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+# $EPIC: ftruncate.txt,v 1.2 2006/10/06 19:08:28 jnelson Exp $
+======Synopsis:======
+$[[ftruncate]](//bytes// //filename//)
+======Technical:======
+The [[ftruncate]] file causes the //filename// to change to exactly //bytes//
+bytes in size.  The file is grown or shrunk as necessary.  If the file is
+shrunk, the data beyond the new file size is irretrievably lost.  If the file
+is grown, the contents of the new space is unspecified, but usually it is
+nuls (ascii 0).
+If the operation succeeds, the empty string is returned.  If the operation
+fails, an error string is returned, suitable for [[echo]]ing.
+======Practical:======
+This is useful for clearing a logfile that has gotten too big.
+======Returns:======
+The empty string on success, or an error string on failure.