diff --git a/scripts/libs/check_dir_avail.sh b/scripts/libs/check_dir_avail.sh
index 0a2f3e45..3b2bccff 100644
--- a/scripts/libs/check_dir_avail.sh
+++ b/scripts/libs/check_dir_avail.sh
@@ -1,5 +1,5 @@
 #检查目录剩余空间——$1:目标路径 $2:-h参数
-dir_avail(){
+dir_avail() {
 	df -h >/dev/null 2>&1 && h="$2"
-	df $h "$1" |awk '{ for(i=1;i<=NF;i++){ if(NR==1){ arr[i]=$i; }else{ arr[i]=arr[i]" "$i; } } } END{ for(i=1;i<=NF;i++){ print arr[i]; } }' |grep -E 'Ava|可用' |awk '{print $2}'
+    df -P $2 "${1:-.}" 2>/dev/null | awk 'NR==2 {print $(NF-2)}'
 }
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