seccomp_load(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | EXAMPLES | NOTES | AUTHOR | SEE ALSO | COLOPHON

seccomp_load(3)           libseccomp Documentation           seccomp_load(3)

NAME         top

       seccomp_load - Load the current seccomp filter into the kernel

SYNOPSIS         top

       #include <seccomp.h>

       typedef void * scmp_filter_ctx;

       int seccomp_load(scmp_filter_ctx ctx);

       Link with -lseccomp.

DESCRIPTION         top

       Loads the seccomp filter provided by ctx into the kernel; if the
       function succeeds the new seccomp filter will be active when the
       function returns.

       As it is possible to have multiple stacked seccomp filters for a
       given task (defined as either a process or a thread), it is important
       to remember that each of the filters loaded for a given task are
       executed when a syscall is made and the "strictest" rule is the rule
       that is applied.  In the case of seccomp, "strictest" is defined as
       the action with the lowest value (e.g.  SCMP_ACT_KILL is "stricter"
       than SCMP_ACT_ALLOW ).

RETURN VALUE         top

       Returns zero on success or one of the following error codes on
       failure:

       -ECANCELED
              There was a system failure beyond the control of the library.

       -EFAULT
              Internal libseccomp failure.

       -EINVAL
              Invalid input, either the context or architecture token is
              invalid.

       -ENOMEM
              The library was unable to allocate enough memory.

       -ESRCH Unable to load the filter due to thread issues.

       If the SCMP_FLTATR_API_SYSRAWRC filter attribute is non-zero then
       additional error codes may be returned to the caller; these
       additional error codes are the negative errno values returned by the
       system.  Unfortunately libseccomp can make no guarantees about these
       return values.

EXAMPLES         top

       #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;

            /* ... */

            rc = seccomp_load(ctx);
            if (rc < 0)
                 goto out;

            /* ... */

       out:
            seccomp_release(ctx);
            return -rc;
       }

NOTES         top

       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         top

       Paul Moore <paul@paul-moore.com>

SEE ALSO         top

       seccomp_init(3), seccomp_reset(3), seccomp_release(3),
       seccomp_rule_add(3), seccomp_rule_add_exact(3)

COLOPHON         top

       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 2020-09-18.  (At that
       time, the date of the most recent commit that was found in the repos‐
       itory was 2020-09-15.)  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              30 May 2020                 seccomp_load(3)

Pages that refer to this page: seccomp(2)seccomp_attr_get(3)seccomp_attr_set(3)seccomp_rule_add(3)seccomp_rule_add_array(3)seccomp_rule_add_exact(3)seccomp_rule_add_exact_array(3)