/**
* collectd - src/collectd.c
- * Copyright (C) 2005 Florian octo Forster
+ * Copyright (C) 2005-2007 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
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
+ * Free Software Foundation; only version 2 of the License is applicable.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
**/
#include "collectd.h"
+#include "common.h"
-#include "multicast.h"
#include "plugin.h"
+#include "configfile.h"
+#include "types_list.h"
-#include "ping.h"
-
-static int loop = 0;
-
-#ifdef HAVE_LIBKSTAT
+/*
+ * Global variables
+ */
+char hostname_g[DATA_MAX_NAME_LEN];
+int interval_g;
+#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;
+static int loop = 0;
-#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 init_global_variables (void)
{
- int dirlen = strlen (dir);
+ const char *str;
+
+ str = global_option_get ("Hostname");
+ if (str != NULL)
+ {
+ strncpy (hostname_g, str, sizeof (hostname_g));
+ }
+ else
+ {
+ if (gethostname (hostname_g, sizeof (hostname_g)) != 0)
+ {
+ fprintf (stderr, "`gethostname' failed and no "
+ "hostname was configured.\n");
+ return (-1);
+ }
+ }
+ DEBUG ("hostname_g = %s;", hostname_g);
+
+ str = global_option_get ("Interval");
+ if (str == NULL)
+ str = "10";
+ interval_g = atoi (str);
+ if (interval_g <= 0)
+ {
+ fprintf (stderr, "Cannot set the interval to a correct value.\n"
+ "Please check your settings.\n");
+ return (-1);
+ }
+ DEBUG ("interval_g = %i;", interval_g);
+
+ return (0);
+} /* int init_global_variables */
+
+static int change_basedir (const char *orig_dir)
+{
+ char *dir = strdup (orig_dir);
+ int dirlen;
+ int status;
+
+ if (dir == NULL)
+ {
+ char errbuf[1024];
+ ERROR ("strdup failed: %s",
+ sstrerror (errno, errbuf, sizeof (errbuf)));
+ return (-1);
+ }
+ dirlen = strlen (dir);
while ((dirlen > 0) && (dir[dirlen - 1] == '/'))
dir[--dirlen] = '\0';
if (dirlen <= 0)
return (-1);
- if (chdir (dir) == -1)
+ status = chdir (dir);
+ free (dir);
+
+ if (status != 0)
{
if (errno == ENOENT)
{
- if (mkdir (dir, 0755) == -1)
+ if (mkdir (orig_dir, 0755) == -1)
{
- syslog (LOG_ERR, "mkdir: %s", strerror (errno));
+ char errbuf[1024];
+ ERROR ("change_basedir: mkdir (%s): %s", orig_dir,
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
return (-1);
}
- else if (chdir (dir) == -1)
+ else if (chdir (orig_dir) == -1)
{
- syslog (LOG_ERR, "chdir: %s", strerror (errno));
+ char errbuf[1024];
+ ERROR ("chdir (%s): %s", orig_dir,
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
return (-1);
}
}
else
{
- syslog (LOG_ERR, "chdir: %s", strerror (errno));
+ char errbuf[1024];
+ ERROR ("chdir (%s): %s", orig_dir,
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
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)
{
if ((kc = kstat_open ()) == NULL)
- syslog (LOG_ERR, "Unable to open kstat control structure");
+ ERROR ("Unable to open kstat control structure");
}
else
{
kid = kstat_chain_update (kc);
if (kid > 0)
{
- syslog (LOG_INFO, "kstat chain has been updated");
+ INFO ("kstat chain has been updated");
plugin_init_all ();
}
else if (kid < 0)
- syslog (LOG_ERR, "kstat chain update failed");
+ ERROR ("kstat chain update failed");
/* else: everything works as expected */
}
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"
- /*
- " -C <dir> Configuration file.\n"
- " Default: %s\n"
- */
- " -P <file> PID File.\n"
- " Default: %s\n"
- " -M <dir> Module/Plugin directory.\n"
- " Default: %s\n"
- " -D <dir> Data storage directory.\n"
- " Default: %s\n"
+ " -C <file> Configuration file.\n"
+ " Default: "CONFIGFILE"\n"
+ " -P <file> PID-file.\n"
+ " Default: "PIDFILE"\n"
+#if COLLECT_DAEMON
" -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"
+#endif
+ "\nBuiltin defaults:\n"
+ " Config-File "CONFIGFILE"\n"
+ " PID-File "PIDFILE"\n"
+ " Data-Directory "PKGLOCALSTATEDIR"\n"
+ "\n"PACKAGE" "VERSION", http://collectd.org/\n"
"by Florian octo Forster <octo@verplant.org>\n"
- "for contributions see `AUTHORS'\n",
- PACKAGE, /* CONFIGFILE, */ PIDFILE, PLUGINDIR, PKGLOCALSTATEDIR, PACKAGE, VERSION);
+ "for contributions see `AUTHORS'\n");
exit (0);
-}
+} /* static void exit_usage (char *name) */
-int start_client (void)
+static int do_init (void)
{
- int sleepingtime;
-
-#ifdef HAVE_LIBKSTAT
+#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 ()));
