2 * RRDTool - src/rrd_daemon.c
3 * Copyright (C) 2008 Florian octo Forster
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 * Florian octo Forster <octo at verplant.org>
23 * First tell the compiler to stick to the C99 and POSIX standards as close as
26 #ifndef __STRICT_ANSI__ /* {{{ */
27 # define __STRICT_ANSI__
30 #ifndef _ISOC99_SOURCE
31 # define _ISOC99_SOURCE
34 #ifdef _POSIX_C_SOURCE
35 # undef _POSIX_C_SOURCE
37 #define _POSIX_C_SOURCE 200112L
39 /* Single UNIX needed for strdup. */
43 #define _XOPEN_SOURCE 500
59 * Now for some includes..
61 #include "rrd.h" /* {{{ */
62 #include "rrd_client.h"
72 #include <sys/types.h>
76 #include <sys/socket.h>
87 #include <glib-2.0/glib.h>
90 #define RRDD_LOG(severity, ...) syslog ((severity), __VA_ARGS__)
93 # define __attribute__(x) /**/
99 struct listen_socket_s
102 char path[PATH_MAX + 1];
104 typedef struct listen_socket_s listen_socket_t;
107 typedef struct cache_item_s cache_item_t;
113 time_t last_flush_time;
114 #define CI_FLAGS_IN_TREE 0x01
115 #define CI_FLAGS_IN_QUEUE 0x02
121 struct callback_flush_data_s
127 typedef struct callback_flush_data_s callback_flush_data_t;
134 typedef enum queue_side_e queue_side_t;
139 static listen_socket_t *listen_fds = NULL;
140 static size_t listen_fds_num = 0;
142 static int do_shutdown = 0;
144 static pthread_t queue_thread;
146 static pthread_t *connetion_threads = NULL;
147 static pthread_mutex_t connetion_threads_lock = PTHREAD_MUTEX_INITIALIZER;
148 static int connetion_threads_num = 0;
151 static GTree *cache_tree = NULL;
152 static cache_item_t *cache_queue_head = NULL;
153 static cache_item_t *cache_queue_tail = NULL;
154 static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER;
155 static pthread_cond_t cache_cond = PTHREAD_COND_INITIALIZER;
157 static pthread_cond_t flush_cond = PTHREAD_COND_INITIALIZER;
159 static int config_write_interval = 300;
160 static int config_flush_interval = 3600;
161 static char *config_pid_file = NULL;
162 static char *config_base_dir = NULL;
164 static char **config_listen_address_list = NULL;
165 static int config_listen_address_list_len = 0;
167 static uint64_t stats_queue_length = 0;
168 static uint64_t stats_updates_total = 0;
169 static uint64_t stats_values_total = 0;
170 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
175 static void sig_int_handler (int s __attribute__((unused))) /* {{{ */
178 } /* }}} void sig_int_handler */
180 static void sig_term_handler (int s __attribute__((unused))) /* {{{ */
183 } /* }}} void sig_term_handler */
185 static int write_pidfile (void) /* {{{ */
193 file = (config_pid_file != NULL)
195 : LOCALSTATEDIR "/run/rrdcached.pid";
197 fh = fopen (file, "w");
200 RRDD_LOG (LOG_ERR, "write_pidfile: Opening `%s' failed.", file);
204 fprintf (fh, "%i\n", (int) pid);
208 } /* }}} int write_pidfile */
210 static int remove_pidfile (void) /* {{{ */
215 file = (config_pid_file != NULL)
217 : LOCALSTATEDIR "/run/rrdcached.pid";
219 status = unlink (file);
223 } /* }}} int remove_pidfile */
226 * enqueue_cache_item:
227 * `cache_lock' must be acquired before calling this function!
