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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLE | AUTHOR | SEE ALSO | COLOPHON |
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selinux_set_mapping(3) SELinux API documentation selinux_set_mapping(3)
selinux_set_mapping - establish dynamic object class and permission
mapping
#include <selinux/selinux.h>
struct security_class_mapping {
const char *name;
const char *perms[];
};
int selinux_set_mapping(struct security_class_mapping *map);
selinux_set_mapping() establishes a mapping from a user-provided
ordering of object classes and permissions to the numbers actually
used by the loaded system policy. Use of this function is highly
preferred over the generated constants in the libselinux header
files, as this method allows the policy's class and permission values
to change over time.
After the mapping is established, all libselinux functions that
operate on class and permission values take the user-provided
numbers, which are determined as follows:
The map argument consists of an array of security_class_mapping
structures, which must be terminated by a structure having a NULL
name field. Except for this last structure, the name field should
refer to the string name of an object class, and the corresponding
perms field should refer to an array of permission bit names
terminated by a NULL string.
The object classes named in the mapping and the bit indexes of each
set of permission bits named in the mapping are numbered in order
starting from 1. These numbers are the values that should be passed
to subsequent libselinux calls.
Zero is returned on success. On error, -1 is returned and errno is
set appropriately.
EINVAL One of the class or permission names requested in the mapping
is not present in the loaded policy.
ENOMEM An attempt to allocate memory failed.
struct security_class_mapping map[] = {
{ "file", { "create", "unlink", "read", "write", NULL } },
{ "socket", { "bind", NULL } },
{ "process", { "signal", NULL } },
{ NULL }
};
if (selinux_set_mapping(map) < 0)
exit(1);
In this example, after the call has succeeded, classes file, socket,
and process will be identified by 1, 2 and 3, respectively.
Permissions create, unlink, read, and write (for the file class) will
be identified by 1, 2, 4, and 8 respectively. Classes and
permissions not listed in the mapping cannot be used.
Eamon Walsh <ewalsh@tycho.nsa.gov>
avc_open(8), selinux(8)
This page is part of the selinux (Security-Enhanced Linux user-space
libraries and tools) project. Information about the project can be
found at ⟨https://github.com/SELinuxProject/selinux/wiki⟩. If you
have a bug report for this manual page, see
⟨https://github.com/SELinuxProject/selinux/wiki/Contributing⟩. This
page was obtained from the project's upstream Git repository
⟨https://github.com/SELinuxProject/selinux⟩ on 2018-02-02. (At that
time, the date of the most recent commit that was found in the repos‐
itory was 2018-01-25.) If you discover any rendering problems in
this HTML version of the page, or you believe there is a better or
more up-to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not part
of the original manual page), send a mail to man-pages@man7.org
12 Jun 2008 selinux_set_mapping(3)
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