「64ビット環境に32ビット環境をインストール」の版間の差分

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#redirect [[ArchWiki:アーカイブ]]
[[Category:Arch の入手とインストール]]
 
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[[Category:アーカイブ]]
[[cs:Install bundled 32-bit system in 64-bit system]]
 
[[en:Install bundled 32-bit system in 64-bit system]]
 
[[fr:Install environnement 32 sur un systeme 64]]
 
[[zh-cn:Install bundled 32-bit system in 64-bit system]]
 
この記事では32ビットのアプリケーションを動作させる一つの方法を説明しています。multilib リポジトリから lib32-* ライブラリをインストールする代わりに32ビットのアプリケーションを分離させます。この方法では "chroot 監獄" を作成して32ビットのアプリを管理します。
 
 
{{Tip|1=Xyne has created a package that installs a minimalist 32-bit chroot as described below. See [https://bbs.archlinux.org/viewtopic.php?id=97629] and [http://xyne.archlinux.ca/projects/arch32-light] for details.}}
 
 
== インストール ==
 
 
1. ディレクトリを作成:
 
 
# mkdir /opt/arch32
 
 
2. chroot 用に一時的な [[pacman]] の設定ファイルを作成:
 
 
# sed -e 's/\$arch/i686/g' /etc/pacman.d/mirrorlist > /opt/arch32/mirrorlist
 
# sed -e 's@/etc/pacman.d/mirrorlist@/opt/arch32/mirrorlist@g' -e '/Architecture/ s,auto,i686,' /etc/pacman.conf > /opt/arch32/pacman.conf
 
 
*These files would conflict with the normal pacman files, which will be installed in the later steps.
 
*For this reason they must be put ''into'' a temporary location ({{ic|/opt/arch32}} is used here).
 
*Remember to delete/comment the multilib repo, if you have enabled it, in the {{ic|/opt/arch32/pacman.conf}} file
 
 
3. ディレクトリを作成:
 
 
# mkdir -p /opt/arch32/var/{cache/pacman/pkg,lib/pacman}
 
 
4. pacman を同期:
 
 
# pacman --root /opt/arch32 --cachedir /opt/arch32/var/cache/pacman/pkg --config /opt/arch32/pacman.conf -Sy
 
 
5. base グループと任意で base-devel グループをインストール:
 
 
# pacman --root /opt/arch32 --cachedir /opt/arch32/var/cache/pacman/pkg --config /opt/arch32/pacman.conf -S base base-devel
 
 
Optionally add your favorite text editor and distcc if you plan to compile within the chroot with other machines:
 
 
# pacman --root /opt/arch32 --cachedir /opt/arch32/var/cache/pacman/pkg --config /opt/arch32/pacman.conf -S base base-devel sudo vim distcc
 
 
Optionally move the pacman mirror list into place:
 
 
# mv /opt/arch32/mirrorlist /opt/arch32/etc/pacman.d
 
 
=== 設定 ===
 
 
重要な設定ファイルをコピーしてください:
 
 
# for i in passwd* shadow* group* sudoers resolv.conf localtime locale.gen vimrc mtab inputrc profile.d/locale.sh; do cp -p /etc/"$i" /opt/arch32/etc/; done
 
 
Remember to define the correct the number of MAKEFLAGS and other vars in {{ic|/opt/arch32/etc/makepkg.conf}} before attempting to build.
 
 
=== デーモンと systemd サービス ===
 
{{hc|/etc/systemd/system/arch32.service|<nowiki>
 
[Unit]
 
Description=32-bit chroot
 
 
[Service]
 
Type=oneshot
 
RemainAfterExit=yes
 
ExecStart=/usr/local/bin/arch32 start
 
ExecStop=/usr/local/bin/arch32 stop
 
 
[Install]
 
WantedBy=multi-user.target
 
</nowiki>}}
 
 
{{hc|/usr/local/bin/arch32|<nowiki>
 
#!/bin/bash
 
 
## User variables.
 
MOUNTPOINT=/opt/arch32
 
 
## Set MANAGEPARTITION to any value if /opt/arch32 resides on a separate
 
## partition and not mounted by /etc/fstab or some other means.
 
## If /opt/arch32 is part of your rootfs, leave this empty.
 
MANAGEPARTITION=
 
 
## Leave USEDISTCC empty unless you wish to use distccd from within the chroot.
 
USEDISTCC=
 
DISTCC_SUBNET='10.9.8.0/24'
 
