Wildcard "?" does not work correctly in vsftpd

Issue

• The wildcard "?" does not work correctly after updating vsftpd-2.0.5-24.el5.

• The wildcard functions properly as follows before updating:

  ftp> ls
  -rw-rw-r--    1 500      500            24 Mar 02 04:01 aaa.txt
  -rw-rw-r--    1 500      500             0 Mar 02 03:59 bbb.txt
  -rw-rw-r--    1 500      500             0 Mar 02 03:59 ccc.txt
  :
  ftp> ls aaa.tx?
  -rw-rw-r--    1 500      500            24 Mar 02 04:01 aaa.txt
  :
  ftp> ls aaa.t?t
  -rw-rw-r--    1 500      500            24 Mar 02 04:01 aaa.txt
  :
  ftp> ls aaa.?xt
  -rw-rw-r--    1 500      500            24 Mar 02 04:01 aaa.txt
  :
  

  After updating, when we use the wildcard "?" at the end of words, it works correctly. However, if "?" is put at other than the end, it doesn't work as expected.

  ftp> ls aaa.tx?      
  -rw-rw-r--    1 500      500            24 Mar 02 04:01 aaa.txt
  :
  ftp> ls aaa.t?t
  227 Entering Passive Mode (127,0,0,1,232,236)
  150 Here comes the directory listing.
  226 Directory send OK.
  ftp> ls aaa.?xt
  227 Entering Passive Mode (127,0,0,1,89,155)
  150 Here comes the directory listing.
  226 Directory send OK.