120 lines
3.0 KiB
Bash
Executable File
120 lines
3.0 KiB
Bash
Executable File
#!/bin/sh
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mount -t proc proc /proc
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mount -t sysfs sysfs /sys
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rm /dev/null; mknod -m 0666 /dev/null c 1 3
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rm /dev/zero; mknod -m 0666 /dev/zero c 1 5
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ln -sf ssmtp /usr/sbin/sendmail
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mdev -s
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# /proc/cmdline parser (from Gentoo Wiki)
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cmdline() {
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local value
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value=" $(cat /proc/cmdline) "
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value="${value##* $1=}"
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value="${value%% *}"
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[ "$value" != "" ] && echo "$value"
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}
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# Get some command line options
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USER_LOGIN=$(cmdline adlin.login)
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USER_PKEY=$(cmdline adlin.key)
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USER_IP=$(cmdline adlin.ip)
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ROOT_PASSWORD=$(cmdline adlin.rootpasswd)
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[ -f /etc/shadow_ ] && mv /etc/shadow_ /etc/shadow
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[ -n "${USER_IP}" ] && echo "${USER_IP}" > /root/my_ip
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[ -n "${ROOT_PASSWORD}" ] && sed -i "/^root:/s@!@${ROOT_PASSWORD}@" /etc/shadow
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# Handle extra user from /etc/shadow
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sed -r 's/^([^:]+):.*$/\1/' /etc/shadow | while read u; do
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grep -q "^$u" /etc/passwd || {
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i=$(($(wc -l /etc/passwd | cut -d ' ' -f 1) + 988))
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echo "$u:x:$i:$u" >> /etc/group
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echo "$u:x:$i:$i:new user:/home:/bin/ash" >> /etc/passwd
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}
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done
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# Define hostname
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hostname adlin-${USER_LOGIN}
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update-ca-certificates > /dev/null 2> /dev/null
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# Launch some TTYs
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for i in `seq 2 6`
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do
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while true
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do
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/usr/bin/setsid /sbin/agetty -l /sbin/fakelogin 38400 "tty${i}" linux
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done &
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done
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# Hide us!
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/bin/rm -f /init /linuxrc
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# Randomize time at boot
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/bin/date 0$((1 + $RANDOM % 9))0$((1 + $RANDOM % 9))0$((1 + $RANDOM % 9))$((0 + $RANDOM % 6))$((1 + $RANDOM % 9))$((70 + $RANDOM % 30)).$(($RANDOM % 6))$((1 + $RANDOM % 9)) > /dev/null
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/sbin/sysctl -w kernel.panic_on_warn=1 > /dev/null
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/sbin/sysctl -w net.ipv4.ip_default_ttl=4 > /dev/null
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# Launch some daemons
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#/usr/bin/setsid /usr/sbin/crond > /dev/null &
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/usr/bin/setsid /bin/shadow-up > /dev/null 2> /var/log/sup.log &
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# Prepare bonus 2
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mkdir -p /mnt
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/bin/dd if=/dev/zero of=/dev/blk count=1 bs=10240000 > /dev/null 2> /dev/null
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cat <<EOF | fdisk /dev/blk > /dev/null 2> /dev/null
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n
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p
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1
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+5M
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w
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EOF
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LOOPDEV=$(losetup -f)
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losetup -P "${LOOPDEV}" /dev/blk > /dev/null 2> /dev/null
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mdev -s
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/sbin/mkfs.ext4 "${LOOPDEV}p1" > /dev/null 2> /dev/null
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mount "${LOOPDEV}p1" /mnt > /dev/null 2> /dev/null
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N1=$((29 - $RANDOM % 25))
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N2=$((3 + $RANDOM % 25))
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{
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printf %02d $N1
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printf %02d $N2
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echo -n ${USER_PKEY:$N1:$N2} | sha512sum | cut -d " " -f 1
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} > /mnt/bonus2
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sync
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rm /mnt/bonus2
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sync
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umount /mnt
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# Launch requested init
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if grep init= /proc/cmdline > /dev/null 2> /dev/null
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then
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INIT=$(cmdline init)
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[ -z "${INIT}" ]
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while true
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do
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sleep $((10 + $RANDOM % 49))
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beep -f 1000 -r 2 -n -r 5 -l 10 -n
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done &
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grep console=ttyS0 /proc/cmdline > /dev/null 2> /dev/null && /usr/bin/setsid sh -c "exec '${INIT}' </dev/ttyS0 >/dev/ttyS0 2>&1"
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exec /usr/bin/setsid sh -c "reset; exec '${INIT}' </dev/tty1 >/dev/tty1 2>&1"
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else
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grep console=ttyS0 /proc/cmdline > /dev/null 2> /dev/null && /usr/bin/setsid /sbin/agetty -l /sbin/fakelogin 38400 "ttyS0" linux
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while true
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do
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/usr/bin/setsid /sbin/agetty -l /sbin/fakelogin 38400 tty1 linux
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done
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fi
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