aboutsummaryrefslogtreecommitdiffstats
path: root/test/scripts/socket_test.sh
blob: ca33eeefe038d8e8fba2c68b17e08deb0e24217c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
#! /bin/bash
#
# socket_test.sh -- script to run socket tests.
#
script_dir="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
vpp_dir="$WS_ROOT/build-root/install-vpp-native/vpp/bin/"
vpp_debug_dir="$WS_ROOT/build-root/install-vpp_debug-native/vpp/bin/"
vpp_shm_dir="/dev/shm/"
vpp_run_dir="/run/vpp"
lib64_dir="$WS_ROOT/build-root/install-vpp-native/vpp/lib64/"
lib64_debug_dir="$WS_ROOT/build-root/install-vpp_debug-native/vpp/lib64/"
dpdk_devbind="/usr/share/dpdk/usertools/dpdk-devbind.py"
docker_vpp_dir="/vpp/"
docker_app_dir="/vpp/"
docker_lib64_dir="/vpp-lib64/"
docker_os="ubuntu"
vcl_ldpreload_lib="libvcl_ldpreload.so.0.0.0"
user_gid="$(id -g)"
vpp_app="vpp"
sock_srvr_app="sock_test_server"
sock_clnt_app="sock_test_client"
sock_srvr_addr="127.0.0.1"
sock_srvr_port="22000"
iperf_srvr_app="iperf3 -V4d -s"
iperf_clnt_app="iperf3 -V4d -c \$srvr_addr"
gdb_in_emacs="gdb_in_emacs"
vcl_config="vcl.conf"
vcl_config_dir="$WS_ROOT/src/vcl/"
docker_vcl_config_dir="/etc/vpp/"
xterm_geom="100x60"
bash_header="#! /bin/bash"
tmp_cmdfile_prefix="/tmp/socket_test_cmd"
cmd1_file="${tmp_cmdfile_prefix}1.$$"
cmd2_file="${tmp_cmdfile_prefix}2.$$"
cmd3_file="${tmp_cmdfile_prefix}3.$$"
vpp_eth_name="enp0s8"
tmp_vpp_exec_file="/tmp/vpp_config.$$"
tmp_gdb_cmdfile_prefix="/tmp/gdb_cmdfile"
def_gdb_cmdfile_prefix="$WS_ROOT/extras/gdb/gdb_cmdfile"
tmp_gdb_cmdfile_vpp="${tmp_gdb_cmdfile_prefix}_vpp.$$"
tmp_gdb_cmdfile_client="${tmp_gdb_cmdfile_prefix}_vcl_client.$$"
tmp_gdb_cmdfile_server="${tmp_gdb_cmdfile_prefix}_vcl_server.$$"
get_docker_server_ip4addr='srvr_addr=$(docker network inspect bridge | grep IPv4Address | awk -e '\''{print $2}'\'' | sed -e '\''s,/16,,'\'' -e '\''s,",,g'\'' -e '\''s/,//'\'')'
#' single quote to fix the confused emacs colorizer.
trap_signals="SIGINT SIGTERM EXIT"

# Set default values for imported environment variables if they don't exist.
#
VPP_GDB_CMDFILE="${VPP_GDB_CMDFILE:-${def_gdb_cmdfile_prefix}.vpp}"
VPPCOM_CLIENT_GDB_CMDFILE="${VPPCOM_CLIENT_GDB_CMDFILE:-${def_gdb_cmdfile_prefix}.vppcom_client}"
VPPCOM_SERVER_GDB_CMDFILE="${VPPCOM_SERVER_GDB_CMDFILE:-${def_gdb_cmdfile_prefix}.vppcom_server}"

usage() {
    cat <<EOF
Usage: socket_test.sh OPTIONS TEST
TESTS:
  nk, native-kernel   Run server & client on host using kernel.
  nv, native-vcl      Run vpp, server & client on host using VppComLib.
  np, native-preload  Run vpp, server & client on host using LD_PRELOAD.
  dk, docker-kernel   Run server & client in docker using kernel stack.
  dv, docker-vcl      Run vpp on host, server & client in docker using VppComLib.
  dp, docker-preload  Run vpp on host, server & client in docker using LD_PRELOAD.

OPTIONS:
  -h                  Print this usage text.
  -l                  Leave ${tmp_cmdfile_prefix}* files after test run.
  -b                  Run bash after application exit.
  -d                  Run the vpp_debug version of all apps.
  -c                  Set VCL_CONFIG to use the vcl_test.conf file.
  -i                  Run iperf3 for client/server app in native tests.
  -n                  Name of ethernet for VPP to use in multi-host cfg.
  -6                  Use ipv6 addressing.
  -f                  Full thru host stack vpp configuration. 
  -m c[lient]         Run client in multi-host cfg (server on remote host)
     s[erver]         Run server in multi-host cfg (client on remote host)
  -e a[ll]            Run all in emacs+gdb.
     c[lient]         Run client in emacs+gdb.
     s[erver]         Run server in emacs+gdb.
     v[pp]            Run vpp in emacs+gdb.
  -g a[ll]            Run all in gdb.
     c[lient]         Run client in gdb.
     s[erver]         Run server in gdb.
     v[pp]            Run vpp in gdb.
  -t                  Use tabs in one xterm if available (e.g. xfce4-terminal).

OPTIONS passed to client/server:
  -S <ip address>     Server IP address.
  -P <server port>    Server Port number.
  -E <data>           Run Echo test.
  -N <num-writes>     Test Cfg: number of writes.
  -R <rxbuf-size>     Test Cfg: rx buffer size.
  -T <txbuf-size>     Test Cfg: tx buffer size.
  -U                  Run Uni-directional test.
  -B                  Run Bi-directional test.
  -I <num-tst-socks>  Send data over multiple test sockets in parallel.
  -V                  Test Cfg: Verbose mode.
  -X                  Exit client/server after running test.

