[mirror_iproute2.git] / misc / lnstat.c

/* lnstat - Unified linux network statistics
 *
 * Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org>
 *
 * Development of this code was funded by Astaro AG, http://www.astaro.com/
 *
 * Based on original concept and ideas from predecessor rtstat.c:
 *
 * Copyright 2001 by Robert Olsson <robert.olsson@its.uu.se>
 *                                 Uppsala University, Sweden
 *
 * 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.
 *
 */

/* Maximum number of fields that can be displayed */
#define MAX_FIELDS		128

/* Maximum number of header lines */
#define HDR_LINES		10

/* default field width if none specified */
#define FIELD_WIDTH_DEFAULT	8
#define FIELD_WIDTH_MAX		20

#define DEFAULT_INTERVAL	2

#define HDR_LINE_LENGTH		(MAX_FIELDS*FIELD_WIDTH_MAX)

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>

#include <json_writer.h>
#include "lnstat.h"
#include "version.h"

static struct option opts[] = {
	{ "version", 0, NULL, 'V' },
	{ "count", 1, NULL, 'c' },
	{ "dump", 0, NULL, 'd' },
	{ "json", 0, NULL, 'j' },
	{ "file", 1, NULL, 'f' },
	{ "help", 0, NULL, 'h' },
	{ "interval", 1, NULL, 'i' },
	{ "keys", 1, NULL, 'k' },
	{ "subject", 1, NULL, 's' },
	{ "width", 1, NULL, 'w' },
	{ "oneline", 0, NULL, 0 },
};

static int usage(char *name, int exit_code)
{
	fprintf(stderr,
		"%s Version %s\n"
		"Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org>\n"
		"This program is free software licensed under GNU GPLv2\nwith ABSOLUTELY NO WARRANTY.\n"
		"\n"
		"Parameters:\n"
		"	-V --version		Print Version of Program\n"
		"	-c --count <count>	"
		"Print <count> number of intervals\n"
		"	-d --dump		"
		"Dump list of available files/keys\n"
		"	-j --json		"
		"Display in JSON format\n"
		"	-f --file <file>	Statistics file to use\n"
		"	-h --help		This help message\n"
		"	-i --interval <intv>	"
		"Set interval to 'intv' seconds\n"
		"	-k --keys k,k,k,...	Display only keys specified\n"
		"	-s --subject [0-2]	Control header printing:\n"
		"				0 = never\n"
		"				1 = once\n"
		"				2 = every 20 lines (default))\n"
		"	-w --width n,n,n,...	Width for each field\n"
		"\n",
		name, version);

	exit(exit_code);
}

struct field_param {
	const char *name;
	struct lnstat_field *lf;
	struct {
		unsigned int width;
	} print;
};

struct field_params {
	unsigned int num;
	struct field_param params[MAX_FIELDS];
};

static void print_line(FILE *of, const struct lnstat_file *lnstat_files,
		       const struct field_params *fp)
{
	int i;

	for (i = 0; i < fp->num; i++) {
		const struct lnstat_field *lf = fp->params[i].lf;

		fprintf(of, "%*lu|", fp->params[i].print.width, lf->result);
	}
	fputc('\n', of);
}

static void print_json(FILE *of, const struct lnstat_file *lnstat_files,
		       const struct field_params *fp)
{
	json_writer_t *jw = jsonw_new(of);
	int i;

	jsonw_start_object(jw);
	for (i = 0; i < fp->num; i++) {
		const struct lnstat_field *lf = fp->params[i].lf;

		jsonw_uint_field(jw, lf->name, lf->result);
	}
	jsonw_end_object(jw);
	jsonw_destroy(&jw);
}

/* find lnstat_field according to user specification */
static int map_field_params(struct lnstat_file *lnstat_files,
			    struct field_params *fps, int interval)
{
	int i, j = 0;
	struct lnstat_file *lf;

