pg_controldata: Prevent division-by-zero errors
If the control file is corrupted and specifies the WAL segment size
to be 0 bytes, calculating the latest checkpoint's REDO WAL file
will fail with a division-by-zero error. Show it as "???" instead.
Also reword the warning message a bit and send it to stdout, like the
other pre-existing warning messages.
Add some tests for dealing with a corrupted pg_control file.
Author: Nathan Bossart <bossartn@amazon.com>, tests by me
Branch
------
master
Details
-------
https://git.postgresql.org/pg/commitdiff/4731d848f23e08a9396b4831d13fbb6dd460faf2
Modified Files
--------------
src/bin/pg_controldata/pg_controldata.c | 26 ++++++++++++++++++--------
src/bin/pg_controldata/t/001_pg_controldata.pl | 21 ++++++++++++++++++++-
2 files changed, 38 insertions(+), 9 deletions(-)
