constify

[users/heiko/exim.git] / src / src / lookups / mysql.c

diff --git a/src/src/lookups/mysql.c b/src/src/lookups/mysql.c
index 19abdeb60a3ca234fa9b78cfed3aab86b5de3e3a..745c6505cad97217e9e3fb9cf3ccc3f920f74545 100644 (file)
--- a/src/src/lookups/mysql.c
+++ b/src/src/lookups/mysql.c
@@ -2,7 +2,7 @@
 *     Exim - an Internet mail transport agent    *
 *************************************************/
 
-/* Copyright (c) University of Cambridge 1995 - 2015 */
+/* Copyright (c) University of Cambridge 1995 - 2018 */
 /* See the file NOTICE for conditions of use and distribution. */
 
 /* Thanks to Paul Kelly for contributing the original code for these
@@ -81,7 +81,7 @@ static mysql_connection *mysql_connections = NULL;
 /* See local README for interface description. */
 
 static void *
-mysql_open(uschar *filename, uschar **errmsg)
+mysql_open(const uschar * filename, uschar ** errmsg)
 {
 return (void *)(1);    /* Just return something non-null */
 }
@@ -101,7 +101,7 @@ mysql_connection *cn;
 while ((cn = mysql_connections) != NULL)
   {
   mysql_connections = cn->next;
-  DEBUG(D_lookup) debug_printf("close MYSQL connection: %s\n", cn->server);
+  DEBUG(D_lookup) debug_printf_indent("close MYSQL connection: %s\n", cn->server);
   mysql_close(cn->handle);
   }
 }
@@ -152,7 +152,7 @@ database, user, password. We can write to the string, since it is in a
 nextinlist temporary buffer. The copy of the string that is used for caching
 has the password removed. This copy is also used for debugging output. */
 
-for (i = 3; i > 0; i--)
+for (int i = 3; i > 0; i--)
   {
   uschar *pp = Ustrrchr(server, '/');
   if (pp == NULL)
@@ -227,12 +227,12 @@ if (!cn)
   if (sdata[1][0] == 0) sdata[1] = NULL;
 
   DEBUG(D_lookup)
-    debug_printf("MYSQL new connection: host=%s port=%d socket=%s "
+    debug_printf_indent("MYSQL new connection: host=%s port=%d socket=%s "
       "database=%s user=%s\n", sdata[0], port, socket, sdata[1], sdata[2]);
 
   /* Get store for a new handle, initialize it, and connect to the server */
 
-  mysql_handle = store_get(sizeof(MYSQL));
+  mysql_handle = store_get(sizeof(MYSQL), FALSE);
   mysql_init(mysql_handle);
   mysql_options(mysql_handle, MYSQL_READ_DEFAULT_GROUP, CS group);
   if (mysql_real_connect(mysql_handle,
@@ -248,7 +248,7 @@ if (!cn)
 
   /* Add the connection to the cache */
 
-  cn = store_get(sizeof(mysql_connection));
+  cn = store_get(sizeof(mysql_connection), FALSE);
   cn->server = server_copy;
   cn->handle = mysql_handle;
   cn->next = mysql_connections;
@@ -260,7 +260,7 @@ if (!cn)
 else
   {
   DEBUG(D_lookup)
-    debug_printf("MYSQL using cached connection for %s\n", server_copy);
+    debug_printf_indent("MYSQL using cached connection for %s\n", server_copy);
   }
 
 /* Run the query */
@@ -281,11 +281,11 @@ we return the number of rows affected by the command. In this event, we do NOT
 want to cache the result; also the whole cache for the handle must be cleaned
 up. Setting do_cache zero requests this. */
 
-if ((mysql_result = mysql_use_result(mysql_handle)) == NULL)
+if (!(mysql_result = mysql_use_result(mysql_handle)))
   {
   if ( mysql_field_count(mysql_handle) == 0 )
     {
-    DEBUG(D_lookup) debug_printf("MYSQL: query was not one that returns data\n");
+    DEBUG(D_lookup) debug_printf_indent("MYSQL: query was not one that returns data\n");
     result = string_cat(result,
               string_sprintf("%d", mysql_affected_rows(mysql_handle)));
     *do_cache = 0;
@@ -314,34 +314,32 @@ while ((mysql_row_data = mysql_fetch_row(mysql_result)))
   if (result)
     result = string_catn(result, US"\n", 1);
 
