HTML rendering created 2025-09-06 byMichael Kerrisk, author ofThe Linux Programming Interface. For details of in-depthLinux/UNIX system programming training courses that I teach, lookhere. Hosting byjambit GmbH. |  |
NAME |SYNOPSIS |DESCRIPTION |RETURN VALUE |EXAMPLES |NOTES |AUTHOR |SEE ALSO |COLOPHON | |
seccomp_merge(3) libseccomp Documentationseccomp_merge(3)seccomp_merge - Merge two seccomp filters
#include <seccomp.h>typedef void * scmp_filter_ctx;int seccomp_merge(scmp_filter_ctxdst, scmp_filter_ctxsrc); Link with-lseccomp.
Theseccomp_merge() function merges the seccomp filter insrc with the filter indst and stores the resulting in thedst filter. If successful, thesrc seccomp filter is released and all internal memory associated with the filter is freed; there is no need to callseccomp_release(3) onsrc 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 or one of the following error codes on failure:-EDOMUnable to merge the filters due to architecture issues, e.g. byte endian mismatches.-EEXIST The architecture already exists in the filter.-EINVAL One of the filters is invalid.-ENOMEM The library was unable to allocate enough memory.
#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 */ rc = seccomp_merge(ctx_64, ctx_32); if (rc != 0) goto out_all; /* NOTE: the 'ctx_32' filter is no longer valid at this point */ /* ...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 athttps://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 thelibseccomp (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 2025-08-11. (At that time, the date of the most recent commit that was found in the repository was 2025-05-09.) 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 isnot part of the original manual page), send a mail to man-pages@man7.orgpaul@paul-moore.com 30 May 2020seccomp_merge(3)Pages that refer to this page:seccomp_arch_add(3)
HTML rendering created 2025-09-06 byMichael Kerrisk, author ofThe Linux Programming Interface. For details of in-depthLinux/UNIX system programming training courses that I teach, lookhere. Hosting byjambit GmbH. | |