229 static int enqueue_cache_item (cache_item_t *ci, /* {{{ */
234 RRDD_LOG (LOG_DEBUG, "enqueue_cache_item: Adding %s to the update queue.",
240 if (ci->values_num == 0)
245 if ((ci->flags & CI_FLAGS_IN_QUEUE) == 0)
247 assert (ci->next == NULL);
248 ci->next = cache_queue_head;
249 cache_queue_head = ci;
251 if (cache_queue_tail == NULL)
252 cache_queue_tail = cache_queue_head;
256 else if (cache_queue_head == ci)
260 else /* enqueued, but not first entry */
264 /* find previous entry */
265 for (prev = cache_queue_head; prev != NULL; prev = prev->next)
266 if (prev->next == ci)
268 assert (prev != NULL);
270 /* move to the front */
271 prev->next = ci->next;
272 ci->next = cache_queue_head;
273 cache_queue_head = ci;
275 /* check if we need to adapt the tail */
276 if (cache_queue_tail == ci)
277 cache_queue_tail = prev;
280 else /* (side == TAIL) */
282 /* We don't move values back in the list.. */
283 if ((ci->flags & CI_FLAGS_IN_QUEUE) != 0)
286 assert (ci->next == NULL);
288 if (cache_queue_tail == NULL)
289 cache_queue_head = ci;
291 cache_queue_tail->next = ci;
292 cache_queue_tail = ci;
297 ci->flags |= CI_FLAGS_IN_QUEUE;
301 pthread_mutex_lock (&stats_lock);
302 stats_queue_length++;
303 pthread_mutex_unlock (&stats_lock);
307 } /* }}} int enqueue_cache_item */
310 * tree_callback_flush:
311 * Called via `g_tree_foreach' in `queue_thread_main'. `cache_lock' is held
312 * while this is in progress.
314 static gboolean tree_callback_flush (gpointer key, gpointer value, /* {{{ */
318 callback_flush_data_t *cfd;
320 ci = (cache_item_t *) value;
321 cfd = (callback_flush_data_t *) data;
323 if (((cfd->now - ci->last_flush_time) >= config_write_interval)
324 && ((ci->flags & CI_FLAGS_IN_QUEUE) == 0)
325 && (ci->values_num > 0))
327 enqueue_cache_item (ci, TAIL);
329 else if (((cfd->now - ci->last_flush_time) >= config_flush_interval)
330 && ((ci->flags & CI_FLAGS_IN_QUEUE) == 0)
331 && (ci->values_num <= 0))
335 temp = (char **) realloc (cfd->keys,
336 sizeof (char *) * (cfd->keys_num + 1));
339 RRDD_LOG (LOG_ERR, "tree_callback_flush: realloc failed.");
343 /* Make really sure this points to the _same_ place */
344 assert ((char *) key == ci->file);
345 cfd->keys[cfd->keys_num] = (char *) key;
350 } /* }}} gboolean tree_callback_flush */
352 static void *queue_thread_main (void *args __attribute__((unused))) /* {{{ */
355 struct timespec next_flush;
357 gettimeofday (&now, NULL);
358 next_flush.tv_sec = now.tv_sec + config_flush_interval;
359 next_flush.tv_nsec = 1000 * now.tv_usec;
361 pthread_mutex_lock (&cache_lock);
362 while ((do_shutdown == 0) || (cache_queue_head != NULL))
371 /* First, check if it's time to do the cache flush. */
372 gettimeofday (&now, NULL);
373 if ((now.tv_sec > next_flush.tv_sec)
374 || ((now.tv_sec == next_flush.tv_sec)
375 && ((1000 * now.tv_usec) > next_flush.tv_nsec)))
377 callback_flush_data_t cfd;
380 memset (&cfd, 0, sizeof (cfd));
381 /* Pass the current time as user data so that we don't need to call
382 * `time' for each node. */
383 cfd.now = time (NULL);
387 /* `tree_callback_flush' will return the keys of all values that haven't
388 * been touched in the last `config_flush_interval' seconds in `cfd'.
