You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: dhcpc.rs
    path of file: ./repos/rustybox/networking/udhcp
    
    the code of the file until where you have to start completion: use crate::libbb::appletlib::applet_name;
use crate::libbb::llist::llist_t;
use crate::libbb::ptr_to_globals::bb_errno;
use crate::libbb::xfuncs_printf::xmalloc;
use crate::librb::size_t;
use crate::librb::smallint;
use crate::librb::socklen_t;
use crate::networking::udhcp::common::dhcp_packet;
use c2rust_asm_casts;
use c2rust_asm_casts::AsmCastTrait;
use c2rust_bitfields;
use c2rust_bitfields::BitfieldStruct;
use li
    
unsafe extern "C" fn client_background() {
  crate::libbb::vfork_daemon_rexec::bb_daemonize_or_rexec(0i32);
  logmode = (logmode as libc::c_int & !(LOGMODE_STDIO as libc::c_int)) as smallint;
  /* rewrite pidfile, as our pid is different now */
  crate::libbb::pidfile::write_pidfile(
    (*(&mut *bb_common_bufsiz1
      .as_mut_ptr()
      .offset((COMMON_BUFSIZE as libc::c_int / 2i32) as isize) as *mut libc::c_char
      as *mut client_data_t))
      .pidfile,
  );
}