-  if (num_fields == 1)
-    {
-    if (mysql_row_data[0] != NULL)    /* NULL value yields nothing */
-      {
-      result = string_catn(result, US mysql_row_data[0],
-        lengths[0]);
-      (void) string_from_gstring(result);
-      }
-    }
+  if (num_fields != 1)
+    for (int i = 0; i < num_fields; i++)
+      result = lf_quote(US fields[i].name, US mysql_row_data[i], lengths[i],
+                       result);
 
-  else for (i = 0; i < num_fields; i++)
-    result = lf_quote(US fields[i].name, US mysql_row_data[i], lengths[i], result);
+  else if (mysql_row_data[0] != NULL)    /* NULL value yields nothing */
+      result = string_catn(result, US mysql_row_data[0], lengths[0]);
   }
 
 /* more results? -1 = no, >0 = error, 0 = yes (keep looping)
    This is needed because of the CLIENT_MULTI_RESULTS on mysql_real_connect(),
    we don't expect any more results. */
 
-while((i = mysql_next_result(mysql_handle)) >= 0) {
-   if(i == 0) {   /* Just ignore more results */
-     DEBUG(D_lookup) debug_printf("MYSQL: got unexpected more results\n");
-     continue;
-   }
+while((i = mysql_next_result(mysql_handle)) >= 0)
+  {
+  if(i == 0)   /* Just ignore more results */
+    {
+    DEBUG(D_lookup) debug_printf_indent("MYSQL: got unexpected more results\n");
+    continue;
+    }
 
-   *errmsg = string_sprintf("MYSQL: lookup result error when checking for more results: %s\n",
-       mysql_error(mysql_handle));
-   goto MYSQL_EXIT;
-}
+  *errmsg = string_sprintf(
+       "MYSQL: lookup result error when checking for more results: %s\n",
+       mysql_error(mysql_handle));
+  goto MYSQL_EXIT;
+  }
 
 /* If result is NULL then no data has been found and so we return FAIL.
 Otherwise, we must terminate the string which has been built; string_cat()
@@ -352,11 +350,6 @@ if (!result)
   yield = FAIL;
   *errmsg = US"MYSQL: no data found";
   }
-else
-  {
-  (void) string_from_gstring(result);
-  store_reset(result->s + result->ptr + 1);
-  }
 
 /* Get here by goto from various error checks and from the case where no data
 was read (e.g. an update query). */
@@ -372,12 +365,13 @@ if (mysql_result) mysql_free_result(mysql_result);
 
 if (result)
   {
-  *resultptr = result->s;
+  *resultptr = string_from_gstring(result);
+  gstring_release_unused(result);
   return OK;
   }
 else
   {
-  DEBUG(D_lookup) debug_printf("%s\n", *errmsg);
+  DEBUG(D_lookup) debug_printf_indent("%s\n", *errmsg);
   return yield;      /* FAIL or DEFER */
   }
 }
@@ -395,8 +389,8 @@ query is deferred with a retryable error is now in a separate function that is
 shared with other SQL lookups. */
 
 static int
-mysql_find(void *handle, uschar *filename, const uschar *query, int length,
-  uschar **result, uschar **errmsg, uint *do_cache)
+mysql_find(void * handle, const uschar * filename, const uschar * query,
+  int length, uschar ** result, uschar ** errmsg, uint * do_cache)
 {
 return lf_sqlperform(US"MySQL", US"mysql_servers", mysql_servers, query,
   result, errmsg, do_cache, perform_mysql_search);
@@ -438,7 +432,7 @@ while ((c = *t++) != 0)
   if (Ustrchr("\n\t\r\b\'\"\\", c) != NULL) count++;
 
 if (count == 0) return s;
-t = quoted = store_get(Ustrlen(s) + count + 1);
+t = quoted = store_get(Ustrlen(s) + count + 1, is_tainted(s));
 
 while ((c = *s++) != 0)
   {