- uschar sep_o =
- Ustrncmp(name, "headers_add", 11) == 0 ? '\n'
- : Ustrncmp(name, "set", 3) == 0 ? ';'
- : ':';
- int sep_i = -(int)sep_o;
- const uschar * list = sptr;
- uschar * s;
- gstring * list_o = NULL;
-
- if (*str_target)
- {
- list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
- list_o = string_cat(list_o, *str_target);
- }
+ /* If this was a string, set the variable to point to the new string,
+ and set the flag so its store isn't reclaimed. If it was a list of rewrite
+ rules, we still keep the string (for printing), and parse the rules into a
+ control block and flags word. */
+
+ case opt_stringptr:
+ str_target = data_block ? USS (US data_block + ol->v.offset)
+ : USS ol->v.value;
+ if (ol->type & opt_rep_con)
+ {
+ uschar * saved_condition;
+ /* We already have a condition, we're conducting a crude hack to let
+ multiple condition rules be chained together, despite storing them in
+ text form. */
+ *str_target = string_copy_perm( (saved_condition = *str_target)
+ ? string_sprintf("${if and{{bool_lax{%s}}{bool_lax{%s}}}}",
+ saved_condition, sptr)
+ : sptr,
+ FALSE);
+ /* TODO(pdp): there is a memory leak here and just below
+ when we set 3 or more conditions; I still don't
+ understand the store mechanism enough to know
+ what's the safe way to free content from an earlier store.
+ AFAICT, stores stack, so freeing an early stored item also stores
+ all data alloc'd after it. If we knew conditions were adjacent,
+ we could survive that, but we don't. So I *think* we need to take
+ another bit from opt_type to indicate "malloced"; this seems like
+ quite a hack, especially for this one case. It also means that
+ we can't ever reclaim the store from the *first* condition.
+
+ Because we only do this once, near process start-up, I'm prepared to
+ let this slide for the time being, even though it rankles. */
+ }
+ else if (ol->type & opt_rep_str)
+ {
+ uschar sep_o =
+ Ustrncmp(name, "headers_add", 11) == 0 ? '\n'
+ : Ustrncmp(name, "set", 3) == 0 ? ';'
+ : ':';
+ int sep_i = -(int)sep_o;
+ const uschar * list = sptr;
+ uschar * s;
+ gstring * list_o = NULL;
+
+ if (*str_target)
+ {
+ list_o = string_get(Ustrlen(*str_target) + Ustrlen(sptr));
+ list_o = string_cat(list_o, *str_target);
+ }