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>
#include <string.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;
        unsigned long long value;
#endif
#ifdef FREEBSD
        struct kvm_swap swapinfo;
        int pagesize;
        kvm_t *kvmd;
#endif
#ifdef NETBSD
        struct uvmexp *uvm;
#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;
        }

        while ((line_ptr = f_read_line(f, "")) != NULL) {
                if (sscanf(line_ptr, "%*s %llu kB", &value) != 1) {
                        continue;
                }
                value *= 1024;

                if (strncmp(line_ptr, "SwapTotal:", 10) == 0) {
                        swap_stat.total = value;
                } else if (strncmp(line_ptr, "SwapFree:", 9) == 0) {
                        swap_stat.free = value;
                }
        }

        fclose(f);
        swap_stat.used = swap_stat.total - swap_stat.free;
#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
#ifdef NETBSD
        if ((uvm = get_uvmexp()) == NULL) {
                return NULL;
        }

        swap_stat.total = (long long)uvm->pagesize * (long long)uvm->swpages;
        swap_stat.used = (long long)uvm->pagesize * (long long)uvm->swpginuse;
        swap_stat.free = swap_stat.total - swap_stat.used;
#endif
        return &swap_stat;

}
Revision:	1.8
Committed:	Fri Oct 24 17:26:43 2003 UTC (20 years, 6 months ago) by ats
Content type:	text/plain
Branch:	MAIN
Changes since 1.7:	+17 -8 lines
Log Message:	Support memory, swap and paging stats on Linux 2.6. For memory and swap, this just means reading the new-style data in /proc/meminfo (since it's present in 2.2 and 2.4 too); for paging, this means trying to read /proc/vmstat if it's available, else reading /proc/stat (for 2.2).
#	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	ats	1.8	#include <string.h>
35	pajs	1.3	#endif
36	pajs	1.4	#ifdef FREEBSD
37			#include <unistd.h>
38			#include <sys/types.h>
39			#include <kvm.h>
40			#endif
41	pajs	1.1
42			swap_stat_t *get_swap_stats(){
43
44			static swap_stat_t swap_stat;
45
46	pajs	1.3	#ifdef SOLARIS
47	pajs	1.1	struct anoninfo ai;
48			int pagesize;
49	pajs	1.3	#endif
50			#ifdef LINUX
51			FILE *f;
52			char *line_ptr;
53	ats	1.8	unsigned long long value;
54	pajs	1.3	#endif
55	pajs	1.4	#ifdef FREEBSD
56			struct kvm_swap swapinfo;
57			int pagesize;
58	ats	1.6	kvm_t *kvmd;
59	pajs	1.4	#endif
60	ats	1.7	#ifdef NETBSD
61			struct uvmexp *uvm;
62			#endif
63	pajs	1.1
64	pajs	1.3	#ifdef SOLARIS
65	pajs	1.1	if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
66			return NULL;
67			}
68			if (swapctl(SC_AINFO, &ai) == -1) {
69			return NULL;
70			}
71			swap_stat.total = (long long)ai.ani_max * (long long)pagesize;
72			swap_stat.used = (long long)ai.ani_resv * (long long)pagesize;
73			swap_stat.free = swap_stat.total - swap_stat.used;
74	pajs	1.3	#endif
75			#ifdef LINUX
76	ats	1.8	if ((f = fopen("/proc/meminfo", "r")) == NULL) {
77	pajs	1.3	return NULL;
78			}
79	ats	1.8
80			while ((line_ptr = f_read_line(f, "")) != NULL) {
81			if (sscanf(line_ptr, "%*s %llu kB", &value) != 1) {
82			continue;
83			}
84			value *= 1024;
85
86			if (strncmp(line_ptr, "SwapTotal:", 10) == 0) {
87			swap_stat.total = value;
88			} else if (strncmp(line_ptr, "SwapFree:", 9) == 0) {
89			swap_stat.free = value;
90			}
91	pajs	1.3	}
92	ats	1.8
93	pajs	1.3	fclose(f);
94	ats	1.8	swap_stat.used = swap_stat.total - swap_stat.free;
95	pajs	1.3	#endif
96	pajs	1.4	#ifdef FREEBSD
97	ats	1.6	if((kvmd = get_kvm()) == NULL){
98	pajs	1.4	return NULL;
99			}
100			if ((kvm_getswapinfo(kvmd, &swapinfo, 1,0)) == -1){
101			return NULL;
102			}
103			pagesize=getpagesize();
104	pajs	1.1
105	pajs	1.4	swap_stat.total= (long long)swapinfo.ksw_total * (long long)pagesize;
106			swap_stat.used = (long long)swapinfo.ksw_used * (long long)pagesize;
107			swap_stat.free = swap_stat.total-swap_stat.used;
108	ats	1.7	#endif
109			#ifdef NETBSD
110			if ((uvm = get_uvmexp()) == NULL) {
111			return NULL;
112			}
113
114			swap_stat.total = (long long)uvm->pagesize * (long long)uvm->swpages;
115			swap_stat.used = (long long)uvm->pagesize * (long long)uvm->swpginuse;
116			swap_stat.free = swap_stat.total - swap_stat.used;
117	pajs	1.4	#endif
118	pajs	1.1	return &swap_stat;
119
120			}