src/libstatgrab/swap_stats.c

/*
 * i-scream libstatgrab
 * 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 1.20 2004/04/07 21:08:40 tdb 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
#if defined(FREEBSD) || defined(DFBSD)
#ifdef FREEBSD5
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#else
#include <sys/types.h>
#include <kvm.h>
#endif
#include <unistd.h>
#endif
#if defined(NETBSD) || defined(OPENBSD)
#include <sys/param.h>
#include <sys/time.h>
#include <uvm/uvm.h>
#include <unistd.h>
#endif

sg_swap_stats *sg_get_swap_stats(){

        static sg_swap_stats 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
#if defined(FREEBSD) || defined(DFBSD)
        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){
                sg_set_error_with_errno(SG_ERROR_SYSCONF, "_SC_PAGESIZE");
                return NULL;
        }
        if (swapctl(SC_AINFO, &ai) == -1) {
                sg_set_error_with_errno(SG_ERROR_SWAPCTL, NULL);
                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) {
                sg_set_error_with_errno(SG_ERROR_OPEN, "/proc/meminfo");
                return NULL;
        }

        while ((line_ptr = sg_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
#if defined(FREEBSD) || defined(DFBSD)
        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) {
                sg_set_error_with_errno(SG_ERROR_SYSCTLNAMETOMIB,
                                        "vm.swap_info");
                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) {
                        sg_set_error(SG_ERROR_XSW_VER_MISMATCH, NULL);
                        return NULL;
                }
                swap_stat.total += (long long) xsw.xsw_nblks;
                swap_stat.used += (long long) xsw.xsw_used;
        }
        if (errno != ENOENT) {
                sg_set_error_with_errno(SG_ERROR_SYSCTL, "vm.swap_info");
                return NULL;
        }
#else
        if((kvmd = sg_get_kvm()) == NULL){
                return NULL;
        }
        if ((kvm_getswapinfo(kvmd, &swapinfo, 1,0)) == -1){
                sg_set_error(SG_ERROR_KVM_GETSWAPINFO, NULL);
                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 = sg_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:	1.21
Committed:	Sun Jul 18 21:30:11 2004 UTC (19 years, 10 months ago) by ats
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LIBSTATGRAB_0_10_3, LIBSTATGRAB_0_10_2, LIBSTATGRAB_0_10_1
Changes since 1.20:	+7 -6 lines
Log Message:	Use sg_set_error_with_errno whenever errno's valid. Change the one user of SG_ERROR_ENOENT to SG_ERROR_SYSCTL instead (since that's what it should have been).
#	User	Rev	Content
1	tdb	1.10	/*
2	tdb	1.19	* i-scream libstatgrab
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	ats	1.21	* $Id: swap_stats.c,v 1.20 2004/04/07 21:08:40 tdb 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	tdb	1.16	#if defined(FREEBSD) \|\| defined(DFBSD)
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 <sys/types.h>
46			#include <kvm.h>
47			#endif
48	tdb	1.17	#include <unistd.h>
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	tdb	1.17	#include <unistd.h>
55	tdb	1.12	#endif
56	pajs	1.1
57	ats	1.18	sg_swap_stats *sg_get_swap_stats(){
58	pajs	1.1
59	ats	1.18	static sg_swap_stats swap_stat;
60	pajs	1.1
61	pajs	1.3	#ifdef SOLARIS
62	pajs	1.1	struct anoninfo ai;
63			int pagesize;
64	pajs	1.3	#endif
65	ats	1.9	#if defined(LINUX) \|\| defined(CYGWIN)
66	pajs	1.3	FILE *f;
67			char *line_ptr;
68	ats	1.8	unsigned long long value;
69	pajs	1.3	#endif
