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A client_encoding specification coming from the connection request has

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to be processed by GUC before InitPostgres, because any required lookup
of the encoding conversion function has to be done during InitializeClientEncoding.
So, I broke this last week by moving GUC processing to after InitPostgres :-(.
What we can do as a compromise is process non-SUSET variables during
command line scanning (the same as before), and postpone the processing
of only SUSET variables.  None of the SUSET variables need to be set
before InitPostgres.
REL8_0_STABLE
Tom Lane 21 years ago
parent 5597fee8d7
commit cf796cc702
3 changed files with 78 additions and 43 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 97
      src/backend/tcop/postgres.c
  2. 17
      src/backend/utils/misc/guc.c
  3. 7
      src/include/utils/guc.h

97
src/backend/tcop/postgres.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.438 2004/11/20 00:48:58 tgl Exp $
* $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.439 2004/11/24 19:50:59 tgl Exp $
*
* NOTES
* this is the "main" module of the postgres backend and
@ -2205,7 +2205,7 @@ PostgresMain(int argc, char *argv[], const char *username)
bool secure;
int errs = 0;
int debug_flag = -1; /* -1 means not given */
List *guc_names = NIL; /* for possibly-SUSET options */
List *guc_names = NIL; /* for SUSET options */
List *guc_values = NIL;
GucContext ctx;
GucSource gucsource;
@ -2456,8 +2456,15 @@ PostgresMain(int argc, char *argv[], const char *username)
/*
* s - report usage statistics (timings) after each query
*
* Since log options are SUSET, we need to postpone unless
* still in secure context
*/
PendingConfigOption("log_statement_stats", "true");
if (ctx == PGC_BACKEND)
PendingConfigOption("log_statement_stats", "true");
else
SetConfigOption("log_statement_stats", "true",
ctx, gucsource);
break;
case 't':
@ -2490,7 +2497,12 @@ PostgresMain(int argc, char *argv[], const char *username)
break;
}
if (tmp)
PendingConfigOption(tmp, "true");
{
if (ctx == PGC_BACKEND)
PendingConfigOption(tmp, "true");
else
SetConfigOption(tmp, "true", ctx, gucsource);
}
break;
case 'v':
@ -2527,7 +2539,14 @@ PostgresMain(int argc, char *argv[], const char *username)
optarg)));
}
PendingConfigOption(name, value);
/*
* If a SUSET option, must postpone evaluation, unless
* we are still reading secure switches.
*/
if (ctx == PGC_BACKEND && IsSuperuserConfigOption(name))
PendingConfigOption(name, value);
else
SetConfigOption(name, value, ctx, gucsource);
free(name);
if (value)
free(value);
@ -2540,6 +2559,32 @@ PostgresMain(int argc, char *argv[], const char *username)
}
}
/*
* Process any additional GUC variable settings passed in startup
* packet. These are handled exactly like command-line variables.
*/
if (MyProcPort != NULL)
{
ListCell *gucopts = list_head(MyProcPort->guc_options);
while (gucopts)
{
char *name;
char *value;
name = lfirst(gucopts);
gucopts = lnext(gucopts);
value = lfirst(gucopts);
gucopts = lnext(gucopts);
if (IsSuperuserConfigOption(name))
PendingConfigOption(name, value);
else
SetConfigOption(name, value, PGC_BACKEND, PGC_S_CLIENT);
}
}
/* Acquire configuration parameters, unless inherited from postmaster */
if (!IsUnderPostmaster)
{
@ -2677,10 +2722,8 @@ PostgresMain(int argc, char *argv[], const char *username)
SetProcessingMode(NormalProcessing);
/*
* Now that we know if client is a superuser, we can apply GUC options
* that came from the client. (For option switches that are definitely
* not SUSET, we just went ahead and applied them above, but anything
* that is or might be SUSET has to be postponed to here.)
* Now that we know if client is a superuser, we can try to apply SUSET
* GUC options that came from the client.
*/
ctx = am_superuser ? PGC_SUSET : PGC_USERSET;
@ -2703,41 +2746,19 @@ PostgresMain(int argc, char *argv[], const char *username)
}
}
/*
* Process any additional GUC variable settings passed in startup
* packet.
*/
if (MyProcPort != NULL)
{
ListCell *gucopts = list_head(MyProcPort->guc_options);
while (gucopts)
{
char *name;
char *value;
name = lfirst(gucopts);
gucopts = lnext(gucopts);
value = lfirst(gucopts);
gucopts = lnext(gucopts);
SetConfigOption(name, value, ctx, PGC_S_CLIENT);
}
/*
* set up handler to log session end.
*/
if (IsUnderPostmaster && Log_disconnections)
on_proc_exit(log_disconnections, 0);
}
/*
* Now all GUC states are fully set up. Report them to client if
* appropriate.
*/
BeginReportingGUCOptions();
/*
* Also set up handler to log session end; we have to wait till now
* to be sure Log_disconnections has its final value.
*/
if (IsUnderPostmaster && Log_disconnections)
on_proc_exit(log_disconnections, 0);
/*
* Send this backend's cancellation info to the frontend.
*/

17
src/backend/utils/misc/guc.c
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@ -10,7 +10,7 @@
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.249 2004/11/14 19:35:33 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.250 2004/11/24 19:51:03 tgl Exp $
*
*--------------------------------------------------------------------
*/
@ -3864,6 +3864,21 @@ GetConfigOptionResetString(const char *name)
return NULL;
}
/*
* Detect whether the given configuration option can only be set by
* a superuser.
*/
bool
IsSuperuserConfigOption(const char *name)
{
struct config_generic *record;
record = find_option(name, ERROR);
/* On an unrecognized name, don't error, just return false. */
if (record == NULL)
return false;
return (record->context == PGC_SUSET);
}
/*

7
src/include/utils/guc.h
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@ -7,7 +7,7 @@
* Copyright (c) 2000-2004, PostgreSQL Global Development Group
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* $PostgreSQL: pgsql/src/include/utils/guc.h,v 1.56 2004/11/14 19:35:35 tgl Exp $
* $PostgreSQL: pgsql/src/include/utils/guc.h,v 1.57 2004/11/24 19:51:05 tgl Exp $
*--------------------------------------------------------------------
*/
#ifndef GUC_H
@ -44,9 +44,7 @@
* given backend once it's started, but they can vary across backends.
*
* SUSET options can be set at postmaster startup, with the SIGHUP
* mechanism, or from SQL if you're a superuser. These options cannot
* be set in the connection startup packet, because when it is processed
* we don't yet know if the user is a superuser.
* mechanism, or from SQL if you're a superuser.
*
* USERSET options can be set by anyone any time.
*/
@ -177,6 +175,7 @@ extern void EmitWarningsOnPlaceholders(const char *className);
extern const char *GetConfigOption(const char *name);
extern const char *GetConfigOptionResetString(const char *name);
extern bool IsSuperuserConfigOption(const char *name);
extern void ProcessConfigFile(GucContext context);
extern void InitializeGUCOptions(void);
extern bool SelectConfigFiles(const char *userDoption, const char *progname);

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