2 * RRDTool - src/rrd_daemon.c
3 * Copyright (C) 2008,2009 Florian octo Forster
4 * Copyright (C) 2008,2009 Kevin Brintnall
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; only version 2 of the License is applicable.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * Florian octo Forster <octo at verplant.org>
21 * kevin brintnall <kbrint@rufus.net>
26 * First tell the compiler to stick to the C99 and POSIX standards as close as
29 #ifndef __STRICT_ANSI__ /* {{{ */
30 # define __STRICT_ANSI__
33 #ifndef _ISOC99_SOURCE
34 # define _ISOC99_SOURCE
37 #ifdef _POSIX_C_SOURCE
38 # undef _POSIX_C_SOURCE
40 #define _POSIX_C_SOURCE 200112L
42 /* Single UNIX needed for strdup. */
46 #define _XOPEN_SOURCE 500
63 * Now for some includes..
66 #if defined(_WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__) && !defined(HAVE_CONFIG_H)
67 #include "../win32/config.h"
70 #include "../rrd_config.h"
75 #include "rrd_client.h"
86 #include <sys/socket.h>
94 #include <sys/types.h>
106 #include <sys/time.h>
111 #include <glib-2.0/glib.h>
114 #define RRDD_LOG(severity, ...) syslog ((severity), __VA_ARGS__)
117 # define __attribute__(x) /**/
123 typedef enum { RESP_ERR = -1, RESP_OK = 0 } response_code;
125 struct listen_socket_s
128 char addr[PATH_MAX + 1];
131 /* state for BATCH processing */
143 uint32_t permissions;
145 typedef struct listen_socket_s listen_socket_t;
148 typedef struct command_s command_t;
149 /* note: guard against "unused" warnings in the handlers */
150 #define DISPATCH_PROTO listen_socket_t *sock __attribute__((unused)),\
151 time_t now __attribute__((unused)),\
152 char *buffer __attribute__((unused)),\
153 size_t buffer_size __attribute__((unused))
155 #define HANDLER_PROTO command_t *cmd __attribute__((unused)),\
160 int (*handler)(HANDLER_PROTO);
162 char context; /* where we expect to see it */
163 #define CMD_CONTEXT_CLIENT (1<<0)
164 #define CMD_CONTEXT_BATCH (1<<1)
165 #define CMD_CONTEXT_JOURNAL (1<<2)
166 #define CMD_CONTEXT_ANY (0x7f)
173 typedef struct cache_item_s cache_item_t;
179 time_t last_flush_time;
180 time_t last_update_stamp;
181 #define CI_FLAGS_IN_TREE (1<<0)
182 #define CI_FLAGS_IN_QUEUE (1<<1)
184 pthread_cond_t flushed;
189 struct callback_flush_data_s
196 typedef struct callback_flush_data_s callback_flush_data_t;
203 typedef enum queue_side_e queue_side_t;
205 /* describe a set of journal files */
211 /* max length of socket command or response */
213 #define RBUF_SIZE (CMD_MAX*2)
218 static int stay_foreground = 0;
219 static uid_t daemon_uid;
221 static listen_socket_t *listen_fds = NULL;
222 static size_t listen_fds_num = 0;
224 static gboolean set_socket_group = FALSE;
225 static gid_t socket_group;
228 RUNNING, /* normal operation */
229 FLUSHING, /* flushing remaining values */
230 SHUTDOWN /* shutting down */
233 static pthread_t *queue_threads;
234 static pthread_cond_t queue_cond = PTHREAD_COND_INITIALIZER;
235 static int config_queue_threads = 4;
237 static pthread_t flush_thread;
238 static pthread_cond_t flush_cond = PTHREAD_COND_INITIALIZER;
240 static pthread_mutex_t connection_threads_lock = PTHREAD_MUTEX_INITIALIZER;
241 static pthread_cond_t connection_threads_done = PTHREAD_COND_INITIALIZER;
242 static int connection_threads_num = 0;
245 static GTree *cache_tree = NULL;
246 static cache_item_t *cache_queue_head = NULL;
247 static cache_item_t *cache_queue_tail = NULL;
248 static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER;
250 static int config_write_interval = 300;
251 static int config_write_jitter = 0;
252 static int config_flush_interval = 3600;
253 static int config_flush_at_shutdown = 0;
254 static char *config_pid_file = NULL;
255 static char *config_base_dir = NULL;
256 static size_t _config_base_dir_len = 0;
257 static int config_write_base_only = 0;
259 static listen_socket_t **config_listen_address_list = NULL;
260 static size_t config_listen_address_list_len = 0;
262 static uint64_t stats_queue_length = 0;
263 static uint64_t stats_updates_received = 0;
264 static uint64_t stats_flush_received = 0;
265 static uint64_t stats_updates_written = 0;
266 static uint64_t stats_data_sets_written = 0;
267 static uint64_t stats_journal_bytes = 0;
268 static uint64_t stats_journal_rotate = 0;
269 static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
271 /* Journaled updates */
272 #define JOURNAL_REPLAY(s) ((s) == NULL)
273 #define JOURNAL_BASE "rrd.journal"
274 static journal_set *journal_cur = NULL;
275 static journal_set *journal_old = NULL;
276 static char *journal_dir = NULL;
277 static FILE *journal_fh = NULL; /* current journal file handle */
278 static long journal_size = 0; /* current journal size */
279 #define JOURNAL_MAX (1 * 1024 * 1024 * 1024)
280 static pthread_mutex_t journal_lock = PTHREAD_MUTEX_INITIALIZER;
281 static int journal_write(char *cmd, char *args);
282 static void journal_done(void);
283 static void journal_rotate(void);
285 /* prototypes for forward refernces */
286 static int handle_request_help (HANDLER_PROTO);
291 static void sig_common (const char *sig) /* {{{ */
293 RRDD_LOG(LOG_NOTICE, "caught SIG%s", sig);
295 pthread_cond_broadcast(&flush_cond);
296 pthread_cond_broadcast(&queue_cond);
297 } /* }}} void sig_common */
299 static void sig_int_handler (int s __attribute__((unused))) /* {{{ */
302 } /* }}} void sig_int_handler */
304 static void sig_term_handler (int s __attribute__((unused))) /* {{{ */
307 } /* }}} void sig_term_handler */
309 static void sig_usr1_handler (int s __attribute__((unused))) /* {{{ */
311 config_flush_at_shutdown = 1;
313 } /* }}} void sig_usr1_handler */
315 static void sig_usr2_handler (int s __attribute__((unused))) /* {{{ */
317 config_flush_at_shutdown = 0;
319 } /* }}} void sig_usr2_handler */
321 static void install_signal_handlers(void) /* {{{ */
323 /* These structures are static, because `sigaction' behaves weird if the are
325 static struct sigaction sa_int;
326 static struct sigaction sa_term;
327 static struct sigaction sa_pipe;
328 static struct sigaction sa_usr1;
329 static struct sigaction sa_usr2;
331 /* Install signal handlers */
332 memset (&sa_int, 0, sizeof (sa_int));
333 sa_int.sa_handler = sig_int_handler;
334 sigaction (SIGINT, &sa_int, NULL);
336 memset (&sa_term, 0, sizeof (sa_term));
337 sa_term.sa_handler = sig_term_handler;
338 sigaction (SIGTERM, &sa_term, NULL);
340 memset (&sa_pipe, 0, sizeof (sa_pipe));
341 sa_pipe.sa_handler = SIG_IGN;
342 sigaction (SIGPIPE, &sa_pipe, NULL);
344 memset (&sa_pipe, 0, sizeof (sa_usr1));
345 sa_usr1.sa_handler = sig_usr1_handler;
346 sigaction (SIGUSR1, &sa_usr1, NULL);
348 memset (&sa_usr2, 0, sizeof (sa_usr2));
349 sa_usr2.sa_handler = sig_usr2_handler;
350 sigaction (SIGUSR2, &sa_usr2, NULL);
352 } /* }}} void install_signal_handlers */
354 static int open_pidfile(char *action, int oflag) /* {{{ */
358 char *file_copy, *dir;
360 file = (config_pid_file != NULL)
362 : LOCALSTATEDIR "/run/rrdcached.pid";
364 /* dirname may modify its argument */
365 file_copy = strdup(file);
366 if (file_copy == NULL)
368 fprintf(stderr, "rrdcached: strdup(): %s\n",
369 rrd_strerror(errno));
373 dir = dirname(file_copy);
374 if (rrd_mkdir_p(dir, 0777) != 0)
376 fprintf(stderr, "Failed to create pidfile directory '%s': %s\n",
377 dir, rrd_strerror(errno));
383 fd = open(file, oflag, S_IWUSR|S_IRUSR|S_IRGRP|S_IROTH);
385 fprintf(stderr, "rrdcached: can't %s pid file '%s' (%s)\n",
386 action, file, rrd_strerror(errno));
389 } /* }}} static int open_pidfile */
391 /* check existing pid file to see whether a daemon is running */
392 static int check_pidfile(void)
398 pid_fd = open_pidfile("open", O_RDWR);
402 if (read(pid_fd, pid_str, sizeof(pid_str)) <= 0)
409 /* another running process that we can signal COULD be
410 * a competing rrdcached */
411 if (pid != getpid() && kill(pid, 0) == 0)
414 "FATAL: Another rrdcached daemon is running?? (pid %d)\n", pid);
419 lseek(pid_fd, 0, SEEK_SET);
420 if (ftruncate(pid_fd, 0) == -1)
423 "FATAL: Faild to truncate stale PID file. (pid %d)\n", pid);
429 "rrdcached: removed stale PID file (no rrdcached on pid %d)\n"
430 "rrdcached: starting normally.\n", pid);
433 } /* }}} static int check_pidfile */
435 static int write_pidfile (int fd) /* {{{ */
442 fh = fdopen (fd, "w");
445 RRDD_LOG (LOG_ERR, "write_pidfile: fdopen() failed.");
450 fprintf (fh, "%i\n", (int) pid);
454 } /* }}} int write_pidfile */
456 static int remove_pidfile (void) /* {{{ */
461 file = (config_pid_file != NULL)
463 : LOCALSTATEDIR "/run/rrdcached.pid";
465 status = unlink (file);
469 } /* }}} int remove_pidfile */
471 static char *next_cmd (listen_socket_t *sock, ssize_t *len) /* {{{ */
475 eol = memchr(sock->rbuf + sock->next_cmd, '\n',
476 sock->next_read - sock->next_cmd);
480 /* no commands left, move remainder back to front of rbuf */
481 memmove(sock->rbuf, sock->rbuf + sock->next_cmd,
482 sock->next_read - sock->next_cmd);
483 sock->next_read -= sock->next_cmd;
490 char *cmd = sock->rbuf + sock->next_cmd;
493 sock->next_cmd = eol - sock->rbuf + 1;
495 if (eol > sock->rbuf && *(eol-1) == '\r')
496 *(--eol) = '\0'; /* handle "\r\n" EOL */
505 } /* }}} char *next_cmd */
507 /* add the characters directly to the write buffer */
508 static int add_to_wbuf(listen_socket_t *sock, char *str, size_t len) /* {{{ */
512 assert(sock != NULL);
514 new_buf = rrd_realloc(sock->wbuf, sock->wbuf_len + len + 1);
517 RRDD_LOG(LOG_ERR, "add_to_wbuf: realloc failed");
521 strncpy(new_buf + sock->wbuf_len, str, len + 1);
523 sock->wbuf = new_buf;
524 sock->wbuf_len += len;
527 } /* }}} static int add_to_wbuf */
529 /* add the text to the "extra" info that's sent after the status line */
530 static int add_response_info(listen_socket_t *sock, char *fmt, ...) /* {{{ */
533 char buffer[CMD_MAX];
536 if (JOURNAL_REPLAY(sock)) return 0;
537 if (sock->batch_start) return 0; /* no extra info returned when in BATCH */
540 #ifdef HAVE_VSNPRINTF
541 len = vsnprintf(buffer, sizeof(buffer), fmt, argp);
543 len = vsprintf(buffer, fmt, argp);
548 RRDD_LOG(LOG_ERR, "add_response_info: vnsprintf failed");
552 return add_to_wbuf(sock, buffer, len);
553 } /* }}} static int add_response_info */
555 static int count_lines(char *str) /* {{{ */
561 while ((str = strchr(str, '\n')) != NULL)
569 } /* }}} static int count_lines */
571 /* send the response back to the user.
