build/install-chroot.sh

   1 #!/bin/bash -e
   2
   3 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
   4 # Use of this source code is governed by a BSD-style license that can be
   5 # found in the LICENSE file.
   6
   7 # This script installs Debian-derived distributions in a chroot environment.
   8 # It can for example be used to have an accurate 32bit build and test
   9 # environment when otherwise working on a 64bit machine.
  10 # N. B. it is unlikely that this script will ever work on anything other than a
  11 # Debian-derived system.
  12
  13 # Older Debian based systems had both "admin" and "adm" groups, with "admin"
  14 # apparently being used in more places. Newer distributions have standardized
  15 # on just the "adm" group. Check /etc/group for the prefered name of the
  16 # administrator group.
  17 admin=$(grep '^admin:' /etc/group >&/dev/null && echo admin || echo adm)
  18
  19 usage() {
  20   echo "usage: ${0##*/} [-m mirror] [-g group,...] [-s] [-c]"
  21   echo "-b dir       additional directories that should be bind mounted,"
  22   echo '             or "NONE".'
  23   echo "             Default: if local filesystems present, ask user for help"
  24   echo "-g group,... groups that can use the chroot unauthenticated"
  25   echo "             Default: '${admin}' and current user's group ('$(id -gn)')"
  26   echo "-l           List all installed chroot environments"
  27   echo "-m mirror    an alternate repository mirror for package downloads"
  28   echo "-s           configure default deb-srcs"
  29   echo "-c           always copy 64bit helper binaries to 32bit chroot"
  30   echo "-h           this help message"
  31 }
  32
  33 process_opts() {
  34   local OPTNAME OPTIND OPTERR OPTARG
  35   while getopts ":b:g:lm:sch" OPTNAME; do
  36     case "$OPTNAME" in
  37       b)
  38         if [ "${OPTARG}" = "NONE" -a -z "${bind_mounts}" ]; then
  39           bind_mounts="${OPTARG}"
  40         else
  41           if [ "${bind_mounts}" = "NONE" -o "${OPTARG}" = "${OPTARG#/}" -o \
  42                ! -d "${OPTARG}" ]; then
  43             echo "Invalid -b option(s)"
  44             usage
  45             exit 1
  46           fi
  47           bind_mounts="${bind_mounts}
  48 ${OPTARG} ${OPTARG} none rw,bind 0 0"
  49         fi
  50         ;;
  51       g)
  52         [ -n "${OPTARG}" ] &&
  53           chroot_groups="${chroot_groups}${chroot_groups:+,}${OPTARG}"
  54         ;;
  55       l)
  56         list_all_chroots
  57         exit
  58         ;;
  59       m)
  60         if [ -n "${mirror}" ]; then
  61           echo "You can only specify exactly one mirror location"
  62           usage
  63           exit 1
  64         fi
  65         mirror="$OPTARG"
  66         ;;
  67       s)
  68         add_srcs="y"
  69         ;;
  70       c)
  71         copy_64="y"
  72         ;;
  73       h)
  74         usage
  75         exit 0
  76         ;;
  77       \:)
  78         echo "'-$OPTARG' needs an argument."
  79         usage
  80         exit 1
  81         ;;
  82       *)
  83         echo "invalid command-line option: $OPTARG"
  84         usage
  85         exit 1
  86         ;;
  87     esac
  88   done
  89
  90   if [ $# -ge ${OPTIND} ]; then
  91     eval echo "Unexpected command line argument: \${${OPTIND}}"
  92     usage
  93     exit 1
  94   fi
  95 }
  96
  97 list_all_chroots() {
  98   for i in /var/lib/chroot/*; do
  99     i="${i##*/}"
 100     [ "${i}" = "*" ] && continue
 101     [ -x "/usr/local/bin/${i%bit}" ] || continue
 102     grep -qs "^\[${i%bit}\]\$" /etc/schroot/schroot.conf || continue
 103     [ -r "/etc/schroot/script-${i}" -a \
 104       -r "/etc/schroot/mount-${i}" ] || continue
 105     echo "${i%bit}"
 106   done
 107 }
 108
 109 getkey() {
 110   (
 111     trap 'stty echo -iuclc icanon 2>/dev/null' EXIT INT TERM QUIT HUP
 112     stty -echo iuclc -icanon 2>/dev/null
 113     dd count=1 bs=1 2>/dev/null
 114   )
 115 }
 116
 117 chr() {
 118   printf "\\$(printf '%03o' "$1")"
 119 }
 120
 121 ord() {
 122   printf '%d' $(printf '%c' "$1" | od -tu1 -An)
 123 }
 124
 125 is_network_drive() {
 126   stat -c %T -f "$1/" 2>/dev/null |
 127     egrep -qs '^nfs|cifs|smbfs'
 128 }
 129
 130 # Check that we are running as a regular user
 131 [ "$(id -nu)" = root ] && {
 132   echo "Run this script as a regular user and provide your \"sudo\""           \
 133        "password if requested" >&2
 134   exit 1
 135 }
 136
 137 process_opts "$@"
 138
 139 echo "This script will help you through the process of installing a"
 140 echo "Debian or Ubuntu distribution in a chroot environment. You will"
 141 echo "have to provide your \"sudo\" password when requested."