389 * The char*'s in this array point to the same memory as ci->file, so we
390 * don't need to free them separately. */
391 g_tree_foreach (cache_tree, tree_callback_flush, (gpointer) &cfd);
393 for (k = 0; k < cfd.keys_num; k++)
395 /* This must not fail. */
396 ci = (cache_item_t *) g_tree_lookup (cache_tree, cfd.keys[k]);
399 /* If we end up here with values available, something's seriously
401 assert (ci->values_num == 0);
403 /* Remove the node from the tree */
404 g_tree_remove (cache_tree, cfd.keys[k]);
407 /* Now free and clean up `ci'. */
412 } /* for (k = 0; k < cfd.keys_num; k++) */
414 if (cfd.keys != NULL)
420 /* Determine the time of the next cache flush. */
421 while (next_flush.tv_sec < now.tv_sec)
422 next_flush.tv_sec += config_flush_interval;
425 /* Now, check if there's something to store away. If not, wait until
426 * something comes in or it's time to do the cache flush. */
427 if (cache_queue_head == NULL)
429 status = pthread_cond_timedwait (&cache_cond, &cache_lock, &next_flush);
430 if ((status != 0) && (status != ETIMEDOUT))
432 RRDD_LOG (LOG_ERR, "queue_thread_main: "
433 "pthread_cond_timedwait returned %i.", status);
437 /* Check if a value has arrived. This may be NULL if we timed out or there
438 * was an interrupt such as a signal. */
439 if (cache_queue_head == NULL)
442 ci = cache_queue_head;
444 /* copy the relevant parts */
445 file = strdup (ci->file);
448 RRDD_LOG (LOG_ERR, "queue_thread_main: strdup failed.");
453 values_num = ci->values_num;
458 ci->last_flush_time = time (NULL);
459 ci->flags &= ~(CI_FLAGS_IN_QUEUE);
461 cache_queue_head = ci->next;
462 if (cache_queue_head == NULL)
463 cache_queue_tail = NULL;
466 pthread_mutex_lock (&stats_lock);
467 assert (stats_queue_length > 0);
468 stats_queue_length--;
469 pthread_mutex_unlock (&stats_lock);
471 pthread_mutex_unlock (&cache_lock);
473 RRDD_LOG (LOG_DEBUG, "queue_thread_main: rrd_update (%s, %i, %p)",
474 file, values_num, (void *) values);
476 status = rrd_update_r (file, NULL, values_num, (void *) values);
479 RRDD_LOG (LOG_ERR, "queue_thread_main: "
480 "rrd_update_r failed with status %i.",
485 for (i = 0; i < values_num; i++)
488 pthread_mutex_lock (&stats_lock);
489 stats_updates_total++;
490 stats_values_total += values_num;
491 pthread_mutex_unlock (&stats_lock);
493 pthread_mutex_lock (&cache_lock);
494 pthread_cond_broadcast (&flush_cond);
495 } /* while (do_shutdown == 0) */
496 pthread_mutex_unlock (&cache_lock);
498 RRDD_LOG (LOG_DEBUG, "queue_thread_main: Exiting.");
501 } /* }}} void *queue_thread_main */
503 static int buffer_get_field (char **buffer_ret, /* {{{ */
504 size_t *buffer_size_ret, char **field_ret)
513 buffer = *buffer_ret;
515 buffer_size = *buffer_size_ret;
519 /* This is ensured by `handle_request'. */
520 assert (buffer[buffer_size - 1] == ' ');
523 while (buffer_pos < buffer_size)
525 /* Check for end-of-field or end-of-buffer */
526 if (buffer[buffer_pos] == ' ')
528 field[field_size] = 0;
534 /* Handle escaped characters. */
535 else if (buffer[buffer_pos] == '\\')
537 if (buffer_pos >= (buffer_size - 1))
540 field[field_size] = buffer[buffer_pos];
544 /* Normal operation */
547 field[field_size] = buffer[buffer_pos];
551 } /* while (buffer_pos < buffer_size) */
556 *buffer_ret = buffer + buffer_pos;
557 *buffer_size_ret = buffer_size - buffer_pos;
561 } /* }}} int buffer_get_field */
563 static int flush_file (const char *filename) /* {{{ */
567 pthread_mutex_lock (&cache_lock);
