Introduce a psql "\connect -reuse-previous=on|off" option.

The decision to reuse values of parameters from a previous connection
has been based on whether the new target is a conninfo string.  Add this
means of overriding that default.  This feature arose as one component
of a fix for security vulnerabilities in pg_dump, pg_dumpall, and
pg_upgrade, so back-patch to 9.1 (all supported versions).  In 9.3 and
later, comment paragraphs that required update had already-incorrect
claims about behavior when no connection is open; fix those problems.

Security: CVE-2016-5424

1 files changed, 1 insertions, 1 deletions

diff --git a/src/bin/psql/startup.c b/src/bin/psql/startup.c
index 5d079553dd0..bb609c2d5f7 100644
--- a/src/bin/psql/startup.c
+++ b/src/bin/psql/startup.c
@@ -210,7 +210,7 @@ main(int argc, char *argv[])
 		values[2] = options.username;
 		keywords[3] = "password";
 		values[3] = password;
-		keywords[4] = "dbname";
+		keywords[4] = "dbname"; /* see do_connect() */
 		values[4] = (options.action == ACT_LIST_DB &&
 					 options.dbname == NULL) ?
 			"postgres" : options.dbname;