/**
* collectd - src/collectd.c
- * Copyright (C) 2005 Florian octo Forster
+ * Copyright (C) 2005,2006 Florian octo Forster
*
* 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
**/
#include "collectd.h"
+#include "common.h"
+#include "utils_debug.h"
-#include "multicast.h"
+#include "network.h"
#include "plugin.h"
#include "configfile.h"
-#include "ping.h"
-
static int loop = 0;
-#ifdef HAVE_LIBKSTAT
+#if HAVE_LIBKSTAT
kstat_ctl_t *kc;
#endif /* HAVE_LIBKSTAT */
-#if COLLECT_PING
-char *pinghosts[MAX_PINGHOSTS];
-int num_pinghosts = 0;
-#endif
-
/*
* exported variables
*/
time_t curtime;
+int operating_mode;
-#ifdef HAVE_LIBRRD
-int operating_mode;
-#endif
+static void sigIntHandler (int signal)
+{
+ loop++;
+}
-void sigIntHandler (int signal)
+static void sigTermHandler (int signal)
{
loop++;
}
-int change_basedir (char *dir)
+static int change_basedir (char *dir)
{
int dirlen = strlen (dir);
{
if (mkdir (dir, 0755) == -1)
{
- syslog (LOG_ERR, "mkdir: %s", strerror (errno));
+ syslog (LOG_ERR, "mkdir (%s): %s", dir, strerror (errno));
return (-1);
}
else if (chdir (dir) == -1)
{
- syslog (LOG_ERR, "chdir: %s", strerror (errno));
+ syslog (LOG_ERR, "chdir (%s): %s", dir, strerror (errno));
return (-1);
}
}
}
return (0);
-}
+} /* static int change_basedir (char *dir) */
-#ifdef HAVE_LIBKSTAT
-void update_kstat (void)
+#if HAVE_LIBKSTAT
+static void update_kstat (void)
{
if (kc == NULL)
{
}
return;
-}
+} /* static void update_kstat (void) */
#endif /* HAVE_LIBKSTAT */
-void exit_usage (char *name)
+/* TODO
+ * Remove all settings but `-f' and `-C'
+ */
+static void exit_usage (char *name)
{
- printf ("Usage: %s [OPTIONS]\n\n"
+ printf ("Usage: "PACKAGE" [OPTIONS]\n\n"
"Available options:\n"
" General:\n"
- " -d <dir> Base directory to use.\n"
- " Default: %s\n"
- " -P <dir> Set the plugin-directory\n"
- " Default: %s\n"
- " -f Don't fork to the background\n"
-#ifdef HAVE_LIBRRD
- " -l Start in local mode (no network)\n"
- " -c Start in client (sender) mode\n"
- " -s Start in server (listener) mode\n"
-#endif /* HAVE_LIBRRD */
-#if COLLECT_PING
- " Ping:\n"
- " -p <host> Host to ping periodically, may be repeated to ping\n"
- " more than one host.\n"
-#endif /* COLLECT_PING */
- "\n%s %s, http://verplant.org/collectd/\n"
+ " -C <file> Configuration file.\n"
+ " Default: "CONFIGFILE"\n"
+#if COLLECT_DAEMON
+ " -f Don't fork to the background.\n"
+#endif
+ "\nBuiltin defaults:\n"
+ " Config-File "CONFIGFILE"\n"
+ " PID-File "PIDFILE"\n"
+ " Data-Directory "PKGLOCALSTATEDIR"\n"
+#if COLLECT_DEBUG
+ " Log-File "LOGFILE"\n"
+#endif
+ " Step "COLLECTD_STEP" seconds\n"
+ " Heartbeat "COLLECTD_HEARTBEAT" seconds\n"
+ "\n"PACKAGE" "VERSION", http://collectd.org/\n"
"by Florian octo Forster <octo@verplant.org>\n"
- "for contributions see `AUTHORS'\n",
- PACKAGE, DATADIR, PLUGINDIR, PACKAGE, VERSION);
+ "for contributions see `AUTHORS'\n");
exit (0);
-}
+} /* static void exit_usage (char *name) */
-int start_client (void)
+static int start_client (void)
{
- int sleepingtime;
+ int step;
+
+ struct timeval tv_now;
+ struct timeval tv_next;
+ struct timespec ts_wait;
-#ifdef HAVE_LIBKSTAT
+ step = atoi (COLLECTD_STEP);
+ if (step <= 0)
+ step = 10;
+
+#if HAVE_LIBKSTAT
kc = NULL;
update_kstat ();
#endif
-#ifdef HAVE_LIBSTATGRAB
+#if HAVE_LIBSTATGRAB
if (sg_init ())
{
syslog (LOG_ERR, "sg_init: %s", sg_str_error (sg_get_error ()));
while (loop == 0)
{
- curtime = time (NULL);
-#ifdef HAVE_LIBKSTAT
+ if (gettimeofday (&tv_next, NULL) < 0)