 
## PIDFILE shouldn't need to ba changed from this default.
 
PIDFILE=/run/arch32
 
 
start_distccd() {
 
[[ ! -L "$MOUNTPOINT"/usr/bin/distccd-chroot ]] &&
 
ln -s /usr/bin/distccd "$MOUNTPOINT"/usr/bin/distccd-chroot
 
DISTCC_ARGS="--user nobody --allow $DISTCC_SUBNET --port 3692 --log-level warning --log-file /tmp/distccd-i686.log"
 
 
[[ -z "$(pgrep distccd-chroot)" ]] &&
 
linux32 chroot "$MOUNTPOINT" /bin/bash -c "/usr/bin/distccd-chroot --daemon $DISTCC_ARGS"
 
}
 
 
stop_distccd() {
 
[[ -n "$(pgrep distccd-chroot)" ]] &&
 
linux32 chroot "$MOUNTPOINT" /bin/bash -c "pkill -SIGTERM distccd-chroot"
 
}
 
 
case $1 in
 
start)
 
[[ -f "$PIDFILE" ]] && exit 1
 
 
if [[ -n "$MANAGEPARTITION" ]]; then
 
mountpoint -q $MOUNTPOINT || mount LABEL="arch32" $MOUNTPOINT
 
fi
 
 
dirs=(/tmp /dev /dev/pts /home)
 
for d in "${dirs[@]}"; do
 
mount -o bind $d "$MOUNTPOINT"$d
 
done
 
 
mount -t proc none "$MOUNTPOINT/proc"
 
mount -t sysfs none "$MOUNTPOINT/sys"
 
touch "$PIDFILE"
 
[[ -n "$USEDISTCC" ]] && start_distccd
 
;;
 
 
stop)
 
[[ ! -f "$PIDFILE" ]] && exit 1
 
[[ -n "$USEDISTCC" ]] && stop_distccd
 
 
if [[ -n "$MANAGEPARTITION" ]]; then
 
umount -R -A -l "$MOUNTPOINT"
 
else
 
dirs=(/home /dev/pts /dev /tmp)
 
[[ -n "$USEDISTCC" ]] && stop_distccd
 
umount "$MOUNTPOINT"/{sys,proc}
 
for d in "${dirs[@]}"; do
 
umount -l "$MOUNTPOINT$d"
 
done
 
fi
 
 
rm -f "$PIDFILE"
 
;;
 
*)
 
echo "usage: $0 (start|stop)"
 
exit 1
 
esac
 
</nowiki>}}
 
 
初期化スクリプトに実行可能属性を付与してください:
 
# chmod +x /usr/local/bin/arch32
 
 
{{ic|arch32.service}} を[[起動]]・[[有効化]]してください。
 
 
== 設定 ==
 
 
新しい環境に chroot:
 
 
# /usr/local/bin/arch32 start
 
$ xhost +SI:localuser:username_to_give_access_to
 
# chroot /opt/arch32
 
 
It is recommended to use a custom bash prompt inside the 32-bit chroot installation in order to differentiate from the regular system. You can, for example, add a ''ARCH32'' string to the ''PS1'' variable defined in {{ic|~/.bashrc}}. In fact, the default Debian .bashrc prompt string contains appropriate logic to report whether the working directory is within a chroot.
 
 
=== 初期設定 ===
 
 
ロケールの問題を修正:
 
 
# /usr/bin/locale-gen
 
 
pacman を初期化:
 
 
# sed -i 's/CheckSpace/#CheckSpace/' /etc/pacman.conf
 
# pacman-key --init && pacman-key --populate archlinux
 
 
== Schroot ==
 
 
{{Pkg|schroot}} をネイティブの'''64ビット'''環境に[[pacman|インストール]]:
 
 
{{ic|/etc/schroot/schroot.conf}} を編集して ''[Arch32]'' セクションを作成して下さい。
 
 
[Arch32]
 
type=directory
 
profile=arch32
 
description=Arch32
 
directory=/opt/arch32
 
users=user1,user2,user3
 
groups=users
 
root-groups=root
 
personality=linux32
 
aliases=32,default
 
 
Optionally edit {{ic|/etc/schroot/arch32/mount}} to match the mounts created within {{ic|/usr/local/bin/arch32}}.
 
 
=== Schroot を使って32ビットのアプリケーションを実行 ===
 
 
The general syntax for calling an application ''inside'' the chroot is:
 
 
# schroot -p -- htop
 
 
In this example, htop is called from within the 32-bit environment.
 
 
== トラブルシューティング ==
 
 
=== コンパイルとインストール ===
 
 
Ensure the desired options are set in the local {{ic|/etc/makepkg.conf}}.
 