 142 echo
 143
 144 # Error handler
 145 trap 'exit 1' INT TERM QUIT HUP
 146 trap 'sudo apt-get clean; tput bel; echo; echo Failed' EXIT
 147
 148 # Install any missing applications that this script relies on. If these packages
 149 # are already installed, don't force another "apt-get install". That would
 150 # prevent them from being auto-removed, if they ever become eligible for that.
 151 # And as this script only needs the packages once, there is no good reason to
 152 # introduce a hard dependency on things such as dchroot and debootstrap.
 153 dep=
 154 for i in dchroot debootstrap libwww-perl; do
 155   [ -d /usr/share/doc/"$i" ] || dep="$dep $i"
 156 done
 157 [ -n "$dep" ] && sudo apt-get -y install $dep
 158 sudo apt-get -y install schroot
 159
 160 # Create directory for chroot
 161 sudo mkdir -p /var/lib/chroot
 162
 163 # Find chroot environments that can be installed with debootstrap
 164 targets="$(cd /usr/share/debootstrap/scripts
 165            ls | grep '^[a-z]*$')"
 166
 167 # Ask user to pick one of the available targets
 168 echo "The following targets are available to be installed in a chroot:"
 169 j=1; for i in $targets; do
 170   printf '%4d: %s\n' "$j" "$i"
 171   j=$(($j+1))
 172 done
 173 while :; do
 174   printf "Which target would you like to install: "
 175   read n
 176   [ "$n" -gt 0 -a "$n" -lt "$j" ] >&/dev/null && break
 177 done
 178 j=1; for i in $targets; do
 179   [ "$j" -eq "$n" ] && { distname="$i"; break; }
 180   j=$(($j+1))
 181 done
 182 echo
 183
 184 # On x86-64, ask whether the user wants to install x86-32 or x86-64
 185 archflag=
 186 arch=
 187 if [ "$(uname -m)" = x86_64 ]; then
 188   while :; do
 189     echo "You are running a 64bit kernel. This allows you to install either a"
 190     printf "32bit or a 64bit chroot environment. %s"                           \
 191            "Which one do you want (32, 64) "
 192     read arch
 193     [ "${arch}" == 32 -o "${arch}" == 64 ] && break
 194   done
 195   [ "${arch}" == 32 ] && archflag="--arch i386" || archflag="--arch amd64"
 196   arch="${arch}bit"
 197   echo
 198 fi
 199 target="${distname}${arch}"
 200
 201 # Don't accidentally overwrite an existing installation
 202 [ -d /var/lib/chroot/"${target}" ] && {
 203   while :; do
 204     echo "This chroot already exists on your machine."
 205     if schroot -l --all-sessions 2>&1 |
 206        sed 's/^session://' |
 207        grep -qs "^${target%bit}-"; then
 208       echo "And it appears to be in active use. Terminate all programs that"
 209       echo "are currently using the chroot environment and then re-run this"
 210       echo "script."
 211       echo "If you still get an error message, you might have stale mounts"
 212       echo "that you forgot to delete. You can always clean up mounts by"
 213       echo "executing \"${target%bit} -c\"."
 214       exit 1
 215     fi
 216     echo "I can abort installation, I can overwrite the existing chroot,"
 217     echo "or I can delete the old one and then exit. What would you like to"
 218     printf "do (a/o/d)? "
 219     read choice
 220     case "${choice}" in
 221       a|A) exit 1;;
 222       o|O) sudo rm -rf "/var/lib/chroot/${target}"; break;;
 223       d|D) sudo rm -rf "/var/lib/chroot/${target}"      \
 224                        "/usr/local/bin/${target%bit}"   \
 225                        "/etc/schroot/mount-${target}"   \
 226                        "/etc/schroot/script-${target}"
 227            sudo sed -ni '/^[[]'"${target%bit}"']$/,${
 228                          :1;n;/^[[]/b2;b1;:2;p;n;b2};p' \
 229                        "/etc/schroot/schroot.conf"
 230            trap '' INT TERM QUIT HUP
 231            trap '' EXIT
 232            echo "Deleted!"
