src/libstatgrab/swap_stats.c

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org
 * Copyright (C) 2000-2003 i-scream
 * 
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "statgrab.h"
#include "tools.h"
#ifdef SOLARIS
#include <sys/stat.h>
#include <sys/swap.h>
#include <unistd.h>
#endif
#ifdef LINUX
#include <stdio.h>
#endif
#ifdef FREEBSD
#include <unistd.h>
#include <sys/types.h>
#include <kvm.h>
#endif

swap_stat_t *get_swap_stats(){

        static swap_stat_t swap_stat;

#ifdef SOLARIS
        struct anoninfo ai;
        int pagesize;
#endif
#ifdef LINUX
        FILE *f;
        char *line_ptr;
#endif
#ifdef FREEBSD
        struct kvm_swap swapinfo;
        int pagesize;
        kvm_t *kvmd;
#endif

#ifdef SOLARIS
        if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
                return NULL;
        }
        if (swapctl(SC_AINFO, &ai) == -1) {
                return NULL;
        }
        swap_stat.total = (long long)ai.ani_max * (long long)pagesize;
        swap_stat.used = (long long)ai.ani_resv * (long long)pagesize;
        swap_stat.free = swap_stat.total - swap_stat.used;
#endif
#ifdef LINUX
        if ((f=fopen("/proc/meminfo", "r" ))==NULL) {
                return NULL;
        }
        if((line_ptr=f_read_line(f, "Swap:"))==NULL){
                fclose(f);
                return NULL;
        }
        if((sscanf(line_ptr, "Swap: %lld %lld %lld", &swap_stat.total, &swap_stat.used, &swap_stat.free))!=3){
                fclose(f);
                return NULL;
        }
        fclose(f);
#endif
#ifdef FREEBSD
        if((kvmd = get_kvm()) == NULL){
                return NULL;
        }
        if ((kvm_getswapinfo(kvmd, &swapinfo, 1,0)) == -1){
                return NULL;
        }
        pagesize=getpagesize();

        swap_stat.total= (long long)swapinfo.ksw_total * (long long)pagesize;
        swap_stat.used = (long long)swapinfo.ksw_used * (long long)pagesize;
        swap_stat.free = swap_stat.total-swap_stat.used;
#endif
        return &swap_stat;

}
Revision:	1.6
Committed:	Sun Oct 19 00:25:30 2003 UTC (20 years, 7 months ago) by ats
Content type:	text/plain
Branch:	MAIN
Changes since 1.5:	+3 -6 lines
Log Message:	Add a helper function for opening the kvm handle. This removes a little bit of duplicated code, and means that we don't open and close kvm (which can potentially be quite expensive) each time we use it. This will also be useful for NetBSD.
#	User	Rev	Content
1	pajs	1.1	/*
2			* i-scream central monitoring system
3	tdb	1.5	* http://www.i-scream.org
4			* Copyright (C) 2000-2003 i-scream
5	pajs	1.1	*
6			* This program is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU General Public License
8			* as published by the Free Software Foundation; either version 2
9			* of the License, or (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19			*/
20
21			#ifdef HAVE_CONFIG_H
22			#include "config.h"
23			#endif
24
25			#include "statgrab.h"
26	ats	1.6	#include "tools.h"
27	pajs	1.1	#ifdef SOLARIS
28			#include <sys/stat.h>
29			#include <sys/swap.h>
30			#include <unistd.h>
31			#endif
32	pajs	1.3	#ifdef LINUX
33			#include <stdio.h>
34			#endif
35	pajs	1.4	#ifdef FREEBSD
36			#include <unistd.h>
37			#include <sys/types.h>
38			#include <kvm.h>
39			#endif
40	pajs	1.1
41			swap_stat_t *get_swap_stats(){
42
43			static swap_stat_t swap_stat;
44
45	pajs	1.3	#ifdef SOLARIS
46	pajs	1.1	struct anoninfo ai;
47			int pagesize;
48	pajs	1.3	#endif
49			#ifdef LINUX
50			FILE *f;
51			char *line_ptr;
52			#endif
53	pajs	1.4	#ifdef FREEBSD
54			struct kvm_swap swapinfo;
55			int pagesize;
56	ats	1.6	kvm_t *kvmd;
57	pajs	1.4	#endif
58	pajs	1.1
59	pajs	1.3	#ifdef SOLARIS
60	pajs	1.1	if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
61			return NULL;
62			}
63			if (swapctl(SC_AINFO, &ai) == -1) {
64			return NULL;
65			}
66			swap_stat.total = (long long)ai.ani_max * (long long)pagesize;
67			swap_stat.used = (long long)ai.ani_resv * (long long)pagesize;
68			swap_stat.free = swap_stat.total - swap_stat.used;
69	pajs	1.3	#endif
70			#ifdef LINUX
71			if ((f=fopen("/proc/meminfo", "r" ))==NULL) {
72			return NULL;
73			}
74			if((line_ptr=f_read_line(f, "Swap:"))==NULL){
75			fclose(f);
76			return NULL;
77			}
78			if((sscanf(line_ptr, "Swap: %lld %lld %lld", &swap_stat.total, &swap_stat.used, &swap_stat.free))!=3){
79			fclose(f);
80			return NULL;
81			}
82			fclose(f);
83			#endif
84	pajs	1.4	#ifdef FREEBSD
85	ats	1.6	if((kvmd = get_kvm()) == NULL){
86	pajs	1.4	return NULL;
87			}
88			if ((kvm_getswapinfo(kvmd, &swapinfo, 1,0)) == -1){
89			return NULL;
90			}
91			pagesize=getpagesize();
92	pajs	1.1
93	pajs	1.4	swap_stat.total= (long long)swapinfo.ksw_total * (long long)pagesize;
94			swap_stat.used = (long long)swapinfo.ksw_used * (long long)pagesize;
95			swap_stat.free = swap_stat.total-swap_stat.used;
96			#endif
97	pajs	1.1	return &swap_stat;
98
99			}