--- /dev/null
+/**
+ * RRDTool - src/rrd_daemon.c
+ * Copyright (C) 2008 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; 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
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ *
+ * Authors:
+ * Florian octo Forster <octo at verplant.org>
+ **/
+
+/*
+ * First tell the compiler to stick to the C99 and POSIX standards as close as
+ * possible.
+ */
+#ifndef __STRICT_ANSI__ /* {{{ */
+# define __STRICT_ANSI__
+#endif
+
+#ifndef _ISOC99_SOURCE
+# define _ISOC99_SOURCE
+#endif
+
+#ifdef _POSIX_C_SOURCE
+# undef _POSIX_C_SOURCE
+#endif
+#define _POSIX_C_SOURCE 200112L
+
+/* Single UNIX needed for strdup. */
+#ifdef _XOPEN_SOURCE
+# undef _XOPEN_SOURCE
+#endif
+#define _XOPEN_SOURCE 500
+
+#ifndef _REENTRANT
+# define _REENTRANT
+#endif
+
+#ifndef _THREAD_SAFE
+# define _THREAD_SAFE
+#endif
+
+#ifdef _GNU_SOURCE
+# undef _GNU_SOURCE
+#endif
+/* }}} */
+
+/*
+ * Now for some includes..
+ */
+#include "rrd.h" /* {{{ */
+#include "rrd_client.h"
+
+#include <stdlib.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <netdb.h>
+#include <poll.h>
+#include <syslog.h>
+#include <pthread.h>
+#include <errno.h>
+#include <assert.h>
+#include <sys/time.h>
+#include <time.h>
+
+#include <glib-2.0/glib.h>
+/* }}} */
+
+#define RRDD_LOG(severity, ...) syslog ((severity), __VA_ARGS__)
+
+#ifndef __GNUC__
+# define __attribute__(x) /**/
+#endif
+
+#if 0
+/* FIXME: I don't want to declare strdup myself! */
+extern char *strdup (const char *s);
+#endif
+
+/*
+ * Types
+ */
+struct listen_socket_s
+{
+ int fd;
+ char path[PATH_MAX + 1];
+};
+typedef struct listen_socket_s listen_socket_t;
+
+struct cache_item_s;
+typedef struct cache_item_s cache_item_t;
+struct cache_item_s
+{
+ char *file;
+ char **values;
+ int values_num;
+ time_t last_flush_time;
+#define CI_FLAGS_IN_TREE 0x01
+#define CI_FLAGS_IN_QUEUE 0x02
+ int flags;
+
+ cache_item_t *next;
+};
+
+/*
+ * Variables
+ */
+static listen_socket_t *listen_fds = NULL;
+static size_t listen_fds_num = 0;
+
+static int do_shutdown = 0;
+
+static pthread_t queue_thread;
+
+static pthread_t *connetion_threads = NULL;
+static pthread_mutex_t connetion_threads_lock = PTHREAD_MUTEX_INITIALIZER;
+static int connetion_threads_num = 0;
+
+/* Cache stuff */
+static GTree *cache_tree = NULL;
+static cache_item_t *cache_queue_head = NULL;
+static cache_item_t *cache_queue_tail = NULL;
+static pthread_mutex_t cache_lock = PTHREAD_MUTEX_INITIALIZER;
+static pthread_cond_t cache_cond = PTHREAD_COND_INITIALIZER;
+
+static int config_write_interval = 300;
+static int config_flush_interval = 3600;
+
+static char **config_listen_address_list = NULL;
+static int config_listen_address_list_len = 0;
+
+/*
+ * Functions
+ */
+static void sig_int_handler (int s __attribute__((unused))) /* {{{ */
+{
+ do_shutdown++;
+} /* }}} void sig_int_handler */
+
+static void sig_term_handler (int s __attribute__((unused))) /* {{{ */
+{
+ do_shutdown++;
+} /* }}} void sig_term_handler */
+
+/*
+ * enqueue_cache_item:
+ * `cache_lock' must be acquired before calling this function!
