d1fe696a9b5558b645646f83b4496e4df831bf9a
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 "collectd.h"
25 #include "common.h"
26 #include "plugin.h"
28 #define MODULE_NAME "processes"
30 #ifdef KERNEL_LINUX
31 # define PROCESSES_HAVE_READ 1
32 #else
33 # define PROCESSES_HAVE_READ 0
34 #endif
36 static char *ps_file = "processes.rrd";
38 static char *ds_def[] =
39 {
40 "DS:running:GAUGE:25:0:65535",
41 "DS:sleeping:GAUGE:25:0:65535",
42 "DS:zombies:GAUGE:25:0:65535",
43 "DS:stopped:GAUGE:25:0:65535",
44 "DS:paging:GAUGE:25:0:65535",
45 "DS:blocked:GAUGE:25:0:65535",
46 NULL
47 };
48 static int ds_num = 6;
50 static void ps_init (void)
51 {
52 }
54 static void ps_write (char *host, char *inst, char *val)
55 {
56 rrd_update_file (host, ps_file, val, ds_def, ds_num);
57 }
59 #define BUFSIZE 256
60 static void ps_submit (unsigned int running,
61 unsigned int sleeping,
62 unsigned int zombies,
63 unsigned int stopped,
64 unsigned int paging,
65 unsigned int blocked)
66 {
67 char buf[BUFSIZE];
69 if (snprintf (buf, BUFSIZE, "%u:%u:%u:%u:%u:%u:%u",
70 (unsigned int) curtime,
71 running, sleeping, zombies, stopped, paging,
72 blocked) >= BUFSIZE)
73 return;
75 plugin_submit (MODULE_NAME, "-", buf);
76 }
78 #if PROCESSES_HAVE_READ
79 static void ps_read (void)
80 {
81 #ifdef KERNEL_LINUX
82 unsigned int running, sleeping, zombies, stopped, paging, blocked;
84 char buf[BUFSIZE];
85 char filename[20]; /* need 17 bytes */
86 char *fields[256];
88 struct dirent *ent;
89 DIR *proc;
90 FILE *fh;
92 running = sleeping = zombies = stopped = paging = blocked = 0;
94 if ((proc = opendir ("/proc")) == NULL)
95 {
96 syslog (LOG_ERR, "Cannot open `/proc': %s", strerror (errno));
97 return;
98 }
100 while ((ent = readdir (proc)) != NULL)
101 {
102 if (!isdigit (ent->d_name[0]))
103 continue;
105 if (snprintf (filename, 20, "/proc/%s/stat", ent->d_name) >= 20)
106 continue;
108 if ((fh = fopen (filename, "r")) == NULL)
109 {
110 syslog (LOG_ERR, "Cannot open `%s': %s", filename, strerror (errno));
111 continue;
112 }
114 if (fgets (buf, BUFSIZE, fh) == NULL)
115 {
116 fclose (fh);
117 continue;
118 }
120 fclose (fh);
122 if (strsplit (buf, fields, 256) < 3)
123 continue;
125 switch (fields[2][0])
126 {
127 case 'R': running++; break;
128 case 'S': sleeping++; break;
129 case 'D': blocked++; break;
130 case 'Z': zombies++; break;
131 case 'T': stopped++; break;
132 case 'W': paging++; break;
133 }
134 }
136 closedir(proc);
138 ps_submit (running, sleeping, zombies, stopped, paging, blocked);
139 #endif /* defined(KERNEL_LINUX) */
140 }
141 #else
142 # define ps_read NULL
143 #endif /* PROCESSES_HAVE_READ */
144 #undef BUFSIZE
146 void module_register (void)
147 {
148 plugin_register (MODULE_NAME, ps_init, ps_read, ps_write);
149 }
151 #undef MODULE_NAME