49e8829053
appear writable (though all writes go to a tmpfs). This allows you to run Nix operations on the Live CD. However, we're not quite there yet since the CD doesn't have a valid Nix database. So for instance a garbage collect will cause everything to be deleted, hanging the system. svn path=/nixos/trunk/; revision=10276
163 lines
4.3 KiB
Bash
163 lines
4.3 KiB
Bash
#! @shell@
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systemConfig="$1"
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if test -z "$systemConfig"; then
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systemConfig="/system" # for the installation CD
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fi
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export PATH=/empty
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for i in @path@; do PATH=$PATH:$i/bin:$i/sbin; done
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# Needed by some programs.
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ln -sfn /proc/self/fd /dev/fd
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ln -sfn /proc/self/fd/0 /dev/stdin
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ln -sfn /proc/self/fd/1 /dev/stdout
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ln -sfn /proc/self/fd/2 /dev/stderr
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# Set up the statically computed bits of /etc.
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staticEtc=/etc/static
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rm -f $staticEtc
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ln -s @etc@/etc $staticEtc
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for i in $(cd $staticEtc && find * -type l); do
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mkdir -p /etc/$(dirname $i)
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rm -f /etc/$i
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if test -e "$staticEtc/$i.mode"; then
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# Create a regular file in /etc.
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cp $staticEtc/$i /etc/$i
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chown root.root /etc/$i
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chmod "$(cat "$staticEtc/$i.mode")" /etc/$i
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else
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# Create a symlink in /etc.
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ln -s $staticEtc/$i /etc/$i
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fi
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done
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# Remove dangling symlinks that point to /etc/static. These are
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# configuration files that existed in a previous configuration but not
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# in the current one.
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for i in $(find /etc/ -type l); do
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target=$(readlink "$i")
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if test "${target:0:${#staticEtc}}" = "$staticEtc" -a ! -e "$i"; then
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rm -f "$i"
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fi
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done
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# Create the required /bin/sh symlink; otherwise lots of things
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# (notably the system() function) won't work.
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mkdir -m 0755 -p $mountPoint/bin
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ln -sfn @bash@/bin/sh $mountPoint/bin/sh
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# Allow the kernel to find our wrapped modprobe (which searches in the
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# right location in the Nix store for kernel modules). We need this
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# when the kernel (or some module) auto-loads a module.
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# !!! maybe this should only happen at boot time, since we shouldn't
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# use modules that don't match the running kernel.
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echo @modprobe@/sbin/modprobe > /proc/sys/kernel/modprobe
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# Various log/runtime directories.
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mkdir -m 0755 -p /var/run
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mkdir -m 0755 -p /var/run/console # for pam_console
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touch /var/run/utmp # must exist
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chmod 644 /var/run/utmp
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mkdir -m 0755 -p /var/run/nix/current-load # for distributed builds
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mkdir -m 0755 -p /var/log
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touch /var/log/wtmp # must exist
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chmod 644 /var/log/wtmp
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touch /var/log/lastlog
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chmod 644 /var/log/lastlog
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mkdir -m 1777 -p /var/tmp
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# Empty, read-only home directory of many system accounts.
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mkdir -m 0555 -p /var/empty
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# If there is no password file yet, create a root account with an
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# empty password.
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if ! test -e /etc/passwd; then
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rootHome=/root
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touch /etc/passwd; chmod 0644 /etc/passwd
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touch /etc/group; chmod 0644 /etc/group
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touch /etc/shadow; chmod 0600 /etc/shadow
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# Can't use useradd, since it complains that it doesn't know us
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# (bootstrap problem!).
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echo "root:x:0:0:System administrator:$rootHome:@defaultShell@" >> /etc/passwd
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echo "root::::::::" >> /etc/shadow
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echo | passwd --stdin root
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fi
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# Create system users and groups.
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@shell@ @createUsersGroups@ @usersList@ @groupsList@
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# Set up Nix.
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mkdir -p /nix/etc/nix
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ln -sfn /etc/nix.conf /nix/etc/nix/nix.conf
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chown root.nixbld /nix/store
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chmod 1775 /nix/store
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# Nix initialisation.
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mkdir -m 0755 -p \
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/nix/var/nix/gcroots \
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/nix/var/nix/temproots \
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/nix/var/nix/manifests \
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/nix/var/nix/userpool \
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/nix/var/nix/profiles \
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/nix/var/nix/db \
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/nix/var/log/nix/drvs \
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/nix/var/nix/channel-cache
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mkdir -m 1777 -p /nix/var/nix/gcroots/per-user
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mkdir -m 1777 -p /nix/var/nix/profiles/per-user
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ln -sf /nix/var/nix/profiles /nix/var/nix/gcroots/
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ln -sf /nix/var/nix/manifests /nix/var/nix/gcroots/
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# Make a few setuid programs work.
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PATH=@systemPath@/bin:@systemPath@/sbin:$PATH
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wrapperDir=@wrapperDir@
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if test -d $wrapperDir; then rm -f $wrapperDir/*; fi
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mkdir -p $wrapperDir
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for i in @setuidPrograms@; do
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program=$(type -tp $i)
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cp "$(type -tp setuid-wrapper)" $wrapperDir/$i
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echo -n $program > $wrapperDir/$i.real
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chown root.root $wrapperDir/$i
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chmod 4755 $wrapperDir/$i
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done
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# Set the host name. Don't clear it if it's not configured in the
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# NixOS configuration, since it may have been set by dhclient in the
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# meantime.
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if test -n "@hostName@"; then
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hostname @hostName@
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else
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# dhclient won't do anything if the hostname isn't empty.
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if test "$(hostname)" = "(none)"; then
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hostname ''
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fi
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fi
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# Make this configuration the current configuration.
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ln -sfn "$systemConfig" /var/run/current-system
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# Prevent the current configuration from being garbage-collected.
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ln -sfn /var/run/current-system /nix/var/nix/gcroots/current-system
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