summaryrefslogtreecommitdiffstats
path: root/hl/tools/h5watch/h5watch.c
blob: 7ad737c81747ebc197da178d74ca0b4f79be7f47 (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
974
975
976
977
978
979
980
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
 * Copyright by The HDF Group.                                               *
 * Copyright by the Board of Trustees of the University of Illinois.         *
 * All rights reserved.                                                      *
 *                                                                           *
 * This file is part of HDF5.  The full HDF5 copyright notice, including     *
 * terms governing use, modification, and redistribution, is contained in    *
 * the COPYING file, which can be found at the root of the source code       *
 * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
 * If you do not have access to either file, you may request a copy from     *
 * help@hdfgroup.org.                                                        *
 * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

#include "h5tools.h"
#include "h5tools_dump.h"
#include "H5LDprivate.h"

/*
 * Note: This tool used private routine
 */
#define PROGRAMNAME     "h5watch"       /* Name of tool */
#define FIELD_SEP       ","             /* nested field separator */
#define DEFAULT_RETRY   50                /* number of times to try opening the file */


/*
 * Note:(see comments in hl/src/H5LDprivate.h)
 *  This tool uses private routines H5LD_construct_vector()and H5LD_clean_vector()
 *    This tool uses H5LD_memb_t data structure declared in H5LDprivate.h
 */

const char  *progname = "h5watch";          /* tool name */
static char *g_list_of_fields = NULL;       /* command line input for "list_of_fields" */
static char *g_dup_fields = NULL;           /* copy of "list_of_fields" */
static H5LD_memb_t **g_listv = NULL;        /* vector info for "list_of_fields" */

static hbool_t g_monitor_size_only = FALSE; /* monitor changes in dataset dimension sizes */
static unsigned g_polling_interval = 1;        /* polling interval to check appended data */

static hbool_t g_label = FALSE;             /* label compound values */
static int g_display_width = 80;            /* output width in characters */
static hbool_t g_simple_output = FALSE;     /* make output more machine-readable */
static unsigned g_retry = DEFAULT_RETRY;    /* # of times to try opening the file if somehow file is unstable */
static hbool_t g_display_hex = FALSE;       /* display data in hexadecimal format : LATER */
static hbool_t g_user_interrupt = FALSE;    /* Flag to indicate that user interrupted execution */

static herr_t doprint(hid_t did, hsize_t *start, hsize_t *block, int rank);
static herr_t slicendump(hid_t did, hsize_t *prev_dims, hsize_t *cur_dims,
  hsize_t *start, hsize_t *block, int rank, int subrank);
static herr_t monitor_dataset(hid_t fid, char *dsetname);
static herr_t process_cmpd_fields(hid_t fid, char *dsetname);
static herr_t check_dataset(hid_t fid, char *dsetname);
static void leave(int ret);
static void usage(const char *prog);
static void parse_command_line(int argc, const char *argv[]);


/*
 * Command-line options: The user can only specify long-named parameters.
 * The long-named ones can be partially spelled. When
 * adding more, make sure that they don't clash with each other.
 */
static const char *s_opts ="?";
static struct long_options l_opts[] = {
    { "help", no_arg, 'h' },
    { "hel", no_arg, 'h' },
    { "dim", no_arg, 'd' },
    { "di", no_arg, 'd' },
    { "label", no_arg, 'l' },
    { "labe", no_arg, 'l' },
    { "lab", no_arg, 'l' },
    { "la", no_arg, 'l' },
    { "simple", no_arg, 'S' },
    { "simpl", no_arg, 'S' },
    { "simp", no_arg, 'S' },
    { "sim", no_arg, 'S' },
    { "si", no_arg, 'S' },
    { "hexdump", no_arg, 'x' },
    { "hexdum", no_arg, 'x' },
    { "hexdu", no_arg, 'x' },
    { "hexd", no_arg, 'x' },
    { "hex", no_arg, 'x' },
    { "width", require_arg, 'w' },
    { "widt", require_arg, 'w' },
    { "wid", require_arg, 'w' },
    { "wi", require_arg, 'w' },
    { "polling", require_arg, 'p' },
    { "pollin", require_arg, 'p' },
    { "polli", require_arg, 'p' },
    { "poll", require_arg, 'p' },
    { "pol", require_arg, 'p' },
    { "po", require_arg, 'p' },
    { "fields", require_arg, 'f' },
    { "field", require_arg, 'f' },
    { "fiel", require_arg, 'f' },
    { "fie", require_arg, 'f' },
    { "fi", require_arg, 'f' },
    { "version", no_arg, 'V' },
    { "versio", no_arg, 'V' },
    { "versi", no_arg, 'V' },
    { "vers", no_arg, 'V' },
    { "ver", no_arg, 'V' },
    { "ve", no_arg, 'V' },
    { NULL, 0, '\0' }
};

