An attempt to restrict the search path to avoid injections

An alternative way to fix #168 which is not as invasive as the changes
in #171.

This currently breaks the current behaviour of the program as the tables
specified on command line are not found.

bin/pgut/pgut-fe.c

@@ -99,6 +99,9 @@ setup_workers(int num_workers)
 				break;
 			}
 
+			/* Hardcode a search path to avoid injections into public or pg_temp */
+			pgut_command(conn, "SET search_path TO pg_catalog, pg_temp", 0, NULL);
+
             /* Make sure each worker connection can work in non-blocking
              * mode.
              */

bin/pgut/pgut.c

@@ -504,6 +504,9 @@ pgut_connect(const char *info, YesNo prompt, int elevel)
 				termStringInfo(&add_pass);
 			free(passwd);
 
+			/* Hardcode a search path to avoid injections into public or pg_temp */
+			pgut_command(conn, "SET search_path TO pg_catalog, pg_temp", 0, NULL);
+
 			return conn;
 		}