seccomp_syscall_resolve_name(3) — Linux manual page

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

seccomp_syscall_resolve_name(3)omp Documentation_syscall_resolve_name(3)

NAME         top

       seccomp_syscall_resolve_name - Resolve a syscall name

SYNOPSIS         top

       #include <seccomp.h>

       int seccomp_syscall_resolve_name(const char *name);
       int seccomp_syscall_resolve_name_arch(uint32_t arch_token,
                                             const char *name);
       int seccomp_syscall_resolve_name_rewrite(uint32_t arch_token,
                                                const char *name);
       char *seccomp_syscall_resolve_num_arch(uint32_t arch_token, int num);

       Link with -lseccomp.

DESCRIPTION         top

       The seccomp_syscall_resolve_name(),
       seccomp_syscall_resolve_name_arch(), and
       seccomp_syscall_resolve_name_rewrite() functions resolve the
       commonly used syscall name to the syscall number used by the
       kernel and the rest of the libseccomp API, with
       seccomp_syscall_resolve_name_rewrite() rewriting the syscall
       number for architectures that modify the syscall.  Syscall
       rewriting typically happens in case of a multiplexed syscall,
       like socketcall(2) or ipc(2) on x86.
       seccomp_syscall_resolve_num_arch() function resolves the syscall
       number used by the kernel to the commonly used syscall name.

       The caller is responsible for freeing the returned string from
       seccomp_syscall_resolve_num_arch().

RETURN VALUE         top

       In the case of seccomp_syscall_resolve_name(),
       seccomp_syscall_resolve_name_arch(), and
       seccomp_syscall_resolve_name_rewrite() the associated syscall
       number is returned, with the negative pseudo syscall number being
       returned in cases where the given syscall does not exist for the
       architecture.  The value __NR_SCMP_ERROR is returned in case of
       error.  In all cases, the return value is suitable for use in any
       libseccomp API function which requires the syscall number,
       examples include seccomp_rule_add() and seccomp_rule_add_exact().

       In the case of seccomp_syscall_resolve_num_arch() the associated
       syscall name is returned and it remains the callers
       responsibility to free the returned string via free(3).

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_rule_add(ctx, SCMP_ACT_ALLOW,
                                  seccomp_syscall_resolve_name("open"), 0);
            if (rc < 0)
                 goto out;

            /* ... */

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

            /* ... */

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

NOTES         top

       In case of bare syscalls implemented on top of a multiplexed
       syscall, seccomp_syscall_resolve_name() and
       seccomp_syscall_resolve_name_arch() can be used to verify if a
       bare syscall is implemented for a specific architecture, while
       seccomp_syscall_resolve_name_rewrite() can be used to determine
       the underlying multiplexed syscall.

       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_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 2021-06-20.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2021-04-28.)  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            8 May 2014seccomp_syscall_resolve_name(3)

Pages that refer to this page: seccomp_rule_add(3)