From 8c69566da66e9239bbcd84b10e60068ade6c1784 Mon Sep 17 00:00:00 2001
From: Scot Breitenfeld <brtnfld@hdfgroup.org>
Date: Thu, 19 Oct 2023 10:58:20 -0500
Subject: provide an alternative to mapfile for older bash (#3717)

---
 utils/subfiling_vfd/h5fuse.sh.in | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/utils/subfiling_vfd/h5fuse.sh.in b/utils/subfiling_vfd/h5fuse.sh.in
index 82d497e..6f4bf61 100755
--- a/utils/subfiling_vfd/h5fuse.sh.in
+++ b/utils/subfiling_vfd/h5fuse.sh.in
@@ -243,9 +243,15 @@ if test -z "$subfile_dir"; then
     exit $FAILED
 fi
 
-# For bash 4.4+
 subfs=$(sed -e '1,/subfile_dir=/d' "$file_config")
-mapfile -t subfiles <<< "$subfs"
+if command -v mapfile > /dev/null; then
+    # For bash 4.4+
+    mapfile -t subfiles <<< "$subfs"
+else
+    while IFS= read -r line; do
+         subfiles+=("$line")
+    done <<< "$subfs"
+fi
 if [ ${#subfiles[@]} -eq 0 ]; then
     echo -e "$RED failed to find subfiles list in $file_config $NC"
     exit $FAILED
-- 
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