enter-chroot

   1 #! /bin/sh -
   2 # Copyright (c) 2016-2018 Matias Fonzo, <selk@dragora.org>.
   3 # Copyright (c) 2020 Matias Fonzo, <selk@dragora.org>.
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #    http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 PROGRAM="${0##*/}"
  18
  19 # Exit immediately on any error
  20 set -e
  21
  22 # Override locale settings
  23 LC_ALL=C
  24 export LC_ALL
  25
  26 # Get current working directory
  27 CWD="$(dirname -- "$0")"
  28
  29 # Functions
  30 unmountSeries()
  31 {
  32     for node in "${rootdir}/usr/src/qi/archive" \
  33                 "${rootdir}/usr/src/qi/patches" \
  34                 "${rootdir}/usr/src/qi/recipes" \
  35                 "${rootdir}/usr/src/qi/sources" \
  36                 "${rootdir}/sys" \
  37                 "${rootdir}/proc" \
  38                 "${rootdir}/dev/pts" \
  39                 "${rootdir}/dev" ; \
  40     do
  41         if mount | grep -q "$node"
  42         then
  43             echo "Unmounting ${node} ..."
  44             if ! umount "$node"
  45             then
  46                 echo "Doing a lazy unmount for $node ..."
  47                 umount -l "$node"
  48             fi
  49         fi
  50     done
  51     unset node
  52 }
  53
  54 # Autodetermine the path of /tools
  55
  56 if test ! -L /tools
  57 then
  58     echo "${PROGRAM}: cannot determine ${rootdir}: /tools does not exist as symlink" 1>&2
  59     exit 1
  60 fi
  61 if test -L /tools -a ! -e /tools
  62 then
  63     echo "${PROGRAM}: cannot access /tools: Dangling symlink" 1>&2
  64     exit 1
  65 fi
  66
  67 # Set canonical name to compose the root directory, removing
  68 # the last component from the path name "/tools"
  69
  70 rootdir="$(CDPATH='' cd -P -- /tools && pwd -P)"
  71 rootdir="${rootdir%/*}"
  72
  73 # Unmount directories and file systems before the next mounting
  74
  75 unmountSeries
  76
  77 # Create required directory for destination
  78 mkdir -p -- "${rootdir}/dev"                 \
  79             "${rootdir}/dev/pts"             \
  80             "${rootdir}/proc"                \
  81             "${rootdir}/sys"                 \
  82             "${rootdir}/usr/src/qi/archive"  \
  83             "${rootdir}/usr/src/qi/patches"  \
  84             "${rootdir}/usr/src/qi/recipes"  \
  85             "${rootdir}/usr/src/qi/sources"
  86
  87 echo "Mounting virtual file systems ..."
  88 mount -o bind /dev      "${rootdir}/dev"
  89 mount -t devpts devpts  "${rootdir}/dev/pts"
  90 mount -t proc proc      "${rootdir}/proc"
  91 mount -t sysfs sysfs    "${rootdir}/sys"
  92
  93 echo "Binding directories to mount: archive, patches, recipes, sources ..."
  94 mount -o bind "${CWD}/archive" "${rootdir}/usr/src/qi/archive"
  95 mount -o bind "${CWD}/patches" "${rootdir}/usr/src/qi/patches"
  96 mount -o bind "${CWD}/recipes" "${rootdir}/usr/src/qi/recipes"
  97 mount -o bind "${CWD}/sources" "${rootdir}/usr/src/qi/sources"
  98
  99 # Change reported architecture for an appropriate environment
 100 _machine_type=""
 101
 102 if file /tools/bin/busybox | grep -q "32-bit"
 103 then
 104     echo "Using the linux32 command for this machine type: $(uname -m) ..."
 105     if command -v linux32 > /dev/null
 106     then
 107         _machine_type="linux32"
 108     else
 109         echo "    The linux32 command is not available on your system." 1>&2
 110     fi
 111 fi
 112
 113 # Add trap for unmount the series, signalled or not
 114 trap 'echo ""; unmountSeries' EXIT HUP QUIT ABRT TERM
 115
 116 echo "Entering via chroot $rootdir ..."
 117 $_machine_type chroot "$rootdir" /tools/bin/env -i \
 118   PATH=/bin:/usr/bin:/sbin:/usr/sbin:/tools/bin:/opt/trinity/bin \
 119   SHELL=/bin/sh \
 120   HOME=/root \
 121   TERM=linux \
 122   HOSTNAME=dragora \
 123   LC_ALL=C \
 124   PKG_CONFIG=/usr/bin/pkgconf \
 125   PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:/usr/local/share/pkgconfig:/usr/lib/pkgconfig:/usr/share/pkgconfig:/opt/trinity/lib/pkgconfig \
 126   QTDIR=/opt/trinity/lib/tqt3 \
 127  /bin/sh -
 128