4 * users plugin for collectd
6 * This plugin collects the number of users currently logged into the system.
8 * Written by Sebastian Harl <sh@tokkee.org>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
28 #define MODULE_NAME "users"
35 static char *rrd_file = "users.rrd";
37 static char *ds_def[] = {
38 "DS:users:GAUGE:25:0:65535",
41 static int ds_num = 1;
43 extern time_t curtime;
47 /* we have nothing to do here :-) */
53 unsigned int users = 0;
54 unsigned int root = 0;
55 struct utmp *entry = NULL;
57 /* according to the *utent(3) man page none of the functions sets errno in
58 * case of an error, so we cannot do any error-checking here */
61 while (NULL != (entry = getutent()))
62 if (USER_PROCESS == entry->ut_type)
70 /* I don't like this temporary macro definition - well it's used everywhere
71 * else in the collectd-sources, so I will just stick with it... */
73 void users_submit(users)
76 char buf[BUFSIZE] = "";
78 if (snprintf(buf, BUFSIZE, "%u:%u",
79 (unsigned int)curtime,
83 plugin_submit(MODULE_NAME, NULL, buf);
88 void users_write(host, inst, val)
93 rrd_update_file(host, rrd_file, val, ds_def, ds_num);
97 void module_register(void)
99 plugin_register(MODULE_NAME, users_init, users_read, users_write);
104 #endif /* COLLECT_USERS */