seccomp_arch_add
Section: libseccomp Documentation (3)
Updated: 15 June 2020
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NAME
seccomp_arch_add, seccomp_arch_remove, seccomp_arch_exist, seccomp_arch_native - Manage seccomp filter architectures
SYNOPSIS
#include <seccomp.h>
typedef void * scmp_filter_ctx;
#define SCMP_ARCH_NATIVE
#define SCMP_ARCH_X86
#define SCMP_ARCH_X86_64
#define SCMP_ARCH_X32
#define SCMP_ARCH_ARM
#define SCMP_ARCH_AARCH64
#define SCMP_ARCH_LOONGARCH64
#define SCMP_ARCH_M68K
#define SCMP_ARCH_MIPS
#define SCMP_ARCH_MIPS64
#define SCMP_ARCH_MIPS64N32
#define SCMP_ARCH_MIPSEL
#define SCMP_ARCH_MIPSEL64
#define SCMP_ARCH_MIPSEL64N32
#define SCMP_ARCH_PPC
#define SCMP_ARCH_PPC64
#define SCMP_ARCH_PPC64LE
#define SCMP_ARCH_S390
#define SCMP_ARCH_S390X
#define SCMP_ARCH_SH
#define SCMP_ARCH_SHEB
#define SCMP_ARCH_PARISC
#define SCMP_ARCH_PARISC64
#define SCMP_ARCH_RISCV64
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.
DESCRIPTION
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.
RETURN VALUE
The
seccomp_arch_add(),
seccomp_arch_remove(),
and
seccomp_arch_exist()
functions return zero on success or one of the following error codes on
failure:
- -EDOM
-
Architecture specific failure.
- -EEXIST
-
In the case of
seccomp_arch_add()
the architecture already exists and in the case of
seccomp_arch_remove()
the architecture does not exist.
- -EINVAL
-
Invalid input, either the context or architecture token is invalid.
- -ENOMEM
-
The library was unable to allocate enough memory.
EXAMPLES
#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;
}
NOTES
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.
AUTHOR
Paul Moore <
paul@pau-moore.com>
SEE ALSO
seccomp_init(3),
seccomp_reset(3),
seccomp_merge(3)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- EXAMPLES
-
- NOTES
-
- AUTHOR
-
- SEE ALSO
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