File: lsmem.c

package info (click to toggle)
util-linux 2.34-0.1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye, sid
  • size: 46,508 kB
  • sloc: ansic: 129,594; sh: 15,590; yacc: 1,170; makefile: 397; xml: 369; python: 316; csh: 37; sed: 16; perl: 15
file content (746 lines) | stat: -rw-r--r-- 19,148 bytes parent folder | download
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
/*
 * lsmem - Show memory configuration
 *
 * Copyright IBM Corp. 2016
 * Copyright (C) 2016 Karel Zak <kzak@redhat.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
#include <c.h>
#include <nls.h>
#include <path.h>
#include <strutils.h>
#include <closestream.h>
#include <xalloc.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>
#include <fcntl.h>
#include <inttypes.h>
#include <assert.h>
#include <optutils.h>
#include <libsmartcols.h>

#define _PATH_SYS_MEMORY		"/sys/devices/system/memory"

#define MEMORY_STATE_ONLINE		0
#define MEMORY_STATE_OFFLINE		1
#define MEMORY_STATE_GOING_OFFLINE	2
#define MEMORY_STATE_UNKNOWN		3

enum zone_id {
	ZONE_DMA = 0,
	ZONE_DMA32,
	ZONE_NORMAL,
	ZONE_HIGHMEM,
	ZONE_MOVABLE,
	ZONE_DEVICE,
	ZONE_NONE,
	ZONE_UNKNOWN,
	MAX_NR_ZONES,
};

struct memory_block {
	uint64_t	index;
	uint64_t	count;
	int		state;
	int		node;
	int		nr_zones;
	int		zones[MAX_NR_ZONES];
	unsigned int	removable:1;
};

struct lsmem {
	struct path_cxt		*sysmem;		/* _PATH_SYS_MEMORY directory handler */
	struct dirent		**dirs;
	int			ndirs;
	struct memory_block	*blocks;
	int			nblocks;
	uint64_t		block_size;
	uint64_t		mem_online;
	uint64_t		mem_offline;

	struct libscols_table	*table;
	unsigned int		have_nodes : 1,
				raw : 1,
				export : 1,
				json : 1,
				noheadings : 1,
				summary : 1,
				list_all : 1,
				bytes : 1,
				want_summary : 1,
				want_table : 1,
				split_by_node : 1,
				split_by_state : 1,
				split_by_removable : 1,
				split_by_zones : 1,
				have_zones : 1;
};


enum {
	COL_RANGE,
	COL_SIZE,
	COL_STATE,
	COL_REMOVABLE,
	COL_BLOCK,
	COL_NODE,
	COL_ZONES,
};

static char *zone_names[] = {
	[ZONE_DMA]	= "DMA",
	[ZONE_DMA32]	= "DMA32",
	[ZONE_NORMAL]	= "Normal",
	[ZONE_HIGHMEM]	= "Highmem",
	[ZONE_MOVABLE]	= "Movable",
	[ZONE_DEVICE]	= "Device",
	[ZONE_NONE]	= "None",	/* block contains more than one zone, can't be offlined */
	[ZONE_UNKNOWN]	= "Unknown",
};

/* column names */
struct coldesc {
	const char	*name;		/* header */
	double		whint;		/* width hint (N < 1 is in percent of termwidth) */
	int		flags;		/* SCOLS_FL_* */
	const char      *help;
};

/* columns descriptions */
static struct coldesc coldescs[] = {
	[COL_RANGE]	= { "RANGE", 0, 0, N_("start and end address of the memory range")},
	[COL_SIZE]	= { "SIZE", 5, SCOLS_FL_RIGHT, N_("size of the memory range")},
	[COL_STATE]	= { "STATE", 0, SCOLS_FL_RIGHT, N_("online status of the memory range")},
	[COL_REMOVABLE]	= { "REMOVABLE", 0, SCOLS_FL_RIGHT, N_("memory is removable")},
	[COL_BLOCK]	= { "BLOCK", 0, SCOLS_FL_RIGHT, N_("memory block number or blocks range")},
	[COL_NODE]	= { "NODE", 0, SCOLS_FL_RIGHT, N_("numa node of memory")},
	[COL_ZONES]	= { "ZONES", 0, SCOLS_FL_RIGHT, N_("valid zones for the memory range")},
};