Environment variables:
  VCL_CONFIG                Pathname of vppcom configuration file.
  VPP_GDB_CMDFILE            Pathname of gdb command file for vpp.
  VPPCOM_CLIENT_GDB_CMDFILE  Pathname of gdb command file for client.
  VPPCOM_SERVER_GDB_CMDFILE  Pathname of gdb command file for server.
EOF
    exit 1
}

declare -i emacs_vpp=0
declare -i emacs_client=0
declare -i emacs_server=0
declare -i gdb_vpp=0
declare -i gdb_client=0
declare -i gdb_server=0
declare -i perf_vpp=0
declare -i perf_client=0
declare -i perf_server=0
declare -i leave_tmp_files=0
declare -i bash_after_exit=0
declare -i iperf3=0
declare -i use_ipv6=0

while getopts ":hitlbcd6fn:m:e:g:p:E:I:N:P:R:S:T:UBVX" opt; do
    case $opt in
        h) usage ;;
        l) leave_tmp_files=1
           ;;
        b) bash_after_exit=1
           ;;
        i) iperf3=1
           ;;
        6) use_ipv6=1
           ;;
        f) full_thru_host_stack_vpp_cfg=1
           ;;
        t) xterm_geom="180x40"
           use_tabs="true"
           ;;
        c) VCL_CONFIG="${vcl_config_dir}vcl_test.conf"
           ;;
        d) title_dbg="-DEBUG"
           vpp_dir=$vpp_debug_dir
           lib64_dir=$lib64_debug_dir
           ;;
        e) if [ $OPTARG = "a" ] || [ $OPTARG = "all" ] ; then
               emacs_client=1
               emacs_server=1
               emacs_vpp=1
           elif [ $OPTARG = "c" ] || [ $OPTARG = "client" ] ; then
               emacs_client=1
           elif [ $OPTARG = "s" ] || [ $OPTARG = "server" ] ; then
               emacs_server=1
           elif [ $OPTARG = "v" ] || [ $OPTARG = "vpp" ] ; then
               emacs_vpp=1
           else
               echo "ERROR: Option -e unknown argument \'$OPTARG\'" >&2
               usage
           fi
           title_dbg="-DEBUG"
           vpp_dir=$vpp_debug_dir
           lib64_dir=$lib64_debug_dir
           ;;
        n) vpp_eth_name="$OPTARG"
           ;;
        m) if [ $OPTARG = "c" ] || [ $OPTARG = "client" ] ; then
               multi_host="client"
           elif [ $OPTARG = "s" ] || [ $OPTARG = "server" ] ; then
               multi_host="server"
           else
               echo "ERROR: Option -e unknown argument \'$OPTARG\'" >&2
               usage
           fi
           ;;
        g) if [ $OPTARG = "a" ] || [ $OPTARG = "all" ] ; then
               gdb_client=1
               gdb_server=1
               gdb_vpp=1
           elif [ $OPTARG = "c" ] || [ $OPTARG = "client" ] ; then
               gdb_client=1
           elif [ $OPTARG = "s" ] || [ $OPTARG = "server" ] ; then
               gdb_server=1
           elif [ $OPTARG = "v" ] || [ $OPTARG = "vpp" ] ; then
               gdb_vpp=1
           else
               echo "ERROR: Option -g unknown argument \'$OPTARG\'" >&2
               usage
           fi
           ;;
        p) if [ $OPTARG = "a" ] || [ $OPTARG = "all" ] ; then
               perf_client=1
               perf_server=1
               perf_vpp=1
           elif [ $OPTARG = "c" ] || [ $OPTARG = "client" ] ; then
               perf_client=1
           elif [ $OPTARG = "s" ] || [ $OPTARG = "server" ] ; then
               perf_server=1
           elif [ $OPTARG = "v" ] || [ $OPTARG = "vpp" ] ; then
               perf_vpp=1
           else
               echo "ERROR: Option -p unknown argument \'$OPTARG\'" >&2
               usage
           fi
           echo "WARNING: -p options TBD"
           ;;
        S) sock_srvr_addr="$OPTARG"
           ;;
        P) sock_srvr_port="$OPTARG"
           ;;
E|I|N|R|T) sock_clnt_options="$sock_clnt_options -$opt \"$OPTARG\""
           ;;
  U|B|V|X) sock_clnt_options="$sock_clnt_options -$opt"
           ;;
       \?)
           echo "ERROR: Invalid option: -$OPTARG" >&2
           usage
           ;;
        :)
           echo "ERROR: Option -$OPTARG requires an argument." >&2
           usage
           ;;
    esac
done

shift $(( $OPTIND-1 ))
while ! [[ $run_test ]] && (( $# > 0 )) ; do
    case $1 in
        "nk" | "native-kernel")
            run_test="native_kernel" ;;
        "np" | "native-preload")
            run_test="native_preload" ;;
        "nv" | "native-vcl")
            sock_srvr_app="vcl_test_server"
            sock_clnt_app="vcl_test_client"
            run_test="native_vcl" ;;
        "dk" | "docker-kernel")
            run_test="docker_kernel" ;;
        "dp" | "docker-preload")
            run_test="docker_preload" ;;
        "dv" | "docker-vcl")
            sock_srvr_app="vcl_test_server"
            sock_clnt_app="vcl_test_client"
            run_test="docker_vcl" ;;
        *)
            echo "ERROR: Unknown option '$1'!" >&2
            usage ;;
    esac
    shift
done

if [ -z "$VCL_DEBUG" ] ; then
    if [ "$title_dbg" = "-DEBUG" ] ; then
        VCL_DEBUG=1
    else
        VCL_DEBUG=0
    fi
fi

