/**
* collectd - src/collectd.c
- * Copyright (C) 2005,2006 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 "utils_debug.h"
-#include "network.h"
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+
#include "plugin.h"
#include "configfile.h"
-static int loop = 0;
-
+/*
+ * Global variables
+ */
+char hostname_g[DATA_MAX_NAME_LEN];
+int interval_g;
#if HAVE_LIBKSTAT
kstat_ctl_t *kc;
#endif /* HAVE_LIBKSTAT */
-/*
- * exported variables
- */
-time_t curtime;
-int operating_mode;
+static int loop = 0;
static void sigIntHandler (int signal)
{
loop++;
}
-static int change_basedir (char *dir)
+static int init_hostname (void)
+{
+ const char *str;
+
+ struct addrinfo ai_hints;
+ struct addrinfo *ai_list;
+ struct addrinfo *ai_ptr;
+ int status;
+
+ str = global_option_get ("Hostname");
+ if (str != NULL)
+ {
+ strncpy (hostname_g, str, sizeof (hostname_g));
+ hostname_g[sizeof (hostname_g) - 1] = '\0';
+ return (0);
+ }
+
+ if (gethostname (hostname_g, sizeof (hostname_g)) != 0)
+ {
+ fprintf (stderr, "`gethostname' failed and no "
+ "hostname was configured.\n");
+ return (-1);
+ }
+
+ str = global_option_get ("FQDNLookup");
+ if ((strcasecmp ("false", str) == 0)
+ || (strcasecmp ("no", str) == 0)
+ || (strcasecmp ("off", str) == 0))
+ return (0);
+
+ memset (&ai_hints, '\0', sizeof (ai_hints));
+ ai_hints.ai_flags = AI_CANONNAME;
+
+ status = getaddrinfo (hostname_g, NULL, &ai_hints, &ai_list);
+ if (status != 0)
+ {
+ ERROR ("getaddrinfo failed.");
+ return (-1);
+ }
+
+ for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
+ {
+ if (ai_ptr->ai_canonname == NULL)
+ continue;
+
+ strncpy (hostname_g, ai_ptr->ai_canonname, sizeof (hostname_g));
+ hostname_g[sizeof (hostname_g) - 1] = '\0';
+ break;
+ }
+
+ freeaddrinfo (ai_list);
+ return (0);
+} /* int init_hostname */
+
+static int init_global_variables (void)
+{
+ const char *str;
+
+ 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);
+
+ if (init_hostname () != 0)
+ return (-1);
+ DEBUG ("hostname_g = %s;", hostname_g);
+
+ return (0);
+} /* int init_global_variables */
+
+static int change_basedir (const char *orig_dir)
{
- int dirlen = strlen (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): %s", dir, 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): %s", dir, 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);
}
}
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 */
}
/* TODO
* Remove all settings but `-f' and `-C'
*/
-static void exit_usage (char *name)
+static void exit_usage (void)
{
printf ("Usage: "PACKAGE" [OPTIONS]\n\n"
" General:\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"
#endif
" 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");
exit (0);
} /* static void exit_usage (char *name) */
-static int start_client (void)
+static int do_init (void)
{
- int step;
-
- struct timeval tv_now;
- struct timeval tv_next;
- struct timespec ts_wait;
-
- step = atoi (COLLECTD_STEP);
- if (step <= 0)
- step = 10;
-
#if HAVE_LIBKSTAT
kc = NULL;
update_kstat ();
#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
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)
{
if (gettimeofday (&tv_next, NULL) < 0)
{
- syslog (LOG_ERR, "gettimeofday failed: %s", strerror (errno));
+ char errbuf[1024];
+ ERROR ("gettimeofday failed: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
return (-1);
}
- tv_next.tv_sec += step;
+ tv_next.tv_sec += interval_g;
#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 ();
if (gettimeofday (&tv_now, NULL) < 0)
{
- syslog (LOG_ERR, "gettimeofday failed: %s", strerror (errno));
+ char errbuf[1024];
+ ERROR ("gettimeofday failed: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
return (-1);
}
if (timeval_sub_timespec (&tv_next, &tv_now, &ts_wait) != 0)
{
- syslog (LOG_WARNING, "Not sleeping because `timeval_sub_timespec' returned non-zero!");
+ WARNING ("Not sleeping because "
+ "`timeval_sub_timespec' returned "
+ "non-zero!");
continue;
}
- while (nanosleep (&ts_wait, &ts_wait) == -1)
+ while ((loop == 0) && (nanosleep (&ts_wait, &ts_wait) == -1))
{
if (errno != EINTR)
