forked from mirrors/nixpkgs
78 lines
1.9 KiB
Bash
78 lines
1.9 KiB
Bash
#! @runtimeShell@
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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 [ -z "$NIXOS_ENTER_REEXEC" ]; then
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export NIXOS_ENTER_REEXEC=1
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if [ "$(id -u)" != 0 ]; then
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extraFlags="-r"
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fi
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exec unshare --fork --mount --uts --mount-proc --pid $extraFlags -- "$0" "$@"
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else
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mount --make-rprivate /
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fi
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mountPoint=/mnt
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system=/nix/var/nix/profiles/system
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command=("$system/sw/bin/bash" "--login")
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silent=0
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while [ "$#" -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="$1"; shift 1
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;;
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--help)
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exec man nixos-enter
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exit 1
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;;
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--command|-c)
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command=("$system/sw/bin/bash" "-c" "$1")
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shift 1
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;;
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--silent)
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silent=1
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;;
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--)
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command=("$@")
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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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if [[ ! -e $mountPoint/etc/NIXOS ]]; then
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echo "$0: '$mountPoint' is not a NixOS installation" >&2
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exit 126
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fi
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mkdir -p "$mountPoint/dev" "$mountPoint/sys"
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chmod 0755 "$mountPoint/dev" "$mountPoint/sys"
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mount --rbind /dev "$mountPoint/dev"
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mount --rbind /sys "$mountPoint/sys"
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(
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# If silent, write both stdout and stderr of activation script to /dev/null
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# otherwise, write both streams to stderr of this process
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if [ "$silent" -eq 1 ]; then
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exec 2>/dev/null
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fi
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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" 1>&2 || true
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# Create /tmp
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chroot "$mountPoint" systemd-tmpfiles --create --remove --exclude-prefix=/dev 1>&2 || true
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)
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exec chroot "$mountPoint" "${command[@]}"
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