Tweak original coding so that we can determine the platform-specific

shared_buffers and max_connections values to use before we run the
bootstrap process.  Without this, initdb would fail on platforms where
the hardwired default values are too large.  (We could get around that
by making the hardwired defaults tiny, perhaps, but why slow down
bootstrap by starving it for buffers...)

src/backend/bootstrap/bootstrap.c

@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1994, Regents of the University of California
  *
  * IDENTIFICATION
- *	  $Header: /cvsroot/pgsql/src/backend/bootstrap/bootstrap.c,v 1.160 2003/05/28 18:19:09 tgl Exp $
+ *	  $Header: /cvsroot/pgsql/src/backend/bootstrap/bootstrap.c,v 1.161 2003/07/15 00:11:13 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -187,15 +187,16 @@ err_out(void)
 }
 
 /* usage:
-   usage help for the bootstrap backen
-*/
+ *		usage help for the bootstrap backend
+ */
 static void
 usage(void)
 {
 	fprintf(stderr,
 			gettext("Usage:\n"
-					"  postgres -boot [-d level] [-D datadir] [-F] [-o file] [-x num] dbname\n"
-					"  -d 1-5           debug mode\n"
+					"  postgres -boot [OPTION]... DBNAME\n"
+					"  -c NAME=VALUE    set run-time parameter\n"
+					"  -d 1-5           debug level\n"
 					"  -D datadir       data directory\n"
 					"  -F               turn off fsync\n"
 					"  -o file          send debug output to file\n"
@@ -253,7 +254,7 @@ BootstrapMain(int argc, char *argv[])
 												 * variable */
 	}
 
-	while ((flag = getopt(argc, argv, "B:d:D:Fo:p:x:")) != -1)
+	while ((flag = getopt(argc, argv, "B:c:d:D:Fo:p:x:-:")) != -1)
 	{
 		switch (flag)
 		{
@@ -303,6 +304,27 @@ BootstrapMain(int argc, char *argv[])
 			case 'B':
 				SetConfigOption("shared_buffers", optarg, PGC_POSTMASTER, PGC_S_ARGV);
 				break;
+			case 'c':
+			case '-':
+				{
+					char	   *name,
+							   *value;
+
+					ParseLongOption(optarg, &name, &value);
+					if (!value)
+					{
+						if (flag == '-')
+							elog(ERROR, "--%s requires argument", optarg);
+						else
+							elog(ERROR, "-c %s requires argument", optarg);
+					}
+
+					SetConfigOption(name, value, PGC_POSTMASTER, PGC_S_ARGV);
+					free(name);
+					if (value)
+						free(value);
+					break;
+				}
 			default:
 				usage();
 				break;
@@ -408,7 +430,6 @@ BootstrapMain(int argc, char *argv[])
 	switch (xlogop)
 	{
 		case BS_XLOG_NOP:
-			StartupXLOG();
 			break;
 
 		case BS_XLOG_BOOTSTRAP:
@@ -445,6 +466,15 @@ BootstrapMain(int argc, char *argv[])
 	 */
 	InitPostgres(dbname, NULL);
 
+	/*
+	 * In NOP mode, all we really want to do is create shared memory and
+	 * semaphores (just to prove we can do it with the current GUC settings).
+	 * So, quit now.
+	 */
+	if (xlogop == BS_XLOG_NOP)
+		proc_exit(0);
+
+	/* Initialize stuff for bootstrap-file processing */
 	for (i = 0; i < MAXATTR; i++)
 	{
 		attrtypes[i] = (Form_pg_attribute) NULL;
@@ -456,7 +486,7 @@ BootstrapMain(int argc, char *argv[])
 		hashtable[i] = NULL;
 
 	/*
-	 * abort processing resumes here
+	 * abort processing resumes here (this is probably dead code?)
 	 */
 	if (sigsetjmp(Warn_restart, 1) != 0)
 	{
@@ -465,20 +495,19 @@ BootstrapMain(int argc, char *argv[])
 	}
 
 	/*
-	 * process input.
-	 */
-
-	/*
+	 * Process bootstrap input.
+	 *
 	 * the sed script boot.sed renamed yyparse to Int_yyparse for the
 	 * bootstrap parser to avoid conflicts with the normal SQL parser
 	 */
 	Int_yyparse();
 
+	/* Perform a checkpoint to ensure everything's down to disk */
 	SetProcessingMode(NormalProcessing);
 	CreateCheckPoint(true, true);
 	SetProcessingMode(BootstrapProcessing);
 
-	/* clean up processing */
+	/* Clean up and exit */
 	StartTransactionCommand();
 	cleanup();
 

src/bin/initdb/initdb.sh

@@ -27,7 +27,7 @@
 # Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
 # Portions Copyright (c) 1994, Regents of the University of California
 #
-# $Header: /cvsroot/pgsql/src/bin/initdb/Attic/initdb.sh,v 1.194 2003/07/14 20:00:23 tgl Exp $
+# $Header: /cvsroot/pgsql/src/bin/initdb/Attic/initdb.sh,v 1.195 2003/07/15 00:11:14 tgl Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -536,46 +536,9 @@ else
     fi
 fi
 
