|
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | EXAMPLES | NOTES | AUTHOR | SEE ALSO | COLOPHON |
|
seccomp_arch_add(3) libseccomp Documentation seccomp_arch_add(3)
seccomp_arch_add, seccomp_arch_remove, seccomp_arch_exist, sec‐
comp_arch_native - Manage seccomp filter architectures
#include <seccomp.h>
typedef void * scmp_filter_ctx;
#define SCMP_ARCH_NATIVE
#define SCMP_ARCH_X86
#define SCMP_ARCH_X86_64
uint32_t seccomp_arch_resolve_name(const char *arch_name);
uint32_t seccomp_arch_native();
int seccomp_arch_exist(const scmp_filter_ctx ctx, uint32_t arch_token);
int seccomp_arch_add(scmp_filter_ctx ctx, uint32_t arch_token);
int seccomp_arch_remove(scmp_filter_ctx ctx, uint32_t arch_token);
Link with -lseccomp.
The seccomp_arch_exist() function tests to see if a given
architecture has been added to the seccomp filter in ctx , where the
seccomp_arch_add() and seccomp_arch_remove() add and remove,
respectively, architectures from the seccomp filter. In all three
functions, the architecture values given in arch_token should be the
SCMP_ARCH_* defined constants; with the SCMP_ARCH_NATIVE constant
always referring to the native compiled architecture. The
seccomp_arch_native() function returns the system's architecture such
that it will match one of the SCMP_ARCH_* constants. While the
seccomp_arch_resolve_name() function also returns a SCMP_ARCH_*
constant, the returned token matches the name of the architecture
passed as an argument to the function.
When a seccomp filter is initialized with the call to seccomp_init(3)
the native architecture is automatically added to the filter.
While it is possible to remove all architectures from a filter, most
of the libseccomp APIs will fail if the filter does not contain at
least one architecture.
When adding a new architecture to an existing filter, the existing
rules will not be added to the new architecture. However, rules
added after adding the new architecture will be added to all of the
architectures in the filter.
The seccomp_arch_add() and seccomp_arch_remove() functions return
zero on success, negative errno values on failure. The
seccomp_arch_exist() function returns zero if the architecture
exists, -EEXIST if it does not, and other negative errno values on
failure.
#include <seccomp.h>
int main(int argc, char *argv[])
{
int rc = -1;
scmp_filter_ctx ctx;
ctx = seccomp_init(SCMP_ACT_KILL);
if (ctx == NULL)
goto out;
if (seccomp_arch_exist(ctx, SCMP_ARCH_X86) == -EEXIST) {
rc = seccomp_arch_add(ctx, SCMP_ARCH_X86);
if (rc != 0)
goto out_all;
rc = seccomp_arch_remove(ctx, SCMP_ARCH_NATIVE);
if (rc != 0)
goto out_all;
}
/* ... */
out:
seccomp_release(ctx);
return -rc;
}
While the seccomp filter can be generated independent of the kernel,
kernel support is required to load and enforce the seccomp filter
generated by libseccomp.
The libseccomp project site, with more information and the source
code repository, can be found at
https://github.com/seccomp/libseccomp. This tool, as well as the
libseccomp library, is currently under development, please report any
bugs at the project site or directly to the author.
Paul Moore <paul@paul-moore.com>
seccomp_init(3), seccomp_reset(3), seccomp_merge(3)
This page is part of the libseccomp (high-level API to the Linux
Kernel's seccomp filter) project. Information about the project can
be found at ⟨https://github.com/seccomp/libseccomp⟩. If you have a
bug report for this manual page, see
⟨https://groups.google.com/d/forum/libseccomp⟩. This page was
obtained from the project's upstream Git repository
⟨https://github.com/seccomp/libseccomp⟩ 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
paul@paul-moore.com 7 May 2014 seccomp_arch_add(3)
Pages that refer to this page: seccomp_merge(3)
|
HTML rendering created 2018-02-02 by Michael Kerrisk, author of The Linux Programming Interface, maintainer of the Linux man-pages project. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.
|
|