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 1.19 2004/04/06 14:52:58 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(SG_ERROR_SYSCONF, "_SC_PAGESIZE");
                return NULL;
        }
        if (swapctl(SC_AINFO, &ai) == -1) {
                sg_set_error(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(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(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(SG_ERROR_ENOENT, NULL);
                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:	1.20
Committed:	Wed Apr 7 21:08:40 2004 UTC (20 years, 1 month ago) by tdb
Content type:	text/plain
Branch:	MAIN
CVS Tags:	LIBSTATGRAB_0_10
Changes since 1.19:	+8 -1 lines
Log Message:	The rest of the error handling stuff (except the vector code). I've been extremely unimaginative with the string names in error.c, but they're all in one place so much easier to tidy up. I'm also beginning to wonder if we actually needed an SG_ERROR_SYSTEM_CALL to indicate some call into the system failed - because the majority of our errors are those :-) Still to do, then: - vector code - better string names in error.c - deal with arg string in some way - make use of the error status in statgrab/saidar/examples
#	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	tdb	1.20	* $Id: swap_stats.c,v 1.19 2004/04/06 14:52:58 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	tdb	1.20	sg_set_error(SG_ERROR_SYSCONF, "_SC_PAGESIZE");
88	pajs	1.1	return NULL;
89			}
90			if (swapctl(SC_AINFO, &ai) == -1) {
91	tdb	1.20	sg_set_error(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	tdb	1.20	sg_set_error(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	tdb	1.20	sg_set_error(SG_ERROR_SYSCTLNAMETOMIB, "vm.swap_info");
130	tdb	1.15	return NULL;
131			}
132			for (n = 0; ; ++n) {
133			mib[mibsize] = n;
134			size = sizeof xsw;
135			if (sysctl(mib, mibsize + 1, &xsw, &size, NULL, NULL) < 0) {
136			break;
137			}
138			if (xsw.xsw_version != XSWDEV_VERSION) {
139	tdb	1.20	sg_set_error(SG_ERROR_XSW_VER_MISMATCH, NULL);
140	tdb	1.15	return NULL;
141			}
142			swap_stat.total += (long long) xsw.xsw_nblks;
143			swap_stat.used += (long long) xsw.xsw_used;
144			}
145			if (errno != ENOENT) {
146	tdb	1.20	sg_set_error(SG_ERROR_ENOENT, NULL);
147	tdb	1.15	return NULL;
148			}
149			#else
150	ats	1.18	if((kvmd = sg_get_kvm()) == NULL){
151	pajs	1.4	return NULL;
152			}
153			if ((kvm_getswapinfo(kvmd, &swapinfo, 1,0)) == -1){
154	tdb	1.20	sg_set_error(SG_ERROR_KVM_GETSWAPINFO, NULL);
155	pajs	1.4	return NULL;
156			}
157	pajs	1.1
158	tdb	1.15	swap_stat.total = (long long)swapinfo.ksw_total;
159			swap_stat.used = (long long)swapinfo.ksw_used;
160			#endif
161			swap_stat.total *= pagesize;
162			swap_stat.used *= pagesize;
163			swap_stat.free = swap_stat.total - swap_stat.used;
164	ats	1.7	#endif
165	tdb	1.13	#if defined(NETBSD) \|\| defined(OPENBSD)
166	ats	1.18	if ((uvm = sg_get_uvmexp()) == NULL) {
167	ats	1.7	return NULL;
168			}
169
170			swap_stat.total = (long long)uvm->pagesize * (long long)uvm->swpages;
171			swap_stat.used = (long long)uvm->pagesize * (long long)uvm->swpginuse;
172			swap_stat.free = swap_stat.total - swap_stat.used;
173	tdb	1.12	#endif
174
175	pajs	1.1	return &swap_stat;
176
177			}