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authorAndrew Tridgell <tridge@samba.org>2004-10-17 05:12:59 +0000
committerGerald (Jerry) Carter <jerry@samba.org>2007-10-10 12:59:57 -0500
commit8d1e35e2435fc0d30534393c003a1a3388704679 (patch)
treea4333303cba3b38e4bc0ea66a2cd11e95d07adab /source4
parentf42402da83afa97f821d36b7974de98ddd5a2880 (diff)
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r3014: got rid of the old intra-smbd messaging system in preparation for the new one
(This used to be commit 283e38aeb210e048302dc2759a75879cfc81eeb5)
Diffstat (limited to 'source4')
-rw-r--r--source4/lib/basic.mk3
-rw-r--r--source4/lib/dmallocmsg.c72
-rw-r--r--source4/lib/messages.c566
-rw-r--r--source4/lib/tallocmsg.c59
-rw-r--r--source4/passdb/secrets.c3
5 files changed, 0 insertions, 703 deletions
diff --git a/source4/lib/basic.mk b/source4/lib/basic.mk
index 93309ce68b..b6f30b6feb 100644
--- a/source4/lib/basic.mk
+++ b/source4/lib/basic.mk
@@ -37,9 +37,6 @@ ADD_OBJ_FILES = \
lib/fsusage.o \
lib/ms_fnmatch.o \
lib/select.o \
- lib/messages.o \
- lib/tallocmsg.o \
- lib/dmallocmsg.o \
lib/pam_errors.o \
intl/lang_tdb.o \
lib/gencache.o \
diff --git a/source4/lib/dmallocmsg.c b/source4/lib/dmallocmsg.c
deleted file mode 100644
index a83ed518d7..0000000000
--- a/source4/lib/dmallocmsg.c
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- samba -- Unix SMB/CIFS implementation.
- Copyright (C) 2002 by Martin Pool
-
- 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; either version 2 of the License, or
- (at your option) any later version.
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-#include "includes.h"
-
-/**
- * @file dmallocmsg.c
- *
- * Glue code to cause dmalloc info to come out when we receive a prod
- * over samba messaging.
- **/
-
-#ifdef ENABLE_DMALLOC
-static unsigned long our_dm_mark = 0;
-#endif /* ENABLE_DMALLOC */
-
-
-/**
- * Respond to a POOL_USAGE message by sending back string form of memory
- * usage stats.
- **/
-static void msg_req_dmalloc_mark(int UNUSED(msg_type), pid_t UNUSED(src_pid),
- void *UNUSED(buf), size_t UNUSED(len))
-{
-#ifdef ENABLE_DMALLOC
- our_dm_mark = dmalloc_mark();
- DEBUG(2,("Got MSG_REQ_DMALLOC_MARK: mark set\n"));
-#else
- DEBUG(2,("Got MSG_REQ_DMALLOC_MARK but dmalloc not in this process\n"));
-#endif
-}
-
-
-
-static void msg_req_dmalloc_log_changed(int UNUSED(msg_type),
- pid_t UNUSED(src_pid),
- void *UNUSED(buf), size_t UNUSED(len))
-{
-#ifdef ENABLE_DMALLOC
- dmalloc_log_changed(our_dm_mark, True, True, True);
- DEBUG(2,("Got MSG_REQ_DMALLOC_LOG_CHANGED: done\n"));
-#else
- DEBUG(2,("Got MSG_REQ_DMALLOC_LOG_CHANGED but dmalloc not in this process\n"));
-#endif
-}
-
-
-/**
- * Register handler for MSG_REQ_POOL_USAGE
- **/
-void register_dmalloc_msgs(void)
-{
- message_register(MSG_REQ_DMALLOC_MARK, msg_req_dmalloc_mark);
- message_register(MSG_REQ_DMALLOC_LOG_CHANGED, msg_req_dmalloc_log_changed);
- DEBUG(2, ("Registered MSG_REQ_DMALLOC_MARK and LOG_CHANGED\n"));
-}
diff --git a/source4/lib/messages.c b/source4/lib/messages.c
deleted file mode 100644
index 64dc2f510a..0000000000
--- a/source4/lib/messages.c
+++ /dev/null
@@ -1,566 +0,0 @@
-/*
- Unix SMB/CIFS implementation.
