add directory Ref-docs

Ref-docs/manual Bash/abs-guide/abs-guide/ex52.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+
+lines=35        # Allow 35 lines for the header (very generous).
+
+for File in *   # Test all the files in the current working directory...
+do
+  search1=`head -$lines $File | grep begin | wc -w`
+  search2=`tail -$lines $File | grep end | wc -w`
+  #  Uuencoded files have a "begin" near the beginning,
+  #+ and an "end" near the end.
+  if [ "$search1" -gt 0 ]
+  then
+    if [ "$search2" -gt 0 ]
+    then
+      echo "uudecoding - $File -"
+      uudecode $File
+    fi  
+  fi
+done  
+
+#  Note that running this script upon itself fools it
+#+ into thinking it is a uuencoded file,
+#+ because it contains both "begin" and "end".
+
+# Exercise:
+# Modify this script to check for a newsgroup header.
+
+exit 0