VCL_LDPRELOAD_LIB_DIR="${VCL_LDPRELOAD_LIB_DIR:-$lib64_dir}"

if [ -z "$WS_ROOT" ] ; then
    echo "ERROR: WS_ROOT environment variable not set!" >&2
    echo "       Please set WS_ROOT to VPP workspace root directory." >&2
    exit 1
fi

if [[ "$(grep bin_PROGRAMS $WS_ROOT/src/vcl.am)" = "" ]] ; then
    $WS_ROOT/extras/vagrant/vcl_test.sh $WS_ROOT $USER
    (cd $WS_ROOT; make build)
fi

if [ ! -d $vpp_dir ] ; then
    echo "ERROR: Missing VPP$title_dbg bin directory!" >&2
    echo "       $vpp_dir" >&2
    env_test_failed="true"
fi

if [[ $run_test =~ .*"_preload" ]] ; then
   if [ ! -d $lib64_dir ] ; then
       echo "ERROR: Missing VPP$title_dbg lib64 directory!" >&2
       echo "       $lib64_dir" >&2
   elif [ ! -d $VCL_LDPRELOAD_LIB_DIR ] ; then
       echo "ERROR: Missing VCL LD_PRELOAD Library directory!" >&2
       echo "       $VCL_LDPRELOAD_LIB_DIR" >&2
       env_test_failed="true"
   elif [ ! -f $VCL_LDPRELOAD_LIB_DIR/$vcl_ldpreload_lib ] ; then
       echo "ERROR: Missing VCL LD_PRELOAD library!" >&2
       echo "       $VCL_LDPRELOAD_LIB_DIR/$vcl_ldpreload_lib" >&2
       env_test_failed="true"
   fi
fi

if [ ! -f $vpp_dir$vpp_app ] ; then
    echo "ERROR: Missing VPP$title_dbg Application!" >&2
    echo "       $vpp_dir$vpp_app" >&2
    env_test_failed="true"
fi

if [ ! -f $vpp_dir$sock_srvr_app ] && [ ! $iperf3 -eq 1 ] ; then
    echo "ERROR: Missing$title_dbg Socket Server Application!" >&2
    echo "       $vpp_dir$sock_srvr_app" >&2
    env_test_failed="true"
fi

if [ ! -f $vpp_dir$sock_clnt_app ] && [ ! $iperf3 -eq 1 ] ; then
    echo "ERROR: Missing$title_dbg Socket Client Application!" >&2
    echo "       $vpp_dir$sock_clnt_app" >&2
    env_test_failed="true"
fi

if [[ $run_test =~ "docker_".* ]] ; then
    if [ $emacs_client -eq 1 ] || [ $emacs_server -eq 1 ] || [ $gdb_client -eq 1 ] || [ $gdb_server -eq 1 ] ; then
        
        echo "WARNING: gdb is not currently supported in docker."
        echo "         Ignoring client/server gdb options."
        emacs_client=0
        emacs_server=0
        gdb_client=0
        gdb_server=0
    fi
fi

if [[ $run_test =~ .*"_vcl" ]] && [ $iperf3 -eq 1 ] ; then
    echo "ERROR: Invalid option 'i' for test $run_test!"
    echo "       iperf3 is not compiled with the VCL library."
    env_test_failed="true"
fi

if [ -n "$multi_host"] && [ ! -f "$dpdk_devbind" ] ; then
    echo "ERROR: Can't find dpdk-devbind.py!"
    echo "       Run \"cd \$WS_ROOT; make dpdk-install-dev\" to install it."
    echo
    env_test_failed="true"
fi

if [ -n "$full_thru_host_stack_vpp_cfg" ] && [ -n "$multi_host" ] ; then
    echo "ERROR: Invalid options, cannot specify both \"-f\" and \"-m $multi_host\"!"
    echo
    env_test_failed="true"
fi

if [ -n "$env_test_failed" ] ; then
    exit 1
fi

if [ -f "$VCL_CONFIG" ] ; then
    vcl_config="$(basename $VCL_CONFIG)"
    vcl_config_dir="$(dirname $VCL_CONFIG)/"
    api_prefix="$(egrep -s '^\s*api-prefix \w+' $VCL_CONFIG | tail -1 | awk -e '{print $2}')"
    if [ -n "$api_prefix" ] ; then
        api_segment=" api-segment { gid $user_gid prefix $api_prefix }"
    fi
fi
if [ -n "$VCL_APP_NAMESPACE_ID" ] && [ -n "$VCL_APP_NAMESPACE_SECRET" ] ; then
    namespace_id="$VCL_APP_NAMESPACE_ID"
    namespace_secret="$VCL_APP_NAMESPACE_SECRET"
fi
    
if [ -z "$api_segment" ] ; then
    api_segment=" api-segment { gid $user_gid }"
fi
vpp_args="unix { interactive full-coredump coredump-size unlimited exec $tmp_vpp_exec_file}${api_segment}"

if [ $iperf3 -eq 1 ] ; then
    app_dir="$(dirname $(which iperf3))/"
    srvr_app=$iperf_srvr_app
    clnt_app=$iperf_clnt_app
    if [[ $run_test =~ "docker_".* ]] ; then
        unset -v app_dir
        sock_srvr_port=5201
        docker_app_dir="networkstatic/"
        unset -v docker_os
    fi
else
    app_dir="$vpp_dir"
    srvr_app="$sock_srvr_app $sock_srvr_port"
    clnt_app="$sock_clnt_app${sock_clnt_options} \$srvr_addr $sock_srvr_port"
fi


verify_no_vpp() {
    local grep_for_vpp="ps -eaf|grep -v grep|grep \"bin/vpp\""
    