- Samba internal messaging functions
- Copyright (C) Andrew Tridgell 2000
- Copyright (C) 2001 by Martin Pool
- Copyright (C) 2002 by Jeremy Allison
-
- 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; either version 2 of the License, or
- (at your option) any later version.
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-/**
- @defgroup messages Internal messaging framework
- @{
- @file messages.c
-
- @brief Module for internal messaging between Samba daemons.
-
- The idea is that if a part of Samba wants to do communication with
- another Samba process then it will do a message_register() of a
- dispatch function, and use message_send_pid() to send messages to
- that process.
-
- The dispatch function is given the pid of the sender, and it can
- use that to reply by message_send_pid(). See ping_message() for a
- simple example.
-
- @caution Dispatch functions must be able to cope with incoming
- messages on an *odd* byte boundary.
-
- This system doesn't have any inherent size limitations but is not
- very efficient for large messages or when messages are sent in very
- quick succession.
-
-*/
-
-#include "includes.h"
-
-/* the locking database handle */
-static struct tdb_wrap *tdb;
-static int received_signal;
-
-/* change the message version with any incompatible changes in the protocol */
-#define MESSAGE_VERSION 1
-
-struct message_rec {
- int msg_version;
- int msg_type;
- pid_t dest;
- pid_t src;
- size_t len;
-};
-
-/* we have a linked list of dispatch handlers */
-static struct dispatch_fns {
- struct dispatch_fns *next, *prev;
- int msg_type;
- void (*fn)(int msg_type, pid_t pid, void *buf, size_t len);
-} *dispatch_fns;
-
-/****************************************************************************
- Notifications come in as signals.
-****************************************************************************/
-
-static void sig_usr1(void)
-{
- received_signal = 1;
- sys_select_signal();
-}
-
-/****************************************************************************
- A useful function for testing the message system.
-****************************************************************************/
-
-static void ping_message(int msg_type, pid_t src, void *buf, size_t len)
-{
- const char *msg = buf ? buf : "none";
- DEBUG(1,("INFO: Received PING message from PID %u [%s]\n",(uint_t)src, msg));
- message_send_pid(src, MSG_PONG, buf, len, True);
-}
-
-/****************************************************************************
- Initialise the messaging functions.
-****************************************************************************/
-
-BOOL message_init(void)
-{
- TALLOC_CTX *mem_ctx;
-
- if (tdb) return True;
-
- mem_ctx = talloc_init("message_init");
- if (!mem_ctx) {
- DEBUG(0,("ERROR: No memory to initialise messages database\n"));
- return False;
- }
- tdb = tdb_wrap_open(NULL, lock_path(mem_ctx, "messages.tdb"),
- 0, TDB_CLEAR_IF_FIRST|TDB_DEFAULT,
- O_RDWR|O_CREAT,0600);
- talloc_destroy(mem_ctx);
-
- if (!tdb) {
- DEBUG(0,("ERROR: Failed to initialise messages database\n"));
- return False;
- }
-
- CatchSignal(SIGUSR1, SIGNAL_CAST sig_usr1);
-
- message_register(MSG_PING, ping_message);
-
- return True;
-}
-
-/*******************************************************************
- Form a static tdb key from a pid.
-******************************************************************/
-
-static TDB_DATA message_key_pid(pid_t pid)
-{
- static char key[20];
- TDB_DATA kbuf;
-
- slprintf(key, sizeof(key)-1, "PID/%d", (int)pid);
-
- kbuf.dptr = (char *)key;
- kbuf.dsize = strlen(key)+1;
- return kbuf;
-}
-
-/****************************************************************************
- Notify a process that it has a message. If the process doesn't exist
- then delete its record in the database.