572 * returns 0 on success, -1 on error
573 * write buffer is always zeroed after this call */
574 static int send_response (listen_socket_t *sock, response_code rc,
575 char *fmt, ...) /* {{{ */
578 char buffer[CMD_MAX];
583 if (JOURNAL_REPLAY(sock)) return rc;
585 if (sock->batch_start)
588 return rc; /* no response on success during BATCH */
589 lines = sock->batch_cmd;
591 else if (rc == RESP_OK)
592 lines = count_lines(sock->wbuf);
596 rclen = sprintf(buffer, "%d ", lines);
598 #ifdef HAVE_VSNPRINTF
599 len = vsnprintf(buffer+rclen, sizeof(buffer)-rclen, fmt, argp);
601 len = vsprintf(buffer+rclen, fmt, argp);
609 /* append the result to the wbuf, don't write to the user */
610 if (sock->batch_start)
611 return add_to_wbuf(sock, buffer, len);
613 /* first write must be complete */
614 if (len != write(sock->fd, buffer, len))
616 RRDD_LOG(LOG_INFO, "send_response: could not write status message");
620 if (sock->wbuf != NULL && rc == RESP_OK)
623 while (wrote < sock->wbuf_len)
625 ssize_t wb = write(sock->fd, sock->wbuf + wrote, sock->wbuf_len - wrote);
628 RRDD_LOG(LOG_INFO, "send_response: could not write results");
635 free(sock->wbuf); sock->wbuf = NULL;
641 static void wipe_ci_values(cache_item_t *ci, time_t when)
646 ci->last_flush_time = when;
647 if (config_write_jitter > 0)
648 ci->last_flush_time += (rrd_random() % config_write_jitter);
652 * remove a "cache_item_t" item from the queue.
653 * must hold 'cache_lock' when calling this
655 static void remove_from_queue(cache_item_t *ci) /* {{{ */
657 if (ci == NULL) return;
658 if ((ci->flags & CI_FLAGS_IN_QUEUE) == 0) return; /* not queued */
660 if (ci->prev == NULL)
661 cache_queue_head = ci->next; /* reset head */
663 ci->prev->next = ci->next;
665 if (ci->next == NULL)
666 cache_queue_tail = ci->prev; /* reset the tail */
668 ci->next->prev = ci->prev;
670 ci->next = ci->prev = NULL;
671 ci->flags &= ~CI_FLAGS_IN_QUEUE;
673 pthread_mutex_lock (&stats_lock);
674 assert (stats_queue_length > 0);
675 stats_queue_length--;
676 pthread_mutex_unlock (&stats_lock);
678 } /* }}} static void remove_from_queue */
680 /* free the resources associated with the cache_item_t
681 * must hold cache_lock when calling this function
683 static void *free_cache_item(cache_item_t *ci) /* {{{ */
685 if (ci == NULL) return NULL;
687 remove_from_queue(ci);
689 for (size_t i=0; i < ci->values_num; i++)
695 /* in case anyone is waiting */
696 pthread_cond_broadcast(&ci->flushed);
697 pthread_cond_destroy(&ci->flushed);
702 } /* }}} static void *free_cache_item */
705 * enqueue_cache_item:
706 * `cache_lock' must be acquired before calling this function!
708 static int enqueue_cache_item (cache_item_t *ci, /* {{{ */
714 if (ci->values_num == 0)
719 if (cache_queue_head == ci)
722 /* remove if further down in queue */
723 remove_from_queue(ci);
726 ci->next = cache_queue_head;
727 if (ci->next != NULL)
729 cache_queue_head = ci;
731 if (cache_queue_tail == NULL)
732 cache_queue_tail = cache_queue_head;
734 else /* (side == TAIL) */
736 /* We don't move values back in the list.. */
737 if (ci->flags & CI_FLAGS_IN_QUEUE)
740 assert (ci->next == NULL);
741 assert (ci->prev == NULL);
743 ci->prev = cache_queue_tail;
745 if (cache_queue_tail == NULL)
746 cache_queue_head = ci;
748 cache_queue_tail->next = ci;
750 cache_queue_tail = ci;
753 ci->flags |= CI_FLAGS_IN_QUEUE;
755 pthread_cond_signal(&queue_cond);
756 pthread_mutex_lock (&stats_lock);
757 stats_queue_length++;
758 pthread_mutex_unlock (&stats_lock);
761 } /* }}} int enqueue_cache_item */
764 * tree_callback_flush:
765 * Called via `g_tree_foreach' in `flush_thread_main'. `cache_lock' is held
766 * while this is in progress.
768 static gboolean tree_callback_flush (gpointer key, gpointer value, /* {{{ */
772 callback_flush_data_t *cfd;
774 ci = (cache_item_t *) value;
775 cfd = (callback_flush_data_t *) data;
777 if (ci->flags & CI_FLAGS_IN_QUEUE)
780 if (ci->values_num > 0
781 && (ci->last_flush_time <= cfd->abs_timeout || state != RUNNING))
783 enqueue_cache_item (ci, TAIL);
785 else if (((cfd->now - ci->last_flush_time) >= config_flush_interval)
786 && (ci->values_num <= 0))
788 assert ((char *) key == ci->file);
789 if (!rrd_add_ptr((void ***)&cfd->keys, &cfd->keys_num, (void *)key))
791 RRDD_LOG (LOG_ERR, "tree_callback_flush: rrd_add_ptrs failed.");
797 } /* }}} gboolean tree_callback_flush */
799 static int flush_old_values (int max_age)
801 callback_flush_data_t cfd;
804 memset (&cfd, 0, sizeof (cfd));
805 /* Pass the current time as user data so that we don't need to call
806 * `time' for each node. */
807 cfd.now = time (NULL);
812 cfd.abs_timeout = cfd.now - max_age;
814 cfd.abs_timeout = cfd.now + 2*config_write_jitter + 1;
816 /* `tree_callback_flush' will return the keys of all values that haven't
817 * been touched in the last `config_flush_interval' seconds in `cfd'.