+ {
+ syslog (LOG_ERR, "gettimeofday failed: %s", strerror (errno));
+ return (-1);
+ }
+ tv_next.tv_sec += step;
+
+#if HAVE_LIBKSTAT
update_kstat ();
#endif
+ /* `curtime' is used by many (all?) plugins as the
+ * data-sample-time passed to RRDTool */
+ curtime = time (NULL);
+
+ /* Issue all plugins */
plugin_read_all ();
- sleepingtime = 10;
- while (sleepingtime != 0)
+ if (gettimeofday (&tv_now, NULL) < 0)
+ {
+ syslog (LOG_ERR, "gettimeofday failed: %s", strerror (errno));
+ return (-1);
+ }
+
+ if (timeval_sub_timespec (&tv_next, &tv_now, &ts_wait) != 0)
{
- if (loop != 0)
+ syslog (LOG_WARNING, "Not sleeping because `timeval_sub_timespec' returned non-zero!");
+ continue;
+ }
+
+ while (nanosleep (&ts_wait, &ts_wait) == -1)
+ {
+ if (errno != EINTR)
+ {
+ syslog (LOG_ERR, "nanosleep failed: %s", strerror (errno));
break;
- sleepingtime = sleep (sleepingtime);
+ }
}
}
return (0);
-}
+} /* static int start_client (void) */
-#ifdef HAVE_LIBRRD
-int start_server (void)
+#if HAVE_LIBRRD
+static int start_server (void)
{
char *host;
char *type;
char *instance;
char *values;
- while (loop == 0)
+ int error_counter = 0;
+ int status;
+
+ while ((loop == 0) && (error_counter < 3))
{
- if (multicast_receive (&host, &type, &instance, &values) == 0)
- plugin_write (host, type, instance, values);
+ status = network_receive (&host, &type, &instance, &values);
+
+ if (status != 0)
+ {
+ if (status < 0)
+ error_counter++;
+ continue;
+ }
+ error_counter = 0;
+
+ plugin_write (host, type, instance, values);
if (host != NULL) free (host); host = NULL;
if (type != NULL) free (type); type = NULL;
}
return (0);
-}
+} /* static int start_server (void) */
#endif /* HAVE_LIBRRD */
-int pidfile_create (void)
+#if COLLECT_DAEMON
+static int pidfile_create (const char *file)
{
FILE *fh;
- if ((fh = fopen (PIDFILE, "w")) == NULL)
+ if (file == NULL)
+ file = PIDFILE;
+
+ if ((fh = fopen (file, "w")) == NULL)
{
- syslog (LOG_ERR, "fopen (pidfile): %s", strerror (errno));
+ syslog (LOG_ERR, "fopen (%s): %s", file, strerror (errno));
return (1);
}
- fprintf (fh, "%d\n", getpid());
+ fprintf (fh, "%i\n", (int) getpid ());
fclose(fh);
return (0);
-}
+} /* static int pidfile_create (const char *file) */
+#endif /* COLLECT_DAEMON */
-int pidfile_remove (void)
+#if COLLECT_DAEMON
+static int pidfile_remove (const char *file)
{
- return (unlink (PIDFILE));
-}
+ if (file == NULL) {
+ file = PIDFILE;
+ }
+ return (unlink (file));
+} /* static int pidfile_remove (const char *file) */
+#endif /* COLLECT_DAEMON */
int main (int argc, char **argv)
{
- struct sigaction sigIntAction, sigChldAction;
+ struct sigaction sigIntAction;
+ struct sigaction sigTermAction;
+ char *datadir = PKGLOCALSTATEDIR;
+ char *configfile = CONFIGFILE;
#if COLLECT_DAEMON
+ struct sigaction sigChldAction;
+ char *pidfile = PIDFILE;
pid_t pid;
+ int daemonize = 1;
+#endif
+#if COLLECT_DEBUG
+ char *logfile = LOGFILE;
#endif
- char *plugindir = NULL;
- char *basedir = DATADIR;
- char *configfile = NULL;
-
- int daemonize = 1;
-
-#ifdef HAVE_LIBRRD
+#if HAVE_LIBRRD
operating_mode = MODE_LOCAL;
+#else
+ operating_mode = MODE_CLIENT;
#endif
-
- /*
- * open syslog
- */
+
+ /* open syslog */
openlog (PACKAGE, LOG_CONS | LOG_PID, LOG_DAEMON);
- /*
- * read options
- */
+ /* read options */
while (1)
{
int c;
- c = getopt (argc, argv, "d:fP:h"
-#if HAVE_LIBRRD
- "csl"
-#endif /* HAVE_LIBRRD */
-#if COLLECT_PING
- "p:"
-#endif /* COLLECT_PING */