-****************************************************************************/
-
-static BOOL message_notify(pid_t pid)
-{
- /*
- * Doing kill with a non-positive pid causes messages to be
- * sent to places we don't want.
- */
-
- SMB_ASSERT(pid > 0);
-
- if (kill(pid, SIGUSR1) == -1) {
- if (errno == ESRCH) {
- DEBUG(2,("pid %d doesn't exist - deleting messages record\n", (int)pid));
- tdb_delete(tdb->tdb, message_key_pid(pid));
- } else {
- DEBUG(2,("message to process %d failed - %s\n", (int)pid, strerror(errno)));
- }
- return False;
- }
- return True;
-}
-
-/****************************************************************************
- Send a message to a particular pid.
-****************************************************************************/
-
-static BOOL message_send_pid_internal(pid_t pid, int msg_type, const void *buf, size_t len,
- BOOL duplicates_allowed, uint_t timeout)
-{
- TDB_DATA kbuf;
- TDB_DATA dbuf;
- TDB_DATA old_dbuf;
- struct message_rec rec;
- char *ptr;
- struct message_rec prec;
-
- /*
- * Doing kill with a non-positive pid causes messages to be
- * sent to places we don't want.
- */
-
- SMB_ASSERT(pid > 0);
-
- rec.msg_version = MESSAGE_VERSION;
- rec.msg_type = msg_type;
- rec.dest = pid;
- rec.src = getpid();
- rec.len = len;
-
- kbuf = message_key_pid(pid);
-
- dbuf.dptr = (void *)malloc(len + sizeof(rec));
- if (!dbuf.dptr)
- return False;
-
- memcpy(dbuf.dptr, &rec, sizeof(rec));
- if (len > 0)
- memcpy((void *)((char*)dbuf.dptr+sizeof(rec)), buf, len);
-
- dbuf.dsize = len + sizeof(rec);
-
- if (duplicates_allowed) {
-
- /* If duplicates are allowed we can just append the message and return. */
-
- /* lock the record for the destination */
- if (timeout) {
- if (tdb_chainlock_with_timeout(tdb->tdb, kbuf, timeout) == -1) {
- DEBUG(0,("message_send_pid_internal: failed to get chainlock with timeout %ul.\n", timeout));
- return False;
- }
- } else {
- if (tdb_chainlock(tdb->tdb, kbuf) == -1) {
- DEBUG(0,("message_send_pid_internal: failed to get chainlock.\n"));
- return False;
- }
- }
- tdb_append(tdb->tdb, kbuf, dbuf);
- tdb_chainunlock(tdb->tdb, kbuf);
-
- SAFE_FREE(dbuf.dptr);
- errno = 0; /* paranoia */
- return message_notify(pid);
- }
-
- /* lock the record for the destination */
- if (timeout) {
- if (tdb_chainlock_with_timeout(tdb->tdb, kbuf, timeout) == -1) {
- DEBUG(0,("message_send_pid_internal: failed to get chainlock with timeout %ul.\n", timeout));
- return False;
- }
- } else {
- if (tdb_chainlock(tdb->tdb, kbuf) == -1) {
- DEBUG(0,("message_send_pid_internal: failed to get chainlock.\n"));
- return False;
- }
- }
-
- old_dbuf = tdb_fetch(tdb->tdb, kbuf);
-
- if (!old_dbuf.dptr) {
- /* its a new record */
-
- tdb_store(tdb->tdb, kbuf, dbuf, TDB_REPLACE);
- tdb_chainunlock(tdb->tdb, kbuf);
-
- SAFE_FREE(dbuf.dptr);
- errno = 0; /* paranoia */
- return message_notify(pid);
- }
-
- /* Not a new record. Check for duplicates. */
-
- for(ptr = (char *)old_dbuf.dptr; ptr < old_dbuf.dptr + old_dbuf.dsize; ) {
- /*
- * First check if the message header matches, then, if it's a non-zero
- * sized message, check if the data matches. If so it's a duplicate and
- * we can discard it. JRA.
