diff options
Diffstat (limited to 'nixpkgs/nixos/modules/installer/tools/nixos-enter.sh')
-rw-r--r-- | nixpkgs/nixos/modules/installer/tools/nixos-enter.sh | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/nixpkgs/nixos/modules/installer/tools/nixos-enter.sh b/nixpkgs/nixos/modules/installer/tools/nixos-enter.sh new file mode 100644 index 000000000000..518dbbbf21e3 --- /dev/null +++ b/nixpkgs/nixos/modules/installer/tools/nixos-enter.sh @@ -0,0 +1,61 @@ +#! @shell@ + +set -e + +# Re-exec ourselves in a private mount namespace so that our bind +# mounts get cleaned up automatically. +if [ -z "$NIXOS_ENTER_REEXEC" ]; then + export NIXOS_ENTER_REEXEC=1 + if [ "$(id -u)" != 0 ]; then + extraFlags="-r" + fi + exec unshare --fork --mount --uts --mount-proc --pid $extraFlags -- "$0" "$@" +else + mount --make-rprivate / +fi + +mountPoint=/mnt +system=/nix/var/nix/profiles/system +command=($system/sw/bin/bash "--login") + +while [ "$#" -gt 0 ]; do + i="$1"; shift 1 + case "$i" in + --root) + mountPoint="$1"; shift 1 + ;; + --system) + system="$1"; shift 1 + ;; + --help) + exec man nixos-enter + exit 1 + ;; + --command|-c) + command=($system/sw/bin/bash "-c" "$1") + shift 1 + ;; + --) + command=("$@") + break + ;; + *) + echo "$0: unknown option \`$i'" + exit 1 + ;; + esac +done + +if [[ ! -e $mountPoint/etc/NIXOS ]]; then + echo "$0: '$mountPoint' is not a NixOS installation" >&2 + exit 126 +fi + +mkdir -m 0755 -p "$mountPoint/dev" "$mountPoint/sys" +mount --rbind /dev "$mountPoint/dev" +mount --rbind /sys "$mountPoint/sys" + +# Run the activation script. Set $LOCALE_ARCHIVE to supress some Perl locale warnings. +LOCALE_ARCHIVE=$system/sw/lib/locale/locale-archive chroot "$mountPoint" "$system/activate" >&2 || true + +exec chroot "$mountPoint" "${command[@]}" |