818 * The char*'s in this array point to the same memory as ci->file, so we
819 * don't need to free them separately. */
820 g_tree_foreach (cache_tree, tree_callback_flush, (gpointer) &cfd);
822 for (k = 0; k < cfd.keys_num; k++)
824 /* should never fail, since we have held the cache_lock
826 assert( g_tree_remove(cache_tree, cfd.keys[k]) == TRUE );
829 if (cfd.keys != NULL)
836 } /* int flush_old_values */
838 static void *flush_thread_main (void *args __attribute__((unused))) /* {{{ */
841 struct timespec next_flush;
844 gettimeofday (&now, NULL);
845 next_flush.tv_sec = now.tv_sec + config_flush_interval;
846 next_flush.tv_nsec = 1000 * now.tv_usec;
848 pthread_mutex_lock(&cache_lock);
850 while (state == RUNNING)
852 gettimeofday (&now, NULL);
853 if ((now.tv_sec > next_flush.tv_sec)
854 || ((now.tv_sec == next_flush.tv_sec)
855 && ((1000 * now.tv_usec) > next_flush.tv_nsec)))
857 RRDD_LOG(LOG_DEBUG, "flushing old values");
859 /* Determine the time of the next cache flush. */
860 next_flush.tv_sec = now.tv_sec + config_flush_interval;
862 /* Flush all values that haven't been written in the last
863 * `config_write_interval' seconds. */
864 flush_old_values (config_write_interval);
866 /* unlock the cache while we rotate so we don't block incoming
867 * updates if the fsync() blocks on disk I/O */
868 pthread_mutex_unlock(&cache_lock);
870 pthread_mutex_lock(&cache_lock);
873 status = pthread_cond_timedwait(&flush_cond, &cache_lock, &next_flush);
874 if (status != 0 && status != ETIMEDOUT)
876 RRDD_LOG (LOG_ERR, "flush_thread_main: "
877 "pthread_cond_timedwait returned %i.", status);
881 if (config_flush_at_shutdown)
882 flush_old_values (-1); /* flush everything */
886 pthread_mutex_unlock(&cache_lock);
889 } /* void *flush_thread_main */
891 static void *queue_thread_main (void *args __attribute__((unused))) /* {{{ */
893 pthread_mutex_lock (&cache_lock);
895 while (state != SHUTDOWN
896 || (cache_queue_head != NULL && config_flush_at_shutdown))
904 /* Now, check if there's something to store away. If not, wait until
905 * something comes in. */
906 if (cache_queue_head == NULL)
908 status = pthread_cond_wait (&queue_cond, &cache_lock);
909 if ((status != 0) && (status != ETIMEDOUT))
911 RRDD_LOG (LOG_ERR, "queue_thread_main: "
912 "pthread_cond_wait returned %i.", status);
916 /* Check if a value has arrived. This may be NULL if we timed out or there
917 * was an interrupt such as a signal. */
918 if (cache_queue_head == NULL)
921 ci = cache_queue_head;
923 /* copy the relevant parts */
924 file = strdup (ci->file);
927 RRDD_LOG (LOG_ERR, "queue_thread_main: strdup failed.");
931 assert(ci->values != NULL);
932 assert(ci->values_num > 0);
935 values_num = ci->values_num;
937 wipe_ci_values(ci, time(NULL));
938 remove_from_queue(ci);
940 pthread_mutex_unlock (&cache_lock);
943 status = rrd_update_r (file, NULL, (int) values_num, (void *) values);
946 RRDD_LOG (LOG_NOTICE, "queue_thread_main: "
947 "rrd_update_r (%s) failed with status %i. (%s)",
948 file, status, rrd_get_error());
951 journal_write("wrote", file);
953 /* Search again in the tree. It's possible someone issued a "FORGET"
954 * while we were writing the update values. */
955 pthread_mutex_lock(&cache_lock);
956 ci = (cache_item_t *) g_tree_lookup(cache_tree, file);
958 pthread_cond_broadcast(&ci->flushed);
959 pthread_mutex_unlock(&cache_lock);
963 pthread_mutex_lock (&stats_lock);
964 stats_updates_written++;
965 stats_data_sets_written += values_num;
966 pthread_mutex_unlock (&stats_lock);
969 rrd_free_ptrs((void ***) &values, &values_num);
972 pthread_mutex_lock (&cache_lock);
974 pthread_mutex_unlock (&cache_lock);
977 } /* }}} void *queue_thread_main */
979 static int buffer_get_field (char **buffer_ret, /* {{{ */
980 size_t *buffer_size_ret, char **field_ret)
989 buffer = *buffer_ret;
991 buffer_size = *buffer_size_ret;
995 if (buffer_size <= 0)
998 /* This is ensured by `handle_request'. */
999 assert (buffer[buffer_size - 1] == '\0');
1002 while (buffer_pos < buffer_size)
1004 /* Check for end-of-field or end-of-buffer */
1005 if (buffer[buffer_pos] == ' ' || buffer[buffer_pos] == '\0')
1007 field[field_size] = 0;
1013 /* Handle escaped characters. */
1014 else if (buffer[buffer_pos] == '\\')
1016 if (buffer_pos >= (buffer_size - 1))
1019 field[field_size] = buffer[buffer_pos];
1023 /* Normal operation */
1026 field[field_size] = buffer[buffer_pos];
1030 } /* while (buffer_pos < buffer_size) */
1035 *buffer_ret = buffer + buffer_pos;
1036 *buffer_size_ret = buffer_size - buffer_pos;
1040 } /* }}} int buffer_get_field */
1042 /* if we're restricting writes to the base directory,
1043 * check whether the file falls within the dir
1044 * returns 1 if OK, otherwise 0
1046 static int check_file_access (const char *file, listen_socket_t *sock) /* {{{ */
1048 assert(file != NULL);
1050 if (!config_write_base_only
1051 || JOURNAL_REPLAY(sock)
1052 || config_base_dir == NULL)
1055 if (strstr(file, "../") != NULL) goto err;
1057 /* relative paths without "../" are ok */
1058 if (*file != '/') return 1;
1060 /* file must be of the format base + "/" + <1+ char filename> */
1061 if (strlen(file) < _config_base_dir_len + 2) goto err;
1062 if (strncmp(file, config_base_dir, _config_base_dir_len) != 0) goto err;
1063 if (*(file + _config_base_dir_len) != '/') goto err;
1068 if (sock != NULL && sock->fd >= 0)
1069 send_response(sock, RESP_ERR, "%s\n", rrd_strerror(EACCES));
1072 } /* }}} static int check_file_access */
1074 /* when using a base dir, convert relative paths to absolute paths.
1075 * if necessary, modifies the "filename" pointer to point
1076 * to the new path created in "tmp". "tmp" is provided
1077 * by the caller and sizeof(tmp) must be >= PATH_MAX.
1079 * this allows us to optimize for the expected case (absolute path)
1082 static void get_abs_path(char **filename, char *tmp)
1084 assert(tmp != NULL);
1085 assert(filename != NULL && *filename != NULL);
1087 if (config_base_dir == NULL || **filename == '/')
1090 snprintf(tmp, PATH_MAX, "%s/%s", config_base_dir, *filename);
1092 } /* }}} static int get_abs_path */
1094 static int flush_file (const char *filename) /* {{{ */
1098 pthread_mutex_lock (&cache_lock);
1100 ci = (cache_item_t *) g_tree_lookup (cache_tree, filename);
1103 pthread_mutex_unlock (&cache_lock);
1107 if (ci->values_num > 0)
1109 /* Enqueue at head */
1110 enqueue_cache_item (ci, HEAD);
1111 pthread_cond_wait(&ci->flushed, &cache_lock);
1114 /* DO NOT DO ANYTHING WITH ci HERE!! The entry
1115 * may have been purged during our cond_wait() */
1117 pthread_mutex_unlock(&cache_lock);
1120 } /* }}} int flush_file */
1122 static int syntax_error(listen_socket_t *sock, command_t *cmd) /* {{{ */
1124 char *err = "Syntax error.\n";
1126 if (cmd && cmd->syntax)
1129 return send_response(sock, RESP_ERR, "Usage: %s", err);
1130 } /* }}} static int syntax_error() */
1132 static int handle_request_stats (HANDLER_PROTO) /* {{{ */
1134 uint64_t copy_queue_length;
1135 uint64_t copy_updates_received;
1136 uint64_t copy_flush_received;
1137 uint64_t copy_updates_written;
1138 uint64_t copy_data_sets_written;
1139 uint64_t copy_journal_bytes;
1140 uint64_t copy_journal_rotate;
1142 uint64_t tree_nodes_number;
1143 uint64_t tree_depth;
1145 pthread_mutex_lock (&stats_lock);
1146 copy_queue_length = stats_queue_length;
1147 copy_updates_received = stats_updates_received;
1148 copy_flush_received = stats_flush_received;
1149 copy_updates_written = stats_updates_written;
1150 copy_data_sets_written = stats_data_sets_written;
1151 copy_journal_bytes = stats_journal_bytes;
1152 copy_journal_rotate = stats_journal_rotate;
1153 pthread_mutex_unlock (&stats_lock);
1155 pthread_mutex_lock (&cache_lock);
1156 tree_nodes_number = (uint64_t) g_tree_nnodes (cache_tree);
