src/routers/rf_expand_data.c

   1 /*************************************************
   2 *     Exim - an Internet mail transport agent    *
   3 *************************************************/
   4
   5 /* Copyright (c) University of Cambridge 1995 - 2009 */
   6 /* See the file NOTICE for conditions of use and distribution. */
   7
   8
   9 #include "../exim.h"
  10 #include "rf_functions.h"
  11
  12
  13 /*************************************************
  14 *       Expand data string and handle errors     *
  15 *************************************************/
  16
  17 /* This little function is used by a couple of routers for expanding things. It
  18 just saves repeating this code too many times. It does an expansion, and
  19 chooses a suitable return code on error.
  20
  21 Arguments:
  22   addr       the address that's being routed
  23   s          the string to be expanded
  24   prc        pointer to where to put the return code on failure
  25
  26 Returns:     the expanded string, or NULL (with prc set) on failure
  27 */
  28
  29 uschar *
  30 rf_expand_data(address_item *addr, uschar *s, int *prc)
  31 {
  32 uschar *yield = expand_string(s);
  33 if (yield != NULL) return yield;
  34 if (f.expand_string_forcedfail)
  35   {
  36   DEBUG(D_route) debug_printf("forced failure for expansion of \"%s\"\n", s);
  37   *prc = DECLINE;
  38   }
  39 else
  40   {
  41   addr->message = string_sprintf("failed to expand \"%s\": %s", s,
  42     expand_string_message);
  43   *prc = DEFER;
  44   }
  45 return NULL;
  46 }
  47
  48 /* End of routers/rf_expand_data.c */