*
*
* IDENTIFICATION
- * $Header: /cvsroot/pgsql/src/backend/utils/adt/acl.c,v 1.62 2001/06/12 15:58:34 momjian Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/acl.c,v 1.63 2001/06/12 16:34:26 momjian Exp $
*
*-------------------------------------------------------------------------
*/
static bool aclitemeq(const AclItem *a1, const AclItem *a2);
static bool aclitemgt(const AclItem *a1, const AclItem *a2);
-AclMode convert_priv_string(text *priv_type_text);
-bool has_table_privilege_cname_cname(char *username, char *relname, text *priv_type_text);
-bool has_table_privilege_id_cname(Oid usesysid, char *relname, text *priv_type_text);
-bool has_table_privilege_cname_id(char *username, Oid reloid, text *priv_type_text);
-static char *get_Name(text *relin);
-
#define ACL_IDTYPE_GID_KEYWORD "group"
#define ACL_IDTYPE_UID_KEYWORD "user"
pfree(str.data);
return ret;
}
-
-
-/*
- * has_table_privilege_tname_tname
- * Check user privileges on a relation given
- * text usename, text relname, and text priv name.
- *
- * RETURNS
- * a boolean value
- * 't' indicating user has the privilege
- * 'f' indicating user does not have the privilege
- */
-Datum
-has_table_privilege_tname_tname(PG_FUNCTION_ARGS)
-{
- text *username_text;
- char *username;
- text *relname_text;
- char *relname;
- text *priv_type_text;
- bool result;
-
- username_text = PG_GETARG_TEXT_P(0);
- relname_text = PG_GETARG_TEXT_P(1);
- priv_type_text = PG_GETARG_TEXT_P(2);
-
- /*
- * Convert username and relname 'text' pattern to null-terminated string
- */
- username = get_Name(username_text);
- relname = get_Name(relname_text);
-
- /*
- * Make use of has_table_privilege_cname_cname.
- * It accepts the arguments we now have.
- */
- result = has_table_privilege_cname_cname(username, relname, priv_type_text);
-
- PG_RETURN_BOOL(result);
-
-}
-
-
-/*
- * has_table_privilege_tname_name
- * Check user privileges on a relation given
- * text usename, name relname, and text priv name.
- *
- * RETURNS
- * a boolean value
- * 't' indicating user has the privilege
- * 'f' indicating user does not have the privilege
- */
-Datum
-has_table_privilege_tname_name(PG_FUNCTION_ARGS)
-{
- text *username_text;
- char *username;
- Name relname_name;
- char *relname;
- text *priv_type_text;
- bool result;
-
- username_text = PG_GETARG_TEXT_P(0);
- relname_name = PG_GETARG_NAME(1);
- priv_type_text = PG_GETARG_TEXT_P(2);
-
- /*
- * Convert username 'text' pattern to null-terminated string
- */
- username = get_Name(username_text);
-
- /*
- * Convert relname 'name' pattern to null-terminated string
- */
- relname = DatumGetCString(DirectFunctionCall1(nameout, PointerGetDatum(relname_name)));
-
- /*
- * Make use of has_table_privilege_cname_cname.
- * It accepts the arguments we now have.
- */
- result = has_table_privilege_cname_cname(username, relname, priv_type_text);
-
- PG_RETURN_BOOL(result);
-
-}
-
-
-/*
- * has_table_privilege_name_tname
- * Check user privileges on a relation given
- * name usename, text relname, and text priv name.
- *
- * RETURNS
- * a boolean value
- * 't' indicating user has the privilege
- * 'f' indicating user does not have the privilege
- */
-Datum
-has_table_privilege_name_tname(PG_FUNCTION_ARGS)
-{
- Name username_name;
- char *username;
- text *relname_text;
- char *relname;
- text *priv_type_text;
- bool result;
-
- username_name = PG_GETARG_NAME(0);
- relname_text = PG_GETARG_TEXT_P(1);
- priv_type_text = PG_GETARG_TEXT_P(2);
-
- /*
- * Convert username 'name' pattern to null-terminated string
- */
- username = DatumGetCString(DirectFunctionCall1(nameout, PointerGetDatum(username_name)));
-
- /*
- * Convert relname 'text' pattern to null-terminated string
- */
- relname = get_Name(relname_text);
-
- /*
- * Make use of has_table_privilege_cname_cname.
