Thread: pgsql: Correct off-by-one when reading from pipe

Correct off-by-one when reading from pipe

In pg_basebackup.c:reached_end_position(), we're reading from an
internal pipe with our own background process but we're possibly
reading more bytes than will actually fit into our buffer due to
an off-by-one error.  As we're reading from an internal pipe
there's no real risk here, but it's good form to not depend on
such convenient arrangements.

Bug spotted by the Coverity scanner.

Back-patch to 9.2 where this showed up.

Branch
------
REL9_2_STABLE

Details
-------
http://git.postgresql.org/pg/commitdiff/a3957ac156da7e31da46a2d8e3b6c7669333cc99

Modified Files
--------------
src/bin/pg_basebackup/pg_basebackup.c |    2 +-
1 file changed, 1 insertion(+), 1 deletion(-)