NAME¶

selabel_db - userspace SELinux labeling interface: DB objects contexts backend.

SYNOPSIS¶

#include <selinux/selinux.h>

#include <selinux/label.h>

int selabel_lookup(struct selabel_handle *hnd,
security_context_t *context,

const char *object_name, int object_type);

DESCRIPTION¶

The DB contexts backend maps from a pair of object name and class into security contexts. It is used to find the appropriate context for database objects when relabeling a certain database.

The object_name should be fully qualified name using the hierarchy of database objects. For example, the pg_class table in the postgres database and pg_catalog schema should be qualified as postgres.pg_catalog.pg_class .

The object_type argument should be set to one of the following values:

SELABEL_DB_DATABASE

The object_name argument specifies the name of a database itself, such as "postgres".

SELABEL_DB_SCHEMA

The object_name argument specifies the name of a schema object, such as "postgres.public".

SELABEL_DB_TABLE

The object_name argument specifies the name of a table object, such as "postgres.public.my_table"

SELABEL_DB_COLUMN

The object_name argument specifies the name of a column object, such as "postgres.public.my_table.user_id"

SELABEL_DB_TUPLE

The object_name argument specifies the name of a table object which contains the tuples to be relabeled, such as "postgresql.public.my_table". Note that we have no way to identify individual tuple objects, except for WHERE clause on DML statements, because it has no name.

SELABEL_DB_PROCEDURE

The object_name argument specifies the name of a procedure object, such as "postgres.public.my_func". Note that we don't support to lookup individual security contexts for each procedures which have same name but different arguments.

SELABEL_DB_SEQUENCE

The object_name argument specifies the name of a sequence object, such as "postgres.public.my_seq".

SELABEL_DB_BLOB

The object_name argument specifies the name of a large object, such as "postgres.16308". Note that a large object does not have its name, so it is identified by its identifier value.

OPTIONS¶

In addition to the global options described in selabel_open(3), this backend recognizes the following options:

SELABEL_OPT_PATH

A non-null value for this option specifies a path to a file that will be opened in lieu of the standard DB contexts file. It tries to open the specfile designed for SE-PostgreSQL in the default, so if another RDBMS uses this interface, it needs to give an explicit specfile designed for the RDBMS.

SEE ALSO¶

selabel_open(3), selabel_lookup(3), selabel_stats(3), selinux(8)