- */
-
- if (!memcmp(ptr, &rec, sizeof(rec))) {
- if (!len || (len && !memcmp( ptr + sizeof(rec), buf, len))) {
- tdb_chainunlock(tdb->tdb, kbuf);
- DEBUG(10,("message_send_pid_internal: discarding duplicate message.\n"));
- SAFE_FREE(dbuf.dptr);
- SAFE_FREE(old_dbuf.dptr);
- return True;
- }
- }
- memcpy(&prec, ptr, sizeof(prec));
- ptr += sizeof(rec) + prec.len;
- }
-
- /* we're adding to an existing entry */
-
- tdb_append(tdb->tdb, kbuf, dbuf);
- tdb_chainunlock(tdb->tdb, kbuf);
-
- SAFE_FREE(old_dbuf.dptr);
- SAFE_FREE(dbuf.dptr);
-
- errno = 0; /* paranoia */
- return message_notify(pid);
-}
-
-/****************************************************************************
- Send a message to a particular pid - no timeout.
-****************************************************************************/
-
-BOOL message_send_pid(pid_t pid, int msg_type, const void *buf, size_t len, BOOL duplicates_allowed)
-{
- return message_send_pid_internal(pid, msg_type, buf, len, duplicates_allowed, 0);
-}
-
-/****************************************************************************
- Send a message to a particular pid, with timeout in seconds.
-****************************************************************************/
-
-BOOL message_send_pid_with_timeout(pid_t pid, int msg_type, const void *buf, size_t len,
- BOOL duplicates_allowed, uint_t timeout)
-{
- return message_send_pid_internal(pid, msg_type, buf, len, duplicates_allowed, timeout);
-}
-
-/****************************************************************************
- Retrieve all messages for the current process.
-****************************************************************************/
-
-static BOOL retrieve_all_messages(char **msgs_buf, size_t *total_len)
-{
- TDB_DATA kbuf;
- TDB_DATA dbuf;
- TDB_DATA null_dbuf;
-
- ZERO_STRUCT(null_dbuf);
-
- *msgs_buf = NULL;
- *total_len = 0;
-
- kbuf = message_key_pid(getpid());
-
- tdb_chainlock(tdb->tdb, kbuf);
- dbuf = tdb_fetch(tdb->tdb, kbuf);
- /*
- * Replace with an empty record to keep the allocated
- * space in the tdb.
- */
- tdb_store(tdb->tdb, kbuf, null_dbuf, TDB_REPLACE);
- tdb_chainunlock(tdb->tdb, kbuf);
-
- if (dbuf.dptr == NULL || dbuf.dsize == 0) {
- SAFE_FREE(dbuf.dptr);
- return False;
- }
-
- *msgs_buf = dbuf.dptr;
- *total_len = dbuf.dsize;
-
- return True;
-}
-
-/****************************************************************************
- Parse out the next message for the current process.
-****************************************************************************/
-
-static BOOL message_recv(char *msgs_buf, size_t total_len, int *msg_type, pid_t *src, char **buf, size_t *len)
-{
- struct message_rec rec;
- char *ret_buf = *buf;
-
- *buf = NULL;
- *len = 0;
-
- if (total_len - (ret_buf - msgs_buf) < sizeof(rec))
- return False;
-
- memcpy(&rec, ret_buf, sizeof(rec));
- ret_buf += sizeof(rec);
-
- if (rec.msg_version != MESSAGE_VERSION) {
- DEBUG(0,("message version %d received (expected %d)\n", rec.msg_version, MESSAGE_VERSION));
- return False;
- }
-
- if (rec.len > 0) {
- if (total_len - (ret_buf - msgs_buf) < rec.len)
- return False;
- }
-
- *len = rec.len;
- *msg_type = rec.msg_type;
- *src = rec.src;
- *buf = ret_buf;
-
- return True;
-}
-
-/****************************************************************************
- Receive and dispatch any messages pending for this process.
