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Commit00482fd

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Partial solution for 'unexpected EOF' problem with pg_disconnect: it
seems we have a choice between annoying messages and leaking memory(or dumping core, but that's right out). Patch also fixes severalother problems in pg_disconnect, such as being willing to close achannel that isn't a PG channel.
1 parentb28b053 commit00482fd

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2 files changed

+36
-13
lines changed

2 files changed

+36
-13
lines changed

‎src/interfaces/libpgtcl/pgtclCmds.c‎

Lines changed: 6 additions & 8 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/interfaces/libpgtcl/Attic/pgtclCmds.c,v 1.66 2002/09/0221:51:47 tgl Exp $
11+
* $Header: /cvsroot/pgsql/src/interfaces/libpgtcl/Attic/pgtclCmds.c,v 1.67 2002/09/0223:41:16 tgl Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -399,7 +399,6 @@ Pg_connect(ClientData cData, Tcl_Interp *interp, int argc, char *argv[])
399399
int
400400
Pg_disconnect(ClientDatacData,Tcl_Interp*interp,intargc,char*argv[])
401401
{
402-
Pg_ConnectionId*connid;
403402
PGconn*conn;
404403
Tcl_Channelconn_chan;
405404

@@ -413,15 +412,14 @@ Pg_disconnect(ClientData cData, Tcl_Interp *interp, int argc, char *argv[])
413412
if (conn_chan==NULL)
414413
{
415414
Tcl_ResetResult(interp);
416-
Tcl_AppendResult(interp,argv[1]," is not a valid connection\n",0);
415+
Tcl_AppendResult(interp,argv[1]," is not a valid connection",0);
417416
returnTCL_ERROR;
418417
}
419418

420-
#ifTCL_MAJOR_VERSION >=8
421-
conn=PgGetConnectionId(interp,argv[1],&connid);
422-
if (connid->notifier_channel!=NULL)
423-
Tcl_UnregisterChannel(interp,connid->notifier_channel);
424-
#endif
419+
/* Check that it is a PG connection and not something else */
420+
conn=PgGetConnectionId(interp,argv[1], (Pg_ConnectionId**)NULL);
421+
if (conn== (PGconn*)NULL)
422+
returnTCL_ERROR;
425423

426424
returnTcl_UnregisterChannel(interp,conn_chan);
427425
}

‎src/interfaces/libpgtcl/pgtclId.c‎

Lines changed: 30 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -13,7 +13,7 @@
1313
* Portions Copyright (c) 1994, Regents of the University of California
1414
*
1515
* IDENTIFICATION
16-
* $Header: /cvsroot/pgsql/src/interfaces/libpgtcl/Attic/pgtclId.c,v 1.33 2002/09/0221:51:47 tgl Exp $
16+
* $Header: /cvsroot/pgsql/src/interfaces/libpgtcl/Attic/pgtclId.c,v 1.34 2002/09/0223:41:17 tgl Exp $
1717
*
1818
*-------------------------------------------------------------------------
1919
*/
@@ -144,6 +144,7 @@ static void
144144
PgWatchProc(ClientDatainstanceData,intmask)
145145
{
146146
}
147+
147148
staticint
148149
PgGetHandleProc(ClientDatainstanceData,intdirection,
149150
ClientData*handlePtr)
@@ -193,7 +194,7 @@ PgSetConnectionId(Tcl_Interp *interp, PGconn *conn)
193194

194195
#ifTCL_MAJOR_VERSION >=8
195196
connid->notifier_channel=Tcl_MakeTcpClientChannel((ClientData)PQsocket(conn));
196-
Tcl_RegisterChannel(interp,connid->notifier_channel);
197+
Tcl_RegisterChannel(NULL,connid->notifier_channel);
197198
#else
198199
connid->notifier_socket=-1;
199200
#endif
@@ -227,6 +228,8 @@ PgGetConnectionId(Tcl_Interp *interp, char *id, Pg_ConnectionId ** connid_p)
227228
{
228229
Tcl_ResetResult(interp);
229230
Tcl_AppendResult(interp,id," is not a valid postgresql connection",0);
231+
if (connid_p)
232+
*connid_p=NULL;
230233
return (PGconn*)NULL;
231234
}
232235

@@ -285,6 +288,25 @@ PgDelConnectionId(DRIVER_DEL_PROTO)
285288
PQfinish(connid->conn);
286289
connid->conn=NULL;
287290

291+
/*
292+
* Kill the notifier channel, too. We must not do this until after
293+
* we've closed the libpq connection, because Tcl will try to close
294+
* the socket itself!
295+
*
296+
* XXX Unfortunately, while this works fine if we are closing due to
297+
* explicit pg_disconnect, Tcl versions through 8.3.3 dump core if we
298+
* try to do it during interpreter shutdown. Not clear why, or if
299+
* there is a workaround. For now, accept leakage of the (fairly
300+
* small) amount of memory taken for the channel state representation.
301+
* Note we are not leaking a socket, since libpq closed that already.
302+
*/
303+
#ifdefNOT_USED
304+
#ifTCL_MAJOR_VERSION >=8
305+
if (connid->notifier_channel!=NULL)
306+
Tcl_UnregisterChannel(NULL,connid->notifier_channel);
307+
#endif
308+
#endif
309+
288310
/*
289311
* We must use Tcl_EventuallyFree because we don't want the connid
290312
* struct to vanish instantly if Pg_Notify_EventProc is active for it.
@@ -782,8 +804,10 @@ PgStartNotifyEventSource(Pg_ConnectionId * connid)
782804
if (pqsock >=0)
783805
{
784806
#ifTCL_MAJOR_VERSION >=8
785-
Tcl_CreateChannelHandler(connid->notifier_channel,TCL_READABLE,
786-
Pg_Notify_FileHandler, (ClientData)connid);
807+
Tcl_CreateChannelHandler(connid->notifier_channel,
808+
TCL_READABLE,
809+
Pg_Notify_FileHandler,
810+
(ClientData)connid);
787811
#else
788812
/* In Tcl 7.5 and 7.6, we need to gin up a Tcl_File. */
789813
Tcl_Filetclfile=Tcl_GetFile((ClientData)pqsock,TCL_UNIX_FD);
@@ -805,7 +829,8 @@ PgStopNotifyEventSource(Pg_ConnectionId * connid, bool allevents)
805829
{
806830
#ifTCL_MAJOR_VERSION >=8
807831
Tcl_DeleteChannelHandler(connid->notifier_channel,
808-
Pg_Notify_FileHandler, (ClientData)connid);
832+
Pg_Notify_FileHandler,
833+
(ClientData)connid);
809834
#else
810835
/* In Tcl 7.5 and 7.6, we need to gin up a Tcl_File. */
811836
Tcl_Filetclfile=Tcl_GetFile((ClientData)connid->notifier_socket,

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