From 2750d3d22dc21afa8267086806a88790a3fab716 Mon Sep 17 00:00:00 2001
From: jacksonfoz <jacksonfoz@gmail.com>
Date: Fri, 6 Nov 2020 13:54:52 -0300
Subject: [PATCH] check_disk_space: handle relative log_directory path
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If the log_directory resolves to a relative path,
e.g. "../pg_log", the check_disk_space fails with an error like:

ERROR: Invalid result from command "/bin/df -kP "../pg_log" 2>&1": /bin/df: â: No such file or directory

This patch adds a verification to check if the logdir variable starts with a .[dot]
---
 check_postgres.pl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/check_postgres.pl b/check_postgres.pl
index edb47e1..f386437 100755
--- a/check_postgres.pl
+++ b/check_postgres.pl
@@ -5223,7 +5223,7 @@ sub check_disk_space {
 
         ## Check log_directory: relative or absolute
         if (length $logdir) {
-            if ($logdir =~ /^\w/) { ## relative, check only if symlinked
+            if ($logdir =~ /^[\w\.]/) { ## relative, check only if symlinked
                 $logdir = "$datadir/$logdir";
                 if (-l $logdir) {
                     my $linkdir = readlink($logdir);