/*-------------------------------------------------------------------------
 * Function: doprint()
 *
 * Purpose: Prepare to print the dataset's appended data.
 *          Call the tools library routine h5tools_dump_dset() to do the printing.
 *          (This routine is mostly copied from dump_dataset_values() in tools/h5ls/h5ls.c
 *          and modified accordingly).
 *
 * Return: 0 on success; negative on failure
 *
 * Programmer: Vailin Choi; August 2010
 *
 *-------------------------------------------------------------------------
 */
static herr_t
doprint(hid_t did, hsize_t *start, hsize_t *block, int rank)
{
    h5tools_context_t   ctx;      /* print context  */
    h5tool_format_t  info;    /* Format info for the tools library */
    static char fmt_double[16], fmt_float[16];    /* Format info */
    struct subset_t subset;    /* Subsetting info */
    hsize_t ss_start[H5S_MAX_RANK];    /* Info for hyperslab */
    hsize_t ss_stride[H5S_MAX_RANK];    /* Info for hyperslab */
    hsize_t ss_block[H5S_MAX_RANK];    /* Info for hyperslab */
    hsize_t ss_count[H5S_MAX_RANK];    /* Info for hyperslab */
    int i;            /* Local index variable */
    herr_t ret_value = SUCCEED; /* Return value */

    /* Subsetting information for the tools library printing routines */
    subset.start.data = ss_start;
    subset.stride.data = ss_stride;
    subset.block.data = ss_block;
    subset.count.data = ss_count;

    /* Initialize subsetting information */
    for(i = 0; i < rank; i++) {
        subset.stride.data[i] = 1;
        subset.count.data[i] = 1;
        subset.start.data[i] = start[i];
        subset.block.data[i] = block[i];
    } /* end for */

    HDmemset(&ctx, 0, sizeof(ctx));
    ctx.sset = &subset;

    /* Set to all default values and then override */
    HDmemset(&info, 0, sizeof info);

    if(g_simple_output) {
        info.idx_fmt = "";
        info.line_ncols = 65535; /*something big*/
        info.line_per_line = 1;
        info.line_multi_new = 0;
        info.line_pre  = "        ";
        info.line_cont = "         ";

        info.arr_pre = "";
        info.arr_suf = "";
        info.arr_sep = " ";

        info.cmpd_pre = "";
        info.cmpd_suf = "";
        info.cmpd_sep = " ";

        /* The "fields" selected by the user */
        info.cmpd_listv = (const struct H5LD_memb_t * const *)g_listv;

        if(g_label)
            info.cmpd_name = "%s=";

        info.elmt_suf1 = " ";
        info.str_locale = ESCAPE_HTML;

    } else {
        info.idx_fmt = "(%s)";
        if(!g_display_width) {
            info.line_ncols = 65535;
            info.line_per_line = 1;
        } /* end if */
        else
            info.line_ncols = (unsigned)g_display_width;

        info.line_multi_new = 1;

        /* The "fields" selected by the user */
        info.cmpd_listv = (const struct H5LD_memb_t * const *)g_listv;
        if(g_label)
            info.cmpd_name = "%s=";
        info.line_pre  = "        %s ";
        info.line_cont = "        %s  ";
        info.str_repeat = 8;
    } /* end else */

    /* Floating point types should display full precision */
    sprintf(fmt_float, "%%1.%dg", FLT_DIG);
    info.fmt_float = fmt_float;
    sprintf(fmt_double, "%%1.%dg", DBL_DIG);
    info.fmt_double = fmt_double;

    info.dset_format =  "DSET-%s ";
    info.dset_hidefileno = 0;

    info.obj_format = "-%lu:%" PRIuHADDR;
    info.obj_hidefileno = 0;

    info.dset_blockformat_pre = "%sBlk%lu: ";
    info.dset_ptformat_pre = "%sPt%lu: ";

    info.line_indent = "";

    if(g_display_hex) {
        /* Print all data in hexadecimal format if the `-x' or `--hexdump'
         * command line switch was given. */
        info.raw = TRUE;
    } /* end if */

    /* Print the values. */
    if((ret_value = h5tools_dump_dset(stdout, &info, &ctx, did)) < 0)
        error_msg("unable to print data\n");

