File/command access confirmation API in GraphicsMagick

Development GraphicsMagick now includes an interface whereby a using 
application can be notified about any file or execution access in 
advance and is able to deny that access via a return code.  This can 
be more reliable for controlling actions than attempting to validate 
input parameters.

Read about it at http://www.graphicsmagick.org/api/confirm_access.html

The above page does not document the enums.  This is the definition of 
ConfirmAccessMode:

   typedef enum
     {
       UndefinedConfirmAccessMode,
       FileExecuteConfirmAccessMode, /* Path is to be opened for execution */
       FileReadConfirmAccessMode,    /* Path is to be opened for read */
       FileWriteConfirmAccessMode,   /* Path is to be opened for write */
       URLGetFTPConfirmAccessMode,   /* ftp:// URL get */
       URLGetFileConfirmAccessMode,  /* file:// URL get */
       URLGetHTTPConfirmAccessMode   /* http:// URL get */
     } ConfirmAccessMode;

Any and all comments are appreciated before the interface is totally 
set in stone.

CVS HEAD and today's development snapshot include the initial 
implementation.

Bob
--
Bob Friesenhahn
[email protected], http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/

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