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https://github.com/NixOS/nixpkgs.git
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59 lines
1.5 KiB
Bash
59 lines
1.5 KiB
Bash
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#! @shell@
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set -e
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# Re-exec ourselves in a private mount namespace so that our bind
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# mounts get cleaned up automatically.
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if [ "$(id -u)" = 0 ]; then
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if [ -z "$NIXOS_ENTER_REEXEC" ]; then
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export NIXOS_ENTER_REEXEC=1
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exec unshare --mount --uts -- "$0" "$@"
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else
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mount --make-rprivate /
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fi
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fi
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mountPoint=/mnt
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command=("bash" "--login")
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system=/nix/var/nix/profiles/system
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while [ "$#" -gt 0 ]; do
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i="$1"; shift 1
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case "$i" in
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--root)
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mountPoint="$1"; shift 1
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;;
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--system)
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system="$1"; shift 1
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;;
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--help)
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exec man nixos-enter
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exit 1
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;;
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--command|-c)
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command=("bash" "-c" "$1")
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shift 1
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;;
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--)
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command=("$@")
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break
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;;
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*)
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echo "$0: unknown option \`$i'"
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exit 1
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;;
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esac
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done
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# Set up some bind mounts we'll want regardless of chroot or not
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mkdir -m 0755 -p "$mountPoint/dev" "$mountPoint/proc" "$mountPoint/sys" "$mountPoint/run"
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mount --rbind /dev "$mountPoint/dev"
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mount -t proc none "$mountPoint/proc"
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mount -t sysfs none "$mountPoint/sys"
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mount -t tmpfs none "$mountPoint/run"
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# Run the activation script. Set $LOCALE_ARCHIVE to supress some Perl locale warnings.
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LOCALE_ARCHIVE=$system/sw/lib/locale/locale-archive chroot "$mountPoint" "$system/activate" >&2
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exec chroot "$mountPoint" "${command[@]}"
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