+ */
+static int enqueue_cache_item (cache_item_t *ci) /* {{{ */
+{
+ RRDD_LOG (LOG_DEBUG, "handle_request_update: Adding %s to the update queue.",
+ ci->file);
+
+ if (ci == NULL)
+ return (-1);
+
+ if ((ci->flags & CI_FLAGS_IN_QUEUE) != 0)
+ return (-1);
+
+ assert (ci->next == NULL);
+
+ if (cache_queue_tail == NULL)
+ cache_queue_head = ci;
+ else
+ cache_queue_tail->next = ci;
+ cache_queue_tail = ci;
+
+ return (0);
+} /* }}} int enqueue_cache_item */
+
+/*
+ * tree_callback_flush:
+ * Called via `g_tree_foreach' in `queue_thread_main'. `cache_lock' is held
+ * while this is in progress.
+ */
+static gboolean tree_callback_flush (gpointer key /* {{{ */
+ __attribute__((unused)), gpointer value, gpointer data)
+{
+ cache_item_t *ci;
+ time_t now;
+
+ key = NULL; /* make compiler happy */
+
+ ci = (cache_item_t *) value;
+ now = *((time_t *) data);
+
+ if (((now - ci->last_flush_time) >= config_write_interval)
+ && ((ci->flags & CI_FLAGS_IN_QUEUE) == 0))
+ enqueue_cache_item (ci);
+
+ return (TRUE);
+} /* }}} gboolean tree_callback_flush */
+
+static void *queue_thread_main (void *args __attribute__((unused))) /* {{{ */
+{
+ struct timeval now;
+ struct timespec next_flush;
+
+ gettimeofday (&now, NULL);
+ next_flush.tv_sec = now.tv_sec + config_flush_interval;
+ next_flush.tv_nsec = 1000 * now.tv_usec;
+
+ pthread_mutex_lock (&cache_lock);
+ while ((do_shutdown == 0) || (cache_queue_head != NULL))
+ {
+ cache_item_t *ci;
+ char *file;
+ char **values;
+ int values_num;
+ int status;
+ int i;
+
+ /* First, check if it's time to do the cache flush. */
+ gettimeofday (&now, NULL);
+ if ((now.tv_sec > next_flush.tv_sec)
+ || ((now.tv_sec == next_flush.tv_sec)
+ && ((1000 * now.tv_usec) > next_flush.tv_nsec)))
+ {
+ time_t time_now;
+
+ /* Pass the current time as user data so that we don't need to call
+ * `time' for each node. */
+ time_now = time (NULL);
+
+ g_tree_foreach (cache_tree, tree_callback_flush, (gpointer) &time_now);
+
+ /* Determine the time of the next cache flush. */
+ while (next_flush.tv_sec < now.tv_sec)
+ next_flush.tv_sec += config_flush_interval;
+ }
+
+ /* Now, check if there's something to store away. If not, wait until
+ * something comes in or it's time to do the cache flush. */
+ if (cache_queue_head == NULL)
+ {
+ struct timespec timeout;
+
+ timeout.tv_sec = next_flush.tv_sec - now.tv_sec;
+ if (next_flush.tv_nsec < (1000 * now.tv_usec))
+ {
+ timeout.tv_sec--;
+ timeout.tv_nsec = 1000000000 + next_flush.tv_nsec
+ - (1000 * now.tv_usec);
+ }
+ else
+ {
+ timeout.tv_nsec = next_flush.tv_nsec - (1000 * now.tv_usec);
+ }
+
+ pthread_cond_timedwait (&cache_cond, &cache_lock, &timeout);
+ }
+
+ /* Check if a value has arrived. This may be NULL if we timed out or there
+ * was an interrupt such as a signal. */
+ if (cache_queue_head == NULL)
+ continue;
+
+ ci = cache_queue_head;
+
+ /* copy the relevant parts */
+ file = strdup (ci->file);