70	tdb	1.16	#if defined(FREEBSD) \|\| defined(DFBSD)
71	tdb	1.15	int pagesize;
72			#ifdef FREEBSD5
73			struct xswdev xsw;
74			int mib[16], n;
75			size_t mibsize, size;
76			#else
77	pajs	1.4	struct kvm_swap swapinfo;
78	ats	1.6	kvm_t *kvmd;
79	pajs	1.4	#endif
80	tdb	1.15	#endif
81	tdb	1.12	#if defined(NETBSD) \|\| defined(OPENBSD)
82	ats	1.7	struct uvmexp *uvm;
83			#endif
84	pajs	1.1
85	pajs	1.3	#ifdef SOLARIS
86	pajs	1.1	if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
87	ats	1.21	sg_set_error_with_errno(SG_ERROR_SYSCONF, "_SC_PAGESIZE");
88	pajs	1.1	return NULL;
89			}
90			if (swapctl(SC_AINFO, &ai) == -1) {
91	ats	1.21	sg_set_error_with_errno(SG_ERROR_SWAPCTL, NULL);
92	pajs	1.1	return NULL;
93			}
94			swap_stat.total = (long long)ai.ani_max * (long long)pagesize;
95			swap_stat.used = (long long)ai.ani_resv * (long long)pagesize;
96			swap_stat.free = swap_stat.total - swap_stat.used;
97	pajs	1.3	#endif
98	ats	1.9	#if defined(LINUX) \|\| defined(CYGWIN)
99	ats	1.8	if ((f = fopen("/proc/meminfo", "r")) == NULL) {
100	ats	1.21	sg_set_error_with_errno(SG_ERROR_OPEN, "/proc/meminfo");
101	pajs	1.3	return NULL;
102			}
103	ats	1.8
104	ats	1.18	while ((line_ptr = sg_f_read_line(f, "")) != NULL) {
105	ats	1.8	if (sscanf(line_ptr, "%*s %llu kB", &value) != 1) {
106			continue;
107			}
108			value *= 1024;
109
110			if (strncmp(line_ptr, "SwapTotal:", 10) == 0) {
111			swap_stat.total = value;
112			} else if (strncmp(line_ptr, "SwapFree:", 9) == 0) {
113			swap_stat.free = value;
114			}
115	pajs	1.3	}
116	ats	1.8
117	pajs	1.3	fclose(f);
118	ats	1.8	swap_stat.used = swap_stat.total - swap_stat.free;
119	pajs	1.3	#endif
120	tdb	1.16	#if defined(FREEBSD) \|\| defined(DFBSD)
121	tdb	1.15	pagesize=getpagesize();
122
123			#ifdef FREEBSD5
124			swap_stat.total = 0;
125			swap_stat.used = 0;
126
127			mibsize = sizeof mib / sizeof mib[0];
128			if (sysctlnametomib("vm.swap_info", mib, &mibsize) < 0) {
129	ats	1.21	sg_set_error_with_errno(SG_ERROR_SYSCTLNAMETOMIB,
130			"vm.swap_info");
131	tdb	1.15	return NULL;
132			}
133			for (n = 0; ; ++n) {
134			mib[mibsize] = n;
135			size = sizeof xsw;
136			if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, NULL) < 0) {
137			break;
138			}
139			if (xsw.xsw_version != XSWDEV_VERSION) {
140	tdb	1.20	sg_set_error(SG_ERROR_XSW_VER_MISMATCH, NULL);
141	tdb	1.15	return NULL;
142			}
143			swap_stat.total += (long long) xsw.xsw_nblks;
144			swap_stat.used += (long long) xsw.xsw_used;
145			}
146			if (errno != ENOENT) {
147	ats	1.21	sg_set_error_with_errno(SG_ERROR_SYSCTL, "vm.swap_info");
148	tdb	1.15	return NULL;
149			}
150			#else
151	ats	1.18	if((kvmd = sg_get_kvm()) == NULL){
152	pajs	1.4	return NULL;
153			}
154			if ((kvm_getswapinfo(kvmd, &swapinfo, 1,0)) == -1){
155	tdb	1.20	sg_set_error(SG_ERROR_KVM_GETSWAPINFO, NULL);
156	pajs	1.4	return NULL;
157			}
158	pajs	1.1
159	tdb	1.15	swap_stat.total = (long long)swapinfo.ksw_total;
160			swap_stat.used = (long long)swapinfo.ksw_used;
161			#endif
162			swap_stat.total *= pagesize;
163			swap_stat.used *= pagesize;
164			swap_stat.free = swap_stat.total - swap_stat.used;
165	ats	1.7	#endif
166	tdb	1.13	#if defined(NETBSD) \|\| defined(OPENBSD)
167	ats	1.18	if ((uvm = sg_get_uvmexp()) == NULL) {
168	ats	1.7	return NULL;
169			}
170
171			swap_stat.total = (long long)uvm->pagesize * (long long)uvm->swpages;
172			swap_stat.used = (long long)uvm->pagesize * (long long)uvm->swpginuse;
173			swap_stat.free = swap_stat.total - swap_stat.used;
174	tdb	1.12	#endif
175
176	pajs	1.1	return &swap_stat;
177
178			}