+/* These values are usually fixed boolean values, but they are permitted to be
+expanded strings.
+
+Arguments:
+ addr address being routed
+ mtype the module type
+ mname the module name
+ dbg_opt debug selectors
+ oname the option name
+ bvalue the router's boolean value
+ svalue the router's string value
+ rvalue where to put the returned value
+
+Returns: OK value placed in rvalue
+ DEFER expansion failed
+*/
+
+int
+exp_bool(address_item *addr,
+ uschar *mtype, uschar *mname, unsigned dbg_opt,
+ uschar *oname, BOOL bvalue,
+ uschar *svalue, BOOL *rvalue)
+{
+uschar *expanded;
+if (!svalue) { *rvalue = bvalue; return OK; }
+
+if (!(expanded = expand_string(svalue)))
+ {
+ if (f.expand_string_forcedfail)
+ {
+ DEBUG(dbg_opt) debug_printf("expansion of \"%s\" forced failure\n", oname);
+ *rvalue = bvalue;
+ return OK;
+ }
+ addr->message = string_sprintf("failed to expand \"%s\" in %s %s: %s",
+ oname, mname, mtype, expand_string_message);
+ DEBUG(dbg_opt) debug_printf("%s\n", addr->message);
+ return DEFER;
+ }
+
+DEBUG(dbg_opt) debug_printf("expansion of \"%s\" yields \"%s\"\n", oname,
+ expanded);
+
+if (strcmpic(expanded, US"true") == 0 || strcmpic(expanded, US"yes") == 0)
+ *rvalue = TRUE;
+else if (strcmpic(expanded, US"false") == 0 || strcmpic(expanded, US"no") == 0)
+ *rvalue = FALSE;
+else
+ {
+ addr->message = string_sprintf("\"%s\" is not a valid value for the "
+ "\"%s\" option in the %s %s", expanded, oname, mname, mtype);
+ return DEFER;
+ }
+
+return OK;
+}
+
+
+
+/* Avoid potentially exposing a password in a string about to be logged */
+
+uschar *
+expand_hide_passwords(uschar * s)
+{
+return ( ( Ustrstr(s, "failed to expand") != NULL
+ || Ustrstr(s, "expansion of ") != NULL
+ )
+ && ( Ustrstr(s, "mysql") != NULL
+ || Ustrstr(s, "pgsql") != NULL
+ || Ustrstr(s, "redis") != NULL
+ || Ustrstr(s, "sqlite") != NULL
+ || Ustrstr(s, "ldap:") != NULL
+ || Ustrstr(s, "ldaps:") != NULL
+ || Ustrstr(s, "ldapi:") != NULL
+ || Ustrstr(s, "ldapdn:") != NULL
+ || Ustrstr(s, "ldapm:") != NULL
+ ) )
+ ? US"Temporary internal error" : s;
+}
+
+
+/* Read given named file into big_buffer. Use for keying material etc.
+The content will have an ascii NUL appended.
+
+Arguments:
+ filename as it says
+
+Return: pointer to buffer, or NULL on error.
+*/
+
+uschar *
+expand_file_big_buffer(const uschar * filename)
+{
+int fd, off = 0, len;
+
+if ((fd = open(CS filename, O_RDONLY)) < 0)
+ {
+ log_write(0, LOG_MAIN | LOG_PANIC, "unable to open file for reading: %s",
+ filename);
+ return NULL;
+ }
+
+do
+ {
+ if ((len = read(fd, big_buffer + off, big_buffer_size - 2 - off)) < 0)
+ {
+ (void) close(fd);
+ log_write(0, LOG_MAIN|LOG_PANIC, "unable to read file: %s", filename);
+ return NULL;
+ }
+ off += len;
+ }
+while (len > 0);
+
+(void) close(fd);
+big_buffer[off] = '\0';
+return big_buffer;
+}
+
+
+
+/*************************************************
+* Error-checking for testsuite *
+*************************************************/
+typedef struct {
+ uschar * region_start;
+ uschar * region_end;
+ const uschar *var_name;
+ const uschar *var_data;
+} err_ctx;
+
+static void
+assert_variable_notin(uschar * var_name, uschar * var_data, void * ctx)
+{
+err_ctx * e = ctx;
+if (var_data >= e->region_start && var_data < e->region_end)
+ {
+ e->var_name = CUS var_name;
+ e->var_data = CUS var_data;
+ }
+}
+
+void
+assert_no_variables(void * ptr, int len, const char * filename, int linenumber)
+{
+err_ctx e = { .region_start = ptr, .region_end = US ptr + len,
+ .var_name = NULL, .var_data = NULL };
+
+/* check acl_ variables */
+tree_walk(acl_var_c, assert_variable_notin, &e);
+tree_walk(acl_var_m, assert_variable_notin, &e);
+
+/* check auth<n> variables */
+for (int i = 0; i < AUTH_VARS; i++) if (auth_vars[i])
+ assert_variable_notin(US"auth<n>", auth_vars[i], &e);
+
+/* check regex<n> variables */
+for (int i = 0; i < REGEX_VARS; i++) if (regex_vars[i])
+ assert_variable_notin(US"regex<n>", regex_vars[i], &e);
+
+/* check known-name variables */
+for (var_entry * v = var_table; v < var_table + var_table_size; v++)
+ if (v->type == vtype_stringptr)
+ assert_variable_notin(US v->name, *(USS v->value), &e);
+
+/* check dns and address trees */
+tree_walk(tree_dns_fails, assert_variable_notin, &e);
+tree_walk(tree_duplicates, assert_variable_notin, &e);
+tree_walk(tree_nonrecipients, assert_variable_notin, &e);
+tree_walk(tree_unusable, assert_variable_notin, &e);
+
+if (e.var_name)
+ log_write(0, LOG_MAIN|LOG_PANIC_DIE,
+ "live variable '%s' destroyed by reset_store at %s:%d\n- value '%.64s'",
+ e.var_name, filename, linenumber, e.var_data);
+}
+
+
+
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