selabel_open (3) - Linux Manuals
selabel_open: userspace SELinux labeling interface
NAME
selabel_open, selabel_close - userspace SELinux labeling interface
SYNOPSIS
#include <selinux/selinux.h>#include <selinux/label.h>
struct selabel_handle *selabel_open(int backend,
const struct selinux_opt *options,
unsigned nopt);
void selabel_close(struct selabel_handle *hnd);
DESCRIPTION
selabel_open() is used to initialize a labeling handle to be used for lookup operations. The backend argument specifies which backend is to be opened; the list of current backends appears in BACKENDS below.The options argument should be NULL or a pointer to an array of selinux_opt structures of length nopt:
-
struct selinux_opt { int type; const char *value; };
The available option types are described in GLOBAL OPTIONS below as well as in the documentation for each individual backend. The return value on success is a non-NULL value for use in subsequent label operations.
selabel_close() terminates use of a handle, freeing any internal resources associated with it. After this call has been made, the handle must not be used again.
GLOBAL OPTIONS
Global options which may be passed to selabel_open() include the following:- SELABEL_OPT_UNUSED
- The option with a type code of zero is a no-op. Thus an array of options may be initizalized to zero and any untouched elements will not cause an error.
- SELABEL_OPT_VALIDATE
- A non-null value for this option enables context validation. By default, security_check_context(3) is used; a custom validation function can be provided via selinux_set_callback(3). Note that an invalid context may not be treated as an error unless it is actually encountered during a lookup operation.
- SELABEL_OPT_DIGEST
- A non-null value for this option enables the generation of an SHA1 digest of the spec files loaded as described in selabel_digest(3)
BACKENDS
- SELABEL_CTX_FILE
- File contexts backend, described in selabel_file(5).
- SELABEL_CTX_MEDIA
- Media contexts backend, described in selabel_media(5).
- SELABEL_CTX_X
- X Windows contexts backend, described in selabel_x(5).
- SELABEL_CTX_DB
- Database objects contexts backend, described in selabel_db(5).