управление архитектурами фильтров seccomp (manage seccomp filter architectures)
Имя (Name)
seccomp_arch_add, seccomp_arch_remove, seccomp_arch_exist,
seccomp_arch_native - Manage seccomp filter architectures
Синопсис (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_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_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.
Описание (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.
Возвращаемое значение (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.
Примеры (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;
}
Примечание (Note)
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.