569 ci = (cache_item_t *) g_tree_lookup (cache_tree, filename);
572 pthread_mutex_unlock (&cache_lock);
576 /* Enqueue at head */
577 enqueue_cache_item (ci, HEAD);
578 pthread_cond_signal (&cache_cond);
580 while ((ci->flags & CI_FLAGS_IN_QUEUE) != 0)
584 pthread_cond_wait (&flush_cond, &cache_lock);
586 ci = g_tree_lookup (cache_tree, filename);
589 RRDD_LOG (LOG_ERR, "flush_file: Tree node went away "
590 "while waiting for flush.");
591 pthread_mutex_unlock (&cache_lock);
596 pthread_mutex_unlock (&cache_lock);
598 } /* }}} int flush_file */
600 static int handle_request_stats (int fd, /* {{{ */
601 char *buffer __attribute__((unused)),
602 size_t buffer_size __attribute__((unused)))
607 uint64_t copy_queue_length;
608 uint64_t copy_updates_total;
609 uint64_t copy_values_total;
614 pthread_mutex_lock (&stats_lock);
615 copy_queue_length = stats_queue_length;
616 copy_updates_total = stats_updates_total;
617 copy_values_total = stats_values_total;
618 pthread_mutex_unlock (&stats_lock);
620 pthread_mutex_lock (&cache_lock);
621 tree_nodes = (uint64_t) g_tree_nnodes (cache_tree);
622 tree_depth = (uint64_t) g_tree_height (cache_tree);
623 pthread_mutex_unlock (&cache_lock);
625 #define RRDD_STATS_SEND \
626 outbuf[sizeof (outbuf) - 1] = 0; \
627 status = write (fd, outbuf, strlen (outbuf)); \
631 RRDD_LOG (LOG_INFO, "handle_request_stats: write(2) returned an error."); \
635 strncpy (outbuf, "5 Statistics follow\n", sizeof (outbuf));
638 snprintf (outbuf, sizeof (outbuf),
639 "QueueLength: %"PRIu64"\n", copy_queue_length);
642 snprintf (outbuf, sizeof (outbuf),
643 "UpdatesWritten: %"PRIu64"\n", copy_updates_total);
646 snprintf (outbuf, sizeof (outbuf),
647 "ValuesWritten: %"PRIu64"\n", copy_values_total);
650 snprintf (outbuf, sizeof (outbuf),
651 "TreeNodesNumber: %"PRIu64"\n", tree_nodes);
654 snprintf (outbuf, sizeof (outbuf),
655 "TreeDepth: %"PRIu64"\n", tree_depth);
659 } /* }}} int handle_request_stats */
661 static int handle_request_flush (int fd, /* {{{ */
662 char *buffer, size_t buffer_size)
668 status = buffer_get_field (&buffer, &buffer_size, &file);
671 RRDD_LOG (LOG_INFO, "handle_request_flush: Cannot get file name.");
675 status = flush_file (file);
677 snprintf (result, sizeof (result), "0 Successfully flushed %s.\n", file);
678 else if (status == ENOENT)
679 snprintf (result, sizeof (result), "-1 No such file: %s.\n", file);
681 strncpy (result, "-1 Internal error.\n", sizeof (result));
683 snprintf (result, sizeof (result), "-1 Failed with status %i.\n", status);
684 result[sizeof (result) - 1] = 0;
686 status = write (fd, result, strlen (result));
690 RRDD_LOG (LOG_INFO, "handle_request_flush: write(2) returned an error.");
695 } /* }}} int handle_request_flush */
697 static int handle_request_update (int fd, /* {{{ */
698 char *buffer, size_t buffer_size)
711 status = buffer_get_field (&buffer, &buffer_size, &file);
714 RRDD_LOG (LOG_INFO, "handle_request_update: Cannot get file name.");
718 pthread_mutex_lock (&cache_lock);
720 ci = g_tree_lookup (cache_tree, file);
721 if (ci == NULL) /* {{{ */
723 ci = (cache_item_t *) malloc (sizeof (cache_item_t));
726 pthread_mutex_unlock (&cache_lock);
727 RRDD_LOG (LOG_ERR, "handle_request_update: malloc failed.");
730 memset (ci, 0, sizeof (cache_item_t));
732 ci->file = strdup (file);
733 if (ci->file == NULL)
735 pthread_mutex_unlock (&cache_lock);
736 RRDD_LOG (LOG_ERR, "handle_request_update: malloc failed.");
743 ci->last_flush_time = now;
744 ci->flags = CI_FLAGS_IN_TREE;
