mdw@git.distorted.org.uk Git - distorted-chroot/blob - mess/config/schroot/scripts/15binfmt

   1 #!/bin/sh
   2 # Copyright © 2011 Julian Andres Klode <jak@debian.org>
   3 #
   4 # schroot is free software: you can redistribute it and/or modify it
   5 # under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation, either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # schroot is distributed in the hope that it will be useful, but
  10 # WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 # General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see
  16 # <http://www.gnu.org/licenses/>.
  17 #
  18 #####################################################################
  19
  20 set -e
  21
  22 . "$SETUP_DATA_DIR/common-data"
  23 . "$SETUP_DATA_DIR/common-functions"
  24 . "$SETUP_DATA_DIR/common-config"
  25
  26
  27 if [ "$STAGE" != "setup-start" ] && \
  28    [ "$STAGE" != "setup-stop"  ] && \
  29    [ "$STAGE" != "setup-recover" ]; then
  30     exit 0
  31 elif ! which update-binfmts > /dev/null 2>&1; then
  32     info "Missing update-binfmts; not enabling binfmt support"
  33     exit 0
  34 fi
  35
  36 shell="${CHROOT_PATH}/bin/sh"
  37
  38 for emulator in $(update-binfmts --find "$shell"); do
  39     dst="${CHROOT_PATH}$emulator"
  40     if [ ! -e "$emulator" ]; then
  41         info "Missing emulator: $emulator; not enabling binfmt support"
  42     elif [ ! -e "$dst" ]; then
  43         ## [mdw] don't bind over an existing qemu.  Two things go wrong:
  44         ## firstly, and more obviously, this forces the use of the host qemu,
  45         ## which may be too old to run more bleeding-edge code; and secondly,
  46         ## if the chroot's emulator is a symlink to a file in the host
  47         ## filesystem to be bound into the chroot, then this bind mount is
  48         ## never cleaned up.  It's just a bad idea.
  49         touch "$dst"
  50         mount --bind "$emulator" "$dst"
  51         mount -o remount,ro,bind "$dst"
  52     fi
  53 done