    if [ -n "$api_prefix" ] ; then
        grep_for_vpp="$grep_for_vpp|grep \"prefix $api_prefix\""
    fi
    local running_vpp="$(eval $grep_for_vpp)"
    if [ -n "$running_vpp" ] ; then
        echo "ERROR: Please kill the following vpp instance(s):"
        echo
        echo $running_vpp
        echo
        exit 1
    fi
    clean_devshm="$vpp_shm_dir*db $vpp_shm_dir*global_vm $vpp_shm_dir*vpe-api $vpp_shm_dir[0-9]*-[0-9]* $vpp_shm_dir*:segment[0-9]*"
    sudo rm -f $clean_devshm
    devshm_files="$(ls -l $clean_devshm 2>/dev/null | grep $(whoami))"
    if [ "$devshm_files" != "" ] ; then
        echo "ERROR: Please remove the following $vpp_shm_dir files:"
        for file in "$devshm_files" ; do
            echo "  $file"
        done
        exit 1
    fi
    if [ ! -d "$vpp_run_dir" ] ; then
        sudo mkdir $vpp_run_dir
        sudo chown root:$USER $vpp_run_dir
    fi
    if [ -n "$full_thru_host_stack_vpp_cfg" ] ; then
        sock_srvr_addr=172.16.1.1
        client_namespace_id="1"
        client_namespace_secret="5678"
        server_namespace_id="0"
        server_namespace_secret="1234"
        cat <<EOF >> $tmp_vpp_exec_file
session enable
create loop inter
create loop inter
set inter state loop0 up 
set inter ip table loop0 0
set inter ip address loop0 172.16.1.1/24
set inter state loop1 up
set inter ip table loop1 1
set inter ip address loop1 172.16.2.1/24
app ns add id 0 secret 1234 sw_if_index 1
app ns add id 1 secret 5678 sw_if_index 2
ip route add 172.16.1.1/32 table 1 via lookup in table 0
ip route add 172.16.2.1/32 table 0 via lookup in table 1
EOF

    elif [ -n "$multi_host" ] ; then
        vpp_eth_pci_id="$(ls -ld /sys/class/net/$vpp_eth_name/device | awk '{print $11}' | cut -d/ -f4)"
        if [ -z "$vpp_eth_pci_id" ] ; then
            echo "ERROR: Missing ethernet interface $vpp_eth_name!"
            usage
        fi
        printf -v bus "%x" "0x$(echo $vpp_eth_pci_id | cut -d: -f2)"
        printf -v slot "%x" "0x$(echo $vpp_eth_pci_id | cut -d: -f3 | cut -d. -f1)"
        printf -v func "%x" "0x$(echo $vpp_eth_pci_id | cut -d. -f2)"

        vpp_eth_kernel_driver="$(basename $(ls -l /sys/bus/pci/devices/$vpp_eth_pci_id/driver | awk '{print $11}'))"
        if [ -z "$vpp_eth_kernel_driver" ] ; then
            echo "ERROR: Missing kernel driver for $vpp_eth_name!"
            usage
        fi
        case $vpp_eth_kernel_driver in
            e1000)
                vpp_eth_ifname="GigabitEthernet$bus/$slot/$func" ;;
            ixgbe)
                vpp_eth_ifname="TenGigabitEthernet$bus/$slot/$func" ;;
            i40e)
                vpp_eth_ifname="FortyGigabitEthernet$bus/$slot/$func" ;;
            *)
                echo "ERROR: Unknown ethernet kernel driver $vpp_eth_kernel_driver!"
                usage ;;
        esac
        
        vpp_eth_ip4_addr="$(ip -4 -br addr show $vpp_eth_name | awk '{print $3}')"
        if [ -z "$vpp_eth_ip4_addr" ] ; then
            if [ "$multi_host" = "server" ] ; then
                vpp_eth_ip4_addr="10.10.10.10/24"
            else
                vpp_eth_ip4_addr="10.10.10.11/24"
            fi
        fi
        if [ $use_ipv6 -eq 1 ] && [ -z "$vpp_eth_ip6_addr" ] ; then
            echo "ERROR: No inet6 address configured for $vpp_eth_name!"
            usage
        fi
        vpp_args="$vpp_args plugins { path ${lib64_dir}vpp_plugins } dpdk { dev $vpp_eth_pci_id }"
                
        sudo ifconfig $vpp_eth_name down 2> /dev/null
        echo "Configuring VPP to use $vpp_eth_name ($vpp_eth_pci_id), inet addr $vpp_eth_ip4_addr"

        cat <<EOF >> $tmp_vpp_exec_file
set int state $vpp_eth_ifname up
set int ip addr $vpp_eth_ifname $vpp_eth_ip4_addr
EOF

    fi

    if [ -z "$full_thru_host_stack_vpp_cfg" ] && [ -n "$namespace_id" ] ; then
        cat <<EOF >> $tmp_vpp_exec_file
session enable
app ns add id $namespace_id secret $namespace_secret sw_if_index 0
EOF
    fi
    
    cat <<EOF >> $tmp_vpp_exec_file
show version
show version verbose
show cpu
show int
EOF
}

verify_no_docker_containers() {
    if (( $(which docker | wc -l) < 1 )) ; then
        echo "ERROR: docker is not installed!"
        echo "See https://docs.docker.com/engine/installation/linux/ubuntu/"
        echo " or https://docs.docker.com/engine/installation/linux/centos/"
        exit 1
    fi
    if (( $(docker ps | wc -l) > 1 )) ; then
        echo "ERROR: Run the following to kill all docker containers:"
        echo "docker kill \$(docker ps -q)"
        echo
        docker ps
        exit 1
    fi
}

set_pre_cmd() {
    # arguments
    #   $1 : emacs flag
    #   $2 : gdb flag
    #   $3 : optional LD_PRELOAD library pathname
    local -i emacs=$1
    local -i gdb=$2

    if [ $emacs -eq 1 ] ; then
        write_gdb_cmdfile $tmp_gdb_cmdfile $gdb_cmdfile $emacs $3
        pre_cmd="$gdb_in_emacs "
    elif [ $gdb -eq 1 ] ; then
        write_gdb_cmdfile $tmp_gdb_cmdfile $gdb_cmdfile $emacs $3
        pre_cmd="gdb -x $tmp_gdb_cmdfile --args "
    elif [ -z $3 ] ; then
        unset -v pre_cmd
    else
        docker_ld_preload="-e LD_PRELOAD=$3 "
        pre_cmd="LD_PRELOAD=$3 "
    fi
}