	/* no field specification on commandline, need to build default */
	if (!fps->num) {
		for (lf = lnstat_files; lf; lf = lf->next) {
			for (i = 0; i < lf->num_fields; i++) {
				fps->params[j].lf = &lf->fields[i];
				fps->params[j].lf->file->interval.tv_sec =
								interval;
				if (!fps->params[j].print.width)
					fps->params[j].print.width =
							FIELD_WIDTH_DEFAULT;

				if (++j >= MAX_FIELDS - 1) {
					fprintf(stderr,
						"WARN: MAX_FIELDS (%d) reached, truncating number of keys\n",
						MAX_FIELDS);
					goto full;
				}
			}
		}
full:
		fps->num = j;
		return 1;
	}

	for (i = 0; i < fps->num; i++) {
		fps->params[i].lf = lnstat_find_field(lnstat_files,
						      fps->params[i].name);
		if (!fps->params[i].lf) {
			fprintf(stderr, "Field `%s' unknown\n",
				fps->params[i].name);
			return 0;
		}
		fps->params[i].lf->file->interval.tv_sec = interval;
		if (!fps->params[i].print.width)
			fps->params[i].print.width = FIELD_WIDTH_DEFAULT;
	}
	return 1;
}

struct table_hdr {
	int num_lines;
	char *hdr[HDR_LINES];
};

static struct table_hdr *build_hdr_string(struct lnstat_file *lnstat_files,
					  struct field_params *fps,
					  int linewidth)
{
	int h, i;
	static struct table_hdr th;
	int ofs = 0;

	for (i = 0; i < HDR_LINES; i++)
		th.hdr[i] = calloc(1, HDR_LINE_LENGTH);

	for (i = 0; i < fps->num; i++) {
		char *cname, *fname = fps->params[i].lf->name;
		unsigned int width = fps->params[i].print.width;

		snprintf(th.hdr[0]+ofs, width+2, "%*.*s|", width, width,
			 fps->params[i].lf->file->basename);

		cname = fname;
		for (h = 1; h < HDR_LINES; h++) {
			if (cname - fname >= strlen(fname))
				snprintf(th.hdr[h]+ofs, width+2,
					 "%*.*s|", width, width, "");
			else {
				th.num_lines = h+1;
				snprintf(th.hdr[h]+ofs, width+2,
					 "%*.*s|", width, width, cname);
			}
			cname += width;
		}
		ofs += width+1;
	}
	/* fill in spaces */
	for (h = 1; h <= th.num_lines; h++) {
		for (i = 0; i < ofs; i++) {
			if (th.hdr[h][i] == '\0')
				th.hdr[h][i] = ' ';
		}
	}

	return &th;
}

static int print_hdr(FILE *of, struct table_hdr *th)
{
	int i;

	for (i = 0; i < th->num_lines; i++) {
		fputs(th->hdr[i], of);
		fputc('\n', of);
	}
	return 0;
}


int main(int argc, char **argv)
{
	struct lnstat_file *lnstat_files;
	const char *basename;
	int i, c;
	int interval = DEFAULT_INTERVAL;
	int hdr = 2;
	enum {
		MODE_DUMP,
		MODE_JSON,
		MODE_NORMAL,
	} mode = MODE_NORMAL;
	unsigned long count = 0;
	struct table_hdr *header;
	static struct field_params fp;
	int num_req_files = 0;
	char *req_files[LNSTAT_MAX_FILES];

	/* backwards compatibility mode for old tools */
	basename = strrchr(argv[0], '/');
	if (basename)
		basename += 1;	  /* name after slash */
	else
		basename = argv[0]; /* no slash */

	if (!strcmp(basename, "rtstat")) {
		/* rtstat compatibility mode */
		req_files[0] = "rt_cache";
		num_req_files = 1;
	} else if (!strcmp(basename, "ctstat")) {
		/* ctstat compatibility mode */
		req_files[0] = "ip_conntrack";
		num_req_files = 1;
	}

	while ((c = getopt_long(argc, argv, "Vc:djpf:h?i:k:s:w:",
				opts, NULL)) != -1) {
		int len = 0;
		char *tmp, *tok;

