razzor/sammler
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use SIGUSR1 to reread config

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This commit is contained in:
Olaf Rempel 2009-05-02 15:32:33 +02:00
parent 49f3f7b571
commit aea79fe6cd
9 changed files with 224 additions and 17 deletions
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2
Makefile
View File

@ -18,7 +18,7 @@ WWW_OWNER = www-data
# ############################
SRC := configfile.c event.c helper.c logging.c network.c pidfile.c plugins.c probe.c
SRC += sammler.c sockaddr.c
SRC += sammler.c signals.c sockaddr.c
CFLAGS := -O2 -Wall -MMD -fno-stack-protector -I.
LDFLAGS := -ldl -rdynamic

15
event.c
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@ -30,6 +30,7 @@
static LIST_HEAD(event_fd_list);
static LIST_HEAD(event_timeout_list);
static int leave_loop;
struct event_fd {
struct list_head list;
@ -198,6 +199,11 @@ void event_remove_timeout(struct event_timeout *entry)
entry->flags |= EVENT_DELETE;
}
void event_loop_break(void *dummy)
{
leave_loop = 1;
}
int event_loop(void)
{
fd_set *fdsets = malloc(sizeof(fd_set) * 2);
@ -206,7 +212,8 @@ int event_loop(void)
return -1;
}
while (1) {
leave_loop = 0;
while (!leave_loop) {
struct timeval timeout, *timeout_p = NULL;
if (!list_empty(&event_timeout_list)) {
struct timeval now;
@ -247,6 +254,7 @@ int event_loop(void)
fd_set *readfds = NULL, *writefds = NULL;
struct event_fd *entry, *tmp;
int maxfd = -1;
list_for_each_entry_safe(entry, tmp, &event_fd_list, list) {
entry->flags &= ~EVENT_NEW;
@ -272,9 +280,11 @@ int event_loop(void)
}
FD_SET(entry->fd, writefds);
}
maxfd = (entry->fd > maxfd) ? entry->fd : maxfd;
}
int i = select(FD_SETSIZE, readfds, writefds, NULL, timeout_p);
int i = select(maxfd +1, readfds, writefds, NULL, timeout_p);
if (i <= 0) {
/* On error, -1 is returned, and errno is set
* appropriately; the sets and timeout become
@ -295,4 +305,5 @@ int event_loop(void)
}
}
free(fdsets);
return 0;
}

1
event.h
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@ -37,6 +37,7 @@ struct event_timeout * event_add_timeout(
void event_remove_timeout(struct event_timeout *entry);
void event_loop_break(void *dummy);
int event_loop(void);
#endif /* _EVENT_H_ */

9
logging.c
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@ -77,11 +77,15 @@ int log_print(int prio, const char *fmt, ...)
void log_close(void)
{
if (buffer)
if (buffer) {
free(buffer);
buffer = NULL;
}
if (log_fd)
if (log_fd) {
fclose(log_fd);
log_fd = NULL;
}
}
int log_init(const char *logfile)
@ -100,6 +104,7 @@ int log_init(const char *logfile)
return -1;
}
log_prio = LOG_EVERYTIME;
return 0;
}

1
network.c
View File

@ -200,6 +200,7 @@ void net_close(void) {
free(entry);
}
fwd_buf_len = 0;
if (fwd_buf != NULL)
free(fwd_buf);
}

2
probe.c
View File

@ -19,6 +19,8 @@ static const char *hostname;
int probe_init(void)
{
const char *fwd_only = config_get_string("global", "forward_only", "false");
submit_flags = 0;
if (!strncmp(fwd_only, "true", 4))
submit_flags |= SUBMIT_NET_ONLY;

46
sammler.c
View File

@ -35,6 +35,7 @@
#include "pidfile.h"
#include "plugins.h"
#include "probe.h"
#include "signals.h"
#define DEFAULT_CONFIG "sammler.conf"
#define DEFAULT_LOGFILE "sammler.log"
@ -84,7 +85,7 @@ int main(int argc, char *argv[])
} while (code != -1);
/* parse config file */
if (config_parse(config))
if (config_parse(config) < 0)
exit(1);
/* check logfile */
@ -98,7 +99,6 @@ int main(int argc, char *argv[])
}
/* start logging */
const char *logfile = config_get_string("global", "logfile", DEFAULT_LOGFILE);
if (log_init(logfile) < 0)
exit(1);
@ -112,22 +112,44 @@ int main(int argc, char *argv[])
}
}
log_print(LOG_EVERYTIME, "sammler (pid:%d)", getpid());
signal_init();
signal_set_callback(SIGUSR1, event_loop_break, NULL);
if (probe_init())
exit(1);
log_print(LOG_EVERYTIME, "sammler started (pid:%d)", getpid());
if (net_init())
exit(1);
while (1) {
if (probe_init())
break;
if (sammler_rrd_init())
exit(1);
if (net_init())
break;
if (sammler_rrd_init())
break;
if (plugin_init())
break;
/* exited on restart / SIGUSR1 */
event_loop();
plugin_close();
if (plugin_init()) {
net_close();
exit(1);
log_close();
config_free();
if (config_parse(config) < 0)
break;
logfile = config_get_string("global", "logfile", DEFAULT_LOGFILE);
if (log_init(logfile) < 0)
break;
log_print(LOG_EVERYTIME, "sammler restarted (pid:%d) ", getpid());
}
event_loop();
return 0;
}

