mdw@git.distorted.org.uk Git - distorted-chroot/blob - bin/update-cross-tools

   1 #! /bin/sh -e
   2 ###
   3 ### Fetch native versions of tools for insertion into foreign chroots
   4 ###
   5 ### (c) 2018 Mark Wooding
   6 ###
   7
   8 ###----- Licensing notice ---------------------------------------------------
   9 ###
  10 ### This file is part of the distorted.org.uk chroot maintenance tools.
  11 ###
  12 ### distorted-chroot is free software: you can redistribute it and/or
  13 ### modify it under the terms of the GNU General Public License as
  14 ### published by the Free Software Foundation; either version 2 of the
  15 ### License, or (at your option) any later version.
  16 ###
  17 ### distorted-chroot is distributed in the hope that it will be useful,
  18 ### but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 ### MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  20 ### General Public License for more details.
  21 ###
  22 ### You should have received a copy of the GNU General Public License
  23 ### along with distorted-chroot.  If not, write to the Free Software
  24 ### Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  25 ### USA.
  26
  27 . state/config.sh # @@@config@@@
  28
  29 ###--------------------------------------------------------------------------
  30 ### Utilities.
  31
  32 chase_link () {
  33   p=$1 d=
  34   ## Copy an absolute path P from the donor tree `$root/' into the
  35   ## cross-tools tree `$crossnew/'.  If resolving P involves traversing a
  36   ## symbolic link, then ensure that the pieces of filesystem it directs us
  37   ## to are also copied.
  38
  39   ## Work through the remaining components of the path.
  40   while :; do
  41
  42     ## Analyse the first remaining component of the path P.
  43     case $p in
  44
  45       ## It's empty.  We're done.
  46       "") break ;;
  47
  48       ## A redundant `/' or `./'.  Skip it.
  49       "/"*) p=${p#/} ;;
  50       "./"*) p=${p#./} ;;
  51
  52       ## A `../'.  Strip off the trailing component of D.
  53       "../"*)
  54         p=${p#../}
  55         case $d in */*) d=${d%/*} ;; *) d= ;; esac
  56         ;;
  57
  58       ## Something else.  Transfer the component name to D.
  59       *)
  60         case $p in */*) f=${p%%/*} p=${p#*/} ;; *) f=$p p="" ;; esac
  61         d=${d:+$d/}$f
  62         ;;
  63     esac
  64
  65     ## If D doesn't refer to a file in the cross-tools tree, then maybe it
  66     ## refers to something in the donor tree.  Find out what, and copy it
  67     ## into the cross-tools tree.
  68     if ! [ -e "$crossnew$d" ] && ! [ -L "$crossnew$d" ]; then
  69       if [ -d "$root/$d" ] && ! [ -L "$root/$d" ]; then
  70         mkdir "$crossnew$d"
  71       else
  72         echo >&2 "$0: copy /$d to satisfy symlinks"
  73         rsync -aHR $root/./$d $crossnew
  74       fi
  75     fi
  76
  77     ## If D refers to a symbolic link, then append the link target to P, so
  78     ## that we can make sure we copy the target.
  79     if [ -L "$crossnew$d" ]; then
  80       t=$(readlink "$crossnew$d")
  81       case $t in /*) t=${t#/} d= ;; esac
  82       case $d in */*) d=${d%/*} ;; *) d= ;; esac
  83       p=$t${p:+/$p}
  84     fi
  85   done
  86 }
  87
  88 ###--------------------------------------------------------------------------
  89 ### Main program.
  90
  91 ## Parse the command line.
  92 badp=nil
  93 case $# in 2) ;; *) badp=t ;; esac
  94 case $badp in t) echo >&2 "usage: $0 DIST MYARCH"; exit 2 ;; esac
  95 d=$1 myarch=$2
  96
  97 ## Keep track of our original stdout.
  98 exec 3>&1
  99
 100 ## Figure out derived architecture names.
 101 mymulti=$(dpkg-architecture -a$myarch -qDEB_HOST_MULTIARCH)
 102
 103 ## First, set `cross_archs' as a list of GNUish names for our supported
 104 ## foreign architectures.