746 g_tree_insert (cache_tree, (void *) ci->file, (void *) ci);
748 RRDD_LOG (LOG_DEBUG, "handle_request_update: Created new tree node %s.",
753 while (buffer_size > 0)
758 status = buffer_get_field (&buffer, &buffer_size, &value);
761 RRDD_LOG (LOG_INFO, "handle_request_update: Error reading field.");
765 temp = (char **) realloc (ci->values,
766 sizeof (char *) * (ci->values_num + 1));
769 RRDD_LOG (LOG_ERR, "handle_request_update: realloc failed.");
774 ci->values[ci->values_num] = strdup (value);
775 if (ci->values[ci->values_num] == NULL)
777 RRDD_LOG (LOG_ERR, "handle_request_update: strdup failed.");
785 if (((now - ci->last_flush_time) >= config_write_interval)
786 && ((ci->flags & CI_FLAGS_IN_QUEUE) == 0)
787 && (ci->values_num > 0))
789 enqueue_cache_item (ci, TAIL);
790 pthread_cond_signal (&cache_cond);
793 pthread_mutex_unlock (&cache_lock);
795 snprintf (answer, sizeof (answer), "0 Enqueued %i value(s)\n", values_num);
796 answer[sizeof (answer) - 1] = 0;
798 status = write (fd, answer, strlen (answer));
802 RRDD_LOG (LOG_INFO, "handle_request_update: write(2) returned an error.");
807 } /* }}} int handle_request_update */
809 static int handle_request (int fd) /* {{{ */
817 status = read (fd, buffer, sizeof (buffer));
824 RRDD_LOG (LOG_ERR, "handle_request: read(2) failed.");
827 buffer_size = status;
828 assert (((size_t) buffer_size) <= sizeof (buffer));
830 if (buffer[buffer_size - 1] != '\n')
832 RRDD_LOG (LOG_INFO, "handle_request: malformed request.");
836 /* Accept Windows style line endings, too */
837 if ((buffer_size > 2) && (buffer[buffer_size - 2] == '\r'))
840 buffer[buffer_size - 1] = '\n';
843 /* Place the normal field separator at the end to simplify
844 * `buffer_get_field's work. */
845 buffer[buffer_size - 1] = ' ';
849 status = buffer_get_field (&buffer_ptr, &buffer_size, &command);
852 RRDD_LOG (LOG_INFO, "handle_request: Unable parse command.");
856 if (strcmp (command, "update") == 0)
858 return (handle_request_update (fd, buffer_ptr, buffer_size));
860 else if (strcmp (command, "flush") == 0)
862 return (handle_request_flush (fd, buffer_ptr, buffer_size));
864 else if (strcmp (command, "stats") == 0)
866 return (handle_request_stats (fd, buffer_ptr, buffer_size));
870 RRDD_LOG (LOG_INFO, "handle_request: unknown command: %s.", buffer);
873 } /* }}} int handle_request */
875 static void *connection_thread_main (void *args /* {{{ */
876 __attribute__((unused)))
882 fd = *((int *) args);
884 pthread_mutex_lock (&connetion_threads_lock);
888 temp = (pthread_t *) realloc (connetion_threads,
889 sizeof (pthread_t) * (connetion_threads_num + 1));
892 RRDD_LOG (LOG_ERR, "connection_thread_main: realloc failed.");
896 connetion_threads = temp;
897 connetion_threads[connetion_threads_num] = pthread_self ();
898 connetion_threads_num++;
901 pthread_mutex_unlock (&connetion_threads_lock);
903 while (do_shutdown == 0)
905 struct pollfd pollfd;
909 pollfd.events = POLLIN | POLLPRI;
912 status = poll (&pollfd, 1, /* timeout = */ 500);
913 if (status == 0) /* timeout */
915 else if (status < 0) /* error */
920 RRDD_LOG (LOG_ERR, "connection_thread_main: poll(2) failed.");
924 if ((pollfd.revents & POLLHUP) != 0) /* normal shutdown */
929 else if ((pollfd.revents & (POLLIN | POLLPRI)) == 0)
931 RRDD_LOG (LOG_WARNING, "connection_thread_main: "
932 "poll(2) returned something unexpected: %#04hx",
938 status = handle_request (fd);
946 self = pthread_self ();
947 /* Remove this thread from the connection threads list */