+ ERROR ("sg_init: %s", sg_str_error (sg_get_error ()));
return (-1);
}
if (sg_drop_privileges ())
{
- syslog (LOG_ERR, "sg_drop_privileges: %s", sg_str_error (sg_get_error ()));
+ ERROR ("sg_drop_privileges: %s", sg_str_error (sg_get_error ()));
return (-1);
}
#endif
+ read_types_list ();
plugin_init_all ();
+ return (0);
+} /* int do_init () */
+
+
+static int do_loop (void)
+{
+ struct timeval tv_now;
+ struct timeval tv_next;
+ struct timespec ts_wait;
+
while (loop == 0)
{
- curtime = time (NULL);
-#ifdef HAVE_LIBKSTAT
+ if (gettimeofday (&tv_next, NULL) < 0)
+ {
+ char errbuf[1024];
+ ERROR ("gettimeofday failed: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
+ return (-1);
+ }
+ tv_next.tv_sec += interval_g;
+
+#if HAVE_LIBKSTAT
update_kstat ();
#endif
- plugin_read_all ();
- sleepingtime = 10;
- while (sleepingtime != 0)
+ /* Issue all plugins */
+ plugin_read_all (&loop);
+
+ if (gettimeofday (&tv_now, NULL) < 0)
{
- if (loop != 0)
- break;
- sleepingtime = sleep (sleepingtime);
+ char errbuf[1024];
+ ERROR ("gettimeofday failed: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
+ return (-1);
}
- }
- return (0);
-}
+ if (timeval_sub_timespec (&tv_next, &tv_now, &ts_wait) != 0)
+ {
+ WARNING ("Not sleeping because "
+ "`timeval_sub_timespec' returned "
+ "non-zero!");
+ continue;
+ }
-#ifdef HAVE_LIBRRD
-int start_server (void)
-{
- char *host;
- char *type;
- char *instance;
- char *values;
+ while ((loop == 0) && (nanosleep (&ts_wait, &ts_wait) == -1))
+ {
+ if (errno != EINTR)
+ {
+ char errbuf[1024];
+ ERROR ("nanosleep failed: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
+ return (-1);
+ }
+ }
+ } /* while (loop == 0) */
- while (loop == 0)
- {
- if (multicast_receive (&host, &type, &instance, &values) == 0)
- plugin_write (host, type, instance, values);
+ DEBUG ("return (0);");
+ return (0);
+} /* int do_loop */
- if (host != NULL) free (host); host = NULL;
- if (type != NULL) free (type); type = NULL;
- if (instance != NULL) free (instance); instance = NULL;
- if (values != NULL) free (values); values = NULL;
- }
-
+static int do_shutdown (void)
+{
+ plugin_shutdown_all ();
return (0);
-}
-#endif /* HAVE_LIBRRD */
+} /* int do_shutdown */
-int pidfile_create (char *file)
+#if COLLECT_DAEMON
+static int pidfile_create (void)
{
FILE *fh;
-
- if (file == NULL)
- file = PIDFILE;
+ const char *file = global_option_get ("PIDFile");
if ((fh = fopen (file, "w")) == NULL)
{
- syslog (LOG_ERR, "fopen (%s): %s", file, strerror (errno));
+ char errbuf[1024];
+ ERROR ("fopen (%s): %s", file,
+ sstrerror (errno, errbuf, sizeof (errbuf)));
return (1);
}
- fprintf (fh, "%d\n", getpid());
+ fprintf (fh, "%i\n", (int) getpid ());
fclose(fh);
return (0);
-}
+} /* static int pidfile_create (const char *file) */
-int pidfile_remove (void)
+static int pidfile_remove (void)
{
- return (unlink (PIDFILE));
-}
+ const char *file = global_option_get ("PIDFile");
+
+ DEBUG ("unlink (%s)", (file != NULL) ? file : "<null>");
+ 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 *configfile = CONFIGFILE;
+ int test_config = 0;
+ const char *basedir;
#if COLLECT_DAEMON
+ struct sigaction sigChldAction;
pid_t pid;
+ int daemonize = 1;
#endif
- char *configfile = CONFIGFILE;
- char *pidfile = PIDFILE;
- char *plugindir = PLUGINDIR;
- char *datadir = PKGLOCALSTATEDIR;
-
- int daemonize = 1;
-
-#ifdef HAVE_LIBRRD
- operating_mode = MODE_LOCAL;
-#endif
-
- /* open syslog */
- openlog (PACKAGE, LOG_CONS | LOG_PID, LOG_DAEMON);
-
/* read options */
while (1)
{
int c;
- c = getopt (argc, argv, "C:P:M:D:fh"
-#if HAVE_LIBRRD
- "csl"
-#endif /* HAVE_LIBRRD */
-#if COLLECT_PING
- "p:"
-#endif /* COLLECT_PING */
+ c = getopt (argc, argv, "htC:"
+#if COLLECT_DAEMON
+ "fP:"
+#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 'C':
configfile = optarg;
break;
- case 'P':
- pidfile = optarg;
- break;
- case 'M':
- plugindir = optarg;
+ case 't':
+ test_config = 1;
break;
- case 'D':
- datadir = optarg;
+#if COLLECT_DAEMON
+ case 'P':
+ global_option_set ("PIDFile", optarg);
break;
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 */
+#endif /* COLLECT_DAEMON */
case 'h':
default:
exit_usage (argv[0]);
- }
-
- }
+ } /* switch (c) */
+ } /* while (1) */
/*
- * Load plugins and change to output directory
- * Loading plugins is done first so relative paths work as expected..
