parallel-checkout: make it truly parallel
[git] / builtin / rev-list.c
1 #include "cache.h"
2 #include "config.h"
3 #include "commit.h"
4 #include "diff.h"
5 #include "revision.h"
6 #include "list-objects.h"
7 #include "list-objects-filter.h"
8 #include "list-objects-filter-options.h"
9 #include "object.h"
10 #include "object-store.h"
11 #include "pack.h"
12 #include "pack-bitmap.h"
13 #include "builtin.h"
14 #include "log-tree.h"
15 #include "graph.h"
16 #include "bisect.h"
17 #include "progress.h"
18 #include "reflog-walk.h"
19 #include "oidset.h"
20 #include "packfile.h"
21
22 static const char rev_list_usage[] =
23 "git rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
24 "  limiting output:\n"
25 "    --max-count=<n>\n"
26 "    --max-age=<epoch>\n"
27 "    --min-age=<epoch>\n"
28 "    --sparse\n"
29 "    --no-merges\n"
30 "    --min-parents=<n>\n"
31 "    --no-min-parents\n"
32 "    --max-parents=<n>\n"
33 "    --no-max-parents\n"
34 "    --remove-empty\n"
35 "    --all\n"
36 "    --branches\n"
37 "    --tags\n"
38 "    --remotes\n"
39 "    --stdin\n"
40 "    --quiet\n"
41 "  ordering output:\n"
42 "    --topo-order\n"
43 "    --date-order\n"
44 "    --reverse\n"
45 "  formatting output:\n"
46 "    --parents\n"
47 "    --children\n"
48 "    --objects | --objects-edge\n"
49 "    --unpacked\n"
50 "    --header | --pretty\n"
51 "    --[no-]object-names\n"
52 "    --abbrev=<n> | --no-abbrev\n"
53 "    --abbrev-commit\n"
54 "    --left-right\n"
55 "    --count\n"
56 "  special purpose:\n"
57 "    --bisect\n"
58 "    --bisect-vars\n"
59 "    --bisect-all"
60 ;
61
62 static struct progress *progress;
63 static unsigned progress_counter;
64
65 static struct list_objects_filter_options filter_options;
66 static struct oidset omitted_objects;
67 static int arg_print_omitted; /* print objects omitted by filter */
68
69 static struct oidset missing_objects;
70 enum missing_action {
71         MA_ERROR = 0,    /* fail if any missing objects are encountered */
72         MA_ALLOW_ANY,    /* silently allow ALL missing objects */
73         MA_PRINT,        /* print ALL missing objects in special section */
74         MA_ALLOW_PROMISOR, /* silently allow all missing PROMISOR objects */
75 };
76 static enum missing_action arg_missing_action;
77
78 /* display only the oid of each object encountered */
79 static int arg_show_object_names = 1;
80
81 #define DEFAULT_OIDSET_SIZE     (16*1024)
82
83 static int show_disk_usage;
84 static off_t total_disk_usage;
85
86 static off_t get_object_disk_usage(struct object *obj)
87 {
88         off_t size;
89         struct object_info oi = OBJECT_INFO_INIT;
90         oi.disk_sizep = &size;
91         if (oid_object_info_extended(the_repository, &obj->oid, &oi, 0) < 0)
92                 die(_("unable to get disk usage of %s"), oid_to_hex(&obj->oid));
93         return size;
94 }
95
96 static void finish_commit(struct commit *commit);
97 static void show_commit(struct commit *commit, void *data)
98 {
99         struct rev_list_info *info = data;
100         struct rev_info *revs = info->revs;
101
102         display_progress(progress, ++progress_counter);
103
104         if (show_disk_usage)
105                 total_disk_usage += get_object_disk_usage(&commit->object);
106
107         if (info->flags & REV_LIST_QUIET) {
108                 finish_commit(commit);
109                 return;
110         }
111
112         graph_show_commit(revs->graph);
113
114         if (revs->count) {
115                 if (commit->object.flags & PATCHSAME)
116                         revs->count_same++;
117                 else if (commit->object.flags & SYMMETRIC_LEFT)
118                         revs->count_left++;
119                 else
120                         revs->count_right++;
121                 finish_commit(commit);
122                 return;
123         }
124
125         if (info->show_timestamp)
126                 printf("%"PRItime" ", commit->date);
127         if (info->header_prefix)
128                 fputs(info->header_prefix, stdout);
129
130         if (!revs->graph)
131                 fputs(get_revision_mark(revs, commit), stdout);
132         if (revs->abbrev_commit && revs->abbrev)
133                 fputs(find_unique_abbrev(&commit->object.oid, revs->abbrev),
134                       stdout);
135         else