/* columns[] array specifies all currently wanted output column. The columns
 * are defined by coldescs[] array and you can specify (on command line) each
 * column twice. That's enough, dynamically allocated array of the columns is
 * unnecessary overkill and over-engineering in this case */
static int columns[ARRAY_SIZE(coldescs) * 2];
static size_t ncolumns;

static inline size_t err_columns_index(size_t arysz, size_t idx)
{
	if (idx >= arysz)
		errx(EXIT_FAILURE, _("too many columns specified, "
				     "the limit is %zu columns"),
				arysz - 1);
	return idx;
}

/*
 * name must be null-terminated
 */
static int zone_name_to_id(const char *name)
{
	size_t i;

	for (i = 0; i < ARRAY_SIZE(zone_names); i++) {
		if (!strcasecmp(name, zone_names[i]))
			return i;
	}
	return ZONE_UNKNOWN;
}

#define add_column(ary, n, id)	\
		((ary)[ err_columns_index(ARRAY_SIZE(ary), (n)) ] = (id))

static int column_name_to_id(const char *name, size_t namesz)
{
	size_t i;

	for (i = 0; i < ARRAY_SIZE(coldescs); i++) {
		const char *cn = coldescs[i].name;

		if (!strncasecmp(name, cn, namesz) && !*(cn + namesz))
			return i;
	}
	warnx(_("unknown column: %s"), name);
	return -1;
}

static inline int get_column_id(int num)
{
	assert(num >= 0);
	assert((size_t) num < ncolumns);
	assert(columns[num] < (int) ARRAY_SIZE(coldescs));

	return columns[num];
}

static inline struct coldesc *get_column_desc(int num)
{
	return &coldescs[ get_column_id(num) ];
}

static inline void reset_split_policy(struct lsmem *l, int enable)
{
	l->split_by_state = enable;
	l->split_by_node = enable;
	l->split_by_removable = enable;
	l->split_by_zones = enable;
}

static void set_split_policy(struct lsmem *l, int cols[], size_t ncols)
{
	size_t i;

	reset_split_policy(l, 0);

	for (i = 0; i < ncols; i++) {
		switch (cols[i]) {
		case COL_STATE:
			l->split_by_state = 1;
			break;
		case COL_NODE:
			l->split_by_node = 1;
			break;
		case COL_REMOVABLE:
			l->split_by_removable = 1;
			break;
		case COL_ZONES:
			l->split_by_zones = 1;
			break;
		default:
			break;
		}
	}
}

static void add_scols_line(struct lsmem *lsmem, struct memory_block *blk)
{
	size_t i;
	struct libscols_line *line;

	line = scols_table_new_line(lsmem->table, NULL);
	if (!line)
		err_oom();

	for (i = 0; i < ncolumns; i++) {
		char *str = NULL;

		switch (get_column_id(i)) {
		case COL_RANGE:
		{
			uint64_t start = blk->index * lsmem->block_size;
			uint64_t size = blk->count * lsmem->block_size;
			xasprintf(&str, "0x%016"PRIx64"-0x%016"PRIx64, start, start + size - 1);
			break;
		}
		case COL_SIZE:
			if (lsmem->bytes)
				xasprintf(&str, "%"PRId64, (uint64_t) blk->count * lsmem->block_size);
			else
				str = size_to_human_string(SIZE_SUFFIX_1LETTER,
						(uint64_t) blk->count * lsmem->block_size);
			break;
		case COL_STATE:
			str = xstrdup(
				blk->state == MEMORY_STATE_ONLINE ? _("online") :
				blk->state == MEMORY_STATE_OFFLINE ? _("offline") :
				blk->state == MEMORY_STATE_GOING_OFFLINE ? _("on->off") :
				"?");
			break;
		case COL_REMOVABLE:
			if (blk->state == MEMORY_STATE_ONLINE)
				str = xstrdup(blk->removable ? _("yes") : _("no"));
			break;
		case COL_BLOCK:
			if (blk->count == 1)
				xasprintf(&str, "%"PRId64, blk->index);
			else
				xasprintf(&str, "%"PRId64"-%"PRId64,
					 blk->index, blk->index + blk->count - 1);
			break;
		case COL_NODE:
			if (lsmem->have_nodes)
				xasprintf(&str, "%d", blk->node);
			break;
		case COL_ZONES:
			if (lsmem->have_zones) {
				char valid_zones[BUFSIZ];
				int j, zone_id;