- * It accepts the arguments we now have.
- */
- result = has_table_privilege_cname_cname(username, relname, priv_type_text);
-
- PG_RETURN_BOOL(result);
-
-}
-
-
-/*
- * has_table_privilege_name_name
- * Check user privileges on a relation given
- * name usename, name relname, and text priv name.
- *
- * RETURNS
- * a boolean value
- * 't' indicating user has the privilege
- * 'f' indicating user does not have the privilege
- */
-Datum
-has_table_privilege_name_name(PG_FUNCTION_ARGS)
-{
- Name username_name;
- char *username;
- Name relname_name;
- char *relname;
- text *priv_type_text;
- bool result;
-
- username_name = PG_GETARG_NAME(0);
- relname_name = PG_GETARG_NAME(1);
- priv_type_text = PG_GETARG_TEXT_P(2);
-
- /*
- * Convert username and relname 'name' pattern to null-terminated string
- */
- username = DatumGetCString(DirectFunctionCall1(nameout, PointerGetDatum(username_name)));
- relname = DatumGetCString(DirectFunctionCall1(nameout, PointerGetDatum(relname_name)));
-
- /*
- * Make use of has_table_privilege_cname_cname.
- * It accepts the arguments we now have.
- */
- result = has_table_privilege_cname_cname(username, relname, priv_type_text);
-
- PG_RETURN_BOOL(result);
-
-}
-
-
-/*
- * has_table_privilege_tname
- * Check user privileges on a relation given
- * text relname and text priv name.
- * current_user is assumed
- *
- * RETURNS
- * a boolean value
- * 't' indicating user has the privilege
- * 'f' indicating user does not have the privilege
- */
-Datum
-has_table_privilege_tname(PG_FUNCTION_ARGS)
-{
- Oid usesysid = (Oid) -1;
- text *relname_text;
- char *relname;
- text *priv_type_text;
- bool result;
-
- relname_text = PG_GETARG_TEXT_P(0);
- priv_type_text = PG_GETARG_TEXT_P(1);
-
- usesysid = GetUserId();
-
- /*
- * Convert relname 'text' pattern to null-terminated string
- */
- relname = get_Name(relname_text);
-
- /*
- * Make use of has_table_privilege_id_cname.
- * It accepts the arguments we now have.
- */
- result = has_table_privilege_id_cname(usesysid, relname, priv_type_text);
-
- PG_RETURN_BOOL(result);
-
-}
-
-/*
- * has_table_privilege_name
- * Check user privileges on a relation given
- * name relname and text priv name.
- * current_user is assumed
- *
- * RETURNS
- * a boolean value
- * 't' indicating user has the privilege
- * 'f' indicating user does not have the privilege
- */
-Datum
-has_table_privilege_name(PG_FUNCTION_ARGS)
-{
- Oid usesysid = (Oid) -1;
- Name relname_name;
- char *relname;
- text *priv_type_text;
- bool result;
-
- relname_name = PG_GETARG_NAME(0);
- priv_type_text = PG_GETARG_TEXT_P(1);
-
- usesysid = GetUserId();
-
- /*
- * Convert relname 'Name' pattern to null-terminated string
- */
- relname = DatumGetCString(DirectFunctionCall1(nameout, PointerGetDatum(relname_name)));
-
- /*
- * Make use of has_table_privilege_id_cname.
- * It accepts the arguments we now have.
- */
- result = has_table_privilege_id_cname(usesysid, relname, priv_type_text);
-
- PG_RETURN_BOOL(result);
-
-}
-
-
-/*
- * has_table_privilege_tname_id
- * Check user privileges on a relation given
- * text usename, rel oid, and text priv name.
- *
- * RETURNS
- * a boolean value
- * 't' indicating user has the privilege
- * 'f' indicating user does not have the privilege
- */
-Datum
-has_table_privilege_tname_id(PG_FUNCTION_ARGS)
-{
- text *username_text;
- char *username;
- Oid reloid = 0;
- text *priv_type_text;
- bool result;
-
- username_text = PG_GETARG_TEXT_P(0);
- reloid = PG_GETARG_OID(1);
- priv_type_text = PG_GETARG_TEXT_P(2);
-
- /*
- * Convert username 'text' pattern to null-terminated string
- */
- username = get_Name(username_text);
-
- /*
- * Make use of has_table_privilege_cname_id.
