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/*
** ZABBIX
** Copyright (C) 2000-2005 SIA Zabbix
**
** 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.
**/
#include "common.h"
#include "log.h"
#include "logfiles.h"
/******************************************************************************
* *
* Function: process_log *
* *
* Purpose: Get message from logfile *
* *
* Parameters: filename - logfile name *
* lastlogsize - offset for message *
* value - pointer for logged message *
* *
* Return value: returns SUCCEED on succesfull reading, *
* FAIL on other cases *
* *
* Author: Eugene Grigorjev *
* *
* Comments: *
* This function allocate memory for 'value', because use zbx_free. *
* Return SUCCEED and NULL value if end of file received. *
* *
* *
******************************************************************************/
int process_log(
char *filename,
long *lastlogsize,
char **value
)
{
FILE *f = NULL;
struct stat buf;
int ret = FAIL;
assert(filename);
assert(lastlogsize);
assert(value);
zabbix_log( LOG_LEVEL_DEBUG, "In process log (%s,%li)",
filename,
*lastlogsize);
/* Handling of file shrinking */
if( 0 != stat(filename,&buf) )
{
zabbix_log( LOG_LEVEL_WARNING, "Cannot open [%s] [%s]", filename, strerror(errno));
}
else
{
if(buf.st_size<*lastlogsize)
{
*lastlogsize=0;
}
if(NULL == (f = fopen(filename,"r") ))
{
zabbix_log( LOG_LEVEL_WARNING, "Cannot open [%s] [%s]", filename, strerror(errno));
}
else
{
if(-1 == fseek(f,*lastlogsize,SEEK_SET))
{
zabbix_log( LOG_LEVEL_WARNING, "Cannot set postition to [%li] for [%s] [%s]", *lastlogsize, filename, strerror(errno));
}
else
{
*value = zbx_malloc(*value, MAX_BUF_LEN);
memset(*value, 0, MAX_BUF_LEN);
if(NULL == fgets(*value, MAX_BUF_LEN-1, f))
{
/* EOF */
zbx_free(*value);
}
else
{
*lastlogsize = ftell(f);
zbx_rtrim(*value, "\r\n");
}
ret = SUCCEED;
}
zbx_fclose(f);
}
}
return ret;
}
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