 233            exit 0;;
 234     esac
 235   done
 236   echo
 237 }
 238 sudo mkdir -p /var/lib/chroot/"${target}"
 239
 240 # Offer to include additional standard repositories for Ubuntu-based chroots.
 241 alt_repos=
 242 grep -qs ubuntu.com /usr/share/debootstrap/scripts/"${distname}" && {
 243   while :; do
 244     echo "Would you like to add ${distname}-updates and ${distname}-security "
 245     printf "to the chroot's sources.list (y/n)? "
 246     read alt_repos
 247     case "${alt_repos}" in
 248       y|Y)
 249         alt_repos="y"
 250         break
 251       ;;
 252       n|N)
 253         break
 254       ;;
 255     esac
 256   done
 257   echo
 258 }
 259
 260 # Check for non-standard file system mount points and ask the user whether
 261 # they should be imported into the chroot environment
 262 # We limit to the first 26 mount points that much some basic heuristics,
 263 # because a) that allows us to enumerate choices with a single character,
 264 # and b) if we find more than 26 mount points, then these are probably
 265 # false-positives and something is very unusual about the system's
 266 # configuration. No need to spam the user with even more information that
 267 # is likely completely irrelevant.
 268 if [ -z "${bind_mounts}" ]; then
 269   mounts="$(awk '$2 != "/" && $2 !~ "^/boot" && $2 !~ "^/home" &&
 270                  $2 !~ "^/media" && $2 !~ "^/run" &&
 271                  ($3 ~ "ext[2-4]" || $3 == "reiserfs" || $3 == "btrfs" ||
 272                  $3 == "xfs" || $3 == "jfs" || $3 == "u?msdos" ||
 273                  $3 == "v?fat" || $3 == "hfs" || $3 == "ntfs" ||
 274                  $3 ~ "nfs[4-9]?" || $3 == "smbfs" || $3 == "cifs") {
 275                    print $2
 276                  }' /proc/mounts |
 277             head -n26)"
 278   if [ -n "${mounts}" ]; then
 279     echo "You appear to have non-standard mount points that you"
 280     echo "might want to import into the chroot environment:"
 281     echo
 282     sel=
 283     while :; do
 284       # Print a menu, listing all non-default mounts of local or network
 285       # file systems.
 286       j=1; for m in ${mounts}; do
 287         c="$(printf $(printf '\\%03o' $((64+$j))))"
 288         echo "$sel" | grep -qs $c &&
 289           state="mounted in chroot" || state="$(tput el)"
 290         printf "   $c) %-40s${state}\n" "$m"
 291         j=$(($j+1))
 292       done
 293       # Allow user to interactively (de-)select any of the entries
 294       echo
 295       printf "Select mount points that you want to be included or press %s" \
 296              "SPACE to continue"
 297       c="$(getkey | tr a-z A-Z)"
 298       [ "$c" == " " ] && { echo; echo; break; }
 299       if [ -z "$c" ] ||
 300          [ "$c" '<' 'A' -o $(ord "$c") -gt $((64 + $(ord "$j"))) ]; then
 301           # Invalid input, ring the console bell
 302           tput bel
 303       else
 304         # Toggle the selection for the given entry
 305         if echo "$sel" | grep -qs $c; then
 306           sel="$(printf "$sel" | sed "s/$c//")"
 307         else
 308           sel="$sel$c"
 309         fi
 310       fi
 311       # Reposition cursor to the top of the list of entries
 312       tput cuu $(($j + 1))
 313       echo
 314     done
 315   fi
 316   j=1; for m in ${mounts}; do
 317     c="$(chr $(($j + 64)))"
 318     if echo "$sel" | grep -qs $c; then
 319       bind_mounts="${bind_mounts}$m $m none rw,bind 0 0
 320 "
 321     fi
 322     j=$(($j+1))
 323   done
 324 fi
 325
 326 # Remove stale entry from /etc/schroot/schroot.conf. Entries start
 327 # with the target name in square brackets, followed by an arbitrary
 328 # number of lines. The entry stops when either the end of file has
 329 # been reached, or when the beginning of a new target is encountered.
 330 # This means, we cannot easily match for a range of lines in
 331 # "sed". Instead, we actually have to iterate over each line and check
 332 # whether it is the beginning of a new entry.
