ihost/libstatgrab/swap_stats.c

/* 
 * i-scream central monitoring system
 * http://www.i-scream.org.uk
 * Copyright (C) 2000-2002 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 <stdio.h>
#include "ukcprog.h"
#ifdef SOLARIS
#include <sys/stat.h>
#include <sys/swap.h>
#include <unistd.h>
#endif
#ifdef LINUX
#include <string.h>
#endif
#ifdef FREEBSD
#include <sys/types.h>
#include <pwd.h>
#include <unistd.h>
#include <fcntl.h>
#include <kvm.h>
#include <limits.h>
#include <grp.h>
#endif

char *get_swap_stats(){
        char *xml_swap_stats;
        long swaptotal=0;
        long swapfree=0;
        long swapused=0;
#ifdef SOLARIS
        struct anoninfo ai;
        int pagesize;
#endif
#ifdef LINUX
        char *line;
        FILE *f;
#endif
#ifdef FREEBSD
        gid_t gid;
        struct group *kmem_grp;
        struct kvm_swap swapinfo;
        int pagesize;
        kvm_t *kvmd = NULL;
        char errbuf[_POSIX2_LINE_MAX];
#endif

#ifdef SOLARIS
        if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
                errf("failed to get system pagesize (%m)");
                return NULL;
        }
        if (swapctl(SC_AINFO, &ai) == -1) {
                errf("failed to get swap stats (%m)");
                return NULL;
        }
        swaptotal=((ai.ani_max/1024)*pagesize)/1024;
        swapused=((ai.ani_resv/1024)*pagesize)/1024;
        swapfree=swaptotal-swapused;
#endif
#ifdef LINUX
        if ((f=fopen("/proc/meminfo", "r" ))==NULL) {
                errf("Failed to open memory stats (%m)");
                return NULL;
        }
        while((line=fpgetline(f)) != NULL){
                if (((strncmp(line,"Swap: ",6)) == 0)) {
                        if((sscanf(line, "%*s %ld %ld %ld", &swaptotal, &swapused, &swapfree)) != 3){
                                errf("Failed to read swap details (%m)");
                                return NULL;
                        }
                        break;
                }
        }
        if ((fclose(f)) != 0) {
                errf("Failed to close file (%m)");
                return NULL;
        }
        swaptotal=(swaptotal/1024)/1024;
        swapused=(swapused/1024)/1024;
        swapfree=(swapfree/1024)/1024;
#endif
#ifdef FREEBSD
        /* To do this, this has to be setgid kmem, or be run as root :(
        */
#define MEM_GROUP "kmem"
        if((kmem_grp=getgrnam(MEM_GROUP))==NULL){
                errf("Failed to find gid for kmem (%m)");
                return NULL;
        }
        gid=getgid();
        if((setegid(kmem_grp->gr_gid))!=0){
                errf("Failed to become gid kmem (%m)\nCan not get swap info.");
                return NULL;
        }
        if((kvmd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf)) == NULL){
                errf("Failed to open kvm info to get swap stats (%m)");
                return NULL;
        }
        if ((kvm_getswapinfo(kvmd, &swapinfo, 1,0)) == -1){
                errf("Failed to get swap info (%m)");
                return NULL;
        }
        if((kvm_close(kvmd))!=0){
                errf("Failed to close kvm (%m)");
                return NULL;
        }
        if((setegid(gid))!=0){
                errf("Failed to lose gid kmem (%m)");
                exit(1);
                return NULL;
        }
        pagesize=getpagesize();
        swaptotal=((((long)swapinfo.ksw_total)*pagesize)/1024)/1024;
        swapused=((((long)swapinfo.ksw_used)*pagesize)/1024)/1024;
        swapfree=swaptotal-swapused;
#endif


        if((xml_swap_stats=strf("<swap><total>%ld</total><used>%ld</used><free>%ld</free></swap>", swaptotal, swapused, swapfree)) == NULL){
                errf("strf failed (%m)");
                return NULL;
        }