- * It accepts the arguments we now have.
- */
- result = has_table_privilege_cname_id(username, reloid, priv_type_text);
-
- PG_RETURN_BOOL(result);
-
-}
-
-
-/*
- * has_table_privilege_name_id
- * Check user privileges on a relation given
- * name usename, rel oid, and text priv name.
- *
- * RETURNS
- * a boolean value
- * 't' indicating user has the privilege
- * 'f' indicating user does not have the privilege
- */
-Datum
-has_table_privilege_name_id(PG_FUNCTION_ARGS)
-{
- Name username_name;
- char *username;
- Oid reloid = 0;
- text *priv_type_text = NULL;
- bool result;
-
- username_name = PG_GETARG_NAME(0);
- reloid = PG_GETARG_OID(1);
- priv_type_text = PG_GETARG_TEXT_P(2);
-
- /*
- * Convert username 'name' pattern to null-terminated string
- */
- username = DatumGetCString(DirectFunctionCall1(nameout, PointerGetDatum(username_name)));
-
- /*
- * Make use of has_table_privilege_cname_id.
- * It accepts the arguments we now have.
- */
- result = has_table_privilege_cname_id(username, reloid, priv_type_text);
-
- PG_RETURN_BOOL(result);
-
-}
-
-
-/*
- * has_table_privilege_id
- * Check user privileges on a relation given
- * rel oid, and text priv name.
- * current_user is assumed
- *
- * RETURNS
- * a boolean value
- * 't' indicating user has the privilege
- * 'f' indicating user does not have the privilege
- */
-Datum
-has_table_privilege_id(PG_FUNCTION_ARGS)
-{
- char *username;
- Oid reloid = 0;
- text *priv_type_text;
- bool result;
-
- reloid = PG_GETARG_OID(0);
- priv_type_text = PG_GETARG_TEXT_P(1);
- username = GetUserName(GetUserId());
-
- /*
- * Make use of has_table_privilege_cname_id.
- * It accepts the arguments we now have.
- */
- result = has_table_privilege_cname_id(username, reloid, priv_type_text);
-
- PG_RETURN_BOOL(result);
-
-}
-
-
-/*
- * has_table_privilege_id_tname
- * Check user privileges on a relation given
- * usesysid, text relname, and priv name.
- *
- * RETURNS
- * a boolean value
- * 't' indicating user has the privilege
- * 'f' indicating user does not have the privilege
- */
-Datum
-has_table_privilege_id_tname(PG_FUNCTION_ARGS)
-{
- Oid usesysid;
- text *relname_text;
- char *relname;
- text *priv_type_text;
- bool result;
-
- usesysid = PG_GETARG_OID(0);
- relname_text = PG_GETARG_TEXT_P(1);
- priv_type_text = PG_GETARG_TEXT_P(2);
-
- /*
- * Convert relname 'text' pattern to null-terminated string
- */
- relname = get_Name(relname_text);
-
- /*
- * Make use of has_table_privilege_id_cname.
- * It accepts the arguments we now have.
- */
- result = has_table_privilege_id_cname(usesysid, relname, priv_type_text);
-
- PG_RETURN_BOOL(result);
-
-}
-
-
-/*
- * has_table_privilege_id_name
- * Check user privileges on a relation given
- * usesysid, name relname, and priv name.
- *
- * RETURNS
- * a boolean value
- * 't' indicating user has the privilege
- * 'f' indicating user does not have the privilege
- */
-Datum
-has_table_privilege_id_name(PG_FUNCTION_ARGS)
-{
- Oid usesysid;
- Name relname_name;
- char *relname;
- text *priv_type_text;
- bool result;
-
- usesysid = PG_GETARG_OID(0);
- relname_name = PG_GETARG_NAME(1);
- priv_type_text = PG_GETARG_TEXT_P(2);
-
- /*
- * Convert relname 'name' pattern to null-terminated string
- */
- relname = DatumGetCString(DirectFunctionCall1(nameout, PointerGetDatum(relname_name)));
-
- /*
- * Make use of has_table_privilege_id_cname.
- * It accepts the arguments we now have.
