.\" Hey Emacs! This file is -*- nroff -*- source.
.\"
.\" Author: KaiGai Kohei <kaigai@ak.jp.nec.com> 2009
.TH "selabel_db" "5" "22 Nov 2009" "" "SELinux API documentation"
.SH "NAME"
selabel_db \- userspace SELinux labeling interface: DB objects contexts backend.
.SH "SYNOPSIS"
.B #include <selinux/selinux.h>

.B #include <selinux/label.h>
.sp
.BI "int selabel_lookup(struct selabel_handle *" hnd ,
.in +\w'int selabel_lookup('u
.BI "security_context_t *" context ,

.BI "const char *" object_name ", int " object_type ");"

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

The
.I object_type
argument should be set to one of the following values:
.TP
.B SELABEL_DB_DATABASE
The
.I object_name
argument specifies the name of a database itself, such as "postgres".
.TP
.B SELABEL_DB_SCHEMA
The
.I object_name
argument specifies the name of a schema object, such as "postgres.public".
.TP
.B SELABEL_DB_TABLE
The
.I object_name
argument specifies the name of a table object, such as "postgres.public.my_table"
.TP
.B SELABEL_DB_COLUMN
The
.I object_name
argument specifies the name of a column object, such as "postgres.public.my_table.user_id"
.TP
.B SELABEL_DB_TUPLE
The
.I 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.
.TP
.B SELABEL_DB_PROCEDURE
The
.I 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.
.TP
.B SELABEL_DB_SEQUENCE
The
.I object_name
argument specifies the name of a sequence object, such as "postgres.public.my_seq".
.TP
.B SELABEL_DB_BLOB
The
.I 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.

.SH "OPTIONS"
In addition to the global options described in 
.BR selabel_open (3),
this backend recognizes the following options:

.TP
.B 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.

.SH "SEE ALSO"
.BR selabel_open (3),
.BR selabel_lookup (3),
.BR selabel_stats (3),
.BR selinux (8)