NAME

       seccomp_load - Load the current seccomp filter into the kernel

SYNOPSIS

       #include <seccomp.h>

       typedef void * scmp_filter_ctx;

       int seccomp_load(scmp_filter_ctx ctx);

       Link with -lseccomp.

DESCRIPTION

       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

       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

       #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

       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

       Paul Moore <paul@paul-moore.com>

SEE ALSO

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

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