1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/*
KSysGuard, the KDE System Guard
Copyright (c) 1999, 2000 Chris Schlaeger <cs@kde.org>
Solaris support by Torsten Kasch <tk@Genetik.Uni-Bielefeld.DE>
This program is free software; you can redistribute it and/or
modify it under the terms of version 2 of the GNU General Public
License as published by the Free Software Foundation.
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/swap.h>
#include "config.h"
#ifdef HAVE_KSTAT
#include <kstat.h>
#endif
#include "ksysguardd.h"
#include "Command.h"
#include "Memory.h"
static int Dirty = 1;
static t_memsize totalmem = (t_memsize) 0;
static t_memsize freemem = (t_memsize) 0;
static long totalswap = 0L;
static long freeswap = 0L;
/*
* this is borrowed from top's m_sunos5 module
* used by permission from William LeFebvre
*/
static int pageshift;
static long (*p_pagetok) ();
#define pagetok(size) ((*p_pagetok)(size))
long pagetok_none( long size ) {
return( size );
}
long pagetok_left( long size ) {
return( size << pageshift );
}
long pagetok_right( long size ) {
return( size >> pageshift );
}
void initMemory( struct SensorModul* sm ) {
long i = sysconf( _SC_PAGESIZE );
pageshift = 0;
while( (i >>= 1) > 0 )
pageshift++;
/* calculate an amount to shift to K values */
/* remember that log base 2 of 1024 is 10 (i.e.: 2^10 = 1024) */
pageshift -= 10;
/* now determine which pageshift function is appropriate for the
result (have to because x << y is undefined for y < 0) */
if( pageshift > 0 ) {
/* this is the most likely */
p_pagetok = pagetok_left;
} else if( pageshift == 0 ) {
p_pagetok = pagetok_none;
} else {
p_pagetok = pagetok_right;
pageshift = -pageshift;
}
#ifdef HAVE_KSTAT
registerMonitor( "mem/physical/free", "integer",
printMemFree, printMemFreeInfo, sm );
registerMonitor( "mem/physical/used", "integer",
printMemUsed, printMemUsedInfo, sm );
#endif
registerMonitor( "mem/swap/free", "integer",
printSwapFree, printSwapFreeInfo, sm );
registerMonitor( "mem/swap/used", "integer",
printSwapUsed, printSwapUsedInfo, sm );
}
void exitMemory( void ) {
}
int updateMemory( void ) {
struct swaptable *swt;
struct swapent *ste;
int i;
int ndevs;
long swaptotal;
long swapfree;
char dummy[128];
#ifdef HAVE_KSTAT
kstat_ctl_t *kctl;
kstat_t *ksp;
kstat_named_t *kdata;
#endif /* HAVE_KSTAT */
if( (ndevs = swapctl( SC_GETNSWP, NULL )) < 1 )
return( 0 );
if( (swt = (struct swaptable *) malloc(
sizeof( int )
+ ndevs * sizeof( struct swapent ))) == NULL )
return( 0 );
/*
* fill in the required fields and retrieve the info thru swapctl()
*/
swt->swt_n = ndevs;
ste = &(swt->swt_ent[0]);
for( i = 0; i < ndevs; i++ ) {
/*
* since we'renot interested in the path(s),
* we'll re-use the same buffer
*/
ste->ste_path = dummy;
ste++;
}
swapctl( SC_LIST, swt );
swaptotal = swapfree = 0L;
ste = &(swt->swt_ent[0]);
for( i = 0; i < ndevs; i++ ) {
if( (! (ste->ste_flags & ST_INDEL))
&& (! (ste->ste_flags & ST_DOINGDEL)) ) {
swaptotal += ste->ste_pages;
swapfree += ste->ste_free;
}
ste++;
}
free( swt );
totalswap = pagetok( swaptotal );
freeswap = pagetok( swapfree );
#ifdef HAVE_KSTAT
/*
* get a kstat handle and update the user's kstat chain
*/
if( (kctl = kstat_open()) == NULL )
return( 0 );
while( kstat_chain_update( kctl ) != 0 )
;
totalmem = pagetok( sysconf( _SC_PHYS_PAGES ));
/*
* traverse the kstat chain to find the appropriate statistics
*/
if( (ksp = kstat_lookup( kctl, "unix", 0, "system_pages" )) == NULL )
return( 0 );
if( kstat_read( kctl, ksp, NULL ) == -1 )
return( 0 );
/*
* lookup the data
*/
kdata = (kstat_named_t *) kstat_data_lookup( ksp, "freemem" );
if( kdata != NULL )
freemem = pagetok( kdata->value.ui32 );
kstat_close( kctl );
#endif /* ! HAVE_KSTAT */
Dirty = 0;
return( 0 );
}
void printMemFreeInfo( const char *cmd ) {
if( Dirty )
updateMemory();
fprintf(CurrentClient, "Free Memory\t0\t%ld\tKB\n", totalmem );
}
void printMemFree( const char *cmd ) {
if( Dirty )
updateMemory();
fprintf(CurrentClient, "%ld\n", freemem );
}
void printMemUsedInfo( const char *cmd ) {
if( Dirty )
updateMemory();
fprintf(CurrentClient, "Used Memory\t0\t%ld\tKB\n", totalmem );
}
void printMemUsed( const char *cmd ) {
if( Dirty )
updateMemory();
fprintf(CurrentClient, "%ld\n", totalmem - freemem );
}
void printSwapFreeInfo( const char *cmd ) {
if( Dirty )
updateMemory();
fprintf(CurrentClient, "Free Swap\t0\t%ld\tKB\n", totalswap );
}
void printSwapFree( const char *cmd ) {
if( Dirty )
updateMemory();
fprintf(CurrentClient, "%ld\n", freeswap );
}
void printSwapUsedInfo( const char *cmd ) {
if( Dirty )
updateMemory();
fprintf(CurrentClient, "Used Swap\t0\t%ld\tKB\n", totalswap );
}
void printSwapUsed( const char *cmd ) {
if( Dirty )
updateMemory();
fprintf(CurrentClient, "%ld\n", totalswap - freeswap );
}
|
