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/*
This file is part of pload - a program to monitor ppp activity for X
Copyright (C) 1999-2000 Matt Smith <mdsmith@engr.utk.edu>
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 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.
*/
/*
proc_stat.c - get stats from linux proc filesystem
example /proc/net/dev contents:
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed
lo:32894796 21239 0 0 0 0 0 0 32894796 21239 0 0 0 0 0 0
ppp0: 3880205 5577 0 0 0 0 0 0 368360 5192 0 0 0 0 0 0
thanks to Mathieu Clabaut <clabault@multimania.com> for catching
the potentially missing space after the device name
*/
#ifdef LINUXPROC
#include <stdio.h> /* fopen, rewind, fgets */
#include <stdlib.h> /* exit, strtoul */
#include <string.h> /* strtok, strstr */
#include "pload.h"
void proc_stat(if_data *ifd)
{
const char sep[] = " :"; /* spaces or colons for field separators */
char *s;
char buf[256];
int i;
int found = 0;
/* if it's not open, open it */
if (ifd->file == NULL)
{
ifd->file = fopen("/proc/net/dev", "r");
if (ifd->file == NULL) die("couldn't fopen /proc/net/dev");
}
/* make sure we are at the start of file */
rewind(ifd->file);
/* skip over first two lines */
(void *)fgets(buf, sizeof(buf), ifd->file);
(void *)fgets(buf, sizeof(buf), ifd->file);
/* loop till we find the specified device */
while ( (found == 0) && (fgets(buf, sizeof(buf), ifd->file) != NULL) )
{
s = strtok(buf, sep);
/* see if the first field is the device */
if (strstr(s, ifd->device) != NULL)
{
/* yup, there it is */
/* now read in the next field IN */
s = strtok(NULL, sep);
ifd->in_bytes = strtoul(s, (char **)NULL, 10);
/* skip the next seven fields */
for (i=0;i<7;i++)
s = strtok(NULL, sep);
/* now read in the OUT bytes field */
s = strtok(NULL, sep);
ifd->out_bytes = strtoul(s, (char **)NULL, 10);
/* done */
/* exit out of while loop */
found = 1;
}
/* nope, can't find it */
}
if (found == 0) /* EOF caught, non-existant or not connected */
{
ifd->in_bytes = 0UL;
ifd->out_bytes = 0UL;
}
else
/* finish to EOF to get new stats next time */
while (fgets(buf, sizeof(buf), ifd->file) != NULL);
return;
}
#endif
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