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 preferred 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-'"${target}"
 393 fi
 394
 395 # Share /dev/shm, /run and /run/shm.
 396 grep -qs '^/dev/shm' /etc/schroot/mount-"${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' /etc/schroot/mount-"${target}"; then
 401   echo '/run /run none rw,bind 0 0' |
 402     sudo sh -c 'cat >>/etc/schroot/mount-'"${target}"
 403 fi
 404 if ! grep -qs '^/run/shm' /etc/schroot/mount-"${target}"; then
 405   { [ -d /run ] && echo '/run/shm /run/shm none rw,bind 0 0' ||
 406                    echo '/dev/shm /run/shm none rw,bind 0 0'; } |
 407     sudo sh -c 'cat >>/etc/schroot/mount-'"${target}"
 408 fi
 409
 410 # Set up a special directory that changes contents depending on the target
 411 # that is executing.
 412 d="$(readlink -f "${HOME}/chroot" 2>/dev/null || echo "${HOME}/chroot")"
 413 s="${d}/.${target}"
 414 echo "${s} ${d} none rw,bind 0 0" |
 415   sudo sh -c 'cat >>/etc/schroot/mount-'"${target}"
 416 mkdir -p "${s}"
 417
 418 # Install a helper script to launch commands in the chroot
 419 sudo sh -c 'cat >/usr/local/bin/'"${target%bit}" <<'EOF'
 420 #!/bin/bash
 421
 422 chroot="${0##*/}"
 423
 424 wrap() {
 425   # Word-wrap the text passed-in on stdin. Optionally, on continuation lines
 426   # insert the same number of spaces as the number of characters in the
 427   # parameter(s) passed to this function.
 428   # If the "fold" program cannot be found, or if the actual width of the
 429   # terminal cannot be determined, this function doesn't attempt to do any
 430   # wrapping.
 431   local f="$(type -P fold)"
 432   [ -z "${f}" ] && { cat; return; }
 433   local c="$(stty -a </dev/tty 2>/dev/null |
 434              sed 's/.*columns[[:space:]]*\([0-9]*\).*/\1/;t;d')"
 435   [ -z "${c}" ] && { cat; return; }
 436   local i="$(echo "$*"|sed 's/./ /g')"
 437   local j="$(printf %s "${i}"|wc -c)"
 438   if [ "${c}" -gt "${j}" ]; then
 439     dd bs=1 count="${j}" 2>/dev/null
 440     "${f}" -sw "$((${c}-${j}))" | sed '2,$s/^/'"${i}"'/'
 441   else
 442     "${f}" -sw "${c}"
 443   fi
 444 }
 445
 446 help() {
 447   echo "Usage ${0##*/} [-h|--help] [-c|--clean] [-C|--clean-all] [-l|--list] [--] args" | wrap "Usage ${0##*/} "
 448   echo "  help:      print this message"                                                | wrap "             "
 449   echo "  list:      list all known chroot environments"                                | wrap "             "
 450   echo "  clean:     remove all old chroot sessions for \"${chroot}\""                  | wrap "             "
 451   echo "  clean-all: remove all old chroot sessions for all environments"               | wrap "             "
 452   exit 0
 453 }
 454
 455 clean() {
 456   local s t rc
 457   rc=0
 458   for s in $(schroot -l --all-sessions); do
 459     if [ -n "$1" ]; then
 460       t="${s#session:}"
 461       [ "${t#${chroot}-}" == "${t}" ] && continue
 462     fi
 463     if ls -l /proc/*/{cwd,fd} 2>/dev/null |
 464        fgrep -qs "/var/lib/schroot/mount/${t}"; then
 465       echo "Session \"${t}\" still has active users, not cleaning up" | wrap
 466       rc=1
 467       continue
 468     fi
 469     sudo schroot -c "${s}" -e || rc=1
 470   done
 471   exit ${rc}
 472 }
 473
 474 list() {
 475   for e in $(schroot -l); do
 476     e="${e#chroot:}"
 477     [ -x "/usr/local/bin/${e}" ] || continue
 478     if schroot -l --all-sessions 2>/dev/null |
 479        sed 's/^session://' |
 480        grep -qs "^${e}-"; then
 481       echo "${e} is currently active"
 482     else
 483       echo "${e}"
 484     fi
 485   done
 486   exit 0
 487 }
 488
 489 while [ "$#" -ne 0 ]; do
 490   case "$1" in
 491     --)             shift; break;;
 492     -h|--help)      shift; help;;
 493     -l|--list)      shift; list;;
 494     -c|--clean)     shift; clean "${chroot}";;
 495     -C|--clean-all) shift; clean;;
 496     *)              break;;
 497   esac
 498 done
 499
 500 # Start a new chroot session and keep track of the session id. We inject this
 501 # id into all processes that run inside the chroot. Unless they go out of their
 502 # way to clear their environment, we can then later identify our child and
 503 # grand-child processes by scanning their environment.