    HDfprintf(stdout, "\n");

    return ret_value;

} /* end doprint() */

/*-------------------------------------------------------------------------
 * Function: slicendump
 *
 * Purpose:  To dump the slice for each dimension
 *           For example: prev_dims[2] = {5, 4}; cur_dims[2] = {7, 8}
 *              This routine will dump data as follows:
 *                  {0, 3} to {0, 7} (1x4 elements)
 *                  {1, 3} to {0, 7} (1x4 elements)
 *                  {2, 3} to {0, 7} (1x4 elements)
 *                  {3, 3} to {0, 7} (1x4 elements)
 *                  {4, 3} to {0, 7} (1x4 elements)
 *                  {5, 0} to {6, 7} (2x8 elements)
 *
 * Return:      Non-negative on success
 *              Negative on failure
 *
 * Programmer:  Vailin Choi; August 2010
 *
 *-------------------------------------------------------------------------
 */
static herr_t
slicendump(hid_t did, hsize_t *prev_dims, hsize_t *cur_dims, hsize_t *start, hsize_t *block, int rank, int subrank)
{
    int i;                      /* Local index variable */
    int ind;                    /* Index for the current rank */
    herr_t ret_value = SUCCEED; /* Return value */

    ind = rank - subrank;

    if((subrank - 1) > 0) {
        /* continue onto the next dimension */
        for (i = 0; i < (hssize_t)MIN(prev_dims[ind], cur_dims[ind]); i++){
            start[ind] = (hsize_t)i;
            if((ret_value = slicendump(did, prev_dims, cur_dims, start, block, rank, subrank-1)) < 0)
                goto done;
        } /* end for */
    } /* end if */

    /* this dimension remains the same or shrinking */
    if(cur_dims[ind] <= prev_dims[ind])
        goto done;

    /* select first the slice for the faster changing dimension */
    /* select later the whole slice for the slower changing dimension */
    start[ind] = prev_dims[ind];
    block[ind] = cur_dims[ind] - prev_dims[ind];

    for(i = ind + 1; i < rank; i++){
        start[i] = 0;
        block[i] = cur_dims[i];
    } /* end for */

    /* Print the appended data */
    ret_value = doprint(did, start, block, rank);

done:
    return ret_value;
} /* end slicendump() */


/*-------------------------------------------------------------------------
 * Function:    monitor_dataset
 *
 * Purpose:     To poll a dataset periodically for changes in dimension sizes.
 *              For dataset with unchanged and/or decreased dimension sizes:
 *                  it just prints the dimension size changes
 *              For dataset with increase in at least one of its dimension sizes:
 *                  it will print the new appended data to the dataset
 *
 * Return:      Non-negative on success: dataset can be monitored
 *              Negative on failure: dataset cannot be monitored
 *
 * Programmer:  Vailin Choi; August 2010
 *
 *-------------------------------------------------------------------------
 */
static herr_t
monitor_dataset(hid_t fid, char *dsetname)
{
    hid_t did;        /* dataset id */
    hid_t sid;        /* dataspace id */
    int    ndims;        /* # of dimensions in the dataspace */
    int i, u;        /* local index variable */
    hsize_t prev_dims[H5S_MAX_RANK];    /* current dataspace dimensions */
    hsize_t cur_dims[H5S_MAX_RANK];    /* previous dataspace dimensions */
    herr_t ret_value = SUCCEED;    /* return value */

    HDfprintf(stdout, "Monitoring dataset %s...\n", dsetname);

    /* Open the dataset for minitoring */
    if((did = H5Dopen2(fid, dsetname, H5P_DEFAULT)) < 0) {
        error_msg("error in opening dataset \"%s\"\n", dsetname);
        ret_value = FAIL;
        goto done;
    }
    if((sid = H5Dget_space(did)) < 0) {
        error_msg("error in getting dataspace id for dataset \"%s\"\n", dsetname);
        ret_value = FAIL;
        goto done;
    }

    /* Get the dataset's dimension sizes */
    if((ndims = H5Sget_simple_extent_dims(sid, prev_dims, NULL)) < 0) {
        error_msg("unable to get dimensions sizes for \"%s\"\n", dsetname);
        ret_value = FAIL;
        goto done;
    }
    HDfflush(stdout);

    /* Loop until an error occurs or the user interrupts execution */
    while(!g_user_interrupt) {

        /* Refreshes the dataset */
        if(H5Drefresh(did) < 0) {
            ret_value = FAIL;
            goto done;
        }

