Hi, I was just setting up streaming replication for the first time. I ran pg_basebackup on the slave. It copied 1.5TB of data. Then it errored out with: ``` 1498215035/1498215035 kB (100%), 1/1 tablespace pg_basebackup: could not get write-ahead log end position from server: ERROR: could not open file "./postgresql.conf~": Permission denied pg_basebackup: removing data directory "/var/lib/pgsql/10/data" bash-4.2$ ``` Now, I know what this error means. There was a root owned file at "/var/lib/pgsql/10/data/postgresql.conf~" which contained an old version of our postgres config and was not readable by the postgres user. I'll delete this file and try again. However, in the mean time: I feel like it would be useful for pg_basebackup to check that it has read access to all of the existing files in the source directory at the start, before it begins it's copy. I'd like to submit this as a feature request, but I'm struggling to find how to do that. So here I am... Can anyone point me in the right direction? Regards, Mike
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