1157 tree_depth = (uint64_t) g_tree_height (cache_tree);
1158 pthread_mutex_unlock (&cache_lock);
1160 add_response_info(sock,
1161 "QueueLength: %"PRIu64"\n", copy_queue_length);
1162 add_response_info(sock,
1163 "UpdatesReceived: %"PRIu64"\n", copy_updates_received);
1164 add_response_info(sock,
1165 "FlushesReceived: %"PRIu64"\n", copy_flush_received);
1166 add_response_info(sock,
1167 "UpdatesWritten: %"PRIu64"\n", copy_updates_written);
1168 add_response_info(sock,
1169 "DataSetsWritten: %"PRIu64"\n", copy_data_sets_written);
1170 add_response_info(sock, "TreeNodesNumber: %"PRIu64"\n", tree_nodes_number);
1171 add_response_info(sock, "TreeDepth: %"PRIu64"\n", tree_depth);
1172 add_response_info(sock, "JournalBytes: %"PRIu64"\n", copy_journal_bytes);
1173 add_response_info(sock, "JournalRotate: %"PRIu64"\n", copy_journal_rotate);
1175 send_response(sock, RESP_OK, "Statistics follow\n");
1178 } /* }}} int handle_request_stats */
1180 static int handle_request_flush (HANDLER_PROTO) /* {{{ */
1182 char *file, file_tmp[PATH_MAX];
1185 status = buffer_get_field (&buffer, &buffer_size, &file);
1188 return syntax_error(sock,cmd);
1192 pthread_mutex_lock(&stats_lock);
1193 stats_flush_received++;
1194 pthread_mutex_unlock(&stats_lock);
1196 get_abs_path(&file, file_tmp);
1197 if (!check_file_access(file, sock)) return 0;
1199 status = flush_file (file);
1201 return send_response(sock, RESP_OK, "Successfully flushed %s.\n", file);
1202 else if (status == ENOENT)
1204 /* no file in our tree; see whether it exists at all */
1205 struct stat statbuf;
1207 memset(&statbuf, 0, sizeof(statbuf));
1208 if (stat(file, &statbuf) == 0 && S_ISREG(statbuf.st_mode))
1209 return send_response(sock, RESP_OK, "Nothing to flush: %s.\n", file);
1211 return send_response(sock, RESP_ERR, "No such file: %s.\n", file);
1213 else if (status < 0)
1214 return send_response(sock, RESP_ERR, "Internal error.\n");
1216 return send_response(sock, RESP_ERR, "Failed with status %i.\n", status);
1221 } /* }}} int handle_request_flush */
1223 static int handle_request_flushall(HANDLER_PROTO) /* {{{ */
1225 RRDD_LOG(LOG_DEBUG, "Received FLUSHALL");
1227 pthread_mutex_lock(&cache_lock);
1228 flush_old_values(-1);
1229 pthread_mutex_unlock(&cache_lock);
1231 return send_response(sock, RESP_OK, "Started flush.\n");
1232 } /* }}} static int handle_request_flushall */
1234 static int handle_request_pending(HANDLER_PROTO) /* {{{ */
1237 char *file, file_tmp[PATH_MAX];
1240 status = buffer_get_field(&buffer, &buffer_size, &file);
1242 return syntax_error(sock,cmd);
1244 get_abs_path(&file, file_tmp);
1246 pthread_mutex_lock(&cache_lock);
1247 ci = g_tree_lookup(cache_tree, file);
1250 pthread_mutex_unlock(&cache_lock);
1251 return send_response(sock, RESP_ERR, "%s\n", rrd_strerror(ENOENT));
1254 for (size_t i=0; i < ci->values_num; i++)
1255 add_response_info(sock, "%s\n", ci->values[i]);
1257 pthread_mutex_unlock(&cache_lock);
1258 return send_response(sock, RESP_OK, "updates pending\n");
1259 } /* }}} static int handle_request_pending */
1261 static int handle_request_forget(HANDLER_PROTO) /* {{{ */
1265 char *file, file_tmp[PATH_MAX];
1267 status = buffer_get_field(&buffer, &buffer_size, &file);
1269 return syntax_error(sock,cmd);
1271 get_abs_path(&file, file_tmp);
1272 if (!check_file_access(file, sock)) return 0;
1274 pthread_mutex_lock(&cache_lock);
1275 found = g_tree_remove(cache_tree, file);
1276 pthread_mutex_unlock(&cache_lock);
1280 if (!JOURNAL_REPLAY(sock))
1281 journal_write("forget", file);
1283 return send_response(sock, RESP_OK, "Gone!\n");
1286 return send_response(sock, RESP_ERR, "%s\n", rrd_strerror(ENOENT));
1290 } /* }}} static int handle_request_forget */
1292 static int handle_request_queue (HANDLER_PROTO) /* {{{ */
1296 pthread_mutex_lock(&cache_lock);
1298 ci = cache_queue_head;
1301 add_response_info(sock, "%d %s\n", ci->values_num, ci->file);
1305 pthread_mutex_unlock(&cache_lock);
1307 return send_response(sock, RESP_OK, "in queue.\n");
1308 } /* }}} int handle_request_queue */
1310 static int handle_request_update (HANDLER_PROTO) /* {{{ */
1312 char *file, file_tmp[PATH_MAX];
1315 char orig_buf[CMD_MAX];
1319 /* save it for the journal later */
1320 if (!JOURNAL_REPLAY(sock))
1321 strncpy(orig_buf, buffer, buffer_size);
1323 status = buffer_get_field (&buffer, &buffer_size, &file);
1325 return syntax_error(sock,cmd);
1327 pthread_mutex_lock(&stats_lock);
1328 stats_updates_received++;
1329 pthread_mutex_unlock(&stats_lock);
1331 get_abs_path(&file, file_tmp);
1332 if (!check_file_access(file, sock)) return 0;
1334 pthread_mutex_lock (&cache_lock);
1335 ci = g_tree_lookup (cache_tree, file);
1337 if (ci == NULL) /* {{{ */
1339 struct stat statbuf;
1342 /* don't hold the lock while we setup; stat(2) might block */
1343 pthread_mutex_unlock(&cache_lock);
1345 memset (&statbuf, 0, sizeof (statbuf));
1346 status = stat (file, &statbuf);
1349 RRDD_LOG (LOG_NOTICE, "handle_request_update: stat (%s) failed.", file);
1352 if (status == ENOENT)
1353 return send_response(sock, RESP_ERR, "No such file: %s\n", file);
1355 return send_response(sock, RESP_ERR,
1356 "stat failed with error %i.\n", status);
1358 if (!S_ISREG (statbuf.st_mode))
1359 return send_response(sock, RESP_ERR, "Not a regular file: %s\n", file);
1361 if (access(file, R_OK|W_OK) != 0)
1362 return send_response(sock, RESP_ERR, "Cannot read/write %s: %s\n",
1363 file, rrd_strerror(errno));
1365 ci = (cache_item_t *) malloc (sizeof (cache_item_t));
1368 RRDD_LOG (LOG_ERR, "handle_request_update: malloc failed.");
1370 return send_response(sock, RESP_ERR, "malloc failed.\n");
1372 memset (ci, 0, sizeof (cache_item_t));
1374 ci->file = strdup (file);
1375 if (ci->file == NULL)
1378 RRDD_LOG (LOG_ERR, "handle_request_update: strdup failed.");
1380 return send_response(sock, RESP_ERR, "strdup failed.\n");
1383 wipe_ci_values(ci, now);
1384 ci->flags = CI_FLAGS_IN_TREE;
1385 pthread_cond_init(&ci->flushed, NULL);
1387 pthread_mutex_lock(&cache_lock);
1389 /* another UPDATE might have added this entry in the meantime */
1390 tmp = g_tree_lookup (cache_tree, file);
1392 g_tree_replace (cache_tree, (void *) ci->file, (void *) ci);
1395 free_cache_item (ci);
1399 /* state may have changed while we were unlocked */
1400 if (state == SHUTDOWN)
1403 assert (ci != NULL);
1405 /* don't re-write updates in replay mode */
1406 if (!JOURNAL_REPLAY(sock))
1407 journal_write("update", orig_buf);
1409 while (buffer_size > 0)
1415 status = buffer_get_field (&buffer, &buffer_size, &value);
1418 RRDD_LOG (LOG_INFO, "handle_request_update: Error reading field.");
1422 /* make sure update time is always moving forward */
1423 stamp = strtol(value, &eostamp, 10);
1424 if (eostamp == value || eostamp == NULL || *eostamp != ':')
1426 pthread_mutex_unlock(&cache_lock);
1427 return send_response(sock, RESP_ERR,
1428 "Cannot find timestamp in '%s'!\n", value);
1430 else if (stamp <= ci->last_update_stamp)
1432 pthread_mutex_unlock(&cache_lock);
1433 return send_response(sock, RESP_ERR,
1434 "illegal attempt to update using time %ld when last"
1435 " update time is %ld (minimum one second step)\n",
1436 stamp, ci->last_update_stamp);
1439 ci->last_update_stamp = stamp;
1441 if (!rrd_add_strdup(&ci->values, &ci->values_num, value))
1443 RRDD_LOG (LOG_ERR, "handle_request_update: rrd_add_strdup failed.");
1450 if (((now - ci->last_flush_time) >= config_write_interval)
1451 && ((ci->flags & CI_FLAGS_IN_QUEUE) == 0)
1452 && (ci->values_num > 0))
1454 enqueue_cache_item (ci, TAIL);
1457 pthread_mutex_unlock (&cache_lock);
1460 return send_response(sock, RESP_ERR, "No values updated.\n");
1462 return send_response(sock, RESP_OK,
1463 "errors, enqueued %i value(s).\n", values_num);
1468 } /* }}} int handle_request_update */
1470 /* we came across a "WROTE" entry during journal replay.