        /* Get the dataset's current dimension sizes */
        if(H5LDget_dset_dims(did, cur_dims) < 0) {
            error_msg("unable to get dimension sizes for \"%s\"\n", dsetname);
            ret_value = FAIL;
            goto done;
        }

        /* Check the dimension sizes */
        for(i = 0; i < ndims; i++)
            if(cur_dims[i] != prev_dims[i])
                break;

        /* at least one dimension has changed */
        if(i != ndims) {
            /* Printing changes in dimension sizes */
            for(u = 0; u < ndims; u++) {
                HDfprintf(stdout, "dimension %d: %" PRIuHSIZE "->%" PRIuHSIZE "", u, prev_dims[u], cur_dims[u]);
                if(cur_dims[u] > prev_dims[u])
                    HDfprintf(stdout, " (increases)\n");
                else if(cur_dims[u] < prev_dims[u])
                    HDfprintf(stdout, " (decreases)\n");
                else
                    HDfprintf(stdout, " (unchanged)\n");
            }

            /* Printing elements appended to the dataset if there is */
            if(!g_monitor_size_only) {

                /* See if at least one dimension size has increased */
                for(u = 0; u < ndims; u++) {
                    int j;
                    hsize_t start[H5S_MAX_RANK];
                    hsize_t block[H5S_MAX_RANK];

                    /* Print the new appended data to the dataset */
                    if(cur_dims[u] > prev_dims[u]) {
                        HDfprintf(stdout, "    Data:\n");

                        for(j = 0; j < ndims; j++) {
                            start[j] = 0;
                            block[j] = 1;
                        }

                        if((ret_value = slicendump(did, prev_dims, cur_dims, start, block, ndims, ndims)) < 0)
                            goto done;
                        break;
                    }
                } /* end for */
            }
            HDfflush(stdout);
        }

        /* Save the current dimension sizes */
        HDmemcpy(prev_dims, cur_dims, (size_t)ndims * sizeof(hsize_t));

        /* Sleep before next monitor */
        HDsleep(g_polling_interval);
    } /* end while */

    HDfflush(stdout);

done:
    /* Closing */
    H5E_BEGIN_TRY
        H5Dclose(did);
    H5E_END_TRY

    return(ret_value);
} /* monitor_dataset() */

/*-------------------------------------------------------------------------
 * Function:  process_cmpd_fields
 *
 * Purpose: To check whether the fields selected in "g_list_of_fields"
 *          are valid fields associated with the dataset.
 *
 * Return: 0 on success; negative on failure
 *
 * Programmer:  Vailin Choi; August 2010
 *
 *-------------------------------------------------------------------------
 */
static herr_t
process_cmpd_fields(hid_t fid, char *dsetname)
{
    hid_t did=-1;               /* dataset id */
    hid_t dtid=-1, tid=-1;      /* dataset's data type id */
    size_t len;                 /* number of comma-separated fields in "g_list_of_fields" */
    herr_t ret_value = SUCCEED; /* Return value */

    HDassert(g_list_of_fields && *g_list_of_fields);

    /* Open the dataset */
    if((did = H5Dopen2(fid, dsetname, H5P_DEFAULT)) < 0) {
        error_msg("error in opening dataset \"%s\"\n", dsetname);
        ret_value = FAIL;
        goto done;
    }

    /* Get the dataset's datatype  */
    if(((dtid = H5Dget_type(did)) < 0) || (tid = H5Tget_native_type(dtid, H5T_DIR_DEFAULT)) < 0) {
        error_msg("error in getting dataset's datatype\n");
        ret_value = FAIL;
        goto done;
    }

    /* Check to make sure that the dataset's datatype is compound type */
    if(H5Tget_class(dtid) != H5T_COMPOUND) {
        error_msg("dataset should be compound type for <list_of_fields>\n");
        ret_value = FAIL;
        goto done;
    }

    /* Make a copy of "g_list_of_fields" */
    if((g_dup_fields = HDstrdup(g_list_of_fields)) == NULL) {
        error_msg("error in duplicating g_list_of_fields\n");
        ret_value = FAIL;
        goto done;
    }

    /* Estimate the number of comma-separated fields in "g_list of_fields" */
    len = HDstrlen(g_list_of_fields)/2 + 2;

    /* Allocate memory for a list vector of H5LD_memb_t structures to store "g_list_of_fields" info */
    if((g_listv = (H5LD_memb_t **)HDcalloc(len, sizeof(H5LD_memb_t *))) == NULL) {
        error_msg("error in allocating memory for H5LD_memb_t\n");
        ret_value = FAIL;
        goto done;
    }