 
Some packages may require a {{ic|--host}} flag be added to the ./configure script in the PKBUILD:
 
 
$ ./configure --host="i686-pc-linux" ...
 
 
This is the case when the build makes use of values (for example, the output of the {{ic|uname}} command) inherited from your base system.
 
 
===ビデオ問題===
 
 
If you get:
 
 
X Error of failed request: BadLength (poly request too large or internal Xlib length error)
 
 
while trying to run an application that requires video acceleration, make sure you have installed appropriate [[video drivers]] in your chroot.
 
 
=== Flash の音声 ===
 
 
To get sound from the flash player in Firefox, open a terminal and chroot inside the 32-bit system:
 
 
# chroot /opt/arch32
 
 
From there, install {{Pkg|alsa-oss}} as usual with [[pacman]].
 
 
Then type:
 
 
$ export FIREFOX_DSP="aoss"
 
 
Every chroot into the 32-bit system will require this export command to be entered so it may be best to incorporate it into a script.
 
 
Finally, launch Firefox.
 
 
For [[Wine]] this works the same way. The package alsa-oss will also install the alsa libs required by [[Wine]] to output sound.
 
 
== Tips and tricks ==
 
 
=== chroot の Java ===
 
 
See [[Java]]. After installation, adjust the path:
 
 
$ export PATH="/opt/java/bin/:$PATH"
 
 
=== 32ビットアプリケーションから64ビットの PulseAudio にアクセス ===
 
 
Additional paths have to be bind-mounted to the chroot environment:
 
 
# mount --bind /var/run /opt/arch32/var/run
 
# mount --bind /var/lib/dbus /opt/arch32/var/lib/dbus
 
 
Unmount them when leaving the environment:
 
 
# umount /opt/arch32/var/run
 
# umount /opt/arch32/var/lib/dbus
 
 
Optionally add the commands to the {{ic|/usr/local/bin/arch32}} script after the other bind-mount/umount commands. See [[PulseAudio/Examples#PulseAudio_from_within_a_chroot_.28e.g._32-bit_chroot_in_64-bit_install.29|PulseAudio from within a chroot]] for details
 
 
=== Firefox の音声 ===
 
 
Create {{ic|/usr/bin/firefox32}} as root:
 
 
#!/bin/sh
 
schroot -p firefox $1;export FIREFOX_DSP="aoss"
 
 
Make it executable:
 
 
# chmod +x /usr/bin/firefox32
 
 
Now you can make an alias for Firefox, if desired:
 
 
alias firefox="firefox32"
 
 
Add this to {{ic|~/.bashrc}} and source it to enable it. Or you can just change all your desktop environment's launchers to firefox32 if you still want 64-bit Firefox to be available.
 
 
=== 3D アクセラレーション ===
 
 
You need to install the corresponding package under your "native" arch for 3D support.
 
 
For information on how to set up your graphic adapter refer to:
 
 
* [[ATI]]
 
* [[Intel]]
 
* [[NVIDIA]]
 
 
=== Wine ===
 
 
In order to compile wine, you need a 32-bit system installed. Compiling wine is needed for applying patches in order to get [http://art.ified.ca/?page_id=40 PulseAudio] working. See also {{AUR|wine-hacks}} from AUR.
 
 
Add the following alias to {{ic|~/.bashrc}}:
 
 
alias wine='schroot -pqd "$(pwd)" -- wine'
 
 
The {{ic|-q}} switch makes schroot operate in quiet mode, so it works like "regular" wine does. Also note that If you still use dchroot instead of schroot, you should use switch {{ic|-d}} instead of {{ic|-s}}.
 
 
=== 印刷 ===
 
 
{{note|If you have a 64-bit base installation with a [[Install_bundled_32-bit_system_in_Arch64|32-bit chroot environment]], explicit installation of CUPS is not necessary in the 32-bit environment.}}
 
 
To access installed CUPS printers from the chroot environment, one needs to bind the {{ic|/var/run/cups}} directory to the same (relative) location in the chroot environment.
 
 
Simply make sure the {{ic|/var/run/cups}} directory exists in the chroot environment and bind-mount the host {{ic|/var/run/cups}} to the chroot environment:
 
 
# mkdir ''chroot32-dir/var/run/cups''
 
# mount --bind /var/run/cups ''chroot32-dir/var/run/cups''
 
 
and printers should be available from 32-bit chroot applications immediately.
 

2024年9月7日 (土) 19:35時点における最新版