From 540cd528321e59bdea28c064e705cb6428e953fe Mon Sep 17 00:00:00 2001
From: Phuong Vu <tariusagi@gmail.com>
Date: Fri, 25 Mar 2022 07:05:41 +0700
Subject: [PATCH] Fixed a bug when target size is larger or equal to current
 size.

---
 pishrink.sh | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/pishrink.sh b/pishrink.sh
index 1b4671b..0a7d278 100755
--- a/pishrink.sh
+++ b/pishrink.sh
@@ -363,8 +363,14 @@ if [[ $currentsize -eq $minsize ]]; then
 fi
 
 #Add some free space to the end of the filesystem
-minsize=$(($minsize + $extraspace * 1024**2 / $blocksize))
-logVariables $LINENO minsize
+targetsize=$(($minsize + $extraspace * 1024**2 / $blocksize))
+if [ $targetsize -ge $currentsize ]; then
+	info "Target size ($targetsize) too large, force to current size minus 1"
+	let minsize=$currentsize-1
+else
+	minsize=$targetsize
+fi
+logVariables $LINENO targetsize currentsize minsize
 
 #Shrink filesystem
 info "Shrinking filesystem"