write_script_header() {
    # arguments
    #   $1 : command script file
    #   $2 : gdb command file
    #   $3 : title
    #   $4 : optional command string (typically "sleep 2")
    echo "$bash_header" > $1
    echo -e "#\n# $1 generated on $(date)\n#" >> $1
    if [ $leave_tmp_files -eq 0 ] ; then
        if [ -n "$multi_host" ] ; then
            echo "trap \"rm -f $1 $2 $tmp_vpp_exec_file; sudo $dpdk_devbind -b $vpp_eth_kernel_driver $vpp_eth_pci_id; sudo ifconfig $vpp_eth_name up\" $trap_signals" >> $1
        else
            echo "trap \"rm -f $1 $2 $tmp_vpp_exec_file\" $trap_signals" >> $1
        fi
    fi
    if [ -n "$VCL_CONFIG" ] ; then
        echo "export VCL_CONFIG=${vcl_config_dir}${vcl_config}" >> $1
    fi
    if [ -n "$VCL_API_PREFIX" ] ; then
        echo "export VCL_API_PREFIX=$VCL_API_PREFIX" >> $1
    fi
    if [ -n "$VCL_DEBUG" ] ; then
        echo "export VCL_DEBUG=$VCL_DEBUG" >> $1
    fi
    if [ -n "$LDP_DEBUG" ] ; then
        echo "export LDP_DEBUG=$LDP_DEBUG" >> $1
    fi
    if [ -n "$VCOM_APP_NAME" ] ; then
        echo "export VCOM_APP_NAME=$VCOM_APP_NAME" >> $1
    fi
    if [ -n "$VCOM_SID_BIT" ] ; then
        echo "export VCOM_SID_BIT=$VCOM_SID_BIT" >> $1
    fi
    if [ -n "$namespace_id" ] ; then
        echo "export VCL_APP_NAMESPACE_ID=\"$namespace_id\"" >> $1
        echo "export VCL_APP_NAMESPACE_SECRET=\"$namespace_secret\"" >> $1
    fi
    if [ -n "$VCL_APP_SCOPE_LOCAL" ] || [ -z "$multi_host" ] &&
           [ -z "$full_thru_host_stack_vpp_cfg" ] ; then
        echo "export VCL_APP_SCOPE_LOCAL=true" >> $1
    fi
    if [ -n "$VCL_APP_SCOPE_GLOBAL" ] || [ -n "$multi_host" ] ||
           [ -n "$full_thru_host_stack_vpp_cfg" ] ; then
        echo "export VCL_APP_SCOPE_GLOBAL=true" >> $1
    fi
    if [ -n "$VCL_APP_PROXY_TRANSPORT_TCP" ] ; then
        echo "export VCL_APP_PROXY_TRANSPORT_TCP=true" >> $1
    fi
    if [ -n "$VCL_APP_PROXY_TRANSPORT_UDP" ] ; then
        echo "export VCL_APP_PROXY_TRANSPORT_UDP=true" >> $1
    fi
    if [ "$pre_cmd" = "$gdb_in_emacs " ] ; then
        if [ -n "$multi_host" ] && [[ $3 =~ "VPP".* ]] ; then
            cat <<EOF >> $1
$gdb_in_emacs() {
    sudo emacs --eval "(gdb \"gdb -x $2 -i=mi --args \$*\")" --eval "(setq frame-title-format \"$3\")"
}
EOF
        else
            cat <<EOF >> $1
$gdb_in_emacs() {
    emacs --eval "(gdb \"gdb -x $2 -i=mi --args \$*\")" --eval "(setq frame-title-format \"$3\")"
}
EOF
        fi
    fi
    if [ -n "$4" ] ; then
        echo "$4" >> $1
    fi
}

write_script_footer() {
    # arguments
    #   $1 : command script file
    #   $2 : perf flag indicating to run bash before exit
    local -i perf=$2
    if [ $bash_after_exit -eq 1 ] || [ $perf -eq 1 ] ; then
        echo "bash" >> $1
    fi
}

write_gdb_cmdfile() {
    # arguments
    #   $1 : gdb command file
    #   $2 : User specified gdb cmdfile
    #   $3 : emacs flag
    #   $4 : optional LD_PRELOAD library pathname.
    local -i emacs=$3
    
    echo "# $1 generated on $(date)" > $1
    echo "#" >> $1
    echo "set confirm off" >> $1
    if [ -n "$4" ] ; then
        echo "set exec-wrapper env LD_PRELOAD=$4" >> $1
        # echo "start" >> $1
    fi

    if [ ! -f $2 ] ; then
        echo -n "# " >> $1
    fi
    echo "source $2" >> $1
    if [ $emacs -eq 0 ] ; then
        echo "run" >> $1
    fi
}

native_kernel() {
    banner="Running NATIVE-KERNEL socket test"
    if [ -z "$multi_host" ] || [ "$multi_host" = "server" ] ; then
        title1="SERVER$title_dbg (Native-Kernel Socket Test)"
        tmp_gdb_cmdfile=$tmp_gdb_cmdfile_server
        gdb_cmdfile=$VPPCOM_SERVER_GDB_CMDFILE
        set_pre_cmd $emacs_server $gdb_server
        write_script_header $cmd1_file $tmp_gdb_cmdfile "$title1"
        echo "${pre_cmd}${app_dir}${srvr_app}" >> $cmd1_file
        write_script_footer $cmd1_file $perf_server
        chmod +x $cmd1_file
    fi
    
    if [ -z "$multi_host" ] || [ "$multi_host" = "client" ] ; then
        title2="CLIENT$title_dbg (Native-Kernel Socket Test)"
        tmp_gdb_cmdfile=$tmp_gdb_cmdfile_client
        gdb_cmdfile=$VPPCOM_CLIENT_GDB_CMDFILE
        set_pre_cmd $emacs_client $gdb_client
        write_script_header $cmd2_file $tmp_gdb_cmdfile "$title2" "sleep 2"
        echo "srvr_addr=\"$sock_srvr_addr\"" >> $cmd2_file
        echo "${pre_cmd}${app_dir}${clnt_app}" >> $cmd2_file
        write_script_footer $cmd2_file $perf_client
        chmod +x $cmd2_file

    fi
}

native_preload() {
    verify_no_vpp
    banner="Running NATIVE-PRELOAD socket test"
    ld_preload="$VCL_LDPRELOAD_LIB_DIR/$vcl_ldpreload_lib "

