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d694e0bb79
This function allows us to fsync the specified file or directory. It's useful, for example, when we want to sync the file that pg_file_write() writes out or that COPY TO exports the data into, for durability. Author: Fujii Masao Reviewed-By: Julien Rouhaud, Arthur Zakirov, Michael Paquier, Atsushi Torikoshi Discussion: https://www.postgresql.org/message-id/CAHGQGwGY8uzZ_k8dHRoW1zDcy1Z7=5GQ+So4ZkVy2u=nLsk=hA@mail.gmail.com
77 lines
2.3 KiB
SQL
77 lines
2.3 KiB
SQL
CREATE EXTENSION adminpack;
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-- create new file
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SELECT pg_file_write('test_file1', 'test1', false);
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SELECT pg_read_file('test_file1');
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-- append
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SELECT pg_file_write('test_file1', 'test1', true);
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SELECT pg_read_file('test_file1');
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-- error, already exists
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SELECT pg_file_write('test_file1', 'test1', false);
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SELECT pg_read_file('test_file1');
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-- disallowed file paths for non-superusers and users who are
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-- not members of pg_write_server_files
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CREATE ROLE regress_user1;
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GRANT pg_read_all_settings TO regress_user1;
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GRANT EXECUTE ON FUNCTION pg_file_write(text,text,bool) TO regress_user1;
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SET ROLE regress_user1;
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SELECT pg_file_write('../test_file0', 'test0', false);
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SELECT pg_file_write('/tmp/test_file0', 'test0', false);
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SELECT pg_file_write(current_setting('data_directory') || '/test_file4', 'test4', false);
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SELECT pg_file_write(current_setting('data_directory') || '/../test_file4', 'test4', false);
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RESET ROLE;
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REVOKE EXECUTE ON FUNCTION pg_file_write(text,text,bool) FROM regress_user1;
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REVOKE pg_read_all_settings FROM regress_user1;
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DROP ROLE regress_user1;
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-- sync
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SELECT pg_file_sync('test_file1'); -- sync file
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SELECT pg_file_sync('pg_stat'); -- sync directory
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SELECT pg_file_sync('test_file2'); -- not there
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-- rename file
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SELECT pg_file_rename('test_file1', 'test_file2');
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SELECT pg_read_file('test_file1'); -- not there
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SELECT pg_read_file('test_file2');
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-- error
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SELECT pg_file_rename('test_file1', 'test_file2');
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-- rename file and archive
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SELECT pg_file_write('test_file3', 'test3', false);
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SELECT pg_file_rename('test_file2', 'test_file3', 'test_file3_archive');
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SELECT pg_read_file('test_file2'); -- not there
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SELECT pg_read_file('test_file3');
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SELECT pg_read_file('test_file3_archive');
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-- unlink
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SELECT pg_file_unlink('test_file1'); -- does not exist
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SELECT pg_file_unlink('test_file2'); -- does not exist
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SELECT pg_file_unlink('test_file3');
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SELECT pg_file_unlink('test_file3_archive');
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SELECT pg_file_unlink('test_file4');
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-- superuser checks
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CREATE USER regress_user1;
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SET ROLE regress_user1;
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SELECT pg_file_write('test_file0', 'test0', false);
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SELECT pg_file_sync('test_file0');
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SELECT pg_file_rename('test_file0', 'test_file0');
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SELECT pg_file_unlink('test_file0');
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SELECT pg_logdir_ls();
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RESET ROLE;
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DROP USER regress_user1;
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-- no further tests for pg_logdir_ls() because it depends on the
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-- server's logging setup
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