				valid_zones[0] = '\0';
				for (j = 0; j < blk->nr_zones; j++) {
					zone_id = blk->zones[j];
					if (strlen(valid_zones) +
					    strlen(zone_names[zone_id]) > BUFSIZ - 2)
						break;
					strcat(valid_zones, zone_names[zone_id]);
					if (j + 1 < blk->nr_zones)
						strcat(valid_zones, "/");
				}
				str = xstrdup(valid_zones);
			}
			break;
		}

		if (str && scols_line_refer_data(line, i, str) != 0)
			err_oom();
	}
}

static void fill_scols_table(struct lsmem *lsmem)
{
	int i;

	for (i = 0; i < lsmem->nblocks; i++)
		add_scols_line(lsmem, &lsmem->blocks[i]);
}

static void print_summary(struct lsmem *lsmem)
{
	if (lsmem->bytes) {
		printf("%-23s %15"PRId64"\n",_("Memory block size:"), lsmem->block_size);
		printf("%-23s %15"PRId64"\n",_("Total online memory:"), lsmem->mem_online);
		printf("%-23s %15"PRId64"\n",_("Total offline memory:"), lsmem->mem_offline);
	} else {
		char *p;

		if ((p = size_to_human_string(SIZE_SUFFIX_1LETTER, lsmem->block_size)))
			printf("%-23s %5s\n",_("Memory block size:"), p);
		free(p);

		if ((p = size_to_human_string(SIZE_SUFFIX_1LETTER, lsmem->mem_online)))
			printf("%-23s %5s\n",_("Total online memory:"), p);
		free(p);

		if ((p = size_to_human_string(SIZE_SUFFIX_1LETTER, lsmem->mem_offline)))
			printf("%-23s %5s\n",_("Total offline memory:"), p);
		free(p);
	}
}

static int memory_block_get_node(struct lsmem *lsmem, char *name)
{
	struct dirent *de;
	DIR *dir;
	int node;

	dir = ul_path_opendir(lsmem->sysmem, name);
	if (!dir)
		err(EXIT_FAILURE, _("Failed to open %s"), name);

	node = -1;
	while ((de = readdir(dir)) != NULL) {
		if (strncmp("node", de->d_name, 4))
			continue;
		if (!isdigit_string(de->d_name + 4))
			continue;
		node = strtol(de->d_name + 4, NULL, 10);
		break;
	}
	closedir(dir);
	return node;
}

static void memory_block_read_attrs(struct lsmem *lsmem, char *name,
				    struct memory_block *blk)
{
	char *line = NULL;
	int i, x = 0;

	memset(blk, 0, sizeof(*blk));

	blk->count = 1;
	blk->state = MEMORY_STATE_UNKNOWN;
	blk->index = strtoumax(name + 6, NULL, 10); /* get <num> of "memory<num>" */

	if (ul_path_readf_s32(lsmem->sysmem, &x, "%s/removable", name) == 0)
		blk->removable = x == 1;

	if (ul_path_readf_string(lsmem->sysmem, &line, "%s/state", name) > 0) {
		if (strcmp(line, "offline") == 0)
			blk->state = MEMORY_STATE_OFFLINE;
		else if (strcmp(line, "online") == 0)
			blk->state = MEMORY_STATE_ONLINE;
		else if (strcmp(line, "going-offline") == 0)
			blk->state = MEMORY_STATE_GOING_OFFLINE;
		free(line);
	}

	if (lsmem->have_nodes)
		blk->node = memory_block_get_node(lsmem, name);

	blk->nr_zones = 0;
	if (lsmem->have_zones &&
	    ul_path_readf_string(lsmem->sysmem, &line, "%s/valid_zones", name) > 0) {

		char *token = strtok(line, " ");

