blob: fd68e60723db526d0a25bfdfc4066c522a5e05a4 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
#!/bin/sh
# shellcheck source=./default.conf
. "./default.conf"
# builds a hard disk image for a stage 1 system:
# no ramdisk, no modules, no fancy startup, just a shell script
cd $CROSS_HOME || exit 1
umount mnt
rm -rf mnt
sudo /sbin/losetup -d /dev/loop2
sudo rm -f arch486.img
# prepare a plain image
qemu-img create arch486.img 4g
chmod 666 arch486.img
sudo /sbin/losetup /dev/loop2 arch486.img
sudo dd if=/dev/zero of=/dev/loop2 bs=512 count=32130
echo ';' | sudo /sbin/sfdisk --no-reread /dev/loop2
sudo sfdisk -A /dev/loop2 1
sudo partx --show /dev/loop2
sudo partx -v --add /dev/loop2
sudo mkfs.ext4 -O ^64bit /dev/loop2p1
mkdir mnt
sudo mount /dev/loop2p1 mnt
sudo cp -a i486-root/* mnt/.
sudo chown -R cross:cross mnt/.
cd mnt || exit 1
# A simple ISOlinux boot loader booting from first partition, starting
# uinit wich start /etc/init/boot
mkdir boot/syslinux
echo 'default /boot/vmlinuz-linux root=/dev/hda1 init=/sbin/init console=ttyS0 console=tty0' \
> boot/syslinux/syslinux.cfg
sudo dd bs=440 count=1 if=/usr/lib/syslinux/bios/mbr.bin of=/dev/loop2
cp /usr/lib/syslinux/bios/*.c32 boot/syslinux/.
sudo extlinux --install boot/syslinux/
mkdir -p etc/init
# the unit boot script configuring virtual filesystems, the network
# and starts an SSH daemon
cat >etc/init/boot <<EOF
#!/bin/sh
mount -t proc proc /proc
ln -s /proc/self/fd /dev/fd
ln -s /proc/self/fd/0 /dev/stdin
ln -s /proc/self/fd/1 /dev/stdout
ln -s /proc/self/fd/2 /dev/stderr
mkdir /dev/pts
mount -t devpts devpts /dev/pts
ln -s /proc/kcore /dev/core
mount -t sysfs sys /sys
mkdir /dev/shm
mount -t tmpfs shm /dev/shm
mount -o remount,rw /
ip link set up dev eth0
ip addr add ${STAGE1_MACHINE_IP}/24 dev eth0
ip route add default via 192.168.1.1 dev eth0
/usr/sbin/sshd
exec /usr/bin/bash
EOF
cat > etc/resolv.conf <<EOF
nameserver 192.168.1.1
EOF
# SSH confiuration: nobody user and host keys, keys for key based login
cat >> etc/group <<EOF
nobody:x:99:
EOF
cat >> etc/passwd <<EOF
nobody:x:99:99:nobody:/:/usr/bin/nologin
EOF
cat >> etc/ssh/sshd_config <<EOF
PermitRootLogin yes
EOF
ssh-keygen -b 2048 -t rsa -f etc/ssh/ssh_host_rsa_key -N ''
ssh-keygen -b 1024 -t dsa -f etc/ssh/ssh_host_dsa_key -N ''
ssh-keygen -b 521 -t ecdsa -f etc/ssh/ssh_host_ecdsa_key -N ''
ssh-keygen -b 2048 -t ed25519 -f etc/ssh/ssh_host_ed25519_key -N ''
chmod 0400 etc/ssh/ssh_host_*_key
mkdir root/.ssh
cp "$HOME/.ssh/id_rsa.pub" root/.ssh/authorized_keys
# install a build user and build directory
cat >> etc/group <<EOF
tty:x:5:
build:x:1001:
EOF
cat >> etc/passwd <<EOF
build:x:1001:1001:build:/build:/bin/bash
EOF
mkdir -p build
mkdir build/.ssh
cp "$HOME/.ssh/id_rsa.pub" build/.ssh/authorized_keys
chown 1001:1001 build
# default PAM rules expect a password to be set for su?
echo 'build:xx' | chpasswd
# add some test programs to test the C and C++ compiler
cat > root/test.c <<EOF
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int main( int argc, char *argv[] )
{
puts( "hello" );
exit( EXIT_SUCCESS );
}
EOF
cat > root/test.cpp <<EOF
#include <iostream>
#include <cstdlib>
int main( void )
{
std::cout << "hello" << std::endl;
std::exit( EXIT_FAILURE );
}
EOF
# put proper pacman.conf in place
mv etc/pacman.conf.pacnew etc/pacman.conf
# fix permissions (we only have root on the image)
chmod 0700 root/.ssh
sudo chown -R root:root .
sudo chmod 0775 etc/init/boot
# umount and clean up partitions and loopback devices
cd .. || exit 1
sudo umount mnt
sudo partx -v --delete /dev/loop2
sudo losetup -d /dev/loop2
|