#
 # The third form waits for a new sink-input to appear, and will record that.
 #
-# Copyright © 2020 martin f. krafft <madduck@madduck.net>
+# Copyright © 2020–2021 martin f. krafft <madduck@madduck.net>
 # Released under the teams of the Artistic Licence 2.0
 #
 set -eu
   }
 }
 
+uuidgen() {
+  hascmd() { command -v "$@" >/dev/null;}
+  if   hascmd uuid; then uuid
+  elif hascmd uuidgen; then uuidgen
+  elif hascmd python3; then
+    python3 -c 'import uuid; print(uuid.uuid1())'
+  elif hascmd python; then
+    python -c 'import uuid; print(uuid.uuid1())'
+  else
+    dd if=/dev/urandom bs=16 count=1 status=none | base64
+  fi
+}
+
+if [ -z "$outfile" ]; then
+  uuid=$(uuidgen)
+  outfile="${uuid}.ogg"
+fi
+
+if [ -f "$outfile" ] && [ $clobber -eq 0 ]; then
+  echo >&2 "E: file exists, and -f not given: $outfile"
+  exit 1
+fi
 case "$index" in
 
   (last)
   exit 1
 fi
 
-uuidgen() {
-  hascmd() { command -v "$@" >/dev/null;}
-  if   hascmd uuid; then uuid
-  elif hascmd uuidgen; then uuidgen
-  elif hascmd python3; then
-    python3 -c 'import uuid; print(uuid.uuid1())'
-  elif hascmd python; then
-    python -c 'import uuid; print(uuid.uuid1())'
-  else
-    dd if=/dev/urandom bs=16 count=1 status=none | base64
-  fi
-}
-
-uuid=$(uuidgen)
-
-[ -n "$outfile" ] || outfile="${uuid}.ogg"
-
-if [ -f "$outfile" ] && [ $clobber -eq 0 ]; then
-  echo >&2 "E: file exists, and -f not given: $outfile"
-  exit 1
-fi
-
-devname="record-to-file-${uuid}"
+devname="record-to-file-$(echo -n ${outfile%.*} | tr -c '[:alnum:]' '_')"
 
 echo >&2 "Recording source $index to $outfile …"