1471 * throw away any values that we have accumulated for this file
1473 static int handle_request_wrote (HANDLER_PROTO) /* {{{ */
1476 const char *file = buffer;
1478 pthread_mutex_lock(&cache_lock);
1480 ci = g_tree_lookup(cache_tree, file);
1483 pthread_mutex_unlock(&cache_lock);
1488 rrd_free_ptrs((void ***) &ci->values, &ci->values_num);
1490 wipe_ci_values(ci, now);
1491 remove_from_queue(ci);
1493 pthread_mutex_unlock(&cache_lock);
1495 } /* }}} int handle_request_wrote */
1497 /* start "BATCH" processing */
1498 static int batch_start (HANDLER_PROTO) /* {{{ */
1501 if (sock->batch_start)
1502 return send_response(sock, RESP_ERR, "Already in BATCH\n");
1504 status = send_response(sock, RESP_OK,
1505 "Go ahead. End with dot '.' on its own line.\n");
1506 sock->batch_start = time(NULL);
1507 sock->batch_cmd = 0;
1510 } /* }}} static int batch_start */
1512 /* finish "BATCH" processing and return results to the client */
1513 static int batch_done (HANDLER_PROTO) /* {{{ */
1515 assert(sock->batch_start);
1516 sock->batch_start = 0;
1517 sock->batch_cmd = 0;
1518 return send_response(sock, RESP_OK, "errors\n");
1519 } /* }}} static int batch_done */
1521 static int handle_request_quit (HANDLER_PROTO) /* {{{ */
1524 } /* }}} static int handle_request_quit */
1526 static command_t list_of_commands[] = { /* {{{ */
1529 handle_request_update,
1531 "UPDATE <filename> <values> [<values> ...]\n"
1533 "Adds the given file to the internal cache if it is not yet known and\n"
1534 "appends the given value(s) to the entry. See the rrdcached(1) manpage\n"
1537 "Each <values> has the following form:\n"
1538 " <values> = <time>:<value>[:<value>[...]]\n"
1539 "See the rrdupdate(1) manpage for details.\n"
1543 handle_request_wrote,
1544 CMD_CONTEXT_JOURNAL,
1550 handle_request_flush,
1551 CMD_CONTEXT_CLIENT | CMD_CONTEXT_BATCH,
1552 "FLUSH <filename>\n"
1554 "Adds the given filename to the head of the update queue and returns\n"
1555 "after it has been dequeued.\n"
1559 handle_request_flushall,
1563 "Triggers writing of all pending updates. Returns immediately.\n"
1567 handle_request_pending,
1569 "PENDING <filename>\n"
1571 "Shows any 'pending' updates for a file, in order.\n"
1572 "The updates shown have not yet been written to the underlying RRD file.\n"
1576 handle_request_forget,
1578 "FORGET <filename>\n"
1580 "Removes the file completely from the cache.\n"
1581 "Any pending updates for the file will be lost.\n"
1585 handle_request_queue,
1589 "Shows all files in the output queue.\n"
1590 "The output is zero or more lines in the following format:\n"
1591 "(where <num_vals> is the number of values to be written)\n"
1593 "<num_vals> <filename>\n"
1597 handle_request_stats,
1601 "Returns some performance counters, see the rrdcached(1) manpage for\n"
1602 "a description of the values.\n"
1606 handle_request_help,
1608 "HELP [<command>]\n",
1609 NULL, /* special! */
1617 "The 'BATCH' command permits the client to initiate a bulk load\n"
1618 " of commands to rrdcached.\n"
1623 " server: 0 Go ahead. End with dot '.' on its own line.\n"
1624 " client: command #1\n"
1625 " client: command #2\n"
1626 " client: ... and so on\n"
1628 " server: 2 errors\n"
1629 " server: 7 message for command #7\n"
1630 " server: 9 message for command #9\n"
1632 "For more information, consult the rrdcached(1) documentation.\n"
1635 ".", /* BATCH terminator */
1643 handle_request_quit,
1644 CMD_CONTEXT_CLIENT | CMD_CONTEXT_BATCH,
1647 "Disconnect from rrdcached.\n"
1649 }; /* }}} command_t list_of_commands[] */
1650 static size_t list_of_commands_len = sizeof (list_of_commands)
1651 / sizeof (list_of_commands[0]);
1653 static command_t *find_command(char *cmd)
1657 for (i = 0; i < list_of_commands_len; i++)
1658 if (strcasecmp(cmd, list_of_commands[i].cmd) == 0)
1659 return (&list_of_commands[i]);
1663 /* We currently use the index in the `list_of_commands' array as a bit position
1664 * in `listen_socket_t.permissions'. This member schould NEVER be accessed from
1665 * outside these functions so that switching to a more elegant storage method
1666 * is easily possible. */
1667 static ssize_t find_command_index (const char *cmd) /* {{{ */
1671 for (i = 0; i < list_of_commands_len; i++)
1672 if (strcasecmp(cmd, list_of_commands[i].cmd) == 0)
1673 return ((ssize_t) i);
1675 } /* }}} ssize_t find_command_index */
1677 static int socket_permission_check (listen_socket_t *sock, /* {{{ */
1682 if (JOURNAL_REPLAY(sock))
1688 if ((strcasecmp ("QUIT", cmd) == 0)
1689 || (strcasecmp ("HELP", cmd) == 0))
1691 else if (strcmp (".", cmd) == 0)
1694 i = find_command_index (cmd);
1699 if ((sock->permissions & (1 << i)) != 0)
1702 } /* }}} int socket_permission_check */
1704 static int socket_permission_add (listen_socket_t *sock, /* {{{ */
1709 i = find_command_index (cmd);
1714 sock->permissions |= (1 << i);
1716 } /* }}} int socket_permission_add */
1718 /* check whether commands are received in the expected context */
1719 static int command_check_context(listen_socket_t *sock, command_t *cmd)
1721 if (JOURNAL_REPLAY(sock))
1722 return (cmd->context & CMD_CONTEXT_JOURNAL);
1723 else if (sock->batch_start)
1724 return (cmd->context & CMD_CONTEXT_BATCH);
1726 return (cmd->context & CMD_CONTEXT_CLIENT);
1732 static int handle_request_help (HANDLER_PROTO) /* {{{ */
1737 command_t *help = NULL;
1739 status = buffer_get_field (&buffer, &buffer_size, &cmd_str);
1741 help = find_command(cmd_str);
1743 if (help && (help->syntax || help->help))
1747 snprintf(tmp, sizeof(tmp)-1, "Help for %s\n", help->cmd);
1751 add_response_info(sock, "Usage: %s\n", help->syntax);
1754 add_response_info(sock, "%s\n", help->help);
1760 resp_txt = "Command overview\n";
1762 for (i = 0; i < list_of_commands_len; i++)
1764 if (list_of_commands[i].syntax == NULL)
1766 add_response_info (sock, "%s", list_of_commands[i].syntax);
1770 return send_response(sock, RESP_OK, resp_txt);
1771 } /* }}} int handle_request_help */
1773 static int handle_request (DISPATCH_PROTO) /* {{{ */
1775 char *buffer_ptr = buffer;
1776 char *cmd_str = NULL;
1777 command_t *cmd = NULL;
1780 assert (buffer[buffer_size - 1] == '\0');
1782 status = buffer_get_field (&buffer_ptr, &buffer_size, &cmd_str);
1785 RRDD_LOG (LOG_INFO, "handle_request: Unable parse command.");
1789 if (sock != NULL && sock->batch_start)
1792 cmd = find_command(cmd_str);
1794 return send_response(sock, RESP_ERR, "Unknown command: %s\n", cmd_str);
1796 if (!socket_permission_check (sock, cmd->cmd))
1797 return send_response(sock, RESP_ERR, "Permission denied.\n");
1799 if (!command_check_context(sock, cmd))
1800 return send_response(sock, RESP_ERR, "Can't use '%s' here.\n", cmd_str);
1802 return cmd->handler(cmd, sock, now, buffer_ptr, buffer_size);
1803 } /* }}} int handle_request */
1805 static void journal_set_free (journal_set *js) /* {{{ */
1810 rrd_free_ptrs((void ***) &js->files, &js->files_num);
1813 } /* }}} journal_set_free */
1815 static void journal_set_remove (journal_set *js) /* {{{ */
1820 for (uint i=0; i < js->files_num; i++)
1822 RRDD_LOG(LOG_DEBUG, "removing old journal %s", js->files[i]);
1823 unlink(js->files[i]);
1825 } /* }}} journal_set_remove */
1827 /* close current journal file handle.