136                 fputs(oid_to_hex(&commit->object.oid), stdout);
137         if (revs->print_parents) {
138                 struct commit_list *parents = commit->parents;
139                 while (parents) {
140                         printf(" %s", oid_to_hex(&parents->item->object.oid));
141                         parents = parents->next;
142                 }
143         }
144         if (revs->children.name) {
145                 struct commit_list *children;
146
147                 children = lookup_decoration(&revs->children, &commit->object);
148                 while (children) {
149                         printf(" %s", oid_to_hex(&children->item->object.oid));
150                         children = children->next;
151                 }
152         }
153         show_decorations(revs, commit);
154         if (revs->commit_format == CMIT_FMT_ONELINE)
155                 putchar(' ');
156         else
157                 putchar('\n');
158
159         if (revs->verbose_header) {
160                 struct strbuf buf = STRBUF_INIT;
161                 struct pretty_print_context ctx = {0};
162                 ctx.abbrev = revs->abbrev;
163                 ctx.date_mode = revs->date_mode;
164                 ctx.date_mode_explicit = revs->date_mode_explicit;
165                 ctx.fmt = revs->commit_format;
166                 ctx.output_encoding = get_log_output_encoding();
167                 ctx.color = revs->diffopt.use_color;
168                 pretty_print_commit(&ctx, commit, &buf);
169                 if (buf.len) {
170                         if (revs->commit_format != CMIT_FMT_ONELINE)
171                                 graph_show_oneline(revs->graph);
172
173                         graph_show_commit_msg(revs->graph, stdout, &buf);
174
175                         /*
176                          * Add a newline after the commit message.
177                          *
178                          * Usually, this newline produces a blank
179                          * padding line between entries, in which case
180                          * we need to add graph padding on this line.
181                          *
182                          * However, the commit message may not end in a
183                          * newline.  In this case the newline simply
184                          * ends the last line of the commit message,
185                          * and we don't need any graph output.  (This
186                          * always happens with CMIT_FMT_ONELINE, and it
187                          * happens with CMIT_FMT_USERFORMAT when the
188                          * format doesn't explicitly end in a newline.)
189                          */
190                         if (buf.len && buf.buf[buf.len - 1] == '\n')
191                                 graph_show_padding(revs->graph);
192                         putchar(info->hdr_termination);
193                 } else {
194                         /*
195                          * If the message buffer is empty, just show
196                          * the rest of the graph output for this
197                          * commit.
198                          */
199                         if (graph_show_remainder(revs->graph))
200                                 putchar('\n');
201                         if (revs->commit_format == CMIT_FMT_ONELINE)
202                                 putchar('\n');
203                 }
204                 strbuf_release(&buf);
205         } else {
206                 if (graph_show_remainder(revs->graph))
207                         putchar('\n');
208         }
209         maybe_flush_or_die(stdout, "stdout");
210         finish_commit(commit);
211 }
212
213 static void finish_commit(struct commit *commit)
214 {
215         if (commit->parents) {
216                 free_commit_list(commit->parents);
217                 commit->parents = NULL;
218         }
219         free_commit_buffer(the_repository->parsed_objects,
220                            commit);
221 }
222
223 static inline void finish_object__ma(struct object *obj)
224 {
225         /*
226          * Whether or not we try to dynamically fetch missing objects
227          * from the server, we currently DO NOT have the object.  We
228          * can either print, allow (ignore), or conditionally allow
229          * (ignore) them.