    /* Process and store info for "g_listv" */
    if(H5LD_construct_vector(g_dup_fields, g_listv, tid) < 0) {
        error_msg("error in processing <list_of_fields>\n");
        ret_value = FAIL;
        goto done;
    }

    /* Will free memory for g_listv and g_dup_fields when exiting from h5watch */
done:
    /* Closing */
    H5E_BEGIN_TRY
        H5Tclose(dtid);
        H5Tclose(tid);
        H5Dclose(did);
    H5E_END_TRY
    return(ret_value);
} /* process_cmpd_fields() */


/*-------------------------------------------------------------------------
 * Function:    check_dataset
 *
 * Purpose:     To check whether a dataset can be monitored:
 *              A chunked dataset with unlimited or max. dimension setting
 *
 * Return:      Non-negative on success: dataset can be monitored
 *              Negative on failure: dataset cannot be monitored
 *
 * Programmer:  Vailin Choi; August 2010
 *
 *-------------------------------------------------------------------------
 */
static herr_t
check_dataset(hid_t fid, char *dsetname)
{
    hid_t did=-1;    /* Dataset id */
    hid_t dcp=-1;    /* Dataset creation property */
    hid_t sid=-1;    /* Dataset's dataspace id */
    int      ndims;    /* # of dimensions in the dataspace */
    unsigned u;        /* Local index variable */
    hsize_t cur_dims[H5S_MAX_RANK];    /* size of dataspace dimensions */
    hsize_t max_dims[H5S_MAX_RANK];    /* maximum size of dataspace dimensions */
    hbool_t unlim_max_dims = FALSE;    /* whether dataset has unlimited or max. dimension setting */
    void               *edata;
    H5E_auto2_t         func;
    H5D_layout_t        layout;
    herr_t ret_value = SUCCEED;    /* Return value */

    /* Disable error reporting */
    H5Eget_auto2(H5E_DEFAULT, &func, &edata);
    H5Eset_auto2(H5E_DEFAULT, NULL, NULL);

    /* Open the dataset */
    if((did = H5Dopen2(fid, dsetname, H5P_DEFAULT)) < 0) {
        error_msg("unable to open dataset \"%s\"\n", dsetname);
        ret_value = FAIL;
        goto done;
    }

    /* Get dataset's creation property list */
    if((dcp = H5Dget_create_plist(did)) < 0) {
        error_msg("unable to get dataset's creation property list \"%s\"\n", dsetname);
        ret_value = FAIL;
        goto done;
    }

    /* Query dataset's layout; the layout should be chunked or virtual */
    if((layout = H5Pget_layout(dcp)) < 0) {
        error_msg("unable to get dataset layout \"%s\"\n", dsetname);
        ret_value = FAIL;
        goto done;
    }
    if(layout != H5D_CHUNKED && layout != H5D_VIRTUAL) {
        error_msg("\"%s\" should be a chunked or virtual dataset\n", dsetname);
        ret_value = FAIL;
        goto done;
    }

    HDmemset(cur_dims, 0, sizeof cur_dims);
    HDmemset(max_dims, 0, sizeof max_dims);

    /* Get dataset's dataspace */
    if((sid = H5Dget_space(did)) < 0) {
        error_msg("can't get dataset's dataspace\"%s\"\n", dsetname);
        ret_value = FAIL;
        goto done;
    }

    /* Get dimension size of dataset's dataspace */
    if((ndims = H5Sget_simple_extent_dims(sid, cur_dims, max_dims)) < 0) {
        error_msg("can't get dataspace dimensions for dataset \"%s\"\n", dsetname);
        ret_value = FAIL;
        goto done;
    }

    /* Check whether dataset has unlimited dimension or max. dimension setting */
    for(u = 0; u < (unsigned)ndims; u++)
    if(max_dims[u] == H5S_UNLIMITED || cur_dims[u] != max_dims[u]) {
        unlim_max_dims = TRUE;
        break;
    }

    if(!unlim_max_dims) {
        error_msg("\"%s\" should have unlimited or max. dimension setting\n", dsetname);
        ret_value = FAIL;
    }

done:
    H5Eset_auto2(H5E_DEFAULT, func, edata);