		for (i = 0; token && i < MAX_NR_ZONES; i++) {
			blk->zones[i] = zone_name_to_id(token);
			blk->nr_zones++;
			token = strtok(NULL, " ");
		}

		free(line);
	}
}

static int is_mergeable(struct lsmem *lsmem, struct memory_block *blk)
{
	struct memory_block *curr;
	int i;

	if (!lsmem->nblocks)
		return 0;
	curr = &lsmem->blocks[lsmem->nblocks - 1];
	if (lsmem->list_all)
		return 0;
	if (curr->index + curr->count != blk->index)
		return 0;
	if (lsmem->split_by_state && curr->state != blk->state)
		return 0;
	if (lsmem->split_by_removable && curr->removable != blk->removable)
		return 0;
	if (lsmem->split_by_node && lsmem->have_nodes) {
		if (curr->node != blk->node)
			return 0;
	}
	if (lsmem->split_by_zones && lsmem->have_zones) {
		if (curr->nr_zones != blk->nr_zones)
			return 0;
		for (i = 0; i < curr->nr_zones; i++) {
			if (curr->zones[i] == ZONE_UNKNOWN ||
			    curr->zones[i] != blk->zones[i])
				return 0;
		}
	}
	return 1;
}

static void read_info(struct lsmem *lsmem)
{
	struct memory_block blk;
	char buf[128];
	int i;

	if (ul_path_read_buffer(lsmem->sysmem, buf, sizeof(buf), "block_size_bytes") <= 0)
		err(EXIT_FAILURE, _("failed to read memory block size"));
	lsmem->block_size = strtoumax(buf, NULL, 16);

	for (i = 0; i < lsmem->ndirs; i++) {
		memory_block_read_attrs(lsmem, lsmem->dirs[i]->d_name, &blk);
		if (blk.state == MEMORY_STATE_ONLINE)
			lsmem->mem_online += lsmem->block_size;
		else
			lsmem->mem_offline += lsmem->block_size;
		if (is_mergeable(lsmem, &blk)) {
			lsmem->blocks[lsmem->nblocks - 1].count++;
			continue;
		}
		lsmem->nblocks++;
		lsmem->blocks = xrealloc(lsmem->blocks, lsmem->nblocks * sizeof(blk));
		*&lsmem->blocks[lsmem->nblocks - 1] = blk;
	}
}

static int memory_block_filter(const struct dirent *de)
{
	if (strncmp("memory", de->d_name, 6))
		return 0;
	return isdigit_string(de->d_name + 6);
}

static void read_basic_info(struct lsmem *lsmem)
{
	char dir[PATH_MAX];

	if (ul_path_access(lsmem->sysmem, F_OK, "block_size_bytes") != 0)
		errx(EXIT_FAILURE, _("This system does not support memory blocks"));

	ul_path_get_abspath(lsmem->sysmem, dir, sizeof(dir), NULL);

	lsmem->ndirs = scandir(dir, &lsmem->dirs, memory_block_filter, versionsort);
	if (lsmem->ndirs <= 0)
		err(EXIT_FAILURE, _("Failed to read %s"), dir);

	if (memory_block_get_node(lsmem, lsmem->dirs[0]->d_name) != -1)
		lsmem->have_nodes = 1;

	/* The valid_zones sysmem attribute was introduced with kernel 3.18 */
	if (ul_path_access(lsmem->sysmem, F_OK, "memory0/valid_zones") == 0)
		lsmem->have_zones = 1;
}

static void __attribute__((__noreturn__)) usage(void)
{
	FILE *out = stdout;
	size_t i;

	fputs(USAGE_HEADER, out);
	fprintf(out, _(" %s [options]\n"), program_invocation_short_name);

	fputs(USAGE_SEPARATOR, out);
	fputs(_("List the ranges of available memory with their online status.\n"), out);