    title1="VPP$title_dbg (Native-Preload Socket Test)"
    tmp_gdb_cmdfile=$tmp_gdb_cmdfile_vpp
    gdb_cmdfile=$VPP_GDB_CMDFILE
    set_pre_cmd $emacs_vpp $gdb_vpp
    write_script_header $cmd1_file $tmp_gdb_cmdfile "$title1"
    if [ -n "$multi_host" ] && [ $emacs_vpp -eq 0 ] ; then
        echo -n "sudo " >> $cmd1_file
    fi
    echo "${pre_cmd}$vpp_dir$vpp_app $vpp_args " >> $cmd1_file
    write_script_footer $cmd1_file $perf_vpp
    chmod +x $cmd1_file

    if [ -z "$multi_host" ] || [ "$multi_host" = "server" ] ; then
        title2="SERVER$title_dbg (Native-Preload Socket Test)"
        tmp_gdb_cmdfile=$tmp_gdb_cmdfile_server
        gdb_cmdfile=$VPPCOM_SERVER_GDB_CMDFILE
        set_pre_cmd $emacs_server $gdb_server $ld_preload
        if [ -n "$full_thru_host_stack_vpp_cfg" ] ; then
            namespace_id="$server_namespace_id"
            namespace_secret="$server_namespace_secret"
        fi
        write_script_header $cmd2_file $tmp_gdb_cmdfile "$title2" "sleep 2"
        echo "export LD_LIBRARY_PATH=\"$lib64_dir:$VCL_LDPRELOAD_LIB_DIR:$LD_LIBRARY_PATH\"" >> $cmd2_file
        echo "${pre_cmd}${app_dir}${srvr_app}" >> $cmd2_file
        write_script_footer $cmd2_file $perf_server
        chmod +x $cmd2_file
    fi

    if [ -z "$multi_host" ] || [ "$multi_host" = "client" ] ; then
        title3="CLIENT$title_dbg (Native-Preload Socket Test)"
        tmp_gdb_cmdfile=$tmp_gdb_cmdfile_client
        gdb_cmdfile=$VPPCOM_CLIENT_GDB_CMDFILE
        set_pre_cmd $emacs_client $gdb_client $ld_preload
        if [ -n "$full_thru_host_stack_vpp_cfg" ] ; then
            namespace_id="$client_namespace_id"
            namespace_secret="$client_namespace_secret"
        fi
        write_script_header $cmd3_file $tmp_gdb_cmdfile "$title3" "sleep 4"
        echo "export LD_LIBRARY_PATH=\"$lib64_dir:$VCL_LDPRELOAD_LIB_DIR:$LD_LIBRARY_PATH\"" >> $cmd3_file
        echo "srvr_addr=\"$sock_srvr_addr\"" >> $cmd3_file
        echo "${pre_cmd}${app_dir}${clnt_app}" >> $cmd3_file
        write_script_footer $cmd3_file $perf_client
        chmod +x $cmd3_file
    fi
}

native_vcl() {
    verify_no_vpp
    banner="Running NATIVE-VCL socket test"

    title1="VPP$title_dbg (Native-VCL Socket Test)"
    tmp_gdb_cmdfile=$tmp_gdb_cmdfile_vpp
    gdb_cmdfile=$VPP_GDB_CMDFILE
    set_pre_cmd $emacs_vpp $gdb_vpp
    write_script_header $cmd1_file $tmp_gdb_cmdfile "$title1"
    if [ -n "$multi_host" ] && [ $emacs_vpp -eq 0 ] ; then
        echo -n "sudo " >> $cmd1_file
    fi
    echo "${pre_cmd}$vpp_dir$vpp_app $vpp_args " >> $cmd1_file
    write_script_footer $cmd1_file $perf_vpp
    chmod +x $cmd1_file

    if [ -z "$multi_host" ] || [ "$multi_host" = "server" ] ; then
        title2="SERVER$title_dbg (Native-VCL Socket Test)"
        tmp_gdb_cmdfile=$tmp_gdb_cmdfile_server
        gdb_cmdfile=$VPPCOM_SERVER_GDB_CMDFILE
        set_pre_cmd $emacs_server $gdb_server
        if [ "$multi_host" = "server" ] ; then
            delay="sleep 10"
        else
            delay="sleep 3"
        fi
        if [ -n "$full_thru_host_stack_vpp_cfg" ] ; then
            namespace_id="$server_namespace_id"
            namespace_secret="$server_namespace_secret"
        fi
        write_script_header $cmd2_file $tmp_gdb_cmdfile "$title2" "$delay"
        echo "export LD_LIBRARY_PATH=\"$lib64_dir:$LD_LIBRARY_PATH\"" >> $cmd2_file
        echo "${pre_cmd}${app_dir}${srvr_app}" >> $cmd2_file
        write_script_footer $cmd2_file $perf_server
        chmod +x $cmd2_file
    fi

    if [ -z "$multi_host" ] || [ "$multi_host" = "client" ] ; then
        title3="CLIENT$title_dbg (Native-VCL Socket Test)"
        tmp_gdb_cmdfile=$tmp_gdb_cmdfile_client
        gdb_cmdfile=$VPPCOM_CLIENT_GDB_CMDFILE
        set_pre_cmd $emacs_client $gdb_client
        if [ "$multi_host" = "client" ] ; then
            delay="sleep 10"
        else
            delay="sleep 4"
        fi
        if [ -n "$full_thru_host_stack_vpp_cfg" ] ; then
            namespace_id="$client_namespace_id"
            namespace_secret="$client_namespace_secret"
        fi
        write_script_header $cmd3_file $tmp_gdb_cmdfile "$title3" "$delay"
        echo "export LD_LIBRARY_PATH=\"$lib64_dir:$LD_LIBRARY_PATH\"" >> $cmd3_file
        echo "srvr_addr=\"$sock_srvr_addr\"" >> $cmd3_file
        echo "${pre_cmd}${app_dir}${clnt_app}" >> $cmd3_file
        write_script_footer $cmd3_file $perf_client
        chmod +x $cmd3_file
    fi
}

docker_kernel() {
    verify_no_docker_containers
    banner="Running DOCKER-KERNEL socket test"
    
