aboutsummaryrefslogtreecommitdiffstats
path: root/isdb-t/br-ba-Irara
diff options
context:
space:
mode:
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-18 11:58:49 +0000
ef='#n85'>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 
/* $Id$
 * $URL$
 *
 * plugin for /proc/net/dev parsing
 *
 * Copyright (C) 2003 Michael Reinelt <reinelt@eunet.at>
 * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * This file is part of LCD4Linux.
 *
 * LCD4Linux 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, or (at your option)
 * any later version.
 *
 * LCD4Linux is distributed in the hope that it will 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

/* 
 * exported functions:
 *
 * int plugin_init_netdev (void)
 *  adds functions to access /proc/net/dev
 *
 */


#include "config.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>

#include "debug.h"
#include "plugin.h"
#include "qprintf.h"
#include "hash.h"


static HASH NetDev;
static FILE *Stream = NULL;
static char *DELIMITER = " :|\t\n";

static int parse_netdev(void)
{
    int age;
    int row, col;
    static int first_time = 1;

    /* reread every 10 msec only */
    age = hash_age(&NetDev, NULL);
    if (age > 0 && age <= 10)
	return 0;

    if (Stream == NULL)
	Stream = fopen("/proc/net/dev", "r");
    if (Stream == NULL) {
	error("fopen(/proc/net/dev) failed: %s", strerror(errno));
	return -1;
    }

    rewind(Stream);
    row = 0;

    while (!feof(Stream)) {
	char buffer[256];
	char dev[16];
	char *beg, *end;
	unsigned int len;

	if (fgets(buffer, sizeof(buffer), Stream) == NULL)
	    break;

	switch (++row) {

	case 1:
	    /* skip row 1 */
	    continue;

	case 2:
	    /* row 2 used for headers */
	    if (first_time) {
		char *RxTx = strrchr(buffer, '|');
		first_time = 0;
		col = 0;
		beg = buffer;
		while (beg) {
		    char key[32];

		    while (strchr(DELIMITER, *beg))
			beg++;
		    if ((end = strpbrk(beg, DELIMITER)) != NULL)
			*end = '\0';
		    qprintf(key, sizeof(key), "%s_%s", beg < RxTx ? "Rx" : "Tx", beg);
		    hash_set_column(&NetDev, col++, key);
		    beg = end ? end + 1 : NULL;
		}
	    }
	    continue;

	default:
	    /* fetch interface name (1st column) as key */
	    beg = buffer;
	    while (*beg && *beg == ' ')
		beg++;
	    end = beg + 1;
	    while (*end && *end != ':')
		end++;
	    len = end - beg;
	    if (len >= sizeof(dev))
		len = sizeof(dev) - 1;
	    strncpy(dev, beg, len);
	    dev[len] = '\0';

	    hash_put_delta(&NetDev, dev, buffer);
	}
    }

    return 0;
}

static void my_netdev(RESULT * result, RESULT * arg1, RESULT * arg2, RESULT * arg3)
{
    char *dev, *key;
    int delay;
    double value;

    if (parse_netdev() < 0) {
	SetResult(&result, R_STRING, "");
	return;
    }

    dev = R2S(arg1);
    key = R2S(arg2);
    delay = R2N(arg3);

    value = hash_get_regex(&NetDev, dev, key, delay);

    SetResult(&result, R_NUMBER, &value);
}

static void my_netdev_fast(RESULT * result, RESULT * arg1, RESULT * arg2, RESULT * arg3)
{
    char *dev, *key;
    int delay;
    double value;

    if (parse_netdev() < 0) {
	SetResult(&result, R_STRING, "");
	return;
    }

    dev = R2S(arg1);
    key = R2S(arg2);
    delay = R2N(arg3);

    value = hash_get_delta(&NetDev, dev, key, delay);

    SetResult(&result, R_NUMBER, &value);
}


int plugin_init_netdev(void)
{
    hash_create(&NetDev);
    hash_set_delimiter(&NetDev, " :|\t\n");

    AddFunction("netdev", 3, my_netdev);
    AddFunction("netdev::fast", 3, my_netdev_fast);
    return 0;
}

void plugin_exit_netdev(void)
{
    if (Stream != NULL) {
	fclose(Stream);
	Stream = NULL;
    }
    hash_destroy(&NetDev);
}