	fputs(USAGE_OPTIONS, out);
	fputs(_(" -J, --json           use JSON output format\n"), out);
	fputs(_(" -P, --pairs          use key=\"value\" output format\n"), out);
	fputs(_(" -a, --all            list each individual memory block\n"), out);
	fputs(_(" -b, --bytes          print SIZE in bytes rather than in human readable format\n"), out);
	fputs(_(" -n, --noheadings     don't print headings\n"), out);
	fputs(_(" -o, --output <list>  output columns\n"), out);
	fputs(_("     --output-all     output all columns\n"), out);
	fputs(_(" -r, --raw            use raw output format\n"), out);
	fputs(_(" -S, --split <list>   split ranges by specified columns\n"), out);
	fputs(_(" -s, --sysroot <dir>  use the specified directory as system root\n"), out);
	fputs(_("     --summary[=when] print summary information (never,always or only)\n"), out);

	fputs(USAGE_SEPARATOR, out);
	printf(USAGE_HELP_OPTIONS(22));

	fputs(USAGE_COLUMNS, out);
	for (i = 0; i < ARRAY_SIZE(coldescs); i++)
		fprintf(out, " %10s  %s\n", coldescs[i].name, _(coldescs[i].help));

	printf(USAGE_MAN_TAIL("lsmem(1)"));

	exit(EXIT_SUCCESS);
}

int main(int argc, char **argv)
{
	struct lsmem _lsmem = {
			.want_table = 1,
			.want_summary = 1
		}, *lsmem = &_lsmem;

	const char *outarg = NULL, *splitarg = NULL, *prefix = NULL;
	int c;
	size_t i;

	enum {
		LSMEM_OPT_SUMARRY = CHAR_MAX + 1,
		OPT_OUTPUT_ALL
	};

	static const struct option longopts[] = {
		{"all",		no_argument,		NULL, 'a'},
		{"bytes",	no_argument,		NULL, 'b'},
		{"help",	no_argument,		NULL, 'h'},
		{"json",	no_argument,		NULL, 'J'},
		{"noheadings",	no_argument,		NULL, 'n'},
		{"output",	required_argument,	NULL, 'o'},
		{"output-all",	no_argument,		NULL, OPT_OUTPUT_ALL},
		{"pairs",	no_argument,		NULL, 'P'},
		{"raw",		no_argument,		NULL, 'r'},
		{"sysroot",	required_argument,	NULL, 's'},
		{"split",       required_argument,      NULL, 'S'},
		{"version",	no_argument,		NULL, 'V'},
		{"summary",     optional_argument,	NULL, LSMEM_OPT_SUMARRY },
		{NULL,		0,			NULL, 0}
	};
	static const ul_excl_t excl[] = {	/* rows and cols in ASCII order */
		{ 'J', 'P', 'r' },
		{ 'S', 'a' },
		{ 0 }
	};
	int excl_st[ARRAY_SIZE(excl)] = UL_EXCL_STATUS_INIT;

	setlocale(LC_ALL, "");
	bindtextdomain(PACKAGE, LOCALEDIR);
	textdomain(PACKAGE);
	close_stdout_atexit();

	while ((c = getopt_long(argc, argv, "abhJno:PrS:s:V", longopts, NULL)) != -1) {

		err_exclusive_options(c, longopts, excl, excl_st);

		switch (c) {
		case 'a':
			lsmem->list_all = 1;
			break;
		case 'b':
			lsmem->bytes = 1;
			break;
		case 'J':
			lsmem->json = 1;
			lsmem->want_summary = 0;
			break;
		case 'n':
			lsmem->noheadings = 1;
			break;
		case 'o':
			outarg = optarg;
			break;
		case OPT_OUTPUT_ALL:
			for (ncolumns = 0; (size_t)ncolumns < ARRAY_SIZE(coldescs); ncolumns++)
				columns[ncolumns] = ncolumns;
			break;
		case 'P':
			lsmem->export = 1;
			lsmem->want_summary = 0;
			break;
		case 'r':
			lsmem->raw = 1;
			lsmem->want_summary = 0;
			break;
		case 's':
			prefix = optarg;
			break;
		case 'S':
			splitarg = optarg;
			break;
		case LSMEM_OPT_SUMARRY:
			if (optarg) {
				if (strcmp(optarg, "never") == 0)
					lsmem->want_summary = 0;
				else if (strcmp(optarg, "only") == 0)
					lsmem->want_table = 0;
				else if (strcmp(optarg, "always") == 0)
					lsmem->want_summary = 1;
				else
					errx(EXIT_FAILURE, _("unsupported --summary argument"));
			} else
				lsmem->want_table = 0;
			break;