+ if (file == NULL)
+ {
+ RRDD_LOG (LOG_ERR, "queue_thread_main: strdup failed.");
+ continue;
+ }
+
+ values = ci->values;
+ values_num = ci->values_num;
+
+ ci->values = NULL;
+ ci->values_num = 0;
+
+ ci->last_flush_time = time (NULL);
+ ci->flags &= ~(CI_FLAGS_IN_QUEUE);
+
+ cache_queue_head = ci->next;
+ if (cache_queue_head == NULL)
+ cache_queue_tail = NULL;
+ ci->next = NULL;
+
+ pthread_mutex_unlock (&cache_lock);
+
+ RRDD_LOG (LOG_DEBUG, "queue_thread_main: rrd_update (%s, %i, %p)",
+ file, values_num, (void *) values);
+
+ status = rrd_update_r (file, NULL, values_num, (void *) values);
+ if (status != 0)
+ {
+ RRDD_LOG (LOG_ERR, "queue_thread_main: "
+ "rrd_update_r failed with status %i.",
+ status);
+ }
+
+ free (file);
+ for (i = 0; i < values_num; i++)
+ free (values[i]);
+
+ pthread_mutex_lock (&cache_lock);
+ } /* while (do_shutdown == 0) */
+ pthread_mutex_unlock (&cache_lock);
+
+ RRDD_LOG (LOG_DEBUG, "queue_thread_main: Exiting.");
+
+ return (NULL);
+} /* }}} void *queue_thread_main */
+
+static int handle_request_update (int fd, /* {{{ */
+ char *buffer, int buffer_size)
+{
+ char *file;
+ char *value;
+ char *buffer_ptr;
+ int values_num = 0;
+ int status;
+
+ time_t now;
+
+ cache_item_t *ci;
+ char answer[4096];
+
+ now = time (NULL);
+
+ RRDD_LOG (LOG_DEBUG, "handle_request_update (%i, %p, %i)",
+ fd, (void *) buffer, buffer_size);
+
+ buffer_ptr = buffer;
+
+ file = buffer_ptr;
+ buffer_ptr += strlen (file) + 1;
+
+ pthread_mutex_lock (&cache_lock);
+
+ ci = g_tree_lookup (cache_tree, file);
+ if (ci == NULL)
+ {
+ ci = (cache_item_t *) malloc (sizeof (cache_item_t));
+ if (ci == NULL)
+ {
+ pthread_mutex_unlock (&cache_lock);
+ RRDD_LOG (LOG_ERR, "handle_request_update: malloc failed.");
+ return (-1);
+ }
+ memset (ci, 0, sizeof (cache_item_t));
+
+ ci->file = strdup (file);
+ if (ci->file == NULL)
+ {
+ pthread_mutex_unlock (&cache_lock);
+ RRDD_LOG (LOG_ERR, "handle_request_update: malloc failed.");
+ free (ci);
+ return (-1);
+ }
+
+ ci->values = NULL;
+ ci->values_num = 0;
+ ci->last_flush_time = now;
+ ci->flags = CI_FLAGS_IN_TREE;
+
+ g_tree_insert (cache_tree, (void *) ci->file, (void *) ci);
+
+ RRDD_LOG (LOG_DEBUG, "handle_request_update: Created new tree node %s.",
+ ci->file);
+ }
+ assert (ci != NULL);
+
+ while (*buffer_ptr != 0)
+ {
+ char **temp;
+
+ value = buffer_ptr;
+ buffer_ptr += strlen (value) + 1;
+
+ temp = (char **) realloc (ci->values,
+ sizeof (char *) * (ci->values_num + 1));
+ if (temp == NULL)
+ {
+ RRDD_LOG (LOG_ERR, "handle_request_update: realloc failed.");
+ continue;
+ }
+ ci->values = temp;
+
+ ci->values[ci->values_num] = strdup (value);
+ if (ci->values[ci->values_num] == NULL)
+ {
+ RRDD_LOG (LOG_ERR, "handle_request_update: strdup failed.");
+ continue;
+ }
+ ci->values_num++;
+
+ values_num++;
+ }
+
+ if (((now - ci->last_flush_time) >= config_write_interval)
