mdw@git.distorted.org.uk Git - termux-packages/blob - packages/proot/termux-chroot

   1 #!/bin/sh
   2
   3 SCRIPTNAME=termux-chroot
   4 show_usage () {
   5         echo "Usage: $SCRIPTNAME [command]"
   6         echo "termux-chroot: Setup a chroot to mimic a normal Linux file system"
   7         echo ""
   8         echo "Execute a command in a chroot with traditional file system hierarchy"
   9         echo "(having e.g. the folders /bin, /etc and /usr) within Termux."
  10         echo "If run without argument, the default shell will be executed"
  11         exit 0
  12 }
  13
  14 while getopts :h option
  15 do
  16         case "$option" in
  17                 h) show_usage;;
  18                 ?) echo "$SCRIPTNAME: illegal option -$OPTARG"; exit 1;
  19         esac
  20 done
  21 shift $(($OPTIND-1))
  22
  23 # For the /system/bin/linker(64) to be found:
  24 ARGS="-b /system:/system"
  25
  26 # On some devices /vendor is required for termux packages to work correctly
  27 # See https://github.com/termux/proot/issues/2#issuecomment-303995382
  28 ARGS="$ARGS -b /vendor:/vendor"
  29
  30 # Bind /data to include system folders such as /data/misc. Also $PREFIX
  31 # and $HOME so that Termux programs with hard-coded paths continue to work:
  32 ARGS="$ARGS -b /data:/data"
  33
  34
  35 # Bind Magisk binary directories so root works, closing per Issue #2100.
  36 if [ -d /sbin ] && [ -d /root ]; then
  37         # Both of these directories exist under Android even without Magisk installed,
  38         # The existence check is to ensure that it doesn't break if this changes.
  39         ARGS="$ARGS -b /sbin:/sbin -b /root:/root"
  40 fi
  41
  42 if [ -f /property_contexts ]; then
  43         # Used by getprop (see https://github.com/termux/termux-packages/issues/1076)
  44         # but does not exist on Android 8.
  45         ARGS="$ARGS -b /property_contexts:/property_contexts"
  46 fi
  47
  48 # Expose external and internal storage:
  49 if [ -d /storage ]; then
  50         ARGS="$ARGS -b /storage:/storage"
  51 fi
  52
  53 # Mimic traditional Linux file system hierarchy - /usr:
  54 ARGS="$ARGS -b $PREFIX:/usr"
  55
  56 # Mimic traditional Linux file system hierarchy - other Termux dirs:
  57 for f in bin etc lib share tmp var; do
  58         ARGS="$ARGS -b $PREFIX/$f:/$f"
  59 done
  60
  61 # Mimic traditional Linux file system hierarchy- system dirs:
  62 for f in dev proc; do
  63         ARGS="$ARGS -b /$f:/$f"
  64 done
  65
  66 # Set /home as current directory:
  67 ARGS="$ARGS --cwd=/home"
  68
  69 # Root of the file system:
  70 ARGS="$ARGS -r $PREFIX/.."
  71
  72 export HOME=/home
  73
  74 # Shell to execute:
  75 PROGRAM=/bin/bash
  76 if [ -x $HOME/.termux/shell ]; then
  77         PROGRAM=`readlink -f $HOME/.termux/shell`
  78 fi
  79 # Execute shell if no command has been supplied
  80 if [ -z "$1" ];then
  81         ARGS="$ARGS $PROGRAM -l"
  82         exec $PREFIX/bin/proot $ARGS
  83 else
  84         # When a command is executed directly instead of opening a shell run
  85         # the command in the current working directory instead of in /home
  86         ARGS="$ARGS --cwd=."
  87         # Start supplied command with "sh -c" so things like these work:
  88         # termux-chroot "make;make install"
  89         # termux-chroot "SOME_CONFIG=value ./configure"
  90         exec $PREFIX/bin/proot $ARGS sh -c "$*"
  91 fi