		case 'h':
			usage();
		case 'V':
			print_version(EXIT_SUCCESS);
		default:
			errtryhelp(EXIT_FAILURE);
		}
	}

	if (argc != optind) {
		warnx(_("bad usage"));
		errtryhelp(EXIT_FAILURE);
	}

	if (lsmem->want_table + lsmem->want_summary == 0)
		errx(EXIT_FAILURE, _("options --{raw,json,pairs} and --summary=only are mutually exclusive"));

	ul_path_init_debug();

	lsmem->sysmem = ul_new_path(_PATH_SYS_MEMORY);
	if (!lsmem->sysmem)
		err(EXIT_FAILURE, _("failed to initialize %s handler"), _PATH_SYS_MEMORY);
	if (prefix && ul_path_set_prefix(lsmem->sysmem, prefix) != 0)
		err(EXIT_FAILURE, _("invalid argument to --sysroot"));

	/* Shortcut to avoid scols machinery on --summary=only */
	if (lsmem->want_table == 0 && lsmem->want_summary) {
		read_basic_info(lsmem);
		read_info(lsmem);
		print_summary(lsmem);
		return EXIT_SUCCESS;
	}

	/*
	 * Default columns
	 */
	if (!ncolumns) {
		add_column(columns, ncolumns++, COL_RANGE);
		add_column(columns, ncolumns++, COL_SIZE);
		add_column(columns, ncolumns++, COL_STATE);
		add_column(columns, ncolumns++, COL_REMOVABLE);
		add_column(columns, ncolumns++, COL_BLOCK);
	}

	if (outarg && string_add_to_idarray(outarg, columns, ARRAY_SIZE(columns),
					 &ncolumns, column_name_to_id) < 0)
		return EXIT_FAILURE;

	/*
	 * Initialize output
	 */
	scols_init_debug(0);

	if (!(lsmem->table = scols_new_table()))
		errx(EXIT_FAILURE, _("failed to initialize output table"));
	scols_table_enable_raw(lsmem->table, lsmem->raw);
	scols_table_enable_export(lsmem->table, lsmem->export);
	scols_table_enable_json(lsmem->table, lsmem->json);
	scols_table_enable_noheadings(lsmem->table, lsmem->noheadings);

	if (lsmem->json)
		scols_table_set_name(lsmem->table, "memory");

	for (i = 0; i < ncolumns; i++) {
		struct coldesc *ci = get_column_desc(i);
		struct libscols_column *cl;

		cl = scols_table_new_column(lsmem->table, ci->name, ci->whint, ci->flags);
		if (!cl)
			err(EXIT_FAILURE, _("Failed to initialize output column"));

		if (lsmem->json) {
			int id = get_column_id(i);

			switch (id) {
			case COL_SIZE:
				if (!lsmem->bytes)
					break;
				/* fallthrough */
			case COL_NODE:
				scols_column_set_json_type(cl, SCOLS_JSON_NUMBER);
				break;
			case COL_REMOVABLE:
				scols_column_set_json_type(cl, SCOLS_JSON_BOOLEAN);
				break;
			}
		}
	}

	if (splitarg) {
		int split[ARRAY_SIZE(coldescs)] = { 0 };
		static size_t nsplits = 0;

		if (strcasecmp(splitarg, "none") == 0)
			;
		else if (string_add_to_idarray(splitarg, split, ARRAY_SIZE(split),
					&nsplits, column_name_to_id) < 0)
			return EXIT_FAILURE;

		set_split_policy(lsmem, split, nsplits);

	} else
		/* follow output columns */
		set_split_policy(lsmem, columns, ncolumns);

	/*
	 * Read data and print output
	 */
	read_basic_info(lsmem);
	read_info(lsmem);

	if (lsmem->want_table) {
		fill_scols_table(lsmem);
		scols_print_table(lsmem->table);

		if (lsmem->want_summary)
			fputc('\n', stdout);
	}

	if (lsmem->want_summary)
		print_summary(lsmem);

	scols_unref_table(lsmem->table);
	ul_unref_path(lsmem->sysmem);
	return 0;
}