    /* Closing */
    H5E_BEGIN_TRY
        H5Sclose(sid);
        H5Pclose(dcp);
        H5Dclose(did);
    H5E_END_TRY

    return(ret_value);
} /* check_dataset() */


/*-------------------------------------------------------------------------
 * Function:    leave
 *
 * Purpose:     Close the H5 Tools library and exit
 *
 * Return:      Does not return
 *
 * Programmer:  Vailin Choi; August 2010
 *
 *
 *-------------------------------------------------------------------------
 */
static void
leave(int ret)
{
    h5tools_close();

    exit(ret);
}


/*-------------------------------------------------------------------------
 * Function:    usage
 *
 * Purpose:     Print the usage message about h5watch (only long options)
 *
 * Return:      void
 *
 * Programmer:  Vailin Choi; August 2010
 *
 *-------------------------------------------------------------------------
 */
static void
usage(const char *prog)
{
    HDfflush(stdout);
    HDfprintf(stdout, "Usage: %s [OPTIONS] [OBJECT]\n", prog);
    HDfprintf(stdout, "\n");
    HDfprintf(stdout, "     OPTIONS\n");
    HDfprintf(stdout, "        --help            Print a usage message and exit.\n");
    HDfprintf(stdout, "        --version         Print version number and exit.\n");
    HDfprintf(stdout, "        --label           Label members of compound typed dataset.\n");
    HDfprintf(stdout, "        --simple          Use a machine-readable output format.\n");
    HDfprintf(stdout, "        --dim             Monitor changes in size of dataset dimensions only.\n");
    HDfprintf(stdout, "        --width=N         Set the number of columns to N for output.\n");
    HDfprintf(stdout, "                              A value of 0 sets the number of columns to the\n");
    HDfprintf(stdout, "                              maximum (65535). The default width is 80 columns.\n");
    HDfprintf(stdout, "        --polling=N       Set the polling interval to N (in seconds) when the\n");
    HDfprintf(stdout, "                              dataset will be checked for appended data.  The default\n");
    HDfprintf(stdout, "                              polling interval is 1.\n");
    HDfprintf(stdout, "        --fields=<list_of_fields>\n");
    HDfprintf(stdout, "                              Display data for the fields specified in <list_of_fields>\n");
    HDfprintf(stdout, "                              for a compound data type.  <list_of_fields> can be\n");
    HDfprintf(stdout, "                              specified as follows:\n");
    HDfprintf(stdout, "                                   1) A comma-separated list of field names in a\n");
    HDfprintf(stdout, "                                   compound data type.  \",\" is the separator\n");
    HDfprintf(stdout, "                                   for field names while \".\" is the separator\n");
    HDfprintf(stdout, "                                   for a nested field.\n");
    HDfprintf(stdout, "                                   2) A single field name in a compound data type.\n");
    HDfprintf(stdout, "                                   Can use this option multiple times.\n");
    HDfprintf(stdout, "                              Note that backslash is the escape character to avoid\n");
    HDfprintf(stdout, "                              characters in field names that conflict with the tool's\n");
    HDfprintf(stdout, "                              separators.\n");
    HDfprintf(stdout, "\n");
    HDfprintf(stdout, "     OBJECT is specified as [<filename>/<path_to_dataset>/<dsetname>]\n");
    HDfprintf(stdout, "        <filename>            Name of the HDF5 file.  It may be preceded by path\n");
    HDfprintf(stdout, "                              separated by slashes to the specified HDF5 file.\n");
    HDfprintf(stdout, "        <path_to_dataset>     Path separated by slashes to the specified dataset\n");
    HDfprintf(stdout, "        <dsetname>            Name of the dataset\n");
    HDfprintf(stdout, "\n");
    HDfprintf(stdout, "     User can end the h5watch process by ctrl-C (SIGINT) or kill the process (SIGTERM).\n");

} /* usage() */


/*-------------------------------------------------------------------------
 * Function:    parse_command_line
 *
 * Purpose:     Parse the command line for h5watch (take only long options)
 *
 * Return:      Success:    Set the corresponding command flags and return void
 *              Failure:    Exits program with EXIT_FAILURE value.
 *
 * Programmer:  Vailin Choi; August 2010
 *
 *-------------------------------------------------------------------------
 */
static void
parse_command_line(int argc, const char *argv[])
{
    int    opt;    /* Command line option */
    int tmp;

     /* no arguments */
    if (argc == 1) {
        usage(h5tools_getprogname());
        leave(EXIT_FAILURE);
    }