1828 * MUST hold journal_lock before calling */
1829 static void journal_close(void) /* {{{ */
1831 if (journal_fh != NULL)
1833 if (fclose(journal_fh) != 0)
1834 RRDD_LOG(LOG_ERR, "cannot close journal: %s", rrd_strerror(errno));
1839 } /* }}} journal_close */
1841 /* MUST hold journal_lock before calling */
1842 static void journal_new_file(void) /* {{{ */
1846 char new_file[PATH_MAX + 1];
1848 assert(journal_dir != NULL);
1849 assert(journal_cur != NULL);
1853 gettimeofday(&now, NULL);
1854 /* this format assures that the files sort in strcmp() order */
1855 snprintf(new_file, PATH_MAX, "%s/%s.%010d.%06d",
1856 journal_dir, JOURNAL_BASE, (int)now.tv_sec, (int)now.tv_usec);
1858 new_fd = open(new_file, O_WRONLY|O_CREAT|O_APPEND,
1859 S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
1863 journal_fh = fdopen(new_fd, "a");
1864 if (journal_fh == NULL)
1867 journal_size = ftell(journal_fh);
1868 RRDD_LOG(LOG_DEBUG, "started new journal %s", new_file);
1870 /* record the file in the journal set */
1871 rrd_add_strdup(&journal_cur->files, &journal_cur->files_num, new_file);
1877 "JOURNALING DISABLED: Error while trying to create %s : %s",
1878 new_file, rrd_strerror(errno));
1880 "JOURNALING DISABLED: All values will be flushed at shutdown");
1883 config_flush_at_shutdown = 1;
1885 } /* }}} journal_new_file */
1887 /* MUST NOT hold journal_lock before calling this */
1888 static void journal_rotate(void) /* {{{ */
1890 journal_set *old_js = NULL;
1892 if (journal_dir == NULL)
1895 RRDD_LOG(LOG_DEBUG, "rotating journals");
1897 pthread_mutex_lock(&stats_lock);
1898 ++stats_journal_rotate;
1899 pthread_mutex_unlock(&stats_lock);
1901 pthread_mutex_lock(&journal_lock);
1905 /* rotate the journal sets */
1906 old_js = journal_old;
1907 journal_old = journal_cur;
1908 journal_cur = calloc(1, sizeof(journal_set));
1910 if (journal_cur != NULL)
1913 RRDD_LOG(LOG_CRIT, "journal_rotate: malloc(journal_set) failed\n");
1915 pthread_mutex_unlock(&journal_lock);
1917 journal_set_remove(old_js);
1918 journal_set_free (old_js);
1920 } /* }}} static void journal_rotate */
1922 /* MUST hold journal_lock when calling */
1923 static void journal_done(void) /* {{{ */
1925 if (journal_cur == NULL)
1930 if (config_flush_at_shutdown)
1932 RRDD_LOG(LOG_INFO, "removing journals");
1933 journal_set_remove(journal_old);
1934 journal_set_remove(journal_cur);
1938 RRDD_LOG(LOG_INFO, "expedited shutdown; "
1939 "journals will be used at next startup");
1942 journal_set_free(journal_cur);
1943 journal_set_free(journal_old);
1946 } /* }}} static void journal_done */
1948 static int journal_write(char *cmd, char *args) /* {{{ */
1952 if (journal_fh == NULL)
1955 pthread_mutex_lock(&journal_lock);
1956 chars = fprintf(journal_fh, "%s %s\n", cmd, args);
1957 journal_size += chars;
1959 if (journal_size > JOURNAL_MAX)
1962 pthread_mutex_unlock(&journal_lock);
1966 pthread_mutex_lock(&stats_lock);
1967 stats_journal_bytes += chars;
1968 pthread_mutex_unlock(&stats_lock);
1972 } /* }}} static int journal_write */
1974 static int journal_replay (const char *file) /* {{{ */
1980 char entry[CMD_MAX];
1983 if (file == NULL) return 0;
1986 char *reason = "unknown error";
1988 struct stat statbuf;
1990 memset(&statbuf, 0, sizeof(statbuf));
1991 if (stat(file, &statbuf) != 0)
1993 reason = "stat error";
1996 else if (!S_ISREG(statbuf.st_mode))
1998 reason = "not a regular file";
2001 if (statbuf.st_uid != daemon_uid)
2003 reason = "not owned by daemon user";
2006 if (statbuf.st_mode & (S_IWGRP|S_IWOTH))
2008 reason = "must not be user/group writable";
2014 RRDD_LOG(LOG_ERR, "journal_replay: %s : %s (%s)",
2015 file, rrd_strerror(status), reason);
2020 fh = fopen(file, "r");
2023 if (errno != ENOENT)
2024 RRDD_LOG(LOG_ERR, "journal_replay: cannot open journal file: '%s' (%s)",
2025 file, rrd_strerror(errno));
2029 RRDD_LOG(LOG_NOTICE, "replaying from journal: %s", file);
2038 if (fgets(entry, sizeof(entry), fh) == NULL)
2040 entry_len = strlen(entry);
2042 /* check \n termination in case journal writing crashed mid-line */
2045 else if (entry[entry_len - 1] != '\n')
2047 RRDD_LOG(LOG_NOTICE, "Malformed journal entry at line %"PRIu64, line);
2052 entry[entry_len - 1] = '\0';
2054 if (handle_request(NULL, now, entry, entry_len) == 0)
2062 RRDD_LOG(LOG_INFO, "Replayed %d entries (%d failures)",
2063 entry_cnt, fail_cnt);
2065 return entry_cnt > 0 ? 1 : 0;
2066 } /* }}} static int journal_replay */
2068 static int journal_sort(const void *v1, const void *v2)
2070 char **jn1 = (char **) v1;
2071 char **jn2 = (char **) v2;
2073 return strcmp(*jn1,*jn2);
2076 static void journal_init(void) /* {{{ */
2078 int had_journal = 0;
2080 struct dirent *dent;
2081 char path[PATH_MAX+1];
2083 if (journal_dir == NULL) return;
2085 pthread_mutex_lock(&journal_lock);
2087 journal_cur = calloc(1, sizeof(journal_set));
2088 if (journal_cur == NULL)
2090 RRDD_LOG(LOG_CRIT, "journal_rotate: malloc(journal_set) failed\n");
2094 RRDD_LOG(LOG_INFO, "checking for journal files");
2096 /* Handle old journal files during transition. This gives them the
2097 * correct sort order. TODO: remove after first release
2100 char old_path[PATH_MAX+1];
2101 snprintf(old_path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE ".old" );
2102 snprintf(path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE ".0000");
2103 rename(old_path, path);
2105 snprintf(old_path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE );
2106 snprintf(path, PATH_MAX, "%s/%s", journal_dir, JOURNAL_BASE ".0001");
2107 rename(old_path, path);
2110 dir = opendir(journal_dir);
2111 while ((dent = readdir(dir)) != NULL)
2113 /* looks like a journal file? */
2114 if (strncmp(dent->d_name, JOURNAL_BASE, strlen(JOURNAL_BASE)))
2117 snprintf(path, PATH_MAX, "%s/%s", journal_dir, dent->d_name);
2119 if (!rrd_add_strdup(&journal_cur->files, &journal_cur->files_num, path))
2121 RRDD_LOG(LOG_CRIT, "journal_init: cannot add journal file %s!",
2128 qsort(journal_cur->files, journal_cur->files_num,
2129 sizeof(journal_cur->files[0]), journal_sort);
2131 for (uint i=0; i < journal_cur->files_num; i++)
2132 had_journal += journal_replay(journal_cur->files[i]);
2136 /* it must have been a crash. start a flush */
2137 if (had_journal && config_flush_at_shutdown)
2138 flush_old_values(-1);
2140 pthread_mutex_unlock(&journal_lock);
2142 RRDD_LOG(LOG_INFO, "journal processing complete");
2144 } /* }}} static void journal_init */
2146 static void free_listen_socket(listen_socket_t *sock) /* {{{ */
2148 assert(sock != NULL);
2150 free(sock->rbuf); sock->rbuf = NULL;
2151 free(sock->wbuf); sock->wbuf = NULL;
2153 } /* }}} void free_listen_socket */
2155 static void close_connection(listen_socket_t *sock) /* {{{ */
2163 free_listen_socket(sock);
2165 } /* }}} void close_connection */
2167 static void *connection_thread_main (void *args) /* {{{ */
2169 listen_socket_t *sock;
2172 sock = (listen_socket_t *) args;
2175 /* init read buffers */
2176 sock->next_read = sock->next_cmd = 0;
2177 sock->rbuf = malloc(RBUF_SIZE);
2178 if (sock->rbuf == NULL)
2180 RRDD_LOG(LOG_ERR, "connection_thread_main: cannot malloc read buffer");
2181 close_connection(sock);
2185 pthread_mutex_lock (&connection_threads_lock);
2186 connection_threads_num++;
2187 pthread_mutex_unlock (&connection_threads_lock);
2189 while (state == RUNNING)
2196 struct pollfd pollfd;
2200 pollfd.events = POLLIN | POLLPRI;
2203 status = poll (&pollfd, 1, /* timeout = */ 500);
2204 if (state != RUNNING)
2206 else if (status == 0) /* timeout */
2208 else if (status < 0) /* error */
2211 if (status != EINTR)
2212 RRDD_LOG (LOG_ERR, "connection_thread_main: poll(2) failed.");
2216 if ((pollfd.revents & POLLHUP) != 0) /* normal shutdown */
2218 else if ((pollfd.revents & (POLLIN | POLLPRI)) == 0)
2220 RRDD_LOG (LOG_WARNING, "connection_thread_main: "
2221 "poll(2) returned something unexpected: %#04hx",
2226 rbytes = read(fd, sock->rbuf + sock->next_read,
2227 RBUF_SIZE - sock->next_read);
2230 RRDD_LOG(LOG_ERR, "connection_thread_main: read() failed.");
2233 else if (rbytes == 0)
2236 sock->next_read += rbytes;
2238 if (sock->batch_start)
2239 now = sock->batch_start;
2243 while ((cmd = next_cmd(sock, &cmd_len)) != NULL)
2245 status = handle_request (sock, now, cmd, cmd_len+1);
2252 close_connection(sock);
2254 /* Remove this thread from the connection threads list */
2255 pthread_mutex_lock (&connection_threads_lock);
2256 connection_threads_num--;
2257 if (connection_threads_num <= 0)
2258 pthread_cond_broadcast(&connection_threads_done);
2259 pthread_mutex_unlock (&connection_threads_lock);
2262 } /* }}} void *connection_thread_main */
2264 static int open_listen_socket_unix (const listen_socket_t *sock) /* {{{ */
2267 struct sockaddr_un sa;
2268 listen_socket_t *temp;
2271 char *path_copy, *dir;
2274 if (strncmp(path, "unix:", strlen("unix:")) == 0)
2275 path += strlen("unix:");
2277 /* dirname may modify its argument */
2278 path_copy = strdup(path);
2279 if (path_copy == NULL)
2281 fprintf(stderr, "rrdcached: strdup(): %s\n",
2282 rrd_strerror(errno));
2286 dir = dirname(path_copy);
2287 if (rrd_mkdir_p(dir, 0777) != 0)
2289 fprintf(stderr, "Failed to create socket directory '%s': %s\n",
2290 dir, rrd_strerror(errno));
2296 temp = (listen_socket_t *) rrd_realloc (listen_fds,
2297 sizeof (listen_fds[0]) * (listen_fds_num + 1));
2300 fprintf (stderr, "rrdcached: open_listen_socket_unix: realloc failed.\n");
2304 memcpy (listen_fds + listen_fds_num, sock, sizeof (listen_fds[0]));
2306 fd = socket (PF_UNIX, SOCK_STREAM, /* protocol = */ 0);
2309 fprintf (stderr, "rrdcached: unix socket(2) failed: %s\n",
2310 rrd_strerror(errno));
2314 memset (&sa, 0, sizeof (sa));
2315 sa.sun_family = AF_UNIX;
2316 strncpy (sa.sun_path, path, sizeof (sa.sun_path) - 1);
2318 /* if we've gotten this far, we own the pid file. any daemon started
2319 * with the same args must not be alive. therefore, ensure that we can
2320 * create the socket...
