summaryrefslogtreecommitdiff
path: root/source3/lib
diff options
context:
space:
mode:
authorJeremy Allison <jra@samba.org>2001-11-20 22:55:46 +0000
committerJeremy Allison <jra@samba.org>2001-11-20 22:55:46 +0000
commitd325611842beb1b1a4448df9eca42430b27dec24 (patch)
treee36164b25976ef3f4ee6c593dc5e4817eec39309 /source3/lib
parent02defd1de4a690415daf521f25bbdd7490c06840 (diff)
downloadsamba-d325611842beb1b1a4448df9eca42430b27dec24.tar.gz
samba-d325611842beb1b1a4448df9eca42430b27dec24.tar.bz2
samba-d325611842beb1b1a4448df9eca42430b27dec24.zip
Merged in JohnR's ping messaging extension.
Jeremy. (This used to be commit 694372b2c4d7713fe228114730027175f7b4e9b6)
Diffstat (limited to 'source3/lib')
-rw-r--r--source3/lib/messages.c63
1 files changed, 36 insertions, 27 deletions
diff --git a/source3/lib/messages.c b/source3/lib/messages.c
index 8a696e0c26..b4fd82139e 100644
--- a/source3/lib/messages.c
+++ b/source3/lib/messages.c
@@ -57,8 +57,9 @@ static struct dispatch_fns {
} *dispatch_fns;
/****************************************************************************
-notifications come in as signals
+ Notifications come in as signals.
****************************************************************************/
+
static void sig_usr1(void)
{
received_signal = 1;
@@ -66,16 +67,20 @@ static void sig_usr1(void)
}
/****************************************************************************
-a useful function for testing the message system
+ A useful function for testing the message system.
****************************************************************************/
+
void ping_message(int msg_type, pid_t src, void *buf, size_t len)
{
- DEBUG(1,("INFO: Received PING message from PID %u\n",(unsigned int)src));
+ char *msg = buf ? buf : "none";
+ DEBUG(1,("INFO: Received PING message from PID %u [%s]\n",(unsigned int)src, msg));
message_send_pid(src, MSG_PONG, buf, len, True);
}
+
/****************************************************************************
-return current debug level
+ Return current debug level.
****************************************************************************/
+
void debuglevel_message(int msg_type, pid_t src, void *buf, size_t len)
{
DEBUG(1,("INFO: Received REQ_DEBUGLEVEL message from PID %u\n",(unsigned int)src));
@@ -85,12 +90,13 @@ void debuglevel_message(int msg_type, pid_t src, void *buf, size_t len)
/****************************************************************************
Initialise the messaging functions.
****************************************************************************/
+
BOOL message_init(void)
{
if (tdb) return True;
tdb = tdb_open_log(lock_path("messages.tdb"),
- 0, TDB_CLEAR_IF_FIRST|TDB_DEFAULT,
+ 0, TDB_CLEAR_IF_FIRST|TDB_DEFAULT,
O_RDWR|O_CREAT,0600);
if (!tdb) {
@@ -106,10 +112,10 @@ BOOL message_init(void)
return True;
}
-
/*******************************************************************
- form a static tdb key from a pid
+ Form a static tdb key from a pid.
******************************************************************/
+
static TDB_DATA message_key_pid(pid_t pid)
{
static char key[20];
@@ -122,11 +128,11 @@ static TDB_DATA message_key_pid(pid_t pid)
return kbuf;
}
-
/****************************************************************************
-notify a process that it has a message. If the process doesn't exist
-then delete its record in the database
+ 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)
{
if (kill(pid, SIGUSR1) == -1) {
@@ -142,8 +148,9 @@ static BOOL message_notify(pid_t pid)
}
/****************************************************************************
-send a message to a particular pid
+ Send a message to a particular pid.
****************************************************************************/
+
BOOL message_send_pid(pid_t pid, int msg_type, void *buf, size_t len, BOOL duplicates_allowed)
{
TDB_DATA kbuf;
@@ -228,11 +235,10 @@ BOOL message_send_pid(pid_t pid, int msg_type, void *buf, size_t len, BOOL dupli
return False;
}
-
-
/****************************************************************************
-retrieve the next message for the current process
+ Retrieve the next message for the current process.
****************************************************************************/
+
static BOOL message_recv(int *msg_type, pid_t *src, void **buf, size_t *len)
{
TDB_DATA kbuf;
@@ -284,12 +290,12 @@ static BOOL message_recv(int *msg_type, pid_t *src, void **buf, size_t *len)
return False;
}
-
/****************************************************************************
-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
+ 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.
****************************************************************************/
+
void message_dispatch(void)
{
int msg_type;
@@ -298,10 +304,10 @@ void message_dispatch(void)
size_t len;
struct dispatch_fns *dfn;
- if (!received_signal)
- return;
+ if (!received_signal) return;
DEBUG(10,("message_dispatch: received_signal = %d\n", received_signal));
+
received_signal = 0;
while (message_recv(&msg_type, &src, &buf, &len)) {
@@ -315,10 +321,10 @@ void message_dispatch(void)
}
}
-
/****************************************************************************
-register a dispatch function for a particular message type
+ Register a dispatch function for a particular message type.
****************************************************************************/
+
void message_register(int msg_type,
void (*fn)(int msg_type, pid_t pid, void *buf, size_t len))
{
@@ -342,8 +348,9 @@ void message_register(int msg_type,
}
/****************************************************************************
-de-register the function for a particular message type
+ De-register the function for a particular message type.
****************************************************************************/
+
void message_deregister(int msg_type)
{
struct dispatch_fns *dfn, *next;
@@ -365,8 +372,9 @@ struct msg_all {
};
/****************************************************************************
-send one of the messages for the broadcast
+ 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;
@@ -396,10 +404,11 @@ static int traverse_fn(TDB_CONTEXT *the_tdb, TDB_DATA kbuf, TDB_DATA dbuf, void
}
/****************************************************************************
-this is a useful function for sending messages 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.
+ This is a useful function for sending messages 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.
****************************************************************************/
+
BOOL message_send_all(TDB_CONTEXT *conn_tdb, int msg_type, void *buf, size_t len, BOOL duplicates_allowed)
{
struct msg_all msg_all;