.bin/custom-chroot

   1 !/bin/bash -e
   2
   3 [[ -w / ]] || exec sudo "$0" "$@"
   4 [[ $# -eq 0 ]] && set -- /bin/bash -l
   5 mounts="proc sys dev dev/pts"
   6
   7 chroot=${0%/*}
   8 cd "${chroot}"
   9
  10 maybe_mount() {
  11         local src=$1 dst=${2:-$1}
  12         mkdir -p $d/$m
  13         grep -sq "${chroot}/${dst}" /proc/mounts || mount --bind "/${src}" "${chroot}/${dst}"
  14 }
  15 for m in ${mounts} ; do
  16         maybe_mount ${m}
  17 done
  18
  19 get_type() {
  20         case $(file "$1") in
  21                 *x86-64*)        echo x86_64;;
  22                 *"Intel 80386"*) echo i386;;
  23         esac
  24 }
  25 bin_dst=$(get_type bin/bash)
  26 bin_src=$(get_type /bin/bash)
  27 if [[ ${bin_dst} == ${bin_src} ]] ; then
  28         setarch=
  29 else
  30         setarch="setarch ${bin_dst}"
  31 fi
  32
  33 if [[ ! -L /etc/mtab ]] ; then
  34         rm -f etc/mtab
  35         ln -sf /proc/mounts etc/mtab
  36 fi
  37 etc="
  38         hosts
  39         locale.gen
  40         localtime
  41         resolv.conf
  42 "
  43 root="
  44         .inputrc
  45         .nanorc
  46 "
  47 for f in \
  48         $(printf 'etc/%s ' ${etc}) \
  49         $(printf 'root/%s ' ${root}) \
  50 ; do
  51         cp /${f} ${f}
  52 done
  53
  54 unset LS_COLORS # format changes over time
  55 exec ${setarch} chroot "${chroot}" "$@"