-/*
- * users.c
+/**
+ * collectd - src/users.c
+ * Copyright (C) 2005,2006 Sebastian Harl
*
- * users plugin for collectd
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
*
- * This plugin collects the number of users currently logged into the system.
+ * 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.
*
- * Written by Sebastian Harl <sh@tokkee.org>
+ * 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-#include "users.h"
-
-#if COLLECT_USERS
-#define MODULE_NAME "users"
+ * Authors:
+ * Sebastian Harl <sh at tokkee.org>
+ **/
-#include "plugin.h"
+#include "collectd.h"
#include "common.h"
+#include "plugin.h"
-#include <utmp.h>
+#if HAVE_UTMPX_H
+# include <utmpx.h>
+#else /* !HAVE_UTMPX_H */
+# if HAVE_UTMP_H
+# include <utmp.h>
+# endif /* HAVE_UTMP_H */
+#endif /* HAVE_UTMPX_H */
-static char *rrd_file = "users.rrd";
+#define MODULE_NAME "users"
+
+#if HAVE_GETUTXENT || HAVE_GETUTENT
+# define USERS_HAVE_READ 1
+#else
+# define USERS_HAVE_READ 0
+#endif
-static char *ds_def[] = {
- "DS:users:GAUGE:25:0:65535",
- NULL
+static char *rrd_file = "users.rrd";
+static char *ds_def[] =
+{
+ "DS:users:GAUGE:"COLLECTD_HEARTBEAT":0:65535",
+ NULL
};
static int ds_num = 1;
-extern time_t curtime;
-
-void users_init(void)
+static void users_init (void)
{
- /* we have nothing to do here :-) */
- return;
-}
+ /* we have nothing to do here :-) */
+ return;
+} /* static void users_init(void) */
-void users_read(void)
+static void users_write (char *host, char *inst, char *val)
{
- unsigned int users = 0;
- unsigned int root = 0;
- struct utmp *entry = NULL;
-
- /* according to the *utent(3) man page none of the functions sets errno in
- * case of an error, so we cannot do any error-checking here */
- setutent();
-
- while (NULL != (entry = getutent()))
- if (USER_PROCESS == entry->ut_type)
- ++users;
- endutent();
-
- users_submit(users);
- return;
-}
+ rrd_update_file(host, rrd_file, val, ds_def, ds_num);
+ return;
+} /* static void users_write(char *host, char *inst, char *val) */
+#if USERS_HAVE_READ
/* I don't like this temporary macro definition - well it's used everywhere
- * else in the collectd-sources, so I will just stick with it... */
+ else in the collectd-sources, so I will just stick with it... */
#define BUFSIZE 256
-void users_submit(users)
- unsigned int users;
+static void users_submit (unsigned int users)
{
- char buf[BUFSIZE] = "";
+ char buf[BUFSIZE] = "";
- if (snprintf(buf, BUFSIZE, "%u:%u",
- (unsigned int)curtime,
- users) >= BUFSIZE)
- return;
+ if (snprintf(buf, BUFSIZE, "%u:%u",
+ (unsigned int)curtime, users) >= BUFSIZE)
+ {
+ return;
+ }
- plugin_submit(MODULE_NAME, NULL, buf);
- return;
-}
+ plugin_submit(MODULE_NAME, NULL, buf);
+ return;
+} /* static void users_submit(unsigned int users) */
#undef BUFSIZE
-void users_write(host, inst, val)
- char *host;
- char *inst;
- char *val;
+static void users_read (void)
{
- rrd_update_file(host, rrd_file, val, ds_def, ds_num);
- return;
-}
-
-void module_register(void)
+#if HAVE_GETUTXENT
+ unsigned int users = 0;
+ struct utmpx *entry = NULL;
+
+ /* according to the *utent(3) man page none of the functions sets errno
+ in case of an error, so we cannot do any error-checking here */
+ setutxent();
+
+ while (NULL != (entry = getutxent())) {
+ if (USER_PROCESS == entry->ut_type) {
+ ++users;
+ }
+ }
+ endutxent();
+
+ users_submit (users);
+/* #endif HAVE_GETUTXENT */
+
+#elif HAVE_GETUTENT
+ unsigned int users = 0;
+ struct utmp *entry = NULL;
+
+ /* according to the *utent(3) man page none of the functions sets errno
+ in case of an error, so we cannot do any error-checking here */
+ setutent();
+
+ while (NULL != (entry = getutent())) {
+ if (USER_PROCESS == entry->ut_type) {
+ ++users;
+ }
+ }
+ endutent();
+
+ users_submit(users);
+#endif /* HAVE_GETUTENT */
+
+ return;
+} /* static void users_read(void) */
+#else
+# define users_read NULL
+#endif /* USERS_HAVE_READ */
+
+void module_register (void)
{
- plugin_register(MODULE_NAME, users_init, users_read, users_write);
- return;
-}
-
-#undef MODULE_NAME
-#endif /* COLLECT_USERS */
-
+ plugin_register (MODULE_NAME, users_init, users_read, users_write);
+ return;
+} /* void module_register(void) */
projects / collectd.git / blobdiff