 504 session="$(schroot -c "${chroot}" -b)"
 505 export CHROOT_SESSION_ID="${session}"
 506
 507 if [ $# -eq 0 ]; then
 508   # Run an interactive shell session
 509   schroot -c "${session}" -r -p
 510 else
 511   # Run a command inside of the chroot environment
 512   p="$1"; shift
 513   schroot -c "${session}" -r -p "$p" -- "$@"
 514 fi
 515 rc=$?
 516
 517 # Compute the inode of the root directory inside of the chroot environment.
 518 i=$(schroot -c "${session}" -r -p ls -- -id /proc/self/root/. |
 519      awk '{ print $1 }') 2>/dev/null
 520 other_pids=
 521 while [ -n "$i" ]; do
 522   # Identify processes by the inode number of their root directory. Then
 523   # remove all processes that we know belong to other sessions. We use
 524   # "sort | uniq -u" to do what amounts to a "set substraction operation".
 525   pids=$({ ls -id1 /proc/*/root/. 2>/dev/null |
 526          sed -e 's,^[^0-9]*'$i'.*/\([1-9][0-9]*\)/.*$,\1,
 527                  t
 528                  d';
 529          echo "${other_pids}";
 530          echo "${other_pids}"; } | sort | uniq -u) >/dev/null 2>&1
 531   # Kill all processes that are still left running in the session. This is
 532   # typically an assortment of daemon processes that were started
 533   # automatically. They result in us being unable to tear down the session
 534   # cleanly.
 535   [ -z "${pids}" ] && break
 536   for j in $pids; do
 537     # Unfortunately, the way that schroot sets up sessions has the
 538     # side-effect of being unable to tell one session apart from another.
 539     # This can result in us attempting to kill processes in other sessions.
 540     # We make a best-effort to avoid doing so.
 541     k="$( ( xargs -0 -n1 </proc/$j/environ ) 2>/dev/null |
 542          sed 's/^CHROOT_SESSION_ID=/x/;t1;d;:1;q')"
 543     if [ -n "${k}" -a "${k#x}" != "${session}" ]; then
 544       other_pids="${other_pids}
 545 ${j}"
 546       continue
 547     fi
 548     kill -9 $pids
 549   done
 550 done
 551 # End the chroot session. This should clean up all temporary files. But if we
 552 # earlier failed to terminate all (daemon) processes inside of the session,
 553 # deleting the session could fail. When that happens, the user has to manually
 554 # clean up the stale files by invoking us with "--clean" after having killed
 555 # all running processes.
 556 schroot -c "${session}" -e
 557 exit $rc
 558 EOF
 559 sudo chown root:root /usr/local/bin/"${target%bit}"
 560 sudo chmod 755 /usr/local/bin/"${target%bit}"
 561
 562 # Add the standard Ubuntu update repositories if requested.
