# seccomp_arch_add

## NAME



           seccomp_arch_add, seccomp_arch_remove, seccomp_arch_exist,
           seccomp_arch_native - Manage seccomp filter architectures
    


## SYNOPSIS



           **#include <seccomp.h>**
    
           **typedef void * scmp_filter_ctx;**
    
           **#define SCMP_ARCH_NATIVE**
           **#define SCMP_ARCH_X86**
           **#define SCMP_ARCH_X86_64**
           **#define SCMP_ARCH_X32**
           **#define SCMP_ARCH_ARM**
           **#define SCMP_ARCH_AARCH64**
           **#define SCMP_ARCH_LOONGARCH64**
           **#define SCMP_ARCH_M68K**
           **#define SCMP_ARCH_MIPS**
           **#define SCMP_ARCH_MIPS64**
           **#define SCMP_ARCH_MIPS64N32**
           **#define SCMP_ARCH_MIPSEL**
           **#define SCMP_ARCH_MIPSEL64**
           **#define SCMP_ARCH_MIPSEL64N32**
           **#define SCMP_ARCH_PPC**
           **#define SCMP_ARCH_PPC64**
           **#define SCMP_ARCH_PPC64LE**
           **#define SCMP_ARCH_S390**
           **#define SCMP_ARCH_S390X**
           **#define SCMP_ARCH_SH**
           **#define SCMP_ARCH_SHEB**
           **#define SCMP_ARCH_PARISC**
           **#define SCMP_ARCH_PARISC64**
           **#define SCMP_ARCH_RISCV64**
    
           **uint32_t seccomp_arch_resolve_name(const char ***_arch_name_**);**
           **uint32_t seccomp_arch_native();**
           **int seccomp_arch_exist(const scmp_filter_ctx** _ctx_**, uint32_t** _arch_token_**);**
           **int seccomp_arch_add(scmp_filter_ctx** _ctx_**, uint32_t** _arch_token_**);**
           **int seccomp_arch_remove(scmp_filter_ctx** _ctx_**, uint32_t** _arch_token_**);**
    
           Link with _-lseccomp_.
    


## DESCRIPTION



           The **seccomp_arch_exist**() function tests to see if a given
           architecture has been added to the seccomp filter in _ctx_ , where
           the **seccomp_arch_add**() and **seccomp_arch_remove**() add and remove,
           respectively, architectures from the seccomp filter.  In all three
           functions, the architecture values given in _arch_token_ should be
           the **SCMP_ARCH_*** defined constants; with the **SCMP_ARCH_NATIVE**
           constant always referring to the native compiled architecture.
           The **seccomp_arch_native**() function returns the system's
           architecture such that it will match one of the **SCMP_ARCH_***
           constants.  While the **seccomp_arch_resolve_name**() function also
           returns a **SCMP_ARCH_*** constant, the returned token matches the
           name of the architecture passed as an argument to the function.
    
           When a seccomp filter is initialized with the call to
           seccomp_init(3) the native architecture is automatically added to
           the filter.
    
           While it is possible to remove all architectures from a filter,
           most of the libseccomp APIs will fail if the filter does not
           contain at least one architecture.
    
           When adding a new architecture to an existing filter, the existing
           rules will not be added to the new architecture.  However, rules
           added after adding the new architecture will be added to all of
           the architectures in the filter.
    


## RETURN VALUE



           The **seccomp_arch_add**(), **seccomp_arch_remove**(), and
           **seccomp_arch_exist**() functions return zero on success or one of
           the following error codes on failure:
    
           **-EDOM** Architecture specific failure.
    
           **-EEXIST**
                  In the case of **seccomp_arch_add**() the architecture already
                  exists and in the case of **seccomp_arch_remove**() the
                  architecture does not exist.
    
           **-EINVAL**
                  Invalid input, either the context or architecture token is
                  invalid.
    
           **-ENOMEM**
                  The library was unable to allocate enough memory.
    


## 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;
    
                if (seccomp_arch_exist(ctx, SCMP_ARCH_X86) == -EEXIST) {
                     rc = seccomp_arch_add(ctx, SCMP_ARCH_X86);
                     if (rc != 0)
                          goto out_all;
                     rc = seccomp_arch_remove(ctx, SCMP_ARCH_NATIVE);
                     if (rc != 0)
                          goto out_all;
                }
    
                /* ... */
    
           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.
    


* * *