmcast:udp using existing channel %s:%d network %03d.%03d.%03d.%03d port %d",
                             ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                             chan->name, chan->channel,
                             OPAL_IF_FORMAT_ADDR(chan->network),
                             (int)chan->port));
        
        if (ORTE_SUCCESS != (rc = setup_channel(chan, direction))) {
            ORTE_ERROR_LOG(rc);
            ORTE_RELEASE_THREAD(&orte_rmcast_base.main_ctl);
            return rc;
        }
        ORTE_RELEASE_THREAD(&orte_rmcast_base.main_ctl);
        return ORTE_SUCCESS;
    }
    
    /* we didn't find an existing match, so create a new channel */
    OPAL_OUTPUT_VERBOSE((2, orte_rmcast_base.rmcast_output,
                         "%s creating new channel %s for %s",
                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                         orte_rmcast_base_print_channel(channel), name));

    chan = OBJ_NEW(rmcast_base_channel_t);
    chan->name = strdup(name);
    chan->channel = channel;
    /* if we were not given a network, use the default */
    if (NULL == network) {
        chan->network = orte_rmcast_base.xmit_network;
    } else {
        chan->network = netaddr;
    }
    /* if we were not given an interface, use the default */
    if (NULL == interface) {
        chan->interface = orte_rmcast_base.interface;
    } else {
        chan->interface = intr;
    }
    /* if we were not given a port, use a default one */
    if (port < 0) {
        /* cycle thru the port ranges until we find the
         * port corresponding to this channel number
         */
        n=0;
        port_assigned = false;
        for (i=0; NULL != orte_rmcast_base.ports.start[i]; i++) {
            /* how many ports are in this range? */
            start = strtol(orte_rmcast_base.ports.start[i], NULL, 10);
            end = strtol(orte_rmcast_base.ports.end[i], NULL, 10);
            range = end - start + 1;
            if (chan->channel < (n + range)) {
                /* take the corresponding port */
                chan->port = start + (chan->channel - n);
                port_assigned = true;
                break;
            }
            n += range;
        }
        if (!port_assigned) {
            opal_output(0, "%s CANNOT ASSIGN PORT TO CHANNEL %s",
                        ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                        orte_rmcast_base_print_channel(chan->channel));
            return ORTE_ERROR;
        }
    } else {
        chan->port = port;
    }
    opal_list_append(&orte_rmcast_base.channels, &chan->item);
    ORTE_RELEASE_THREAD(&orte_rmcast_base.main_ctl);
    
    /* if this is my input, set that value */
    if (ORTE_RMCAST_MY_INPUT & direction) {
        orte_rmcast_base.my_input_channel = chan;
    }

    /* if this is my output, set that value */
    if (ORTE_RMCAST_MY_OUTPUT & direction) {
        orte_rmcast_base.my_output_channel = chan;
    }

    OPAL_OUTPUT_VERBOSE((2, orte_rmcast_base.rmcast_output,
                         "%s rmcast:udp opening new channel %s:%s network %03d.%03d.%03d.%03d port %d for%s%s",
                         ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
                         chan->name, orte_rmcast_base_print_channel(chan->channel),
                         OPAL_IF_FORMAT_ADDR(chan->network),
                         (int)chan->port,
                         (ORTE_RMCAST_RECV & direction) ? " RECV" : " ",
                         (ORTE_RMCAST_XMIT & direction) ? " XMIT" : " "));

    if (ORTE_SUCCESS != (rc = setup_channel(chan, direction))) {
        ORTE_ERROR_LOG(rc);
        return rc;
    }
    
    return ORTE_SUCCESS;
}
Esempio n. 6
0
int main(int argc, char* argv[])
{
    int rc, idx;
    uint32_t addr, netmask, netaddr;
    struct sockaddr_in inaddr, *paddr;
    char **aliases=NULL;
    opal_if_t *intf;

    if (0 > (rc = opal_init(&argc, &argv))) {
        fprintf(stderr, "opal_interface: couldn't init opal - error code %d\n", rc);
        return rc;
    }

    if (OPAL_SUCCESS != mca_base_framework_open(&opal_if_base_framework, 0)) {
        fprintf(stderr, "opal_interface: couldn't get interfaces\n");
        return 1;
    }

    for (intf =  (opal_if_t*)opal_list_get_first(&opal_if_list);
            intf != (opal_if_t*)opal_list_get_end(&opal_if_list);
            intf =  (opal_if_t*)opal_list_get_next(intf)) {
        paddr = (struct sockaddr_in*) &intf->if_addr;
        fprintf(stderr, "intf: %s AF: %s indx: %d kindx: %d\n", intf->if_name,
                (AF_INET == paddr->sin_family) ? "v4" : "v6",
                intf->if_index, intf->if_kernel_index);
    }

    if (2 == argc) {
        rc = opal_iftupletoaddr(argv[1], &netaddr, &netmask);

        fprintf(stderr, "netaddr %03d.%03d.%03d.%03d netmask %03d.%03d.%03d.%03d rc %d\n",
                OPAL_IF_FORMAT_ADDR(netaddr), OPAL_IF_FORMAT_ADDR(netmask), rc);

        /* search for a matching interface - take the first one within the returned scope */
        idx = opal_ifbegin();
        while (0 < idx) {
            /* ignore the loopback interface */
            if (opal_ifisloopback(idx)) {
                fprintf(stderr, "LOOPBACK IGNORED\n");
                idx = opal_ifnext(idx);
                continue;
            }
            if (0 != (rc = opal_ifindextoaddr(idx, (struct sockaddr*)&inaddr, sizeof(inaddr)))) {
                break;
            }
            addr = ntohl(inaddr.sin_addr.s_addr);
            fprintf(stderr, "checking netaddr %03d.%03d.%03d.%03d addr %03d.%03d.%03d.%03d netmask %03d.%03d.%03d.%03d rc %d\n",
                    OPAL_IF_FORMAT_ADDR(netaddr), OPAL_IF_FORMAT_ADDR(addr), OPAL_IF_FORMAT_ADDR(netmask), rc);
            if (netaddr == (addr & netmask)) {
                fprintf(stderr, "MATCH FOUND\n");
            }
            idx = opal_ifnext(idx);
        }
    }

    /* check the aliases */
    opal_ifgetaliases(&aliases);
    idx = 0;
    while (NULL != aliases[idx]) {
        fprintf(stderr, "alias: %s\n", aliases[idx]);
        idx++;
    }

    opal_finalize();
    return 0;
}