 563 [ "${alt_repos}" = "y" -a \
 564   -r "/var/lib/chroot/${target}/etc/apt/sources.list" ] &&
 565 sudo sed -i '/^deb .* [^ -]\+ main$/p
 566              s/^\(deb .* [^ -]\+\) main/\1-security main/
 567              p
 568              t1
 569              d
 570              :1;s/-security main/-updates main/
 571              t
 572              d' "/var/lib/chroot/${target}/etc/apt/sources.list"
 573
 574 # Add a few more repositories to the chroot
 575 [ -r "/var/lib/chroot/${target}/etc/apt/sources.list" ] &&
 576 sudo sed -i 's/ main$/ main restricted universe multiverse/' \
 577          "/var/lib/chroot/${target}/etc/apt/sources.list"
 578
 579 # Add the Ubuntu "partner" repository, if available
 580 if [ -r "/var/lib/chroot/${target}/etc/apt/sources.list" ] &&
 581    HEAD "http://archive.canonical.com/ubuntu/dists/${distname}/partner" \
 582    >&/dev/null; then
 583   sudo sh -c '
 584     echo "deb http://archive.canonical.com/ubuntu" \
 585          "'"${distname}"' partner" \
 586       >>"/var/lib/chroot/'"${target}"'/etc/apt/sources.list"'
 587 fi
 588
 589 # Add source repositories, if the user requested we do so
 590 [ "${add_srcs}" = "y" -a \
 591   -r "/var/lib/chroot/${target}/etc/apt/sources.list" ] &&
 592 sudo sed -i '/^deb[^-]/p
 593              s/^deb\([^-]\)/deb-src\1/' \
 594          "/var/lib/chroot/${target}/etc/apt/sources.list"
 595
 596 # Set apt proxy if host has set http_proxy
 597 if [ -n "${http_proxy}" ]; then
 598   sudo sh -c '
 599     echo "Acquire::http::proxy \"'"${http_proxy}"'\";" \
 600         >>"/var/lib/chroot/'"${target}"'/etc/apt/apt.conf"'
 601 fi
 602
 603 # Update packages
 604 sudo "/usr/local/bin/${target%bit}" /bin/sh -c '
 605   apt-get update; apt-get -y dist-upgrade' || :
 606
 607 # Install a couple of missing packages
 608 for i in debian-keyring ubuntu-keyring locales sudo; do
 609   [ -d "/var/lib/chroot/${target}/usr/share/doc/$i" ] ||
 610     sudo "/usr/local/bin/${target%bit}" apt-get -y install "$i" || :
 611 done
 612
 613 # Configure locales
 614 sudo "/usr/local/bin/${target%bit}" /bin/sh -c '
 615   l='"${LANG:-en_US}"'; l="${l%%.*}"
 616   [ -r /etc/locale.gen ] &&
 617     sed -i "s/^# \($l\)/\1/" /etc/locale.gen
 618   locale-gen $LANG en_US en_US.UTF-8' || :
 619
 620 # Enable multi-arch support, if available
 621 sudo "/usr/local/bin/${target%bit}" dpkg --assert-multi-arch >&/dev/null &&
 622   [ -r "/var/lib/chroot/${target}/etc/apt/sources.list" ] && {
 623   sudo sed -i 's/ / [arch=amd64,i386] /' \
 624               "/var/lib/chroot/${target}/etc/apt/sources.list"
 625   [ -d /var/lib/chroot/${target}/etc/dpkg/dpkg.cfg.d/ ] &&
 626   sudo "/usr/local/bin/${target%bit}" dpkg --add-architecture \
 627       $([ "${arch}" = "32bit" ] && echo amd64 || echo i386) >&/dev/null ||
 628     echo foreign-architecture \
 629         $([ "${arch}" = "32bit" ] && echo amd64 || echo i386) |
 630       sudo sh -c \
 631         "cat >'/var/lib/chroot/${target}/etc/dpkg/dpkg.cfg.d/multiarch'"
 632 }
 633
 634 # Configure "sudo" package
 635 sudo "/usr/local/bin/${target%bit}" /bin/sh -c '
 636   egrep -qs '"'^$(id -nu) '"' /etc/sudoers ||
 637   echo '"'$(id -nu) ALL=(ALL) ALL'"' >>/etc/sudoers'
 638
 639 # Install a few more commonly used packages
 640 sudo "/usr/local/bin/${target%bit}" apt-get -y install                         \
 641   autoconf automake1.9 dpkg-dev g++-multilib gcc-multilib gdb less libtool     \
 642   strace
 643
 644 # If running a 32bit environment on a 64bit machine, install a few binaries
 645 # as 64bit. This is only done automatically if the chroot distro is the same as
 646 # the host, otherwise there might be incompatibilities in build settings or
 647 # runtime dependencies. The user can force it with the '-c' flag.