 105 cross_archs="arm-linux-gnueabi arm-linux-gnueabihf aarch64-linux-gnu"
 106
 107 ## Make a list of extra packages we'll need to install to obtain our tools.
 108 cross_pkgs="
 109         apt bash ccache coreutils dash eatmydata fakeroot findutils
 110         gpgv gzip m4 make mawk qemu-user-static sed tar xz-utils"
 111 for a in $cross_archs; do
 112   for i in gcc g++ binutils; do
 113     cross_pkgs="$cross_pkgs $i-$a"
 114   done
 115 done
 116 cross_pkgs=$(echo $cross_pkgs)
 117
 118 ## Make an enormous shopping list of paths.
 119 ##
 120 ## The `wanted' list consists of two kinds of items: an absolute path names a
 121 ## prefix (not necessarily a directory name) to be attached to the following
 122 ## relative names, up to the end of the list or the next absolute path.
 123 wanted="
 124         /usr/bin/ apt apt-cache apt-config apt-get apt-key apt-mark
 125         /usr/lib/apt/ methods/ solvers/
 126
 127         /bin/ cat chgrp chown cp date dd df dir echo false ln ls mkdir
 128                 mknod mktemp mv pwd readlink rm rmdir sleep stty sync touch
 129                 true uname vdir
 130         /usr/bin/ [ arch b2sum base32 base64 basename chcon cksum comm
 131                 csplit cut dircolors dirname du env expand expr factor fmt
 132                 fold groups head hostid id install join link logname md5sum
 133                 mkfifo nice nl nohup nproc numfmt od paste pathchk pinky pr
 134                 printenv printf ptx realpath runcon seq sha1sum sha224sum
 135                 sha256sum sha384sum sha512sum shred shuf sort split stat
 136                 stdbuf sum tac tail tee test timeout tr truncate tsort tty
 137                 unexpand uniq unlink users wc who whoami yes
 138         /usr/lib/$mymulti/ coreutils/
 139
 140         /lib/$mymulti/ libnss_*.so.*
 141
 142         /usr/bin/ gpgv
 143
 144         /usr/bin/ qemu-*-static
 145
 146         /bin/ bash dash gzip sed tar
 147         /usr/bin/ ccache find m4 make mawk xargs xz
 148         /usr/lib/$mymulti/ libeatmydata.so* libfakeroot/
 149
 150         /etc/ld.so.conf.d/ $mymulti.conf fakeroot*.conf"
 151
 152 for a in $cross_archs; do
 153   wanted="$wanted
 154
 155         /usr/bin/$a- addr2line ar as c++filt dwp elfedit gprof ld ld.*
 156                 nm objcopy objdump ranlib readelf size strings strip
 157
 158         /usr/bin/$a- cpp gcc g++ gcov gcov-dump gcov-tool gprof
 159                 gcc-ar gcc-nm gcc-ranlib
 160         /usr/lib/gcc-cross/$a/ ..."
 161 done
 162 wanted=$(echo $wanted)
 163
 164 ## Figure out how to recognize dynamic executables.
 165 case $myarch in
 166   i386) elfsig=7f454c46010101??0000000000000000????0300 ;;
 167   amd64) elfsig=7f454c46020101??0000000000000000????3e00 ;;
 168   *) echo >&2 "$0: unsupported local arch \`$myarch'"; exit 2 ;;
 169 esac
 170
 171 ## Open a session to the donor chroot.
 172 echo >&2 "$0: create $d snapshot"
 173 sess=$(schroot -bc$LVPREFIX$d-$myarch 3>&-)
 174
 175 ## Make sure the donor tree is up-to-date, and install the extra packages we
 176 ## need.
 177 schroot -uroot -rc$sess -- eatmydata sh -ec "
 178         apt-get update
 179         apt-get -y upgrade
 180         apt-get -y install $cross_pkgs"
 181
 182 ## Establish some pathnames.  Prepare a place for our cross-tools tree.
 183 crossdir=$LOCAL/cross/$d-$myarch/
 184 crossold=${crossdir%/}.old/ crossnew=${crossdir%/}.new/
 185 root=/schroot/$sess/fs
 186 rm -rf $crossnew; mkdir -p $crossnew
 187
 188 ## Work through the shopping list, copying the things it names into the
 189 ## cross-tools tree.