948 pthread_mutex_lock (&connetion_threads_lock);
949 /* Find out own index in the array */
950 for (i = 0; i < connetion_threads_num; i++)
951 if (pthread_equal (connetion_threads[i], self) != 0)
953 assert (i < connetion_threads_num);
955 /* Move the trailing threads forward. */
956 if (i < (connetion_threads_num - 1))
958 memmove (connetion_threads + i,
959 connetion_threads + i + 1,
960 sizeof (pthread_t) * (connetion_threads_num - i - 1));
963 connetion_threads_num--;
964 pthread_mutex_unlock (&connetion_threads_lock);
968 } /* }}} void *connection_thread_main */
970 static int open_listen_socket_unix (const char *path) /* {{{ */
973 struct sockaddr_un sa;
974 listen_socket_t *temp;
977 temp = (listen_socket_t *) realloc (listen_fds,
978 sizeof (listen_fds[0]) * (listen_fds_num + 1));
981 RRDD_LOG (LOG_ERR, "open_listen_socket_unix: realloc failed.");
985 memset (listen_fds + listen_fds_num, 0, sizeof (listen_fds[0]));
987 fd = socket (PF_UNIX, SOCK_STREAM, /* protocol = */ 0);
990 RRDD_LOG (LOG_ERR, "open_listen_socket_unix: socket(2) failed.");
994 memset (&sa, 0, sizeof (sa));
995 sa.sun_family = AF_UNIX;
996 strncpy (sa.sun_path, path, sizeof (sa.sun_path) - 1);
998 status = bind (fd, (struct sockaddr *) &sa, sizeof (sa));
1001 RRDD_LOG (LOG_ERR, "open_listen_socket_unix: bind(2) failed.");
1007 status = listen (fd, /* backlog = */ 10);
1010 RRDD_LOG (LOG_ERR, "open_listen_socket_unix: listen(2) failed.");
1016 listen_fds[listen_fds_num].fd = fd;
1017 snprintf (listen_fds[listen_fds_num].path,
1018 sizeof (listen_fds[listen_fds_num].path) - 1,
1023 } /* }}} int open_listen_socket_unix */
1025 static int open_listen_socket (const char *addr) /* {{{ */
1027 struct addrinfo ai_hints;
1028 struct addrinfo *ai_res;
1029 struct addrinfo *ai_ptr;
1032 assert (addr != NULL);
1034 if (strncmp ("unix:", addr, strlen ("unix:")) == 0)
1035 return (open_listen_socket_unix (addr + strlen ("unix:")));
1036 else if (addr[0] == '/')
1037 return (open_listen_socket_unix (addr));
1039 memset (&ai_hints, 0, sizeof (ai_hints));
1040 ai_hints.ai_flags = 0;
1041 #ifdef AI_ADDRCONFIG
1042 ai_hints.ai_flags |= AI_ADDRCONFIG;
1044 ai_hints.ai_family = AF_UNSPEC;
1045 ai_hints.ai_socktype = SOCK_STREAM;
1048 status = getaddrinfo (addr, RRDCACHED_DEFAULT_PORT, &ai_hints, &ai_res);
1051 RRDD_LOG (LOG_ERR, "open_listen_socket: getaddrinfo(%s) failed: "
1052 "%s", addr, gai_strerror (status));
1056 for (ai_ptr = ai_res; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1059 listen_socket_t *temp;
1061 temp = (listen_socket_t *) realloc (listen_fds,
1062 sizeof (listen_fds[0]) * (listen_fds_num + 1));
1065 RRDD_LOG (LOG_ERR, "open_listen_socket: realloc failed.");
1069 memset (listen_fds + listen_fds_num, 0, sizeof (listen_fds[0]));
1071 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
1074 RRDD_LOG (LOG_ERR, "open_listen_socket: socket(2) failed.");
1078 status = bind (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
1081 RRDD_LOG (LOG_ERR, "open_listen_socket: bind(2) failed.");
1086 status = listen (fd, /* backlog = */ 10);
1089 RRDD_LOG (LOG_ERR, "open_listen_socket: listen(2) failed.");
1094 listen_fds[listen_fds_num].fd = fd;
1095 strncpy (listen_fds[listen_fds_num].path, addr,
1096 sizeof (listen_fds[listen_fds_num].path) - 1);
1098 } /* for (ai_ptr) */
1101 } /* }}} int open_listen_socket */
1103 static int close_listen_sockets (void) /* {{{ */
1107 for (i = 0; i < listen_fds_num; i++)