230          */
231         switch (arg_missing_action) {
232         case MA_ERROR:
233                 die("missing %s object '%s'",
234                     type_name(obj->type), oid_to_hex(&obj->oid));
235                 return;
236
237         case MA_ALLOW_ANY:
238                 return;
239
240         case MA_PRINT:
241                 oidset_insert(&missing_objects, &obj->oid);
242                 return;
243
244         case MA_ALLOW_PROMISOR:
245                 if (is_promisor_object(&obj->oid))
246                         return;
247                 die("unexpected missing %s object '%s'",
248                     type_name(obj->type), oid_to_hex(&obj->oid));
249                 return;
250
251         default:
252                 BUG("unhandled missing_action");
253                 return;
254         }
255 }
256
257 static int finish_object(struct object *obj, const char *name, void *cb_data)
258 {
259         struct rev_list_info *info = cb_data;
260         if (oid_object_info_extended(the_repository, &obj->oid, NULL, 0) < 0) {
261                 finish_object__ma(obj);
262                 return 1;
263         }
264         if (info->revs->verify_objects && !obj->parsed && obj->type != OBJ_COMMIT)
265                 parse_object(the_repository, &obj->oid);
266         return 0;
267 }
268
269 static void show_object(struct object *obj, const char *name, void *cb_data)
270 {
271         struct rev_list_info *info = cb_data;
272         struct rev_info *revs = info->revs;
273
274         if (finish_object(obj, name, cb_data))
275                 return;
276         display_progress(progress, ++progress_counter);
277         if (show_disk_usage)
278                 total_disk_usage += get_object_disk_usage(obj);
279         if (info->flags & REV_LIST_QUIET)
280                 return;
281
282         if (revs->count) {
283                 /*
284                  * The object count is always accumulated in the .count_right
285                  * field for traversal that is not a left-right traversal,
286                  * and cmd_rev_list() made sure that a .count request that
287                  * wants to count non-commit objects, which is handled by
288                  * the show_object() callback, does not ask for .left_right.
289                  */
290                 revs->count_right++;
291                 return;
292         }
293
294         if (arg_show_object_names)
295                 show_object_with_name(stdout, obj, name);
296         else
297                 printf("%s\n", oid_to_hex(&obj->oid));
298 }
299
300 static void show_edge(struct commit *commit)
301 {
302         printf("-%s\n", oid_to_hex(&commit->object.oid));
303 }
304
305 static void print_var_str(const char *var, const char *val)
306 {
307         printf("%s='%s'\n", var, val);
308 }
309
310 static void print_var_int(const char *var, int val)
311 {
312         printf("%s=%d\n", var, val);
313 }
314
315 static int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
316 {
317         int cnt, flags = info->flags;
318         char hex[GIT_MAX_HEXSZ + 1] = "";
319         struct commit_list *tried;
320         struct rev_info *revs = info->revs;
321
322         if (!revs->commits)
323                 return 1;
324
325         revs->commits = filter_skipped(revs->commits, &tried,
326                                        flags & BISECT_SHOW_ALL,
327                                        NULL, NULL);
328
329         /*
330          * revs->commits can reach "reaches" commits among
331          * "all" commits.  If it is good, then there are
332          * (all-reaches) commits left to be bisected.
333          * On the other hand, if it is bad, then the set
334          * to bisect is "reaches".
335          * A bisect set of size N has (N-1) commits further
336          * to test, as we already know one bad one.
337          */
338         cnt = all - reaches;
339         if (cnt < reaches)
340                 cnt = reaches;
341
342         if (revs->commits)
343                 oid_to_hex_r(hex, &revs->commits->item->object.oid);
344
345         if (flags & BISECT_SHOW_ALL) {
346                 traverse_commit_list(revs, show_commit, show_object, info);
347                 printf("------\n");
348         }
349
350         print_var_str("bisect_rev", hex);
351         print_var_int("bisect_nr", cnt - 1);
352         print_var_int("bisect_good", all - reaches - 1);
353         print_var_int("bisect_bad", reaches - 1);
354         print_var_int("bisect_all", all);
355         print_var_int("bisect_steps", estimate_bisect_steps(all));
356
357         return 0;
358 }
359
360 static int show_object_fast(
361         const struct object_id *oid,
362         enum object_type type,
363         int exclude,
364         uint32_t name_hash,
365         struct packed_git *found_pack,
366         off_t found_offset)
367 {
368         fprintf(stdout, "%s\n", oid_to_hex(oid));
369         return 1;
370 }
371
372 static inline int parse_missing_action_value(const char *value)
373 {
374         if (!strcmp(value, "error")) {
375                 arg_missing_action = MA_ERROR;
376                 return 1;
377         }
378
379         if (!strcmp(value, "allow-any")) {
380                 arg_missing_action = MA_ALLOW_ANY;
381                 fetch_if_missing = 0;
382                 return 1;
383         }
384
385         if (!strcmp(value, "print")) {
386                 arg_missing_action = MA_PRINT;
387                 fetch_if_missing = 0;
388                 return 1;
389         }
390
391         if (!strcmp(value, "allow-promisor")) {
392                 arg_missing_action = MA_ALLOW_PROMISOR;
393                 fetch_if_missing = 0;
394                 return 1;
395         }
396
397         return 0;
398 }
399
400 static int try_bitmap_count(struct rev_info *revs,
401                             struct list_objects_filter_options *filter)
402 {
403         uint32_t commit_count = 0,
404                  tag_count = 0,
405                  tree_count = 0,
406                  blob_count = 0;
407         int max_count;
408         struct bitmap_index *bitmap_git;
409
410         /* This function only handles counting, not general traversal. */
411         if (!revs->count)
412                 return -1;
413
414         /*
415          * A bitmap result can't know left/right, etc, because we don't
416          * actually traverse.