+ && ((ci->flags & CI_FLAGS_IN_QUEUE) == 0))
+ {
+ enqueue_cache_item (ci);
+ pthread_cond_signal (&cache_cond);
+ }
+
+ pthread_mutex_unlock (&cache_lock);
+
+ snprintf (answer, sizeof (answer), "0 Enqueued %i value(s)\n", values_num);
+ answer[sizeof (answer) - 1] = 0;
+
+ status = write (fd, answer, sizeof (answer));
+ if (status < 0)
+ {
+ status = errno;
+ RRDD_LOG (LOG_INFO, "handle_request_update: write(2) returned an error.");
+ return (status);
+ }
+
+ return (0);
+} /* }}} int handle_request_update */
+
+static int handle_request (int fd) /* {{{ */
+{
+ char buffer[4096];
+ int buffer_size;
+
+ RRDD_LOG (LOG_DEBUG, "handle_request (%i)", fd);
+
+ buffer_size = read (fd, buffer, sizeof (buffer));
+ if (buffer_size < 1)
+ {
+ RRDD_LOG (LOG_ERR, "handle_request: read(2) failed.");
+ return (-1);
+ }
+ assert (((size_t) buffer_size) <= sizeof (buffer));
+
+ if ((buffer[buffer_size - 2] != 0)
+ || (buffer[buffer_size - 1] != 0))
+ {
+ RRDD_LOG (LOG_INFO, "handle_request: malformed request.");
+ return (-1);
+ }
+
+ /* fields in the buffer a separated by null bytes. */
+ if (strcmp (buffer, "update") == 0)
+ {
+ int offset = strlen ("update") + 1;
+ return (handle_request_update (fd, buffer + offset,
+ buffer_size - offset));
+ }
+ else
+ {
+ RRDD_LOG (LOG_INFO, "handle_request: unknown command: %s.", buffer);
+ return (-1);
+ }
+} /* }}} int handle_request */
+
+static void *connection_thread_main (void *args /* {{{ */
+ __attribute__((unused)))
+{
+ pthread_t self;
+ int i;
+ int fd;
+
+ fd = *((int *) args);
+
+ RRDD_LOG (LOG_DEBUG, "connection_thread_main: Adding myself to "
+ "connetion_threads[]..");
+ pthread_mutex_lock (&connetion_threads_lock);
+ {
+ pthread_t *temp;
+
+ temp = (pthread_t *) realloc (connetion_threads,
+ sizeof (pthread_t) * (connetion_threads_num + 1));
+ if (temp == NULL)
+ {
+ RRDD_LOG (LOG_ERR, "connection_thread_main: realloc failed.");
+ }
+ else
+ {
+ connetion_threads = temp;
+ connetion_threads[connetion_threads_num] = pthread_self ();
+ connetion_threads_num++;
+ }
+ }
+ pthread_mutex_unlock (&connetion_threads_lock);
+ RRDD_LOG (LOG_DEBUG, "connection_thread_main: done");
+
+ while (do_shutdown == 0)
+ {
+ struct pollfd pollfd;
+ int status;
+
+ pollfd.fd = fd;
+ pollfd.events = POLLIN | POLLPRI;
+ pollfd.revents = 0;
+
+ status = poll (&pollfd, 1, /* timeout = */ 500);
+ if (status == 0) /* timeout */
+ continue;
+ else if (status < 0) /* error */
+ {
+ status = errno;
+ if (status == EINTR)
+ continue;
+ RRDD_LOG (LOG_ERR, "connection_thread_main: poll(2) failed.");
+ continue;
+ }
+
+ if ((pollfd.revents & POLLHUP) != 0) /* normal shutdown */
+ {
+ RRDD_LOG (LOG_DEBUG, "connection_thread_main: "
+ "poll(2) returned POLLHUP.");
+ close (fd);
+ break;
+ }
+ else if ((pollfd.revents & (POLLIN | POLLPRI)) == 0)
+ {
+ RRDD_LOG (LOG_WARNING, "connection_thread_main: "
+ "poll(2) returned something unexpected: %#04hx",
+ pollfd.revents);
