[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"

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", name, LNSTAT_VERSION);
	fprintf(stderr, "Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org>\n");
	fprintf(stderr, "This program is free software licensed under GNU GPLv2\nwith ABSOLUTELY NO WARRANTY.\n\n");
	fprintf(stderr, "Parameters:\n");
	fprintf(stderr, "\t-V --version\t\tPrint Version of Program\n");
	fprintf(stderr, "\t-c --count <count>\t"
			"Print <count> number of intervals\n");
	fprintf(stderr, "\t-d --dump\t\t"
			"Dump list of available files/keys\n");
	fprintf(stderr, "\t-j --json\t\t"
			"Display in JSON format\n");
	fprintf(stderr, "\t-f --file <file>\tStatistics file to use\n");
	fprintf(stderr, "\t-h --help\t\tThis help message\n");
	fprintf(stderr, "\t-i --interval <intv>\t"
			"Set interval to 'intv' seconds\n");
	fprintf(stderr, "\t-k --keys k,k,k,...\tDisplay only keys specified\n");
	fprintf(stderr, "\t-s --subject [0-2]\tControl header printing:\n");
	fprintf(stderr, "\t\t\t\t0 = never\n");
	fprintf(stderr, "\t\t\t\t1 = once\n");
	fprintf(stderr, "\t\t\t\t2 = every 20 lines (default))\n");
	fprintf(stderr, "\t-w --width n,n,n,...\tWidth for each field\n");
	fprintf(stderr, "\n");

	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 SH	40	#include "lnstat.h"
	41
	42	static struct option opts[] = {
	43	{ "version", 0, NULL, 'V' },
	44	{ "count", 1, NULL, 'c' },
a4f9e8df SH	45	{ "dump", 0, NULL, 'd' },
a4f9e8df SH	46	{ "json", 0, NULL, 'j' },
0bb187ca SH	47	{ "file", 1, NULL, 'f' },
	48	{ "help", 0, NULL, 'h' },
	49	{ "interval", 1, NULL, 'i' },
7e8bd80e	50	{ "keys", 1, NULL, 'k' },
0bb187ca SH	51	{ "subject", 1, NULL, 's' },
0bb187ca SH	52	{ "width", 1, NULL, 'w' },
fcc16c22	53	{ "oneline", 0, NULL, 0 },
0bb187ca SH	54	};
	55
	56	static int usage(char *name, int exit_code)
	57	{
	58	fprintf(stderr, "%s Version %s\n", name, LNSTAT_VERSION);
acd1e437 SH	59	fprintf(stderr, "Copyright (C) 2004 by Harald Welte <laforge@gnumonks.org>\n");
acd1e437 SH	60	fprintf(stderr, "This program is free software licensed under GNU GPLv2\nwith ABSOLUTELY NO WARRANTY.\n\n");
0bb187ca SH	61	fprintf(stderr, "Parameters:\n");
	62	fprintf(stderr, "\t-V --version\t\tPrint Version of Program\n");
	63	fprintf(stderr, "\t-c --count <count>\t"
	64	"Print <count> number of intervals\n");
7e8bd80e	65	fprintf(stderr, "\t-d --dump\t\t"
0bb187ca	66	"Dump list of available files/keys\n");
a4f9e8df SH	67	fprintf(stderr, "\t-j --json\t\t"
a4f9e8df SH	68	"Display in JSON format\n");
0bb187ca SH	69	fprintf(stderr, "\t-f --file <file>\tStatistics file to use\n");
	70	fprintf(stderr, "\t-h --help\t\tThis help message\n");
	71	fprintf(stderr, "\t-i --interval <intv>\t"
	72	"Set interval to 'intv' seconds\n");
