Change tsearch2 to not use the unsafe practice of creating functions

that return INTERNAL without also having INTERNAL arguments.  Since the
functions in question aren't meant to be called by hand anyway, I just
redeclared them to take 'internal' instead of 'text'.  Also add code
to ProcedureCreate() to enforce the restriction, as I should have done
to start with :-(

diff --git a/contrib/tsearch2/gendict/sql.IN b/contrib/tsearch2/gendict/sql.IN
index ff0d8423999f4810d69816baa9225daee7345fb2..044230b4173f8689953450454512cee85d3a251d 100644 (file)
--- a/contrib/tsearch2/gendict/sql.IN
+++ b/contrib/tsearch2/gendict/sql.IN
@@ -1,7 +1,7 @@
 SET search_path = public;
 BEGIN;
 
-HASINIT create function dinit_CFG_MODNAME(text)
+HASINIT create function dinit_CFG_MODNAME(internal)
 HASINIT         returns internal
 HASINIT         as 'MODULE_PATHNAME'
 HASINIT         language 'C';

diff --git a/contrib/tsearch2/tsearch.sql.in b/contrib/tsearch2/tsearch.sql.in
index 35f96cd5cdb625243c3172c018772bf4b3538f3e..b51b049b9a865457311926431f3ff316ceef507f 100644 (file)
--- a/contrib/tsearch2/tsearch.sql.in
+++ b/contrib/tsearch2/tsearch.sql.in
@@ -44,7 +44,7 @@ CREATE FUNCTION set_curdict(text)
        with (isstrict);
 
 --built-in dictionaries
-CREATE FUNCTION dex_init(text)
+CREATE FUNCTION dex_init(internal)
        returns internal
        as 'MODULE_PATHNAME' 
        language 'C';
@@ -57,13 +57,13 @@ CREATE FUNCTION dex_lexize(internal,internal,int4)
 
 insert into pg_ts_dict select 
        'simple', 
-       'dex_init(text)',
+       'dex_init(internal)',
        null,
        'dex_lexize(internal,internal,int4)',
        'Simple example of dictionary.'
 ;
         
-CREATE FUNCTION snb_en_init(text)
+CREATE FUNCTION snb_en_init(internal)
        returns internal
        as 'MODULE_PATHNAME' 
        language 'C';
@@ -76,26 +76,26 @@ CREATE FUNCTION snb_lexize(internal,internal,int4)
 
 insert into pg_ts_dict select 
        'en_stem', 
-       'snb_en_init(text)',
+       'snb_en_init(internal)',
        'contrib/english.stop',
        'snb_lexize(internal,internal,int4)',
        'English Stemmer. Snowball.'
 ;
 
-CREATE FUNCTION snb_ru_init(text)
+CREATE FUNCTION snb_ru_init(internal)
        returns internal
        as 'MODULE_PATHNAME' 
        language 'C';
 
 insert into pg_ts_dict select 
        'ru_stem', 
-       'snb_ru_init(text)',
+       'snb_ru_init(internal)',
        'contrib/russian.stop',
        'snb_lexize(internal,internal,int4)',
        'Russian Stemmer. Snowball.'
 ;
         
-CREATE FUNCTION spell_init(text)
+CREATE FUNCTION spell_init(internal)
        returns internal
        as 'MODULE_PATHNAME' 
        language 'C';
@@ -108,13 +108,13 @@ CREATE FUNCTION spell_lexize(internal,internal,int4)
 
 insert into pg_ts_dict select 
        'ispell_template', 
-       'spell_init(text)',
+       'spell_init(internal)',
        null,
        'spell_lexize(internal,internal,int4)',
        'ISpell interface. Must have .dict and .aff files'
 ;
 
-CREATE FUNCTION syn_init(text)
+CREATE FUNCTION syn_init(internal)
        returns internal
        as 'MODULE_PATHNAME' 
        language 'C';
@@ -127,7 +127,7 @@ CREATE FUNCTION syn_lexize(internal,internal,int4)
 
 insert into pg_ts_dict select 
        'synonym', 
-       'syn_init(text)',
+       'syn_init(internal)',
        null,
        'syn_lexize(internal,internal,int4)',
        'Example of synonym dictionary'

