diff options
author | davidovski <david@davidovski.xyz> | 2022-02-13 11:33:59 +0000 |
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committer | davidovski <david@davidovski.xyz> | 2022-02-13 11:33:59 +0000 |
commit | 4fe51b010d556805987e43f56df9c00ed0dc1242 (patch) | |
tree | 7bbacfb8bc342fec59b8092ef2e3d4384fc2b36d /src/xichroot | |
parent | e7608e7844da2d9c9ef096446e91870b2b3fcff2 (diff) |
added xichroot
Diffstat (limited to 'src/xichroot')
-rwxr-xr-x | src/xichroot | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/src/xichroot b/src/xichroot new file mode 100755 index 0000000..7136e25 --- /dev/null +++ b/src/xichroot @@ -0,0 +1,58 @@ +#!/bin/bash +# This script is intended for root users to automatically mount requried dirs and chroot into an installed system +# simplifed version of arch-chroot from <https://github.com/archlinux/arch-install-scripts> + +args=$@ +target=$1 + +die() { printf "$@\n"; exit 1;} + +ignore_error() { + "$@" 2>/dev/null + return 0 +} + +chroot_add_mount() { + mount "$@" && CHROOT_ACTIVE_MOUNTS=("$2" "${CHROOT_ACTIVE_MOUNTS[@]}") +} + +chroot_maybe_add_mount() { + local cond=$1; shift + if eval "$cond"; then + chroot_add_mount "$@" + fi +} + +chroot_setup() { + CHROOT_ACTIVE_MOUNTS=() + [[ $(trap -p EXIT) ]] && die '(BUG): attempting to overwrite existing EXIT trap' + trap 'chroot_teardown' EXIT + + chroot_add_mount proc "$target/proc" -t proc -o nosuid,noexec,nodev + chroot_add_mount sys "$target/sys" -t sysfs -o nosuid,noexec,nodev,ro + ignore_error chroot_maybe_add_mount "[[ -d '$1/sys/firmware/efi/efivars' ]]" \ + efivarfs "$target/sys/firmware/efi/efivars" -t efivarfs -o nosuid,noexec,nodev + chroot_add_mount udev "$target/dev" -t devtmpfs -o mode=0755,nosuid + chroot_add_mount devpts "$target/dev/pts" -t devpts -o mode=0620,gid=5,nosuid,noexec + chroot_add_mount shm "$target/dev/shm" -t tmpfs -o mode=1777,nosuid,nodev + chroot_add_mount /run "$target/run" --bind + chroot_add_mount tmp "$target/tmp" -t tmpfs -o mode=1777,strictatime,nodev,nosuid +} + +chroot_teardown() { + if (( ${#CHROOT_ACTIVE_MOUNTS[@]} )); then + umount "${CHROOT_ACTIVE_MOUNTS[@]}" + fi + unset CHROOT_ACTIVE_MOUNTS +} + +[ "$EUID" -eq 0 ] || die "Please run this as root" +[[ -d $target ]] || die "$target is not a directory; cannot chroot!" + +chroot_setup $@ + +if [ $# -gt 1 ]; then + chroot $@ +else + chroot $@ /bin/sh -l +fi |