		switch (c) {
		case 'c':
			count = strtoul(optarg, NULL, 0);
			break;
		case 'd':
			mode = MODE_DUMP;
			break;
		case 'j':
			mode = MODE_JSON;
			break;
		case 'f':
			req_files[num_req_files++] = strdup(optarg);
			break;
		case '?':
		case 'h':
			usage(argv[0], 0);
			break;
		case 'i':
			sscanf(optarg, "%u", &interval);
			break;
		case 'k':
			tmp = strdup(optarg);
			if (!tmp)
				break;
			for (tok = strtok(tmp, ",");
			     tok;
			     tok = strtok(NULL, ",")) {
				if (fp.num >= MAX_FIELDS) {
					fprintf(stderr,
						"WARN: too many keys requested: (%d max)\n",
						MAX_FIELDS);
					break;
				}
				fp.params[fp.num++].name = tok;
			}
			break;
		case 's':
			sscanf(optarg, "%u", &hdr);
			break;
		case 'w':
			tmp = strdup(optarg);
			if (!tmp)
				break;
			i = 0;
			for (tok = strtok(tmp, ",");
			     tok;
			     tok = strtok(NULL, ",")) {
				len  = strtoul(tok, NULL, 0);
				if (len > FIELD_WIDTH_MAX)
					len = FIELD_WIDTH_MAX;
				fp.params[i].print.width = len;
				i++;
			}
			if (i == 1) {
				for (i = 0; i < MAX_FIELDS; i++)
					fp.params[i].print.width = len;
			}
			break;
		default:
			usage(argv[0], 1);
			break;
		}
	}

	lnstat_files = lnstat_scan_dir(PROC_NET_STAT, num_req_files,
				       (const char **) req_files);

	switch (mode) {
	case MODE_DUMP:
		lnstat_dump(stdout, lnstat_files);
		break;

	case MODE_NORMAL:
	case MODE_JSON:
		if (!map_field_params(lnstat_files, &fp, interval))
			exit(1);

		header = build_hdr_string(lnstat_files, &fp, 80);
		if (!header)
			exit(1);

		if (interval < 1)
			interval = 1;

		for (i = 0; i < count || !count; i++) {
			lnstat_update(lnstat_files);
			if (mode == MODE_JSON)
				print_json(stdout, lnstat_files, &fp);
			else {
				if  ((hdr > 1 && !(i % 20)) ||
				     (hdr == 1 && i == 0))
					print_hdr(stdout, header);
				print_line(stdout, lnstat_files, &fp);
			}
			fflush(stdout);
			if (i < count - 1 || !count)
				sleep(interval);
		}
		break;
	}