	73	fprintf(stderr, "\t-k --keys k,k,k,...\tDisplay only keys specified\n");
869fcabe PS	74	fprintf(stderr, "\t-s --subject [0-2]\tControl header printing:\n");
	75	fprintf(stderr, "\t\t\t\t0 = never\n");
	76	fprintf(stderr, "\t\t\t\t1 = once\n");
	77	fprintf(stderr, "\t\t\t\t2 = every 20 lines (default))\n");
0bb187ca SH	78	fprintf(stderr, "\t-w --width n,n,n,...\tWidth for each field\n");
	79	fprintf(stderr, "\n");
	80
	81	exit(exit_code);
	82	}
	83
	84	struct field_param {
	85	const char *name;
	86	struct lnstat_field *lf;
	87	struct {
	88	unsigned int width;
	89	} print;
	90	};
	91
	92	struct field_params {
	93	unsigned int num;
	94	struct field_param params[MAX_FIELDS];
	95	};
	96
	97	static void print_line(FILE of, const struct lnstat_file lnstat_files,
	98	const struct field_params *fp)
	99	{
	100	int i;
	101
	102	for (i = 0; i < fp->num; i++) {
a4f9e8df	103	const struct lnstat_field *lf = fp->params[i].lf;
0bb187ca	104
468dec75	105	fprintf(of, "%*lu\|", fp->params[i].print.width, lf->result);
0bb187ca SH	106	}
	107	fputc('\n', of);
	108	}
	109
a4f9e8df SH	110	static void print_json(FILE of, const struct lnstat_file lnstat_files,
	111	const struct field_params *fp)
	112	{
fcc16c22	113	json_writer_t *jw = jsonw_new(of);
a4f9e8df	114	int i;
a4f9e8df	115
fcc16c22	116	jsonw_start_object(jw);
a4f9e8df SH	117	for (i = 0; i < fp->num; i++) {
a4f9e8df SH	118	const struct lnstat_field *lf = fp->params[i].lf;
3d0b7439	119
fcc16c22	120	jsonw_uint_field(jw, lf->name, lf->result);
a4f9e8df	121	}
fcc16c22 SH	122	jsonw_end_object(jw);
fcc16c22 SH	123	jsonw_destroy(&jw);
a4f9e8df SH	124	}
a4f9e8df SH	125
0bb187ca SH	126	/* find lnstat_field according to user specification */
	127	static int map_field_params(struct lnstat_file *lnstat_files,
	128	struct field_params *fps, int interval)
	129	{
	130	int i, j = 0;
	131	struct lnstat_file *lf;
	132
	133	/* no field specification on commandline, need to build default */
	134	if (!fps->num) {
	135	for (lf = lnstat_files; lf; lf = lf->next) {
	136	for (i = 0; i < lf->num_fields; i++) {
	137	fps->params[j].lf = &lf->fields[i];
	138	fps->params[j].lf->file->interval.tv_sec =
	139	interval;
	140	if (!fps->params[j].print.width)
ae665a52	141	fps->params[j].print.width =
0bb187ca	142	FIELD_WIDTH_DEFAULT;
3d0b7439	143
f309d0ae SH	144	if (++j >= MAX_FIELDS - 1) {
f309d0ae SH	145	fprintf(stderr,
acd1e437	146	"WARN: MAX_FIELDS (%d) reached, truncating number of keys\n",
f309d0ae	147	MAX_FIELDS);
f493dc30	148	goto full;
f309d0ae	149	}
0bb187ca SH	150	}
0bb187ca SH	151	}
acd1e437	152	full:
0bb187ca SH	153	fps->num = j;
	154	return 1;
	155	}
	156
	157	for (i = 0; i < fps->num; i++) {
	158	fps->params[i].lf = lnstat_find_field(lnstat_files,
	159	fps->params[i].name);
	160	if (!fps->params[i].lf) {
	161	fprintf(stderr, "Field `%s' unknown\n",
	162	fps->params[i].name);
