From 74d8c95b7456faefdd4244acf854361711fb42ce Mon Sep 17 00:00:00 2001
From: Fujii Masao <fujii@postgresql.org>
Date: Mon, 1 Aug 2016 17:36:14 +0900
Subject: [PATCH] Fix pg_basebackup so that it accepts 0 as a valid compression
level.
The help message for pg_basebackup specifies that the numbers 0 through 9
are accepted as valid values of -Z option. But, previously -Z 0 was rejected
as an invalid compression level.
Per discussion, it's better to make pg_basebackup treat 0 as valid
compression level meaning no compression, like pg_dump.
Back-patch to all supported versions.
Reported-By: Jeff Janes
Reviewed-By: Amit Kapila
Discussion: CAMkU=1x+GwjSayc57v6w87ij6iRGFWt=hVfM0B64b1_bPVKRqg@mail.gmail.com
---
doc/src/sgml/ref/pg_basebackup.sgml | 2 +-
src/bin/pg_basebackup/pg_basebackup.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/doc/src/sgml/ref/pg_basebackup.sgml b/doc/src/sgml/ref/pg_basebackup.sgml
index 4d679d0a059..03615da480c 100644
--- a/doc/src/sgml/ref/pg_basebackup.sgml
+++ b/doc/src/sgml/ref/pg_basebackup.sgml
@@ -364,7 +364,7 @@ PostgreSQL documentation
<listitem>
<para>
Enables gzip compression of tar file output, and specifies the
- compression level (1 through 9, 9 being best
+ compression level (0 through 9, 0 being no compression and 9 being best
compression). Compression is only available when using the tar
format.
</para>
diff --git a/src/bin/pg_basebackup/pg_basebackup.c b/src/bin/pg_basebackup/pg_basebackup.c
index ec69682d208..ed41db8e6e6 100644
--- a/src/bin/pg_basebackup/pg_basebackup.c
+++ b/src/bin/pg_basebackup/pg_basebackup.c
@@ -2073,7 +2073,7 @@ main(int argc, char **argv)
break;
case 'Z':
compresslevel = atoi(optarg);
- if (compresslevel <= 0 || compresslevel > 9)
+ if (compresslevel < 0 || compresslevel > 9)
{
fprintf(stderr, _("%s: invalid compression level \"%s\"\n"),
progname, optarg);
--
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