Hey Emacs! This file is -*- nroff -*- source. Author: Eamon Walsh (ewalsh@tycho.nsa.gov) 2007 "selabel_open" "3" "18 Jun 2007" "" "SELinux API documentation"
"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). .
"RETURN VALUE"
A non-NULL handle value is returned on success. On error, NULL is returned and
errno is set appropriately.
.
"AUTHOR"
Eamon Walsh <ewalsh@tycho.nsa.gov>
.
"SEE ALSO"
selabel_lookup (3), selabel_stats (3), selinux_set_callback (3), selinux (8)