417          */
418         if (revs->left_right || revs->cherry_mark)
419                 return -1;
420
421         /*
422          * If we're counting reachable objects, we can't handle a max count of
423          * commits to traverse, since we don't know which objects go with which
424          * commit.
425          */
426         if (revs->max_count >= 0 &&
427             (revs->tag_objects || revs->tree_objects || revs->blob_objects))
428                 return -1;
429
430         /*
431          * This must be saved before doing any walking, since the revision
432          * machinery will count it down to zero while traversing.
433          */
434         max_count = revs->max_count;
435
436         bitmap_git = prepare_bitmap_walk(revs, filter);
437         if (!bitmap_git)
438                 return -1;
439
440         count_bitmap_commit_list(bitmap_git, &commit_count,
441                                  revs->tree_objects ? &tree_count : NULL,
442                                  revs->blob_objects ? &blob_count : NULL,
443                                  revs->tag_objects ? &tag_count : NULL);
444         if (max_count >= 0 && max_count < commit_count)
445                 commit_count = max_count;
446
447         printf("%d\n", commit_count + tree_count + blob_count + tag_count);
448         free_bitmap_index(bitmap_git);
449         return 0;
450 }
451
452 static int try_bitmap_traversal(struct rev_info *revs,
453                                 struct list_objects_filter_options *filter)
454 {
455         struct bitmap_index *bitmap_git;
456
457         /*
458          * We can't use a bitmap result with a traversal limit, since the set
459          * of commits we'd get would be essentially random.
460          */
461         if (revs->max_count >= 0)
462                 return -1;
463
464         bitmap_git = prepare_bitmap_walk(revs, filter);
465         if (!bitmap_git)
466                 return -1;
467
468         traverse_bitmap_commit_list(bitmap_git, revs, &show_object_fast);
469         free_bitmap_index(bitmap_git);
470         return 0;
471 }
472
473 static int try_bitmap_disk_usage(struct rev_info *revs,
474                                  struct list_objects_filter_options *filter)
475 {
476         struct bitmap_index *bitmap_git;
477
478         if (!show_disk_usage)
479                 return -1;
480
481         bitmap_git = prepare_bitmap_walk(revs, filter);
482         if (!bitmap_git)
483                 return -1;
484
485         printf("%"PRIuMAX"\n",
486                (uintmax_t)get_disk_usage_from_bitmap(bitmap_git, revs));
487         return 0;
488 }
489
490 int cmd_rev_list(int argc, const char **argv, const char *prefix)
491 {
492         struct rev_info revs;
493         struct rev_list_info info;
494         struct setup_revision_opt s_r_opt = {
495                 .allow_exclude_promisor_objects = 1,
496         };
497         int i;
498         int bisect_list = 0;
499         int bisect_show_vars = 0;
500         int bisect_find_all = 0;
501         int use_bitmap_index = 0;
502         const char *show_progress = NULL;
503
504         if (argc == 2 && !strcmp(argv[1], "-h"))
505                 usage(rev_list_usage);
506
507         git_config(git_default_config, NULL);
508         repo_init_revisions(the_repository, &revs, prefix);
509         revs.abbrev = DEFAULT_ABBREV;
510         revs.commit_format = CMIT_FMT_UNSPECIFIED;
511
512         /*
513          * Scan the argument list before invoking setup_revisions(), so that we
514          * know if fetch_if_missing needs to be set to 0.