 648 host_distro=$(grep -s DISTRIB_CODENAME /etc/lsb-release | \
 649   cut -d "=" -f 2)
 650 if [ "${copy_64}" = "y" -o \
 651     "${host_distro}" = "${distname}" -a "${arch}" = 32bit ] && \
 652     file /bin/bash 2>/dev/null | grep -q x86-64; then
 653   readlinepkg=$(sudo "/usr/local/bin/${target%bit}" sh -c \
 654     'apt-cache search "lib64readline.\$" | sort | tail -n 1 | cut -d " " -f 1')
 655   sudo "/usr/local/bin/${target%bit}" apt-get -y install                       \
 656     lib64expat1 lib64ncurses5 ${readlinepkg} lib64z1
 657   dep=
 658   for i in binutils gdb; do
 659     [ -d /usr/share/doc/"$i" ] || dep="$dep $i"
 660   done
 661   [ -n "$dep" ] && sudo apt-get -y install $dep
 662   sudo mkdir -p "/var/lib/chroot/${target}/usr/local/lib/amd64"
 663   for i in libbfd libpython; do
 664     lib="$({ ldd /usr/bin/ld; ldd /usr/bin/gdb; } |
 665            grep -s "$i" | awk '{ print $3 }')"
 666     if [ -n "$lib" -a -r "$lib" ]; then
 667       sudo cp "$lib" "/var/lib/chroot/${target}/usr/local/lib/amd64"
 668     fi
 669   done
 670   for lib in libssl libcrypt; do
 671     for path in /usr/lib /usr/lib/x86_64-linux-gnu; do
 672       sudo cp $path/$lib* \
 673               "/var/lib/chroot/${target}/usr/local/lib/amd64/" >&/dev/null || :
 674     done
 675   done
 676   for i in gdb ld; do
 677     sudo cp /usr/bin/$i "/var/lib/chroot/${target}/usr/local/lib/amd64/"
 678     sudo sh -c "cat >'/var/lib/chroot/${target}/usr/local/bin/$i'" <<EOF
 679 #!/bin/sh
 680 exec /lib64/ld-linux-x86-64.so.2 --library-path /usr/local/lib/amd64 \
 681   /usr/local/lib/amd64/$i "\$@"
 682 EOF
 683     sudo chmod 755 "/var/lib/chroot/${target}/usr/local/bin/$i"
 684   done
 685 fi
 686
 687
 688 # If the install-build-deps.sh script can be found, offer to run it now
 689 script="$(dirname $(readlink -f "$0"))/install-build-deps.sh"
 690 if [ -x "${script}" ]; then
 691   while :; do
 692     echo
 693     echo "If you plan on building Chrome inside of the new chroot environment,"
 694     echo "you now have to install the build dependencies. Do you want me to"
 695     printf "start the script that does this for you (y/n)? "
 696     read install_deps
 697     case "${install_deps}" in
 698       y|Y)
 699         echo
 700         # We prefer running the script in-place, but this might not be
 701         # possible, if it lives on a network filesystem that denies
 702         # access to root.
 703         tmp_script=
 704         if ! sudo /usr/local/bin/"${target%bit}" \
 705             sh -c "[ -x '${script}' ]" >&/dev/null; then
 706           tmp_script="/tmp/${script##*/}"
 707           cp "${script}" "${tmp_script}"
 708         fi
 709         # Some distributions automatically start an instance of the system-
 710         # wide dbus daemon, cron daemon or of the logging daemon, when
 711         # installing the Chrome build depencies. This prevents the chroot
 712         # session from being closed.  So, we always try to shut down any running
 713         # instance of dbus and rsyslog.
 714         sudo /usr/local/bin/"${target%bit}" sh -c "${script} --no-lib32;
 715               rc=$?;
 716               /etc/init.d/cron stop >/dev/null 2>&1 || :;
 717               /etc/init.d/rsyslog stop >/dev/null 2>&1 || :;
 718               /etc/init.d/dbus stop >/dev/null 2>&1 || :;
 719               exit $rc"
 720         rc=$?
 721         [ -n "${tmp_script}" ] && rm -f "${tmp_script}"
 722         [ $rc -ne 0 ] && exit $rc
 723         break
 724       ;;
 725       n|N)
 726         break
 727       ;;
 728     esac
 729   done
 730   echo
 731 fi
 732
 733 # Check whether ~/chroot is on a (slow) network file system and offer to
 734 # relocate it. Also offer relocation, if the user appears to have multiple
 735 # spindles (as indicated by "${bind_mount}" being non-empty).
 736 # We only offer this option, if it doesn't look as if a chroot environment
 737 # is currently active. Otherwise, relocation is unlikely to work and it
 738 # can be difficult for the user to recover from the failed attempt to relocate
 739 # the ~/chroot directory.
 740 # We don't aim to solve this problem for every configuration,
 741 # but try to help with the common cases. For more advanced configuration
 742 # options, the user can always manually adjust things.
 743 mkdir -p "${HOME}/chroot/"
 744 if [ ! -h "${HOME}/chroot" ] &&
 745    ! egrep -qs '^[^[:space:]]*/chroot' /etc/fstab &&
 746    { [ -n "${bind_mounts}" -a "${bind_mounts}" != "NONE" ] ||
 747      is_network_drive "${HOME}/chroot"; } &&
 748    ! egrep -qs '/var/lib/[^/]*chroot/.*/chroot' /proc/mounts; then
 749   echo "${HOME}/chroot is currently located on the same device as your"
 750   echo "home directory."