	163	return 0;
	164	}
	165	fps->params[i].lf->file->interval.tv_sec = interval;
	166	if (!fps->params[i].print.width)
	167	fps->params[i].print.width = FIELD_WIDTH_DEFAULT;
	168	}
	169	return 1;
	170	}
	171
	172	struct table_hdr {
	173	int num_lines;
	174	char *hdr[HDR_LINES];
	175	};
	176
	177	static struct table_hdr build_hdr_string(struct lnstat_file lnstat_files,
	178	struct field_params *fps,
	179	int linewidth)
	180	{
acd1e437	181	int h, i;
0bb187ca SH	182	static struct table_hdr th;
	183	int ofs = 0;
	184
f89bb021 PS	185	for (i = 0; i < HDR_LINES; i++)
f89bb021 PS	186	th.hdr[i] = calloc(1, HDR_LINE_LENGTH);
0bb187ca SH	187
	188	for (i = 0; i < fps->num; i++) {
	189	char cname, fname = fps->params[i].lf->name;
0bb187ca SH	190	unsigned int width = fps->params[i].print.width;
0bb187ca SH	191
468dec75	192	snprintf(th.hdr[0]+ofs, width+2, "%.s\|", width, width,
0bb187ca SH	193	fps->params[i].lf->file->basename);
	194
	195	cname = fname;
	196	for (h = 1; h < HDR_LINES; h++) {
	197	if (cname - fname >= strlen(fname))
468dec75 SH	198	snprintf(th.hdr[h]+ofs, width+2,
468dec75 SH	199	"%.s\|", width, width, "");
0bb187ca SH	200	else {
0bb187ca SH	201	th.num_lines = h+1;
468dec75 SH	202	snprintf(th.hdr[h]+ofs, width+2,
468dec75 SH	203	"%.s\|", width, width, cname);
0bb187ca SH	204	}
	205	cname += width;
	206	}
	207	ofs += width+1;
	208	}
	209	/* fill in spaces */
	210	for (h = 1; h <= th.num_lines; h++) {
	211	for (i = 0; i < ofs; i++) {
	212	if (th.hdr[h][i] == '\0')
	213	th.hdr[h][i] = ' ';
	214	}
	215	}
	216
	217	return &th;
	218	}
	219
	220	static int print_hdr(FILE of, struct table_hdr th)
	221	{
	222	int i;
	223
	224	for (i = 0; i < th->num_lines; i++) {
	225	fputs(th->hdr[i], of);
	226	fputc('\n', of);
	227	}
	228	return 0;
	229	}
ae665a52	230
0bb187ca SH	231
	232	int main(int argc, char **argv)
	233	{
	234	struct lnstat_file *lnstat_files;
	235	const char *basename;
a4f9e8df	236	int i, c;
0bb187ca SH	237	int interval = DEFAULT_INTERVAL;
	238	int hdr = 2;
	239	enum {
	240	MODE_DUMP,
a4f9e8df	241	MODE_JSON,
0bb187ca SH	242	MODE_NORMAL,
0bb187ca SH	243	} mode = MODE_NORMAL;
e7e2913f	244	unsigned long count = 0;
a4f9e8df	245	struct table_hdr *header;
0bb187ca SH	246	static struct field_params fp;
	247	int num_req_files = 0;
	248	char *req_files[LNSTAT_MAX_FILES];
ae665a52	249
0bb187ca SH	250	/* backwards compatibility mode for old tools */
0bb187ca SH	251	basename = strrchr(argv[0], '/');
ae665a52	252	if (basename)
0bb187ca SH	253	basename += 1; /* name after slash */
	254	else
	255	basename = argv[0]; /* no slash */
	256
	257	if (!strcmp(basename, "rtstat")) {
	258	/* rtstat compatibility mode */
	259	req_files[0] = "rt_cache";
	260	num_req_files = 1;
	261	} else if (!strcmp(basename, "ctstat")) {
	262	/* ctstat compatibility mode */
