1 /**
2 * collectd - src/processes.c
3 * Copyright (C) 2005 Lyonel Vincent
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; either version 2 of the License, or (at your
8 * option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18 *
19 * Authors:
20 * Lyonel Vincent <lyonel at ezix.org>
21 * Florian octo Forster <octo at verplant.org>
22 **/
24 #include "processes.h"
26 #if COLLECT_PROCESSES
27 #define MODULE_NAME "processes"
29 #include "common.h"
30 #include "plugin.h"
32 static char *ps_file = "processes.rrd";
34 static char *ds_def[] =
35 {
36 "DS:running:GAUGE:25:0:65535",
37 "DS:sleeping:GAUGE:25:0:65535",
38 "DS:zombies:GAUGE:25:0:65535",
39 "DS:stopped:GAUGE:25:0:65535",
40 "DS:paging:GAUGE:25:0:65535",
41 "DS:blocked:GAUGE:25:0:65535",
42 NULL
43 };
44 static int ds_num = 6;
46 extern time_t curtime;
48 void ps_init (void)
49 {
50 }
52 void ps_write (char *host, char *inst, char *val)
53 {
54 rrd_update_file (host, ps_file, val, ds_def, ds_num);
55 }
57 #define BUFSIZE 256
58 void ps_submit (unsigned int running,
59 unsigned int sleeping,
60 unsigned int zombies,
61 unsigned int stopped,
62 unsigned int paging,
63 unsigned int blocked)
64 {
65 char buf[BUFSIZE];
67 if (snprintf (buf, BUFSIZE, "%u:%u:%u:%u:%u:%u:%u",
68 (unsigned int) curtime,
69 running, sleeping, zombies, stopped, paging,
70 blocked) >= BUFSIZE)
71 return;
73 plugin_submit (MODULE_NAME, "-", buf);
74 }
76 void ps_read (void)
77 {
78 #ifdef KERNEL_LINUX
79 unsigned int running, sleeping, zombies, stopped, paging, blocked;
81 char buf[BUFSIZE];
82 char filename[20]; /* need 17 bytes */
83 char *fields[256];
85 struct dirent *ent;
86 DIR *proc;
87 FILE *fh;
89 running = sleeping = zombies = stopped = paging = blocked = 0;
91 if ((proc = opendir ("/proc")) == NULL)
92 {
93 syslog (LOG_ERR, "Cannot open `/proc': %s", strerror (errno));
94 return;
95 }
97 int strsplit (char *string, char **fields, size_t size);
99 while ((ent = readdir (proc)) != NULL)
100 {
101 if (!isdigit (ent->d_name[0]))
102 continue;
104 if (snprintf (filename, 20, "/proc/%s/stat", ent->d_name) >= 20)
105 continue;
107 if ((fh = fopen (filename, "r")) == NULL)
108 {
109 syslog (LOG_ERR, "Cannot open `%s': %s", filename, strerror (errno));
110 continue;
111 }
113 if (fgets (buf, BUFSIZE, fh) == NULL)
114 {
115 fclose (fh);
116 continue;
117 }
119 fclose (fh);
121 if (strsplit (buf, fields, 256) < 3)
122 continue;
124 switch (fields[2][0])
125 {
126 case 'R': running++; break;
127 case 'S': sleeping++; break;
128 case 'D': blocked++; break;
129 case 'Z': zombies++; break;
130 case 'T': stopped++; break;
131 case 'W': paging++; break;
132 }
133 }
135 closedir(proc);
137 ps_submit (running, sleeping, zombies, stopped, paging, blocked);
138 #endif /* defined(KERNEL_LINUX) */
139 }
140 #undef BUFSIZE
142 void module_register (void)
143 {
144 plugin_register (MODULE_NAME, ps_init, ps_read, ps_write);
145 }
147 #undef MODULE_NAME
148 #endif /* COLLECT_PROCESSES */