+ close (fd);
+ break;
+ }
+
+ status = handle_request (fd);
+ if (status != 0)
+ {
+ close (fd);
+ break;
+ }
+ }
+
+ self = pthread_self ();
+ /* Remove this thread from the connection threads list */
+ pthread_mutex_lock (&connetion_threads_lock);
+ /* Find out own index in the array */
+ for (i = 0; i < connetion_threads_num; i++)
+ if (pthread_equal (connetion_threads[i], self) != 0)
+ break;
+ assert (i < connetion_threads_num);
+
+ /* Move the trailing threads forward. */
+ if (i < (connetion_threads_num - 1))
+ {
+ memmove (connetion_threads + i,
+ connetion_threads + i + 1,
+ sizeof (pthread_t) * (connetion_threads_num - i - 1));
+ }
+
+ connetion_threads_num--;
+ pthread_mutex_unlock (&connetion_threads_lock);
+
+ free (args);
+ return (NULL);
+} /* }}} void *connection_thread_main */
+
+static int open_listen_socket_unix (const char *path) /* {{{ */
+{
+ int fd;
+ struct sockaddr_un sa;
+ listen_socket_t *temp;
+ int status;
+
+ temp = (listen_socket_t *) realloc (listen_fds,
+ sizeof (listen_fds[0]) * (listen_fds_num + 1));
+ if (temp == NULL)
+ {
+ RRDD_LOG (LOG_ERR, "open_listen_socket_unix: realloc failed.");
+ return (-1);
+ }
+ listen_fds = temp;
+ memset (listen_fds + listen_fds_num, 0, sizeof (listen_fds[0]));
+
+ fd = socket (PF_UNIX, SOCK_STREAM, /* protocol = */ 0);
+ if (fd < 0)
+ {
+ RRDD_LOG (LOG_ERR, "open_listen_socket_unix: socket(2) failed.");
+ return (-1);
+ }
+
+ memset (&sa, 0, sizeof (sa));
+ sa.sun_family = AF_UNIX;
+ strncpy (sa.sun_path, path, sizeof (sa.sun_path) - 1);
+
+ status = bind (fd, (struct sockaddr *) &sa, sizeof (sa));
+ if (status != 0)
+ {
+ RRDD_LOG (LOG_ERR, "open_listen_socket_unix: bind(2) failed.");
+ close (fd);
+ unlink (path);
+ return (-1);
+ }
+
+ status = listen (fd, /* backlog = */ 10);
+ if (status != 0)
+ {
+ RRDD_LOG (LOG_ERR, "open_listen_socket_unix: listen(2) failed.");
+ close (fd);
+ unlink (path);
+ return (-1);
+ }
+
+ listen_fds[listen_fds_num].fd = fd;
+ snprintf (listen_fds[listen_fds_num].path,
+ sizeof (listen_fds[listen_fds_num].path) - 1,
+ "unix:%s", path);
+ listen_fds_num++;
+
+ return (0);
+} /* }}} int open_listen_socket_unix */
+
+static int open_listen_socket (const char *addr) /* {{{ */
+{
+ struct addrinfo ai_hints;
+ struct addrinfo *ai_res;
+ struct addrinfo *ai_ptr;
+ int status;
+
+ assert (addr != NULL);
+
+ if (strncmp ("unix:", addr, strlen ("unix:")) == 0)
+ return (open_listen_socket_unix (addr + strlen ("unix:")));
+ else if (addr[0] == '/')
+ return (open_listen_socket_unix (addr));
+
+ memset (&ai_hints, 0, sizeof (ai_hints));
+ ai_hints.ai_flags = 0;
+#ifdef AI_ADDRCONFIG
+ ai_hints.ai_flags |= AI_ADDRCONFIG;
+#endif
+ ai_hints.ai_family = AF_UNSPEC;
+ ai_hints.ai_socktype = SOCK_STREAM;
+
+ ai_res = NULL;
+ status = getaddrinfo (addr, DEFAULT_PORT, &ai_hints, &ai_res);
+ if (status != 0)
+ {
+ RRDD_LOG (LOG_ERR, "open_listen_socket: getaddrinfo(%s) failed: "
