From 0e5c2e1cff7cfe5dcaf893f9c8fa838c3cf22b8a Mon Sep 17 00:00:00 2001
From: Christoph Klaffl <christoph@phreaker.eu>
Date: Tue, 5 Nov 2019 17:19:56 +0100
Subject: [PATCH] improve dataset detection by only including mounted datasets

---
 findoid | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/findoid b/findoid
index 48301a4..67b5de6 100755
--- a/findoid
+++ b/findoid
@@ -102,14 +102,19 @@ sub getdataset {
 
 	my ($path) = @_;
 
-	open FH, "$zfs list -Ho mountpoint |";
+	open FH, "$zfs list -H -t filesystem -o mountpoint,mounted |";
 	my @datasets = <FH>;
 	close FH;
 
 	my @matchingdatasets;
 	foreach my $dataset (@datasets) {
 		chomp $dataset;
-		if ( $path =~ /^$dataset/ ) { push @matchingdatasets, $dataset; }
+		my ($mountpoint, $mounted) = ($dataset =~ m/([^\t]*)\t*(.*)/);
+		if ($mounted ne "yes") {
+			next;
+		}
+
+		if ( $path =~ /^$mountpoint/ ) { push @matchingdatasets, $mountpoint; }
 	}
 
 	my $bestmatch = '';