 333 sudo sed -ni '/^[[]'"${target%bit}"']$/,${:1;n;/^[[]/b2;b1;:2;p;n;b2};p'       \
 334          /etc/schroot/schroot.conf
 335
 336 # Download base system. This takes some time
 337 if [ -z "${mirror}" ]; then
 338  grep -qs ubuntu.com /usr/share/debootstrap/scripts/"${distname}" &&
 339    mirror="http://archive.ubuntu.com/ubuntu" ||
 340    mirror="http://ftp.us.debian.org/debian"
 341 fi
 342
 343 sudo ${http_proxy:+http_proxy="${http_proxy}"} debootstrap ${archflag} \
 344     "${distname}" "/var/lib/chroot/${target}"  "$mirror"
 345
 346 # Add new entry to /etc/schroot/schroot.conf
 347 grep -qs ubuntu.com /usr/share/debootstrap/scripts/"${distname}" &&
 348   brand="Ubuntu" || brand="Debian"
 349 if [ -z "${chroot_groups}" ]; then
 350   chroot_groups="${admin},$(id -gn)"
 351 fi
 352 # Older versions of schroot wanted a "priority=" line, whereas recent
 353 # versions deprecate "priority=" and warn if they see it. We don't have
 354 # a good feature test, but scanning for the string "priority=" in the
 355 # existing "schroot.conf" file is a good indication of what to do.
 356 priority=$(grep -qs 'priority=' /etc/schroot/schroot.conf &&
 357            echo 'priority=3' || :)
 358 sudo sh -c 'cat >>/etc/schroot/schroot.conf' <<EOF
 359 [${target%bit}]
 360 description=${brand} ${distname} ${arch}
 361 type=directory
 362 directory=/var/lib/chroot/${target}
 363 users=root
 364 groups=${chroot_groups}
 365 root-groups=${chroot_groups}
 366 personality=linux$([ "${arch}" != 64bit ] && echo 32)
 367 script-config=script-${target}
 368 ${priority}
 369
 370 EOF
 371
 372 # Set up a list of mount points that is specific to this
 373 # chroot environment.
 374 sed '/^FSTAB=/s,"[^"]*","/etc/schroot/mount-'"${target}"'",' \
 375          /etc/schroot/script-defaults |
 376   sudo sh -c 'cat >/etc/schroot/script-'"${target}"
 377 sed '\,^/home[/[:space:]],s/\([,[:space:]]\)bind[[:space:]]/\1rbind /' \
 378   /etc/schroot/mount-defaults |
 379   sudo sh -c 'cat > /etc/schroot/mount-'"${target}"
 380
 381 # Add the extra mount points that the user told us about
 382 [ -n "${bind_mounts}" -a "${bind_mounts}" != "NONE" ] &&
 383   printf "${bind_mounts}" |
 384     sudo sh -c 'cat >>/etc/schroot/mount-'"${target}"
 385
 386 # If this system has a "/media" mountpoint, import it into the chroot
 387 # environment. Most modern distributions use this mount point to
 388 # automatically mount devices such as CDROMs, USB sticks, etc...
 389 if [ -d /media ] &&
 390    ! grep -qs '^/media' /etc/schroot/mount-"${target}"; then
 391   echo '/media /media none rw,rbind 0 0' |
 392     sudo sh -c 'cat >>/etc/schroot/mount-'"${target}"
 393 fi
 394
 395 # Share /dev/shm and possibly /run/shm
 396 grep -qs '^/dev/shm' /etc/schroot/mount-"${target}" ||
 397   echo '/dev/shm /dev/shm none rw,bind 0 0' |
 398     sudo sh -c 'cat >>/etc/schroot/mount-'"${target}"
 399 if [ -d "/var/lib/chroot/${target}/run" ] &&
 400    ! grep -qs '^/run/shm' /etc/schroot/mount-"${target}"; then
 401   { [ -d /run ] && echo '/run/shm /run/shm none rw,bind 0 0' ||
 402                    echo '/dev/shm /run/shm none rw,bind 0 0'; } |
 403     sudo sh -c 'cat >>/etc/schroot/mount-'"${target}"
 404 fi
 405
 406 # Set up a special directory that changes contents depending on the target
 407 # that is executing.
 408 d="$(readlink -f "${HOME}/chroot" 2>/dev/null || echo "${HOME}/chroot")"
 409 s="${d}/.${target}"
 410 echo "${s} ${d} none rw,bind 0 0" |
 411   sudo sh -c 'cat >>/etc/schroot/mount-'"${target}"
 412 mkdir -p "${s}"
 413
 414 # Install a helper script to launch commands in the chroot
 415 sudo sh -c 'cat >/usr/local/bin/'"${target%bit}" <<'EOF'
 416 #!/bin/bash
 417
 418 chroot="${0##*/}"
 419
 420 wrap() {
 421   # Word-wrap the text passed-in on stdin. Optionally, on continuation lines
 422   # insert the same number of spaces as the number of characters in the
 423   # parameter(s) passed to this function.