+ "%s", addr, gai_strerror (status));
+ return (-1);
+ }
+
+ for (ai_ptr = ai_res; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
+ {
+ int fd;
+ listen_socket_t *temp;
+
+ temp = (listen_socket_t *) realloc (listen_fds,
+ sizeof (listen_fds[0]) * (listen_fds_num + 1));
+ if (temp == NULL)
+ {
+ RRDD_LOG (LOG_ERR, "open_listen_socket: realloc failed.");
+ continue;
+ }
+ listen_fds = temp;
+ memset (listen_fds + listen_fds_num, 0, sizeof (listen_fds[0]));
+
+ fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol);
+ if (fd < 0)
+ {
+ RRDD_LOG (LOG_ERR, "open_listen_socket: socket(2) failed.");
+ continue;
+ }
+
+ status = bind (fd, ai_ptr->ai_addr, ai_ptr->ai_addrlen);
+ if (status != 0)
+ {
+ RRDD_LOG (LOG_ERR, "open_listen_socket: bind(2) failed.");
+ close (fd);
+ continue;
+ }
+
+ status = listen (fd, /* backlog = */ 10);
+ if (status != 0)
+ {
+ RRDD_LOG (LOG_ERR, "open_listen_socket: listen(2) failed.");
+ close (fd);
+ return (-1);
+ }
+
+ listen_fds[listen_fds_num].fd = fd;
+ strncpy (listen_fds[listen_fds_num].path, addr,
+ sizeof (listen_fds[listen_fds_num].path) - 1);
+ listen_fds_num++;
+ } /* for (ai_ptr) */
+
+ return (0);
+} /* }}} int open_listen_socket */
+
+static int close_listen_sockets (void) /* {{{ */
+{
+ size_t i;
+
+ for (i = 0; i < listen_fds_num; i++)
+ {
+ close (listen_fds[i].fd);
+ if (strncmp ("unix:", listen_fds[i].path, strlen ("unix:")) == 0)
+ unlink (listen_fds[i].path + strlen ("unix:"));
+ }
+
+ free (listen_fds);
+ listen_fds = NULL;
+ listen_fds_num = 0;
+
+ return (0);
+} /* }}} int close_listen_sockets */
+
+static void *listen_thread_main (void *args __attribute__((unused))) /* {{{ */
+{
+ struct pollfd *pollfds;
+ int pollfds_num;
+ int status;
+ int i;
+
+ for (i = 0; i < config_listen_address_list_len; i++)
+ {
+ RRDD_LOG (LOG_DEBUG, "listen_thread_main: config_listen_address_list[%i] "
+ "= %s", i, config_listen_address_list[i]);
+ open_listen_socket (config_listen_address_list[i]);
+ }
+
+ if (config_listen_address_list_len < 1)
+ open_listen_socket (RRDD_SOCK_PATH);
+
+ if (listen_fds_num < 1)
+ {
+ RRDD_LOG (LOG_ERR, "listen_thread_main: No listen sockets "
+ "could be opened. Sorry.");
+ return (NULL);
+ }
+
+ pollfds_num = listen_fds_num;
+ pollfds = (struct pollfd *) malloc (sizeof (*pollfds) * pollfds_num);
+ if (pollfds == NULL)
+ {
+ RRDD_LOG (LOG_ERR, "listen_thread_main: malloc failed.");
+ return (NULL);
+ }
+ memset (pollfds, 0, sizeof (*pollfds) * pollfds_num);
+
+ while (do_shutdown == 0)
+ {
+ assert (pollfds_num == ((int) listen_fds_num));
+ for (i = 0; i < pollfds_num; i++)
+ {
+ pollfds[i].fd = listen_fds[i].fd;
+ pollfds[i].events = POLLIN | POLLPRI;
+ pollfds[i].revents = 0;
+ }
+
+ status = poll (pollfds, pollfds_num, /* timeout = */ -1);
+ if (status < 1)
+ {
+ status = errno;
+ if (status != EINTR)
+ {
+ RRDD_LOG (LOG_ERR, "listen_thread_main: poll(2) failed.");
+ }
+ continue;
+ }
+
