view src/log/main.c @ 22715:20415dd0b85a

dsync: Add per-mailbox sync lock that is always used. Both importing and exporting gets the lock before they even sync the mailbox. The lock is kept until the import/export finishes. This guarantees that no matter how dsync is run, two dsyncs can't be working on the same mailbox at the same time. This lock is in addition to the optional per-user lock enabled by the -l parameter. If the -l parameter is used, the same lock timeout is used for the per-mailbox lock. Otherwise 30s timeout is used. This should help to avoid email duplication when replication is enabled for public namespaces, and maybe in some other rare situations as well.
author Timo Sirainen <timo.sirainen@dovecot.fi>
date Thu, 28 Dec 2017 14:10:23 +0200
parents cb108f786fb4
children c20e74f90a73
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/* Copyright (c) 2005-2018 Dovecot authors, see the included COPYING file */

#include "lib.h"
#include "lib-signals.h"
#include "restrict-access.h"
#include "master-interface.h"
#include "master-service.h"
#include "master-service-settings.h"
#include "log-error-buffer.h"
#include "log-connection.h"
#include "doveadm-connection.h"

#include <unistd.h>

bool verbose_proctitle;
static struct log_error_buffer *errorbuf;

static void
sig_reopen_logs(const siginfo_t *si ATTR_UNUSED, void *context ATTR_UNUSED)
{
	master_service_init_log(master_service, "log: ");
}

static void main_init(void)
{
	lib_signals_set_handler(SIGUSR1, LIBSIG_FLAGS_SAFE,
				sig_reopen_logs, NULL);

	errorbuf = log_error_buffer_init();
	log_connections_init();
}

static void main_deinit(void)
{
	log_connections_deinit();
	log_error_buffer_deinit(&errorbuf);
}

static void client_connected(struct master_service_connection *conn)
{
	if (conn->fifo) {
		log_connection_create(errorbuf, conn->fd, conn->listen_fd);
		/* kludge: normally FIFOs aren't counted as connections,
		   but here we want log process to stay open until all writers
		   have closed */
		conn->fifo = FALSE;
	} else if (strcmp(conn->name, "log-errors") == 0)
		doveadm_connection_create(errorbuf, conn->fd);
	else {
		i_error("Unknown listener name: %s", conn->name);
		return;
	}

	master_service_client_connection_accept(conn);
}

int main(int argc, char *argv[])
{
	const char *error;

	master_service = master_service_init("log", 0, &argc, &argv, "");

	/* use log prefix and log to stderr until we've configured the real
	   logging */
	i_set_failure_file("/dev/stderr", "log: ");

	if (master_getopt(master_service) > 0)
		return FATAL_DEFAULT;

	if (master_service_settings_read_simple(master_service,
						NULL, &error) < 0)
		i_fatal("Error reading configuration: %s", error);
	master_service_init_log(master_service, "log: ");

	verbose_proctitle = master_service_settings_get(master_service)->verbose_proctitle;

	restrict_access_by_env(NULL, FALSE);
	restrict_access_allow_coredumps(TRUE);

	/* logging should never die if there are some clients */
	master_service_set_die_with_master(master_service, FALSE);

	main_init();
	master_service_init_finish(master_service);
	master_service_run(master_service, client_connected);
	main_deinit();
	master_service_deinit(&master_service);
        return 0;
}