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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | EXAMPLES | NOTES | AUTHOR | SEE ALSO | COLOPHON |
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seccomp_merge(3) libseccomp Documentation seccomp_merge(3)
seccomp_merge - Merge two seccomp filters
#include <seccomp.h>
typedef void * scmp_filter_ctx;
int seccomp_merge(scmp_filter_ctx dst, scmp_filter_ctx src);
Link with -lseccomp.
The seccomp_merge() function merges the seccomp filter in src with
the filter in dst and stores the resulting in the dst filter. If
successful, the src seccomp filter is released and all internal
memory associated with the filter is freed; there is no need to call
seccomp_release(3) on src and the caller should discard any
references to the filter.
In order to merge two seccomp filters, both filters must have the
same attribute values and no overlapping architectures.
Returns zero on success and negative values on failure.
#include <seccomp.h>
int main(int argc, char *argv[])
{
int rc = -1;
scmp_filter_ctx ctx_32, ctx_64;
ctx_32 = seccomp_init(SCMP_ACT_KILL);
if (ctx_32 == NULL)
goto out_all;
ctx_64 = seccomp_init(SCMP_ACT_KILL);
if (ctx_64 == NULL)
goto out_all;
if (seccomp_arch_exist(ctx_32, SCMP_ARCH_X86) == -EEXIST) {
rc = seccomp_arch_add(ctx_32, SCMP_ARCH_X86);
if (rc != 0)
goto out_all;
rc = seccomp_arch_remove(ctx_32, SCMP_ARCH_NATIVE);
if (rc != 0)
goto out_all;
}
if (seccomp_arch_exist(ctx_64, SCMP_ARCH_X86_64) == -EEXIST) {
rc = seccomp_arch_add(ctx_64, SCMP_ARCH_X86_64);
if (rc != 0)
goto out_all;
rc = seccomp_arch_remove(ctx_64, SCMP_ARCH_NATIVE);
if (rc != 0)
goto out_all;
}
/* ... */
rc = seccomp_merge(ctx_64, ctx_32);
if (rc != 0)
goto out_all;
/* NOTE: the 'ctx_32' filter is no longer valid at this point */
/* ... */
out:
seccomp_release(ctx_64);
return -rc;
out_all:
seccomp_release(ctx_32);
goto out;
}
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_arch_add(3),
seccomp_arch_remove(3), seccomp_attr_get(3), seccomp_attr_set(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 28 September 2012 seccomp_merge(3)
Pages that refer to this page: seccomp_arch_add(3)
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