153
signals.c Normal file
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@ -0,0 +1,153 @@
/***************************************************************************
* Copyright (C) 05/2009 by Olaf Rempel *
* razzor@kopf-tisch.de *
* *
* 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; version 2 of the License *
* *
* 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., *
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>
#include "event.h"
#include "list.h"
#include "logging.h"
#include "signals.h"
struct signal_entry {
struct list_head list;
int signum;
int deleted;
void (*callback)(void *privdata);
void *privdata;
};
static LIST_HEAD(callback_list);
static int sig_pipe[2];
static void sig_handler(int signal)
{
unsigned char signum = (signal & 0xFF);
write(sig_pipe[1], &signum, 1);
}
int signal_remove_callback(int signum, int type)
{
/* mark all old handler for deletion */
struct signal_entry *search;
list_for_each_entry(search, &callback_list, list) {
if (search->signum == signum)
search->deleted = 1;
}
struct sigaction sig_action;
switch (type) {
case SIG_IGNORE:
sig_action.sa_handler = SIG_IGN;
break;
default:
case SIG_DEFAULT:
sig_action.sa_handler = SIG_DFL;
break;
}
if (sigaction(signum, &sig_action, NULL) < 0) {
log_print(LOG_WARN, "signal_remove_callback(): sigaction()");
return -1;
}
/* trigger remove */
sig_handler(0);
return 0;
}
int signal_set_callback(int signum, void (*callback)(void *privdata), void *privdata)
{
signal_remove_callback(signum, SIG_DEFAULT);
struct signal_entry *entry = malloc(sizeof(struct signal_entry));
if (entry == NULL) {
log_print(LOG_WARN, "signal_add_callback(): out of memory");
return -1;
}
entry->signum = signum;
entry->deleted = 0;
entry->callback = callback;
entry->privdata = privdata;
list_add_tail(&entry->list, &callback_list);
struct sigaction sig_action = {
.sa_handler = sig_handler,
};
if (sigaction(signum, &sig_action, NULL) < 0) {
log_print(LOG_WARN, "signal_add_callback(): sigaction()");
list_del(&entry->list);
free(entry);
return -1;
}
return 0;
}
static int sig_event(int fd, void *privdata)
{
unsigned char signum;
int len = read(fd, &signum, 1);
if (len <= 0) {
log_print(LOG_WARN, "sig_event(): read()");
return -1;
}
struct signal_entry *search, *tmp;
list_for_each_entry_safe(search, tmp, &callback_list, list) {
if (search->deleted) {
list_del(&search->list);
free(search);
continue;
}
if (search->signum == signum)
search->callback(search->privdata);
}
return 0;
}
int signal_init(void)
{
if (pipe(sig_pipe) < 0) {
log_print(LOG_ERROR, "signal_init(): pipe()");
return -1;
}
if (fcntl(sig_pipe[0], F_SETFD, FD_CLOEXEC) < 0) {
log_print(LOG_WARN, "signal_init(): fcntl(FD_CLOEXEC)");
return -1;
}
if (fcntl(sig_pipe[1], F_SETFD, FD_CLOEXEC) < 0) {
log_print(LOG_WARN, "signal_init(): fcntl(FD_CLOEXEC)");
return -1;
}
event_add_readfd(NULL, sig_pipe[0], sig_event, NULL);
return 0;
}

12
signals.h Normal file
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@ -0,0 +1,12 @@
#ifndef _SIGNALS_H
#define _SIGNALS_H
#define SIG_DEFAULT 0x00
#define SIG_IGNORE 0x01
int signal_remove_callback(int signum, int type);
int signal_set_callback(int signum, void (*callback)(void *privdata), void *privdata);
int signal_init(void);
#endif // _SIGNALS_H