1109 close (listen_fds[i].fd);
1110 if (strncmp ("unix:", listen_fds[i].path, strlen ("unix:")) == 0)
1111 unlink (listen_fds[i].path + strlen ("unix:"));
1119 } /* }}} int close_listen_sockets */
1121 static void *listen_thread_main (void *args __attribute__((unused))) /* {{{ */
1123 struct pollfd *pollfds;
1128 for (i = 0; i < config_listen_address_list_len; i++)
1130 RRDD_LOG (LOG_DEBUG, "listen_thread_main: config_listen_address_list[%i] "
1131 "= %s", i, config_listen_address_list[i]);
1132 open_listen_socket (config_listen_address_list[i]);
1135 if (config_listen_address_list_len < 1)
1136 open_listen_socket (RRDCACHED_DEFAULT_ADDRESS);
1138 if (listen_fds_num < 1)
1140 RRDD_LOG (LOG_ERR, "listen_thread_main: No listen sockets "
1141 "could be opened. Sorry.");
1145 pollfds_num = listen_fds_num;
1146 pollfds = (struct pollfd *) malloc (sizeof (*pollfds) * pollfds_num);
1147 if (pollfds == NULL)
1149 RRDD_LOG (LOG_ERR, "listen_thread_main: malloc failed.");
1152 memset (pollfds, 0, sizeof (*pollfds) * pollfds_num);
1154 while (do_shutdown == 0)
1156 assert (pollfds_num == ((int) listen_fds_num));
1157 for (i = 0; i < pollfds_num; i++)
1159 pollfds[i].fd = listen_fds[i].fd;
1160 pollfds[i].events = POLLIN | POLLPRI;
1161 pollfds[i].revents = 0;
1164 status = poll (pollfds, pollfds_num, /* timeout = */ -1);
1168 if (status != EINTR)
1170 RRDD_LOG (LOG_ERR, "listen_thread_main: poll(2) failed.");
1175 for (i = 0; i < pollfds_num; i++)
1178 struct sockaddr_storage client_sa;
1179 socklen_t client_sa_size;
1182 if (pollfds[i].revents == 0)
1185 if ((pollfds[i].revents & (POLLIN | POLLPRI)) == 0)
1187 RRDD_LOG (LOG_ERR, "listen_thread_main: "
1188 "poll(2) returned something unexpected for listen FD #%i.",
1193 client_sd = (int *) malloc (sizeof (int));
1194 if (client_sd == NULL)
1196 RRDD_LOG (LOG_ERR, "listen_thread_main: malloc failed.");
1200 client_sa_size = sizeof (client_sa);
1201 *client_sd = accept (pollfds[i].fd,
1202 (struct sockaddr *) &client_sa, &client_sa_size);
1205 RRDD_LOG (LOG_ERR, "listen_thread_main: accept(2) failed.");
1209 status = pthread_create (&tid, /* attr = */ NULL, connection_thread_main,
1210 /* args = */ (void *) client_sd);
1213 RRDD_LOG (LOG_ERR, "listen_thread_main: pthread_create failed.");
1218 } /* for (pollfds_num) */
1219 } /* while (do_shutdown == 0) */
1221 close_listen_sockets ();
1223 pthread_mutex_lock (&connetion_threads_lock);
1224 while (connetion_threads_num > 0)
1228 wait_for = connetion_threads[0];
1230 pthread_mutex_unlock (&connetion_threads_lock);
1231 pthread_join (wait_for, /* retval = */ NULL);
1232 pthread_mutex_lock (&connetion_threads_lock);
1234 pthread_mutex_unlock (&connetion_threads_lock);
1236 RRDD_LOG (LOG_DEBUG, "listen_thread_main: Exiting.");
1239 } /* }}} void *listen_thread_main */
1241 static int daemonize (void) /* {{{ */
1247 /* These structures are static, because `sigaction' behaves weird if the are
1249 static struct sigaction sa_int;
1250 static struct sigaction sa_term;
1251 static struct sigaction sa_pipe;
1256 fprintf (stderr, "daemonize: fork(2) failed.\n");
1264 /* Change into the /tmp directory. */
1265 base_dir = (config_base_dir != NULL)
1268 status = chdir (base_dir);
1271 fprintf (stderr, "daemonize: chdir (%s) failed.\n", base_dir);
1275 /* Become session leader */
1278 /* Open the first three file descriptors to /dev/null */
1283 open ("/dev/null", O_RDWR);
1287 /* Install signal handlers */
1288 memset (&sa_int, 0, sizeof (sa_int));