 751   echo "This might not be what you want. Do you want me to move it somewhere"
 752   echo "else?"
 753   # If the computer has multiple spindles, many users configure all or part of
 754   # the secondary hard disk to be writable by the primary user of this machine.
 755   # Make some reasonable effort to detect this type of configuration and
 756   # then offer a good location for where to put the ~/chroot directory.
 757   suggest=
 758   for i in $(echo "${bind_mounts}"|cut -d ' ' -f 1); do
 759     if [ -d "$i" -a -w "$i" -a \( ! -a "$i/chroot" -o -w "$i/chroot/." \) ] &&
 760        ! is_network_drive "$i"; then
 761       suggest="$i"
 762     else
 763       for j in "$i/"*; do
 764         if [ -d "$j" -a -w "$j" -a \
 765              \( ! -a "$j/chroot" -o -w "$j/chroot/." \) ] &&
 766            ! is_network_drive "$j"; then
 767           suggest="$j"
 768         else
 769           for k in "$j/"*; do
 770             if [ -d "$k" -a -w "$k" -a \
 771                  \( ! -a "$k/chroot" -o -w "$k/chroot/." \) ] &&
 772                ! is_network_drive "$k"; then
 773               suggest="$k"
 774               break
 775             fi
 776           done
 777         fi
 778         [ -n "${suggest}" ] && break
 779       done
 780     fi
 781     [ -n "${suggest}" ] && break
 782   done
 783   def_suggest="${HOME}"
 784   if [ -n "${suggest}" ]; then
 785     # For home directories that reside on network drives, make our suggestion
 786     # the default option. For home directories that reside on a local drive,
 787     # require that the user manually enters the new location.
 788     if is_network_drive "${HOME}"; then
 789       def_suggest="${suggest}"
 790     else
 791       echo "A good location would probably be in \"${suggest}\""
 792     fi
 793   fi
 794   while :; do
 795     printf "Physical location [${def_suggest}]: "
 796     read dir
 797     [ -z "${dir}" ] && dir="${def_suggest}"
 798     [ "${dir%%/}" == "${HOME%%/}" ] && break
 799     if ! [ -d "${dir}" -a -w "${dir}" ] ||
 800        [ -a "${dir}/chroot" -a ! -w "${dir}/chroot/." ]; then
 801       echo "Cannot write to ${dir}/chroot. Please try again"
 802     else
 803       mv "${HOME}/chroot" "${dir}/chroot"
 804       ln -s "${dir}/chroot" "${HOME}/chroot"
 805       for i in $(list_all_chroots); do
 806         sudo "$i" mkdir -p "${dir}/chroot"
 807       done
 808       sudo sed -i "s,${HOME}/chroot,${dir}/chroot,g" /etc/schroot/mount-*
 809       break
 810     fi
 811   done
 812 fi
 813
 814 # Clean up package files
 815 sudo schroot -c "${target%bit}" -p -- apt-get clean
 816 sudo apt-get clean
 817
 818 trap '' INT TERM QUIT HUP
 819 trap '' EXIT
 820
 821 # Let the user know what we did
 822 cat <<EOF
 823
 824
 825 Successfully installed ${distname} ${arch}
 826
 827 You can run programs inside of the chroot by invoking the
 828 "/usr/local/bin/${target%bit}" command.
 829
 830 This command can be used with arguments, in order to just run a single
 831 program inside of the chroot environment (e.g. "${target%bit} make chrome")
 832 or without arguments, in order to run an interactive shell session inside
 833 of the chroot environment.
 834
 835 If you need to run things as "root", you can use "sudo" (e.g. try
 836 "sudo ${target%bit} apt-get update").
 837
 838 Your home directory is shared between the host and the chroot. But I
 839 configured "${HOME}/chroot" to be private to the chroot environment.
 840 You can use it for files that need to differ between environments. This
 841 would be a good place to store binaries that you have built from your
 842 source files.
 843
 844 For Chrome, this probably means you want to make your "out" directory a
 845 symbolic link that points somewhere inside of "${HOME}/chroot".
 846
 847 You still need to run "gclient runhooks" whenever you switch from building
 848 outside of the chroot to inside of the chroot. But you will find that you
 849 don't have to repeatedly erase and then completely rebuild all your object
 850 and binary files.
 851
 852 EOF