	return 1;
}
Commit	Line	Data
0bb187ca SH	1	/* lnstat - Unified linux network statistics
	2	*
	3	* Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org>
	4	*
	5	* Development of this code was funded by Astaro AG, http://www.astaro.com/
	6	*
	7	* Based on original concept and ideas from predecessor rtstat.c:
	8	*
	9	* Copyright 2001 by Robert Olsson <robert.olsson@its.uu.se>
	10	* Uppsala University, Sweden
	11	*
	12	* This program is free software; you can redistribute it and/or modify
	13	* it under the terms of the GNU General Public License as published by
	14	* the Free Software Foundation; either version 2 of the License, or
	15	* (at your option) any later version.
	16	*
	17	*/
	18
	19	/* Maximum number of fields that can be displayed */
f493dc30	20	#define MAX_FIELDS 128
0bb187ca SH	21
0bb187ca SH	22	/* Maximum number of header lines */
3d0b7439	23	#define HDR_LINES 10
0bb187ca SH	24
	25	/* default field width if none specified */
	26	#define FIELD_WIDTH_DEFAULT 8
	27	#define FIELD_WIDTH_MAX 20
	28
	29	#define DEFAULT_INTERVAL 2
	30
	31	#define HDR_LINE_LENGTH (MAX_FIELDS*FIELD_WIDTH_MAX)
	32
	33	#include <unistd.h>
	34	#include <stdio.h>
	35	#include <stdlib.h>
	36	#include <string.h>
	37	#include <getopt.h>
	38
fcc16c22	39	#include <json_writer.h>
0bb187ca	40	#include "lnstat.h"
d530608d	41	#include "version.h"
0bb187ca SH	42
	43	static struct option opts[] = {
	44	{ "version", 0, NULL, 'V' },
	45	{ "count", 1, NULL, 'c' },
a4f9e8df SH	46	{ "dump", 0, NULL, 'd' },
a4f9e8df SH	47	{ "json", 0, NULL, 'j' },
0bb187ca SH	48	{ "file", 1, NULL, 'f' },
	49	{ "help", 0, NULL, 'h' },
	50	{ "interval", 1, NULL, 'i' },
7e8bd80e	51	{ "keys", 1, NULL, 'k' },
0bb187ca SH	52	{ "subject", 1, NULL, 's' },
0bb187ca SH	53	{ "width", 1, NULL, 'w' },
fcc16c22	54	{ "oneline", 0, NULL, 0 },
0bb187ca SH	55	};
	56
	57	static int usage(char *name, int exit_code)
	58	{
8589eb4e MC	59	fprintf(stderr,
	60	"%s Version %s\n"
	61	"Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org>\n"
	62	"This program is free software licensed under GNU GPLv2\nwith ABSOLUTELY NO WARRANTY.\n"
	63	"\n"
	64	"Parameters:\n"
	65	" -V --version Print Version of Program\n"
	66	" -c --count <count> "
	67	"Print <count> number of intervals\n"
	68	" -d --dump "
	69	"Dump list of available files/keys\n"
	70	" -j --json "
	71	"Display in JSON format\n"
	72	" -f --file <file> Statistics file to use\n"
	73	" -h --help This help message\n"
	74	" -i --interval <intv> "
	75	"Set interval to 'intv' seconds\n"
	76	" -k --keys k,k,k,... Display only keys specified\n"
	77	" -s --subject [0-2] Control header printing:\n"
	78	" 0 = never\n"
	79	" 1 = once\n"
	80	" 2 = every 20 lines (default))\n"
	81	" -w --width n,n,n,... Width for each field\n"
	82	"\n",
d530608d	83	name, version);
0bb187ca SH	84
	85	exit(exit_code);
	86	}
	87
	88	struct field_param {
	89	const char *name;
	90	struct lnstat_field *lf;
	91	struct {
	92	unsigned int width;
	93	} print;
	94	};
	95
	96	struct field_params {
	97	unsigned int num;
	98	struct field_param params[MAX_FIELDS];
	99	};
	100
	101	static void print_line(FILE of, const struct lnstat_file lnstat_files,
	102	const struct field_params *fp)
	103	{
	104	int i;
	105
	106	for (i = 0; i < fp->num; i++) {
a4f9e8df	107	const struct lnstat_field *lf = fp->params[i].lf;
0bb187ca	108
468dec75	109	fprintf(of, "%*lu\|", fp->params[i].print.width, lf->result);
0bb187ca SH	110	}
	111	fputc('\n', of);
	112	}
	113
a4f9e8df SH	114	static void print_json(FILE of, const struct lnstat_file lnstat_files,
	115	const struct field_params *fp)
	116	{
fcc16c22	117	json_writer_t *jw = jsonw_new(of);