 424   # If the "fold" program cannot be found, or if the actual width of the
 425   # terminal cannot be determined, this function doesn't attempt to do any
 426   # wrapping.
 427   local f="$(type -P fold)"
 428   [ -z "${f}" ] && { cat; return; }
 429   local c="$(stty -a </dev/tty 2>/dev/null |
 430              sed 's/.*columns[[:space:]]*\([0-9]*\).*/\1/;t;d')"
 431   [ -z "${c}" ] && { cat; return; }
 432   local i="$(echo "$*"|sed 's/./ /g')"
 433   local j="$(printf %s "${i}"|wc -c)"
 434   if [ "${c}" -gt "${j}" ]; then
 435     dd bs=1 count="${j}" 2>/dev/null
 436     "${f}" -sw "$((${c}-${j}))" | sed '2,$s/^/'"${i}"'/'
 437   else
 438     "${f}" -sw "${c}"
 439   fi
 440 }
 441
 442 help() {
 443   echo "Usage ${0##*/} [-h|--help] [-c|--clean] [-C|--clean-all] [-l|--list] [--] args" | wrap "Usage ${0##*/} "
 444   echo "  help:      print this message"                                                | wrap "             "
 445   echo "  list:      list all known chroot environments"                                | wrap "             "
 446   echo "  clean:     remove all old chroot sessions for \"${chroot}\""                  | wrap "             "
 447   echo "  clean-all: remove all old chroot sessions for all environments"               | wrap "             "
 448   exit 0
 449 }
 450
 451 clean() {
 452   local s t rc
 453   rc=0
 454   for s in $(schroot -l --all-sessions); do
 455     if [ -n "$1" ]; then
 456       t="${s#session:}"
 457       [ "${t#${chroot}-}" == "${t}" ] && continue
 458     fi
 459     if ls -l /proc/*/{cwd,fd} 2>/dev/null |
 460        fgrep -qs "/var/lib/schroot/mount/${t}"; then
 461       echo "Session \"${t}\" still has active users, not cleaning up" | wrap
 462       rc=1
 463       continue
 464     fi
 465     sudo schroot -c "${s}" -e || rc=1
 466   done
 467   exit ${rc}
 468 }
 469
 470 list() {
 471   for e in $(schroot -l); do
 472     e="${e#chroot:}"
 473     [ -x "/usr/local/bin/${e}" ] || continue
 474     if schroot -l --all-sessions 2>/dev/null |
 475        sed 's/^session://' |
 476        grep -qs "^${e}-"; then
 477       echo "${e} is currently active"
 478     else
 479       echo "${e}"
 480     fi
 481   done
 482   exit 0
 483 }
 484
 485 while [ "$#" -ne 0 ]; do
 486   case "$1" in
 487     --)             shift; break;;
 488     -h|--help)      shift; help;;
 489     -l|--list)      shift; list;;
 490     -c|--clean)     shift; clean "${chroot}";;
 491     -C|--clean-all) shift; clean;;
 492     *)              break;;
 493   esac
 494 done
 495
 496 session="$(schroot -c "${chroot}" -b)"
 497
 498 if [ $# -eq 0 ]; then
 499   schroot -c "${session}" -r -p
 500 else
 501   p="$1"; shift
 502   schroot -c "${session}" -r -p "$p" -- "$@"
 503 fi
 504 rc=$?
 505
 506 i=$(schroot -c "${session}" -r -p ls -- -id /proc/self/root/. |
 507      awk '{ print $1 }') 2>/dev/null
 508 while [ -n "$i" ]; do
 509   pids=$(ls -id1 /proc/*/root/. 2>/dev/null |
 510          sed -e 's,^[^0-9]*'$i'.*/\([1-9][0-9]*\)/.*$,\1,
 511                  t
 512                  d') >/dev/null 2>&1
 513   [ -z "$pids" ] && break
 514   kill -9 $pids
 515 done
 516 schroot -c "${session}" -e
 517 exit $rc
 518 EOF
 519 sudo chown root:root /usr/local/bin/"${target%bit}"
 520 sudo chmod 755 /usr/local/bin/"${target%bit}"
 521
 522 # Add the standard Ubuntu update repositories if requested.
