seccomp_load - Load the current seccomp filter into the kernel

       Paul Moore <paul@paul-moore.com>

       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.  If seccomp_precompute(3) was called prior to attempting to
       load the seccomp filter, and no changes have been made to the filter, seccomp_load() can be considered to
       be async-signal-safe.

       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).

       #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;
       }

       seccomp_load - Load the current seccomp filter into the kernel

       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.

       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.

seccomp_init(3),  seccomp_reset(3),  seccomp_release(3),  seccomp_rule_add(3),  seccomp_rule_add_exact(3)
       seccomp_precompute(3) signal-safety(7)

paul@paul-moore.com                                30 May 2020                                   seccomp_load(3)

#include<seccomp.h>typedefvoid*scmp_filter_ctx;intseccomp_load(scmp_filter_ctxctx);

       Link with -lseccomp.