- Notice that all dispatch handlers for a particular msg_type get called,
- so you can register multiple handlers for a message.
- *NOTE*: Dispatch functions must be able to cope with incoming
- messages on an *odd* byte boundary.
-****************************************************************************/
-
-void message_dispatch(void)
-{
- int msg_type;
- pid_t src;
- char *buf;
- char *msgs_buf;
- size_t len, total_len;
- struct dispatch_fns *dfn;
- int n_handled;
-
- if (!received_signal)
- return;
-
- DEBUG(10,("message_dispatch: received_signal = %d\n", received_signal));
-
- received_signal = 0;
-
- if (!retrieve_all_messages(&msgs_buf, &total_len))
- return;
-
- for (buf = msgs_buf; message_recv(msgs_buf, total_len, &msg_type, &src, &buf, &len); buf += len) {
- DEBUG(10,("message_dispatch: received msg_type=%d src_pid=%u\n",
- msg_type, (uint_t) src));
- n_handled = 0;
- for (dfn = dispatch_fns; dfn; dfn = dfn->next) {
- if (dfn->msg_type == msg_type) {
- DEBUG(10,("message_dispatch: processing message of type %d.\n", msg_type));
- dfn->fn(msg_type, src, len ? (void *)buf : NULL, len);
- n_handled++;
- }
- }
- if (!n_handled) {
- DEBUG(5,("message_dispatch: warning: no handlers registed for "
- "msg_type %d in pid %u\n",
- msg_type, (uint_t)getpid()));
- }
- }
- SAFE_FREE(msgs_buf);
-}
-
-/****************************************************************************
- Register a dispatch function for a particular message type.
- *NOTE*: Dispatch functions must be able to cope with incoming
- messages on an *odd* byte boundary.
-****************************************************************************/
-
-void message_register(int msg_type,
- void (*fn)(int msg_type, pid_t pid, void *buf, size_t len))
-{
- struct dispatch_fns *dfn;
-
- dfn = (struct dispatch_fns *)malloc(sizeof(*dfn));
-
- if (dfn != NULL) {
-
- ZERO_STRUCTPN(dfn);
-
- dfn->msg_type = msg_type;
- dfn->fn = fn;
-
- DLIST_ADD(dispatch_fns, dfn);
- }
- else {
-
- DEBUG(0,("message_register: Not enough memory. malloc failed!\n"));
- }
-}
-
-/****************************************************************************
- De-register the function for a particular message type.
-****************************************************************************/
-
-void message_deregister(int msg_type)
-{
- struct dispatch_fns *dfn, *next;
-
- for (dfn = dispatch_fns; dfn; dfn = next) {
- next = dfn->next;
- if (dfn->msg_type == msg_type) {
- DLIST_REMOVE(dispatch_fns, dfn);
- SAFE_FREE(dfn);
- }
- }
-}
-
-struct msg_all {
- int msg_type;
- uint32_t msg_flag;
- const void *buf;
- size_t len;
- BOOL duplicates;
- int n_sent;
-};
-
-/****************************************************************************
- Send one of the messages for the broadcast.
-****************************************************************************/
-
-static int traverse_fn(TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf, void *state)
-{
- struct connections_data crec;
- struct msg_all *msg_all = (struct msg_all *)state;
-
- if (dbuf.dsize != sizeof(crec))
- return 0;
-
- memcpy(&crec, dbuf.dptr, sizeof(crec));
-
- if (crec.cnum != -1)
- return 0;
-
- /* Don't send if the receiver hasn't registered an interest. */
-
- if(!(crec.bcast_msg_flags & msg_all->msg_flag))
- return 0;
-
- /* If the msg send fails because the pid was not found (i.e. smbd died),
- * the msg has already been deleted from the messages.tdb.*/
-
- if (!message_send_pid(crec.pid, msg_all->msg_type,
- msg_all->buf, msg_all->len,
- msg_all->duplicates)) {
-
- /* If the pid was not found delete the entry from connections.tdb */
-
- if (errno == ESRCH) {
- DEBUG(2,("pid %u doesn't exist - deleting connections %d [%s]\n",
- (uint_t)crec.pid, crec.cnum, crec.name));
- tdb_delete(the_tdb, kbuf);
- }
- }
- msg_all->n_sent++;
- return 0;
-}
-
-/**
- * Send a message to all smbd processes.