 523 [ "${alt_repos}" = "y" -a \
 524   -r "/var/lib/chroot/${target}/etc/apt/sources.list" ] &&
 525 sudo sed -i '/^deb .* [^ -]\+ main$/p
 526              s/^\(deb .* [^ -]\+\) main/\1-security main/
 527              p
 528              t1
 529              d
 530              :1;s/-security main/-updates main/
 531              t
 532              d' "/var/lib/chroot/${target}/etc/apt/sources.list"
 533
 534 # Add a few more repositories to the chroot
 535 [ -r "/var/lib/chroot/${target}/etc/apt/sources.list" ] &&
 536 sudo sed -i 's/ main$/ main restricted universe multiverse/' \
 537          "/var/lib/chroot/${target}/etc/apt/sources.list"
 538
 539 # Add the Ubuntu "partner" repository, if available
 540 if [ -r "/var/lib/chroot/${target}/etc/apt/sources.list" ] &&
 541    HEAD "http://archive.canonical.com/ubuntu/dists/${distname}/partner" \
 542    >&/dev/null; then
 543   sudo sh -c '
 544     echo "deb http://archive.canonical.com/ubuntu" \
 545          "'"${distname}"' partner" \
 546       >>"/var/lib/chroot/'"${target}"'/etc/apt/sources.list"'
 547 fi
 548
 549 # Add source repositories, if the user requested we do so
 550 [ "${add_srcs}" = "y" -a \
 551   -r "/var/lib/chroot/${target}/etc/apt/sources.list" ] &&
 552 sudo sed -i '/^deb[^-]/p
 553              s/^deb\([^-]\)/deb-src\1/' \
 554          "/var/lib/chroot/${target}/etc/apt/sources.list"
 555
 556 # Set apt proxy if host has set http_proxy
 557 if [ -n "${http_proxy}" ]; then
 558   sudo sh -c '
 559     echo "Acquire::http::proxy \"'"${http_proxy}"'\";" \
 560         >>"/var/lib/chroot/'"${target}"'/etc/apt/apt.conf"'
 561 fi
 562
 563 # Update packages
 564 sudo "/usr/local/bin/${target%bit}" /bin/sh -c '
 565   apt-get update; apt-get -y dist-upgrade' || :
 566
 567 # Install a couple of missing packages
 568 for i in debian-keyring ubuntu-keyring locales sudo; do
 569   [ -d "/var/lib/chroot/${target}/usr/share/doc/$i" ] ||
 570     sudo "/usr/local/bin/${target%bit}" apt-get -y install "$i" || :
 571 done
 572
 573 # Configure locales
 574 sudo "/usr/local/bin/${target%bit}" /bin/sh -c '
 575   l='"${LANG:-en_US}"'; l="${l%%.*}"
 576   [ -r /etc/locale.gen ] &&
 577     sed -i "s/^# \($l\)/\1/" /etc/locale.gen
 578   locale-gen $LANG en_US en_US.UTF-8' || :
 579
 580 # Enable multi-arch support, if available
 581 sudo "/usr/local/bin/${target%bit}" dpkg --assert-multi-arch >&/dev/null &&
 582   [ -r "/var/lib/chroot/${target}/etc/apt/sources.list" ] && {
 583   sudo sed -i 's/ / [arch=amd64,i386] /' \
 584               "/var/lib/chroot/${target}/etc/apt/sources.list"
 585   [ -d /var/lib/chroot/${target}/etc/dpkg/dpkg.cfg.d/ ] &&
 586   echo foreign-architecture \
 587        $([ "${arch}" = "32bit" ] && echo amd64 || echo i386) |
 588     sudo sh -c "cat >'/var/lib/chroot/${target}/etc/dpkg/dpkg.cfg.d/multiarch'"
 589 }
 590
 591 # Configure "sudo" package
 592 sudo "/usr/local/bin/${target%bit}" /bin/sh -c '
 593   egrep -qs '"'^$(id -nu) '"' /etc/sudoers ||
 594   echo '"'$(id -nu) ALL=(ALL) ALL'"' >>/etc/sudoers'
 595
 596 # Install a few more commonly used packages
 597 sudo "/usr/local/bin/${target%bit}" apt-get -y install                         \
 598   autoconf automake1.9 dpkg-dev g++-multilib gcc-multilib gdb less libtool     \
 599   strace
 600
 601 # If running a 32bit environment on a 64bit machine, install a few binaries
 602 # as 64bit. This is only done automatically if the chroot distro is the same as
 603 # the host, otherwise there might be incompatibilities in build settings or
 604 # runtime dependencies. The user can force it with the '-c' flag.
