selinux_file_context_verify(3)selinux_file_context_verify(3)NAMEselinux_file_context_verify - Compare the SELinux security context on
disk to the default security context required by the policy file con‐
texts file
SYNOPSIS
#include <selinux/selinux.h>
int selinux_file_context_verify(const char *path, mode_t mode);
DESCRIPTIONselinux_file_context_verify() compares the context of the specified
path that is held on disk (in the extended attribute), to the system
default entry held in the file contexts series of files.
The mode may be zero.
Note that the two contexts are compared for "significant" differences
(i.e. the user component of the contexts are ignored) as shown in the
EXAMPLE section.
RETURN VALUE
If the contexts significantly match, 1 (one) is returned.
If the contexts do not match 0 (zero) is returned and errno is set to
either ENOENT or EINVAL for the reasons listed in the ERRORS section,
or if errno = 0 then the contexts did not match.
On failure -1 is returned and errno set appropriately.
ERRORS
ENOTSUP
if extended attributes are not supported by the file system.
ENOENT if there is no entry in the file contexts series of files or
path does not exist.
EINVAL if the entry in the file contexts series of files or path are
invalid, or the returned context fails validation.
ENOMEM if attempt to allocate memory failed.
FILES
The following configuration files (the file contexts series of files)
supporting the active policy will be used (should they exist) to deter‐
mine the path default context:
contexts/files/file_contexts - This file must exist.
contexts/files/file_contexts.local - If exists has local cus‐
tomizations.
contexts/files/file_contexts.homedirs - If exists has users home
directory customizations.
contexts/files/file_contexts.subs - If exists has substitutions
that are then applied to the 'in memory' version of the file
contexts files.
EXAMPLE
If the files context is:
unconfined_u:object_r:admin_home_t:s0
and the default context defined in the file contexts file is:
system_u:object_r:admin_home_t:s0
then the actual strings compared are:
:object_r:admin_home_t:s0 and :object_r:admin_home_t:s0
Therefore they will match and selinux_file_context_verify() will return
1.
SEE ALSOselinux(8)SELinux API documentation 08 March 2011 selinux_file_context_verify(3)
