X-Git-Url: https://git.distorted.org.uk/~mdw/misc/blobdiff_plain/412abc9e49c747cb032b099e7a6a6e4622682891..8b628e9f2ad95491f8a5f5354fc4101c07b80514:/buf

diff --git a/buf b/buf
index c95cf89..1bb1958 100755
--- a/buf
+++ b/buf
@@ -1,18 +1,27 @@
 #! /bin/sh
 
 set -e
-case "$#:$1" in
-  0:* | 1:-h | 1:--help)
-    echo "Usage: $0 PROG ARGS..."
-    echo "  Buffer stdin to temp file and pass to PROG with ARGS"
-    exit 0
-    ;;
-esac
+ext=""
+while :; do
+  case "$#:$1" in
+    0:* | *:-h | *:--help)
+      echo "Usage: $0 [-e EXT] PROG ARGS..."
+      echo "  Buffer stdin to temp file and pass to PROG with ARGS"
+      exit 0
+      ;;
+    1:-e) echo >&2 "$0: missing argument"; exit 1 ;;
+    *:-e) ext=$2; shift 2 ;;
+    *:-e*) ext=${1#-e}; shift ;;
+    *:--) shift; break ;;
+    *:-*) echo >&2 "$0: unknown option \`$1'"; exit 1 ;;
+    *) break ;;
+  esac
+done
 tmp=${TMPDIR-/tmp}/buf-$$
 mkdir "$tmp"
 trap 'rm -rf "$tmp"' INT QUIT TERM HUP EXIT
-cat >"$tmp/buf"
-set +e; "$@" "$tmp/buf"; st=$?; set -e
+cat >"$tmp/buf$ext"
+set +e; "$@" "$tmp/buf$ext"; st=$?; set -e
 trap '' INT QUIT TERM HUP EXIT
 rm -rf "$tmp"
 exit $st