- */
- result = has_table_privilege_id_cname(usesysid, relname, priv_type_text);
-
- PG_RETURN_BOOL(result);
-
-}
-
-
-/*
- * has_table_privilege_id_id
- * Check user privileges on a relation given
- * usesysid, rel oid, and priv name.
- *
- * RETURNS
- * a boolean value
- * 't' indicating user has the privilege
- * 'f' indicating user does not have the privilege
- */
-Datum
-has_table_privilege_id_id(PG_FUNCTION_ARGS)
-{
- Oid usesysid;
- Oid reloid;
- char *relname;
- text *priv_type_text;
- HeapTuple tuple;
- AclMode mode;
- int32 result;
-
-
- usesysid = PG_GETARG_OID(0);
- reloid = PG_GETARG_OID(1);
- priv_type_text = PG_GETARG_TEXT_P(2);
-
- /*
- * Lookup relname based on rel oid
- */
- tuple = SearchSysCache(RELOID, ObjectIdGetDatum(reloid), 0, 0, 0);
- if (!HeapTupleIsValid(tuple)) {
- elog(ERROR, "has_table_privilege: invalid relation oid %d", (int) reloid);
- }
-
- relname = NameStr(((Form_pg_class) GETSTRUCT(tuple))->relname);
-
- ReleaseSysCache(tuple);
-
- /*
- * Convert priv_type_text to an AclMode
- */
- mode = convert_priv_string(priv_type_text);
-
- /*
- * Finally, check for the privilege
- */
- result = pg_aclcheck(relname, usesysid, mode);
-
- if (result == ACLCHECK_OK) {
- PG_RETURN_BOOL(TRUE);
- } else {
- PG_RETURN_BOOL(FALSE);
- }
-
-}
-
-/*
- * Internal functions.
- */
-
-/*
- * convert_priv_string
- * Internal function.
- * Return mode from priv_type string
- *
- * RETURNS
- * AclMode
- */
-
-AclMode
-convert_priv_string(text *priv_type_text)
-{
- char *priv_type = DatumGetCString(DirectFunctionCall1(textout, PointerGetDatum(priv_type_text)));
-
- /*
- * Return mode from priv_type string
- */
- if (strcasecmp(priv_type, "SELECT") == 0)
- return ACL_SELECT;
-
- if (strcasecmp(priv_type, "INSERT") == 0)
- return ACL_INSERT;
-
- if (strcasecmp(priv_type, "UPDATE") == 0)
- return ACL_UPDATE;
-
- if (strcasecmp(priv_type, "DELETE") == 0)
- return ACL_DELETE;
-
- if (strcasecmp(priv_type, "RULE") == 0)
- return ACL_RULE;
-
- if (strcasecmp(priv_type, "REFERENCES") == 0)
- return ACL_REFERENCES;
-
- if (strcasecmp(priv_type, "TRIGGER") == 0)
- return ACL_TRIGGER;
-
- elog(ERROR, "has_table_privilege: invalid privilege type %s", priv_type);
- /*
- * We should never get here, but stop the compiler from complaining
- */
- return ACL_NO;
-
-}
-
-/*
- * has_table_privilege_cname_cname
- * Check user privileges on a relation given
- * char *usename, char *relname, and text priv name.
- *
- * RETURNS
- * a boolean value
- * 't' indicating user has the privilege
- * 'f' indicating user does not have the privilege
- */
-bool
-has_table_privilege_cname_cname(char *username, char *relname, text *priv_type_text)
-{
-
- Oid usesysid = (Oid) -1;
- HeapTuple tuple;
- bool result;
-
- /*
- * Lookup userid based on username
- */
-
- tuple = SearchSysCache(SHADOWNAME, NameGetDatum(username), 0, 0, 0);
- if (!HeapTupleIsValid(tuple)) {
- elog(ERROR, "has_table_privilege: invalid user name %s", (char *) username);
- }
-
- usesysid = (Oid) ((Form_pg_shadow) GETSTRUCT(tuple))->usesysid;
- ReleaseSysCache(tuple);
-
- /*
- * Make use of has_table_privilege_id_cname.
- * It accepts the arguments we now have.
- */
- result = has_table_privilege_id_cname(usesysid, relname, priv_type_text);
-
- return result;
-
-}
-
-
-/*
- * has_table_privilege_cname_id
- * Check user privileges on a relation given
- * char *usename, rel oid, and text priv name.