 605 host_distro=$(grep -s DISTRIB_CODENAME /etc/lsb-release | \
 606   cut -d "=" -f 2)
 607 if [ "${copy_64}" = "y" -o \
 608     "${host_distro}" = "${distname}" -a "${arch}" = 32bit ] && \
 609     file /bin/bash 2>/dev/null | grep -q x86-64; then
 610   readlinepkg=$(sudo "/usr/local/bin/${target%bit}" sh -c \
 611     'apt-cache search "lib64readline.\$" | sort | tail -n 1 | cut -d " " -f 1')
 612   sudo "/usr/local/bin/${target%bit}" apt-get -y install                       \
 613     lib64expat1 lib64ncurses5 ${readlinepkg} lib64z1
 614   dep=
 615   for i in binutils gdb; do
 616     [ -d /usr/share/doc/"$i" ] || dep="$dep $i"
 617   done
 618   [ -n "$dep" ] && sudo apt-get -y install $dep
 619   sudo mkdir -p "/var/lib/chroot/${target}/usr/local/lib/amd64"
 620   for i in libbfd libpython; do
 621     lib="$({ ldd /usr/bin/ld; ldd /usr/bin/gdb; } |
 622            grep -s "$i" | awk '{ print $3 }')"
 623     if [ -n "$lib" -a -r "$lib" ]; then
 624       sudo cp "$lib" "/var/lib/chroot/${target}/usr/local/lib/amd64"
 625     fi
 626   done
 627   for lib in libssl libcrypt; do
 628     for path in /usr/lib /usr/lib/x86_64-linux-gnu; do
 629       sudo cp $path/$lib* \
 630               "/var/lib/chroot/${target}/usr/local/lib/amd64/" >&/dev/null || :
 631     done
 632   done
 633   for i in gdb ld; do
 634     sudo cp /usr/bin/$i "/var/lib/chroot/${target}/usr/local/lib/amd64/"
 635     sudo sh -c "cat >'/var/lib/chroot/${target}/usr/local/bin/$i'" <<EOF
 636 #!/bin/sh
 637 exec /lib64/ld-linux-x86-64.so.2 --library-path /usr/local/lib/amd64 \
 638   /usr/local/lib/amd64/$i "\$@"
 639 EOF
 640     sudo chmod 755 "/var/lib/chroot/${target}/usr/local/bin/$i"
 641   done
 642 fi
 643
 644
 645 # If the install-build-deps.sh script can be found, offer to run it now
 646 script="$(dirname $(readlink -f "$0"))/install-build-deps.sh"
 647 if [ -x "${script}" ]; then
 648   while :; do
 649     echo
 650     echo "If you plan on building Chrome inside of the new chroot environment,"
 651     echo "you now have to install the build dependencies. Do you want me to"
 652     printf "start the script that does this for you (y/n)? "
 653     read install_deps
 654     case "${install_deps}" in
 655       y|Y)
 656         echo
 657         # We prefer running the script in-place, but this might not be
 658         # possible, if it lives on a network filesystem that denies
 659         # access to root.
 660         tmp_script=
 661         if ! sudo /usr/local/bin/"${target%bit}" \
 662             sh -c "[ -x '${script}' ]" >&/dev/null; then
 663           tmp_script="/tmp/${script##*/}"
 664           cp "${script}" "${tmp_script}"
 665         fi
 666         # Some distributions automatically start an instance of the system-
 667         # wide dbus daemon, cron daemon or of the logging daemon, when
 668         # installing the Chrome build depencies. This prevents the chroot
 669         # session from being closed.  So, we always try to shut down any running
 670         # instance of dbus and rsyslog.
 671         sudo /usr/local/bin/"${target%bit}" sh -c "${script} --no-lib32;
 672               rc=$?;
 673               /etc/init.d/cron stop >/dev/null 2>&1 || :;
 674               /etc/init.d/rsyslog stop >/dev/null 2>&1 || :;
 675               /etc/init.d/dbus stop >/dev/null 2>&1 || :;
 676               exit $rc"
 677         rc=$?
 678         [ -n "${tmp_script}" ] && rm -f "${tmp_script}"
 679         [ $rc -ne 0 ] && exit $rc
 680         break
 681       ;;
 682       n|N)
 683         break
 684       ;;
 685     esac
 686   done
 687   echo
 688 fi
 689
 690 # Check whether ~/chroot is on a (slow) network file system and offer to
 691 # relocate it. Also offer relocation, if the user appears to have multiple
 692 # spindles (as indicated by "${bind_mount}" being non-empty).
 693 # We only offer this option, if it doesn't look as if a chroot environment
 694 # is currently active. Otherwise, relocation is unlikely to work and it
 695 # can be difficult for the user to recover from the failed attempt to relocate
 696 # the ~/chroot directory.
 697 # We don't aim to solve this problem for every configuration,
 698 # but try to help with the common cases. For more advanced configuration
 699 # options, the user can always manually adjust things.