a4f9e8df	118	int i;
a4f9e8df	119
fcc16c22	120	jsonw_start_object(jw);
a4f9e8df SH	121	for (i = 0; i < fp->num; i++) {
a4f9e8df SH	122	const struct lnstat_field *lf = fp->params[i].lf;
3d0b7439	123
fcc16c22	124	jsonw_uint_field(jw, lf->name, lf->result);
a4f9e8df	125	}
fcc16c22 SH	126	jsonw_end_object(jw);
fcc16c22 SH	127	jsonw_destroy(&jw);
a4f9e8df SH	128	}
a4f9e8df SH	129
0bb187ca SH	130	/* find lnstat_field according to user specification */
	131	static int map_field_params(struct lnstat_file *lnstat_files,
	132	struct field_params *fps, int interval)
	133	{
	134	int i, j = 0;
	135	struct lnstat_file *lf;
	136
	137	/* no field specification on commandline, need to build default */
	138	if (!fps->num) {
	139	for (lf = lnstat_files; lf; lf = lf->next) {
	140	for (i = 0; i < lf->num_fields; i++) {
	141	fps->params[j].lf = &lf->fields[i];
	142	fps->params[j].lf->file->interval.tv_sec =
	143	interval;
	144	if (!fps->params[j].print.width)
ae665a52	145	fps->params[j].print.width =
0bb187ca	146	FIELD_WIDTH_DEFAULT;
3d0b7439	147
f309d0ae SH	148	if (++j >= MAX_FIELDS - 1) {
f309d0ae SH	149	fprintf(stderr,
acd1e437	150	"WARN: MAX_FIELDS (%d) reached, truncating number of keys\n",
f309d0ae	151	MAX_FIELDS);
f493dc30	152	goto full;
f309d0ae	153	}
0bb187ca SH	154	}
0bb187ca SH	155	}
acd1e437	156	full:
0bb187ca SH	157	fps->num = j;
	158	return 1;
	159	}
	160
	161	for (i = 0; i < fps->num; i++) {
	162	fps->params[i].lf = lnstat_find_field(lnstat_files,
	163	fps->params[i].name);
	164	if (!fps->params[i].lf) {
	165	fprintf(stderr, "Field `%s' unknown\n",
	166	fps->params[i].name);
	167	return 0;
	168	}
	169	fps->params[i].lf->file->interval.tv_sec = interval;
	170	if (!fps->params[i].print.width)
	171	fps->params[i].print.width = FIELD_WIDTH_DEFAULT;
	172	}
	173	return 1;
	174	}
	175
	176	struct table_hdr {
	177	int num_lines;
	178	char *hdr[HDR_LINES];
	179	};
	180
	181	static struct table_hdr build_hdr_string(struct lnstat_file lnstat_files,
	182	struct field_params *fps,
	183	int linewidth)
	184	{
acd1e437	185	int h, i;
0bb187ca SH	186	static struct table_hdr th;
	187	int ofs = 0;
	188
f89bb021 PS	189	for (i = 0; i < HDR_LINES; i++)
f89bb021 PS	190	th.hdr[i] = calloc(1, HDR_LINE_LENGTH);
0bb187ca SH	191
	192	for (i = 0; i < fps->num; i++) {
	193	char cname, fname = fps->params[i].lf->name;
0bb187ca SH	194	unsigned int width = fps->params[i].print.width;
0bb187ca SH	195
468dec75	196	snprintf(th.hdr[0]+ofs, width+2, "%.s\|", width, width,
0bb187ca SH	197	fps->params[i].lf->file->basename);
	198
	199	cname = fname;
	200	for (h = 1; h < HDR_LINES; h++) {
	201	if (cname - fname >= strlen(fname))
468dec75 SH	202	snprintf(th.hdr[h]+ofs, width+2,
468dec75 SH	203	"%.s\|", width, width, "");
0bb187ca SH	204	else {
0bb187ca SH	205	th.num_lines = h+1;
468dec75 SH	206	snprintf(th.hdr[h]+ofs, width+2,
468dec75 SH	207	"%.s\|", width, width, cname);
0bb187ca SH	208	}
	209	cname += width;
	210	}
	211	ofs += width+1;
	212	}
	213	/* fill in spaces */
	214	for (h = 1; h <= th.num_lines; h++) {
	215	for (i = 0; i < ofs; i++) {
	216	if (th.hdr[h][i] == '\0')
	217	th.hdr[h][i] = ' ';
	218	}
	219	}
	220
	221	return &th;
	222	}
	223
	224	static int print_hdr(FILE of, struct table_hdr th)
	225	{
	226	int i;
	227
	228	for (i = 0; i < th->num_lines; i++) {
	229	fputs(th->hdr[i], of);
	230	fputc('\n', of);
	231	}
	232	return 0;
	233	}
ae665a52	234
0bb187ca SH	235
	236	int main(int argc, char **argv)
	237	{
	238	struct lnstat_file *lnstat_files;
	239	const char *basename;
a4f9e8df	240	int i, c;
0bb187ca SH	241	int interval = DEFAULT_INTERVAL;
	242	int hdr = 2;