        return xml_swap_stats;
}
Revision:	1.4
Committed:	Wed May 29 19:41:59 2002 UTC (22 years, 6 months ago) by tdb
Content type:	text/plain
Branch:	MAIN
CVS Tags:	IHOST_1_0_RC1
Changes since 1.3:	+4 -0 lines
Log Message:	This ihost now uses autoconf and automake to make a "normal" installation and distribution ;) It's now far easier to compile. To build from CVS :- aclocal autoheader autoconf automake -a -c Then for compiling (end users will only need to do this) :- ./configure make make install To build a distribution :- make dist
#	User	Rev	Content
1	tdb	1.2	/*
2			* i-scream central monitoring system
3	tdb	1.3	* http://www.i-scream.org.uk
4	tdb	1.2	* Copyright (C) 2000-2002 i-scream
5			*
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	tdb	1.4	#ifdef HAVE_CONFIG_H
22			#include "config.h"
23			#endif
24
25	pajs	1.1	#include <stdio.h>
26			#include "ukcprog.h"
27			#ifdef SOLARIS
28			#include <sys/stat.h>
29			#include <sys/swap.h>
30			#include <unistd.h>
31			#endif
32			#ifdef LINUX
33			#include <string.h>
34			#endif
35			#ifdef FREEBSD
36			#include <sys/types.h>
37			#include <pwd.h>
38			#include <unistd.h>
39			#include <fcntl.h>
40			#include <kvm.h>
41			#include <limits.h>
42			#include <grp.h>
43			#endif
44
45			char *get_swap_stats(){
46			char *xml_swap_stats;
47			long swaptotal=0;
48			long swapfree=0;
49			long swapused=0;
50			#ifdef SOLARIS
51			struct anoninfo ai;
52			int pagesize;
53			#endif
54			#ifdef LINUX
55			char *line;
56			FILE *f;
57			#endif
58			#ifdef FREEBSD
59			gid_t gid;
60			struct group *kmem_grp;
61			struct kvm_swap swapinfo;
62			int pagesize;
63			kvm_t *kvmd = NULL;
64			char errbuf[_POSIX2_LINE_MAX];
65			#endif
66
67			#ifdef SOLARIS
68			if((pagesize=sysconf(_SC_PAGESIZE)) == -1){
69			errf("failed to get system pagesize (%m)");
70			return NULL;
71			}
72			if (swapctl(SC_AINFO, &ai) == -1) {
73			errf("failed to get swap stats (%m)");
74			return NULL;
75			}
76			swaptotal=((ai.ani_max/1024)*pagesize)/1024;
77			swapused=((ai.ani_resv/1024)*pagesize)/1024;
78			swapfree=swaptotal-swapused;
79			#endif
80			#ifdef LINUX
81			if ((f=fopen("/proc/meminfo", "r" ))==NULL) {
82			errf("Failed to open memory stats (%m)");
83			return NULL;
84			}
85			while((line=fpgetline(f)) != NULL){
86			if (((strncmp(line,"Swap: ",6)) == 0)) {
87			if((sscanf(line, "%*s %ld %ld %ld", &swaptotal, &swapused, &swapfree)) != 3){
88			errf("Failed to read swap details (%m)");
89			return NULL;
90			}
91			break;
92			}
93			}
94			if ((fclose(f)) != 0) {
95			errf("Failed to close file (%m)");
96			return NULL;
97			}
98			swaptotal=(swaptotal/1024)/1024;
99			swapused=(swapused/1024)/1024;
100			swapfree=(swapfree/1024)/1024;
101			#endif
102			#ifdef FREEBSD
103			/* To do this, this has to be setgid kmem, or be run as root :(
104			*/
105			#define MEM_GROUP "kmem"
106			if((kmem_grp=getgrnam(MEM_GROUP))==NULL){
107			errf("Failed to find gid for kmem (%m)");
108			return NULL;
109			}
110			gid=getgid();
111			if((setegid(kmem_grp->gr_gid))!=0){
112			errf("Failed to become gid kmem (%m)\nCan not get swap info.");
113			return NULL;
114			}
115			if((kvmd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, errbuf)) == NULL){
116			errf("Failed to open kvm info to get swap stats (%m)");
117			return NULL;
118			}
119			if ((kvm_getswapinfo(kvmd, &swapinfo, 1,0)) == -1){
120			errf("Failed to get swap info (%m)");
121			return NULL;
122			}
123			if((kvm_close(kvmd))!=0){
124			errf("Failed to close kvm (%m)");
125			return NULL;
126			}
127			if((setegid(gid))!=0){
128			errf("Failed to lose gid kmem (%m)");
129			exit(1);
130			return NULL;
131			}
132			pagesize=getpagesize();
133			swaptotal=((((long)swapinfo.ksw_total)*pagesize)/1024)/1024;
134			swapused=((((long)swapinfo.ksw_used)*pagesize)/1024)/1024;
135			swapfree=swaptotal-swapused;
136			#endif
137
138
139
140			if((xml_swap_stats=strf("<swap><total>%ld</total><used>%ld</used><free>%ld</free></swap>", swaptotal, swapused, swapfree)) == NULL){
141			errf("strf failed (%m)");
142			return NULL;
143			}
144
145			return xml_swap_stats;
146			}