+ for (i = 0; i < pollfds_num; i++)
+ {
+ int *client_sd;
+ struct sockaddr_storage client_sa;
+ socklen_t client_sa_size;
+ pthread_t tid;
+
+ if (pollfds[i].revents == 0)
+ continue;
+
+ if ((pollfds[i].revents & (POLLIN | POLLPRI)) == 0)
+ {
+ RRDD_LOG (LOG_ERR, "listen_thread_main: "
+ "poll(2) returned something unexpected for listen FD #%i.",
+ pollfds[i].fd);
+ continue;
+ }
+
+ client_sd = (int *) malloc (sizeof (int));
+ if (client_sd == NULL)
+ {
+ RRDD_LOG (LOG_ERR, "listen_thread_main: malloc failed.");
+ continue;
+ }
+
+ client_sa_size = sizeof (client_sa);
+ *client_sd = accept (pollfds[i].fd,
+ (struct sockaddr *) &client_sa, &client_sa_size);
+ if (*client_sd < 0)
+ {
+ RRDD_LOG (LOG_ERR, "listen_thread_main: accept(2) failed.");
+ continue;
+ }
+
+ RRDD_LOG (LOG_DEBUG, "listen_thread_main: accept(2) returned fd #%i.",
+ *client_sd);
+
+ status = pthread_create (&tid, /* attr = */ NULL, connection_thread_main,
+ /* args = */ (void *) client_sd);
+ if (status != 0)
+ {
+ RRDD_LOG (LOG_ERR, "listen_thread_main: pthread_create failed.");
+ close (*client_sd);
+ free (client_sd);
+ continue;
+ }
+
+ RRDD_LOG (LOG_DEBUG, "listen_thread_main: pthread_create succeeded: "
+ "tid = %lu",
+ *((unsigned long *) &tid));
+ } /* for (pollfds_num) */
+ } /* while (do_shutdown == 0) */
+
+ close_listen_sockets ();
+
+ pthread_mutex_lock (&connetion_threads_lock);
+ while (connetion_threads_num > 0)
+ {
+ pthread_t wait_for;
+
+ wait_for = connetion_threads[0];
+
+ pthread_mutex_unlock (&connetion_threads_lock);
+ pthread_join (wait_for, /* retval = */ NULL);
+ pthread_mutex_lock (&connetion_threads_lock);
+ }
+ pthread_mutex_unlock (&connetion_threads_lock);
+
+ RRDD_LOG (LOG_DEBUG, "listen_thread_main: Exiting.");
+
+ return (NULL);
+} /* }}} void *listen_thread_main */
+
+static int daemonize (void) /* {{{ */
+{
+ pid_t child;
+ int status;
+
+ child = fork ();
+ if (child < 0)
+ {
+ fprintf (stderr, "daemonize: fork(2) failed.\n");
+ return (-1);
+ }
+ else if (child > 0)
+ {
+ return (1);
+ }
+
+ /* Change into the /tmp directory. */
+ chdir ("/tmp");
+
+ /* Become session leader */
+ setsid ();
+
+ /* Open the first three file descriptors to /dev/null */
+ close (2);
+ close (1);
+ close (0);
+
+ open ("/dev/null", O_RDWR);
+ dup (0);
+ dup (0);
+
+ {
+ struct sigaction sa;
+
+ memset (&sa, 0, sizeof (sa));
+ sa.sa_handler = sig_int_handler;
+ sigaction (SIGINT, &sa, NULL);
+
+ memset (&sa, 0, sizeof (sa));
+ sa.sa_handler = sig_term_handler;
+ sigaction (SIGINT, &sa, NULL);
+
+ memset (&sa, 0, sizeof (sa));
+ sa.sa_handler = SIG_IGN;
+ sigaction (SIGPIPE, &sa, NULL);
+ }
+
+ openlog ("rrdd", LOG_PID, LOG_DAEMON);
+
+ cache_tree = g_tree_new ((GCompareFunc) strcmp);
+ if (cache_tree == NULL)
+ {
+ RRDD_LOG (LOG_ERR, "daemonize: g_tree_new failed.");
+ return (-1);
+ }
+
+ memset (&queue_thread, 0, sizeof (queue_thread));
+ status = pthread_create (&queue_thread, /* attr = */ NULL,
