Support show-guc mode in pgconf.sh.

pgcommon.sh

@@ -122,7 +122,8 @@ show_guc ()
 	GUCNAME="$1"
 	CONFPATH="$2"
 
-	grep -E ^$GUCNAME\ \|\#$GUCNAME\  $CONFPATH | awk 'NR==1 {v=$3} NR!=1 && $1!~"#" {v=$3} END {print v}'
+	grep -E ^$GUCNAME\ \|\#$GUCNAME\  $CONFPATH | \
+		awk 'NR==1 {n=$1; v=$3} NR!=1 && $1!~"#" {n=$1; v=$3} END { if (n!="") print n " = " v}'
 }
 
 find_all_pgdata ()

pgconf.sh

@@ -3,6 +3,7 @@
 . pgcommon.sh
 
 CONFFILE="postgresql.conf"
+SHOWGUCS=
 
 usage ()
 {
@@ -12,9 +13,10 @@ usage ()
 	echo "  $PROGNAME [OPTIONS] [PGDATA]"
 	echo ""
 	echo "Options:"
-	echo "  -p    postgresql.conf (default)"
-	echo "  -h    pg_hba.conf"
-	echo "  -r    recovery.conf"
+	echo "  -p               opens postgresql.conf (default)"
+	echo "  -h               opens pg_hba.conf"
+	echo "  -r               opens recovery.conf"
+	echo "  -s NAME[,...]    shows values of specified parameters"
 }
 
 while [ $# -gt 0 ]; do
@@ -28,6 +30,9 @@ while [ $# -gt 0 ]; do
 			CONFFILE="pg_hba.conf";;
 		-r)
 			CONFFILE="recovery.conf";;
+		-s)
+			SHOWGUCS="$2 $SHOWGUCS"
+			shift;;
 		-*)
 			elog "invalid option: $1";;
 		*)
@@ -39,4 +44,12 @@ done
 here_is_installation
 pgdata_exists
 
+if [ ! -z "$SHOWGUCS" ]; then
+	CONFFILE="postgresql.conf"
+	for gucname in $(echo "$SHOWGUCS" | sed s/','/' '/g); do
+		show_guc "$gucname" $PGDATA/$CONFFILE
+	done
+	exit 0
+fi
+
 emacs $PGDATA/$CONFFILE &