2324 status = bind (fd, (struct sockaddr *) &sa, sizeof (sa));
2327 fprintf (stderr, "rrdcached: bind(%s) failed: %s.\n",
2328 path, rrd_strerror(errno));
2333 /* tweak the sockets group ownership */
2334 if (set_socket_group)
2336 if ( (chown(path, getuid(), socket_group) != 0) ||
2337 (chmod(path, (S_IRUSR|S_IWUSR|S_IXUSR | S_IRGRP|S_IWGRP)) != 0) )
2339 fprintf(stderr, "rrdcached: failed to set socket group permissions (%s)\n", strerror(errno));
2343 status = listen (fd, /* backlog = */ 10);
2346 fprintf (stderr, "rrdcached: listen(%s) failed: %s.\n",
2347 path, rrd_strerror(errno));
2353 listen_fds[listen_fds_num].fd = fd;
2354 listen_fds[listen_fds_num].family = PF_UNIX;
2355 strncpy(listen_fds[listen_fds_num].addr, path,
2356 sizeof (listen_fds[listen_fds_num].addr) - 1);
2360 } /* }}} int open_listen_socket_unix */
2362 static int open_listen_socket_network(const listen_socket_t *sock) /* {{{ */
2364 struct addrinfo ai_hints;
2365 struct addrinfo *ai_res;
2366 struct addrinfo *ai_ptr;
2367 char addr_copy[NI_MAXHOST];
2372 strncpy (addr_copy, sock->addr, sizeof(addr_copy)-1);
2373 addr_copy[sizeof (addr_copy) - 1] = 0;
2376 memset (&ai_hints, 0, sizeof (ai_hints));
2377 ai_hints.ai_flags = 0;
2378 #ifdef AI_ADDRCONFIG
2379 ai_hints.ai_flags |= AI_ADDRCONFIG;
2381 ai_hints.ai_family = AF_UNSPEC;
2382 ai_hints.ai_socktype = SOCK_STREAM;
2385 if (*addr == '[') /* IPv6+port format */
2387 /* `addr' is something like "[2001:780:104:2:211:24ff:feab:26f8]:12345" */
2390 port = strchr (addr, ']');
2393 fprintf (stderr, "rrdcached: Malformed address: %s\n", sock->addr);
2401 else if (*port == 0)
2405 fprintf (stderr, "rrdcached: Garbage after address: %s\n", port);
2408 } /* if (*addr == '[') */
2411 port = rindex(addr, ':');
2419 status = getaddrinfo (addr,
2420 port == NULL ? RRDCACHED_DEFAULT_PORT : port,
2421 &ai_hints, &ai_res);
2424 fprintf (stderr, "rrdcached: getaddrinfo(%s) failed: %s\n",
2425 addr, gai_strerror (status));
2429 for (ai_ptr = ai_res; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
2432 listen_socket_t *temp;
2435 temp = (listen_socket_t *) rrd_realloc (listen_fds,
2436 sizeof (listen_fds[0]) * (listen_fds_num + 1));
2440 "rrdcached: open_listen_socket_network: realloc failed.\n");
2444 memcpy (listen_fds + listen_fds_num, sock, sizeof (listen_fds[0]));
2446 fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
2449 fprintf (stderr, "rrdcached: network socket(2) failed: %s.\n",
2450 rrd_strerror(errno));
2454 setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one));
2456 status = bind (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
2459 fprintf (stderr, "rrdcached: bind(%s) failed: %s.\n",
2460 sock->addr, rrd_strerror(errno));
2465 status = listen (fd, /* backlog = */ 10);
2468 fprintf (stderr, "rrdcached: listen(%s) failed: %s\n.",
2469 sock->addr, rrd_strerror(errno));
2471 freeaddrinfo(ai_res);
2475 listen_fds[listen_fds_num].fd = fd;
2476 listen_fds[listen_fds_num].family = ai_ptr->ai_family;
2478 } /* for (ai_ptr) */
2480 freeaddrinfo(ai_res);
2482 } /* }}} static int open_listen_socket_network */
2484 static int open_listen_socket (const listen_socket_t *sock) /* {{{ */
2486 assert(sock != NULL);
2487 assert(sock->addr != NULL);
2489 if (strncmp ("unix:", sock->addr, strlen ("unix:")) == 0
2490 || sock->addr[0] == '/')
2491 return (open_listen_socket_unix(sock));
2493 return (open_listen_socket_network(sock));
2494 } /* }}} int open_listen_socket */
2496 static int close_listen_sockets (void) /* {{{ */
2500 for (i = 0; i < listen_fds_num; i++)
2502 close (listen_fds[i].fd);
2504 if (listen_fds[i].family == PF_UNIX)
2505 unlink(listen_fds[i].addr);
2513 } /* }}} int close_listen_sockets */
2515 static void *listen_thread_main (void *args __attribute__((unused))) /* {{{ */
2517 struct pollfd *pollfds;
2522 if (listen_fds_num < 1)
2524 RRDD_LOG(LOG_ERR, "listen_thread_main: no listen_fds !");
2528 pollfds_num = listen_fds_num;
2529 pollfds = (struct pollfd *) malloc (sizeof (*pollfds) * pollfds_num);
2530 if (pollfds == NULL)
2532 RRDD_LOG (LOG_ERR, "listen_thread_main: malloc failed.");
2535 memset (pollfds, 0, sizeof (*pollfds) * pollfds_num);
2537 RRDD_LOG(LOG_INFO, "listening for connections");
2539 while (state == RUNNING)
2541 for (i = 0; i < pollfds_num; i++)
2543 pollfds[i].fd = listen_fds[i].fd;
2544 pollfds[i].events = POLLIN | POLLPRI;
2545 pollfds[i].revents = 0;
2548 status = poll (pollfds, pollfds_num, /* timeout = */ 1000);
2549 if (state != RUNNING)
2551 else if (status == 0) /* timeout */
2553 else if (status < 0) /* error */
2556 if (status != EINTR)
2558 RRDD_LOG (LOG_ERR, "listen_thread_main: poll(2) failed.");
2563 for (i = 0; i < pollfds_num; i++)
2565 listen_socket_t *client_sock;
2566 struct sockaddr_storage client_sa;
2567 socklen_t client_sa_size;
2569 pthread_attr_t attr;
2571 if (pollfds[i].revents == 0)
2574 if ((pollfds[i].revents & (POLLIN | POLLPRI)) == 0)
2576 RRDD_LOG (LOG_ERR, "listen_thread_main: "
2577 "poll(2) returned something unexpected for listen FD #%i.",
2582 client_sock = (listen_socket_t *) malloc (sizeof (listen_socket_t));
2583 if (client_sock == NULL)
2585 RRDD_LOG (LOG_ERR, "listen_thread_main: malloc failed.");
2588 memcpy(client_sock, &listen_fds[i], sizeof(listen_fds[0]));
2590 client_sa_size = sizeof (client_sa);
2591 client_sock->fd = accept (pollfds[i].fd,
2592 (struct sockaddr *) &client_sa, &client_sa_size);
2593 if (client_sock->fd < 0)
2595 RRDD_LOG (LOG_ERR, "listen_thread_main: accept(2) failed.");
2600 pthread_attr_init (&attr);
2601 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
2603 status = pthread_create (&tid, &attr, connection_thread_main,
2607 RRDD_LOG (LOG_ERR, "listen_thread_main: pthread_create failed.");
2608 close_connection(client_sock);
2611 } /* for (pollfds_num) */
2612 } /* while (state == RUNNING) */
2614 RRDD_LOG(LOG_INFO, "starting shutdown");
2616 close_listen_sockets ();
2618 pthread_mutex_lock (&connection_threads_lock);
2619 while (connection_threads_num > 0)
2620 pthread_cond_wait(&connection_threads_done, &connection_threads_lock);
2621 pthread_mutex_unlock (&connection_threads_lock);
2626 } /* }}} void *listen_thread_main */
2628 static int daemonize (void) /* {{{ */
2633 daemon_uid = geteuid();
2635 pid_fd = open_pidfile("create", O_CREAT|O_EXCL|O_WRONLY);
2637 pid_fd = check_pidfile();
2641 /* open all the listen sockets */
2642 if (config_listen_address_list_len > 0)
2644 for (size_t i = 0; i < config_listen_address_list_len; i++)
2645 open_listen_socket (config_listen_address_list[i]);
2647 rrd_free_ptrs((void ***) &config_listen_address_list,
2648 &config_listen_address_list_len);
2652 listen_socket_t sock;
2653 memset(&sock, 0, sizeof(sock));
2654 strncpy(sock.addr, RRDCACHED_DEFAULT_ADDRESS, sizeof(sock.addr)-1);
2655 open_listen_socket (&sock);
2658 if (listen_fds_num < 1)
2660 fprintf (stderr, "rrdcached: FATAL: cannot open any listen sockets\n");
2664 if (!stay_foreground)
2671 fprintf (stderr, "daemonize: fork(2) failed.\n");
2677 /* Become session leader */
2680 /* Open the first three file descriptors to /dev/null */
2685 open ("/dev/null", O_RDWR);
2686 if (dup(0) == -1 || dup(0) == -1){
2687 RRDD_LOG (LOG_ERR, "faild to run dup.\n");
2689 } /* if (!stay_foreground) */
2691 /* Change into the /tmp directory. */
2692 base_dir = (config_base_dir != NULL)
2696 if (chdir (base_dir) != 0)
2698 fprintf (stderr, "daemonize: chdir (%s) failed.\n", base_dir);
2702 install_signal_handlers();
2704 openlog ("rrdcached", LOG_PID, LOG_DAEMON);
2705 RRDD_LOG(LOG_INFO, "starting up");
2707 cache_tree = g_tree_new_full ((GCompareDataFunc) strcmp, NULL, NULL,
2708 (GDestroyNotify) free_cache_item);
2709 if (cache_tree == NULL)
2711 RRDD_LOG (LOG_ERR, "daemonize: g_tree_new failed.");
2715 return write_pidfile (pid_fd);
2720 } /* }}} int daemonize */
2722 static int cleanup (void) /* {{{ */
