пользовательский интерфейс маркировки SELinux и формат файла конфигурации для бэкэнда медиа-контекстов (userspace SELinux labeling interface and configuration file format for the media contexts backend)
Имя (Name)
selabel_media - userspace SELinux labeling interface and
configuration file format for the media contexts backend
Синопсис (Synopsis)
#include <selinux/label.h>
int selabel_lookup(struct selabel_handle *hnd,
char **context,
const char *device_name, int unused);
int selabel_lookup_raw(struct selabel_handle *hnd,
char **context,
const char *device_name, int unused);
Описание (Description)
The media contexts backend maps from media device names such as
"cdrom" or "floppy" into security contexts. It is used to find
the appropriate context for establishing context mounts on these
devices. The returned context must be freed using freecon(3).
selabel_lookup(3) describes the function with its return and
error codes.
The integer lookup argument is currently unused and should be set
to zero.
Any messages generated by selabel_lookup(3) are sent to stderr by
default, although this can be changed by selinux_set_callback(3).
selabel_lookup_raw(3) behaves identically to selabel_lookup(3)
but does not perform context translation.
The FILES section details the configuration files used to
determine the media context.
Параметры (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 media
contexts file.
Файлы (Files)
The media context file used to retrieve a default context depends
on the SELABEL_OPT_PATH parameter passed to selabel_open(3). If
NULL, then the SELABEL_OPT_PATH value will default to the active
policy media contexts location (as returned by
selinux_media_context_path(3)), otherwise the actual
SELABEL_OPT_PATH value specified is used.
The default media contexts file is:
/etc/selinux/{SELINUXTYPE}/contexts/files/media
Where {SELINUXTYPE} is the entry from the selinux configuration
file config (see selinux_config(5)).
Формат файла (File format)
Each line within the media file is as follows:
device_name context
Where:
device_name
The media identifier (e.g. cdrom, floppy, disk and
usb).
context
The context to be used for labeling the device.
Example:
# contexts/files/media
cdrom system_u:object_r:removable_device_t
floppy system_u:object_r:removable_device_t
disk system_u:object_r:fixed_disk_device_t
Примечание (Note)
If contexts are to be validated, then the global option
SELABEL_OPT_VALIDATE must be set before calling selabel_open(3).
If this is not set, then it is possible for an invalid context to
be returned.
Смотри также (See also)
selinux(8), selabel_open(3), selabel_lookup(3), selabel_stats(3),
selabel_close(3), selinux_set_callback(3),
selinux_media_context_path(3), freecon(3), selinux_config(5)
