* Der Kernel soll beim booten die email-Adresse info@freifunk-bielefeld.de anzeigen anstatt user@hostname vom eigenen System. Dafür müssen zwei Wrapper unter /usr/local/bin erstellt werden:

/usr/local/bin/whoami

  #!/bin/sh
  
  # username to return to the kernel build scripts/mkcompile_h
  LINUX_COMPILE_BY="info"
  
  # get the current path and remove the directory containing this script so the real
  # command can be called and its output filtered
  DIRNAME=$(dirname $0)
  NEWPATH=$(IFS=:; for dir in $PATH; do if [ "$dir" != "$DIRNAME" ]; then echo -n "${dir}:"; fi; done)
  
  # calling process ID, required to see if it is the kernel build calling or not
  if ps -p $PPID -o args= | grep -q mkcompile_h; then
    echo $LINUX_COMPILE_BY
    exit 0
  fi
  
  # execute the system command otherwise
  PATH=$NEWPATH whoami "$@"

/usr/local/bin/hostname

  #!/bin/sh
  
  # username to return to the kernel build scripts/mkcompile_h
  LINUX_COMPILE_HOST="freifunk-bielefeld.de"
  
  # get the current path and remove the directory containing this script so the real
  # command can be called and its output filtered
  DIRNAME=$(dirname $0)
  NEWPATH=$(IFS=:; for dir in $PATH; do if [ "$dir" != "$DIRNAME" ]; then echo -n "${dir}:"; fi; done)
  
  # calling process ID, required to see if it is the kernel build calling or not
  if ps -p $PPID -o args= | grep -q mkcompile_h; then 
    echo $LINUX_COMPILE_HOST
    exit 0
  fi
  
  # execute the system command otherwise
  PATH=$NEWPATH hostname
  
Zuletzt noch beide Dateien ausführbar machen:

  chmod a+x /usr/local/bin/whoami
  chmod a+x /usr/local/bin/hostname
  
Jetzt das OpenWRT-Image bauen. :-)


Quelle: http://tjworld.net/wiki/Linux/Kernel/Build/CustomiseVersionString