2724 pthread_cond_broadcast (&flush_cond);
2725 pthread_join (flush_thread, NULL);
2727 pthread_cond_broadcast (&queue_cond);
2728 for (int i = 0; i < config_queue_threads; i++)
2729 pthread_join (queue_threads[i], NULL);
2731 if (config_flush_at_shutdown)
2733 assert(cache_queue_head == NULL);
2734 RRDD_LOG(LOG_INFO, "clean shutdown; all RRDs flushed");
2737 free(queue_threads);
2738 free(config_base_dir);
2740 pthread_mutex_lock(&cache_lock);
2741 g_tree_destroy(cache_tree);
2743 pthread_mutex_lock(&journal_lock);
2746 RRDD_LOG(LOG_INFO, "goodbye");
2750 free(config_pid_file);
2753 } /* }}} int cleanup */
2755 static int read_options (int argc, char **argv) /* {{{ */
2760 char **permissions = NULL;
2761 size_t permissions_len = 0;
2763 while ((option = getopt(argc, argv, "gl:s:P:f:w:z:t:Bb:p:Fj:h?")) != -1)
2773 listen_socket_t *new;
2775 new = malloc(sizeof(listen_socket_t));
2778 fprintf(stderr, "read_options: malloc failed.\n");
2781 memset(new, 0, sizeof(listen_socket_t));
2783 strncpy(new->addr, optarg, sizeof(new->addr)-1);
2785 /* Add permissions to the socket {{{ */
2786 if (permissions_len != 0)
2789 for (i = 0; i < permissions_len; i++)
2791 status = socket_permission_add (new, permissions[i]);
2794 fprintf (stderr, "read_options: Adding permission \"%s\" to "
2795 "socket failed. Most likely, this permission doesn't "
2796 "exist. Check your command line.\n", permissions[i]);
2801 else /* if (permissions_len == 0) */
2803 /* Add permission for ALL commands to the socket. */
2805 for (i = 0; i < list_of_commands_len; i++)
2807 status = socket_permission_add (new, list_of_commands[i].cmd);
2810 fprintf (stderr, "read_options: Adding permission \"%s\" to "
2811 "socket failed. This should never happen, ever! Sorry.\n",
2817 /* }}} Done adding permissions. */
2819 if (!rrd_add_ptr((void ***)&config_listen_address_list,
2820 &config_listen_address_list_len, new))
2822 fprintf(stderr, "read_options: rrd_add_ptr failed.\n");
2828 /* set socket group permissions */
2834 group_gid = strtoul(optarg, NULL, 10);
2835 if (errno != EINVAL && group_gid>0)
2837 /* we were passed a number */
2838 grp = getgrgid(group_gid);
2842 grp = getgrnam(optarg);
2847 socket_group = grp->gr_gid;
2848 set_socket_group = TRUE;
2852 /* no idea what the user wanted... */
2853 fprintf (stderr, "read_options: couldn't map \"%s\" to a group, Sorry\n", optarg);
2866 rrd_free_ptrs ((void *) &permissions, &permissions_len);
2868 optcopy = strdup (optarg);
2871 while ((ptr = strtok_r (dummy, ", ", &saveptr)) != NULL)
2874 rrd_add_strdup ((void *) &permissions, &permissions_len, ptr);
2885 temp = atoi (optarg);
2887 config_flush_interval = temp;
2890 fprintf (stderr, "Invalid flush interval: %s\n", optarg);
2900 temp = atoi (optarg);
2902 config_write_interval = temp;
2905 fprintf (stderr, "Invalid write interval: %s\n", optarg);
2915 temp = atoi(optarg);
2917 config_write_jitter = temp;
2920 fprintf (stderr, "Invalid write jitter: -z %s\n", optarg);
2930 threads = atoi(optarg);
2932 config_queue_threads = threads;
2935 fprintf (stderr, "Invalid thread count: -t %s\n", optarg);
2942 config_write_base_only = 1;
2948 char base_realpath[PATH_MAX];
2950 if (config_base_dir != NULL)
2951 free (config_base_dir);
2952 config_base_dir = strdup (optarg);
2953 if (config_base_dir == NULL)
2955 fprintf (stderr, "read_options: strdup failed.\n");
2959 if (rrd_mkdir_p (config_base_dir, 0777) != 0)
2961 fprintf (stderr, "Failed to create base directory '%s': %s\n",
2962 config_base_dir, rrd_strerror (errno));
2966 /* make sure that the base directory is not resolved via
2967 * symbolic links. this makes some performance-enhancing
2968 * assumptions possible (we don't have to resolve paths
2969 * that start with a "/")
2971 if (realpath(config_base_dir, base_realpath) == NULL)
2973 fprintf (stderr, "Failed to canonicalize the base directory '%s': "
2974 "%s\n", config_base_dir, rrd_strerror(errno));
2978 len = strlen (config_base_dir);
2979 while ((len > 0) && (config_base_dir[len - 1] == '/'))
2981 config_base_dir[len - 1] = 0;
2987 fprintf (stderr, "Invalid base directory: %s\n", optarg);
2991 _config_base_dir_len = len;
2993 len = strlen (base_realpath);
2994 while ((len > 0) && (base_realpath[len - 1] == '/'))
2996 base_realpath[len - 1] = '\0';
3000 if (strncmp(config_base_dir,
3001 base_realpath, sizeof(base_realpath)) != 0)
3004 "Base directory (-b) resolved via file system links!\n"
3005 "Please consult rrdcached '-b' documentation!\n"
3006 "Consider specifying the real directory (%s)\n",
3015 if (config_pid_file != NULL)
3016 free (config_pid_file);
3017 config_pid_file = strdup (optarg);
3018 if (config_pid_file == NULL)
3020 fprintf (stderr, "read_options: strdup failed.\n");
3027 config_flush_at_shutdown = 1;
3032 const char *dir = journal_dir = strdup(optarg);
3034 status = rrd_mkdir_p(dir, 0777);
3037 fprintf(stderr, "Failed to create journal directory '%s': %s\n",
3038 dir, rrd_strerror(errno));
3042 if (access(dir, R_OK|W_OK|X_OK) != 0)
3044 fprintf(stderr, "Must specify a writable directory with -j! (%s)\n",
3045 errno ? rrd_strerror(errno) : "");
3053 printf ("RRDCacheD %s\n"
3054 "Copyright (C) 2008,2009 Florian octo Forster and Kevin Brintnall\n"
3056 "Usage: rrdcached [options]\n"
3058 "Valid options are:\n"
3059 " -l <address> Socket address to listen to.\n"
3060 " -P <perms> Sets the permissions to assign to all following "
3062 " -w <seconds> Interval in which to write data.\n"
3063 " -z <delay> Delay writes up to <delay> seconds to spread load\n"
3064 " -t <threads> Number of write threads.\n"
3065 " -f <seconds> Interval in which to flush dead data.\n"
3066 " -p <file> Location of the PID-file.\n"
3067 " -b <dir> Base directory to change to.\n"
3068 " -B Restrict file access to paths within -b <dir>\n"
3069 " -g Do not fork and run in the foreground.\n"
3070 " -j <dir> Directory in which to create the journal files.\n"
3071 " -F Always flush all updates at shutdown\n"
3072 " -s <id|name> Make socket g+rw to named group\n"
3074 "For more information and a detailed description of all options "
3076 "to the rrdcached(1) manual page.\n",
3080 } /* switch (option) */
3081 } /* while (getopt) */
3083 /* advise the user when values are not sane */
3084 if (config_flush_interval < 2 * config_write_interval)
3085 fprintf(stderr, "WARNING: flush interval (-f) should be at least"
3086 " 2x write interval (-w) !\n");
3087 if (config_write_jitter > config_write_interval)
3088 fprintf(stderr, "WARNING: write delay (-z) should NOT be larger than"
3089 " write interval (-w) !\n");
3091 if (config_write_base_only && config_base_dir == NULL)
3092 fprintf(stderr, "WARNING: -B does not make sense without -b!\n"
3093 " Consult the rrdcached documentation\n");
3095 if (journal_dir == NULL)
3096 config_flush_at_shutdown = 1;
3098 rrd_free_ptrs ((void *) &permissions, &permissions_len);
3101 } /* }}} int read_options */
3103 int main (int argc, char **argv)
3107 status = read_options (argc, argv);
3115 status = daemonize ();
3118 fprintf (stderr, "rrdcached: daemonize failed, exiting.\n");
3124 /* start the queue threads */
3125 queue_threads = calloc(config_queue_threads, sizeof(*queue_threads));
3126 if (queue_threads == NULL)
3128 RRDD_LOG (LOG_ERR, "FATAL: cannot calloc queue threads");
3132 for (int i = 0; i < config_queue_threads; i++)
3134 memset (&queue_threads[i], 0, sizeof (*queue_threads));
3135 status = pthread_create (&queue_threads[i], NULL, queue_thread_main, NULL);
3138 RRDD_LOG (LOG_ERR, "FATAL: cannot create queue thread");
3144 /* start the flush thread */
3145 memset(&flush_thread, 0, sizeof(flush_thread));
3146 status = pthread_create (&flush_thread, NULL, flush_thread_main, NULL);
3149 RRDD_LOG (LOG_ERR, "FATAL: cannot create flush thread");
3154 listen_thread_main (NULL);
3161 * vim: set sw=2 sts=2 ts=8 et fdm=marker :