	243	enum {
	244	MODE_DUMP,
a4f9e8df	245	MODE_JSON,
0bb187ca SH	246	MODE_NORMAL,
0bb187ca SH	247	} mode = MODE_NORMAL;
e7e2913f	248	unsigned long count = 0;
a4f9e8df	249	struct table_hdr *header;
0bb187ca SH	250	static struct field_params fp;
	251	int num_req_files = 0;
	252	char *req_files[LNSTAT_MAX_FILES];
ae665a52	253
0bb187ca SH	254	/* backwards compatibility mode for old tools */
0bb187ca SH	255	basename = strrchr(argv[0], '/');
ae665a52	256	if (basename)
0bb187ca SH	257	basename += 1; /* name after slash */
	258	else
	259	basename = argv[0]; /* no slash */
	260
	261	if (!strcmp(basename, "rtstat")) {
	262	/* rtstat compatibility mode */
	263	req_files[0] = "rt_cache";
	264	num_req_files = 1;
	265	} else if (!strcmp(basename, "ctstat")) {
	266	/* ctstat compatibility mode */
	267	req_files[0] = "ip_conntrack";
	268	num_req_files = 1;
	269	}
	270
acd1e437	271	while ((c = getopt_long(argc, argv, "Vc:djpf:h?i:k:s:w:",
0bb187ca	272	opts, NULL)) != -1) {
a4f9e8df	273	int len = 0;
e796b958 SH	274	char tmp, tok;
e796b958 SH	275
0bb187ca	276	switch (c) {
a4f9e8df SH	277	case 'c':
	278	count = strtoul(optarg, NULL, 0);
	279	break;
	280	case 'd':
	281	mode = MODE_DUMP;
	282	break;
	283	case 'j':
	284	mode = MODE_JSON;
	285	break;
	286	case 'f':
	287	req_files[num_req_files++] = strdup(optarg);
	288	break;
	289	case '?':
	290	case 'h':
	291	usage(argv[0], 0);
	292	break;
	293	case 'i':
	294	sscanf(optarg, "%u", &interval);
	295	break;
	296	case 'k':
	297	tmp = strdup(optarg);
	298	if (!tmp)
0bb187ca	299	break;
a4f9e8df SH	300	for (tok = strtok(tmp, ",");
	301	tok;
	302	tok = strtok(NULL, ",")) {
	303	if (fp.num >= MAX_FIELDS) {
3d0b7439	304	fprintf(stderr,
acd1e437	305	"WARN: too many keys requested: (%d max)\n",
a4f9e8df	306	MAX_FIELDS);
0bb187ca	307	break;
0bb187ca	308	}
a4f9e8df SH	309	fp.params[fp.num++].name = tok;
	310	}
	311	break;
	312	case 's':
	313	sscanf(optarg, "%u", &hdr);
	314	break;
	315	case 'w':
	316	tmp = strdup(optarg);
	317	if (!tmp)
0bb187ca	318	break;
a4f9e8df SH	319	i = 0;
	320	for (tok = strtok(tmp, ",");
	321	tok;
	322	tok = strtok(NULL, ",")) {
	323	len = strtoul(tok, NULL, 0);
	324	if (len > FIELD_WIDTH_MAX)
	325	len = FIELD_WIDTH_MAX;
	326	fp.params[i].print.width = len;
	327	i++;
	328	}
	329	if (i == 1) {
	330	for (i = 0; i < MAX_FIELDS; i++)
0bb187ca	331	fp.params[i].print.width = len;
a4f9e8df SH	332	}
	333	break;
	334	default:
	335	usage(argv[0], 1);
	336	break;
0bb187ca SH	337	}
	338	}
	339
	340	lnstat_files = lnstat_scan_dir(PROC_NET_STAT, num_req_files,
	341	(const char **) req_files);
	342
	343	switch (mode) {
0bb187ca	344	case MODE_DUMP:
b1410e0a	345	lnstat_dump(stdout, lnstat_files);
0bb187ca	346	break;
0bb187ca	347
a4f9e8df SH	348	case MODE_NORMAL:
a4f9e8df SH	349	case MODE_JSON:
0bb187ca SH	350	if (!map_field_params(lnstat_files, &fp, interval))
0bb187ca SH	351	exit(1);
ae665a52	352
0bb187ca SH	353	header = build_hdr_string(lnstat_files, &fp, 80);
	354	if (!header)
	355	exit(1);
	356
acd1e437	357	if (interval < 1)
a4f9e8df	358	interval = 1;
0bb187ca	359
fdb347f7	360	for (i = 0; i < count \|\| !count; i++) {
0bb187ca	361	lnstat_update(lnstat_files);
a4f9e8df SH	362	if (mode == MODE_JSON)
	363	print_json(stdout, lnstat_files, &fp);
	364	else {
fdb347f7 PS	365	if ((hdr > 1 && !(i % 20)) \|\|
fdb347f7 PS	366	(hdr == 1 && i == 0))
a4f9e8df SH	367	print_hdr(stdout, header);
	368	print_line(stdout, lnstat_files, &fp);
	369	}
f50332c5	370	fflush(stdout);
e7e2913f	371	if (i < count - 1 \|\| !count)
a4f9e8df	372	sleep(interval);
0bb187ca	373	}
a4f9e8df	374	break;
0bb187ca SH	375	}
	376
	377	return 1;
	378	}