    if [ -z "$multi_host" ] || [ "$multi_host" = "server" ] ; then
        title1="SERVER$title_dbg (Docker-Native Socket Test)"
        tmp_gdb_cmdfile=$tmp_gdb_cmdfile_server
        gdb_cmdfile=$VPPCOM_SERVER_GDB_CMDFILE
        set_pre_cmd $emacs_server $gdb_server
        write_script_header $cmd1_file $tmp_gdb_cmdfile "$title1"
        echo "docker run -it --cpuset-cpus='4-7' --cpuset-cpus='4-7' -v $vpp_dir:$docker_vpp_dir -p $sock_srvr_port:$sock_srvr_port $docker_os ${docker_app_dir}${srvr_app}" >> $cmd1_file
        write_script_footer $cmd1_file $perf_server
        chmod +x $cmd1_file
    fi
    
    if [ -z "$multi_host" ] || [ "$multi_host" = "client" ] ; then
        title2="CLIENT$title_dbg (Docker-Native Socket Test)"
        tmp_gdb_cmdfile=$tmp_gdb_cmdfile_client
        gdb_cmdfile=$VPPCOM_CLIENT_GDB_CMDFILE
        set_pre_cmd $emacs_client $gdb_client
        write_script_header $cmd2_file $tmp_gdb_cmdfile "$title2" "sleep 2"
        echo "$get_docker_server_ip4addr" >> $cmd2_file
        echo "docker run -it --cpuset-cpus='4-7' -v $vpp_dir:$docker_vpp_dir $docker_os ${docker_app_dir}${clnt_app}" >> $cmd2_file
        write_script_footer $cmd2_file $perf_client
        chmod +x $cmd2_file
    fi
}

docker_preload() {
    verify_no_vpp
    verify_no_docker_containers
    banner="Running DOCKER-PRELOAD socket test"
    docker_ld_preload_dir="/vcl-ldpreload/"
    ld_preload_dir="$VCL_LDPRELOAD_LIB_DIR"
    ld_preload="$docker_ld_preload_dir$vcl_ldpreload_lib "
    docker_ld_preload_lib="$docker_ld_preload_dir$vcl_ldpreload_lib "
    
    title1="VPP$title_dbg (Docker-Preload Socket Test)"
    tmp_gdb_cmdfile=$tmp_gdb_cmdfile_vpp
    gdb_cmdfile=$VPP_GDB_CMDFILE
    set_pre_cmd $emacs_vpp $gdb_vpp
    write_script_header $cmd1_file $tmp_gdb_cmdfile "$title1"
    if [ -n "$multi_host" ] ; then
        echo -n "sudo " >> $cmd1_file
    fi
    echo "${pre_cmd}$vpp_dir$vpp_app $vpp_args" >> $cmd1_file
    write_script_footer $cmd1_file $perf_vpp
    chmod +x $cmd1_file

    if [ -z "$multi_host" ] || [ "$multi_host" = "server" ] ; then
        title2="SERVER$title_dbg (Docker-Preload Socket Test)"
        tmp_gdb_cmdfile=$tmp_gdb_cmdfile_server
        gdb_cmdfile=$VPPCOM_SERVER_GDB_CMDFILE
        set_pre_cmd $emacs_server $gdb_server $docker_ld_preload_lib
        if [ -n "$full_thru_host_stack_vpp_cfg" ] ; then
            namespace_id="$server_namespace_id"
            namespace_secret="$server_namespace_secret"
        fi
        write_script_header $cmd2_file $tmp_gdb_cmdfile "$title2" "sleep 2"
        echo "docker run -it -v $vpp_shm_dir:$vpp_shm_dir -v $vpp_dir:$docker_vpp_dir -v $lib64_dir:$docker_lib64_dir -v $ld_preload_dir:$docker_ld_preload_dir -v $vcl_config_dir:$docker_vcl_config_dir -p $sock_srvr_port:$sock_srvr_port -e VCL_DEBUG=$VCL_DEBUG -e VCL_CONFIG=${docker_vcl_config_dir}$vcl_config -e LD_LIBRARY_PATH=$docker_lib64_dir:$docker_ld_preload_dir ${docker_ld_preload}$docker_os ${docker_app_dir}${srvr_app}" >> $cmd2_file
        write_script_footer $cmd2_file $perf_server
        chmod +x $cmd2_file
    fi

    if [ -z "$multi_host" ] || [ "$multi_host" = "client" ] ; then
        title3="CLIENT$title_dbg (Docker-Preload Socket Test)"
        tmp_gdb_cmdfile=$tmp_gdb_cmdfile_client
        gdb_cmdfile=$VPPCOM_CLIENT_GDB_CMDFILE
        set_pre_cmd $emacs_client $gdb_client $docker_ld_preload_lib
        if [ -n "$full_thru_host_stack_vpp_cfg" ] ; then
            namespace_id="$client_namespace_id"
            namespace_secret="$client_namespace_secret"
        fi
        write_script_header $cmd3_file $tmp_gdb_cmdfile "$title3" "sleep 4"
        echo "$get_docker_server_ip4addr" >> $cmd3_file
        echo "docker run -it --cpuset-cpus='4-7' -v $vpp_shm_dir:$vpp_shm_dir -v $vpp_dir:$docker_vpp_dir -v $lib64_dir:$docker_lib64_dir  -v $ld_preload_dir:$docker_ld_preload_dir -v $vcl_config_dir:$docker_vcl_config_dir -e VCL_DEBUG=$VCL_DEBUG -e VCL_CONFIG=${docker_vcl_config_dir}$vcl_config -e LD_LIBRARY_PATH=$docker_lib64_dir ${docker_ld_preload}$docker_os ${docker_app_dir}${clnt_app}" >> $cmd3_file
        write_script_footer $cmd3_file $perf_client
        chmod +x $cmd3_file
    fi
}

docker_vcl() {
    verify_no_vpp
    verify_no_docker_containers
    banner="Running DOCKER-VCL socket test"
    