515          *
516          * "--exclude-promisor-objects" acts as a pre-filter on missing objects
517          * by not crossing the boundary from realized objects to promisor
518          * objects.
519          *
520          * Let "--missing" to conditionally set fetch_if_missing.
521          */
522         for (i = 1; i < argc; i++) {
523                 const char *arg = argv[i];
524                 if (!strcmp(arg, "--exclude-promisor-objects")) {
525                         fetch_if_missing = 0;
526                         revs.exclude_promisor_objects = 1;
527                         break;
528                 }
529         }
530         for (i = 1; i < argc; i++) {
531                 const char *arg = argv[i];
532                 if (skip_prefix(arg, "--missing=", &arg)) {
533                         if (revs.exclude_promisor_objects)
534                                 die(_("cannot combine --exclude-promisor-objects and --missing"));
535                         if (parse_missing_action_value(arg))
536                                 break;
537                 }
538         }
539
540         if (arg_missing_action)
541                 revs.do_not_die_on_missing_tree = 1;
542
543         argc = setup_revisions(argc, argv, &revs, &s_r_opt);
544
545         memset(&info, 0, sizeof(info));
546         info.revs = &revs;
547         if (revs.bisect)
548                 bisect_list = 1;
549
550         if (revs.diffopt.flags.quick)
551                 info.flags |= REV_LIST_QUIET;
552         for (i = 1 ; i < argc; i++) {
553                 const char *arg = argv[i];
554
555                 if (!strcmp(arg, "--header")) {
556                         revs.verbose_header = 1;
557                         continue;
558                 }
559                 if (!strcmp(arg, "--timestamp")) {
560                         info.show_timestamp = 1;
561                         continue;
562                 }
563                 if (!strcmp(arg, "--bisect")) {
564                         bisect_list = 1;
565                         continue;
566                 }
567                 if (!strcmp(arg, "--bisect-all")) {
568                         bisect_list = 1;
569                         bisect_find_all = 1;
570                         info.flags |= BISECT_SHOW_ALL;
571                         revs.show_decorations = 1;
572                         continue;
573                 }
574                 if (!strcmp(arg, "--bisect-vars")) {
575                         bisect_list = 1;
576                         bisect_show_vars = 1;
577                         continue;
578                 }
579                 if (!strcmp(arg, "--use-bitmap-index")) {
580                         use_bitmap_index = 1;
581                         continue;
582                 }
583                 if (!strcmp(arg, "--test-bitmap")) {
584                         test_bitmap_walk(&revs);
585                         return 0;
586                 }
587                 if (skip_prefix(arg, "--progress=", &arg)) {
588                         show_progress = arg;
589                         continue;
590                 }
591
592                 if (skip_prefix(arg, ("--" CL_ARG__FILTER "="), &arg)) {
593                         parse_list_objects_filter(&filter_options, arg);
594                         if (filter_options.choice && !revs.blob_objects)
595                                 die(_("object filtering requires --objects"));
596                         continue;
597                 }
598                 if (!strcmp(arg, ("--no-" CL_ARG__FILTER))) {
599                         list_objects_filter_set_no_filter(&filter_options);
600                         continue;
601                 }
602                 if (!strcmp(arg, "--filter-print-omitted")) {
603                         arg_print_omitted = 1;
604                         continue;
605                 }
606
607                 if (!strcmp(arg, "--exclude-promisor-objects"))
608                         continue; /* already handled above */
609                 if (skip_prefix(arg, "--missing=", &arg))
610                         continue; /* already handled above */
611
612                 if (!strcmp(arg, ("--no-object-names"))) {
613                         arg_show_object_names = 0;
614                         continue;
615                 }
616
617                 if (!strcmp(arg, ("--object-names"))) {
618                         arg_show_object_names = 1;
619                         continue;
620                 }
621
622                 if (!strcmp(arg, "--disk-usage")) {
623                         show_disk_usage = 1;
624                         info.flags |= REV_LIST_QUIET;
625                         continue;
626                 }
627
