Minor cleanup of libpq/LO examples: fix some memory leaks, update a comment

or two.

src/test/examples/testlibpq.c

@@ -1,7 +1,7 @@
 /*
  * testlibpq.c
  *
- *		Test the C version of LIBPQ, the POSTGRES frontend library.
+ *		Test the C version of libpq, the PostgreSQL frontend library.
  */
 #include <stdio.h>
 #include <stdlib.h>

src/test/examples/testlibpq4.c

@@ -92,8 +92,8 @@ main(int argc, char **argv)
 	}
 
 	/*
-	 * should PQclear PGresult whenever it is no longer needed to avoid
-	 * memory leaks
+	 * make sure to PQclear() a PGresult whenever it is no longer
+	 * needed to avoid memory leaks
 	 */
 	PQclear(res1);
 
@@ -106,7 +106,7 @@ main(int argc, char **argv)
 	{
 		fprintf(stderr, "DECLARE CURSOR command failed\n");
 		PQclear(res1);
-		exit_nicely(conn1, NULL);
+		exit_nicely(conn1, conn2);
 	}
 	PQclear(res1);
 
@@ -115,7 +115,7 @@ main(int argc, char **argv)
 	{
 		fprintf(stderr, "FETCH ALL command didn't return tuples properly\n");
 		PQclear(res1);
-		exit_nicely(conn1, NULL);
+		exit_nicely(conn1, conn2);
 	}
 
 	/* first, print out the attribute names */
@@ -142,10 +142,10 @@ main(int argc, char **argv)
 	res1 = PQexec(conn1, "END");
 	PQclear(res1);
 
-	/* close the connection to the database and cleanup */
+	/* close the connections to the database and cleanup */
 	PQfinish(conn1);
+	PQfinish(conn2);
 
 /*	 fclose(debug); */
-	return 0;					/* Though PQfinish(conn1) has called
-								 * exit(1) */
+	return 0;
 }

src/test/examples/testlo.c

@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/test/examples/testlo.c,v 1.22 2004/08/29 04:13:12 momjian Exp $
+ *	  $PostgreSQL: pgsql/src/test/examples/testlo.c,v 1.23 2004/09/22 05:12:45 neilc Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -99,6 +99,7 @@ pickout(PGconn *conn, Oid lobjId, int start, int len)
 		if (nbytes <= 0)
 			break;				/* no more data? */
 	}
+	free(buf);
 	fprintf(stderr, "\n");
 	lo_close(conn, lobj_fd);
 }
@@ -134,6 +135,7 @@ overwrite(PGconn *conn, Oid lobjId, int start, int len)
 			break;
 		}
 	}
+	free(buf);
 	fprintf(stderr, "\n");
 	lo_close(conn, lobj_fd);
 }