1289 sa_int.sa_handler = sig_int_handler;
1290 sigaction (SIGINT, &sa_int, NULL);
1292 memset (&sa_term, 0, sizeof (sa_term));
1293 sa_term.sa_handler = sig_term_handler;
1294 sigaction (SIGINT, &sa_term, NULL);
1296 memset (&sa_pipe, 0, sizeof (sa_pipe));
1297 sa_pipe.sa_handler = SIG_IGN;
1298 sigaction (SIGPIPE, &sa_pipe, NULL);
1300 openlog ("rrdcached", LOG_PID, LOG_DAEMON);
1302 cache_tree = g_tree_new ((GCompareFunc) strcmp);
1303 if (cache_tree == NULL)
1305 RRDD_LOG (LOG_ERR, "daemonize: g_tree_new failed.");
1309 memset (&queue_thread, 0, sizeof (queue_thread));
1310 status = pthread_create (&queue_thread, /* attr = */ NULL,
1311 queue_thread_main, /* args = */ NULL);
1314 RRDD_LOG (LOG_ERR, "daemonize: pthread_create failed.");
1321 } /* }}} int daemonize */
1323 static int cleanup (void) /* {{{ */
1325 RRDD_LOG (LOG_DEBUG, "cleanup ()");
1329 RRDD_LOG (LOG_DEBUG, "cleanup: Joining queue_thread..");
1330 pthread_cond_signal (&cache_cond);
1331 pthread_join (queue_thread, /* return = */ NULL);
1332 RRDD_LOG (LOG_DEBUG, "cleanup: done");
1339 } /* }}} int cleanup */
1341 static int read_options (int argc, char **argv) /* {{{ */
1346 while ((option = getopt(argc, argv, "l:f:w:b:p:h?")) != -1)
1354 temp = (char **) realloc (config_listen_address_list,
1355 sizeof (char *) * (config_listen_address_list_len + 1));
1358 fprintf (stderr, "read_options: realloc failed.\n");
1361 config_listen_address_list = temp;
1363 temp[config_listen_address_list_len] = strdup (optarg);
1364 if (temp[config_listen_address_list_len] == NULL)
1366 fprintf (stderr, "read_options: strdup failed.\n");
1369 config_listen_address_list_len++;
1377 temp = atoi (optarg);
1379 config_flush_interval = temp;
1382 fprintf (stderr, "Invalid flush interval: %s\n", optarg);
1392 temp = atoi (optarg);
1394 config_write_interval = temp;
1397 fprintf (stderr, "Invalid write interval: %s\n", optarg);
1407 if (config_base_dir != NULL)
1408 free (config_base_dir);
1409 config_base_dir = strdup (optarg);
1410 if (config_base_dir == NULL)
1412 fprintf (stderr, "read_options: strdup failed.\n");
1416 len = strlen (config_base_dir);
1417 while ((len > 0) && (config_base_dir[len - 1] == '/'))
1419 config_base_dir[len - 1] = 0;
1425 fprintf (stderr, "Invalid base directory: %s\n", optarg);
1433 if (config_pid_file != NULL)
1434 free (config_pid_file);
1435 config_pid_file = strdup (optarg);
1436 if (config_pid_file == NULL)
1438 fprintf (stderr, "read_options: strdup failed.\n");
1446 printf ("RRDd %s Copyright (C) 2008 Florian octo Forster\n"
1448 "Usage: rrdcached [options]\n"
1450 "Valid options are:\n"
1451 " -l <address> Socket address to listen to.\n"
1452 " -w <seconds> Interval in which to write data.\n"
1453 " -f <seconds> Interval in which to flush dead data.\n"
1454 " -p <file> Location of the PID-file.\n"
1455 " -b <dir> Base directory to change to.\n"
1457 "For more information and a detailed description of all options "
1459 "to the rrdcached(1) manual page.\n",
1463 } /* switch (option) */
1464 } /* while (getopt) */
1467 } /* }}} int read_options */
1469 int main (int argc, char **argv)
1473 status = read_options (argc, argv);
1481 status = daemonize ();
1484 struct sigaction sigchld;
1486 memset (&sigchld, 0, sizeof (sigchld));
1487 sigchld.sa_handler = SIG_IGN;
1488 sigaction (SIGCHLD, &sigchld, NULL);
1492 else if (status != 0)
1494 fprintf (stderr, "daemonize failed, exiting.\n");
1498 listen_thread_main (NULL);
1506 * vim: set sw=2 sts=2 ts=8 et fdm=marker :