- *
- * It isn't very efficient, but should be OK for the sorts of
- * applications that use it. When we need efficient broadcast we can add
- * it.
- *
- * @param n_sent Set to the number of messages sent. This should be
- * equal to the number of processes, but be careful for races.
- *
- * @retval True for success.
- **/
-BOOL message_send_all(TDB_CONTEXT *conn_tdb, int msg_type,
- const void *buf, size_t len,
- BOOL duplicates_allowed,
- int *n_sent)
-{
- struct msg_all msg_all;
-
- msg_all.msg_type = msg_type;
- if (msg_type < 1000)
- msg_all.msg_flag = FLAG_MSG_GENERAL;
- else if (msg_type > 1000 && msg_type < 2000)
- msg_all.msg_flag = FLAG_MSG_NMBD;
- else if (msg_type > 2000 && msg_type < 3000)
- msg_all.msg_flag = FLAG_MSG_PRINTING;
- else if (msg_type > 3000 && msg_type < 4000)
- msg_all.msg_flag = FLAG_MSG_SMBD;
- else
- return False;
-
- msg_all.buf = buf;
- msg_all.len = len;
- msg_all.duplicates = duplicates_allowed;
- msg_all.n_sent = 0;
-
- tdb_traverse(conn_tdb, traverse_fn, &msg_all);
- if (n_sent)
- *n_sent = msg_all.n_sent;
- return True;
-}
-/** @} **/
diff --git a/source4/lib/tallocmsg.c b/source4/lib/tallocmsg.c
deleted file mode 100644
index 22870a934a..0000000000
--- a/source4/lib/tallocmsg.c
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- samba -- Unix SMB/CIFS implementation.
- Copyright (C) 2001, 2002 by Martin Pool
-
- 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; either version 2 of the License, or
- (at your option) any later version.
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-#include "includes.h"
-
-/**
- * @file tallocmsg.c
- *
- * Glue code between talloc profiling and the Samba messaging system.
- **/
-
-
-/**
- * Respond to a POOL_USAGE message by sending back string form of memory
- * usage stats.
- **/
-void msg_pool_usage(int msg_type, pid_t src_pid,
- void *UNUSED(buf), size_t UNUSED(len))
-{
- const char *reply="NOT IMPLEMENTED\n";
- TALLOC_CTX *reply_pool = talloc_init("msg_pool_usage");
-
- SMB_ASSERT(msg_type == MSG_REQ_POOL_USAGE);
-
- DEBUG(2,("Got POOL_USAGE\n"));
-
-#if 0
- reply = talloc_describe_all(reply_pool);
-#endif
- message_send_pid(src_pid, MSG_POOL_USAGE,
- reply, strlen(reply)+1, True);
-
- talloc_destroy(reply_pool);
-}
-
-/**
- * Register handler for MSG_REQ_POOL_USAGE
- **/
-void register_msg_pool_usage(void)
-{
- message_register(MSG_REQ_POOL_USAGE, msg_pool_usage);
- DEBUG(2, ("Registered MSG_REQ_POOL_USAGE\n"));
-}
diff --git a/source4/passdb/secrets.c b/source4/passdb/secrets.c
index 60b197de93..add3845d75 100644
--- a/source4/passdb/secrets.c
+++ b/source4/passdb/secrets.c
@@ -123,9 +123,6 @@ BOOL secrets_named_mutex(const char *name, uint_t timeout, size_t *p_ref_count)
size_t ref_count = *p_ref_count;
int ret = 0;
- if (!message_init())
- return False;
-
if (ref_count == 0) {
ret = tdb_lock_bystring(tdb->tdb, name, timeout);
if (ret == 0)