	263	req_files[0] = "ip_conntrack";
	264	num_req_files = 1;
	265	}
	266
acd1e437	267	while ((c = getopt_long(argc, argv, "Vc:djpf:h?i:k:s:w:",
0bb187ca	268	opts, NULL)) != -1) {
a4f9e8df	269	int len = 0;
e796b958 SH	270	char tmp, tok;
e796b958 SH	271
0bb187ca	272	switch (c) {
a4f9e8df SH	273	case 'c':
	274	count = strtoul(optarg, NULL, 0);
	275	break;
	276	case 'd':
	277	mode = MODE_DUMP;
	278	break;
	279	case 'j':
	280	mode = MODE_JSON;
	281	break;
	282	case 'f':
	283	req_files[num_req_files++] = strdup(optarg);
	284	break;
	285	case '?':
	286	case 'h':
	287	usage(argv[0], 0);
	288	break;
	289	case 'i':
	290	sscanf(optarg, "%u", &interval);
	291	break;
	292	case 'k':
	293	tmp = strdup(optarg);
	294	if (!tmp)
0bb187ca	295	break;
a4f9e8df SH	296	for (tok = strtok(tmp, ",");
	297	tok;
	298	tok = strtok(NULL, ",")) {
	299	if (fp.num >= MAX_FIELDS) {
3d0b7439	300	fprintf(stderr,
acd1e437	301	"WARN: too many keys requested: (%d max)\n",
a4f9e8df	302	MAX_FIELDS);
0bb187ca	303	break;
0bb187ca	304	}
a4f9e8df SH	305	fp.params[fp.num++].name = tok;
	306	}
	307	break;
	308	case 's':
	309	sscanf(optarg, "%u", &hdr);
	310	break;
	311	case 'w':
	312	tmp = strdup(optarg);
	313	if (!tmp)
0bb187ca	314	break;
a4f9e8df SH	315	i = 0;
	316	for (tok = strtok(tmp, ",");
	317	tok;
	318	tok = strtok(NULL, ",")) {
	319	len = strtoul(tok, NULL, 0);
	320	if (len > FIELD_WIDTH_MAX)
	321	len = FIELD_WIDTH_MAX;
	322	fp.params[i].print.width = len;
	323	i++;
	324	}
	325	if (i == 1) {
	326	for (i = 0; i < MAX_FIELDS; i++)
0bb187ca	327	fp.params[i].print.width = len;
a4f9e8df SH	328	}
	329	break;
	330	default:
	331	usage(argv[0], 1);
	332	break;
0bb187ca SH	333	}
	334	}
	335
	336	lnstat_files = lnstat_scan_dir(PROC_NET_STAT, num_req_files,
	337	(const char **) req_files);
	338
	339	switch (mode) {
0bb187ca	340	case MODE_DUMP:
b1410e0a	341	lnstat_dump(stdout, lnstat_files);
0bb187ca	342	break;
0bb187ca	343
a4f9e8df SH	344	case MODE_NORMAL:
a4f9e8df SH	345	case MODE_JSON:
0bb187ca SH	346	if (!map_field_params(lnstat_files, &fp, interval))
0bb187ca SH	347	exit(1);
ae665a52	348
0bb187ca SH	349	header = build_hdr_string(lnstat_files, &fp, 80);
	350	if (!header)
	351	exit(1);
	352
acd1e437	353	if (interval < 1)
a4f9e8df	354	interval = 1;
0bb187ca	355
fdb347f7	356	for (i = 0; i < count \|\| !count; i++) {
0bb187ca	357	lnstat_update(lnstat_files);
a4f9e8df SH	358	if (mode == MODE_JSON)
	359	print_json(stdout, lnstat_files, &fp);
	360	else {
fdb347f7 PS	361	if ((hdr > 1 && !(i % 20)) \|\|
fdb347f7 PS	362	(hdr == 1 && i == 0))
a4f9e8df SH	363	print_hdr(stdout, header);
	364	print_line(stdout, lnstat_files, &fp);
	365	}
f50332c5	366	fflush(stdout);
e7e2913f	367	if (i < count - 1 \|\| !count)
a4f9e8df	368	sleep(interval);
0bb187ca	369	}
a4f9e8df	370	break;
0bb187ca SH	371	}
	372
	373	return 1;
	374	}