628                 usage(rev_list_usage);
629
630         }
631         if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
632                 /* The command line has a --pretty  */
633                 info.hdr_termination = '\n';
634                 if (revs.commit_format == CMIT_FMT_ONELINE)
635                         info.header_prefix = "";
636                 else
637                         info.header_prefix = "commit ";
638         }
639         else if (revs.verbose_header)
640                 /* Only --header was specified */
641                 revs.commit_format = CMIT_FMT_RAW;
642
643         if ((!revs.commits && reflog_walk_empty(revs.reflog_info) &&
644              (!(revs.tag_objects || revs.tree_objects || revs.blob_objects) &&
645               !revs.pending.nr) &&
646              !revs.rev_input_given && !revs.read_from_stdin) ||
647             revs.diff)
648                 usage(rev_list_usage);
649
650         if (revs.show_notes)
651                 die(_("rev-list does not support display of notes"));
652
653         if (revs.count &&
654             (revs.tag_objects || revs.tree_objects || revs.blob_objects) &&
655             (revs.left_right || revs.cherry_mark))
656                 die(_("marked counting is incompatible with --objects"));
657
658         save_commit_buffer = (revs.verbose_header ||
659                               revs.grep_filter.pattern_list ||
660                               revs.grep_filter.header_list);
661         if (bisect_list)
662                 revs.limited = 1;
663
664         if (show_progress)
665                 progress = start_delayed_progress(show_progress, 0);
666
667         if (use_bitmap_index) {
668                 if (!try_bitmap_count(&revs, &filter_options))
669                         return 0;
670                 if (!try_bitmap_disk_usage(&revs, &filter_options))
671                         return 0;
672                 if (!try_bitmap_traversal(&revs, &filter_options))
673                         return 0;
674         }
675
676         if (prepare_revision_walk(&revs))
677                 die("revision walk setup failed");
678         if (revs.tree_objects)
679                 mark_edges_uninteresting(&revs, show_edge, 0);
680
681         if (bisect_list) {
682                 int reaches, all;
683                 unsigned bisect_flags = 0;
684
685                 if (bisect_find_all)
686                         bisect_flags |= FIND_BISECTION_ALL;
687
688                 if (revs.first_parent_only)
689                         bisect_flags |= FIND_BISECTION_FIRST_PARENT_ONLY;
690
691                 find_bisection(&revs.commits, &reaches, &all, bisect_flags);
692
693                 if (bisect_show_vars)
694                         return show_bisect_vars(&info, reaches, all);
695         }
696
697         if (arg_print_omitted)
698                 oidset_init(&omitted_objects, DEFAULT_OIDSET_SIZE);
699         if (arg_missing_action == MA_PRINT)
700                 oidset_init(&missing_objects, DEFAULT_OIDSET_SIZE);
701
702         traverse_commit_list_filtered(
703                 &filter_options, &revs, show_commit, show_object, &info,
704                 (arg_print_omitted ? &omitted_objects : NULL));
705
706         if (arg_print_omitted) {
707                 struct oidset_iter iter;
708                 struct object_id *oid;
709                 oidset_iter_init(&omitted_objects, &iter);
710                 while ((oid = oidset_iter_next(&iter)))
711                         printf("~%s\n", oid_to_hex(oid));
712                 oidset_clear(&omitted_objects);
713         }
714         if (arg_missing_action == MA_PRINT) {
715                 struct oidset_iter iter;
716                 struct object_id *oid;
717                 oidset_iter_init(&missing_objects, &iter);
718                 while ((oid = oidset_iter_next(&iter)))
719                         printf("?%s\n", oid_to_hex(oid));
720                 oidset_clear(&missing_objects);
721         }
722
723         stop_progress(&progress);
724
725         if (revs.count) {
726                 if (revs.left_right && revs.cherry_mark)
727                         printf("%d\t%d\t%d\n", revs.count_left, revs.count_right, revs.count_same);
728                 else if (revs.left_right)
729                         printf("%d\t%d\n", revs.count_left, revs.count_right);
730                 else if (revs.cherry_mark)
731                         printf("%d\t%d\n", revs.count_left + revs.count_right, revs.count_same);
732                 else
733                         printf("%d\n", revs.count_left + revs.count_right);
734         }
735
736         if (show_disk_usage)
737                 printf("%"PRIuMAX"\n", (uintmax_t)total_disk_usage);
738
739         return 0;
740 }