    title1="VPP$title_dbg (Docker-VCL Socket Test)"
    tmp_gdb_cmdfile=$tmp_gdb_cmdfile_vpp
    gdb_cmdfile=$VPP_GDB_CMDFILE
    set_pre_cmd $emacs_vpp $gdb_vpp
    write_script_header $cmd1_file $tmp_gdb_cmdfile "$title1"
    if [ -n "$multi_host" ] ; then
        echo -n "sudo " >> $cmd1_file
    fi
    echo "${pre_cmd}$vpp_dir$vpp_app $vpp_args" >> $cmd1_file
    write_script_footer $cmd1_file $perf_vpp
    chmod +x $cmd1_file

    if [ -z "$multi_host" ] || [ "$multi_host" = "server" ] ; then
        title2="SERVER$title_dbg (Docker-VCL Socket Test)"
        tmp_gdb_cmdfile=$tmp_gdb_cmdfile_server
        gdb_cmdfile=$VPPCOM_SERVER_GDB_CMDFILE
        set_pre_cmd $emacs_server $gdb_server
        if [ -n "$full_thru_host_stack_vpp_cfg" ] ; then
            namespace_id="$server_namespace_id"
            namespace_secret="$server_namespace_secret"
        fi
        write_script_header $cmd2_file $tmp_gdb_cmdfile "$title2" "sleep 2"
        echo "docker run -it --cpuset-cpus='4-7' -v $vpp_shm_dir:$vpp_shm_dir -v $vpp_dir:$docker_vpp_dir -v $lib64_dir:$docker_lib64_dir -v $vcl_config_dir:$docker_vcl_config_dir -p $sock_srvr_port:$sock_srvr_port -e VCL_CONFIG=${docker_vcl_config_dir}/$vcl_config -e LD_LIBRARY_PATH=$docker_lib64_dir $docker_os ${docker_app_dir}${srvr_app}" >> $cmd2_file
        write_script_footer $cmd2_file $perf_server
        chmod +x $cmd2_file
    fi

    if [ -z "$multi_host" ] || [ "$multi_host" = "client" ] ; then
        title3="CLIENT$title_dbg (Docker-VCL Socket Test)"
        tmp_gdb_cmdfile=$tmp_gdb_cmdfile_client
        gdb_cmdfile=$VPPCOM_CLIENT_GDB_CMDFILE
        set_pre_cmd $emacs_client $gdb_client
        if [ -n "$full_thru_host_stack_vpp_cfg" ] ; then
            namespace_id="$client_namespace_id"
            namespace_secret="$client_namespace_secret"
        fi
        write_script_header $cmd3_file $tmp_gdb_cmdfile "$title3" "sleep 3"
        echo "$get_docker_server_ip4addr" >> $cmd3_file
        echo "docker run -it --cpuset-cpus='4-7' -v $vpp_shm_dir:$vpp_shm_dir -v $vpp_dir:$docker_vpp_dir -v $lib64_dir:$docker_lib64_dir -v $vcl_config_dir:$docker_vcl_config_dir -e VCL_CONFIG=${docker_vcl_config_dir}/$vcl_config -e LD_LIBRARY_PATH=$docker_lib64_dir $docker_os ${docker_app_dir}${clnt_app}" >> $cmd3_file
        write_script_footer $cmd3_file $perf_client
        chmod +x $cmd3_file
    fi
}

if [[ $run_test ]] ; then
    eval $run_test
else
    echo "ERROR: Please specify a test to run!" >&2
    usage;
fi

if (( $(which xfce4-terminal | wc -l) > 0 )) ; then
    xterm_cmd="xfce4-terminal --geometry $xterm_geom"
    if [[ $use_tabs ]] ; then
        declare -a tab_cmd_files
        declare -a tab_titles
        declare -i i=0

        if [ -x "$cmd1_file" ] ; then
            tab_cmd_files[$i]="$cmd1_file"
            tab_titles[$i]="$title1"
            (( i++ ))
        fi
        if [ -x "$cmd2_file" ] ; then
            tab_cmd_files[$i]="$cmd2_file"
            tab_titles[$i]="$title2"
            (( i++ ))
        fi
        if [ -x "$cmd3_file" ] ; then
            tab_cmd_files[$i]="$cmd3_file"
            tab_titles[$i]="$title3"
        fi

        if [ -n "${tab_cmd_files[2]}" ] ; then
            $xterm_cmd  --title "${tab_titles[0]}" --command "${tab_cmd_files[0]}" --tab --title "${tab_titles[1]}" --command "${tab_cmd_files[1]}" --tab --title "${tab_titles[2]}" --command "${tab_cmd_files[2]}"
        elif [ -n "${tab_cmd_files[1]}" ] ; then
            $xterm_cmd --title "${tab_titles[0]}" --command "${tab_cmd_files[0]}" --tab --title "${tab_titles[1]}" --command "${tab_cmd_files[1]}"

        else
            $xterm_cmd --title "${tab_titles[0]}" --command "${tab_cmd_files[0]}"
        fi
        
    else
        if [ -x "$cmd1_file" ] ; then
            ($xterm_cmd --title "$title1" --command "$cmd1_file" &)
        fi
        if [ -x "$cmd2_file" ] ; then
            ($xterm_cmd --title "$title2" --command "$cmd2_file" &)
        fi
        if [ -x "$cmd3_file" ] ; then
            ($xterm_cmd --title "$title3" --command "$cmd3_file" &)
        fi
    fi
        
else
    if [[ $use_tabs ]] ; then
        echo "Sorry, plain ol' xterm doesn't support tabs."
    fi
    xterm_cmd="xterm -fs 10 -geometry $xterm_geom"
    if [ -x "$cmd1_file" ] ; then
        ($xterm_cmd -title "$title1" -e "$cmd1_file" &)
    fi
    if [ -x "$cmd2_file" ] ; then
        ($xterm_cmd -title "$title2" -e "$cmd2_file" &)
    fi
    if [ -x "$cmd3_file" ] ; then
        ($xterm_cmd -title "$title3" -e "$cmd3_file" &)
    fi
fi

sleep 1