a radical and experimental distribution based on musl libc and busybox
http://sabo.xyz
linux
server
desktop
lightweight
embedded
fast
distro
efficient
musl
no-systemd
no-dbus
radical
hardcore
busybox
no-bullshit
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104 lines
2.5 KiB
104 lines
2.5 KiB
#!/bin/sh
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[ -z "$CONFIG" ] && CONFIG=./config
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. "$CONFIG"
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export H="$PWD"
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ret=0
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if [ -z "$R" ] ; then
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echo 'no R environment var set, your config is broken'
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exit 1
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elif [ "$R" = / ] ; then
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echo "error: R=/ can't be used with this script, as it would make"
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echo "your host sys unusable after returning. (umounting /dev /proc...)"
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exit 1
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fi
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mkdir -p "$R"/src/tarballs
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linux32=
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if [ $(uname -m) = "x86_64" ] ; then
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case "$A" in i?86)
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echo "trying to get into 32bit rootfs from 64bit host"
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[ -x ./linux32 ] && linux32=./linux32 || {
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$CC "$K"/linux32.c -static -s -Os -o ./linux32 && linux32=./linux32 || \
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echo -ne "warning: trying to chroot into i386 rootfs on x86_64" \
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"kernel and building linux32 command failed\n"
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} ;;
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esac
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fi
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uid="$(id -u)"
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if [ -d /proc/self/ns ] ; then
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CHROOT=./super_chroot
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if [ ! -x "$CHROOT" ] ; then
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if ! $CC "$K"/super_chroot.c -static -s -Os -o "$CHROOT" 2>/dev/null ; then
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echo "error: failed to build super_chroot!"
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echo "try: musl-gcc KEEP/super_chroot.c -o super_chroot"
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echo "or: re-run ./enter-chroot as root."
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exit 1
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fi
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fi
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CHROOT="./super_chroot -b $C:./src/tarballs"
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else
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if [ "$uid" != "0" ]; then
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printf -- "need to be root. please enter password.\n"
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su -c "$0"
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exit $?
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fi
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# prevent from mounting twice
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if [ ! -d "$R"/dev/pts ] ; then
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mount --bind /dev "$R"/dev
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mount --bind /dev/pts "$R"/dev/pts
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mount --bind /dev/shm "$R"/dev/shm
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mount --bind /proc "$R"/proc
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mount --bind "$C" "$R"/src/tarballs
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fi
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CHROOT=chroot
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fi
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set_title() {
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[ "$TERM" != "linux" ] && [ "$TERM" != "vt100" ] && \
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printf "\033]2;%s\007" "$1"
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}
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if [ -n "$1" ]; then
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$linux32 $CHROOT "$R" /bin/env -i \
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HOME=/root PATH="/local/bin:/bin" TERM="$TERM" PS1='\u:\w$ ' \
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"$@"
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ret=$?
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else
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set_title "SABOTAGE CHROOT $(basename $R)"
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echo "Entering chroot..."
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$linux32 $CHROOT "$R" /bin/env -i \
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HOME=/root TERM="$TERM" PS1='\u:\w$ ' \
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/bin/ash --login
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ret=$?
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#echo empty line so we get a proper prompt back
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echo
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fi
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tryumount() {
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dest="$1"
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if ! umount "$dest" 2>/dev/null; then
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echo "unmount failure ($dest), retrying in 1 sec..."
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sleep 1
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if ! umount -f "$dest" 2>/dev/null; then
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echo "unmount -f failure ($dest), trying last resort umount -l"
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umount -l "$dest"
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fi
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fi
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}
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if [ "$CHROOT" = "chroot" ] && [ -d "$R"/dev/pts ] ; then
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tryumount "$R"/src/tarballs
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tryumount "$R"/dev/pts
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tryumount "$R"/dev/shm
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tryumount "$R"/dev
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tryumount "$R"/proc
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fi
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exit $ret
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