    /* parse command line options */
    while ((opt = get_option(argc, argv, s_opts, l_opts)) != EOF) {
        switch ((char)opt) {
        case '?':
        case 'h': /* --help */
            usage(h5tools_getprogname());
            leave(EXIT_SUCCESS);
            break;

        case 'V': /* --version */
            print_version(progname);
            leave(EXIT_SUCCESS);
            break;

        case 'w': /* --width=N */
            g_display_width = (int)HDstrtol(opt_arg, NULL, 0);
            if(g_display_width < 0) {
                usage(h5tools_getprogname());
                leave(EXIT_FAILURE);
            }
            break;

        case 'd': /* --dim */
            g_monitor_size_only = TRUE;
            break;

        case 'S': /* --simple */
            g_simple_output = TRUE;
            break;

        case 'l': /* --label */
            g_label = TRUE;
            break;

        case 'p': /* --polling=N */
            /* g_polling_interval = HDstrtod(opt_arg, NULL); */
            if((tmp = (int)HDstrtol(opt_arg, NULL, 10)) <= 0) {
                usage(h5tools_getprogname());
                leave(EXIT_FAILURE);
            }
            g_polling_interval = (unsigned)tmp;
            break;

        case 'f': /* --fields=<list_of_fields> */
            if(g_list_of_fields == NULL) {
                if((g_list_of_fields = HDstrdup(opt_arg)) == NULL) {
                    error_msg("memory allocation failed (file %s:line %d)\n",
                               __FILE__, __LINE__);
                    leave(EXIT_FAILURE);
                }
            } else {
                char *str;

                if((str = HDstrdup(opt_arg)) == NULL) {
                    error_msg("memory allocation failed (file %s:line %d)\n",
                               __FILE__, __LINE__);
                    leave(EXIT_FAILURE);
                }
                if((g_list_of_fields = (char *)HDrealloc(g_list_of_fields, HDstrlen(g_list_of_fields) + HDstrlen(str) + 2)) == NULL) {
                    error_msg("memory allocation failed (file %s:line %d)\n",
                               __FILE__, __LINE__);
                    leave(EXIT_FAILURE);

                }
                HDstrcat(g_list_of_fields, FIELD_SEP);
                HDstrcat(g_list_of_fields, str);
            }

            break;

        default:
            usage(h5tools_getprogname());
            leave(EXIT_FAILURE);
        }
    }


    /* check for object to be processed */
    if (argc <= opt_ind) {
        error_msg("missing dataset name\n");
        usage(h5tools_getprogname());
        leave(EXIT_FAILURE);
    }
} /* parse_command_line() */


/*-------------------------------------------------------------------------
 * Function:    catch_signal
 *
 * Purpose:     The signal handler to catch the signals:
 *              SIGTERM and SIGINT and set flag to get out of the main loop
 *
 * Return:      No return
 *
 * Programmer:  Vailin Choi; November 2014
 *
 *-------------------------------------------------------------------------
 */
static void catch_signal(int H5_ATTR_UNUSED signo)
{
    /* Set the flag to get out of the main loop */
    g_user_interrupt = TRUE;
} /* catch_signal() */


/*-------------------------------------------------------------------------
 * Function:    main
 *
 * Purpose:     h5watch
 *
 * Return:      Success:    0
 *              Failure:    1
 *
 * Programmer:  Vailin Choi; August 2010
 *
 *-------------------------------------------------------------------------
 */
int
main(int argc, const char *argv[])
{
    char        drivername[50];     /* VFD name */
    char        *fname = NULL;      /* File name */
    char        *dname = NULL;      /* Dataset name */
    void        *edata;             /* Error reporting */
    void        *tools_edata;       /* Error reporting */
    H5E_auto2_t func;               /* Error reporting */
    H5E_auto2_t tools_func;         /* Error reporting */
    char        *x;                 /* Temporary string pointer */
    hid_t       fid = -1;           /* File ID */
    hid_t       fapl = -1;          /* File access property list */

    /* Set up tool name and exit status */
    h5tools_setprogname(PROGRAMNAME);
    h5tools_setstatus(EXIT_SUCCESS);

    /* Disable error reporting */
    H5Eget_auto2(H5E_DEFAULT, &func, &edata);
    H5Eset_auto2(H5E_DEFAULT, NULL, NULL);

    /* Initialize h5tools lib */
    h5tools_init();

    /* Disable tools error reporting */
    H5Eget_auto2(H5tools_ERR_STACK_g, &tools_func, &tools_edata);
    H5Eset_auto2(H5tools_ERR_STACK_g, NULL, NULL);

    /* To exit from h5watch for SIGTERM signal */
    if(HDsignal(SIGTERM, catch_signal) == SIG_ERR) {
        error_msg("An error occurred while setting a signal handler.\n");
        leave(EXIT_FAILURE);
    }

