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+# Date: Fri, 11 Oct 91 11:22:36 edt
+# From: friedman@gnu.ai.mit.edu
+# To: bfox@gnu.ai.mit.edu
+
+# A replacement for dirname(1).  This one appears less often on some
+# systems I use than basename(1), and I really depend on it for some
+# things.  Usage: dirname [path]
+function dirname ()
+{
+ local dir="$1"
+ local tdir="${dir%/}"
+
+    # Strip trailing '/' characters from dir (unusual that this should
+    # ever occur, but dirname(1) seems to deal with it.)
+    while [ "${tdir}" != "${dir}" ]; do
+       tdir="${dir}"
+       dir="${tdir%/}"
+    done
+
+    echo "${dir%/*}"
+}