src/libstatgrab/swap_stats.c

/*
 * i-scream central monitoring system
 * http://www.i-scream.org
 * Copyright (C) 2000-2004 i-scream
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
 * 02111-1307 USA
 *
 * $Id: swap_stats.c,v 1.14 2004/02/14 00:04:12 ats Exp $
 */

#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
#if defined(LINUX) || defined(CYGWIN)
#include <stdio.h>
#include <string.h>
#endif
#ifdef FREEBSD
#ifdef FREEBSD5
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#else
#include <unistd.h>
#include <sys/types.h>
#include <kvm.h>
#endif
#endif
#if defined(NETBSD) || defined(OPENBSD)
#include <sys/param.h>
#include <sys/time.h>
#include <uvm/uvm.h>
#endif

swap_stat_t *get_swap_stats(){

        static swap_stat_t swap_stat;

#ifdef SOLARIS
        struct anoninfo ai;
        int pagesize;
#endif
#if defined(LINUX) || defined(CYGWIN)
        FILE *f;
        char *line_ptr;
        unsigned long long value;
#endif
#ifdef FREEBSD
        int pagesize;
#ifdef FREEBSD5
        struct xswdev xsw;
        int mib[16], n;
        size_t mibsize, size;
#else
        struct kvm_swap swapinfo;
        kvm_t *kvmd;
#endif
#endif
#if defined(NETBSD) || defined(OPENBSD)
        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
#if defined(LINUX) || defined(CYGWIN)
        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
        pagesize=getpagesize();

#ifdef FREEBSD5
        swap_stat.total = 0;
        swap_stat.used = 0;

        mibsize = sizeof mib / sizeof mib[0];
        if (sysctlnametomib("vm.swap_info", mib, &mibsize) < 0) {
                return NULL;
        }
        for (n = 0; ; ++n) {
                mib[mibsize] = n;
                size = sizeof xsw;
                if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, NULL) < 0) {
                        break;
                }
                if (xsw.xsw_version != XSWDEV_VERSION) {
                        return NULL;
                }
                swap_stat.total += (long long) xsw.xsw_nblks;
                swap_stat.used += (long long) xsw.xsw_used;
        }
        if (errno != ENOENT) {
                return NULL;
        }
#else
        if((kvmd = get_kvm()) == NULL){
                return NULL;
        }
        if ((kvm_getswapinfo(kvmd, &swapinfo, 1,0)) == -1){
                return NULL;
        }