    /* To exit from h5watch for SIGINT signal */
    if(HDsignal(SIGINT, catch_signal) == SIG_ERR) {
        error_msg("An error occurred while setting a signal handler.\n");
        leave(EXIT_FAILURE);
    }

    /* parse command line options */
    parse_command_line(argc, argv);

    if(argc <= opt_ind) {
        error_msg("missing dataset name\n");
        usage(h5tools_getprogname());
        leave(EXIT_FAILURE);
    }

    /* Mostly copied from tools/h5ls coding & modified accordingly */
    /*
     * [OBJECT] is specified as
     *        [<filename>/<path_to_dataset>/<dsetname>]
     *
     * Example: ../dir1/foo/bar/dset
     *          \_________/\______/
     *             file       obj
     *
     * The dichotomy is determined by calling H5Fopen() repeatedly until it
     * succeeds. The first call uses the entire name and each subsequent call
     * chops off the last component. If we reach the beginning of the name
     * then there must have been something wrong with the file (perhaps it
     * doesn't exist).
     */
    if((fname = HDstrdup(argv[opt_ind])) == NULL) {
        error_msg("memory allocation failed (file %s:line %d)\n",
                   __FILE__, __LINE__);
        h5tools_setstatus(EXIT_FAILURE);
    }

    /* Create a copy of file access property list */
    if((fapl = H5Pcreate(H5P_FILE_ACCESS)) < 0)
        return -1;

    /* Set to use the latest library format */
    if(H5Pset_libver_bounds(fapl, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0)
        return -1;

    do {
        while(fname && *fname) {
            fid = h5tools_fopen(fname, H5F_ACC_RDONLY|H5F_ACC_SWMR_READ, fapl, FALSE, drivername, sizeof drivername);

            if(fid >= 0) {
                HDfprintf(stdout, "Opened \"%s\" with %s driver.\n", fname, drivername);
                break; /*success*/
            } /* end if */

            /* Shorten the file name; lengthen the object name */
            x = dname;
            dname = HDstrrchr(fname, '/');
            if(x)
                *x = '/';
            if(!dname)
                break;
            *dname = '\0';
        } /* end while */
    /* Try opening the file again if somehow unstable */
    } while(g_retry-- > 0 && fid == FAIL);

    if(fid < 0) {
        error_msg("unable to open file \"%s\"\n", fname);
        if(fname) HDfree(fname);
        if(fapl >= 0) H5Pclose(fapl);
        leave(EXIT_FAILURE);
    }

    if(!dname) {
        error_msg("no dataset specified\n");
        h5tools_setstatus(EXIT_FAILURE);
    } else {
        *dname = '/';
        x = dname;
        if((dname = HDstrdup(dname)) == NULL) {
            error_msg("memory allocation failed (file %s:line %d)\n",
                       __FILE__, __LINE__);
            h5tools_setstatus(EXIT_FAILURE);
        } else {
            *x = '\0';
            /* Validate dataset */
            if(check_dataset(fid, dname) < 0)
                h5tools_setstatus(EXIT_FAILURE);
            /* Validate input "fields" */
            else if(g_list_of_fields && *g_list_of_fields)
                if(process_cmpd_fields(fid, dname) < 0)
                    h5tools_setstatus(EXIT_FAILURE);
        }
    }

    /* If everything is fine, start monitoring the datset */
    if(h5tools_getstatus() != EXIT_FAILURE)
        if(monitor_dataset(fid, dname) < 0)
            h5tools_setstatus(EXIT_FAILURE);

    /* Free spaces */
    if(fname) HDfree(fname);
    if(dname) HDfree(dname);
    if(g_list_of_fields) HDfree(g_list_of_fields);
    if(g_listv) {
        H5LD_clean_vector(g_listv);
        HDfree(g_listv);
    }
    if(g_dup_fields) HDfree(g_dup_fields);

    /* Close the file access property list */
    if(fapl >= 0 && H5Pclose(fapl) < 0) {
        error_msg("unable to close file access property list\n");
        h5tools_setstatus(EXIT_FAILURE);
    }

    /* Close the file */
    if(H5Fclose(fid) < 0) {
        error_msg("unable to close file\n");
        h5tools_setstatus(EXIT_FAILURE);
    }

    H5Eset_auto2(H5E_DEFAULT, func, edata);
    H5Eset_auto2(H5tools_ERR_STACK_g, tools_func, tools_edata);

    /* exit */
    leave(h5tools_getstatus());
} /* main() */