1 files changed, 33 insertions, 0 deletions
diff --git a/bin/edda.sh b/bin/edda.sh
new file mode 100644
index 00000000..b1d7b27a
--- /dev/null
+++ b/bin/edda.sh
@@ -0,0 +1,33 @@
+# Run ed(1) over multiple files, duplicating stdin.
+self=edda
+
+# Need at least one file
+if [ "$#" -eq 0 ] ; then
+    printf >&2 'edda: Need at least one file\n'
+    exit 2
+fi
+
+# Create a temporary directory with name in $td, and handle POSIX-ish traps to
+# remove it when the script exits.
+td=
+cleanup() {
+    [ -n "$td" ] && rm -fr -- "$td"
+    if [ "$1" != EXIT ] ; then
+        trap - "$1"
+        kill "-$1" "$$"
+    fi
+}
+for sig in EXIT HUP INT TERM ; do
+    # shellcheck disable=SC2064
+    trap "cleanup $sig" "$sig"
+done
+td=$(mktd "$self") || exit
+
+# Duplicate stdin into a file
+script=$td/script
+cat >"$script" || exit
+
+# Run ed(1) over each file with the stdin given
+for file ; do
+    ed -- "$file" <"$script"
+done