1 /**
2 * collectd - src/load.c
3 * Copyright (C) 2005-2007 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Florian octo Forster <octo at verplant.org>
20 **/
22 #include "collectd.h"
23 #include "common.h"
24 #include "plugin.h"
26 #ifdef HAVE_SYS_LOADAVG_H
27 #include <sys/loadavg.h>
28 #endif
30 #if HAVE_STATGRAB_H
31 # include <statgrab.h>
32 #endif
34 #ifdef HAVE_GETLOADAVG
35 #if !defined(LOADAVG_1MIN) || !defined(LOADAVG_5MIN) || !defined(LOADAVG_15MIN)
36 #define LOADAVG_1MIN 0
37 #define LOADAVG_5MIN 1
38 #define LOADAVG_15MIN 2
39 #endif
40 #endif /* defined(HAVE_GETLOADAVG) */
42 static void load_submit (gauge_t snum, gauge_t mnum, gauge_t lnum)
43 {
44 value_t values[3];
45 value_list_t vl = VALUE_LIST_INIT;
47 values[0].gauge = snum;
48 values[1].gauge = mnum;
49 values[2].gauge = lnum;
51 vl.values = values;
52 vl.values_len = STATIC_ARRAY_SIZE (values);
53 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
54 sstrncpy (vl.plugin, "load", sizeof (vl.plugin));
55 sstrncpy (vl.type, "load", sizeof (vl.type));
57 plugin_dispatch_values (&vl);
58 }
60 static int load_read (void)
61 {
62 #if defined(HAVE_GETLOADAVG)
63 double load[3];
65 if (getloadavg (load, 3) == 3)
66 load_submit (load[LOADAVG_1MIN], load[LOADAVG_5MIN], load[LOADAVG_15MIN]);
67 else
68 {
69 char errbuf[1024];
70 WARNING ("load: getloadavg failed: %s",
71 sstrerror (errno, errbuf, sizeof (errbuf)));
72 }
73 /* #endif HAVE_GETLOADAVG */
75 #elif defined(KERNEL_LINUX)
76 gauge_t snum, mnum, lnum;
77 FILE *loadavg;
78 char buffer[16];
80 char *fields[8];
81 int numfields;
83 if ((loadavg = fopen ("/proc/loadavg", "r")) == NULL)
84 {
85 char errbuf[1024];
86 WARNING ("load: fopen: %s",
87 sstrerror (errno, errbuf, sizeof (errbuf)));
88 return (-1);
89 }
91 if (fgets (buffer, 16, loadavg) == NULL)
92 {
93 char errbuf[1024];
94 WARNING ("load: fgets: %s",
95 sstrerror (errno, errbuf, sizeof (errbuf)));
96 fclose (loadavg);
97 return (-1);
98 }
100 if (fclose (loadavg))
101 {
102 char errbuf[1024];
103 WARNING ("load: fclose: %s",
104 sstrerror (errno, errbuf, sizeof (errbuf)));
105 }
107 numfields = strsplit (buffer, fields, 8);
109 if (numfields < 3)
110 return (-1);
112 snum = atof (fields[0]);
113 mnum = atof (fields[1]);
114 lnum = atof (fields[2]);
116 load_submit (snum, mnum, lnum);
117 /* #endif KERNEL_LINUX */
119 #elif HAVE_LIBSTATGRAB
120 gauge_t snum, mnum, lnum;
121 sg_load_stats *ls;
123 if ((ls = sg_get_load_stats ()) == NULL)
124 return;
126 snum = ls->min1;
127 mnum = ls->min5;
128 lnum = ls->min15;
130 load_submit (snum, mnum, lnum);
131 /* #endif HAVE_LIBSTATGRAB */
133 #else
134 # error "No applicable input method."
135 #endif
137 return (0);
138 }
140 void module_register (void)
141 {
142 plugin_register_read ("load", load_read);
143 } /* void module_register */