        swap_stat.total = (long long)swapinfo.ksw_total;
        swap_stat.used = (long long)swapinfo.ksw_used;
#endif
        swap_stat.total *= pagesize;
        swap_stat.used *= pagesize;
        swap_stat.free = swap_stat.total - swap_stat.used;
#endif
#if defined(NETBSD) || defined(OPENBSD)
        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:	1.15
Committed:	Sat Feb 14 19:03:35 2004 UTC (20 years, 3 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
Changes since 1.14:	+46 -6 lines
Log Message:	Change swap_stats on FreeBSD 5 - no longer uses kvm. This means that we no longer need setgid kmem on FreeBSD 5, or kvm, at all. However, this change doesn't work on FreeBSD 4 - so kvm is still needed there.
#	User	Rev	Content
1	tdb	1.10	/*
2	pajs	1.1	* i-scream central monitoring system
3	tdb	1.5	* http://www.i-scream.org
4	tdb	1.10	* Copyright (C) 2000-2004 i-scream
5	pajs	1.1	*
6	tdb	1.10	* This library is free software; you can redistribute it and/or
7			* modify it under the terms of the GNU Lesser General Public
8			* License as published by the Free Software Foundation; either
9			* version 2.1 of the License, or (at your option) any later version.
10	pajs	1.1	*
11	tdb	1.10	* This library is distributed in the hope that it will be useful,
12	pajs	1.1	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	tdb	1.10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14			* Lesser General Public License for more details.
15	pajs	1.1	*
16	tdb	1.10	* You should have received a copy of the GNU Lesser General Public
17			* License along with this library; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
19			* 02111-1307 USA
20	tdb	1.11	*
21	tdb	1.15	* $Id: swap_stats.c,v 1.14 2004/02/14 00:04:12 ats Exp $
22	pajs	1.1	*/
23
24			#ifdef HAVE_CONFIG_H
25			#include "config.h"
26			#endif
27
28			#include "statgrab.h"
29	ats	1.6	#include "tools.h"
30	pajs	1.1	#ifdef SOLARIS
31			#include <sys/stat.h>
32			#include <sys/swap.h>
33			#include <unistd.h>
34			#endif
35	ats	1.9	#if defined(LINUX) \|\| defined(CYGWIN)
36	pajs	1.3	#include <stdio.h>
37	ats	1.8	#include <string.h>
38	pajs	1.3	#endif
39	pajs	1.4	#ifdef FREEBSD
40	tdb	1.15	#ifdef FREEBSD5
41			#include <sys/param.h>
42			#include <sys/sysctl.h>
43			#include <sys/user.h>
44			#else
45	pajs	1.4	#include <unistd.h>
46			#include <sys/types.h>
47			#include <kvm.h>
48			#endif
49	tdb	1.15	#endif
50	tdb	1.13	#if defined(NETBSD) \|\| defined(OPENBSD)
51	tdb	1.12	#include <sys/param.h>
52	ats	1.14	#include <sys/time.h>
53	tdb	1.12	#include <uvm/uvm.h>
54			#endif
55	pajs	1.1
56			swap_stat_t *get_swap_stats(){
57
58			static swap_stat_t swap_stat;
59
60	pajs	1.3	#ifdef SOLARIS
61	pajs	1.1	struct anoninfo ai;
62			int pagesize;
63	pajs	1.3	#endif
64	ats	1.9	#if defined(LINUX) \|\| defined(CYGWIN)
65	pajs	1.3	FILE *f;
66			char *line_ptr;
67	ats	1.8	unsigned long long value;
68	pajs	1.3	#endif
69	pajs	1.4	#ifdef FREEBSD
70	tdb	1.15	int pagesize;
71			#ifdef FREEBSD5
72			struct xswdev xsw;
73			int mib[16], n;
74			size_t mibsize, size;
75			#else
76	pajs	1.4	struct kvm_swap swapinfo;
77	ats	1.6	kvm_t *kvmd;
78	pajs	1.4	#endif
79	tdb	1.15	#endif
80	tdb	1.12	#if defined(NETBSD) \|\| defined(OPENBSD)
81	ats	1.7	struct uvmexp *uvm;
82			#endif
83	pajs	1.1
84	pajs	1.3	#ifdef SOLARIS
85	pajs	1.1	if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
86			return NULL;
87			}
88			if (swapctl(SC_AINFO, &ai) == -1) {
89			return NULL;
90			}
91			swap_stat.total = (long long)ai.ani_max * (long long)pagesize;
92			swap_stat.used = (long long)ai.ani_resv * (long long)pagesize;
93			swap_stat.free = swap_stat.total - swap_stat.used;
94	pajs	1.3	#endif
95	ats	1.9	#if defined(LINUX) \|\| defined(CYGWIN)
96	ats	1.8	if ((f = fopen("/proc/meminfo", "r")) == NULL) {
97	pajs	1.3	return NULL;
98			}
99	ats	1.8
100			while ((line_ptr = f_read_line(f, "")) != NULL) {
101			if (sscanf(line_ptr, "%*s %llu kB", &value) != 1) {
102			continue;
103			}
104			value *= 1024;
105
106			if (strncmp(line_ptr, "SwapTotal:", 10) == 0) {
107			swap_stat.total = value;
108			} else if (strncmp(line_ptr, "SwapFree:", 9) == 0) {
109			swap_stat.free = value;
110			}
111	pajs	1.3	}
112	ats	1.8
113	pajs	1.3	fclose(f);
114	ats	1.8	swap_stat.used = swap_stat.total - swap_stat.free;
115	pajs	1.3	#endif
116	pajs	1.4	#ifdef FREEBSD
117	tdb	1.15	pagesize=getpagesize();
118
119			#ifdef FREEBSD5
120			swap_stat.total = 0;
121			swap_stat.used = 0;
122
123			mibsize = sizeof mib / sizeof mib[0];
124			if (sysctlnametomib("vm.swap_info", mib, &mibsize) < 0) {
125			return NULL;
126			}
127			for (n = 0; ; ++n) {
128			mib[mibsize] = n;
129			size = sizeof xsw;
130			if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, NULL) < 0) {
131			break;
132			}
133			if (xsw.xsw_version != XSWDEV_VERSION) {
134			return NULL;
135			}
136			swap_stat.total += (long long) xsw.xsw_nblks;
137			swap_stat.used += (long long) xsw.xsw_used;
138			}
139			if (errno != ENOENT) {
140			return NULL;
141			}
142			#else
143	ats	1.6	if((kvmd = get_kvm()) == NULL){
144	pajs	1.4	return NULL;
145			}
146			if ((kvm_getswapinfo(kvmd, &swapinfo, 1,0)) == -1){
147			return NULL;
148			}
149	pajs	1.1
150	tdb	1.15	swap_stat.total = (long long)swapinfo.ksw_total;
151			swap_stat.used = (long long)swapinfo.ksw_used;
152			#endif
153			swap_stat.total *= pagesize;
154			swap_stat.used *= pagesize;
155			swap_stat.free = swap_stat.total - swap_stat.used;
156	ats	1.7	#endif
157	tdb	1.13	#if defined(NETBSD) \|\| defined(OPENBSD)
158	ats	1.7	if ((uvm = get_uvmexp()) == NULL) {
159			return NULL;
160			}
161
162			swap_stat.total = (long long)uvm->pagesize * (long long)uvm->swpages;
163			swap_stat.used = (long long)uvm->pagesize * (long long)uvm->swpginuse;
164			swap_stat.free = swap_stat.total - swap_stat.used;
165	tdb	1.12	#endif
166
167	pajs	1.1	return &swap_stat;
168
169			}