Re: [HACKERS] pg_basebackup --progress output for batch execution

On Fri, Nov 10, 2017 at 10:32:23AM -0300, Martín Marqués wrote:
> An example where using isatty() might fail is if you run pg_basebackup
> from a tty but redirect the output to a file, I believe that in that
> case isatty() will return true, but it's very likely that the user
> might want batch mode output.

Sorry if I misunderstood you. I think this can happen if you redirect only standard output (stdout) to a file.
But pg_basebackup writes messages to stderr. So you need redirect stderr too:

pg_basebackup -D data -X stream -R --progress --verbose &> backup

or

pg_basebackup -D data_repl -X stream -R --progress --verbose > backup 2>&1

If you redirect stderr too then isatty() will know that message output is not tty.

-- 
Arthur Zakirov
Postgres Professional: http://www.postgrespro.com
Russian Postgres Company