+ queue_thread_main, /* args = */ NULL);
+ if (status != 0)
+ {
+ RRDD_LOG (LOG_ERR, "daemonize: pthread_create failed.");
+ return (-1);
+ }
+
+ return (0);
+} /* }}} int daemonize */
+
+static int cleanup (void) /* {{{ */
+{
+ RRDD_LOG (LOG_DEBUG, "cleanup ()");
+
+ do_shutdown++;
+
+ RRDD_LOG (LOG_DEBUG, "cleanup: Joining queue_thread..");
+ pthread_cond_signal (&cache_cond);
+ pthread_join (queue_thread, /* return = */ NULL);
+ RRDD_LOG (LOG_DEBUG, "cleanup: done");
+
+ closelog ();
+
+ return (0);
+} /* }}} int cleanup */
+
+static int read_options (int argc, char **argv) /* {{{ */
+{
+ int option;
+ int status = 0;
+
+ while ((option = getopt(argc, argv, "l:f:w:h?")) != -1)
+ {
+ switch (option)
+ {
+ case 'l':
+ {
+ char **temp;
+
+ temp = (char **) realloc (config_listen_address_list,
+ sizeof (char *) * (config_listen_address_list_len + 1));
+ if (temp == NULL)
+ {
+ fprintf (stderr, "read_options: realloc failed.\n");
+ return (2);
+ }
+ config_listen_address_list = temp;
+
+ temp[config_listen_address_list_len] = strdup (optarg);
+ if (temp[config_listen_address_list_len] == NULL)
+ {
+ fprintf (stderr, "read_options: strdup failed.\n");
+ return (2);
+ }
+ config_listen_address_list_len++;
+ }
+ break;
+
+ case 'f':
+ {
+ int temp;
+
+ temp = atoi (optarg);
+ if (temp > 0)
+ config_flush_interval = temp;
+ else
+ {
+ fprintf (stderr, "Invalid flush interval: %s\n", optarg);
+ status = 3;
+ }
+ }
+ break;
+
+ case 'w':
+ {
+ int temp;
+
+ temp = atoi (optarg);
+ if (temp > 0)
+ config_write_interval = temp;
+ else
+ {
+ fprintf (stderr, "Invalid write interval: %s\n", optarg);
+ status = 2;
+ }
+ }
+ break;
+
+ case 'h':
+ case '?':
+ printf ("RRDd %s Copyright (C) 2008 Florian octo Forster\n"
+ "\n"
+ "Usage: rrdd [options]\n"
+ "\n"
+ "Valid options are:\n"
+ " -l <address> Socket address to listen to.\n"
+ " -w <seconds> Interval in which to write data.\n"
+ " -f <seconds> Interval in which to flush dead data.\n"
+ "\n"
+ "For more information and a detailed description of all options "
+ "please refer\n"
+ "to the rrdd(1) manual page.\n",
+ VERSION);
+ status = -1;
+ break;
+ } /* switch (option) */
+ } /* while (getopt) */
+
+ return (status);
+} /* }}} int read_options */
+
+int main (int argc, char **argv)
+{
+ int status;
+
+ status = read_options (argc, argv);
+ if (status != 0)
+ {
+ if (status < 0)
+ status = 0;
+ return (status);
+ }
+
+ status = daemonize ();
+ if (status == 1)
+ {
+ struct sigaction sigchld;
+
+ memset (&sigchld, 0, sizeof (sigchld));
+ sigchld.sa_handler = SIG_IGN;
+ sigaction (SIGCHLD, &sigchld, NULL);
+
+ return (0);
+ }
+ else if (status != 0)
+ {
+ fprintf (stderr, "daemonize failed, exiting.\n");
+ return (1);
+ }
+
+ listen_thread_main (NULL);
+
+ cleanup ();
+
+ return (0);
+} /* int main */
+
+/*
+ * vim: set sw=2 sts=2 ts=8 et fdm=marker :
+ */
projects / rrdtool.git / commitdiff