Function svn_client_get_wc_root 

pub unsafe extern "C" fn svn_client_get_wc_root(
    wcroot_abspath: *mut *const c_char,
    local_abspath: *const c_char,
    ctx: *mut svn_client_ctx_t,
    result_pool: *mut apr_pool_t,
    scratch_pool: *mut apr_pool_t,
) -> *mut svn_error_t

Set @a *wcroot_abspath to the local abspath of the root of the working copy in which @a local_abspath resides.

@since New in 1.7.