- *
- * RETURNS
- * a boolean value
- * 't' indicating user has the privilege
- * 'f' indicating user does not have the privilege
- */
-bool
-has_table_privilege_cname_id(char *username, Oid reloid, text *priv_type_text)
-{
- Oid usesysid = (Oid) -1;
- char *relname = NULL;
- HeapTuple tuple;
- bool result;
-
- /*
- * Lookup userid based on username
- */
-
- tuple = SearchSysCache(SHADOWNAME, NameGetDatum(username), 0, 0, 0);
- if (!HeapTupleIsValid(tuple)) {
- elog(ERROR, "has_table_privilege: invalid user name %s", (char *) username);
- }
-
- usesysid = (Oid) ((Form_pg_shadow) GETSTRUCT(tuple))->usesysid;
-
- ReleaseSysCache(tuple);
-
- /*
- * Lookup relname based on rel oid
- */
- tuple = SearchSysCache(RELOID, ObjectIdGetDatum(reloid), 0, 0, 0);
- if (!HeapTupleIsValid(tuple)) {
- elog(ERROR, "has_table_privilege: invalid relation oid %d", (int) reloid);
- }
-
- relname = NameStr(((Form_pg_class) GETSTRUCT(tuple))->relname);
-
- ReleaseSysCache(tuple);
-
- /*
- * Make use of has_table_privilege_id_cname.
- * It accepts the arguments we now have.
- */
- result = has_table_privilege_id_cname(usesysid, relname, priv_type_text);
-
- return result;
-
-}
-
-
-/*
- * has_table_privilege_id_cname
- * Check user privileges on a relation given
- * usesysid, char *relname, and text priv name.
- *
- * RETURNS
- * a boolean value
- * 't' indicating user has the privilege
- * 'f' indicating user does not have the privilege
- */
-bool
-has_table_privilege_id_cname(Oid usesysid, char *relname, text *priv_type_text)
-{
-
- HeapTuple tuple;
- AclMode mode;
- int32 result;
-
- /*
- * Check relname is valid.
- * This is needed to deal with the case when usename is a superuser
- * in which case pg_aclcheck simply returns ACLCHECK_OK
- * without validating relname
- */
- tuple = SearchSysCache(RELNAME, PointerGetDatum(relname), 0, 0, 0);
-
- if (!HeapTupleIsValid(tuple)) {
- elog(ERROR, "has_table_privilege: invalid relname %s", relname);
- }
- ReleaseSysCache(tuple);
-
- /*
- * Convert priv_type_text to an AclMode
- */
- mode = convert_priv_string(priv_type_text);
-
- /*
- * Finally, check for the privilege
- */
- result = pg_aclcheck(relname, usesysid, mode);
-
- if (result == ACLCHECK_OK) {
- return TRUE;
- } else {
- return FALSE;
- }
-
-}
-
-
-/*
- * Given a 'text' relname parameter to a function, extract the actual
- * relname. We downcase the name if it's not double-quoted,
- * and truncate it if it's too long.
- *
- * This is a kluge, really --- should be able to write, e.g. nextval(seqrel).
- */
-static char *
-get_Name(text *relin)
-{
- char *rawname = DatumGetCString(DirectFunctionCall1(textout,
- PointerGetDatum(relin)));
- int rawlen = strlen(rawname);
- char *relname;
-
- if (rawlen >= 2 &&
- rawname[0] == '\"' && rawname[rawlen - 1] == '\"')
- {
- /* strip off quotes, keep case */
- rawname[rawlen - 1] = '\0';
- relname = pstrdup(rawname + 1);
- pfree(rawname);
- }
- else
- {
- relname = rawname;
-
- /*
- * It's important that this match the identifier downcasing code
- * used by backend/parser/scan.l.
- */
- for (; *rawname; rawname++)
- {
- if (isupper((unsigned char) *rawname))
- *rawname = tolower((unsigned char) *rawname);
- }
- }
-
- /* Truncate name if it's overlength; again, should match scan.l */
- if (strlen(relname) >= NAMEDATALEN)
- {
-#ifdef MULTIBYTE
- int len;
-
- len = pg_mbcliplen(relname, i, NAMEDATALEN-1);
- relname[len] = '\0';
-#else
- relname[NAMEDATALEN-1] = '\0';
-#endif
- }
-
- return relname;
-}
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