+ * 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.
*/
- if (plugin_load_all (plugindir) < 1)
+ if (cf_read (configfile))
{
- fprintf (stderr, "Error: No plugins found.\n");
+ fprintf (stderr, "Error: Reading the config file failed!\n"
+ "Read the syslog for details.\n");
return (1);
}
- if (change_basedir (datadir))
+ /*
+ * Change directory. We do this _after_ reading the config and loading
+ * modules to relative paths work as expected.
+ */
+ if ((basedir = global_option_get ("BaseDir")) == NULL)
+ {
+ fprintf (stderr, "Don't have a basedir to use. This should not happen. Ever.");
+ return (1);
+ }
+ else if (change_basedir (basedir))
{
- fprintf (stderr, "Error: Unable to change to directory `%s'.\n", datadir);
+ fprintf (stderr, "Error: Unable to change to directory `%s'.\n", basedir);
return (1);
}
/*
- * install signal handlers
+ * Set global variables or, if that failes, exit. We cannot run with
+ * them being uninitialized. If nothing is configured, then defaults
+ * are being used. So this means that the user has actually done
+ * something wrong.
*/
- sigIntAction.sa_handler = sigIntHandler;
- sigaction (SIGINT, &sigIntAction, NULL);
+ if (init_global_variables () != 0)
+ return (1);
- sigChldAction.sa_handler = SIG_IGN;
- sigaction (SIGCHLD, &sigChldAction, NULL);
+ if (test_config)
+ return (0);
+#if COLLECT_DAEMON
/*
* fork off child
*/
-#if COLLECT_DAEMON
+ memset (&sigChldAction, '\0', sizeof (sigChldAction));
+ sigChldAction.sa_handler = SIG_IGN;
+ sigaction (SIGCHLD, &sigChldAction, NULL);
+
if (daemonize)
{
if ((pid = fork ()) == -1)
{
/* error */
- fprintf (stderr, "fork: %s", strerror (errno));
+ char errbuf[1024];
+ fprintf (stderr, "fork: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
return (1);
}
else if (pid != 0)
setsid ();
/* Write pidfile */
- if (pidfile_create (pidfile))
+ if (pidfile_create ())
exit (2);
/* close standard descriptors */
if (open ("/dev/null", O_RDWR) != 0)
{
- syslog (LOG_ERR, "Error: Could not connect `STDIN' to `/dev/null'");
+ ERROR ("Error: Could not connect `STDIN' to `/dev/null'");
return (1);
}
if (dup (0) != 1)
{
- syslog (LOG_ERR, "Error: Could not connect `STDOUT' to `/dev/null'");
+ ERROR ("Error: Could not connect `STDOUT' to `/dev/null'");
return (1);
}
if (dup (0) != 2)
{
- syslog (LOG_ERR, "Error: Could not connect `STDERR' to `/dev/null'");
+ ERROR ("Error: Could not connect `STDERR' to `/dev/null'");
return (1);
}
} /* if (daemonize) */
#endif /* COLLECT_DAEMON */
/*
+ * install signal handlers
+ */
+ memset (&sigIntAction, '\0', sizeof (sigIntAction));
+ sigIntAction.sa_handler = sigIntHandler;
+ sigaction (SIGINT, &sigIntAction, NULL);
+
+ memset (&sigTermAction, '\0', sizeof (sigTermAction));
+ sigTermAction.sa_handler = sigTermHandler;
+ sigaction (SIGTERM, &sigTermAction, NULL);
+
+ /*
* run the actual loops
*/
-#ifdef HAVE_LIBRRD
- if (operating_mode == MODE_SERVER)
- start_server ();
- else /* if (operating_mode == MODE_CLIENT || operating_mode == MODE_LOCAL) */
-#endif
- start_client ();
+ do_init ();
+ do_loop ();
/* close syslog */
- syslog (LOG_INFO, "Exiting normally");
- closelog ();
+ INFO ("Exiting normally");
+ do_shutdown ();
+
+#if COLLECT_DAEMON
if (daemonize)
- pidfile_remove();
+ pidfile_remove ();
+#endif /* COLLECT_DAEMON */
return (0);
-}
+} /* int main */