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/*----------------------------------------------------------------------------*/
/* Xymon message daemon. */
/* */
/* This module contains a shared routine to find the size of a shared memory */
/* buffer used for one of the Xymon communications-channels. */
/* */
/* Copyright (C) 2004-2011 Henrik Storner <henrik@hswn.dk> */
/* */
/* This program is released under the GNU General Public License (GPL), */
/* version 2. See the file "COPYING" for details. */
/* */
/*----------------------------------------------------------------------------*/
static char rcsid[] = "$Id: xymond_buffer.c 7217 2013-07-25 16:04:40Z storner $";
#include <unistd.h>
#include <stdlib.h>
#include "libxymon.h"
#include "xymond_buffer.h"
unsigned int shbufsz(enum msgchannels_t chnid)
{
unsigned int defvalue = 0, result = 0;
char *v = NULL;
if (chnid != C_LAST) {
switch (chnid) {
case C_STATUS: v = getenv("MAXMSG_STATUS"); defvalue = 256; break;
case C_CLIENT: v = getenv("MAXMSG_CLIENT"); defvalue = 512; break;
case C_CLICHG: v = getenv("MAXMSG_CLICHG"); defvalue = shbufsz(C_CLIENT); break;
case C_DATA: v = getenv("MAXMSG_DATA"); defvalue = 256; break;
case C_NOTES: v = getenv("MAXMSG_NOTES"); defvalue = 256; break;
case C_STACHG: v = getenv("MAXMSG_STACHG"); defvalue = shbufsz(C_STATUS); break;
case C_PAGE: v = getenv("MAXMSG_PAGE"); defvalue = shbufsz(C_STATUS); break;
case C_ENADIS: v = getenv("MAXMSG_ENADIS"); defvalue = 32; break;
case C_USER: v = getenv("MAXMSG_USER"); defvalue = 128; break;
case C_FEEDBACK_QUEUE: v = getenv("MAXMSG_STATUS"); defvalue = 256; break;
default: break;
}
if (v) {
result = atoi(v);
/* See if it is an old setting in bytes */
if (result > 32*1024) result = (result / 1024);
}
if (result < 32) result = defvalue;
}
else {
enum msgchannels_t i;
unsigned int isz;
result = 0;
for (i=C_STATUS; (i < C_LAST); i++) {
isz = shbufsz(i);
if (isz > result) result = isz;
}
}
return result;
}
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