CREATE EXTENSION adminpack;

-- create new file
SELECT pg_file_write('test_file1', 'test1', false);
SELECT pg_read_file('test_file1');

-- append
SELECT pg_file_write('test_file1', 'test1', true);
SELECT pg_read_file('test_file1');

-- error, already exists
SELECT pg_file_write('test_file1', 'test1', false);
SELECT pg_read_file('test_file1');

-- disallowed file paths for non-superusers and users who are
-- not members of pg_write_server_files
CREATE ROLE regress_user1;

GRANT pg_read_all_settings TO regress_user1;
GRANT EXECUTE ON FUNCTION pg_file_write(text,text,bool) TO regress_user1;

SET ROLE regress_user1;
SELECT pg_file_write('../test_file0', 'test0', false);
SELECT pg_file_write('/tmp/test_file0', 'test0', false);
SELECT pg_file_write(current_setting('data_directory') || '/test_file4', 'test4', false);
SELECT pg_file_write(current_setting('data_directory') || '/../test_file4', 'test4', false);
RESET ROLE;
REVOKE EXECUTE ON FUNCTION pg_file_write(text,text,bool) FROM regress_user1;
REVOKE pg_read_all_settings FROM regress_user1;
DROP ROLE regress_user1;

-- sync
SELECT pg_file_sync('test_file1'); -- sync file
SELECT pg_file_sync('pg_stat'); -- sync directory
SELECT pg_file_sync('test_file2'); -- not there

-- rename file
SELECT pg_file_rename('test_file1', 'test_file2');
SELECT pg_read_file('test_file1');  -- not there
SELECT pg_read_file('test_file2');

-- error
SELECT pg_file_rename('test_file1', 'test_file2');

-- rename file and archive
SELECT pg_file_write('test_file3', 'test3', false);
SELECT pg_file_rename('test_file2', 'test_file3', 'test_file3_archive');
SELECT pg_read_file('test_file2');  -- not there
SELECT pg_read_file('test_file3');
SELECT pg_read_file('test_file3_archive');


-- unlink
SELECT pg_file_unlink('test_file1');  -- does not exist
SELECT pg_file_unlink('test_file2');  -- does not exist
SELECT pg_file_unlink('test_file3');
SELECT pg_file_unlink('test_file3_archive');
SELECT pg_file_unlink('test_file4');


-- superuser checks
CREATE USER regress_user1;
SET ROLE regress_user1;

SELECT pg_file_write('test_file0', 'test0', false);
SELECT pg_file_sync('test_file0');
SELECT pg_file_rename('test_file0', 'test_file0');
SELECT pg_file_unlink('test_file0');
SELECT pg_logdir_ls();

RESET ROLE;
DROP USER regress_user1;

-- allowed file paths for superuser test
CREATE ROLE regress_superuser1 SUPERUSER;
GRANT pg_read_all_settings TO regress_superuser1;
GRANT EXECUTE ON FUNCTION pg_file_write(text,text,bool) TO regress_superuser1;

SET ROLE regress_superuser1;
SELECT pg_file_write('../supper_test_file0', 'test0', false);
SELECT pg_file_write('/tmp/supper_test_file0', 'test0', false);
SELECT pg_file_write(current_setting('data_directory') || '/supper_test_file4', 'test4', false);
SELECT pg_file_write(current_setting('data_directory') || '/../supper_test_file4', 'test4', false);
SELECT pg_file_unlink('../supper_test_file0');
SELECT pg_file_unlink('/tmp/supper_test_file0');
SELECT pg_file_unlink(current_setting('data_directory') || '/supper_test_file4');
SELECT pg_file_unlink(current_setting('data_directory') || '/../supper_test_file4');
RESET ROLE;
REVOKE EXECUTE ON FUNCTION pg_file_write(text,text,bool) FROM regress_superuser1;
REVOKE pg_read_all_settings FROM regress_superuser1;
DROP ROLE regress_superuser1;

-- no further tests for pg_logdir_ls() because it depends on the
-- server's logging setup