-
-##########################################################################
-#
-# RUN BKI SCRIPT IN BOOTSTRAP MODE TO CREATE TEMPLATE1
-
-# common backend options
-PGSQL_OPT="-F -D$PGDATA"
-
-if [ "$debug" = yes ]
-then
-    BOOTSTRAP_TALK_ARG="-d 5"
-fi
-
-
-$ECHO_N "creating template1 database in $PGDATA/base/1... "$ECHO_C
-
-rm -rf "$PGDATA"/base/1 || exit_nicely
-mkdir "$PGDATA"/base/1 || exit_nicely
-
 # Top level PG_VERSION is checked by bootstrapper, so make it first
-echo "$short_version" > "$PGDATA/PG_VERSION" || exit_nicely
+echo "$short_version" > "$PGDATA/PG_VERSION"         || exit_nicely
 
-cat "$POSTGRES_BKI" \
-| sed -e "s/POSTGRES/$POSTGRES_SUPERUSERNAME/g" \
-      -e "s/ENCODING/$ENCODINGID/g" \
-| 
-(
-  LC_COLLATE=`pg_getlocale COLLATE`
-  LC_CTYPE=`pg_getlocale CTYPE`
-  export LC_COLLATE
-  export LC_CTYPE
-  unset LC_ALL
-  "$PGPATH"/postgres -boot -x1 $PGSQL_OPT $BOOTSTRAP_TALK_ARG template1
-) \
-|| exit_nicely
-
-# Make the per-database PGVERSION for template1 only after init'ing it
-echo "$short_version" > "$PGDATA/base/1/PG_VERSION" || exit_nicely
-
-echo "ok"
 
 ##########################################################################
 #
@@ -583,6 +546,9 @@ echo "ok"
 #
 # Use reasonable values if kernel will let us, else scale back
 
+# common backend options
+PGSQL_OPT="-F -D$PGDATA"
+
 cp /dev/null "$PGDATA"/postgresql.conf               || exit_nicely
 
 $ECHO_N "selecting default shared_buffers... "$ECHO_C
@@ -590,7 +556,7 @@ $ECHO_N "selecting default shared_buffers... "$ECHO_C
 for nbuffers in 1000 900 800 700 600 500 400 300 200 100 50
 do
     TEST_OPT="$PGSQL_OPT -c shared_buffers=$nbuffers -c max_connections=5"
-    if "$PGPATH"/postgres $TEST_OPT template1 </dev/null >/dev/null 2>&1
+    if "$PGPATH"/postgres -boot -x0 $TEST_OPT template1 </dev/null >/dev/null 2>&1
     then
 	break
     fi
@@ -603,7 +569,7 @@ $ECHO_N "selecting default max_connections... "$ECHO_C
 for nconns in 100 50 40 30 20 10
 do
     TEST_OPT="$PGSQL_OPT -c shared_buffers=$nbuffers -c max_connections=$nconns"
-    if "$PGPATH"/postgres $TEST_OPT template1 </dev/null >/dev/null 2>&1
+    if "$PGPATH"/postgres -boot -x0 $TEST_OPT template1 </dev/null >/dev/null 2>&1
     then
 	break
     fi
@@ -632,6 +598,39 @@ chmod 0600 "$PGDATA"/pg_hba.conf "$PGDATA"/pg_ident.conf \
 
 echo "ok"
 
+##########################################################################
+#
+# RUN BKI SCRIPT IN BOOTSTRAP MODE TO CREATE TEMPLATE1
+
+if [ "$debug" = yes ]
+then
+    BOOTSTRAP_TALK_ARG="-d 5"
+fi
+
+$ECHO_N "creating template1 database in $PGDATA/base/1... "$ECHO_C
+
+rm -rf "$PGDATA"/base/1 || exit_nicely
+mkdir "$PGDATA"/base/1 || exit_nicely
+
+cat "$POSTGRES_BKI" \
+| sed -e "s/POSTGRES/$POSTGRES_SUPERUSERNAME/g" \
+      -e "s/ENCODING/$ENCODINGID/g" \
+| 
+(
+  LC_COLLATE=`pg_getlocale COLLATE`
+  LC_CTYPE=`pg_getlocale CTYPE`
+  export LC_COLLATE
+  export LC_CTYPE
+  unset LC_ALL
+  "$PGPATH"/postgres -boot -x1 $PGSQL_OPT $BOOTSTRAP_TALK_ARG template1
+) \
+|| exit_nicely
+
+# Make the per-database PGVERSION for template1 only after init'ing it
+echo "$short_version" > "$PGDATA/base/1/PG_VERSION" || exit_nicely
+
+echo "ok"
+
 ##########################################################################
 #
 # CREATE VIEWS and other things