a radical and experimental distribution based on musl libc and busybox
http://sabo.xyz
linuxlightweightserverdesktopefficientfastradicalno-systemdembeddedmuslhardcoreno-dbusno-bullshitdistrobusybox
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
103 lines
2.4 KiB
103 lines
2.4 KiB
#!/bin/sh
|
|
[ -z "$CONFIG" ] && CONFIG=./config
|
|
. "$CONFIG"
|
|
export H="$PWD"
|
|
ret=0
|
|
|
|
if [ -z "$R" ] ; then
|
|
echo 'no R environment var set, your config is broken'
|
|
exit 1
|
|
elif [ "$R" = / ] ; then
|
|
echo "error: R=/ can't be used with this script, as it would make"
|
|
echo "your host sys unusable after returning. (umounting /dev /proc...)"
|
|
exit 1
|
|
fi
|
|
|
|
mkdir -p "$R"/src/tarballs
|
|
linux32=
|
|
if [ $(uname -m) = "x86_64" ] ; then
|
|
case "$A" in i?86)
|
|
echo "trying to get into 32bit rootfs from 64bit host"
|
|
[ -x ./linux32 ] && linux32=./linux32 || {
|
|
$CC "$K"/linux32.c -static -s -Os -o ./linux32 && linux32=./linux32 || \
|
|
echo -ne "warning: trying to chroot into i386 rootfs on x86_64" \
|
|
"kernel and building linux32 command failed\n"
|
|
} ;;
|
|
esac
|
|
fi
|
|
|
|
uid="$(id -u)"
|
|
if [ -d /proc/self/ns ] ; then
|
|
CHROOT=./super_chroot
|
|
if [ ! -x "$CHROOT" ] ; then
|
|
if ! $CC "$K"/super_chroot.c -static -s -Os -o "$CHROOT" 2>/dev/null ; then
|
|
echo "error: failed to build super_chroot!"
|
|
echo "try: musl-gcc KEEP/super_chroot.c -o super_chroot"
|
|
echo "or: re-run ./enter-chroot as root."
|
|
exit 1
|
|
fi
|
|
fi
|
|
else
|
|
if [ "$uid" != "0" ]; then
|
|
printf -- "need to be root. please enter password.\n"
|
|
su -c "$0"
|
|
exit $?
|
|
fi
|
|
|
|
# prevent from mounting twice
|
|
if [ ! -d "$R"/dev/pts ] ; then
|
|
mount --bind /dev "$R"/dev
|
|
mount --bind /dev/pts "$R"/dev/pts
|
|
mount --bind /dev/shm "$R"/dev/shm
|
|
mount --bind /proc "$R"/proc
|
|
mount --bind "$C" "$R"/src/tarballs
|
|
fi
|
|
|
|
CHROOT=chroot
|
|
fi
|
|
|
|
set_title() {
|
|
[ "$TERM" != "linux" ] && [ "$TERM" != "vt100" ] && \
|
|
printf "\033]2;%s\007" "$1"
|
|
}
|
|
|
|
if [ -n "$1" ]; then
|
|
$linux32 "$CHROOT" "$R" /bin/env -i \
|
|
HOME=/root PATH="/local/bin:/bin" TERM="$TERM" PS1='\u:\w$ ' \
|
|
"$@"
|
|
ret=$?
|
|
else
|
|
set_title "SABOTAGE CHROOT $(basename $R)"
|
|
|
|
echo "Entering chroot..."
|
|
|
|
$linux32 "$CHROOT" "$R" /bin/env -i \
|
|
HOME=/root TERM="$TERM" PS1='\u:\w$ ' \
|
|
/bin/ash --login
|
|
ret=$?
|
|
|
|
#echo empty line so we get a proper prompt back
|
|
echo
|
|
fi
|
|
|
|
tryumount() {
|
|
dest="$1"
|
|
if ! umount "$dest" 2>/dev/null; then
|
|
echo "unmount failure ($dest), retrying in 1 sec..."
|
|
sleep 1
|
|
if ! umount -f "$dest" 2>/dev/null; then
|
|
echo "unmount -f failure ($dest), trying last resort umount -l"
|
|
umount -l "$dest"
|
|
fi
|
|
fi
|
|
}
|
|
|
|
if [ "$CHROOT" = "chroot" ] && [ -d "$R"/dev/pts ] ; then
|
|
tryumount "$R"/src/tarballs
|
|
tryumount "$R"/dev/pts
|
|
tryumount "$R"/dev/shm
|
|
tryumount "$R"/dev
|
|
tryumount "$R"/proc
|
|
fi
|
|
|
|
exit $ret
|