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Diffstat (limited to 'hurd/running/chroot.mdwn')
-rw-r--r-- | hurd/running/chroot.mdwn | 54 |
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diff --git a/hurd/running/chroot.mdwn b/hurd/running/chroot.mdwn new file mode 100644 index 00000000..29b00a8f --- /dev/null +++ b/hurd/running/chroot.mdwn @@ -0,0 +1,54 @@ +[[!meta copyright="Copyright © 2012 Free Software Foundation, Inc."]] + +[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable +id="license" text="Permission is granted to copy, distribute and/or modify this +document under the terms of the GNU Free Documentation License, Version 1.2 or +any later version published by the Free Software Foundation; with no Invariant +Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license +is included in the section entitled [[GNU Free Documentation +License|/fdl]]."]]"""]] + +This documents the currently-needed tricks to successfully build a +[[glibc/chroot]] in GNU/Hurd. + +# Preparation + +For proper translator startup, the chroot storage needs to be handled by a +separate translator, for instance: + + # dd [...] < /dev/zero > storage + # mke2fs storage + # settrans -c chroot /hurd/ext2fs $PWD/storage + +# Unpack + +Debootstrap should be able to build the content: + + # debootstrap sid chroot + +# Tricks + +One current issue to know about chroots is that since passive translators (e.g. +`/servers/socket/1`) are started by the root translator, which is not aware +of the chrooting, these passive translators are started non-chrooted, leading to +a few issues. +[[!tag open_issue_hurd]] + +## Sockets + +Since the passive [[translator/pflocal]] translator will not be chrooted, local +socket creation +will actually happen in the root filesystem. To make things work correctly the +programs inside the chroot need to be able to access them: + + # settrans chroot/servers/socket/1 /hurd/firmlink /servers/socket/1 + # settrans chroot/tmp /hurd/firmlink /tmp + # settrans -c chroot/var/lib/dbus /hurd/firmlink /var/lib/dbus + +## Network + +Unless using a separate IP for the chroot, it is preferrable to share the +[[translator/pfinet]] translator: + + # settrans chroot/servers/socket/2 /hurd/firmlink /servers/socket/2 + # settrans chroot/servers/socket/26 /hurd/firmlink /servers/socket/26 |