 700 mkdir -p "${HOME}/chroot/"
 701 if [ ! -h "${HOME}/chroot" ] &&
 702    ! egrep -qs '^[^[:space:]]*/chroot' /etc/fstab &&
 703    { [ -n "${bind_mounts}" -a "${bind_mounts}" != "NONE" ] ||
 704      is_network_drive "${HOME}/chroot"; } &&
 705    ! egrep -qs '/var/lib/[^/]*chroot/.*/chroot' /proc/mounts; then
 706   echo "${HOME}/chroot is currently located on the same device as your"
 707   echo "home directory."
 708   echo "This might not be what you want. Do you want me to move it somewhere"
 709   echo "else?"
 710   # If the computer has multiple spindles, many users configure all or part of
 711   # the secondary hard disk to be writable by the primary user of this machine.
 712   # Make some reasonable effort to detect this type of configuration and
 713   # then offer a good location for where to put the ~/chroot directory.
 714   suggest=
 715   for i in $(echo "${bind_mounts}"|cut -d ' ' -f 1); do
 716     if [ -d "$i" -a -w "$i" -a \( ! -a "$i/chroot" -o -w "$i/chroot/." \) ] &&
 717        ! is_network_drive "$i"; then
 718       suggest="$i"
 719     else
 720       for j in "$i/"*; do
 721         if [ -d "$j" -a -w "$j" -a \
 722              \( ! -a "$j/chroot" -o -w "$j/chroot/." \) ] &&
 723            ! is_network_drive "$j"; then
 724           suggest="$j"
 725         else
 726           for k in "$j/"*; do
 727             if [ -d "$k" -a -w "$k" -a \
 728                  \( ! -a "$k/chroot" -o -w "$k/chroot/." \) ] &&
 729                ! is_network_drive "$k"; then
 730               suggest="$k"
 731               break
 732             fi
 733           done
 734         fi
 735         [ -n "${suggest}" ] && break
 736       done
 737     fi
 738     [ -n "${suggest}" ] && break
 739   done
 740   def_suggest="${HOME}"
 741   if [ -n "${suggest}" ]; then
 742     # For home directories that reside on network drives, make our suggestion
 743     # the default option. For home directories that reside on a local drive,
 744     # require that the user manually enters the new location.
 745     if is_network_drive "${HOME}"; then
 746       def_suggest="${suggest}"
 747     else
 748       echo "A good location would probably be in \"${suggest}\""
 749     fi
 750   fi
 751   while :; do
 752     printf "Physical location [${def_suggest}]: "
 753     read dir
 754     [ -z "${dir}" ] && dir="${def_suggest}"
 755     [ "${dir%%/}" == "${HOME%%/}" ] && break
 756     if ! [ -d "${dir}" -a -w "${dir}" ] ||
 757        [ -a "${dir}/chroot" -a ! -w "${dir}/chroot/." ]; then
 758       echo "Cannot write to ${dir}/chroot. Please try again"
 759     else
 760       mv "${HOME}/chroot" "${dir}/chroot"
 761       ln -s "${dir}/chroot" "${HOME}/chroot"
 762       for i in $(list_all_chroots); do
 763         sudo "$i" mkdir -p "${dir}/chroot"
 764       done
 765       sudo sed -i "s,${HOME}/chroot,${dir}/chroot,g" /etc/schroot/mount-*
 766       break
 767     fi
 768   done
 769 fi
 770
 771 # Clean up package files
 772 sudo schroot -c "${target%bit}" -p -- apt-get clean
 773 sudo apt-get clean
 774
 775 trap '' INT TERM QUIT HUP
 776 trap '' EXIT
 777
 778 # Let the user know what we did
 779 cat <<EOF
 780
 781
 782 Successfully installed ${distname} ${arch}
 783
 784 You can run programs inside of the chroot by invoking the
 785 "/usr/local/bin/${target%bit}" command.
 786
 787 This command can be used with arguments, in order to just run a single
 788 program inside of the chroot environment (e.g. "${target%bit} make chrome")
 789 or without arguments, in order to run an interactive shell session inside
 790 of the chroot environment.
 791
 792 If you need to run things as "root", you can use "sudo" (e.g. try
 793 "sudo ${target%bit} apt-get update").
 794
 795 Your home directory is shared between the host and the chroot. But I
 796 configured "${HOME}/chroot" to be private to the chroot environment.
 797 You can use it for files that need to differ between environments. This
 798 would be a good place to store binaries that you have built from your
 799 source files.
 800
 801 For Chrome, this probably means you want to make your "out" directory a
 802 symbolic link that points somewhere inside of "${HOME}/chroot".
 803
 804 You still need to run "gclient runhooks" whenever you switch from building
 805 outside of the chroot to inside of the chroot. But you will find that you
 806 don't have to repeatedly erase and then completely rebuild all your object
 807 and binary files.
 808
 809 EOF