 190 dir=/
 191 for i in $wanted; do
 192   case $i in
 193     /*)
 194       dir=$i
 195       ;;
 196     *)
 197       case $i in ...) f=$dir ;; *) f=$dir$i ;; esac
 198       echo >&2 "$0: copy $f"
 199       rsync -aHR $root/.$f $crossnew
 200       ;;
 201   esac
 202 done
 203
 204 ## Chase links in the new tree, copying extra stuff that we'll need.
 205 find $crossnew -xtype l -print | while read i; do
 206   chase_link ${i#$crossnew}
 207 done
 208
 209 ## Search the new tree for ELF binaries, and build a list of them in
 210 ## `QUEUE.in'.
 211 find $crossnew -type f -print | while read i; do
 212   sig=$(head -c20 "$i" | bincode -e -m0 -flowerc hex)
 213   case $sig in $elfsig) echo "$i" ;; esac
 214 done >$root/private/QUEUE.in
 215
 216 while [ -s $root/private/QUEUE.in ]; do
 217   ## Work through the ELF binaries in `QUEUE.in', determining which shared
 218   ## libraries they'll need.  Write the list of dependencies to `QUEUE.out'
 219   schroot -uroot -rc$sess -- eatmydata sh -ec '
 220         prog=$1
 221         while read i; do
 222         echo >&2 "$prog: scanning binary $i"
 223           ldd "$i" | while read a b c d; do
 224             case $a:$b:$c:$d in
 225               not:a:dynamic:executable) ;;
 226               statically:linked::) ;;
 227               /*) echo "$a" ;;
 228               *:=\>:/*) echo "$c" ;;
 229               linux-*) ;;
 230               *) echo >&2 "$i: unable to find $a"; exit 2 ;;
 231             esac
 232           done
 233         done </private/QUEUE.in >/private/QUEUE.out' - "$0"
 234
 235   ## Work through the shared libraries in `QUEUE.out', copying them to the
 236   ## cross-tools tree if they're not there already.  Add the new ones to a
 237   ## new `QUEUE.in' file to scan them in turn.
 238   while read i; do
 239     if [ -e "$crossnew$i" ] || [ -L "$crossnew$i" ]
 240     then continue; fi
 241     if [ -d "$root$i" ]; then continue; fi
 242     echo >&2 "$0: copy $i"
 243     rsync -aHR $root/.$i $crossnew >&3
 244     chase_link $i >&3
 245     sig=$(head -c20 $crossnew$i | bincode -e -m0 -flowerc hex)
 246     case $sig in $elfsig) echo "$i" ;; esac
 247   done <$root/private/QUEUE.out >$root/private/QUEUE.in
 248 done
 249
 250 ## Set up the cross-compiler.  This is rather hairy.
 251 echo >&2 "$0: establish TOOLCHAIN"
 252 for a in $cross_archs; do
 253   tooldir=$crossnew/TOOLCHAIN/$a
 254   mkdir -p $tooldir
 255   for i in $crossnew/usr/bin/$a-*; do
 256     t=${i#$crossnew/usr/bin/}
 257     mv $i $tooldir/$t
 258     ln -s $t $tooldir/${t#$a-}
 259   done
 260 done
 261 mkdir $crossnew/TOOLCHAIN/lib
 262 ln -s ../../usr/lib/gcc-cross $crossnew/TOOLCHAIN/lib/
 263
 264 ## Set up the emulator.
 265 echo >&2 "$0: establish QEMU"
 266 mkdir $crossnew/QEMU
 267 mv $crossnew/usr/bin/qemu-*-static $crossnew/QEMU/
 268
 269 ## We're done.  Remove the snapshot, and replace the old cross-tools tree
 270 ## with our new one.
 271 echo >&2 "$0: remove snapshot"
 272 schroot -ec$sess 3>&-
 273 if [ -d $crossdir ]; then mv $crossdir $crossold; fi
 274 mv $crossnew $crossdir; rm -rf $crossold
 275 echo >&2 "$0: committed $crossdir"
 276
 277 ###----- That's all, folkd --------------------------------------------------