{
- syslog (LOG_ERR, "nanosleep failed: %s", strerror (errno));
- break;
+ char errbuf[1024];
+ ERROR ("nanosleep failed: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
+ return (-1);
}
}
- }
+ } /* while (loop == 0) */
+ DEBUG ("return (0);");
return (0);
-} /* static int start_client (void) */
+} /* int do_loop */
-#if HAVE_LIBRRD
-static int start_server (void)
+static int do_shutdown (void)
{
- /* FIXME use stack here! */
- char *host;
- char *type;
- char *instance;
- char *values;
-
- while (loop == 0)
- {
- if (network_receive (&host, &type, &instance, &values) == 0)
- plugin_write (host, type, instance, values);
-
- 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;
- }
-
+ plugin_shutdown_all ();
return (0);
-} /* static int start_server (void) */
-#endif /* HAVE_LIBRRD */
+} /* int do_shutdown */
#if COLLECT_DAEMON
-static int pidfile_create (const char *file)
+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);
}
return (0);
} /* static int pidfile_create (const char *file) */
-#endif /* COLLECT_DAEMON */
-#if COLLECT_DAEMON
-static int pidfile_remove (const char *file)
+static int pidfile_remove (void)
{
- if (file == NULL) {
- file = 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 */
{
struct sigaction sigIntAction;
struct sigaction sigTermAction;
- char *datadir = PKGLOCALSTATEDIR;
char *configfile = CONFIGFILE;
+ int test_config = 0;
+ const char *basedir;
#if COLLECT_DAEMON
struct sigaction sigChldAction;
- char *pidfile = PIDFILE;
pid_t pid;
int daemonize = 1;
#endif
-#if COLLECT_DEBUG
- char *logfile = LOGFILE;
-#endif
-
-#if HAVE_LIBRRD
- operating_mode = MODE_LOCAL;
-#else
- operating_mode = MODE_CLIENT;
-#endif
-
- /* open syslog */
- openlog (PACKAGE, LOG_CONS | LOG_PID, LOG_DAEMON);
/* read options */
while (1)
{
int c;
- c = getopt (argc, argv, "hC:"
+ c = getopt (argc, argv, "htC:"
#if COLLECT_DAEMON
- "f"
+ "fP:"
#endif
);
case 'C':
configfile = optarg;
break;
+ case 't':
+ test_config = 1;
+ break;
#if COLLECT_DAEMON
+ case 'P':
+ global_option_set ("PIDFile", optarg);
+ break;
case 'f':
daemonize = 0;
break;
#endif /* COLLECT_DAEMON */
case 'h':
default:
- exit_usage (argv[0]);
+ exit_usage ();
} /* switch (c) */
} /* while (1) */
-#if COLLECT_DEBUG
- if ((logfile = cf_get_option ("LogFile", LOGFILE)) != NULL)
- DBG_STARTFILE (logfile, "Debug file opened.");
-#endif
-
/*
* Read options from the config file, the environment and the command
* line (in that order, with later options overwriting previous ones in
* Change directory. We do this _after_ reading the config and loading
* modules to relative paths work as expected.
*/
- if ((datadir = cf_get_option ("DataDir", PKGLOCALSTATEDIR)) == NULL)
+ if ((basedir = global_option_get ("BaseDir")) == NULL)
{
- fprintf (stderr, "Don't have a datadir to use. This should not happen. Ever.");
+ fprintf (stderr, "Don't have a basedir to use. This should not happen. Ever.");
return (1);
}
- if (change_basedir (datadir))
+ 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);
}
+ /*
+ * 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.
+ */
+ if (init_global_variables () != 0)
+ return (1);
+
+ if (test_config)
+ return (0);
+
#if COLLECT_DAEMON
/*
* fork off child
*/
+ memset (&sigChldAction, '\0', sizeof (sigChldAction));
sigChldAction.sa_handler = SIG_IGN;
sigaction (SIGCHLD, &sigChldAction, NULL);
- 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)
{
/* 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) */
/*
* 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
*/
-#if HAVE_LIBRRD
- if (operating_mode == MODE_SERVER)
- start_server ();
- else /* if (operating_mode == MODE_CLIENT || operating_mode == MODE_LOCAL || operating_mode == MODE_LOG) */
-#endif
- start_client ();
-
-#if COLLECT_DEBUG
- if (logfile != NULL)
- DBG_STOPFILE("debug file closed.");
-#endif
+ 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);
+ pidfile_remove ();
#endif /* COLLECT_DAEMON */
return (0);
-} /* int main (int argc, char **argv) */
+} /* int main */
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