+ c = getopt (argc, argv, "hC:"
+#if COLLECT_DAEMON
+ "f"
+#endif
);
if (c == -1)
switch (c)
{
-#ifdef HAVE_LIBRRD
- case 'c':
- operating_mode = MODE_CLIENT;
- break;
-
- case 's':
- operating_mode = MODE_SERVER;
- break;
-
- case 'l':
- operating_mode = MODE_LOCAL;
- break;
-#endif /* HAVE_LIBRRD */
- case 'd':
- basedir = optarg;
+ case 'C':
+ configfile = optarg;
break;
+#if COLLECT_DAEMON
case 'f':
daemonize = 0;
break;
-#if COLLECT_PING
- case 'p':
- if (num_pinghosts < MAX_PINGHOSTS)
- pinghosts[num_pinghosts++] = optarg;
- else
- fprintf (stderr, "Maximum of %i ping hosts reached.\n", MAX_PINGHOSTS);
- break;
-#endif /* COLLECT_PING */
- case 'P':
- plugindir = optarg;
- break;
-
+#endif /* COLLECT_DAEMON */
case 'h':
default:
exit_usage (argv[0]);
- }
-
- }
+ } /* switch (c) */
+ } /* while (1) */
+
+#if COLLECT_DEBUG
+ if ((logfile = cf_get_option ("LogFile", LOGFILE)) != NULL)
+ DBG_STARTFILE (logfile, "Debug file opened.");
+#endif
/*
- * Read the config file. This will load any modules automagically.
+ * Read options from the config file, the environment and the command
+ * line (in that order, with later options overwriting previous ones in
+ * general).
+ * Also, this will automatically load modules.
*/
- plugin_set_dir (plugindir);
-
if (cf_read (configfile))
{
fprintf (stderr, "Error: Reading the config file failed!\n"
* Change directory. We do this _after_ reading the config and loading
* modules to relative paths work as expected.
*/
- if (change_basedir (basedir))
+ if ((datadir = cf_get_option ("DataDir", PKGLOCALSTATEDIR)) == NULL)
{
- fprintf (stderr, "Error: Unable to change to directory `%s'.\n", basedir);
+ fprintf (stderr, "Don't have a datadir to use. This should not happen. Ever.");
+ return (1);
+ }
+ if (change_basedir (datadir))
+ {
+ fprintf (stderr, "Error: Unable to change to directory `%s'.\n", datadir);
return (1);
}
+#if COLLECT_DAEMON
/*
- * install signal handlers
+ * fork off child
*/
- sigIntAction.sa_handler = sigIntHandler;
- sigaction (SIGINT, &sigIntAction, NULL);
-
sigChldAction.sa_handler = SIG_IGN;
sigaction (SIGCHLD, &sigChldAction, NULL);
- /*
- * fork off child
- */
-#if COLLECT_DAEMON
+ if ((pidfile = cf_get_option ("PIDFile", PIDFILE)) == NULL)
+ {
+ fprintf (stderr, "Cannot obtain pidfile. This shoud not happen. Ever.");
+ return (1);
+ }
+
if (daemonize)
{
if ((pid = fork ()) == -1)
setsid ();
/* Write pidfile */
- if (pidfile_create ())
+ if (pidfile_create (pidfile))
exit (2);
/* close standard descriptors */
#endif /* COLLECT_DAEMON */
/*
+ * install signal handlers
+ */
+ sigIntAction.sa_handler = sigIntHandler;
+ sigaction (SIGINT, &sigIntAction, NULL);
+
+ sigTermAction.sa_handler = sigTermHandler;
+ sigaction (SIGTERM, &sigTermAction, NULL);
+
+ /*
* run the actual loops
*/
-#ifdef HAVE_LIBRRD
+#if HAVE_LIBRRD
if (operating_mode == MODE_SERVER)
start_server ();
- else /* if (operating_mode == MODE_CLIENT || operating_mode == MODE_LOCAL) */
+ else /* if (operating_mode == MODE_CLIENT || operating_mode == MODE_LOCAL || operating_mode == MODE_LOG) */
#endif
start_client ();
- /*
- * close syslog
- */
+#if COLLECT_DEBUG
+ if (logfile != NULL)
+ DBG_STOPFILE("debug file closed.");
+#endif
+
+ /* close syslog */
syslog (LOG_INFO, "Exiting normally");
closelog ();
+#if COLLECT_DAEMON
if (daemonize)
- pidfile_remove();
+ pidfile_remove (pidfile);
+#endif /* COLLECT_DAEMON */
return (0);
-}
+} /* int main (int argc, char **argv) */
projects / collectd.git / blobdiff