Fix uninitialized memory bug

Add support for PGHOST, PGPORT, PGUSER environment variables

Author: tatsuo-ishii

contrib/pgbench/README.pgbench

@@ -164,6 +164,10 @@ Basically it is same as BSD license. See pgbench.c for more details.
 
 o History
 
+2003/06/10
+	* fix uninitialized memory bug
+	* add support for PGHOST, PGPORT, PGUSER environment variables
+
 2002/07/20
 	* patch contributed by Neil Conway.
 	* code/document clean up and add -l option.

contrib/pgbench/README.pgbench_jis

@@ -184,6 +184,10 @@ pgbench $B$O@P0f(B $BC#IW$K$h$C$F=q$+$l$^$7$?!%%i%$%;%s%9>r7o$O(B pgbench.c
 
 $B"#2~DjMzNr(B
 
+2003/06/10
+	* $B%a%b%j$,=i4|2=$5$l$F$$$J$$%P%0$r=$@5(B
+	* $B4D6-JQ?t(BPGHOST, PGPORT, PGUSER$B$rG'<1$9$k$h$&$K$7$?!%(B
+
 2002/07/20
 	* Nei Conway$B$5$s$N%Q%C%A$rE,MQ!%(B
 	* -l $B%*%W%7%g%s$NDI2C!%(B

contrib/pgbench/pgbench.c

@@ -1,5 +1,5 @@
 /*
- * $Header: /cvsroot/pgsql/contrib/pgbench/pgbench.c,v 1.23 2003/05/14 03:25:56 tgl Exp $
+ * $Header: /cvsroot/pgsql/contrib/pgbench/pgbench.c,v 1.24 2003/06/10 09:07:15 ishii Exp $
  *
  * pgbench: a simple TPC-B like benchmark program for PostgreSQL
  * written by Tatsuo Ishii
@@ -694,6 +694,14 @@ main(int argc, char **argv)
 
 	PGconn	   *con;
 	PGresult   *res;
+	char	   *env;
+
+	if ((env = getenv("PGHOST")) != NULL && *env != '\0')
+		pghost = env;
+	if ((env = getenv("PGPORT")) != NULL && *env != '\0')
+		pgport = env;
+	else if ((env = getenv("PGUSER")) != NULL && *env != '\0')
+		login = env;
 
 	while ((c = getopt(argc, argv, "ih:nvp:dc:t:s:U:P:CNSl")) != -1)
 	{
@@ -788,8 +796,11 @@ main(int argc, char **argv)
 		dbName = argv[optind];
 	else
 	{
-		dbName = getenv("USER");
-		if (dbName == NULL)
+		if ((env = getenv("PGDATABASE")) != NULL && *env != '\0')
+			dbName = env;
+		else if (login != NULL && *login != '\0')
+			dbName = login;
+		else
 			dbName = "";
 	}
 
@@ -802,7 +813,7 @@ main(int argc, char **argv)
 	remains = nclients;
 
 	state = (CState *) malloc(sizeof(*state) * nclients);
-	memset(state, 0, sizeof(*state));
+	memset(state, 0, sizeof(*state) * nclients);
 
 	if (use_log)
 	{