diff --git a/contrib/tsearch2/untsearch.sql.in b/contrib/tsearch2/untsearch.sql.in
index b1883d5fbdf083ced54b93bab60659d7c0b95890..2a658dfd933caac5e5d74f0329918c9db8d7fea1 100644 (file)
--- a/contrib/tsearch2/untsearch.sql.in
+++ b/contrib/tsearch2/untsearch.sql.in
@@ -34,14 +34,14 @@ DROP FUNCTION lexize(text, text);
 DROP FUNCTION lexize(text);
 DROP FUNCTION set_curdict(int);
 DROP FUNCTION set_curdict(text);
-DROP FUNCTION dex_init(text);
+DROP FUNCTION dex_init(internal);
 DROP FUNCTION dex_lexize(internal,internal,int4);
-DROP FUNCTION snb_en_init(text);
+DROP FUNCTION snb_en_init(internal);
 DROP FUNCTION snb_lexize(internal,internal,int4);
-DROP FUNCTION snb_ru_init(text);
-DROP FUNCTION spell_init(text);
+DROP FUNCTION snb_ru_init(internal);
+DROP FUNCTION spell_init(internal);
 DROP FUNCTION spell_lexize(internal,internal,int4);
-DROP FUNCTION syn_init(text);
+DROP FUNCTION syn_init(internal);
 DROP FUNCTION syn_lexize(internal,internal,int4);
 DROP FUNCTION set_curprs(int);
 DROP FUNCTION set_curprs(text);

diff --git a/src/backend/catalog/pg_proc.c b/src/backend/catalog/pg_proc.c
index 1f8b3388db21f8f3fdf47a7aeccd08d0bcb41f69..12f6c64634f0e874a00e3d17f34939c99e146a6e 100644 (file)
--- a/src/backend/catalog/pg_proc.c
+++ b/src/backend/catalog/pg_proc.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *       $PostgreSQL: pgsql/src/backend/catalog/pg_proc.c,v 1.128 2005/04/14 20:03:23 tgl Exp $
+ *       $PostgreSQL: pgsql/src/backend/catalog/pg_proc.c,v 1.129 2005/05/03 16:51:00 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -81,6 +81,9 @@ ProcedureCreate(const char *procedureName,
        int                     allParamCount;
        Oid                *allParams;
        bool            genericInParam = false;
+       bool            genericOutParam = false;
+       bool            internalInParam = false;
+       bool            internalOutParam = false;
        Relation        rel;
        HeapTuple       tup;
        HeapTuple       oldtup;
@@ -133,43 +136,59 @@ ProcedureCreate(const char *procedureName,
 
        /*
         * Do not allow return type ANYARRAY or ANYELEMENT unless at least one
-        * input argument is also ANYARRAY or ANYELEMENT
+        * input argument is ANYARRAY or ANYELEMENT.  Also, do not allow
+        * return type INTERNAL unless at least one input argument is INTERNAL.
         */
        for (i = 0; i < parameterCount; i++)
        {
-               if (parameterTypes->values[i] == ANYARRAYOID ||
-                       parameterTypes->values[i] == ANYELEMENTOID)
+               switch (parameterTypes->values[i])
                {
-                       genericInParam = true;
-                       break;
+                       case ANYARRAYOID:
+                       case ANYELEMENTOID:
+                               genericInParam = true;
+                               break;
+                       case INTERNALOID:
+                               internalInParam = true;
+                               break;
                }
        }
 
-       if (!genericInParam)
+       if (allParameterTypes != PointerGetDatum(NULL))
        {
-               bool    genericOutParam = false;
-
-               if (allParameterTypes != PointerGetDatum(NULL))
+               for (i = 0; i < allParamCount; i++)
                {
-                       for (i = 0; i < allParamCount; i++)
+                       /*
+                        * We don't bother to distinguish input and output params here,
+                        * so if there is, say, just an input INTERNAL param then we will
+                        * still set internalOutParam.  This is OK since we don't really
+                        * care.
+                        */
+                       switch (allParams[i])
                        {
-                               if (allParams[i] == ANYARRAYOID ||
-                                       allParams[i] == ANYELEMENTOID)
-                               {
+                               case ANYARRAYOID:
+                               case ANYELEMENTOID:
                                        genericOutParam = true;
                                        break;
-                               }
+                               case INTERNALOID:
+                                       internalOutParam = true;
+                                       break;
                        }
                }
-
-               if (returnType == ANYARRAYOID || returnType == ANYELEMENTOID ||
-                       genericOutParam)
-                       ereport(ERROR,
-                                       (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
-                                        errmsg("cannot determine result data type"),
-                                        errdetail("A function returning \"anyarray\" or \"anyelement\" must have at least one argument of either type.")));
        }
 
+       if ((returnType == ANYARRAYOID || returnType == ANYELEMENTOID ||
+                genericOutParam) && !genericInParam)
+               ereport(ERROR,
+                               (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
+                                errmsg("cannot determine result data type"),
+                                errdetail("A function returning \"anyarray\" or \"anyelement\" must have at least one argument of either type.")));
+
+       if ((returnType == INTERNALOID || internalOutParam) && !internalInParam)
+               ereport(ERROR,
+                               (errcode(ERRCODE_INVALID_FUNCTION_DEFINITION),
+                                errmsg("unsafe use of INTERNAL pseudo-type"),
+                                errdetail("A function returning \"internal\" must have at least one \"internal\" argument.")));
+
        /*
         * don't allow functions of complex types that have the same name as
         * existing attributes of the type