From 19c0422ad012636d00ba221bd7052cb71448efca Mon Sep 17 00:00:00 2001
From: Robert Haas <rhaas@postgresql.org>
Date: Fri, 3 Apr 2020 19:01:59 -0400
Subject: [PATCH] pg_validatebackup: Adjust TAP tests to undo permissions
 change.

It may be necessary to go further and remove this test altogether,
but I'm going to try this fix first. It's not clear, at least to
me, exactly how this is breaking buildfarm members, but it appears
to be doing so.
---
 src/bin/pg_validatebackup/t/003_corruption.pl | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/bin/pg_validatebackup/t/003_corruption.pl b/src/bin/pg_validatebackup/t/003_corruption.pl
index 416bc9194f0..7a09d02e6c7 100644
--- a/src/bin/pg_validatebackup/t/003_corruption.pl
+++ b/src/bin/pg_validatebackup/t/003_corruption.pl
@@ -80,6 +80,7 @@ my @scenario = (
 	{
 		'name' => 'open_directory_fails',
 		'mutilate' => \&mutilate_open_directory_fails,
+		'cleanup' => \&cleanup_open_directory_fails,
 		'fails_like' => qr/could not open directory/,
 		'skip_on_windows' => 1
 	},
@@ -245,6 +246,15 @@ sub mutilate_open_directory_fails
 	return;
 }
 
+# restore permissions on the unreadable directory we created.
+sub cleanup_open_directory_fails
+{
+	my ($backup_path) = @_;
+	my $pathname = "$backup_path/pg_subtrans";
+	chmod(0700, $pathname) || die "chmod $pathname: $!";
+	return;
+}
+
 # Create a directory that can't be searched. (This is skipped on Windows.)
 sub mutilate_search_directory_fails
 {