From 73a73be078f8d20401063a85ed5544ca6db98015 Mon Sep 17 00:00:00 2001
From: Iru Cai <mytbk920423@gmail.com>
Date: Mon, 29 Mar 2021 12:36:56 +0800
Subject: add iso_extract function based on bsdtar

---
 functions.sh | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/functions.sh b/functions.sh
index dba6d9d..a3b3a8d 100644
--- a/functions.sh
+++ b/functions.sh
@@ -135,6 +135,20 @@ umount_iso() {
 	udevil umount "$ISOMNT"
 }
 
+# iso_extract: extract files from iso image to destination path
+# usage: iso_extract <isofile> <patterns> <dest>
+iso_extract() {
+	local isofile="$1"
+	local patterns=()
+	shift
+	while [ "$#" -gt 1 ]; do
+		patterns+=("$1")
+		shift
+	done
+	local dest="$1"
+	bsdtar -x -f "$isofile" -C "$dest" "${patterns[@]}"
+}
+
 getuuid() {
 	lsblk -n -o UUID "$1"
 }
-- 
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